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Mainly because the  electrical wire rope hoist  is not connected to rated working voltage and can not work, generally have the following situations 1.The power supply system output to  electric wire rope hoist  control box or not, generally used test pencil to test. 2.The main control loop of the  electric rope hoist  control box is damaged, line disconnection or poor contact, or the line of the control button is bad, will also make the hoist motor no electricity. When this kind of circumstance appeared, need to maintenance the main control circuit and the control button. Maintenance, in order to prevent burning motor caused by main power supply and control circuit for three-phase motor lack of phase,  electric hoist motor  or hoist damaged by suddenly running, must disconnect hoist motor from the power supply circuit, only output to the main control circuit. After the control button on the line, press the start and stop switch, check the work condition of the electrical and wirin

1.The appearance of the  overhead EOT crane : comprehensively clean the appearance, no dust. Check for cracks, open welding. 2.Check and tighten transmission shaft seat, gear box, coupling, shaft and key is loose or not; check and adjust the brake wheel clearance to make it uniform, sensitive and reliable. 3.Check the  overhead crane  reducer mainly to see whether the oil leakage. If the box has abnormal sound when running, it is necessary to open the box cover to check. Generally due to bearing damage or gear meshing backlash is too large, tooth surface wear. 4.Lifting winch: check the wire rope and pulley hook is safe and reliable, if wear over the specified value should be replaced. Check and adjust the brake to make it safe, sensitive and reliable. 5.Inspection of steel wire rope for  double girder eot crane . Check the wire rope should focus on the observation of broken wires, wear, kink, corrosion etc., make a mark to some serious wear, broken wires but not exceed the standard po

Wire rope electric hoist  as a light small lifting equipment, widely used in various fields of national economy, while the development of China wire rope electric hoist in recent years is very slow. At the beginning of 1970s, China imported the TV type wire rope electric hoist from the Soviet Union, then we designed CD type  wire rope block  to replace the TV type wire rope electric hoist, so far CD type wire rope electric hoist has reached 30 years of history in manufacturing. In the meantime, there were some manufacturers to introduce foreign advanced manufacturing technology, but did not get a wide range of application. The development of  electrical wire rope hoist  technical level in the China is slow, the reason is many aspects of the: 1.China steel wire rope electric hoist production, manufacturing level and the supporting machinery, electrical and standard parts technology is low; 2.Over the past 20 years, the China economic system from the planned economy to the market ec

1.A new installed or after dismantling electric hoist, should first be empty test run several times. But before the installation is completed, do not do electricity test. 2.Should be carried out in the normal use of the rated load of 125%, up from the ground about 100 mm, 10 minutes of static load test, and check the  electric chain block  is normal or not. 3.Dynamic load test is based on the rated load weight, for repeated movements and move around the test. After the test, check the mechanical transmission part, electrical part and the connection part is normal and reliable. 4.Not allowed to use under the environment of absolute prohibition, or exceed the rated load and rated closing times per hour (120). 5.During installation and maintenance, must strictly check the limit device is flexible and reliable, when a hook rises to an upper limit position, the distance between the hook shell to the drum shell must be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the ho

Electric chain hoist motor is the important part of the whole equipment, WOKAITE have today’s achievement in crane field, can’t be separated from selected materials and exacting standard, the following introduce you electric 1 ton chain motor selection standard. Ring chain hoist motor with class F insulation. When the elevation and the ambient air temperature is in conformity with the provisions, the motor winding temperature ceiling value of resistance should not exceed, the allowable bearing temperature (temperature) should not be more than the ring chain electric hoist lifting the rated load, when the terminal voltage of the 1 ton chain motor for rated voltage of the agencies can work normally, for conical rotor motor and disc brake motors and residual magnetic pull. When the three-phase power supply is in balance, the deviation of the average value of three-phase 1 ton chain motor no-load current of any one phase of three-phase should not exceeding three ring chain electric

Electric hoist with compact structure, electric hoist which motor axis is perpendicular to the drum axis adopts a worm gear transmission device. The disadvantage of large length and width, heavy mechanical structure, low efficiency, difficult processing. The hydraulic system is a double control, the overflow control valve and the magnetic contact pressure gauge can control the pressure accurately. Electrical control department adopts low voltage control, increase the safety of the control system, theree is no factory to produce this kind of structure type of products. Structure and features: the machine adopts the mechanical and electrical integration design, you can press different specifications of the steel wire rope by changing different mold, simple and safe control. The hoist motor  is parallel to the drum axis, and the electric wire rope hoist has the advantages of small height and length. The disadvantages are large size, poor grouping, complex manufacturing and assembly.

The motor shell are equipped with a nameplate, marked with motor type, specification and relevant technical data. The nameplate should not be lost, it is convenient for us to use and maintenance the crane duty motors . The following is the meaning of main content on the nameplate: 1.Model: the structure of the crane duty motor, the number of poles, and the rotor type, etc.. 2.Power: also called the capacity, indicating that the maximum allowable mechanical power output through the axis of the long-term work crane duty motor, it marks the operating capacity of the motor. Such as the rated power of 11 kilowatts, that is, when the load is less than or equal to 11 kwh, the motor can work properly. 3.Voltage: refers to the motor stator windings used in the power supply line voltage, also known as the rated voltage. 4.Current: refers to the motor at rated running, the the line current flow into the stator windings, also known as the rated current. 5.Rotating speed: the speed of the crane dut

Electric chain hoist can not be avoided failure in the use, the following we have to do a summary of the motor failure. Motor burned mostly because of lack of phase or the temperature is too high. In view of these two kinds of common reason, WOKAITE technical staff has carried on the summary for the general customers safe use. Electric chain hoist for a long time of continuous work, resulting in motor overc operation rate, and may not have good lubrication, causing the temperature is too high, so the motor will be burnt. Contactor and fuse failure, line contact error, also can cause the motor lack of phase. The following is a common cause of motor faults and solutions: 1.Power line phase error, resulting in the role of phase protection to start, so it can not be operated. Solution: the power line two phase on each other. 2.The power of the fuse or no fuse switch off. Solution: check whether the current demand, the replacement for the fuse or restart no fuse switch. 3.Fuse of contr

Usage method 1.Select the appropriate size of the manual lever hoist to use, no overloading. 2.Do safety check and no-load test before using the manual lever chain hoist , according to the actual requirements of reasonable adjustment under the hook position. 3.Hook adjusting method: flipping a shifting block, the shifting block in the N position, anticlockwise pull out the hand wheel. At this time, the clutch is in open state, pull the chain can easily adjust the position of the hook, and after the end of the adjustment should be clockwise rotate the handwheel to ret. 4.After adjustment the weight hanging in the middle position under the hook, the handle can achieve weight lifting. Maintenance method 1.After use the manual lever hoist should be cleaned, and coated with rust proof grease, stored in a dry place. 2.The maintenance and repair should be carried out by the professional staff. 3.Gear installation according to the drawing operation. 4.When the groove type nut is installing

Manual chain lever hoist is widely used in shipbuilding, electric power, transportation, construction, mining, telecommunications and other industries equipment installation, lifting items, mechanical stretch. Manual chain lever block has the advantages of safe and reliable, durable, good performance, easy maintenance; small volume, light weight, convenient to carry, small manualforce, high efficiency, improve the structure, beautiful appearance. manual hoist is used to enhance the weight of manpower, not arbitrarily extended operating manualle; operation should allow the rest of the manualle freely with the move, not blocking. Must be based on the load to choose the appropriate tonnage of the chain lever block. With the provisions of models, specifications of the steel wire rope to fix the chain lever hoist . The material of wire rope hoist is generally metal synthesis, so the maintenance must be done in a comprehensive, so that the normal use of the device will not be affecte

Lever hoist 1.5 ton is also known as reverse chain, is a manual lifting tool for the heavy class work. The 6 ton lever hoist is a lifting tool which is driven by manpower through a handle to drive the chain to drive the movement of the fetching device. It has the advangtages of compact structure, easy to carry, easy to operate, suitable for remote areas and the field of lifting, drag and pull operations, but also to enhance and pull distance is not restricted, can be determined by the length of the chain. Chain lever block scope of application: it is widely used in shipyard hull assembly welding, electric power department of HV transmission line joint taut, forestry, transportation department of lifting the car, lashing materials, vehicle drag cited and factory Department, equipment installation, adjustment. Chain 1.5 ton lever hoist structure is advanced, safe and reliable, durable. The whole efficiency is high, the operation is simple and comfortable. Small size, light weig

1.Overloading is strictly prohibited, no unauthorized extension of the use of the handle, no use other than human power operation. 2.In lifting lifting, any work or walk under the weight are forbidden, prevent the occurrence of accidents. 3.Must confirm the parts intact before use, transmission parts and lifting chain lubrication good, normal idling. 4.Should check the upper and lower hook is hanging before use. The load on the central hook hook cavity. Lifting chain without wrong twisting and bending links, to ensure the safety. 5.When used, if you find the hand pulling force should be stopped immediately, and check: A. Weight and other objects are implicated or not. B. 3 ton lever hoist parts for damage or not. C. Weight is beyond the rated load of hoist or not. 6.No illegal operation, no gourd placed in the rain or very wet places. 7.No gourd hook flipping in the middle of the chain. 8.Should do a good job in 3 ton lever chain hoist safety inspection before use, including the jaws

When 1 ton manual chain hoist lifting the weight, clockwise drag manual and rotate hand chain wheel; while down, counterclockwise hands pulled the chain, brake block and brake separate, ratchet resting under the effect of the detent, five tooth long axis drive heavy chain wheel running in the opposite direction, so as to smooth dropped weights. 2 ton manual chain hoist generally use the unidirectional ratchet friction disc brake, can automatically brake under load, the pawl and the ratchet wheel are engaged under the action of the spring, ensure the brake work safely. It is safe and reliable, convenient maintenance, high mechanical efficiency, bracelet pull small, lighter weight for carrying and beautiful shape smaller sizes, durable, applicable to factories, mines, construction sites, piers, docks, warehouses and other used to install machinery, lifting goods, especially for the open and no power operation, show its superiority. The main parts of 3 ton manual chain hoist use the s

1.After use the manual chain hoist block should be cleaned and coated with antirust grease, stored in a dry place to prevent the manual hoist damp rust and corrosion. 2.Maintenance and repair should be operated by professional staff, cleaning manual hoist chain pulley block parts with kerosene, add butter lubrication in gears and bearings. 3. Chain pully block after cleaning and maintenance, should be carried out in the no-load test, to confirm the normal operation, can be delivered to use only if the brake is reliable. 4.The friction surface of the brake must be kept clean. Brake parts should be checked regularly to prevent the brake failure and the occurrence of heavy load from falling. 5.The chain pully block lifting sprocket around bearing roller, the grease can be adhered to the bearing inner ring which is pressed on the neck of the lifting chain wheel shaft, then the bearing outer ring into the wall. 6.When in the installation of the brake part of the manual hoist chain pulley

1.No overload use. 2.Non use of human power other than the operating 1 ton chain block . 3.To confirm parts intact before use, driving and hoisting chain of good lubrication, normal idling. 4.Check hook is hanging in prison before lifting, heavy chain should be vertical suspension, without twisting the wrong link, double chain hook frame shall not turn. 5.The operator should stand in the same plane with the hand chain wheel to pull hands chain, so that the chain wheel clockwise rotate, you can make the weight rise; pull the chain reversely, heavy weights can slowly decline. 6.In lifting weights, prohibited personnel to do any work or walk under the weight, so as to avoid the occurrence of accidents. 7.In the lifting process, regardless of weight up or down, the force should be uniform and gentle when pulling the chain, so as not to hand chain jumping or snap ring. 8.If the hand pull is larger than normal, the operator should stop using the hand pull. To prevent damage to the int

1.Aluminum bronze or beryllium bronze as the blank, hand pull gourd shell using H62 copper alloy material. 1 ton chain fall can be used in flammable and explosive occasions, such as chemical industry, sea and other operations. 2.The rotary gear 10 ton chain fall s after high temperature heat treatment, so as to achieve a very high wear resistance. Manual chain hoist with small pulling force, light weight, easy to carry, beautiful appearance, small size, durable. 3. 20 ton chain fall work principle: by trolling dynamic bracelet, hand chain wheel begins to rotate, friction slices ratchet wheel and brake block begin to rotation, five tooth long axis of rotation gear, four teeth short shaft and spline hole gear. Thus, the lifting chain wheel on the spline hole gear drives the heavy chain to lift the heavy load smoothly. Manual chain hoist is mainly used in factories, mines, construction sites, piers, docks, warehouses and other places, for the installation of machinery, lifting goods,

The end carriage plays an important role in the EOT crane , which is the key component of the load shifting and transportation. End carriage is composed of wheel and frame, end carriage part is mainly composed of the cover,web and bottom cover plate; end carriage is formed by two segments through a connecting plate and angle steel with high strength bolt connection. A reinforcing rib is arranged in the inner of the end carriage to ensure the stability when load. Main dimensions of the end carriage is determined according to the span of the main girder, the track of the cart and trolley; the operation of the cart is driven by the separately driven scheme.When assembling the crane, firstly connect one section to one of the main carriages, and then connect the two section of the end carriage together.

Overhead crane double girder is the main stress components in EOT crane by about two webs, upper and lower cover plates and a number of large and small plates and stiffened plates. Main technical requirements Arch degree of the main overhead crane double girder: When the load is carried, the deflection can be offset by the deformation under the condition of the main girder, so as to avoid the carrying trolley climbing. Main girder side change: In the manufacture of bridge. After the side welding with drawing residual stress, when the transport and use the release of residual stress, resulting in two main girders of the inward side bend; and the main overhead crane double girder under the horizontal inertial load, according to the stiffness conditions allow have certain lateral bending, both stack and caused by bending deformation. Usually by stiffness and strength condition, and the cross-sectional area is smallest, which can satisfy the construction requirements (such as th

For the double girder eot crane of high lifting weight, high work level and high operation speed, generally use of cab control mode, to ensure the safety. The cab is usually fixed on one side of the bridge. If the span of double girder overhead cranes is large, and in complex lifting situations, can select the mode of the cab moving with lifting trolley. Sometimes can also choose the mode of that the driver room can move along the main beam, the operation can be more convenient. In the situation of double girder overhead cranes running slow, short stroke, work is not busy, and asked the driver directly linking or picking the hook; in the situation of which plant is low or ground equipment is high or can not be installed the cab; in the situation of harmful gases in the upper part of the plant, that can not operate on the EOT crane , can use ground control. The operating speed of the ground handling crane is generally not more than 45 m/min. According to the need to use several ways s

With the continuous improvement of the level of production automation, Single girder eot crane can make full use of space, has been used as a carrying robot, and become one of the key equipment of material handling automation. The update and development of single girder overhead cranes , depends on the improvement of automatic control and electric drive. Experts estimate that 20% ~ 30% of the bridge crane need to install automation system in the future. For the single girder overhead cranes with automatic grab goods function, in order to accurately handling the goods, improve production efficiency and prevent spreader motion can not effectively positioning, should generally be selected anti shake function of the spreader. Sling anti swing with mechanical type, hydraulic type, electronic type and rigid guide rod type and other types, somecountries have developed a kind of fuzzy logic control technology to achieve the best anti swing control. In some special occasions, such as the l

Mainly because of the hoist does not reach to the rated operating voltage, there are generally 3 kinds of situations: 1.Find out whether the power supply system supply power to wire rope electric hoist , generally used test pencil, such as no power supply; 2.The main control circuit of the wire rope electric hoist is damaged, the line is broken or the contact is bad, can also let the hoist motor not be electrified. This situation, need to overhaul the main control circuit. When maintenance, in order to prevent missing phase to burn the motor casused by the main control circuit supply power to three-phase motor, or hoist motor suddenly operate and cause danger, must disconnect electrical wire rope hoist motor from the power supply, only supply power to the main control circuit. Then start and stop switch, check and analyze the working condition of the electric appliance and the line, repair or replace the failed electric appliance or line. When the main control circuit is confirmed

The electric wire rope hoist is composed of a motor, a transmission mechanism, a drum and a steel wire rope. According to different positions of drum and motor, it can be divided into four different types. 1. Wire rope hoists motor axis perpendicular to the drum axis by the worm gear transmission device, large width, heavy structure, low mechanical efficiency, difficult to processing. Almost no manufacturers to produce this type of wire rope hoist . 2.The monorail electric wire rope hoist which is parallel to the axis of the electric motor has the advantages of small height and length. Its disadvantages are large size, grouping, manufacturing and assembly. The track turning radius is large. 3.The motor installed in the drum inside the wire rope hoist, which has the advantages of small size, compact structure. The main disadvantages is the poor motor cooling conditions, poor grouping, and the inspection, installation, maintenance of motor inconvenience, power supply device is

Electric cable hoist is a small lifting equipment, has the advantages of compact structure, light weight, small volume, high universality of the components, convenient operation and so on, it can separate installation in I-steel, can also supporting the installation used in electric or manual single beam, dual beam cantilever gantry crane. General use of the cone type motor, automatic lock brake stop. Mainly used for a variety of infrastructure engineering machinery and equipment to promotion, transfer, loading and unloading heavy objects, tank flip chip bonding, such as all kinds of large and medium-sized concrete, steel structure and mechanical equipment installation and removal for in construction and installation companies, factories and mines of civil engineering and bridge construction, electric power, shipbuilding, automobile manufacturing, construction, highway, bridge, metallurgy, mines, slope tunnel, well control protection.

1.The first installation or reassembly of wire rope blocks , should be carried out no-load operation, but to ensure that the components must be installed, do not power. 2.Should be carried out in the normal use of the rated load of 125%, up from the ground about 100 mm, static load test for 10 minutes, and check whether it is normal. 3.Dynamic load test is based on the rated load weight, for repeated movements and move around the test, after the test to check the mechanical transmission part, electrical part and the connection part is normal and reliable or not. 4.Do not allow to use under the absolute prohibition environment, and exceed the rated load and rated closing times (120) per hour. 5.When installation, debugging and maintenance, must be strictly check the limit device is flexible and reliable or not, when the hook up to limit high position, distance between hook shell and the drum shell must greater than 50mm (10t and 16t, while 20t must greater than 120 mm). When th

Electric rope hoist is a small lifting equipment, has the advantages of compact structure, light weight, small volume, strong versatility, convenient operation and so on. It can be installed separately in I-steel, can also be fitted for use in electric or manual single girder, double girder, cantilever and gantry crane. Wire rope is the key component of the electric wire hoist lifting mechanism, it has a direct impact on safety of electric rope hoist, often scrapped because of abrasion and fracture, so should always in good lubrication condition, and regularly check the end is fixed or not. When the wire rope should be scrapped when reaches the circumstances specified in the GB5972, and timely replace the rope. Electric wire hoist maintenance 1.In daily inspection, monthly inspection and yearly inspection, which does not meet the requirements should be repaired, adjusted or replaced parts immediately. 2.Electric wire hoist maintenance requirements: A) Replacement parts shoul