Frequency conversion type automatic tension device of extension band type conveyor

Abstract

The invention relates to a frequency conversion type automatic tension device of an extension band type conveyor, comprising a roller, a roller frame, an abdominal ring, a fixing plate, a terminal subassembly, a bearing subassembly, a coupling sleeve, a drive shaft, a speed reducer, a brake, a coupling, a variable-frequency motor, a hydraulic mechanism and an electric cabinet. The frequency conversion type automatic tension device of an extension band type conveyor adopts the design that a retracting roller and a double-planet bevel gear are used for changing directions and speed, a unidirectional wet brake is used for braking, and frequency-conversion speed regulation and hydraulic power are combined, the tension device can be automatically controlled to change speed and directions, brake and wind wire cables, and the like, the electric cabinet is controlled by a microcomputer processor, and a sensor acquires functional information. The frequency conversion type automatic tension device of an extension band type conveyor has advanced design, compact structure, convenient operation and use, high strength and large force, is safe, stable and reliable, and can effectively control the roller to rotate, change the speed and the directions, reinforce the retracting ability and satisfy the tension requirement of the extension band type conveyor under the conditions of long conveyingdistance, large conveying quantity and high speed.

Description

technical field [0001] The invention relates to a variable-frequency automatic tensioning device of a telescopic belt conveyor, which belongs to the technical field of design and manufacture of parts of underground coal transfer equipment in coal mines. Background technique [0002] In large and medium-sized coal mines, the transportation of coal is completed by telescopic belt conveyors. Due to the harsh environment of coal mines, the telescopic belt conveyors are used in different working conditions such as starting, running, braking, emergency stop, and power failure. When the driving roller is separated, the required tension at the separation point of the driving roller is different, which requires that the automatic tensioning device at the separation point of the driving roller should provide different tensions according to different working conditions, and the tension adjustment speed should also be different, especially in emergency stop or disconnection. In the case...

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Problems solved by technology

[0002] In large and medium-sized coal mines, the transportation of coal is completed by telescopic belt conveyors. Due to the harsh environment of coal mines, the telescopic belt conveyors are used in different working conditions such as starting, running, braking, emergency stop, and power failure. When the driving roller is separated, the required tension at the separation point of the driving roller is different, which requires that the automatic tensioning device at the separation point of the driving roller should provide different tensions according to different working conditions, and the tension adjustment speed should also be different, especially in emergency stop or disconnection. In the case of electricity, the one-way brake should be opened quickly. If the one-way brake cannot be opened, the tension at the separation point of the conveyor driving roller will be too high, and it will not be able to be adjusted automatically, which will damage the equipment.

[0003] At present, the automatic tensioning device used in China cannot adjust the speed and cannot meet the requirements of the conveyor for tension adjustment. When the power is cut off, the tension at the separation point of the conveyor driving roller is too high, which can easily cause broken belts or damage the automatic tensioner. device, the current tensioning device cannot achieve self-protection and protection of the conveyor in this case

[0004] With the extension of the coal mine working face, the telescopic belt conveyor develops in the direction of long transport distance, large transport capacity, and high speed, even greater than 3000 meters. The dynamic change of the tension at the separation point of the driving roller becomes more complicated, and the tension of the tensioning device The requirements are higher, and the currently used tensioning device can no longer meet the needs of tension under the conditions of long distance, large volume and high speed.

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