Electro-hydraulic control system of disc type braking device of mine belt conveyor

Abstract

An electro-hydraulic control system of a disc type braking device of a mine belt conveyor comprises a power part and an execution part, wherein the power part is communicated with the execution part through a one-way valve and achieves electro-hydraulic control on the disc type braking device through a programmable logic controller (PLC) program. The power part is divided into three paths, wherein one path is a hand pump, each of another two sets consists of an explosive-proof motor and a plunger pump, and each path independently returns oil through an electro-magnetic proportional over-flow valve and a magnetic exchange valve. The execution part is divided into at least two execution return circuits through one-way valves, wherein each execution return circuit is divided into two paths through a one-way valve, one path of each execution return circuit is connected into a hydraulic cylinder of a brake head, and the other path of each execution return circuit is communicated with an oil tank through a throttle valve, a magnetic exchange valve and an electro-magnetic proportional over-flow valve. The electro-hydraulic control system is composed of the three paths of power sources, automatic switching control is achieved, reliability and stability of the system are further improved, the system structure is instantaneously controlled, energy consumption is reduced, and the service life of the device is prolonged.

Description

technical field [0001] The invention relates to a disc brake control device for a belt conveyor, in particular to a multi-circuit instantaneous electro-hydraulic control system for the disc brake device of a belt conveyor in a coal mine. Background technique [0002] The belt conveyor is the only continuous transportation device with the largest coal conveying capacity, the highest efficiency, and the most economical in the existing coal mine. The disc brake device is a key component of the existing belt conveyor to realize the safety and automatic control. Its system Whether the function is perfect, the performance is good or bad, and the length of the braking input time directly affects the safe and reliable operation of the belt conveyor. [0003] However, there are also some shortcomings in the use of disc brakes in belt conveyors in coal mines: first, several pairs of brake heads return oil uniformly. If the belt conveyor starts and the oil circuit is blocked, it wi...

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Problems solved by technology

[0003] However, there are also some shortcomings in the use of disc brakes in belt conveyors in coal mines: first, several pairs of brake heads return oil uniformly. If the belt conveyor starts and the oil circuit is blocked, it will cause braking The head cannot be opened normally, which affects normal work; if the oil circuit is blocked during braking, it will not be able to return the oil, cannot brake, and an accident will occur, which will cause serious loss of life and property; secondly, in the belt conveyor During normal operation, the motor and oil pump are always in working condition to provide pressure for the brake head, and the long-time working system seriously affects the service life of the motor and pump

Before the system is used, the system must first charge the accumulator; the gear pump always works with the roller during the working process, and the service life of the gear pump is greatly affected; a unified circuit is used to return oil, and when the circuit is blocked, the impact normal working of the system

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