Chain hoists and other equipment with the tacit understanding

manual hoist small lifting equipment in the most common form, he not only can be used alone but also with the rail clamp, monorail car, used in combination with I-beam. The following details for your presentation:
Clamp rail link  Chain Block   can be used as a tool with the beam. Stable lifting objects can also be used as a tool, chain hoist hook rail clamps directly.
I-beam monorail car can be divided into fixed and sliding, monorail  chain block   can be used in combination with the heavy lifting handling.

When the chain hoist and trolley combination be confirmed

   Wire rope hoist  electric sports car built in order to achieve the flexibility to move around on the I-beam, but when the chain hoist and trolley combination need to confirm what issues to ensure the safe use of electric  rope hoist  it? The following is to introduce you:
       1, with or without cause malfunction of foreign electric car, the track is level.
       2, chain electric hoist and trolley combination is being accurate, location or without offsets.
       3, in the  hoist and trolley  driving traverse track, if used effectively install car stopper.
       4, in the traverse rail road surface is attached to the paint and oil.

Mini electric hoist load chain lubrication

   Chain hoist  load chain  lubrication level is a key factor in life. So everyday to load chain lubrication timely and effective manner in order to ensure the effective life of the chain.
       For multi-line mini electric chain hoist, the hook should ensure that the next frame will not be overturned. If you flip it back to its normal state, to ensure the chain of weld arranged in rows. Do not twist the  rope hoist  hanging load.
       Connect the power cord must be cut off in advance. Meanwhile ground should be well grounded, otherwise the operator touches or chain hoist when any part, may feel a shock feeling.
       Mini  Wire rope hoist  factory, is based on a user-specified voltage or high voltage equipment, such as 230/460V, need to check the wiring and make sure the power supply voltage requirements are met. If not, please refer to the manual must be corrected in order to meet the operating voltage requirements.

cd wire rope hoist installation should pay attention to the details

My Group's technical staff has a very rich production, production and testing experience, the following is tested before leaving the factory according hoist,  wire rope hoist  experiments summarized in installation requires attention to detail, and I hope you  rope hoist  installation help.
        1, cd wire rope hoist has two limit, upper and lower limit stop position adjustment before they can block lifting objects.
        2, appeared before use if found rope bending, deformation, corrosion and other phenomena, never operate.
        3, before installation with 500V megger check the motor and control box insulation resistance, cold resistance at room temperature should be larger than 5M, can be used.
        4, cd wire rope hoist rated load from the hook in on the nameplate, do not exceed the rated load capacity of lifting heavy objects.
        5, do not lift the wire rope hoist as lifting mechanism for manned.
        6, the following shall not be someone lifting objects.
        7, not inclined  lift hoist s, lifting objects, hook in the swing state can not lift.
        8, the limit does not allow repeated use as a limit switch.
        9, do not hand switches wire before pulling other objects.
        10 cd wire rope hoist maintenance checks must pay at no load state.

How to avoid explosion-proof electric hoist mechanical friction

     Explosion-proof hoist due to its characteristics and more for a special place, but how to avoid friction between two mechanical components to extend the life of  Wire rope hoist  to avoid mechanical friction or impact sparks and dangerous temperature danger it? The following for you to do the following description:
       1 explosion-proof  Rope hoist  rope surface should be no broken wires.
       2, the rope should be reliable lubrication of measures to reduce the wire rope and reel, guide rope and pulley friction between.
       3, the brake should be installed inside the flameproof enclosure.
       4, explosion-proof hoist orbit joints should be smooth, flat, the car should be no impact on the operation of the phenomenon.
       5, good maintenance inspection work to ensure proof electric hoist trolley starting and braking stability and prevent skidding.
       6, there are two tracks in a unified proof hoist operation above, electric hoist should be fortified shock absorbing devices. Buffer device shall be non-metallic materials, the surface resistance of not more than 10
       7, when a metal barrier proof  rope hoist  working environment is large, to avoid an obstacle collision with a metal hook, the hook should be marked on the outer surface of the pulley plates such as the prohibition collision warning label.
       8, explosion-proof electric hoist exposed sectors with a relatively friction movement speed measures should be taken, such as the involvement of the wire rope and drum hoist trolley line speed and running speed on the track shall be greater than 25m/min.

Dedicated lines hanging electric hoist

Dedicated lines hanging electric hoist

    Hanging  Wire rope hoist  is commonly known as micro-electric, electric hoist can not cope with this electric car use. Hanging electric hoist is mainly used in: In addition to the automobile manufacturing industry outside as parts assembly, and high-tech industrial zone and other modern industrial production line, assembly line, assembly, logistics, transportation and so on and so on can be applied. Hanging  rope hoist  used in many places is the most warehouses, docks, ingredients, hanging baskets and space than small workplaces. This hanging gourd beautiful appearance, reasonable structure, easy installation, low noise, safe and reliable, and other related characteristics, especially in the pipeline reflects an irreplaceable advantage.

Electric hoist chain replacement judge

       Frequent use of  Wire rope hoist  lifting goods chain wear most frequently, so after work in the use of electric hoist hoist want to conduct a comprehensive inspection, especially the chain part, need to pay attention to daily maintenance, will not be guaranteed hoist life.
Explain the electric hoist  load chain  scrapped and replaced by:
1, chain and monocyclic permanent elongation shall not exceed 5% of the original length.
2, bend from the main ring plane, counting the main ring twisted more than 10 degrees should be scrapped.
3, the chain hoist must not exceed permissible wear value chain ring diameter of the bar or 10% of the thickness of assistive devices.
4, lifting any part of the chain of cracks, bends or distortions between the hinge and the ring stuck or stiff astringent entrapment phenomenon and can not be excluded prohibited.

How to choose an electric hoist lifting chain

 Crane lifting chain is the most widely used one of  Hoist equipment   electric chain hoists used in many industries, the chain hoist is directly related to the quality of life and safety, the following shows you how to use  wire rope hoist  lifting chain For your reference:
One, first check the appearance of the chain:
1 inner / outer links are deformed, cracks, corrosion embroidered
2 pin is deformed or turn, embroidered eclipse
3 roller whether cracks, damage. Excessive wear
4 connector is loose deformation
5 there is no abnormal noise when running or abnormal vibration, hoist chain lubrication in good condition
Two, followed by a long  load chain  of measurement accuracy:
1 after cleaning before measurement chain
(2) will be measured on a chain around the two sprockets, chain up and down both sides of the test should be supported
3 before the measurement chain should be applied in one third of the minimum ultimate tensile load state visit 1min
4 measurements, impose requirements on the chain measuring load, so up and down both sides of the chain tensioner. Chain on sprocket teeth should ensure proper fit
5 Measuring two sprocket center distance
Three, the last measurement chain elongation:
1 for the removal of the entire chain of clearance, to exert some degree of chain pulling tension measured
(2) measurement, in order to minimize errors in the 6-10 section (link) where measurements
3 for measuring the number of roller sections between the inner dimensions L1 and L2 outward, in order to determine the size L = (L1 + L2) / 2
4 obtained hoist chain elongation length, this value chain elongation and front entry in contrast to the use of threshold values.
Chain elongation = judgment dimension - the reference length / reference length * 100%
Reference length = chain pitch * Session

Electric hoist grounding system how to detect

      Detecting  Wire rope hoist  grounding system in two ways: The first is to measure the electric shake table testing, and the second is to use clamp-on resistance meter testing.
(1) Electricity shake table
Mainly used to measure electric hoist a point grounding resistance.
(2) Clamp resistance measuring instrument
The instrument will generate an AC voltage signal E, E is a known quantity, the coil current measurement instrument measured a current value, whereby the loop resistance of E / I. If the instrument displays <10Ω, you can determine where the grounding resistance (10Ω, if found instrument displays dozens Ω, then the need for further measurements judgment, but if the instrument displays the value is very high, it is necessary to check whether this ground is defective. If the TN-S system, with the vise jaws ground, it can be measured; if it is three-phase four-wire, grounding and repeated ground distribution system constitutes a loop. vise protective grounding wire can; if it is three-phase three-wire, Direct measurement of the ground wire is invalid because ungrounded power distribution device connected to the  rope hoist   therefore, by forming a loop. only measure the ground resistance of the grounding.

Ideal electric hoist motor protection

Ideal electric hoist motor protection

Motors,  Wire rope hoist  one of the most important components, the use of decision hoist motor life, so for some of the general motors are equipped with protective devices, because insulation technology continues to evolve, both in the design of the motor requires increased efforts, reduce the volume required to make new electric hoist motor is getting smaller and smaller thermal capacity, the load is increasingly weak, and then due to the production increased automation, requiring the motor frequently run in the frequent starting, braking, reversing and variable load variety of ways, for motor protection devices put forward higher requirements.
Traditional  rope hoist  motor protection devices as "thermal relay," which, but the thermal relay low sensitivity, error, poor stability, protection is not reliable. The motor damage and affect normal production of the phenomenon is still widespread.
Ideal motor protection is not the most versatile, but not so-called art, but should meet the actual needs of the scene, so that the unity of economy and reliability, with high cost. According to the actual situation of the scene selection  lift hoist  motor protection type, taking into account the protection of installation, adjustment, easy to use and so on.

How to prevent electric hoist surface rust

       wire rope hoist  lifting gear, the most common one, as  Hoist equipment  , improper maintenance is very easy to rust, surface rust not only reduces the service life of electric hoist, also affect the work efficiency, so to prevent electric hoist surface rust, is maintenance the most important task, to provide you the following methods to prevent rusting gourd, for your reference:
       1,  Rope hoist  gear box, gear should be coated with rust containing barium petroleum sulfonate grease, and regularly check the corrosion protection film full circumstances and situations.
       2, gourds of various parts of the exposed surface of the machined threaded surfaces and exposed perishable parts shall apply grease or other calcium-based rust rust grease.
       3, for the wire rope hoist, its surface should be coated with rust-proof wire rope lubricant, in the non-operating conditions should be wrapped in a tarpaulin or plastic outer film.
       4, the hook bearing, to inject calcium-based grease with rust rust and always check, rust effect, to extend the use of the results.

Classification and Application of lifting tackle

Hoist and trolley used for lifting heavy objects, generally supporting the use of the winch are generally widely used in water conservancy, construction, infrastructure installation, transportation and other aspects of plant mines.
Lifting tackle may be composed of materials classification, shape, number of pulleys, use or to distinguish between different attachment. Commonly used are:
Wood block: it is based on vehicles can be divided into different zones brought, within a band of iron, iron outer three kinds
Iron block: Shell and pulley is made of steel.
Wood and iron pulley pulley pulley according to their number of different and each can be divided into single-round, two-wheeled, three other wood, iron block.
Lifting tackle. Intuit made by the Gang, and its larger wheels and ball bearings installed. Use points to note:
hoist and trolley pulley should be used according to the degree, carry out regular inspections to check the wheel groove, sky, bearing wear, oil is smooth, car belt, hanging equipment and pulleys for cracks, links, shackles whether whistle is securely locked shaft and bearing, hooks and other wear and tear than the original size of 1,10, new ones should always be kept lubricated oil should be properly dressed reel rope, twisted rope reel is relatively longer used to wear when rope reel, habits is the first link on a pulley lifting tackle in the eye ring, and with a good eye ring plugged in with a shackle on the link in the lifting tackle.

The wire rope electric hoist inspection and maintenance

    Wire rope hoist  used equipment links between the subject and the hook, play an irreplaceable role in any parts of its service life when used with our daily and is closely related to the maintenance, introduction to the use of wire rope inspection and maintenance.
      Before rope lubrication should rope appearance backlog cleaned of dirt and rust, grease, heated to 60 ° C or so, the grease can fully penetrate into the interior rope.
Wire rope electric hoist work inevitably tension, compression, friction, torsion loads. At the same time, followed by rope through the pulley ethephon, when not affected by repeated bending and squeezing effects arise from broken wire fatigue phenomenon, coupled with other factors such as wear and corrosion, increased development of Wire Ropes, so we deal with every week conduct a visual inspection of wire rope, a small number of broken wires should be properly disposed of, to prevent broken wires so that other broken wires, wire rope for individual segments, should be promptly amputated
      Fixed  Rope hoist  for not reversed, because the special structure surround entanglement must not disrupt or interfere when the original fixed pitch between the strands to prevent slippage or outer core rope slack strands forming the cage shape. In the pulley, when the rope around the pulley, the rope being repeated reverse bending, the bending stress in the direction also changes, this alternating stress, certainly reduce the life of wire rope, therefore, the use of pulleys, best to use the rope bent in the same direction as the pulley.

Electric wire rope hoist is a two-cylinder

    Wire rope hoist  is a hoist two is an essential cylinder device, the two devices is the overload limiter, breaking firearms, a talking drum rope drum.
      Electric wire rope hoist overload limiter main role is played in working condition when the  Rope hoist  judgment device, make the appropriate sound and light indication, such as normal lifting condition, fully loaded lifting state overload lifting the state of automation monitoring equipment, automatic alarm when overload will stop lifting weights.
      Electric wire rope hoist is mainly used firearms off the voltage to 380V, DC to 220V, 50Hz AC power lines to use. This is mainly used off the fire stopper 0.5 tons to 10 tons CD1 and MD1 model electric hoist electric hoist up, down limit protection purposes. Breaking quick direct upgrade hoist the main circuit.
      wire rope hoist  rope winding drum is used, generally CD1 electric hoist drum has a cable device, so that the roll of wire rope and then chaos will not be involved, and this is rising, falling, lifting and tightening up rope A major component of wire rope.

Replacing the wire rope hoist

       Wire rope hoist  rope  is used to connect the main part of the hook, is to ensure the normal operation of hoist one essential accessory, but after prolonged use of wire rope electric hoist parts will wear, or there will be a slight bite rope rope phenomenon, Even more serious is biting rope wire rope breaking phenomenon occurred, processing methods can only replace the wire rope. For you to explain to replace wire rope electric hoist ways to ensure your efficiency.
      First make  rope hoist  hook down the bottom, put the reel guidewire removed Used hex wrench, remove the rope on the drum three pressure plates and a rope has been falling. After the hook out of the other end of the rope removed, using a feeler iron fixed, remove the tie clip with a wrench after the iron with a hammer and a sharp upward break out of the iron game, this time electric wire rope hoist completely removed, the method steps above to install the new rope.

Electric hoist abnormal power failure

     Currently, it is a lot of construction  hoist equipment  will be used, the use of such a common problem will be more common, today introduced the next one common failure, abnormal power to hoist the harm and solutions.
      Mainly because of power outages did not hoist the rated working voltage is turned, unable to work, the reason there is a solution with the power supply system is not right to send electric power  Wire rope hoist   hoist the main, the control circuit of electrical damage, the line is disconnected or bad .
      Workaround: Lord required maintenance, the control circuit, be sure to hoist motor is disconnected from the power line, when the confirmation Lord, control circuit trouble, before re-commissioning; hoist motor starting torque is too small, so that no  rope hoist  lifting moving goods, and can not work, check with a multimeter or voltage meter and other measuring motor input voltage, because the voltage is too low, the motor will not start, you need other system voltage returns to normal before using electric hoist.
      Electric hoist overspeed protection is also necessary, when the electric hoist conical surface and the second brake brake brake surface wear or planar grid voltage fluctuation, set in the high-speed shaft speed sensor will cut off the main power from the electric hoist to the protective effect.

Ultra narrow dead length type Chain Block

    Low-type  Chain Block ,  chain hoists and general greatly reduced compared to the length of its corners. The next hook chain hoists may have been up to the track below.

Limited due to the work environment or in the need to increase the lifting height of the structure, the section  manual hoist s can be effectively utilized.
       Chain hoist use is not very flexible, and to push heavy objects, hands clockwise pull  load chain  will ratchet friction plate, brake pressure into one common rotation axis will rotate sprocket teeth, so that the device spline hole lifting gear driven sprocket on lifting chain, smooth heavy lifting. But encountered dead general chain hoists are inevitable, and this is a drawback to use chain hoists,

Wire rope hoistremoval procedure

Wire rope hoist removal procedure


      In the field of Hoist equipment electric hoist lifting everywhere, more and more widely used, the use of questions are endless, which requires users to understand the electric hoist structure, encountered some minor problems can be resolved in order to ensure efficiency, a brief introduction of electric chain hoist Removal steps for your reference:
      Electric hoist disassembly is a sequential, the first step is to remove the forward handle, loose unloading handle, dust cover section, unscrew the bolts at the wing also hook chain hoist rope housing base and the guide hole fixing screws to open  rope hoist  can be disintegrated.
      Note: When removing the chain hoist should observe the various parts of the assembly position, especially palatal plate assembly position and size of the control board.

Corrosion on stainless steel wire rope hoist

    Wire rope hoist  general outdoor use in many cases, at the time a little long rope natural rust corrosion, especially in the harsh environment of harmful gas and use electric hoist, electric hoist for corrosion damage is more serious.
      Damage due to corrosion present on the surface of the hoist rope oxygen affinity differences, so that the surface of the anode of a local metal, another local metal adjacent the cathode, forming a large number of small cells. In a small battery under the action of many circular pits formed on the surface and gradually deepened. These pits became a stress concentration points, the source of fatigue cracks. Corrosion of the wire cross-sectional area decreases, flexibility and reduced ability to withstand shocks.
      rope hoist  rope to prevent corrosion damage in two ways, one is the ground oiled, often in a state of motion for oiled rope is essential. Second is the use of harsh environment, the relative movement of the rope can choose less zinc, aluminum and other special rope. These wire exposed to the atmosphere of the surface of zinc or aluminum hydroxide, zinc and hydrogen to form aluminum oxide film, and can effectively prevent corrosion of the rope hoist rope.

rope hoist camber to ensure normal operation of the load

Electric hoist camber to ensure normal operation of the load


   Note the use of the  rope hoist  has a very important point needs special attention, that is, the load on the electric hoist, avoid non-load operation, but daily use still have a lot due to the use of the load operation has to a greater extent to avoid this problem, the introduction of electric hoist bridge.
      It can guarantee a certain extent overhead electric hoist when the normal operation of the load, no load,  Wire rope hoist  bridge girders have L/1000 arch degrees, reaches the maximum allowable deflection under load should not be the main beam exceed L/700. In this range of camber and deflection, bridge wire rope electric hoist trolley is still able to maintain a normal working condition, so the bridge wire rope electric hoist double beam or single beam at the time of manufacture with L/1000 camber, you can to some extent, ensure that the load hoist can also be normal operation.
   Again, the majority of new and old customers and friends, in order to ensure safety and efficiency, should not use the hoist load.

rope hoist rope twists under the direction of classification

     Rope hoist  n its component parts is an important one, connected with the main hoist hook, thus lifting heavy objects can run up and down, the rope can be customized according to customer needs. Electric wire rope hoist as the main components, one for the  wire rope hoist  should also be more in-depth understanding, according to the direction of rope twists introduced different advantages and disadvantages of different categories:
      1, cross rope around: the wire twisted into shares by the direction of the spiral twisting strands twisted into a rope twisting spiral in opposite directions. The appearance of the wire ropes in the axial direction along the base. This rope rope twist stocks and trends can play a role in offsetting, lifting weights is not easy to twist and loose, which is widely used as a lifting rope. But shares of the contact between the outer wires poor condition easy to wear, short life, flexibility is poor.
      2, cis-roping: the wire wound into a stocks and shares by the rope wound around the same appearance stocks axis of the wire and rope into a larger perspective. It's flexible, long life, but there is a strong trend to reverse, easy self loose knot. Applies only to enhance or hauling along rigid rails and keep the tension place, should not be used as a lifting rope.

rope hoist switch failure reason

           Small   Rope hoist  lifting equipment and other  hoist equipment  use areas range extended from time to time, the process of applying the problems have gradually diversified  rope hoist switch today to explain the reason for failure, as the use of  rope hoist is one of the important components, so that we, as common sense understanding and control.

          rope hoist sometimes met at work after the switch but no response by the situation, which is due to  rope hoist no ordinary rated working voltage is turned, while the lead does not work, there are a few reasons in detail the following points:
1,  rope hoist Lord, damaged electrical control circuit, the line is disconnected or bad, but also make  rope hoist motor can not be energized, showing this situation, the need to overhaul the main, the control loop, in order to avoid the main overhaul, the control loop to give three-phase motor.
2, the power supply system for   wire rope hoist  whether the normal power transmission, testing ways to use test pencil tests, such as electricity and other power transmission did not get work again.
3, the load switch and isolation knife similar, there are significant gaps disconnected. Fuse is a simple electrical circuit maintenance, the principle is that when a current flows through the fuse reaches or exceeds the set value after a certain time, their melt condensation, breaking the circuit.
4,  rope hoist motor terminal voltage lower than the rated voltage of more than 10%, motor starting torque is too small, so that does not move cargo lifting hoist, and can not work, check with a multimeter or voltmeters measure motor input voltage, indeed because the voltage is too low, the motor can not be started, the need to wait for the system voltage returns to normal after the use of  rope hoist.

Inverter rope hoist application

1. Introduction inverter structure
Frequency conversion technology in the transmission tower hoist applications history, although some success application experience, there are a lot of inverter hoisting mechanism is now running the site, but compared with other industries, frequency conversion technology In the application of   rope hoist  tower far not reached the required level, which has cost reasons, there are technical reasons.
(1) drive brand is different, the use of different control loops;
(2) system is open-loop or closed-loop
(3) in the form of mechanical structure is not the same: L-type arrangement, п-type arrangement or a font layout, etc.;
(4) is not the same type of gear, such as: cylindrical gear reducer or planetary gear; ratio is fixed or variable speed ratio and so on.
On the drive control technology, the difference was not involved in the control of the above changes in the way, are using an inverter for speed control of a motor typical pattern can also be referred to as conventional inverter hoisting mechanism.
2. Conventional inverter hoisting mechanism design elements
(A) number of motor poles and power check
When lifting the basic parameters of a given institution, it has the number of poles of the motor and the power of determination and calculation, the point is:
a) motor output speed should be less than 3000 rev / min; rated torque for checking maximum weight;
b) the system should be less than the maximum operating frequency of 100Hz; when selecting the motor power, according to the above conditions will be able to determine the basic gear reduction ratio and the motor power and the number of poles.
(2) electrical control system design
a) the selection of the inverter
When the system's electric motor is determined, you can proceed with the control system design. Tower hoist for  lift hoist   it would be best used with a vector control function or is a DTC Direct Torque Control function of the inverter, the designer according to their level of familiarity, technical support, and other industries, the use of plant and other factors to choose.
b) the selection of energy resistance
As   Wire rope hoist  with inverter system, its design focuses on the state motor is in regenerative braking system reliability. This requires the designer to clearly understand the working process feedback frequency transmission only.
Most of the drive chain hoist product description on how to choose the resistance value of the energy and power are not very clear description, and often their recommended standard does not fully meet the requirements of lifting working conditions.

How to reduce rope hoist broken tooth

Forms of  rope hoist gear failure "broken tooth" and how to reduce the incidence of gear cut, summarize the following for your reference:
        Rope hoist  teeth like a cantilever under load to the tooth root bending stress generated by the largest and is alternating stress. When the gear loaded on one side, the stress changes by pulsation cycle; when the tooth sides under load, the stress cycle by symmetrical changes. Change gear by repeated bending stress the role of the tooth root stress concentration transition portion, when the stress exceeds the bending fatigue limit of the material, the tooth root fatigue crack, resulting in tooth fracture crack gradually extended. This break is called fatigue fracture. When the  rope hoist gear suddenly overloaded or worn by severe tooth thickness is too thin, it will also occur tooth broken, called overload broken. If the tooth width is too large, due to manufacturing and installation to the local error under load is too large, it will cause local break. In helical gears, the tooth working surface of the contact line is a slash, the teeth under load if load concentration occurs when the local break. If the bending deformation of the shaft caused by excessive localized tooth under load is too large, also the occurrence of local breaking.
Improve anti-fracture capacity   wire rope hoist  gear measures many, such as increasing the tooth root fillet radius to eliminate machining marks where the tooth root to reduce the stress concentration; increases the stiffness of the shaft and support materials to reduce tooth local overload extent; shot peening of teeth, cold rolling and other tooth surface processing to improve the hardness, toughness, etc. to keep the core portion.

rope hoist fault common solutions

rope hoist used increasingly widely, often used to enhance, led moving, loading and unloading heavy objects, tank flip chip bonding, such as various sized concrete, steel and mechanical equipment installation and move, for construction and installation companies, factories, mines and civil construction and bridge construction, electric power, shipbuilding, automobile manufacturing, construction, roads, bridges, metallurgical, mining, slope tunnels, wells and other infrastructure construction management protection of mechanical equipment. I'll explain in the use of  rope hoist common failures occurred during what is usually a solution

       rope hoist motor voltage is normal, while the  rope hoist that is not working, it should be considered for other reasons, for example: motor is burned, overhaul the need to replace the motor.

     Wire rope hoist  long-term need, poor maintenance, the brake wheel and cover rust, brake wheel when starting off is not open, the motor only issued a "hum" sound, turn it up, causing  rope hoist does not work. At this time, you should remove the brake wheel, cleaning corroded surfaces, and then re-test; serious motor sweep chamber, but also make the motor does not rotate, found this situation, you should stop using the motor must be overhauled or replaced to ensure  rope hoist work. In addition, the production of non-overloading using  rope hoist, when the goods are excessively overloaded,  rope hoist crane does not move goods, the motor will only issue a "hum" sound, rather than running, and in severe burning motor, or even cause an accident, then should immediately stop reduce the cargo, the  rope hoist work at rated power.

lift hoist driving brakes

     lift hoist  driving and now we call the crane basically the same, according to their functional and structural characteristics, can be roughly divided into the following four categories: small light  Hoist equipment ，  bridge cranes, jib cranes, lifts. Medium and small bridge cranes more use brakes, gear units and motors combined into one "triple play" drive mode, a large common bridge crane lifting weight for ease of installation and adjustment, universal coupling drive device often used . Which is very important brake, the brake is a brake. Brake into brake, parking brake. It is often said that the foot brake and handbrake.
         hoist and trolley  during use, generally used is the brake foot brake, facilitate advanced process slow down and stop, not only making the car remain intact. If driving Zhidongshiling when using the parking brake. When after a parked car, it is necessary to use the handbrake to prevent the vehicle front and rear slip slip. After stopping General In addition to using the parking brake, the uphill to stall hanging in a file, downhill to stall hanging in reverse.
        Brake is crucial, in the purchase related equipment, attention should be paid to ensure that the brake system is not the problem, can ensure safety.

Mini Wire rope hoist installation and maintenance

Diversification requirements lead to hoist the type and specifications are also more complex, but regardless of the type and then how to change some of the basic things still the same, mini rope hoist some advantages due to their own, are widely used in homes, supermarkets and other small areas of so called "civil hoist", here introduces a miniature  Wire rope hoist  installation and maintenance methods:
1, the new mini rope hoist purchased within the marked lifelong maintenance lubricants, use must keep enough oil and keep the oil clean and should not contain impurities and dirt.
2, mini wire rope  hoist installation location according to operational needs.
3, the rope should be installed to avoid direct contact with the stopper holder, or micro switch failure causes mini  rope hoist  is not working properly.
4, fixed mini Wire rope hoist need to use hex head bolts, flat washers, spring washers and other accessories
5, do not let the mini rope hoist is rain or soaked in water, mini Wire rope hoist protection rating of IP40.
6, regular inspection bolt fixed mini rope hoist and power lines, cable lines in the timely removal of accumulated dust and corrosive liquids.
7, micro-electric power after the work is the total gate must be opened, cut off the power.
8, prohibits the opposite direction while pressing two buttons, the other can manipulate.
9, mini Wire rope hoist lifting speed reducer overhaul disassembly may not use a screwdriver, flat shovel hit the joints, the application of a wooden hammer gently tap the protruding part of the box to avoid damage to the cabinet and lid sealing plane.

rope hoist switch failure

      Small  hoist equipment  field of use, expanding the scope of use issues are becoming increasingly diverse, and today we are discussing the reasons for failure of  rope hoist  switch, Wire rope hoist used as an important part, so that we, as common sense to understand and master. Wire rope hoist sometimes met at work after the switch did not respond by the situation, which is generally not turned on because the  rope hoist  rated working voltage, which led to not work, there are a few specific reasons in mind:
1, the power supply system for  rope hoist  power transmission is normal, the detection method using test pencil tests, such as no power transmission, power transmission, etc. after work.
2, the main hoist, electrical control circuit is damaged, the line is disconnected or bad, but also make Wire rope hoist motor can not be energized, such a situation, the need to repair the main, the control loop, maintenance, in order to prevent the main, the control loop to send for three-phase motors.
3,  rope hoist  motor terminal voltage lower than the rated voltage of more than 10%, motor starting torque is too small, so that does not move cargo lifting hoist, and can not work, check with a multimeter or voltage meter and other measuring motor input voltage, indeed because the voltage is too low, the motor can not be started, the need to wait for the system voltage returns to normal before using Wire rope hoist.
4, the load switch and isolation knife similar, there are significant gaps disconnected. Fuse is a simple electrical circuit protection, the principle is that when the current flowing through the fuse reaches or exceeds the setting value after a certain time, the melt itself melting the circuit.
      About  wire rope hoist  switch failure, there are other reasons exist.

Chain Block buying tips

       When it comes to  Chain Block  machinery industry people are familiar with, it is a portable, easy to use  hoist equipment   For small equipment and goods lifting a short distance, the weight is generally not more than 100T. Said more simply, manual hoist is a labor-saving tool.
Chain Blocks hands by pulling the chain, bracelet wheel rotation, the friction plate ratchet, brake pressure into one common rotation axis will rotate sprocket teeth, tooth stub shaft and spline hole gears. Thus, the device is splined sprocket holes on the lifting gear driven lifting chains, heavy lifting so smoothly.
        So in the purchase Chain Blocks, it should pay attention to what points in order to make you buy manual hoist easy to use, durable it
        1, according to their own needs to choose the right size Chain Blocks to choose the right specifications. Is a large non-standard small size means nothing more than your needs, small to die. Because this thing with the car on the road, can not be overloaded.
        2, to be optimistic about the nose casing for cracks. Because during use,manual hoists chassis very easy due to collision, falling and rupture.
        3, to check the chain is intact, the length is correct. And buy a few times when they repeatedly pull hand chain, check the chain is slipping.
        4, see the material, more durable chain is 80, preferably manganese steel hook.
        4, check the packaging and certificate  manual hoist .

Low headroom lift hoist limited spaces dedicated

lift hoist series where there is a limited place for specific products - ground clearance Rope hoist, suitable for mechanical processing, assembly, warehousing and other material handling options, especially for plant height restricted spaces.

Ground clearance Rope hoist  compact design of the body, and its excellent performance, in line with the latest international DIN, FEM standards to the technical level of similar foreign products.
Low headroom hoist the main advantages are:
1, the best headroom than ordinary CD hoist lifting height can increase 200 ~ 500mm.
2, excellent triple drive technology, lifting gear made of high quality alloy steel, three slow, smooth running, long life, reliable performance, avoiding the intermediate shaft hoist CD drive long distances many shortcomings.
3, the motor is specifically designed for the new self-cooled conical motor, the motor housing is a good thermal performance cast aluminum alloy materials, electrical insulation class F, protection class IP54, motors were higher than normal level.
4, electrical components for the world class Schneider products, using high-capacity components such as contactors, control switches and motors, and electrical components connected using quick plug, make on-site installation quicker; hoist cables are part of the leakage PE corrugated pipe protection ensure reliable cable connection.
5, according to user requirements do: Rope hoist equipment , lifting single and double speed or frequency stepless speed control, remote operation, overload protection, motor overheat protection and other functions.
Low headroom hoist to shorten the distance between the body and the beam orbit has a unique optimal structure.

Special Hoist equipment "metallurgical Rope hoist"

Metallurgy  Rope hoist  can be used as suited to the requirements associated with electric single girder, electric suspension, hoist double girder cranes, and other  lift hoist ，  can also be installed in a fixed overhead track independently, is small metallurgical workplace safe and reliable light small special  hoist equipment .

     Metallurgical adapt to the environmental characteristics of rope hoist:
 1, metallurgical  rope hoist  working class M5, M6; operating ambient temperature not higher than 60 ℃.
 2, there is a lifting mechanism configured to support brake and a safety brake, rope hoist in normal operation, the motor is braked by a brake cone, cone brake motor to support the brake when the motor brake failure or intermediate conical transmission link failure, shaft mounted speed reducer DC electromagnetic brake for heavy braking, to avoid heavy stall danger. Meanwhile, in order to coordinate the conical brake motor and the DC electromagnetic brake operation between, an additional delay in the control circuit device, to avoid traffic jam occurs motor.
 3, metallurgy rope hoist has an upper limit of a double limit function. The first limit is weight limit, the second limit of conventional rope hoist upper and lower limit stopper off the fire.
 4, from the weight limit protection, rope hoist lifting 90% rated load lifting limiter alarm, 105% of rated load lifting hoist power to stop working.
 5, high-temperature insulation protection, rope hoist drum shell in the design and installation of the machine below the heat shield to isolate the molten metal heat radiation.
 6, lifting the motor and run the motor insulation class Class F and lifting the motor windings built with overheating protection device.
 7, rope configuration metallurgy occasion dedicated high strength high temperature resistant wire rope.

How the various components of electric hoist work

    Wire rope hoist  for various occasions, especially for high-rise buildings to lift heavy items from downstairs. Hoist components How does it work  Today to briefly explain. First Wire rope hoist motor, transmission, drum and sprocket. Which motor is the most important part, does not allow press both the opposite direction of the  wire rope  hoist movement flashlight door button. Second, after the work must hoist the total gate pull the power, cut off the power. Does not work, you can not put heavy objects hanging in the air, to prevent parts produce permanent deformation.

      Wire rope hoist oil should be used in a stiff brush or a small piece of wood is forbidden by hand directly to a working rope oiled. Roll axis and the vertical axis of the motor and worm gear used,  rope hoist  motor axis parallel to the axis of the mandrel, the advantages of small size, height and length. Motor mounted inside the drum hoist, and its advantages for the length of the small size, compact structure. The main drawback of the motor cooling conditions are poor, poor packet, inspection, installation, maintenance motor inconvenience complex power supply unit. Installation and maintenance, must be strictly checked limit device is flexible and reliable, when hook up to the upper limit position, the hook shell distance greater than the distance of the roll shell.

      Finally, in the lower hoist overload limiter, installation, commissioning and maintenance must be strictly checked limit device is flexible and reliable. When the hook down to the lower limit position, should ensure safety rope on the drum circle, circle must be effective and safe in two laps or more.

       rope hoist  are widely used in machinery manufacturing, electronics, automotive, shipbuilding and other fields,  rope hoist  understand how the various components of the work, is for users should be aware of common sense.

Wire rope hoist protection period defined

Rope hoist Protection Period: mid-points (5-15 years) and long term (15 years and above) Protective Life corrosive environments: minutes in C3 (general industrial environment), C4 high (coastal environments)
Rope hoistprotective Term definition:
1 Rope hoist in the design protection period, the surface does not exceed the ISO4628-3 rust rust grades in Ri3 level (equivalent to ASTMD610 of six or European standards Re3 grade)
2,  lift hoist  the main consideration gloss finish selection and color retention, 4 files, PU412 aromatic polyurethane topcoat, PU413 aliphatic polyurethane topcoat, PU421 polyurethane topcoat  Wire rope hoist  machinery, PU420 polyurethane engineering automotive finish.
3, no zinc primer (EPMisc.) consideration was mainly rust resistance and high solids, one can achieve a dry film thickness of 80 microns, optional epoxy zinc phosphate primer, epoxy bottom aluminum tripolyphosphate paint.
4, zinc-rich primer required dry film (or non-volatile medium) zinc content (not the metal zinc content) ≥ 80%. Such as the use of the level GB_T_6890-2000 zinc (metallic zinc content ≥ 96%), the dry film can be converted into (or non-volatile parts of) zinc content (not the metal zinc content) ≥ 76.80%. Can also be taken as inorganic zinc (zinc silicate) primer.
5, exported to Europe and the Rope hoist to be considered harmful heavy metal coatings (such as lead, chromium, etc.) content issues, zinc-rich primer should use high purity and low heavy metal content of zinc (as zinc ASTMD520 requirements), not with lead etc. lead chrome yellow pigment.
6, the most commonly used in the paint is epoxy painted iron, because iron thin cloud is not high, such as requiring a good surface appearance, good fineness can be replaced by an epoxy.

lift hoist performance is affected by many factors

lift hoist  working conditions in complex large-scale  hoist equipment ，  the dynamic performance is affected by many factors, the motion parameters and the load can not use a simple mathematical model describes. More than ever the static design of the main limitations greatly. At home and abroad in recent years,  lift hoist  design used in the design of new dynamic simulation method, using a computer in a variety of institutional and structural conditions for movement under load condition and with time change process simulation, simulation output parameters and obtain The results, in order to estimate the actual operation and infer various data.

Ergonomics of the  lift hoist    and the operating environment to study the system as a whole, creating a human interaction with the lift hoist  best condition. Ergonomics in the application of lift hoist  is mainly reflected in the design of the cab, including the driver's cab reasonable arrangement to reduce driver fatigue and improve work efficiency of the measures to strengthen environmental protection, reduce dust and air pollution, reducing cab vibration and noise.

With the lift hoist  speed and larger, the need to further carry out the lift hoist  load variation, the dynamic characteristics and fatigue properties of. Further work on lift hoist  machine and parts reliability test research, providing lift hoist  new design methods and data. Limit state design, optimization design, reliability design, finite element method, modular design, reverse engineering design, fatigue design and robust design will be more depth and comprehensive applied.

Wire rope hoistt does not start in three cases,

Wire rope hoist can not start three kinds of situations:
(1) supply system is not on the hoist power transmission, usually with test pencil tests, such as no power transmission, power transmission, etc. after work;
(2) the main chain hoist, electrical control circuit is damaged, the line is disconnected or bad, it will not be able to hoist the motor is energized, this occurs, the need to repair the main, the control loop, maintenance, in order to prevent the main, control Loop gave power phase three-phase motors and burned the motor, or a sudden was  Wire rope hoist  motor running, cause harm, be sure to hoist the motor is disconnected from the power line, only to master, control circuit power transmission, and then move the starter and stop switches, electrical control and circuit inspection and analysis of the work on the problem of electrical or line repair or replacement, when the confirmation Lord, control circuit trouble, before re-commissioning;

(3)  Wire rope hoist  motor terminal voltage is lower than the rated voltage of more than 10%, motor starting torque is too small, so do not move goods lifting hoists, and can not work, check with a multimeter or voltage meter and other measuring motor input voltage, indeed because the voltage is too low, the motor can not be started, the need to wait for the system voltage returns to normal before using Wire rope hoist. Sometimes, hoist motor voltage is normal, while the hoist is not working, it should be considered for other reasons, for example: motor is burned, overhaul need to replace the motor; Wire rope hoist unused for long periods, poor maintenance, the brake wheel and cover rust , starting off the brake wheel is not open, the motor only issued a "hum" sound, turn it up,  lift hoist  does not work. At this time, you should remove the brake wheel, cleaning corroded surfaces, and then re-test; serious motor sweep chamber, but also make the motor does not rotate, found this situation, you should stop using the motor must be overhauled or replaced in order to ensure the normal hoist work. In addition, the production of non-overloading using Wire rope hoist, when the goods are excessively overloaded,  rope hoist  crane does not move goods, the motor will only issue a "hum" sound, rather than running, and in severe burning motor, or even cause an accident, then should immediately stop reduce the cargo, the gourd work at rated power.

For electric hoist ropes how much you know

The use of  lift hoist  rope tension between the main and sub-tower cable as a  hoist and trolley  carrying the lift hoist travel rails. For complex terrain, difficult to access the construction site, such as the low-lying areas of earthworks, dams, rivers, valleys and other areas of material handling. In between the main tower and sub-towers, Zhang set up a bearer cable, as the trolley track, traction traction cable trolley back and forth with the carrier, transporting materials. Lifting mechanism moves up and down movements of materials. Main and auxiliary tower walking mechanism, so that the primary and secondary synchronization tower along the ground track walk. Working bodies from the main tower of the cab control. In order to avoid lifting and towing cable cable interfere with each other at a certain distance in order to ride a folder to be supporting. To ride suspension clamp, tensioned between the two tower sections dedicated cable, the cable of different sizes on the order of the cable section, riding on the folder corresponding section of different size holes, a small car with spear-shaped saddle rods, When the car from the primary to the secondary tower tower when traveling trolley ride left turn to stay in the clip at each node, the lifting cable and pulling cable supporting up to ride the right folder individually be collected in spear-shaped saddle rod on. Vice-tower multi-use structure with a balanced swing weight, the bearing cable to maintain a certain tension. Dragline and cable sections are to make certain counterweight tension.

Wire rope hoist according to different requirements, sub-fixed, radiant and walking style and so on. The main and auxiliary stationary tower are fixed, operating range only along a line carrying cable. Radiant main tower is fixed, Vice tower along a circular track running, the operating range of a fan-shaped space. Walking the primary sub tower are running on the track on the ground, as shown, the operating range.

Rope electric hoist lifting a perfect signal indication and safety devices, the driver through the indoor indicator for remote control. Weight indicator can be noted in every moment of the vertical and horizontal position, even in foggy weather conditions, but also to ensure the  lift hoist  normally work reliably.

Electric hoist motor knowledge

Main  Rope hoist ，   wire rope  drum is centered at one end of the motor, through the middle of the rotating shaft, transmitting power to the other side of the reducer, reducer drive reel (or chain) wire rope electric hoist.
Electric hoist is a motor, gear and wire rope drum (or chain) as one of the small electric hoist equipment, most also with a trolley, with single girder bridge or gantry rope electric hoist, wire rope to form a complete mechanical hoist.
Now hoist motors use more conical rotor motor, this motor can power itself when braking.
1. Please use the instructions and memorize the contents of the nameplate after the operation.
2. Please, the lower limit stop block adjustment before lifting objects.
3. Electric hoist before use make sure the brake situation is reliable.
4. If it is found before the use of wire rope hoist  the following unusual circumstances, never operate.

Explosion-proof rope hoist transport system workflow

Explosion-proof  rope hoist  logistics and transport system workflow: proof rope hoist has a unique motor thermal protection device, safe and reliable. Exquisite, compact and beautiful, and very durable. Motor can be stopped automatically prevent the  load chain  beyond, to improve the safety performance. Upper and lower limit switches simple structure, reducing the minimum hook spacing. Also suitable for low space operations logistics and transport systems. And belong to a molding cast aluminum body, with a super-strength nickel-plated oad chain. Low-type rope hoist is equipped with its own security in order to ensure the development of friction clutches and upper and lower limit switches, the friction clutch to prevent overload and earth hanging when low-type rope hoist oad chain damage.

Wire rope hoist Transformers: Transformers is the use of an alternating electromagnetic field to achieve different voltage levels conversion device which transforms the voltage does not occur before the frequency changes. Accordance with its purpose can be very many, we often use is the power transformer.

Brief Introduction workflow load chain hoist

rope hoist  is a hoist and walking combined equipment, rope hoist part consists of three parts. rope hoist chain imported from  chain rope hoist accessories, hoist  load chain  procket run, easy to fall off or quit, use more secure. rope hoist body, hanging in walking small car, the car in rope hoist girders along the walking beam.  Hoist and trolley  simple structure, is a smaller conical rotor motor, gear box by a small spur gear after walking round walk. End of the conical rotor rope hoistmotor shaft splined sleeve and transmitting power to the electric chain hoist the other end reducer, through a reduction of power, delivered to the middle of the rope drum, wire rope and hook from the hoist for  Wire rope hoist  operations, such a motor with a brake function.

Electric hoist motor axis and roll Relationship

Wire rope hoist is a  hoist equipment  similar to a  lift hoist.   rope hoist to become part of the main motor, the motor axis installation There are many ways, each of which will bring different results, the next to explain.
1, the motor axis is perpendicular to the axis of the hoist drum worm gear used, the width aspect large size, bulky structure, processing more difficult.
2, the motor axis is parallel to the roll axis of rope hoist, the advantages of small size, height and length. The disadvantage is the track turning radius.
3, the motor mounted on the inside of the drum hoist, and its advantages for the length of the small size, compact structure. The main drawback for the motor cooling conditions are poor, poor grouping.
4, the motor mounted on the outside of the drum hoist, the advantage of the group is good, high level of generalization, lifting height is easy to change, easy installation and maintenance. Often used as a general way the motor is mounted on the roll axis outside.

Electric hoist module design benefits

lift hoist structure should be able to meet a variety of conditions, low headroom, dual suspension mounting points, and so many ways; insulation type can be remotely controlled, corrosion proof, high temperature heat, explosion and other features of the product.

Shape design to change the traditional circular design, with a square structure, modular design, increasing the versatility of parts, arranged side from the original one in the middle of the motor shaft, a reducer, is conducive to effectively improve the  wire rope hoist  lifting height, and avoid high-speed shaft axis drive, can improve the smooth running and reliability.

Increase the magnification range of pulleys, improve range of stand-alone use. Using high-quality high-strength steel wire rope, wire rope diameter decreases, the use of compatible diameter rope drum diameter ratio, diameter and wire rope and pulley diameter ratio, in order to facilitate the whole structure and reduced weight.  Rope hoist  increased electrical protection measures, in addition to the upper and lower limit protection, it should also increase the overload protection; wrong phase, phase, voltage protection; hook retaining rope protection.

Brief Introduction hoist generic workflow

By use of  rope hoist ，  rope hoist can be divided into general and special hoist two, two kinds of rope hoist works as follows:
1, first start the motor, the weight rises from the proper height
2, and then transported to the location specified weights, running the car in the lower edge of the beam-beam single walk.
3, using a motor drive when walking on both sides of the wheel trolleys.
4, lifting mechanism set up an electromagnetic brake.
5, electromagnetic circuits and rope hoist motor circuit in parallel, so that the electromagnetic brake Hoist and trolley.
6, the  Wire rope hoist  for lifting objects generally installed in the lower part of the roll up stopper.

Master control loop electrical damage to the electric hoist impact

wire rope hoist at work will usually be some failures, there will mainly introduce the cause of the malfunction. When the hoist Lord, electrical control circuit is damaged, the line is disconnected or bad, but also make wire rope hoist motor phase does not work, this phase is missing, the need to repair the main, the control circuit maintenance, in order to prevent the Lord, three-phase motor control circuit to give power to the motor phase and burned.

Hoist motor terminal voltage is lower than the rated voltage, motor starting torque is too small, so do not move goods lifting  lift hoist  , and unable to work. Abnormal noise occurs in the control loop, making noises, typically contactor fails to deal with fault contactor maintenance, overhaul can not be replaced. Motor makes any abnormal noise, immediately stop and check whether the motor running single phase, or bearing damage, coupling axis errors and "sweep chamber" faults, abnormal noise from the gearbox issue, reducer fails, then should stop examination, first determine the reducer gearbox or bearing on whether to raise the oil prior to use, whether to use periodic oil change. wire rope hoist long-term application, the brake ring wear is too large, the brake spring pressure decreases, the braking force is reduced.

Should first check to use wire rope hoist is overloaded, overloading the motor heat, long-term overload will burn motor; motor is not overloaded, still hot, you should check whether the motor bearing damage; should also check whether the motor is required duty work, which is caused by electrical heating One of the reasons, should be used in strict accordance with the motor duty work. Weight rose to the air, check the system voltage is too low or fluctuating too large, this kind of situation is generally contactor contact welding, when you press the stop switch when the contactor contacts can not be disconnected, the motor was as usual power operation,  lift hoist  without stopping; into extreme positions such as limit malfunction, Hulu does not stop. This happens, immediately cut off the power, the gourd forcibly stop. Winter construction, the circuit still can not start the motor without failure, the reason is the brake ring freezing.

Brief Introduction proof Rope hoist electrical system operation

Explosion-proof Rope hoist electrical system
Explosion-proof  Rope hoist  electric device consists of explosion-proof electrical control box, explosion-proof and explosion-proof control button stopper components. Electronic control system for the control box and cables, flashlight, doors and other parts. Operation button box is usually supplied with control box can also configure Italy and other special requirements imports flashlight door. Explosion-proof Rope hoist safety device, mainly referring to the circuit limiter, commonly known as the stopper off the fire, limiting the upper and lower limit position. wire rope hoist  can also be configured: display or not overload limiter; increase hammer-type double cap positioner; increase the phase sequence protection; adding a second brake, so as to adapt the work places particular importance. Electrical control and operation of a safe voltage. Off the fire stopper should not be used as a limit switch frequently.
Explosion-proof Rope hoist correct mode of operation
1, the switch "on" action hanging gourd fall until the limit switch so far.
2, press switch "down" until it is fully retracted chain bag chain, and the motor stops.
3, check the  load chain  orientation purposes, all welding point in the same direction should be fully correct operation.
4, when the host of the number of pairs of  load chain  hanging chain or chain, is strictly prohibited under the hook from the chain flipped.

Electric hoist comprehensive direction

   In the  rope hoist  single automated basis, through a computer to compose a variety of material  Hoist equipment  integrated material handling system, through the control of the central control room, with the combination of the production chain hoists equipment, coordination with the production system. Such lifting hoist high degree of automation, with information processing functions, the sensor can be detected by the implementation of a variety of information storage, arithmetic, logical judgment, transform treatment process, and then issue control instructions to the implementing agencies. Such lifting hoist also has good information input and output interfaces, to achieve all information, accurate and reliable material handling systems in the entire transmission.

   Lifting hoist through system integrators, can form different models of the best match and mix each other, play the best effect. There are currently focusing on the development of the plant handling automation systems, commercial cargo delivery distribution systems, container loading and unloading systems, transport and telecommunications sectors parcel cargo handling system with automatic sorting.

   U.S. production of construction machinery Caterpillar Company purchased a metal structure factory overhead crane with electric hoist-based automated material handling systems for steel shot peening, automatic cutting and out of storage for automatic handling and transportation operations, than the original Stand-alone operation using the work efficiency of 65%. Toshiba Bang Kawasaki plant uses the automatic bridge crane hoist consisting of a flexible material handling system to carry the fixture and the workpiece processing line for transporting the machine or to be rough machined parts to the next process or warehouses. These moves through space handling  Hoist and trolley  on the ground instead of in the past usually automatic guided truck driving, make the workshop floor space to be fully utilized.

Electric hoist hook safety inspection standards

1 human-powered  lift hoist  with hooks to 1.5 times the rated load as proof load test.
2 power-driven  rope hoist  lifting mechanism with hooks to two times the rated load as a test load test.
3 hook lifted after test load should not have any obvious defects and deformation, the opening degree of the increase should not exceed 0.25% of the original size.
4 inspection of the  lift hoist  hook, the hook should be low stress areas in the marking, including the nominal weight, factory standard or the trade name, inspection mark, production number and so on.

With electric monorail monorail car

Monorail electric vehicle safe to use, easy to maintain, compact structure, small size, easy to adjust spacing monorail car wheels, suitable for a variety of beam.  Hoist and trolley  and push monorail and Hand monorail car different, it is driven by the motor, the electric sports car walking on the beam at the lower edge of the track, together with the  Rope hoist   or  manual hoist  may form a bridge, a single beam or cantilever cranes, electric monorail is more labor-saving convenience.
Monorail car left and right wall hinge connection, under the action of gravity, can adjust the height of the four wheels by force. Monorail: break up the implementation of two kinds of cars and hand lane, hand lane to drive bracelet, hand-launched vehicles in order to push heavy lifting driver can freely walking on the beam bottom flange on the rail, and the wheel rim spacing can be adjusted by I-beam track width requirements, the manual hoist hanging in the road below, can be composed of manual lifting and transport trolley.
Widely used in factories, mines, docks, warehouses, machining, injection molding, die casting, stamping, die clamping, construction sites and other machinery and equipment for the installation, lifting goods occasions.

Manual hoist installation and maintenance skills

  After finished using  Chain Block   hoist should wipe the dirt and store in a dry place to prevent damp rust and corrosion. Manual hoist mechanism should be familiar with each year who cleaned with kerosene parts, gears and bearings in part, add grease lubrication, to prevent not understand the principle of free disassembly gourd performance.
    chainblock  gear mounting, use two tablets teeth "0" word mark installed on the same line. About lifting sprocket roller bearings, can adhere to the butter has been pressed lifting sprocket mounted on the inner ring journal, re-siding bearing outer ring. Install brake parts, pay attention pawl portion engages a good spring pawl control should be flexible and reliable. Started sprocket chain hoists installed after the wheel clockwise bracelets should ratchet friction plate is pressed against the brake seat, counterclockwise rotation bracelet wheel, ratchet and leave space between the friction plate. Rod and the right wall of static coordination, maintenance, do not disassemble.

After cleaning overhaul chain hoists, load and overload tests should be performed to confirm normal operation before use.
manual hoist during refueling and use, brake friction surfaces must be kept clean and regularly check the brake performance, to prevent brake failure caused by heavy objects from falling. In order to maintain and easy removal, hand chain in which a series opening chain (not welded, painted color).

Electric wire rope hoist transformation process

 1,  Wire rope hoist  structure should be able to meet a variety of conditions, such as: low headroom, twin-lift and other mounting methods; wire rope electric hoist can be remotely controlled insulated, corrosion proof, high temperature heat, explosion and other functionality.
 2, wire rope hoist design changes the traditional round shape design, wire rope electric hoist with a square structure, modular design, increasing the versatility of parts, cloth manner conducive to effectively improve the wire rope electric hoist lifting height, and Avoid high speed shaft axis drive, can improve the smooth running and reliability, reduce manufacturing costs. Electric wire rope hoist pulley ratio increases the scope and improve the range of stand-alone use.
 3,  wire rope hoist  rope made of high quality high-strength, tensile strength to meet the safety factor of the premise, to minimize the wire diameter, wire rope electric hoist drum adapted to diameter ratio of the diameter of  rope   wire rope and pulley diameter diameter ratio, in order to facilitate the whole structure and reduced weight.
 4,  Rope hoist  increased protection measures, in addition to the upper and lower limit protection, it should also increase the overload protection; wrong phase, phase, voltage protection; hook retaining rope protection. Development of multi-rope hoist brake function models, such as: double brake, three brake. Electric wire rope hoist according to user need to increase the lifting height, load digital display.

Monorail Use Precautions

Do not overload monorail use. Monorail hoist and trolley  lifting weights, forbids any person to walk or work under heavy loads. Monorail when lifting heavy focus on the beam within the plane of the web, do not lift. Monorail  hoist and trolley  operation should force the bracelet hand load chain  wheel center plane, shall not be stayed. In cases where the hand-pull monorail exception, must not jerk, you should immediately stop using, check the reason.  Hoist and trolley  surface regularly gears and filling oil, and check the fasteners loose. Monorail beam TROLLEYS is working to support, so deformation, distortion, cracking, or do not meet the criteria and have other defects on the beam for single-track lane.

Electric chain hoist load and mode of action

wire rope hoist loads Meaning is electric chain hoist in the job, load bearing species complex loads in a different direction, not only in running electric chain hoist should be included static load, dynamic load, alternating loads, etc. The role of various loads, and with electric chain hoist operation conditions change, even if the load is also shown similar characteristics varied. Subject to the  Hoist equipment  of the load bearing parts and the structure will produce the corresponding stress and deformation, when the stress and deformation exceeds a certain limit, it will make zero, component loss of function, or even destroy, dangerous. Electric chain hoist crane load calculation and its components is zero, unit, component stress analysis of the original basis on which the retirement or cause of the accident analysis to determine the important basis. Load state judgment was accurate or not, will directly affect the results and conclusions of the accident is correct or not. Therefore, we need to understand the load on the crane species, the role of various loads as well as in the direction of the mode of action of different load conditions.
1 dynamic loads dynamic loads that electric chain hoist generated when the state changes in motion Dynamic Effects, dynamic load effects so that the original value of the static load increases. Dynamic loads including variable motion, the structure and weight lifting load inertia loads generated; After the wheel is not flat track adapter, or moving parts of the crane buffers the impact shock loads; inertial loads and impact loads, metal structure and working mechanism of elastic system vibrates the vibration loads, etc..

Dynamic loads and operating speed (acceleration), but not with the direction of movement, but not with the structure of the form and nature (such as the mass distribution of the system, the system stiffness and damping, etc.) related to the conditions of use and the crane driver operation method, operating skills proficiency and other factors.
2 electric chain hoist gravity loads gravity loads include weight lifting loads and loads of two parts. Weight loads include crane metal structure, mechanical equipment, electrical equipment, etc. (not including lifting load) gravity loads. Mode of action of the load and simplify the mechanical model can be considered separately, under normal circumstances, crane machinery and electrical equipment can be considered as concentrated loads on the equipment installation location center truss weight acting on the structure as a concentrated load on the node , box-type structure as a uniform load weight handling. Lifting load hoisting means all gravitational mass, including allowing the maximum effective lifting goods, extract device, suspension flexible member and other lifting devices in gravity. When lifting height of less than 50 meters, weight lifting  wire rope  can be neglected. When the electric chain hoist machine in a non-stationary state of motion, ie, electric chain hoist is not working, or hanging out stops movement at the state
of suspension in the air, or electric chain hoist uniform motion in a steady state, the electric chain hoist Lifting the weight of the load and the load can be treated as a static load.
3 Natural Natural loads which loads the wind, ice, snow, earthquakes and temperature changes caused by natural factors such as load. Work outdoors electric chain hoist, wind loads on the impact of lifting operations should be given adequate attention.

Electric hoist common troubleshooting questions

1, press the start switch  Rope hoist  does not work
Mainly because the  rope hoist  did not turn rated working voltage, which led to not work, generally have the following three conditions:
(1) is not energized. Power supply system for electric hoist power transmission, usually with test pencil tests, such as no power transmission, power transmission, etc. after work.
(2) phase. Hoist the main, the control circuit of electrical damage, the line is disconnected or bad, but also make hoist motor phase does not work, this is the case, the need to repair the main, the control loop, maintenance, in order to prevent the main, the control loop to give Three-phase motor power phase while burning motor, or a sudden was electric hoist motor running, cause harm, be sure to hoist the motor is disconnected from the power line, only to master, control circuit power transmission, and then move the start and stop switch Check electrical and circuit analysis and control of the work, to have electrical problems or line repair or replacement, when the confirmation Lord, control circuit trouble, before re-commissioning.
(3) voltage is low. Hoist motor terminal voltage is lower than the rated voltage of more than 10%, motor starting torque is too small, so do not move goods  lift hoist   and can not work, check with a multimeter or voltage meter and other measuring motor input voltage.
2,  wire rope hoist  abnormal noise when running
Many electric hoist failure, such as control of electrical appliances, motor or reducer failures, often accompanied by abnormal noise, the noise level of the position and not with the cause of the malfunction and sound different and have different, overhaul, to see and hear more, You can use the sound characteristics according to the fault or determine beep location, locate and repair faults.
(1) abnormal noises occur in the control loop, issued a "hum" noise, usually contactor malfunction (such as AC contactor contacts being exposed, the voltage level does not match, the core was stuck, etc.) to deal with fault contact with device for repair, you can not repair must be replaced after processing, self-noise elimination.
(2) motor makes any abnormal noise, immediately stop and check whether the motor running single phase, or bearing damage, coupling axis errors and "sweep chamber" faults, these will make the motor abnormal sound, the sound of a different fault location and the level and tone a difference, single-phase operation, the entire motor makes regular suddenly strong suddenly weak "buzzing" sound; while the bearing is damaged when the bearing near the issue along with the "thump - thump" of the "buzz" sound; while coupling axis errors, or when the motor slight sweep chamber, the entire motor makes high "buzzing" sound, not when accompanied by a shrill voice. In short, the difference should be based on the noise, to find fault, for itemized repair and restore normal performance of the motor when the motor fault untreated, prohibit the use of gourds.
(3) abnormal noises issuing from the reducer, reducer failure (such as lack of lubrication or bearing gearbox, gear wear or damage, bearing damage, etc.), then should stop to check, first determine the reducer gearbox or bearing added prior to use lubricating oil, lubricating oil use is changed regularly, if not required lubrication, reducer will not only generate excessive "buzzing" sound, but also excessive wear or damage to the gears and bearings.
3, fell down when braking distance exceeds requirements
Electric hoist long-term application, the brake ring wear is too large, the brake spring pressure decreases, the braking force is reduced. The workaround is to adjust the brake bolt or replace the brake ring.
4, the motor temperature is too high
Should first check the hoist is overloaded with overloading the motor heat, long-term overload the motor will burn; motor is not overloaded, still hot, you should check whether the motor bearing damage; should also check whether the motor is required duty work, which is caused by the motor heat One of the reasons, should be used in strict accordance with the motor duty work. The motor is running, the brake gap is too small, not fully disengaged, have a great friction, friction heat, while also representing an increase of additional load, the motor speed is reduced, the current becomes large fever, you should stop working, re- Adjust brake clearance.
5, the weight rose to the air, can not re-start after stopping
First check whether the voltage is too low or fluctuating system is too large, the case of such a situation, only the other voltage returns to normal after the start; hand, we should pay attention to the three-phase motor operation phase, after the shutdown can not start, then you need to check Power phase.
6, you can not stop or to limit position remains Parking
Such situation is generally contactor contact welding, press the stop switch when the contactor contacts can not be disconnected, the motor running as usual energized, hoist without stopping; into extreme positions such as limit malfunction, Hulu does not Parking. This happens, immediately cut off the power, the gourd forcibly stop. After stopping, repair contactors or stopper, serious damage can not be repaired and must be replaced.

Electric chain hoist in a variety of environments how to properly care

Wire rope hoist in a variety of environments proper maintenance methods:
 1 electric chain hoist gear box oil from the commencement of the operation of 500 hours, please check the engine oil level is adequate, regularly check the oil after the first

three months of the case, less need to refuel. (Top gear rings for the filling hole, unscrew the screws underneath the vent hole, side hole for the full bit)
 2 outdoor use electric chain hoist should be erected rainproof devices.
 3 keep electric chain hoist parts dry operation when you're finished Chinese gourd leave wet areas, high temperature or chemical areas in order to maintain its performance.
 4  load chain  maintenance, please visit the chain oil lubrication, oil on high dust plant please and periodically clear the limits of the chain and the guide groove foreign body

within the group to ensure the smooth operation of the chain.
 5 Long-term does not use  rope hoist  should be rust treatment and cleaning and maintenance, and run up and down for 1-3 minutes in order to maintain its performance.
 Note: Foundries load chain , can not be on the oil, because of dust on the chain for wear resistance.

Cranes equipped with safety devices which

To ensure safe and reliable lifting operations,  hoist and trolley  equipped with a better safety devices in order to unexpected circumstances, play a protective parts or alert the operator, and thus play a security role.
  A hydraulic system, the pressure relief valve: inhibit loop abnormally high pressure in order to prevent damage to the hydraulic pumps and motors, and to prevent is overloaded.
  2 luffing jib safety device: When the unexpected accident, boom luffing cylinder loop pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from work oil, the boom will not fall, thereby ensuring the safety of operation.
  3 telescopic crane safety device: When unexpected accidents, telescopic boom cylinder circuit of the high-pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from the working oil, the suspension will retract themselves, thus ensuring the safety of operation.
  4 height limit device: hook up the required height to rise after touching limit hammer, turn the trip switch, "over round" indicator light that is bright, while cutting off the hook lifting, boom stretched out, hanging Arm volts to the operation of such action to ensure safety. Then just manipulate the hook down, boom boom retracted or looked up (to the Security side operation), etc. handle, lift the weight limit constraint, the operation returns to normal. For special occasions, such as still need to make a small amount of over-winding operation, press the release button on the meter box, this time limit will be lifted role, but this time the operation must be very careful to prevent accidents.
  5 leg locking device: When unexpected accident occurred, leading to the leg vertical cylinder hoses or tubing rupture or cutting, the hydraulic system can be disabled with a two-way hydraulic lock cylinder two leg  Manual block  pressure oil chamber, the branch Notations or throw the legs, thereby ensuring the safety of the lifting operation.
  6 from the weight indicator: Starting weight indicator is set in the basic arm together side (ie, the right side of the cab), the operator sitting in the control room can be clearly observed, can accurately indicate the boom elevation and the corresponding conditions allow  hoist equipment  rated capacity.
  7 Lifting Characteristics Table: Set in the control room on the front side of the lower wall, the table lists the various arm lengths and a variety of work rate and the nominal weight lifting height for operation inspection. Lifting operation, must not exceed the values  specified in the table.