A hydraulic control system and control method of a coal mine underground cement foaming machine

Abstract

The invention discloses a hydraulic control system and method for an underground coal mine cement foaming machine. The hydraulic control system comprises a main machine motor and a hydraulic station motor. The main machine motor drives a first pump and a second pump through a coupler. The first pump controlsa pumping system;and the second pump controlsa foaming system. The hydraulic station motor drives a third pump, a fourth pump and a fifth pump through a coupler. The third pump controls a stirring system;the fourth pump controls a screw feeding system; and the fifth pump controls a water supply system. According tothe pumping system, when the stroke of a pumping oil cylinder approaches the terminal point, control oil opens a logic valve by means of the pressure difference, a pilot oil controlled valve is reversed through the output control oil, a main reversing valve is reversed through main reversing valve control oil controlled by the pilot oil controlled valve, and switching over of the two pumping oil cylinders is achieved. A part of an electrical control system is changed into the hydraulic control system, electric driving is changed into hydraulic driving, actions except for starting and stopping of the motors are manually or hydraulically controlled automatically, and the equipment anti-explosion requirement is more easily met.

Description

technical field [0001] The invention belongs to the field of mining machinery, and in particular relates to a hydraulic control system and a control method of an underground cement foaming machine in a coal mine. Background technique [0002] At present, there are 5 driving motors for the existing ground cement foaming machine, which respectively control the 5 systems of pumping, foaming, mixing, cement transportation, and water supply. There is a relatively complicated electronic control system, and each system is indispensable. of. Due to the explosion-proof requirements for mining electromechanical products, the construction measures of more than two motors on one set of equipment will be very troublesome, and there are high potential safety hazards. Therefore, it is neither safe nor convenient to use ground equipment in coal mines. [0003] In addition, the ground equipment relies on the proximity switch to send a signal, and the electric control system controls the sol...

AI Technical Summary

Problems solved by technology

When used in underground coal mines where there is explosive gas, complex explosion-proof measures are required, which increases the difficulty and danger of operation.

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