cheap Wire rope hoist part are

Wire rope hoist part are: motor, transmission, drum and sprocket to the mutual position of the motor and the reel can be broadly divided into four different types.Initial installation or reassembly Wire rope hoist,motorized chain hoist  no-load operation should be carried out operations, but to ensure that the components to be installed, do not energized.Wire rope hoist is a small wire rope hoist lifting equipment,Chain block with a compact, light weight, small size, parts versatility, easy operation, it can be installed separately on the beam, can also be installed used on electric or manual single-beam, dual-beam, cantilever, gantry cranes.hanging objects tied, hanging strong or imbalance may slip, not for lifting operations are not padded edges between objects and cheap wire rope hoist. Unable to see the sites,electric hoist and trolley not for lifting operations suspended matter the situation and command signals. In stoppage or rest, get the hanging objects, hanging baskets, spreader and cable hanging in the air.

Proof chain hoists maintenance skills

Proof chain hoists as a variety of flammable and explosive environments more specific proof of a lifting tool, its daily maintenance and maintenance are particularly important:
1), the proof  chain block   and driving after use, should pay attention to clean hoists and monorail car explosion dust on some miscellaneous debris, and promptly coated with anti-rust oil, stored in a dry place to prevent rust and corrosion from moisture .


2), the daily checks and more should pay attention to maintenance, maintenance and repair should be familiar with chain hoists and driving agency personnel, non-performance of the machine do not understand the principle of free disassembly. Cleaned with kerosene or other media-proof chain hoists and other mechanical parts, gears and bearings in the rotation or friction parts, filling grease lubrication.
3), the assembly, the proof  manual hoist  lifting around sprocket roller bearings, can adhere to the butter has been pressed lifting sprocket mounted on the inner ring of the bearing journal, and then into the wall of the bearing outer ring inside.
4), proof chain hoists brake friction surfaces must be kept clean. Brake parts should be inspected regularly to prevent brake failure occurred weights from falling accidents.
5), the installation brake parts, pay attention with the pawl ratchet pawls engage alveolar good spring pawl control should be flexible and reliable, installed after the chain started, bracelet wheel clockwise, it will be a ratchet, pressed on the brake friction plate seat,wire rope winch counterclockwise rotation bracelet wheel, ratchet gap should be left between the friction plate.
6), and explosion-proof chain hoists TROLLEYS (small car) After cleaning and maintenance after the load test should be carried out and glide down experiments confirmed working, reliable braking before delivery.

Use explosion-proof chain hoists inspection before

1 explosion-proof  chain block   chain lubrication before using hook method to squeeze into the oil, oil-based lubricants name is calcium; biannual lubrication time.
2, the proof chain hoists lifting parts before checking intact, transmission parts and lifting chain oiled, idling normally.
3, lifting chain surface if worn, scratched traces strictly prohibited.
4, proof chain hoists lifting heavy objects when operating from the ground to try to check the work before it can continue normal operation lifting.
5, explosion-proof chain hoists rise and fall distance must not exceed the height marked to prevent damage to components.
6, Do not use non-manually driven  rope hoist  lifting heavy objects, if not pull movable weight situation, not afterburner.
7, proof chain hoists should check whether other heavy weights have been implicated, the weight is beyond the rated capacity, hoist parts for damage or other abnormal conditions.
8, the operator standing ban on the operation of  manual hoist  lifting weights, weight lifting may not be vacant after leaving the job site

High-temperature environments hoist Precautions

1, the operation of electric hoist cab shall be closed, but it should be equipped with fan or air-conditioning.
2, the motor windings and the cabinet should be buried thermistor temperature control device,hoist and trolley when the temperature exceeds a certain limit, the power to protect or stop the motor strong cold additional measures.
3, with the upper limit dual limit function. The first limit is weight limit, the second limit of conventional electric hoist upper and lower limit stopper off the fire.
4, high temperature insulation protection, electric hoist drum shell in the design and installation of the machine below the heat shield to isolate the molten metal heat radiation.
5, lifting the motor and run the motor insulation class Class F and lifting the motor windings built with overheating protection device.
6, rope configuration metallurgy occasion dedicated high strength high temperature resistant wire rope.
In addition to these high-temperature environment precautions,lever hoist the electric hoist fundamental issues should also be noted, do not overload the use, the use of the hoist Please read carefully before using the instructions and precautions.

Electric hoist more widely used in the field of environment, under normal circumstances the ambient temperature between -20 ℃ ~ +40 ℃,chain Block but with the expanding range of use in many high-temperature environments hoist pay special attention to the following matters:

How to detect whether the purchase of qualified electric hoist

For now, electric  wire rope hoist  and other products on the market increasing variety of standard models, more unscrupulous traders refurbished goods traded, the most lifting equipment, the importance of safety can be imagined, then how to detect whether we are qualified to buy electric hoist You can be judged according to the following conditions hoist whether the target:

1, under the hook devices should hoist electric hoist rated capacity marked words and content, under the direction of the hook to be able to rotate 360 degrees and flexible steering.
2, if the electric chain  lever hoist, lifting chain then it should not be less than GB/T10051.1 requirements. Lifting chain guide should be installed on the chain and sprockets and cruises normal lifting engagement play a supporting role. Lifting chain from one end of the force shall be provided to prevent the crane from the lifting chain sprocket overwinding limiting device.
3, wire rope electric hoist electric hoist to adopt cone. Electric chain hoist motors to AC induction motor. Thermal insulation of the motor mechanism is not less than B grade classification. Motor protection and other provisions not less than GB/T4942.1 IP rating. 6 electric chain hoist motor winding on the metal casing shall withstand withstand voltage test 1 minute without the risk of insulation breakdown.
4, for the rated power less than 1.1KW motor,chain block leakage current during the test should not exceed 10 mA, for rated power greater than 1.1KW motor, leakage current during the test shall not exceed 20 mA.
5, at rated voltage, rated frequency and no-load state, the three-phase motor phase current in any one phase and three phase deviation should be less than the average of the three-phase average.

Proof chain hoists generally be checked from the following aspects

Proof chain hoists can be widely applied potential fire and explosion hazard environments,wire rope hoist explosion-proof hoist products in the course of friction between the impact will not generate mechanical spark, can effectively prevent fire accidents, explosion-proof chain hoists chain hoists as ordinary to assume the load carried, but in addition it also combines proof performance, so in the procurement must be careful to distinguish, have avoided due to product quality problems caused by worries generally be checked from the following aspects:
An explosion-proof chain hoists External:
1) Check-proof chain hoists structure,chain block product specification
2) Check the appearance of the coating quality chain hoists.
3), first check whether the appearance of damaged, try to handle zippers, listening to the sound is crisp, with or without blocking other phenomena, whether wrapped chain breakage.
4), proof chain to chain pull down smoothly, you must lift freely;
5), proof chain hoists shall be provided with a hook at the slip, anti-off devices.
6), check the chain hoist hook assembly for wear and so on.
7), explosion-proof chain hoists and load-bearing chains, hooks and other parts in the national standard bearer security timer will occur under load deformation and cracking, etc.;
8), explosion-proof chain hoists lifting the ground at the time of sediment, to try to avoid sediment into the bearings,lever hoist worn rollers affect life expectancy.
Second, the proof chain hoists inside:
1), the material should be copper alloy explosion-proof material
2), proof chain hoists internal gear and the shaft is not in place by the quenching, resulting in broken teeth does not rise or fall.

Affect the price of the main factors hoist

     In recent years, the rapid development of electric hoist enterprises to major hoist increasingly fierce competition between companies,wire rope winch faced with a variety of model specifications on the market of electric hoist, the same products in the price is also quite different, then what factors electric hoist price differences, the following according to the current market situation, summed up the following for your reference:
       First; accompanied by the development of technology, new products, new technology is always the pursuit of each enterprise, in order to improve their own strength, electric hoist update production equipment is essential, vigorously develop new electric hoist, thus increasing the cost of production inputs, which are electric hoist prices an important factor.
       Secondly; With the steel market prices continue to rise,load chain a direct result of the rise in raw material hoist, electric hoist resulting price increase.
       Finally; lifting an increasingly competitive industry, electric hoist manufacturers endless enterprises to ensure the quality of the premise, to provide quality services, to a certain extent, also the electric hoist prices growth.
       The above three points are rigid hoist the main factor prices, once again reminded the majority of new and old customers to buy other small electric hoist lifting equipment when not too much emphasis on price,chain block product quality is one of the fundamental safety.

Electric hoist motors appear unbalanced three-phase power causes

  Most electric hoist three-phase voltage is used,chain Block but the process of using some of the fault is due to current imbalance caused, then the motor appears unbalanced three-phase power What is the reason, how should we avoid such failure causes electric hoist it ?
       When the basic symmetrical three-phase power, the asynchronous motor at the rated voltage of the three-phase load current, any one phase and the average deviation of not greater than the average of 10%. Therefore, only the three-phase voltage imbalance is too large, or electric  lift hoist  motor itself in case there is a fault, the motor phase current imbalance will appear.load chain The possible reasons are:
       1, three-phase power supply voltage unbalance caused by electric hoist motor phase current imbalance.
       2, the motor windings shorted.
       3, the inner part of the stator winding coil reversed.
       4, the three-phase windings of the motor are not equal.
       5, the winding circuit.

Chain hoists accident prevention

chain Block consequences of the accident, personal injury, equipment, facilities, damage to the degree of risk hazard class II critical preventive measures
1 work should concentrate, to observe, to rational operator;
2 before each use to make the necessary checks;
3 chain hoists are complete and secure;
4 seriously study the working principle of chain hoists and handling precautions;
5 using chain hoists lifting when setting the necessary precautions around;
6 immediately after use equipment maintenance,wire rope winch stored in a dry place to prevent moisture rust and corrosion;
7 do not know who banned performance  lift hoist s free disassembly;
8 brake friction surfaces must be kept clean;

Buy electric hoist should be noted that six basic parameters

     The use of safety-critical electric lift hoist , electric hoist in addition to strictly consider buying gourd quality and after-sales service, but we need some basic knowledge of electric hoist is understood that in the time of purchase to facilitate our use of the environment according to their own choice suitable products, the following introduces you to buy electric hoist should be noted that six basic parameters:
1, Installation: hoist into electric trolley and fixed, fixed can be divided into fixed (A1) and lower fixed (A2), to choose according to the actual situation of the electric hoist installation.
2, I-beam hoist hook to the bottom center:chain block electric hoist purchase should pay attention to the spacing between the upper and lower hook, because in certain plant would hoist hook spacing specific requirements.
3, voltage: electric hoist Because in all walks inside, using the voltage is not the same, there are 380V 220V China industrial electricity consumption, and even 440V, 60HZ, 380V, 60HZ series of non-standard power supply.
4, motor power: Different electric hoist motors are not necessarily identical, the same 10t electric hoist motor is also possible that 13KW or 7.5KW.
5, the lifting speed: Average electric  rope hoist  lifting speed is divided into single-speed (8m/min) and dual-speed (8/0.8m/min) two kinds, generally no special requirements are often used in the case of single-speed electric hoist (ie CD1-type), if your condition requires heavy lifting required to pinpoint the course of the case, easy to use two-speed electric hoist (ie, MD1 model).
6, lifting height: electric hoist as a promotion tool, would lift height has strict requirements. So buy electric hoist, you should first select according to plant height of lifting height, the conventional lifting height has 6,9,12,18,24,30 m, special occasions, according to user requirements for non-standard design.

How to choose and use a sling

1, a sling specifications, selection of the type specifications when choosing a sling, lifting loads must be the size,chain block weight, shape, and ready to adopt the combined effect of the lifting method is used to consider factors included in the calculation, to out of the limits of the work force requirements, work environment, the type of load must be considered. Must select both adequate capacity, but also to meet the proper way to use the length of the sling, if multiple sling used simultaneously lifting the load, you must use the same type of sling; flat sling material can not be influenced by environmental or loading effects. Whether or soft attachment lugs need to be carefully considered in the last paragraph sling and lifting equipment and auxiliary accessories to match.
2, restricting the use of the sling angle when using soft flat sling hanging ears, the minimum length can not be used lug lug less than 3.5-fold and the maximum thickness of the contact portion of the hook and hanging ears activities should not exceed 20 ° angle . When connecting with soft slings and lifting lug appliances, the slings and lifting equipment has been in contact part must be, unless the axial width does not exceed sling 75mm, lifting attachments bending radius must be at least sling 0.75 times the axial width. For example: in the cargo hook sling at least 0.75 times the radius of the axial width of the sling. Fabrics of a width which may be part of the cargo hook radius of influence, cargo hook curvature strongly influence the outcome hinder the width of the fabric balanced role.manual hoist Do not overload slings must be used in the right way coefficient, some way limit the work force may have been given on the label, multiple combinations and vertical slings must not exceed the maximum angle.
3, following a good experience in lifting before the planned start lifting and light lifting operation of the program.
4, lifting, the correct use of sling sling connection correctly in safe mode, placement, connected load, must be placed in a sling so that the load can balance the load on the role of sling width; still can not tie a knot sling suture site or distortion can not be placed on a hook or lifting device, and the upstanding portion sling always placed through away from the load, the hook and the locking point to prevent damage to the label.
5, the use of multiple combinations sling sling precautions multiple combinations limits the assessment of the work force depends on the combination of sling load-bearing symmetry, that is, when lifting, sling branch distribution symmetrical uniform according to the design, with the same vertical angle. 3 combined slings, if the branch is not uniform according to the design of the force, the maximum force on a branch, that branch would be designed to withstand the maximum power point close to the sum of the results of the same composition in the sling 4, if not rigid load , will also be counted. Note: For rigid load, most of which three gravity might be, or even two commitments that support only the remaining balance of rotating rings protect the load
6, when lifting, the protective sling sling away from sharp edges, friction and wear, or whether it is away from the load-lifting equipment, should be appropriate to strengthen and protect the sling portion of sharp edges from damage and wear, the necessary additional strengthen the protection of supplementation is necessary.
7, to ensure that lifting the load balancing in the lifting process, we must adopt a safe way to use slings, can not allow the load to tilt or fall from a sling; must arrange slings and lifting the load's center of gravity directly above the point, Let load balance, stability, if the load center is not under the lifting points, the movement crossed the sling may focus. Dangerous.
8, using the lifting sling way if you use hanging baskets, you can ensure that the load secure,manual block because there is no lock hanging like that kind of locking behavior, and you can flip through the sling from the focus, it is recommended to use together with two slings, sling limbs hanging vertically as much as possible, help to ensure equal load sharing between branches. When the lock hanging flat sling, it should be placed to allow natural angle (120 °) of the state, thus avoiding heat generated due to friction, sling neither by force is powerful position, nor an attempt to create a tight jaws, the correct safe way using a sling hanging double lock. Double lock hanging to ensure safety and prevent the load from sliding off the sling.
9, to ensure the safety of personnel in the lifting process, pay close attention to ensure the safety of personnel, must warn personnel in hazardous conditions, if necessary, to withdraw immediately from the danger zone. Hands or other body parts must be kept away sling, sling to prevent relaxation when hurt.
10, in the lifting process, must be exemplary manner must be exemplary lifting hoisting sling to pick up the slack from the sling taut until the load is gradually raised to a predetermined position, particularly important in hanging baskets or freedom taut friction bear the load.
11, controlling the rotation of the load if the load tends to be tilted down the lifting objects to ensure that the load is constrained to prevent accidental rotation of the load is ensured.
12, to avoid collision rigging, drag, friction, vibration, rigging to prevent damage to the ceiling must be taken to ensure that the load is restrained to prevent accidents and other objects flip or collision. Avoid dragging, pulling or oscillation load, if that will increase the Caucasus with the force. If the rigging to withstand the load, or load on the pressure in the rigging, it is not on the ground or rough surface drag sling.
13, rigging landed When lifting, the load in the case of equality constraints landing.
14, the correct storage sling when the sling after completion of lifting operations must be put back in the proper storage; if no longer in use, must be stored sling in a clean, dry, well-ventilated conditions at room temperature, and put on a shelf, away from heat, can be eroded appearance gas, chemicals, direct sunlight or other strong ultraviolet radiation. Priority storage items, you must check sling occurred in the course of any damage, not the store have been damaged sling. When lifting, the sling pollution by acid diluted with water or with the appropriate storage media in advance is recommended to neutralize. Lifting slings based on the chemical properties of materials and related reference to the recommendation from a supplier, we have already used the product in question is not perhaps be necessary. Sling in use becomes wet, or because of clean reasons, will be hung up to dry naturally.

Periodic examination of special equipment

(A) Conditions
Special equipment for periodic inspection, in addition to the necessary equipment ready for data, but also should have the following basic requirements:
1 was seized equipment in accordance with the provisions of the clean-up, costumes, media drained,chain block and with other related equipment for the reliable isolation;
2 containing flammable, toxic equipment for the replacement, and, disinfection, cleaning, and maintaining of qualified;
3 need to open, disassemble, has been completed in accordance with regulations;
4, high-temperature cooling device has been reliably meet the conditions of work;
5. Need to set up quarantine, isolation has been carried out, and set up safety signs;
6 Prepare the required power, water and other energy sources;
7 Determine the coordination and monitoring personnel, security measures.
8 large equipment on larger quantities or periodical surveys, you need to set the scene inspection office space should be provided office space.
The establishment of specialized inspection and testing base for mobile devices periodic inspection, and its preparation work is generally carried out by the inspection agency, applicant be required.
Specific conditions and requirements, see special equipment associated periodic inspection rules of technical safety.
(Two) Implementing Agency
AQSIQ approved special equipment inspection and testing organizations.
Specific implementing agencies by the State Administration of Quality Supervision, Provincial Quality and Technical Supervision plan to the public.
(Three) Program
Periodic inspection including application of special equipment, periodic inspection,load chain an inspection report and other procedures:
1 Applicants
The use of special equipment should be in accordance with production units and equipment, regular inspection cycle, make arrangements for inspection plan and the tax return (on relevant sites download), apply to the inspection and testing institutions, return the device at the same time submit registration authorities.
(2) accept
Following a review of inspection and testing agency qualified to be accepted, arrange inspection and notify the applicant; does not comply with the conditions of, and the reasons inadmissible.
3 periodic inspection
Site inspection, the use of units shall be equipped with personnel monitoring and coordination, and prepare the following information:
(A) equipment archives;
(2) equipment operation, maintenance and other records.
Inspection agency shall arrange to meet the requirements of the inspection personnel regularly inspected.
Periodic inspection in accordance with the relevant rules of special equipment for periodic inspection.
4 inspection report
Inspection and testing institutions tested for safety equipment performance evaluation, inspection reports issued by the appropriate certificate or; Upon examination, found that there are hidden dangers need to be improved, sentenced to waste, it should be reported to the local quality and technical supervision departments.
(Five) deadline
1. Equipment safety inspection unit shall before the expiry of one month to the inspection agencies inspection applications. Receiving inspection and testing institution shall declare in 5 working days to make arrangements to receive and plan to ensure timely completion of periodic inspection.
(2) periodic inspection work is completed, general equipment should be 10 working days to issue a periodic inspection report or certificate, large equipment can be 30 working days of an inspection report or certificate.wire rope hoist On the need for timely inspection equipment put into operation, inspection and testing agency personnel engaged in inspection work is completed within 5 days after, issued by the periodic inspection and preliminary conclusions representations responsible.
3 Use the unit on the test disagrees with the conclusion, you can receive the inspection report (or preliminary conclusions representations) within 15 working days after written comments.

Hoist has the following advantages

Hoist has the following advantages:
1 freedom of movement Lightweight & compact design.
(2) When rope touches the limit arm, automatic stop upgrading.
3 rope anti-spin, the sensor arm brake motors.
4 static and dynamic load sharing activity time setting.
5 Household power supply can operate.
6-pin socket and so handy.
7 lock with safety hook hook pad 360 universal connector.
8 built-in safety features winch, freely control upgrade for warehouses, storage areas, housing areas,manual hoist built special that, workplaces and light manufacturing.
Hoist installation: single beam, bridge cranes, gantry cranes, suspension cranes. Take along additional transformation can also be used as a winch, so it is, is to improve labor efficiency, improve working conditions necessary machinery .
Product Features: light weight,chain block small size, compact structure, varieties and specifications, smooth operation, simple operation, easy to use. They can be done in the same plane straight, curved, circular overhead track, you can also track with electric single beam of grain, manual single beam, bridge, suspension, cantilever, gantry cranes and other use .
Hoist is widely used in factories, warehouses, docks, power plants, sawmill and other occasions,wire rope winch is lifting moving goods, the best lifting equipment.

Crane safety checks general components

(1) hook.
Check the hook marks and anti-off device meets the requirements, hook cracks, delamination and other defects;wire rope hoist hook wear section, the opening degree of the increase in the amount of torsional deformation is exceeded; hook neck and face without fatigue deformation, cracks and associated pin, sleeve wear.
 
(2) rope.
Check the wire rope specifications, models and matching reel pulley meets the design requirements. Rope fixed end plate, Shengka, wedge blocks, etc. rope fixtures meet the requirements.load chain Rope wear, broken wires, kinking, flattening, bending, off shares, corrosion, etc. are exceeded.
(3) brake.
Set the brake, the brake of the type meets the design requirements, the brake lever, the spring without fatigue deformation, cracks and other defects; pins, spindles, brake wheel, brake linings for wear exceeded, hydraulic brake oil leaks ; brake gap adjustment, braking capacity can meet the requirements.
(4) roll.
Roll body, tube edge without fatigue cracks, damage, etc.; rope groove and the cylinder wall wear is excessive; reel flange height and rope winding layers can match; guide rope, rope work schedule meets requirements;
(5) the pulley.
Is there a retaining rope pulley groove means; pulley rope groove, rim cracks, broken edges, excessive wear and other conditions, pulley rotation is flexible.
(6) reducer.
Gearhead runtime without intense metal friction sound, vibration, radiation and other unusual sound shell; shaft is sealed intact,manual hoist loose bolts and other conditions have defects; gear lubricant selection, the oil surface height, vertical gear lubrication pump running, open gear lubrication compliance.
(7) wheels.
Wheel tread, axle whether fatigue crack phenomenon axle wheel tread wear is excessive. Are there eating track running phenomenon. Caused by gnawing track what is the reason.
(8) couplings.
Coupling parts without defects, loose connections, run the impact of the phenomenon. Couplings, pin, shaft pin hole, the buffer rubber ring wear is excessive. Coupling and the connection of the two parts are concentric.
4.4 Crane safety device checks
(1) overload protection device.
Overload protection devices are sensitive and reliable, meet the design requirements, hydraulic overload protection device opening pressure; machinery, electronics and integrated overload protection alarm, cut off the power source set-point integrated error compliance.
(2) torque limiter.
Type torque limiter is jib crane from tipping against overload safety device. Weight gain through increased law or sensitive and reliable method for detecting torque limiter and check torque limiter alarm,chain block cut off the power source set-point integrated error is within the specified range.
(3) limit position limiter.
Check the luffing mechanism lifting equipment, lifting mechanism, operating mechanism reaches the set position signal from the alarm can automatically cut off the power to run the risk of the source direction.
(4) wind devices.
Boom hinge point for the roots of the crane height greater than 50 meters should be checked anemometer, wind speed setpoint is reached or when the ability to accurately operating limit speed alarm. Outdoor work in orbit crane rail clamp should be checked, iron shoes, anchoring device of the parts are deformed, defects, and the reliability of its work independently. For automatic rail clamp, you should check for sudden wind gusts devices and carts running with the realization of non-anchor brake state windproof function and reliability of the electrical interlock switch function.
(5) after anti-tipping devices.
The boom and luffing jib crane type reclining device should be checked against the reliability of electrical interlock sensitivity, check the location and magnitude of amplitude indicator indication accuracy.
(6) buffers.
From the weight of different types, running at different speeds of the crane, you should check whether the configured buffer matches and check the integrity of the buffer, run to the ends can simultaneously touch the stopper.
(7) protection.
Check the crane and the various shields, barriers, guards, ladders, etc. are complete, reliable, crane exposed may cause wound wounding, open drive; couplings, sprockets, chains, belts and other rotating parts without protective cover, Crane Master walkways, ladders, and may result in the exposed parts without barriers, whether it meets the requirements. Open for crane electrical equipment should be located rain cover.

Lifting operations precautions and requirements

1, lifting operations must hold special operating permit. Total is greater than 10 tons lifting objects, must apply for "lifting safe operating certificate";
2, lifting the total is greater than 40 tons of objects and works of the main structure, shall prepare lifting construction program. Hanging objects having less than 40 tons,chain block but in complex shape, stiffness is small, large aspect ratio, precision precious, construction conditions special case, Erection plan shall be prepared by the construction authorities and security technology sector review, reported supervisor or Chief Engineer approval before implementation;
3, before performing a variety of lifting operations, should be pre-set security guard at the scene hoisting flags and let someone care, non-construction workers allowed to enter;
4, lifting operations, the night should have adequate lighting, outdoor work encounter snow, rain, fog and winds above 6, you should stop work;
5, lifting operating personnel must be properly dressed labor supplies, wearing helmets shall comply with the provisions of GB2811, HG23014 height operation must comply with the requirements;
6, before lifting operations, respond to lifting equipment,manual hoist wire rope, embrace wind rope, chains, hooks, rigging and other equipment checks must ensure safe and reliable, are not allowed to use sick;
7, lifting operations must be a clear division of their duties in accordance with the provisions of GB5082 contact signal, unified command;
8, prohibit the use of pipes, pipe racks, poles, electrical and mechanical equipment hoisting anchor. Without mobility, the construction sector accounted for examination may not be buildings, structures as an anchor;
9, before lifting operations must run a variety of lifting machinery parts, safety equipment and rigging spreader detailed security checks, lifting equipment, safety devices to be sensitive and reliable. Before lifting crane must try to confirm correct before operation;
10, no person shall accompany heavy lifting or hoisting mechanical lift. In exceptional circumstances, must be followed and landing, reliable safety measures should be taken, and after a scene to approval;
11, flare for lifting operations shall comply with the provisions of HG23011. Hoisting ropes hanging job site,wire rope winch embrace wind rope, tow rope, etc. To avoid contact with wires and keep a safe distance;
12, with the stereotypes lifting machinery such as crawler crane trucks, tire cranes, bridge cranes and other lifting operations carried out, in addition to compliance with this standard, we must also comply with the stereotypes mechanical procedures;
13, lifting operations must be carried out according to specified load lifting, lifting, rigging calculated choose to use, non-overloaded. The lifting heavy objects close to or reach the rated lifting capacity, check brakes, with a low height, short stroke trial suspended after a smooth lift;
14, suspended below the non-stop heavy people, traffic and work;
15, the lifting operations must strictly observe the "ten no hanging" provides that: ① command signal is unknown; ② overload or weight of the object is unknown; ③ external oblique pull heavy lifting; ④ insufficient light, strobe, or a workplace shadow; ⑤ to stand under the weight; ⑥ heavy lifting heavy objects buried in the ground or on a leash lashing connect with other pipelines; ⑦ heavy fastening strong, rope knot killed, unqualified; rigging is not complete ; ⑧ edge blade objects without liner measures; ⑨ weight more heads; ⑩ safety device failure.
16, you must press the "lifting safe operating certificate" reported on the contents of the job, is strictly prohibited alter,manual block lend, "hoisting safe operating certificate", change jobs, and expand the range of operations or transfer operations area;
17, incomplete examination and approval procedures for lifting operations, security measures are not implemented, the operating environment does not meet safety requirements, the commanding officers illegal command, the operating personnel the right to refuse the job.

Excessive noise when using lift hoists how to do?

Windlass great many causes excessive noise, but the essence is the result of shock and vibration, generally due to the poor quality of the gear meshing, movement is not smooth in motion produces instantaneous acceleration caused. , Here you explain too much noise when using  Hoist equipment  how to do?
Design and manufacture of chassis caused by the presence of noise may: ① chassis with box-shaped structure, not all welds are continuous welding, various chassis weld length, height different positions, there is a big individual differences in chassis rigidity, while others resonate effect, if any one o'clock machine vibration noise is amplified; ② by a steel plate welded into the chassis, do not have the shock absorption silencer function if its natural frequency and the gear mesh frequency is close to the individual machines may cause weak due to vibration caused by the larger gear total shock, cause noise value rises.
Bearing clearance who believe that since the noise is accompanied by drum assembly and transmission parts, then it may be due to the roll bearing large gap caused.

Workaround:
1, we focused on the possibilities were tested, but through three experiments found that the noise level and chassis structure, stiffness, frequency and other factors were weakly correlated noise is strongly related to the size of moving parts, so constructed chassis design, manufacturing quality is not excessive noise causes.
2, we choose the roll parts with the gap, the gap to ensure compliance with the spindle bearing bore drawings,chain block test after assembly. Test using frequency motor speed, observe speed on the noise.
Large number of experimental results show that the speed of the noise impact is the first one, the higher the speed the noise roll larger the value the more intense vibration machine; gap in the second, the spindle and sleeve gap the greater the greater the noise; while the chassis minimal impact on noise. If the machine is already very low noise, the speed level, the spindle gap size changes will not produce excessive noise, which shows that excessive noise nor by the bearing clearance.

Proof chain hoists scrapped conditions

No matter what the product has a certain life, proof  Chain Block   is no exception, as proof hoist field of use and the environment particularity, it should be scrapped for each user to keep abreast of standards in order to avoid security risks, the following details for you Introduction:


1 explosion-proof  manual hoist s hook:
①, section wear more than 10% of nominal size;
②, hoist hook cracks;
③, dangerous section or neck of the plastic deformation;
④, hook mouth size deformation increases more than 15% of the nominal size;
⑤, torsional deformation 超过 10 °.
2, the proof chain hoists  load chain  the following conditions must scrap:
①, chain wear ring diameter than the nominal size of 10%;
②, 11 links elongation of more than 3% from the single link from the elongation of more than 5%;
③, chain link cracks or other harmful defects hoists;

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.

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,