Automatic foam injection system and method for preventing cutting sparks of coal mining machine

Abstract

The invention discloses an automatic foam injection system and method for preventing cutting sparks of a coal mining machine. The system comprises a foam generating device for preparing foam and a control device for controlling automatic injection of the prepared foam, the foam generating device comprises a foaming liquid proportioning mixer, a gas-liquid mixer and a foaming liquid storage tank, one end of the foaming liquid proportioning mixer is connected with a high-pressure water pipe, the foaming liquid proportioning mixer is connected with the foaming liquid storage tank through a liquid suction pipe, and the other end of the foaming liquid proportioning mixer is connected with the gas-liquid mixer; the gas-liquid mixer is further connected with a high-pressure gas pipe, and an outlet of the gas-liquid mixer is connected with a foam nozzle through a foam liquid conveying pipeline; control valves are arranged on the high-pressure water pipe, the high-pressure air pipe and / or the foam liquid conveying pipeline; the control device comprises a spark detector and a controller, the spark detector is connected with the controller, and the controller is connected with the control valve. Sparks appearing at the coal cutting roller can be extinguished in time, and fire disasters are prevented.

Description

technical field [0001] The invention relates to the field of underground fire-prevention and fire-extinguishing equipment, in particular to a foam automatic injection system and method for preventing and controlling cutting sparks of coal shearers in underground working faces. Background technique [0002] With the widespread use of shearers, the probability of fire accidents caused by friction sparks on the coal mining face is greatly increased. During the coal mining process of the shearer, sparks and frictional heat are continuously generated due to the collision or friction between the shearer pick and the sandstone or pyrite nodules in the coal seam or in the top and bottom floors, and the splashing high-temperature sparks are very easy to cause work. Surface gas burns and may cause mine fires or gas explosions. [0003] The Chinese invention patent with the application publication number CN108691543A discloses a cutting inner spray device of a continuous shearer, whic...

AI Technical Summary

Problems solved by technology

The device adopts the spraying method, the main purpose is to suppress the excavation work flour dust, and the prevention and control effect on the cutting spark is not outstanding, and the device needs to continuously spray the working pick, and the operating cost is relatively high

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