Coal mine underground fan anti-reversing device

Abstract

The invention discloses a coal mine underground fan anti-reversing device. The coal mine underground fan anti-reversing device comprises an iron fan, a support rod, two semi-circular anti-reversing cover plates, a stopping rod and a rotating shaft, wherein the support rod is vertically arranged inside the iron fan; the anti-reversing cover plates are arranged on both sides of the support rod and hinged to the support rod; the stopping rod is arranged on one side of the anti-reversing cover plates, which is closed to the air inlet of the iron fan. During normal ventilation under a coal mine, the anti-reversing cover plates inside the iron fan can be automatically opened under the air pressure of a local fan, and the iron fan normally supplies power; when a gas accident happens, abrupt gas pressure is higher than the air pressure generated by the local fan, and under the pressure of the abrupt gas, the anti-reversing cover plates can be closed to block the iron fan and further reversed gas. Therefore, the coal mine underground fan anti-reversing device can effectively solve the problem that, when gas explosion accidents under the coal mine take place, high-concentration gas can reversely flow into fresh air via the iron fan to result in death by suffocation, thereby ensuring personal safety to the maximum degree and avoiding secondary disasters caused by accident diffusion.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to an anti-reverse device for an air duct used in underground coal mines. Background technique [0002] Coal and gas outburst is a safety accident that is prone to occur in coal mines. The high-concentration gas gushing out of coal and gas outburst will cause disasters such as gas combustion and explosion when it encounters a fire source. In this case, the outburst high-concentration gas passes through iron. The air duct counter-flows into the fresh air flow, endangering the personal safety of the personnel in the fresh air flow, and causing death by suffocation. Therefore, it is necessary to propose a new type of air duct anti-reversal device for underground coal mines, which is used for local ventilators in coal mine anti-outburst working faces On the air duct, it can prevent the coal and gas outburst accidents in the mine from causing the wind flow to reverse, and can qu...

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the present invention is to provide an anti-reversal device for the air duct used in underground coal mines, which is used to solve the problem that when a gas explosion accident occurs underground in a coal mine, the high-concentration gas flows back into the fresh air flow through the iron air duct, endangering the personnel in the fresh air flow. Personal safety, causing death by suffocation

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