Brief introduction Common winch tonnage is: 0.3T winch 0.5T winch 1T winch 1.5T winch 5T winch 6T winch 8T winch 10T winch 15T winch 20T winch 30T winch. From the point of view of whether it meets the national standards, hoists can be divided into national standard hoists and non-standard hoists. The national standard winch refers to the winch that meets the national standard, and the non-standard winch refers to the winch whose standard is defined by the manufacturer. ) Usually, only manufacturers with production certificates can produce national standard winches, and the price is more expensive than non-standard winches. Common winch models are: 1, JK0.5-JK5 single drum fast winch 2, JK0.5-JK 12.5 single drum slow winch 3, JKL 1.6-JKL5 fast winch 4, JML5, JML6, JML 10/. 2Jk2-2jmL 10 double drum hoist 7, jt800, jt700 explosion-proof hoist 8, Jk0.3-JK 15 electric hoist 9, JM0.3-JM50 electric hoist 10, nonstandard hoist, where JK stands for fast hoist and JM stands for fast hoist. Special winch models are: hydraulic winch has many advantages over traditional electric winch (electric winch): 1. Overload protection II. Impact protection 3. Precautions for explosion-proof performance: 1. The wire rope on the drum should be arranged neatly. If overlap and oblique winding are found, stop and rearrange. Hands and feet are prohibited from stepping on the wire rope during rotation. Wire rope is not allowed to be completely paid out, and at least three turns should be reserved. 2. The wire rope is not allowed to be knotted or twisted. If the broken wire exceeds 10% within a pitch, it should be replaced. 3, homework, no one may cross the wire rope, objects (objects) after ascension, the operator shall not leave the hoist. When resting, the object or hanging cage should be lowered to the ground. 4. During the operation, the driver and signalman should keep good visibility with the hoisted object. Drivers and signalmen should cooperate closely and obey the unified command of signals. 5. In case of power failure during operation, cut off the power supply and lower the lifted object to the ground. 6, work should listen to the commander's signal, the signal is unknown or may cause an accident should be suspended, to find out the situation rear can continue to work. 7. In case of sudden power failure during operation, immediately pull open the knife and put down the conveyor. 8. After the operation, the tray should be landed and the electric box should be locked. [1] Reasons for the huge noise ① The chassis adopts a box structure, not all welds are continuously welded, and the length and height of each chassis weld are different, so there are great individual differences in the rigidity of the chassis, and some of them will produce * * * ringing effect, and any vibration noise of the machine will be amplified; (2) The chassis is welded by steel plates, and it does not have the function of shock absorption and noise elimination. If its natural frequency is close to the meshing frequency of the gear, the vibration of individual machines may be larger due to the weak vibration of the gear, which may lead to the increase of noise value. Classification and different features of winches include building winches. The main products of coaxial winch are: JM electric control slow large tonnage winch, JM electric control slow winch, JK electric control high speed winch, JKL manual control fast running winch, 2JKL manual control double fast running winch, JT speed regulating winch, KDJ micro winch, etc. They can only be used on the ground and can also be used on ships by modification. Driven by motor, elastic coupling, three-stage closed gear reducer, tooth-embedded coupling and electromagnetic braking. This product has high versatility, compact structure, small volume, light weight, heavy lifting, convenient use and transfer, and is widely used for lifting or dragging materials in buildings, water conservancy projects, forestry, mines, docks and so on. It can also be used as supporting equipment for modern electronic control automatic production line. Jm series is a crane driven by gear reducer. Mainly used for lifting, pulling and unloading, pushing and pulling heavy objects. Such as the installation and disassembly of various large and medium-sized concrete, steel structures and mechanical equipment. It is suitable for civil engineering installation of construction and installation companies, mining areas and factories. A device that uses human or mechanical power to drive the drum and wind the rope to complete the traction work. Coaxial winch: (also called mini winch) The motor and wire rope are on the same transmission shaft, which is light and compact and saves space (its tonnage includes (200 kg, 250 kg, 300 kg, 500 kg, 750 kg, 1000 kg, etc.). ) slow winch: the rated speed of the wire rope on the drum is about 7~ 12m/min. Fast winch: The rated speed of the wire rope on the drum is about 30m/min. Electric hoist: a hoist driven by a motor and rotating the drum through a driving device. Speed regulating winch: a winch with adjustable speed control. Manual winch: a winch that is powered by human power and rotates the drum through a driving device. Large-tonnage nonstandard crane: mainly used for lifting, pulling and unloading, pushing and pulling heavy objects. Such as the installation and disassembly of various large and medium-sized concrete, steel structures and mechanical equipment. Its structural feature is that the steel wire ropes are arranged neatly, and it can be installed reliably by crane. It is suitable for the installation equipment of road and bridge projects such as docks, bridges and ports and large factories and mines. It is to use an external force (such as a motor) to drive him to run, and then use electromagnetic brakes and locking brakes to control him not to run freely without power. At the same time, the motor drives him to slow down and then drives an operation, on which a cable or other things can be wound. Usually, hoists that lift more than 30 tons are large-tonnage hoists. There are only a few hoists with large tonnage in China, and the current maximum tonnage is 65 tons. It is mainly subdivided into JK (fast), JM, JMW (slow), JT (speed regulation), JKL, 2JKL manual fast winches and other series, which are widely used in lifting industries such as mining, metallurgy, lifting, construction, chemical industry, road and bridge, and water and electricity installation.
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