Chain hoists most important aspects of lubrication and maintenance

Lubrication maintenance hoists occupies an important proportion of device management is an important aspect of the hearts of some people may have this question:load chain Why chain hoists require lubrication? Today for everyone to unlock this mystery:
Lubrication in mechanical transmission plays an important role, it can affect the performance of the whole chain  lever hoist  , precision, and life expectancy, since the development of human self-awareness to the motion and friction, wear and lubrication of the close relationship, with the development of modern industry, the more the more devices to the pursuit of a high, high efficiency, energy saving and reliable, which lead to mechanical friction in this portion of the more severe conditions, lubrication at this time was extremely important, and in many cases, a sophisticated technology is the key, lubrication only then is the "refueling method" problem, but also in the master friction, wear, lubrication and laws of nature,manual block in addition to the research and development to enhance lubrication.
After more than a comprehensive analysis of equipment lubrication, I believe you set for the device recognizes the importance of lubrication where, therefore, the opponent pull hoist lubrication from now on.

Explosion-proof electric hoist technology special requirements

Explosion-proof electric hoist function is mainly determined by its material, the use of special areas,wire rope winch such as the selection of the equipment itself has many special requirements, but the selection of only one hand, explosion-proof hoist functions in the technical aspects also have special requirements, the following for you to explain:
1, in order to prevent collisions due to mechanical friction or sparks, explosion-proof electric hoist limiting bare some technical measures should be taken, wire rope reel involvement with electric hoist line speed and sports car on the track running speed not greater than 25m/min.
2, for explosion-proof hoist rope part should face no broken wire, wire rope should be reliable lubrication of measures to reduce the wire rope and reel, guide rope and pulley friction between the components.
3, explosion-proof electric hoist orbit joints should be smooth,lever hoist flat, coupe in the operation should be no impact or obstruction.
4, to ensure proof hoist car braking stability and prevent skidding.
5, if there are two or more tracks running simultaneously hoist explosion, shock absorbing device should be fortified. The material for cushioning device while there are strict requirements, shall be non-metallic materials, the surface resistivity not greater than 10.
6, when the explosion-proof electric hoist a barrier metal working environment is large, hoist hook to avoid collision with the metal barrier, should be marked on the outer side of the hook pulley warning label.
Explosion-proof electric hoist on technical aspects of the special requirements introduced this remind you purchase proof electric hoist should explain your use of premises and areas,hoist equipment to facilitate sales staff to recommend a suitable proof grade.

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:

Tight line usage and Scope

Tight line is mainly used in the construction of overhead lines taut conductors. According to the material is divided into ordinary tight line and aluminum tight line,manual hoist tight line today to introduce you to using methods and scope of application.

Aluminum tight line to use:
Use hand lever handle, drive ratchet, turning spool in order to achieve taut rope. Need to relax rope, just flip the paw handle, stop paw spring tension, the rope can be pulled free.
Use ordinary tight line
When used on the first tight line or galvanized wire rope loosen, and fixed in the cross arm with clamp pliers clamp the wires, and then pulled the special wrench. Since the anti-reverse pawl role gradually rope or galvanized iron wire on the ratchet cylinder, the wires tightened. To tighten the wire fixing the insulator. Then loosen the pawl release the rope or galvanized wire, then release the clip pliers,hoist and trolley and finally the wire rope or galvanized iron wire on the ratchet drum.
Scope:
Tight line for automotive load boilers, steel, wood, bamboo, wool textiles, heavy machinery and other goods essential vehicle tied tight, locate special tools, but also for the temporary lifting of large mechanical equipment installation, car crater traction, wood, bamboo bale, etc. combined tool bar row. Tight line applications: buildings, roads, bridges, metallurgical, mining,lever hoist wells and other infrastructure construction management protection of mechanical equipment, can improve the process of lifting cargo security.

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.

Portable electric hoist brake wear

       Portable electric hoist is a flexible device can move around up and down, left and right movement is achieved by an electric sports car,hoist and trolley but the electric hoist is stopped, there will brake wear for a long time will affect the overall use of the device, the following detailed description of your lifting hoist brake wear causes.
         Portable electric hoist brake wear is actually design problems, slow running electric hoist is driven by a small motor gear motor gear to achieve large lifting, and hanging objects when lifting large motor brake hub will open automatically, stopping automatic locking,hoist equipment electric hoist slow when lifting, by the small motor to drive the big motor rolling, this time a large motor is not energized state, the brake hub is not turned on, a large motor brake locking state rolling, thus resulting in the hoist brake wear.
         Whether slow lifting or fall are slowly worn brake hub,lever hoist which is also in the future to improve mobile hoist focus.

Electric hoist in high-tech applications

   With technology innovation,lever hoist electric hoist industry gradually improve and develop high-tech crane also been presented in the following for you to do the following detailed infrared emission electric hoist anti stayed sensor is how it works:
       Infrared emission electric hoist anti stayed sensors, infrared emission electric hoist anti stayed sensors have small, compact, sensitive, reliable, easy to install, fast, easy adjustment, saving time and labor advantages. It electrical roll cover, characterized in that:hoist and trolley the left and right ends of the roll cover fixed to a sensor, on the end face of the columnar body has the depth of the groove, groove depth of the cavity in which are inserted two pairs of transmit and receive infrared diode, external circuit through a wire connected to the center of the depth of the groove is formed with a window on the outer wall holder with the key groove of the plunger with the sliding rod is equipped with a spring plunger insertion end and a through hole depth of the groove center position of the window,wire rope winch no signal passes the closed state, the front end opened holder on the outside of the wire hole, two card holder rear end plate, with the groove on the cylinder assembly, plunger put inside the housing.

Import and export of electric hoist characteristics showing

     Electric hoist and other lifting machinery import and export still advocate, currently has a number of crane base,wire rope winch technological innovation and strong export main force. These companies have their own brand products, after years of development, has gradually emerged in the international market, the current situation hoist and other machinery exports showed the following characteristics:
1 exporting state enterprises decentralized management can not be ignored, most enterprises have business instability, inefficient and unable to carry out service and other operating defects. Few export enterprises in the international market also taken unfair competition "Made in China" products cause adverse effects. Since electric hoist and other lifting machinery and equipment import and export urgent need to establish after-sales service system, and in the course of personal safety factors involved, we recommend that an appropriate increase in import and export enterprises barriers to entry.
2 electric hoist lifting machinery manufacturers of spare parts for global sourcing. At present,lever hoist China spare parts industry is still unable to meet the needs of machine manufacturers, especially in the engine, hydraulic systems and other core parts and components. Therefore, some companies have financial strength to recognize their lack of original supply chain, and actively with international top parts suppliers to cooperate to achieve the overall use of global sourcing to enhance the quality, to seize the international market share.
3 electric hoist crane substantial growth in exports to emerging markets. In the world economy is not stable, the majority of developing countries, the situation is not bad, Chinese engineers and crane products are relatively low grade, high cost, have a good market in developing countries is reflected in China to Russia and other CIS countries, Africa and other developing regions of ASEAN's exports is still rapid growth.
4 electric hoist lifting the fifth consecutive year export growth rate higher than the growth rate of export of electromechanical products.hoist and trolley Most export products with our own brand and price competitive advantage by national policy support, so construction and agricultural machinery with export base and high growth potential.

The growth direction of the electric hoist

This light and small electric hoist lifting equipment, widely used continuously while new categories and models have gradually diversified, electric wire rope hoist  in the future direction of growth in the end is what?
      1, the exterior design changes: changing the traditional round shape design design, square design, modular design, increased component commonality;
      2, optimized gear design, improve the carrying capacity of the gear;
      3, electric hoist design rationalization: strive to use fewer base model covering the entire series.
      4, the structure should be able to meet a variety of conditions: as low headroom, twin-lift, and lift gate with a small radius of curvature; remote control, insulation type, corrosion proof type,lever hoist and other features of the product;
      5, using high-quality high-strength steel wire: to meet the tensile strength of the safety factor of the premise, to minimize the rope diameter;
      6, increase the electrical protection measures: In addition to the upper and lower limit protection, overload protection and wrong should be added equal protection;
      7, increasing dual brake: cone brake wheel braking and high speed shaft compensating brake;
      8, improve matching pieces such as wire rope,hoist equipment bearings and other parts of the quality standard wire rope hoist.
      9, 2,4,6-pole motor with cone rotor motors to suit a variety of working conditions;
      10, focusing on the whole of paints, packaging and other exterior quality, mini electric hoist is the same.

Lifting hooks scrapped relevant standards

Lifting hooks scrapped relevant standards
1, the torsional deformation 超过 is 10 °.
2, after welding the hook when worn.
3, the opening degree of increase in size than the original 15%.
4, the hook surface cracks.
5, the dangerous section or plastically deformed hook neck.
6, the size of the hook shank corrosion is less than 90% of the original size.
7, wear dangerous section of 10% of the original size.
8, when a crack tail root rib.
9, the sheet has lateral deformation of the hook plate,lever hoist when the deformation of the bending radius is greater than 20 times the thickness, the hook must be replaced film.
10, sheet hook up spindle wear 5% of the original size, should be scrapped mandrel.
11, the wear plate wear plate hook up to 50% of the original size,load chain should be scrapped wear plate.
12, the sheet bushing wear hook up to 50% of the original size,manual block the bushing should be scrapped.

Cranes basic institutions and basic common sense

A variety of different purposes lifting, structurally very different, but all have the basic actions to achieve lift lifting mechanism. Some also have run institutions crane, luffing mechanism, slewing mechanism, or other special working bodies. Materials by rope or lifting chain hanging a flexible member such movements, but also by a screw or other rigid pieces jacking.
 A) general structure of lifting large complex organizations, to complete the lifting movement, horizontal movement. For example,wire rope hoist to complete the lifting crane, dolly carts run and run three sports; portal cranes can complete hoisting, luffing, slewing and carts run four movements. In the working process, often several different directions of motion simultaneously, greater technical difficulty.
      2) lifting the lifting of heavy objects varied load varies. Some heavy objects weighing several hundred tons or even thousands of tons, and some objects up to tens of meters, irregular shape, with scattered granules, hot melt state, inflammable and explosive dangerous goods, etc., lifting process is complex and danger.
      3) Most of lifting machinery, you need to operate within a larger space, and some want to install rails and wheels (eg cranes, bridge cranes, etc.); some should be fitted with tires or caterpillar walking on the ground (such as cars cranes, crawler cranes, etc.); others need to walk on a wire (such as passenger, cargo ropeway), larger space, once the effects of the accident caused by a range of well.
    4) Some lifting carriage of persons in need rails, platforms or rope to do lifting movement (such as elevators, lifting platforms, etc.), which directly affects the reliability safety.
      5) Lifting exposed, moving parts are more often associated with lifting operations and personnel in direct contact (eg hook, wire rope, etc.), a potential risk factor for many sporadic.
      6) operating environment is complex. From large-scale iron and steel enterprises to modernize ports,hoist equipment construction sites, railway hubs, tourist attractions, there are lifting machinery in operation; workplaces often case temperature, high pressure, flammable, transmission lines, magnetic and other risk factors , for equipment and operating personnel a threat.
      7) Lifting operations often require more than one match, jointly conducted. An operation requiring command, strapping, driving and other operations personnel with skilled, motor coordination, mutual care. Workers should have the ability to deal with on-site emergencies. More close cooperation between workers, usually there is a big difficulty.
      Lifting of the work characteristics, determine its relationship with great safety. If lifting the design, manufacture, installation and maintenance of such links is the slightest negligence may cause injury or equipment accidents. On the one hand causing casualties,lever hoist the other, will cause great economic losses.

Lifting optional installation and inspection

1 Selection: Enterprise in the purchase of lifting machinery, the first use of the enterprise scope, work frequently, utilization, nominal weight and other factors into account, select the appropriate requirements of this unit of work level cranes. Under the proposed technical parameters,manual block conduct market research. Suppliers of choice, must be licensed with the special equipment safety professional crane manufacturer. And examine supporting manufacturers of processing equipment, the production of standardized, advanced products, compare and choose affordable, good quality, excellent performance, safety devices, complete lifting machinery. After the arrival of equipment, out of the box to check the acceptance random technical information is complete, random parts, tools, accessories are consistent with the inventory, equipment and accessories for damage, defects, etc., and make unpacking inspection records.
2 Install the choice of units
Crane installation team can choose a qualified manufacturing electric  rope hoist  manufacturers, forming manufacture, installation, commissioning one-stop service model. Installation unit is determined, install the unit before installation to help deal with the special equipment begins the report and check the installation team of construction organization plan, installation of equipment, installation procedures, technical requirements, the installation process concealed work records, self-reports and other compliance requirements . After installing the unit to supervise the installation and operation of a comprehensive self-test, load test, self-test confirmed after passing the reporting agency to install special equipment inspection and acceptance. Acceptance and obtain a "safe use permit" only after put into use. After acceptance, and use of the crane should be random technical information, installation and inspection reports and other relevant technical data archiving. Later in the use of our regular inspection,lever hoist repair, alteration, accident records and other information can also be stored in crane safety technology file.

The two-speed electric hoist overload device

Two-speed electric lift hoist  housing end plate at one end with a positioning mandrel and the stopper plate, positioning the mandrel head fitted with an eccentric shaft extension bracket, balance pulley device at one end hanging in the eccentric shaft extension bracket head, in the lower bracket with the eccentric pin, the eccentric side of the bracket is provided with a supporting plate, the support plate section be equipped with a proximity switch, the eccentric shaft extension bracket and the eccentric head center bracket hole centers offset positioning mandrel 3 mm.


Countries in this year's increase in the use of special equipment installation of the new requirements, all fully installed two-speed electric  lever hoist  electric hoist overload limiter overload limiter, balanced pulleys mounted electric hoist electric hoist housing unit and between the end plates.
When lifting heavy gauge, eccentric bracket shell around the hoist side panel positioning mandrel rotates counterclockwise in to a preset distance proximity switches, proximity switches off the contactor line package lifting circuit, cutting off electric  Rope hoist  lifting motor power, so two-speed electric hoist stops running, play overload limiting role in achieving the safe operation of the crane, improve the reliability and security.

Detailed group hanging electric hoist parts

Group hanging electric lift hoist  components used to let you know group hanging electric hoist parts, performance and use of standards, more secure and rational action. Our products, quality production technology, reliable performance, you are welcome to buy.

Electric hoist crane group is divided into three main parts point:
1, lifting the motor: it is an electric chain hoist in the heart, played a leading role, scale electric  lever hoist  with high-performance motor with 30 minutes of lifting grade and class B insulation properties.
2, dual brake system: to ensure the safety of construction staff hub where, electromagnetic brakes and mechanical brakes, two complete and independent of braking system not only reduces the possibility of brake failure, also enhances braking safety and conducive to heat.
3, lifting chain: commensurate with electric chain hoist's right hand man, chain electric hoist lifting chain with Φ7.1mm and Φ11.2mm 80 Class A surface hardening lifting chain, to ensure their safety and durability. Lifting chains tough surfaces can prevent product damage and softening of the core material, so that long-term high performance lifting chain. Electric  hoist equipment  chain of low-carbon steel, the chain is more resilient, and more rugged wear at work to ensure the safety. Group hanging electric hoist chain can also be customized according to customer requirements lengthened, so you use the more convenient worry.

Electric chain hoist crane group how to use

Replace with electric  Hoist equipment  lifting groups in the new tank construction, construction can greatly reduce the labor intensity and improve working efficiency. However, the construction of the tank lifting how to avoid overloading group hanging electric hoist operation is to improve the efficiency and safety of the key, but also need to attach great importance to the construction team for each question.
First, the overall weight of the tank should have a correct calculation, generally selected from the  rope hoist  that the total weight of the overall weight of the tank more than 1.5 times. After determining the number of units of electric hoist, to accurately calculate and determine the spacing of hanging points, each lifting point spacing must be equal and balanced distribution. Requirements for the first time since the construction process less open sunroof, first hanging point to as little as possible, consistent spacing lifting point, consider hanging point equalizer setting to keep the spacing of hanging points equal as possible for both electric hoist load operation to create the conditions. Based on past experience in construction, for the first time hanging point is generally selected  lever hoist  half the number of units, the second hoisting construction has been completed, that is, in a timely manner before the third layer lifting up into the rest of all lifting points uprights, hang entire electric hoist, all put into the third layer lifting operation. In improving operations, by experienced professional rigger scene commander.

How upside down stage hoist installation?

Stage upside down electric Wire rope hoist  is a relatively strong professional lifting equipment, it is mainly due to the arena touring, touring exhibition design requirements. Stage electric hoist factory have been tested 3 times and 2 times overload test, described in detail the stage today for your initial use of electric hoist upside down how to install a hybrid commissioning?
Stage upside  rope hoist  initial lubrication is required before use, a, will need to be lubricated chain degrees, including a chain, the contact point between the connecting rod must be properly lubricated. b, gearbox: the ambient temperature is about -10 ℃ to 50 ℃ between, you should use 220mm2 / S 40 ℃ temperature and high pressure gear oils with additives, gear oil specifications for DIN 51502 CLP 220.
Lubrication work is completed around the object to be cleaned, the stage upside down hanging electric hoist will need to be a place without hindrance. Suspension point is a location that allows carrying hooks and any anticipated load increase and decrease the unimpeded. Bottom lumps must not touch the ground, if there is a need, in the end of the chain slack adjustment CHAIN ​​stop position.
Connected to the power supply with the stage hoist operation voltage and frequency are marked on the motor nameplate rated voltage on in connection stage before powering electric  lever hoist  definitely want to check these figures consistent with those of the supply voltage.
Finally, you need to debug the stage hoist, after completing the assembly, but the crane being used in normal operation, the following procedure should be completed. Isolated power supply, check all mechanical and electrical connections and connections are locked and is secure. Turn on the power to all the stage lightweight load operation range of electric chain hoist and check operation is always smooth. In the light-weight bearing and full load conditions, check the operating status of the stage hoist.