What's the structural properties of explosion-proof electric chain hoist?

Explosion-proof electric chain hoist is a light and small lifting equipment. Explosion-proof electric chain hoist has light weight, small size and large lifting capacity. When the factory building is filled with explosive mixtures, it is the best way to improve working conditions and increase labor productivity under the premise of ensuring safety. Favorable tools are necessary mechanical equipment for production.

Here is the structural properties details of explosion-proof electric chain hoists for your reference:

• The main characteristics of this series of explosion-proof hoist structure are:

1). This series of products is composed of several parts that can be disassembled separately, and it is very easy to use, maintain and inspect.

2). The control buttons of its explosion-proof motor explosion-proof control box are all separate explosion-proof structures.

3). The parts are widely used and interchangeable.

4). The reducer adopts standard module cylindrical gear is easy to maintain.

• The main components of this series of explosion-proof electric hoist structural features:

1. Reducer

1). The reducer is a three-stage cylindrical gear. The materials of the reducer gear and shaft are made of high-quality alloy steel, and all are equipped with rolling bearings.

2). The casing of the reducer is a high-quality cast iron machining center, which is tightly processed and assembled, and dust is not easy to penetrate.

3). The gear parameters of the reducer are shown in table 2, and the schematic diagram of the transmission structure is shown in the accompanying reducer.

Tonnage, category, gear ratio, modulo, gear 1, gear 2, helix angle, correction coefficient, center distance, transmission ratio, total transmission ratio, pressure angle.

2. Hoisting device

The hoisting device adopts a hoisting sprocket, which is made of cast iron or stainless steel. It is placed in a steel casing and is connected with the reducer by a spline hole, and the other end is connected with the motor end cover by a rolling bearing. The casing is rolled in steel sheet. The chain is tightly meshed with the sprockets and is used to lift heavy objects. The hoisting mechanism is equipped with a hoisting height limit switch to ensure that the power supply of the hoisting motor is cut off in time when the hook reaches the upper and lower limit positions.

3. Travelling mechanism

The operating mechanism of this series of explosion-proof hoists adopts an electric trolley, and its reducer gear is forged with high-quality steel, and after heat treatment, all use rolling bearings. When the lifting height is large, the operating mechanism and the lifting mechanism are connected by joint bearings. To ensure flexible operation, small turning radius, convenient use and long service life, the I-shaped track suitable for the running mechanism should be selected according to the GB706-88 standard.

4. Hook

1). The hook is made of high-quality carbon steel and covered with stainless steel plate as required. It is supported on the hook beam by a single row of rolling thrust bearings and can freely rotate and swing.

2). 1 ~ 5 ton adopts single pulley type hook device, 10 ~ 35 T adopts multi-pulley type hook device, and the hook nut is fixed by pin or card plate structure, which makes it easy to disassemble.

5. Power Inductor

According to the relevant provisions of the national standard GB3836, only flexible cable power inlets can be used. It is absolutely forbidden to use finned, sliding power inlets or pulley inlets with exposed live metal bodies that are prone to sparks.

6. Limit switch

In order to prevent the hook from exceeding the lifting limit position, resulting in the accident of the chain being pulled off, or exceeding the limit position when falling, causing the chain to be confused or the hook to collide with the ground, the lifting height limit switch is used to ensure that the hook reaches the upper limit. When the trolley is at the lower two limit positions, cut off the power supply of the hoisting motor in time to ensure safety; when the trolley is running close to the limit position, a running limit switch should be set to ensure that the running trolley contacts the limit switch to make it actuate immediately after the power is cut off. During the deceleration process It collides with the stop block to ensure safety.

7. Explosion-proof motor

This series of explosion-proof electric hoists explosion-proof motors are specially manufactured fully enclosed explosion-proof three-phase asynchronous motors. The maximum torque of the explosion-proof motor is 2.4 times the full load torque. In order to adapt to the direct starting of explosion-proof hoist to continue working.

The explosion-proof motor of this series of explosion-proof hoists has its own brake. When the motor is powered off, the explosion-proof hoist can be stopped in a short time. The shell material of the explosion-proof motor for hoisting and running is made of HT250 cast iron. After processing, a static pressure test of 1.5MPa and a duration of at least 10s is carried out. Assembly can only be carried out after passing the qualification.

 8. Manipulator

The lifting and lowering of this series of explosion-proof hoists and the action of the electric trolley are all controlled by the explosion-proof button to control the AC contactor, and the control circuit adopts 36V DC safety voltage. When the hook lifts to the limit size, the explosion-proof limit switch cuts off the main circuit power supply of the lifting motor. When the hook rises to the limit position, as long as the lower button is operated to lower the hook, or when the hook falls to the lower limit position, as long as the lift button is operated to raise the hook, the contacts of the travel switch can be restored.

Actually, as top manufacturer, our company has been committed to providing customers with high-quality products and thoughtful service. And mainly provide jib cranes, overhead cranes, gantry crane and hoists. Any questions, please feel free to contact us .