Electric hoist and electric hoist crane

Electric hoist and electric hoist crane is widely used in national economic sectors of simple lifting equipment. Production this kind of equipment in our country has more than 20 years of history, in recent years under the joint efforts of all brothers factory, successfully trial-produced the CD, MD, a new series of electric hoist, our factory also manufacture into a new type electric hoist single-girder crane. In foreign countries, because this hoist equipment of device has simple structure, cheap, wide range of use, also a lot of new products. Below we know parts of it are briefly introduced. Abroad situation of west Germany chainb lock company P type electric hoist in the form of electric hoist double beam crane has developed to a weight of 63 tons, the specific structure of the electric hoist has some local improvement. Significant improvement is its operation device. Figure 1 is the operation of the improved system diagram. Can be seen from the diagram, the new operation unit is both sides of the operating device is driven by an electric motor, it can avoid running twist phenomena caused by drive only one side. At the same time, it went round big board is made of pressed into thin steel plate, than in the past, the steel weight and ease of processing.

Ring electric hoist loading test system hardware design

Ring loading test system hardware design of the electric hoist lifting equipment manufacturing industry in our country, the electric car type ring chain manual hoist hoist electric hoist limit load point of the system mainly includes a hydraulic loading system (hereinafter referred to as ring electric hoist) is a new kind of small-sized lifting products, it has a volume and a single-chip microcomputer control system. Small, light weight, high strength, appropriate price etc, especially suitable for low building height as shown in figure who, hydraulic test system for limit load experiment, the hoist equipment pressure under the small flow pump and the space is lesser workplaces of lifting and handling operations. Work, overflow valve manually adjusted to the rated pressure, according to two different series of common inspection method on the properties of ring electric hoist crane is mass loading the product choose three four-way valve gate, the overflow valve pressure oil flow method, which includes static and dynamic load of two processes: a pilot proportional relief valve. In ring electric hoist is not ascension, limited to the products tested to 1.5 times the rated load experiment belongs to dynamic loading, the loop electric hoist ascends, conditioning section leads people weight blocks, the quality of stay for a few minutes, to determine its static performance. Proportional relief valve from the rated load strength, step by step until the ring electric hoist electric hoist inner ring.

Lever hoist is a kind of hoisting wire rope drawing tools

Lever hoist is a kind of hoisting wire rope drawing tools, when working by hand pull (handle, alternative action by rocker, connecting rod in the clamping mechanism, driving load forward or backward. Because there is no brake lever hoist wire rope, so the clamping mechanism is grasping mechanism brake mechanism, is the key to this kind of product. Design lever hoist wire rope, the main problem is the design of clamping mechanism is calculated. Since there is no uniform design specification, we are updated according to many years of three generations of the product design, test and manual hoistexperience, the design and calculation method of the following are put forward. These data and the method also can be used for reference in the other wire rope in the design of clamping mechanism. A basic size, clamp, clamp plate calculation of the clamping lever hoist mechanism by the clamp, the clamping plate and pin shaft with clamping plate connections side panel, etc. Pull (forward) the handle, the size of the connecting rod drives the side panel for chainb lock motion, a pair of side panel, the other a pair of side plate back; Forward that lateral plate clamping plate.

mainly used to lifting crane equipped with

Into items, it is mainly used to lifting crane equipped chainb lock appropriate spreader can also after lifting material and liquid material. Crane work is characterized by intermittent movement, that is in a working cycle, to pick up, transport, unloading corresponding mechanism is work alternately. The agencies are often in starting, braking and running manual hoist condition of the positive and negative direction. The classification and features of the crane crane according to the structure classification according to the structure is divided into boom crane type crane and bridge type crane. Crane overview the status quo of hangzhou a manufacturing unit with an electric hoist bridge crane load across a runtime easily occurs in the car derailment problem, the crane lifting weight of 10 (t vice hook for 3 t), lifting height of 8, to 28 m span, the car track is 1600 m, work level for A4, no machine design. The crane has been in operation for more than five years, usually use frequency is higher.

Wire rope electric hoist rope guide

Wire rope electric hoist wire rope electric hoist on the guide rope device for wire rope by the regulation on interval neatly around the drum gear. When the hoist equipment rope device on the drum synchronization with wire rope winding cannot be moved, often guide rope is pulled bad, the phenomenon such as connecting rod were bent. The guide rope device breakdown can make the guide rope device cannot perform the function of the rope, rope pressure, at the chainb lock time may cause height limit is invalid, lead to a lifting accidents. Repair damaged when the guide rope device, replacing arc clamp is very troublesome, and have a certain risk. In this case, the author using TRIZ theory analyses the steel wire rope electric hoist rope guide, gives the solution, and the solution added TRIZ invention principle in the database at the same time. Electric hoist can be used as a heavy equipment used alone, a small driving after also can be used for overhead monorail crane. Is a kind of compact structure, light weight, high efficiency and easy operations of lifting equipment. Specifications of wire rope electric hoist by building height, track type type can be divided into 14 types. Its appearance figure is chosen, and work performance. Type electric hoist wire rope electric hoist the code and the type code of another type of HSG standard building height, linear rail, rigid connection of hand trolley.

Is a wire rope (rod) deep processing products

Made up of many wire twist into a rope used in industry, widely used in all kinds of industrial, mining and transportation. There are many different kinds of steel wire rope, but used in oilfield is a round rope, only have a single or double twist twist, and in the majority with double twist. Double twist rope is wire twist into a, again by a few strands twisted into a steel wire rope, wire rope at the center of both  core, there is also a steel core. With several root manual hoist section shape and the diameter of the wire, according to certain rules as twisting spiral wire bundle. Is a wire rope (rod) deep processing products, in steel wire products occupy a larger proportion. Origin, development and current hoist equipment in the steel wire production before using the hemp rope and chain, was later by organic fiber and metal chain to rub into the low tensile strength of the rope. With metallic ore and coal mining and transportation in the elevator with the development of the hoist machinery, the rope can not meet the requirements, began to replaced by metal wire twist twist wire.

Hand chain hoist is a kind of small manual lifting tool

Hand chain hoist is a kind of small manual lifting tool. Safety, light weight and convenient operation is the goal of the chainb lock of the product. To achieve this goal, according to the characteristics of the chain product structure, reasonable design of the gear is especially important. At present, the chain in gear, mainly is the involute spur gears. Reasonable design of this kind of gear is still the focus of the improvement of involute gear tooth profile, because it is the factors affecting the service life of bearing capacity and the use of involute gear is one of the most main factor. From the manual hoist practice and theoretical analysis shows that the reasonable selection of tooth profile Angle, transition radius and addendum higher tooth shape parameters, the comprehensive improve the bearing capacity and service life of the involute gear has a significant effect. According to the tooth profile Angle, selected a reasonable transition radius and the addendum higher combination parameter, manufacture special gear cutting tools, in the gear processing, is still very economic, the chain of low-value products especially for. Therefore, this article through to the different tooth profile Angle, the transition radius and addendum higher gear tooth profile parameters on the performance analysis and comparison, choose the reasonable parameter values and their combination, as a practical design chain drive gear recommended value.

Electric hoist electric hoist for short, is a small light lifting equipment

The tonnage of steel wire rope electric hoist is 0.5 T/T 1/2 T / 3 T / 5 T/T/T/T, 20 16 it is the standard of wire rope in meters 18 June 12 M/M / 9 M/M / 24 M / 30 M. It is also manual hoist into which CD1 and MD1 type (single speed) type (double speed), the following for the operation of the wire rope electric hoist speed: 0.5 T - 5 T T T 16-20 T single speed: 8 M/MIN single speed: 7 M/MIN single speed: 3.5 M/MIN speed: 8 M/MIM, 0.8 M/MIN, double speed: 7 M/MIN, 0.7 M/MIN double speed: 3.5 M/MIN, 0.35 M/MIN. Electric hoist electric hoist for short, is a small light lifting equipment. Most electric hoist equipment used by people follow the manipulation button in the ground, or can be in the driver room controlling or use cable (wireless) remote control.

Also called the fairy gourd, jin does not fall

Also called the chainb lock gourd, jin does not fall, manual hoist is a kind of simple to use, easy to carry the manual hoisting machinery, also known as the "chain hoist" or "chain". It is suitable for small short lifting equipment and goods, the weight is generally not more than 100 t. Shell manual hoist is high quality alloy steel chain, strong wear resistance, high safety performance.

Lever hoist wire rope machine chassis high strength high quality aluminum alloy die-casting

Lever hoist wire rope machine chassis high strength high quality aluminum alloy die-casting, supporting the use of wire rope has a particularly high breaking force and abrasionmanual hoist, according to the customer need to hoist equipment the appropriate length of wire rope. Mainly to a 800 kg, 1600 kg, 1600 kg.

Loader transmission system and hydraulic system

Because the loader has operation speed, high efficiency, good maneuverability, the advantages of convenient operation, so it become one of the main models of the conditions in the construction of engineering construction. manual hoist paper introduces the common several kinds of loader working device and working steps, also introduces the loaderhoist equipment system and hydraulic system.

Construction engineering machinery and equipment

Wire rope manual hoist belongs to special lifting equipment, has a compact structure, light weight, small volume, parts versatility, convenient operation. It can be installed on the i-steel alone, also can form a complete set of installation in the electric or manual single-beam, double beam, cantilever, such as gantry crane. Is mainly used for all kinds of promotion, moving, loading and unloading heavy weights, tank inversion welding, such as a hoist equipment of large and medium-sized concrete, steel structure and mechanical equipment installation and moving, applicable to the construction and installation company, factories and mines of civil engineering and bridge construction, electric power, shipbuilding, automobile manufacturing, construction, road, bridge, tunnel, metallurgy, mining, slope protection infrastructure projects such as shaft governance of mechanical equipment.

Wire rope electric hoist

Wire rope manual hoist is a small-sized lifting equipment, steel wire rope electric hoist with compact structure, light weight, small volume, parts versatility, convenient operation, it can be installed separately on the i-steel, also can form a complete set of  chainb lock in the electric or manual single-beam, double beam, cantilever, such as gantry crane.

Electric hoist can be used alone not only, still can work with gantry crane and other large equipment

 

Stage electric hoist can be used more than one at the same time as well as group of crane electric hoist can be used to control cabinet control at the same time

Electric hoist is not only can be used alone, can also work with gantry crane and other large equipment, in addition, there are more than two ring chain hoist can be used for lifting heavy things work at the same time, the hoist is called "synchronous electric hoist.

Said to use at the same time, many in the industry will first think of group of crane electric hoist, it is a low speed chain electric hoist, because have the lifting speed is slow, smooth operation, the body is light, machine wear characteristics such as small, group of crane hoist is widely used to climb in the field of chainb lock engineering, the ascension of climbing form, large oil tank group of cranes, etc. Use in large oil tank welding, and other fields, can choose according to the size of the tank volume is more than one hoist are used together, and use the control cabinet and unified control.

Except DHP were studied.the optimum hoist equipment can use synchronous lifting hoist, electric hoist stage can also be used at the same time, more like the group of crane electric hoist can be used to control cabinet control at the same time, the stage one of the advantages of electric hoist is not only can use, are hung down can also lifting heavy objects. Stage up to 38 m electric hoist hoisting height, the chain all through galvanized processing, not easy to rust, lubrication oil in a gear box, effectively prevent the oil droplets to infiltrate the stage. Not only beautiful and durable, so the construction of the stage and theatre, everywhere.

Mini electric hoist rope characteristics

Edit: vigorously lifting machinery Views: 33 Add Time :2013-11-18 08:11:44
   wire rope winch is the most common kind of crane flexible member, such as we use more rope around mini electric hoist, which due to the small volume, at home, hotels, shopping malls can be used, it is the use of wire rope for lifting lift heavy loads. Rope application so extensive, that it itself in the end what advantage is how widely?
   Rope hoist from their own conditions in terms of high strength, large carrying capacity, and flexibility, impact resistance, weight is small; at work, flexibility is good, smooth operation, low noise and high-speed operation, it is important not suddenly break.
   Although the rope so strong advantages, but also need to carefully after use maintenance to increase the efficiency of times.

Wire rope pulling hoist the seven notes

Wire rope pulling hoist is a simple structure, the use of heavy lever handle complete lifting,hoist equipment lowering, pulling, lifting tool calibration and other operations. Wire rope pulling hoist can not only do non-linear traction work, but you can easily select the appropriate cutting operating position, maneuverability and traction from the principals, easy to use. Here to introduce you to the seven wire rope pulling hoist Precautions

One must choose the appropriate size of the load hoist tonnage

2, the housing must be checked prior to use all screws are tight, not loose; toggle lever check whether the action of various normal; when running coordination, no abnormal noise or catching the handle can be pulled loose unloading, penetration wipe clean already supporting rope and wire rope clamp, and then pulled forward or backward Shouben handle,hoist and trolley depending on whether the action is normal.

3, with the provisions of models, specifications of wire rope to hoist securely fixed.

4 operations, other than those allowed by supporting instead of wire rope with rope; operation, the rope should be kept clean to prevent the adhesion of mud and oil into the machine, affecting the normal use or exacerbate clamp wear.

5, no need to increase the use of lubricants

6, shall be arbitrarily extended operating handle; operation should let the rest handle freedom follower, not jamming.

7, in exceptional circumstances, gourds used as loading  lift hoist  raised, the hoist from the weight should be reduced to nominal weight of 1/3.

Proper maintenance of wire rope pulling hoist tips

Wire rope pulling hoist lifting equipment is widely used one, there are lifting, pulling, tensioning three functions, high safety factor, long service life. Good maintenance methods help to prolong the life of lever  manual hoist .
So how to better maintain the wire rope pulling hoist, the following points for you, I hope for your help:


Wire rope pulling hoist maintenance

1, each job is completed, we must first wipe the loose end of the rope on the adhesion of mud,lift hoist dust or grease, loosen the jaw, out of wire rope, wire rope sequence will gather around the shelves, and wipe the length of wire rope, wire rope stored in dry place to prevent corrosion.

2 year deal at least four times a gourd maintenance treatment, such as diesel cleaning parts, and calcium-based grease lubrication.

3, when the internal movement poured into the mud, cement or other dirt, use a rinse, then clean diesel; cleaning, dry calcium-based grease on the grease; finally release the jaws,wire rope winch wipe with a clean cotton pliers mouth of grease and moisture.

4, when the jaws wear, carrying capacity is less than 80% of rated load, replace the jaw; when the wire rope diameter is reduced 10%, the rope should be replaced

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.

What are the characteristics import chain hoists?

Chain hoists divided by origin
Domestic wire rope hoist s, chain hoists;
Divided according to the shape chain hoists
Round chain hoists, chain hoists triangle, K-type chain hoists, chain hoists Ling, V-type chain hoists, T-type chain hoist, mini chain hoists, explosion-proof chain hoists, hand 360 degrees pull hoist and so on.
Import chain hoist six characteristics:
1, the fine structure: the internal structure of the overall fine, simplify; appearance of tiny, innovative and generous. Entire product ergonomic.
2, the optimal gear: the product heart - gear for a more compact high-speed synchronous gear; optimal materials, direct to ensure the whole super-stable product performance,hoist and trolley wear coefficient increased by 1 fold, to meet the long-term overload operation needs.
3, the new hook: hook at the user-friendly design, from whatever direction the goods are not easy to pull decoupling, alloy foot material, thus preventing breakage and loss of material injury.
4, excellent parts: All parts are high quality alloy steel and carefully selected from manufacturers, resolutely eliminate substandard size parts.
5, a special casing:hoist equipment stainless steel pressing cover, light, solid, easy to forge.
6, refining chain: High-strength high-quality chain by experienced workers, 20 step sanding finish; counterparts at the weld is not rough, safe, feel good; medium frequency quenching; burst operation, overload operation, long-term jobs are to ensure that no accident; pull from multiple directions, broader scope; cover rust, used often new.

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

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:

Steel cord before using the hoist installation and commissioning

Electric wire rope hoist  before use in order to ensure safe use, customers also need to make simple commissioning work, the following details for you:
Electric wire rope hoist components are: motor, transmission, drum and rope four parts. The position of the motor and the roll can be divided into four types, different types have their advantages and disadvantages.
(A) motor axis is perpendicular to the axis of the hoist drum worm gear used, the width large size, structure is more cumbersome. This structure appears early in love, has no such type.
(2) The motor axis parallel to the roll axis, this structure is the biggest advantage of the electric hoist height and length dimensions. Disadvantage is the width dimension, manufacturing and assembly of complex, large orbital turning radius is large.
(3) motor mounted on the inside of the wire rope  manual hoist  drum hoist, the length dimension is small, relatively compact structure. But the motor heat is not good, if there are problems inspection, installation, maintenance, motor is not easy.
(4) motor mounted on the outside of the drum hoist, this way, to change the motor heat is not good for a big disadvantage, but also more convenient installation and maintenance easy. But the length of the large size, is not suitable for places where space is limited.
Electric wire rope hoist installation should pay attention to the following aspects:
Electric wire rope hoist mobile use of the track, I-beam by the user according to GB706-88 standard design of their own choice. Install a small car to be adjusted by adjusting the washer to ensure the orbital rim 3 ~ 5mm gap between the edge of the can.
Fixed hoist should be installed to ensure proper security methods, cage safe and reliable.
About electric hoist electrical installation, please refer to "steel cord electric hoist for Circuit" to install appliances.
Off the fire stopper is adjusted by adjusting the stopper rod two hit the block to achieve, loosen the screws on the block hit, hit the block divided into guide rope on both sides of card board,load chain card board can move freely promote collision block . Start the motor starts to lift, push cap-bit card board hit the block moves, rose to hook pulley shell casing along a distance roll under 150mm ~ 50mm, stop up, move down buttons, rope guide moves back 10mm or so, Move down hit the block near the upper limit card board, tighten the bolts can be.

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.

Chain hoist how to adjust the friction clutch

Adjust friction clutch chain hoist use professional testing equipment to measure the friction torque.hoist equipment The use of on-site maintenance, you can only rely on inspection and operational test to complete the following steps:
1, the upper and lower lid and the need to remove the gear box front cover;
2, the locking washer insurance cleat open, and remove the need to adjust the nut, remove the pressure ring disc spring seat and the platen.
3, the outer friction plate without damage or serious damage, the dirt is left in the top.
4, after removing the clutch gear while checking internal friction plate is broken or badly worn, whether the above dirt.
5, clean friction plate, the dried and polished with gauze Replace.
6, try hanging nut after adjustment is required to the amount set out together from half to 25% overload,wire rope winch followed by tightening the adjusting nut, lifting sensitive operation freely, to reach 1.3 to 1.6 times the amount set out above start to slip.
7, in the no-load lifting process required to hook hit the block hit hard rubber case, when the chain hoist motors continue to run while the hook does not move did not hear any sound, indicating that the protective effect safety clutch, and then semi geese lifting load test to the limit position clutch slip, the amount required test load, containing 25 percent since, after less than three trials before the lock washer insurance cleat locked,manual block and the need to slow down cover installed after adjusting friction clutch.

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.

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.

Concerning the technical specifications of wire rope hoist

CD  wire rope hoist  frequently used as a small lifting equipment technical specifications more stringent Next introduce the details of technical specifications, allowing you to hoist its interior there is a general understanding.
       1, wire rope electric hoist three-phase main circuit rated voltage, rated frequency is 50Hz, the working environment temperature (-25 ~ 40) ℃.
       2, electrical, electronics, buttons, switches and other protection shall comply with GB / T 4942.1 and GB / T 4942.2 in IP54 requirements.
       3, for lifting the molten metal is used, fragile, dangerous items such as wire rope electric hoist,manual hoist lifting mechanism working level should be raised, and to add the necessary safety precautions.
       4, electric hoist temperature insulation resistance value is not less than 1.5MΩ, ground connection resistance value is not greater than 0.1Ω.
       Precise technical specifications for the use of lifting equipment to improve the safety and security of the technical specifications for the wire rope hoist part of the contents,manual block if you have any questions please call the hotline inquiries.

Fans hoist bucket chain positioning mechanism

       Wind turbine that is dedicated  wire rope hoist  electric hoist, electric hoist with its unique and innovative wind turbine is designed to meet the needs of the wind power industry, here to introduce you to an important part of the fan hoist bucket chain positioning mechanism.
Wind power electric hoist bucket chain positioning mechanism to solve the prior art bucket easy tilt and other technical issues. Including setting up in the chain between the bucket and hoist bucket chain and can be fixed at the bottom of the fixed ramp hoist structure,wire rope winch electric hoist chain be able to access bucket chain. The positioning mechanism further includes a fixed structure or between the bucket and chain electric hoist and chain bucket bucket chain between and can prevent lateral tilting at work limit structure.
       Fans hoist bucket chain positioning mechanism of the main features:
       A simple structure, reasonable design, can effectively avoid the chain out of the bucket chain process, due to the uneven distribution chain bucket chain orientation caused the phenomenon.
       2, improve job stability electric  lift hoist,  chain bucket can effectively avoid the occurrence of tilt, ensuring smooth out the chain bucket chain.
       3, bucket positioning solid, reliable, and easy to implement.

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.

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.

How to identify the quality of proof chain hoists

    Proof chain hoists are very suitable for manufacturing the explosive, flammable, magnetic and erosive using security tools. More practical than ordinary chain hoists, safe and reliable.hoist equipment Proof chain hoists with durable, excellent strength machine; performance, easy maintenance; feel good hand zippers, hand-pull small, high transmission efficiency; advanced structure, beautiful appearance, greatly reducing the operator's labor intensity, etc. and other advantages, Here is your proof chain hoists to explain how to identify good or bad quality, for your reference.
       First, this explosion proof chain hoists its performance to be in full compliance with national GB/10686-1989 standards.hoist equipment Second is to see gourd material, proof chain hoists material is used in the manufacture of aluminum bronze, beryllium copper as the blank, the shell is made ​​of H62 copper alloy, due to the special nature in the selection of materials does not impact or friction sparks. Identification proof chain hoists quality mainly from the National Institute of Standards and material hoists on the judge.
       Select  manual hoist  and other lifting products must pay attention to product quality, only the high standards of quality lifting products, in order to have better security.

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;

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.

Electric hoist to meet special requirements of industrial production

  Currently, many electric hoist brands,hoist equipment can fully meet the needs of lifting industry characteristics are not many products, mainly because of the particularity of the crane, electric hoist must have some special properties:
         A fast dynamic response, dramatic changes in order to meet the needs of the crane load.
         2, can withstand dramatic changes due to potential energy load that appears in the current impact and ensure continuous reliable operation of mechanical vibration environments.
         3, the deceleration of the motor can be reliably released renewable energy, as the current capacity of the braking unit must be greater.
         4, with high reliability protection system for wire rope winch  mechanism, need special attention mechanical brake is released before or after the moment of brake to prevent the "slip hook" of the control.
         5, with a powerful monitoring system, through the monitoring of implementation of various parameters of the system failure alarm and failure analysis.
         With the continuous development of inverter technology, electric hoist performance and increasing the mechanical properties of hard-frequency control, speed range, speed and high precision,manual hoist good stability, easy to control and energy-saving features, can well meet the lifting equipment safe and stable, reliable, good operability reliable, maintenance requirements, rapid breakthrough in the crane industry and widely used.

Common market of the three mini electric hoist

The use of mini electric rope hoist  closer to people's lives, is now emerging electric hoist, models are also diverse, on the market for you to explain the three common types of mini electric hoist, I hope for your help when purchasing.
        Mini electric hoist also called "civil gourd" concrete divided into three types HG, HA, HK. Every model of a miniature electric  wire rope hoist  lifting of the speed, altitude, electrical power, weight lifting are different, the following your Details:
A, HG miniature electric hoist specifications H-K201, H-K202, H-K203 three, the nominal weight for 200KG, 250KG, 300KG.
Lifting height: 25m
Lifting speed: 20m/min
Input power: 1450w, 1850w, 2600w
         Two, HA mini electric hoist the main specifications are H-A101, H-A102, H-A103, H-A104, H-A105, H-A106, H-A107. The use of single / double hook different different weight lifting.
Nominal weight, respectively (single hook / hook): 100/200KG, 125/250KG, 200/400KG, 250/500KG, 300/600KG, 400/800KG, 500/1000KG;
Lifting height (single hook / hook): 12/6M;
Lifting speed (single hook / hook): 10/5 (m / min);
Rated voltage of 230V, 50HZ, working coefficient of S3 20% 10MIN;
Input power,hoist and trolley respectively: 500W, 580W, 880W, 930W, 1352W, 1500W, 1700W;
Gross and net weight are: 24/22KG, 25/24KG, 33/25KG, 36/34KG, 41/38KG, 38/36KG, 40/38KG
Three, HK mini electric hoist specifications H-K201, H-K202, H-K203 three, the nominal weight of 200KG, 250KG, 300KG.
Lifting height: 25m
Lifting speed: 15m/min
Input power: 1150w, 1350w, 1500w

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.

Electric hoist equipment management prevention system

   Strengthen preventive electric hoist equipment management system to reduce accidents, to ensure personal safety and work efficiency
       1, strengthening the electric  hoist and trolley  equipment safety management. For electric hoist and other small mechanical characteristics, should develop detailed safety rules and regulations, management system, ledger to complete. For electric hoist, and other special equipment should be regularly organized professional security inspection, investigation equipment problems, the problems identified should be implemented for the responsible units and persons responsible for coming up with feasible deadline for rectification and reform proposals. Functional departments of the rectification of the implementation, feedback and evaluation.
       2, electric  manual block  machinery and equipment for strengthening safety management practitioners. Strengthen education and training, improve operator safety awareness, safety skills to master, compliance, strict compliance with safety procedures and other safety management system.
       3, to strengthen the security of field personnel operating process management. Operation process safety management is in the process of production maintenance operations, through the process elements, the object element, time elements and spatial elements of system control, eliminating that may arise during the operation of the various dangers and harmful factors, to achieve safe production goals the key is to ensure the safety of the whole operation process specification, and reasonable. Process validation system is to require operators to determine, identify, act as a fixed mode of thinking, that is, in the course of operations are recognized by a certain way of operating, thus avoiding accidents.
       4, to strengthen the mechanical hoist equipment management. From the design, manufacture, installation, maintenance and other aspects of strict control, timely elimination of hazards,load chain to ensure intrinsically safe equipment, through technical means to improve the degree of intrinsic safety equipment; equipment body meet safety technical requirements, safety accessory devices should be complete and effective.

Electric hoist crane safety devices

 Electric  lift hoist  crane because of its simple structure, easy operation, low cost, machinery, chemicals, light industry, railways and other industries widely used. Because of this special cranes, ground operations often a person several roles, and also served as operations, company search, command tasks, there are many unsafe operating risks.
       In order to prevent the occurrence of this type of crane lifting injuries, GB6067-1985 "crane safety regulations" and other relevant national standards have to be electric hoist crane must have safety devices, such as limit switch, end stop, bumpers, safety braking devices. These security guards equipped to effectively improve the safety and reliability of electric hoist crane, but because of the design, manufacturing defect itself a variety of reasons, the current electric hoist crane inadequate security measures, according to the daily inspection experience found hoist crane in the wrong phase-phase protection, anti-broken shaft protection against electric  manual hoist  fall protection, buffer settings, etc. are still flawed or inadequate.
       Since using the three-phase asynchronous electric hoist crane conical brake motor as power plant, while the three-phase asynchronous motor rotation direction and the power supply phase sequence, and when the power supply phase sequence is changed, the motor rotation direction and the direction of the original operation Instead, press "down" button, spreader rise, and rise to the limit position limiter does not work, likely to cause accidents. Every year, this type of crane caused due to wrong phase crushed reel, hook group extrusion, wire rope pull off the accident. At present, China produced and widely used CD, MD electric hoist did not take the wrong phase-phase protection measures. To prevent the wrong phase injury accidents caused by lifting,wire rope winch electric hoist crane electrical control system added wrong phase-phase protection.

Use wire rope safety technology

        Wire rope safety technology involves the kind of manufacturing methods, constructors performance, force status, as well as maintenance, inspection, scrap, and many other issues, is a relatively strong professional technology, each security managers and technical personnel should be rope on the knowledge of the situation by force and have a basic understanding of operating status.
        Wire rope electric  rope hoist  is a high usage of components, one of which is due to its unique characteristics of the decision. Compared with the rigid member rope, wire rope with high strength, light weight, good flexibility, impact resistance and other characteristics, particularly outstanding is its safety and reliability.
        In normal use of electric hoist rope generally does not occur suddenly breaking even destruction is also a precursor,wire rope hoist generally always individual, locally broken wire, gradually developed into the whole rope, there is a period of time to process, if rope suddenly broken, because the load exceeds its limit breaking force occurs suddenly destroyed entire rope. This provides such a possibility, as long as usual to strengthen the hoist rope safe management and use, accidents caused by the rope can be avoided. But the rope electric hoist force status changing, complex work environment, and its destruction in addition to mechanical damage, the structure of improper selection,hoist equipment improper maintenance checks, wire rope failure promptly discarded and no other reasons for updates.

The future of domestic wire rope hoist

   (1) wire rope hoist shape design
    Change the traditional circular design, a square structure, the modular design, increasing the versatility of components, from the original arrangement of the motor of an intermediate shaft in the form of a gear of the rolls, the rolls instead of motor-reducer The arrangement not only conducive to effectively improve electric  hoist and trolley  lifting height, and avoid high-speed shaft axis drive, can improve the smooth running and reliability, reduce manufacturing costs. Increase the magnification range of pulleys, improve range of stand-alone use.
    (2) wire rope hoist motor
    Using 2,4,6-pole conical rotor motor for a variety of different conditions. Motor insulation class F class and should be raised to 11, protection class increased to IP54; motor overheat protection device settings; motor should be designed effectively improve the useful power,wire rope winch buck ability and starting and braking capabilities; improve motor design temperature, give full play to the potential of the motor; motor noise in addition to the design, processing, manufacturing to improve accuracy, it should also be considered from the design to reduce electromagnetic noise and wind noise channel eddy current measures.
    (3) Series is designed to rationalize
    Recommended parameters: Capacity from 0.25-80t, lifting height 6-63m, with fewer base model covering the entire series. Lifting speed diversification Recommended values: single speed 8m/min, 10m/rain, 12.5m/min; dual-speed 1/10, 1/3, 1/4 ratio change. Two-speed programs should take picture machine, double windings and pole type, or using frequency conversion stepless speed technologies. Design reference GB3811-1983 "Crane design specifications" working-level division, working-level coverage will be expanded to M3-M6.
    (4) using high-quality high-strength steel wire rope
    According to GB3811-1983 standard, to meet the safety factor of the tensile strength of the premise, to minimize the wire diameter, the use of roll diameter adapted to the diameter of the rope and pulley ratio to the ratio of the diameter of wire diameter in order to facilitate the entire narrow machine structure and weight.
    (5) Optimized gear designed to enhance the carrying capacity of the gear
    Gear can be 40Cr or 42CrMn, 40MnB material, quenched and hardened or nitrided, the original material used 20CrMnTi or 20MnTiB Although the flexural strength of the gear and the contact strength than ideal, but affected by domestic processing level based, gear low precision,manual hoist carburizing quenching deformation difficult to control, after the sequence nor grinding process, it is inevitable there is gear noise, low efficiency. New materials and heat treatment method has many domestic manufacturers to promote.
    (6) Electrical protective measures to increase wire rope hoist
    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-function models such as brake: Dual brake (brake wheel motor brake + high cone axis compensation braking); three brake (brake wheel brake cone axis compensation brake + + high volume cylinder safety gates). According to user needs increased lifting height, load digital display o.

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.

Miniature, electric chain hoist operation details

  Mini electric hoist especially for households with high-rise buildings can be easily lifted from the downstairs heavier daily, and for a variety of occasions, small pieces of crane unloading cargo. Simple structure,hoist and trolley easy installation, small size, and single-phase power as a power source, uses a very wide range of this new electric hoists are widely used in machinery manufacturing, electronics, automotive, shipbuilding, workpiece assembly and high-tech industrial zone and other modern industrial production line , assembly line, assembly, logistics, transportation and other occasions. In warehouses, docks, ingredients, hanging baskets and small work space narrower space operations, can show its good quality. Is a fixed column, wall-mounted jib crane best accessory products.
    Electric wire rope hoist with a compact, light weight, small size, easy to operate. Can be installed separately word overhead beam can also be installed in electric or manual single-beam, dual-beam, cantilever, gantry cranes and other use.
    Electric hoist characteristics: high performance electric hoist, stamping steel shell, lightweight and sturdy.wire rope winch High-strength safety hook to withstand impact of accidental overload fracture does not occur, but the gradual deformation. Limit switch: limit switch hanging under the hanging device, the motor automatically stops to prevent the chain beyond, to ensure safety. Lightweight, attractive and durable molded chain bag. Limit switch: limit switch hanging under the hanging device, the motor automatically stops to prevent the chain beyond, to ensure safety. Reverse phase protection devices: special electrical wiring, when the power connection error, the control circuit is inoperative.
    Electric chain hoist operation test before use:
    (A) does pressing button switch "down" button, the operation gourd hanging down until the limit switches, at which point the motor will stop automatically.
    (B) does the press button switch is "on" button until the chain is completely retracted into the chain bag, and the motor stops.
    (C) Check the lifting chain lubrication oil of any ready-made lifting chain lubrication can be used, we recommend that you maintain a small amount of lubricating the chain bag, so that the chain can be immersed in the lubricating oil.
    (D) When the host of the number of pairs of chain hanging chain or chain,manual block is strictly prohibited under the hook from the chain will flip to avoid hazard.
    (E) Check the chain orientation purposes, all welding points should be in the same direction, only the chain at all welding points are in the same line, the operation determined to completely positive.

Import and export of engineering and hoisting machinery presented five characteristics

This year, the world is facing economic recession, countries hit by the financial storm environment, the country has implemented the macro-control policies, resulting in resource commodities and labor-intensive merchandise exports fall, but due to national infrastructure continuity and long-term, therefore mainly used for infrastructure construction projects and the demand for lifting a limited impact in the near future.
    Meanwhile, the world is facing increasing scarcity of non-renewable resources and food security strategic position valued economic environment, engineering and hoisting machinery in the development of mineral resources and the development of economic activities in the food industry will have its uses, so their needs have greater space for our engineering and  lift hoist  machinery import and export is facing rare opportunities for development, import and export trade has shown rapid growth. Engineering and hoisting machinery import and export features:
    1 Engineering and lifting the fifth consecutive year export growth rate higher than the growth rate of export of electromechanical products.
    Although our engineering and hoisting machinery import and export trade import and export of electromechanical products accounted for the proportion of low, about 2%, but the engineering and  hoist equipment  import and export of general trade, processing trade, lower proportion; most export products own brand and cost competitiveness; obtain national policy support, so construction and agricultural machinery with export base and high growth potential.
    (2) Engineering and lifting the fourth consecutive year trade surplus.
    Engineering and lifting import and export trade deficit before 2004 were started in 2005 to achieve a trade surplus and the trade surplus increased every year. Engineering and lifting a gradual increase product awareness, increase international market share year after year is a major factor in generating trade surpluses. Foreign-invested enterprises and enterprises to innovate products to replace imported products trade deficit into a trade surplus in recent years, another important factor.
    3 Engineering and lifting machinery manufacturers of spare parts for global sourcing.
    At present, 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. Meanwhile, engineering and hoisting machinery parts exports will be more, showing parts manufacturing system into the international trend.
    4 Engineering and lifting substantial growth in exports to emerging markets.
    In the world economy is not stable, when 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 member countries, Africa and other developing regions, ASEAN's exports is still rapid growth.
    5 Engineering and lifting import and export agency still promoted.
    Engineering and lifting with a number of base, technological innovation and strong exports of the main force. These companies have their own brand products, with international leadership and vision to fight international marketing talent, after years of development, has gradually emerged in the international market. But the state of export 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 to take acts of unfair competition also on the "Made in China" products cause adverse effects.load chain As engineering and hoisting machinery import and export urgent need to establish a sound service system, and in the course of personal safety factors involved, we recommend that an appropriate increase in import and export business of barriers to entry.

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.