Explosion venting door for safety protection of coal mine fire zone

Abstract

The invention discloses an explosion venting door for safety protection of a coal mine fire zone. The explosion venting door comprises a door frame and a door leaf arranged in the door frame, whereinthe left side of the door leaf and the door frame are connected through more than one hinge; more than one group of explosion venting holes are formed in the outer surface of the door leaf, wherein each group of explosion venting holes is composed of more than one through hole; the through holes in each group of explosion venting holes are of rectangular structure and uniformly arranged; the frontof each group of explosion venting holes is provided with explosion venting small doors covering the through holes; the left openings of the through holes are arranged in cylindrical structures; andthe positions, right facing the thorough holes, of the explosion venting small doors all protrude outwards to form sealing parts of conical structures, and one ends of the sealing parts are inserted into the through holes. According to the explosion venting door for safety protection of the coal mine fire zone, the situation that a worker is directly hit by a shock wave sprayed from the front sidecan be avoided, and ore carried in the shock wave is prevented from flying out to strike the worker in the front; and meanwhile, a protection structure is arranged on the door frame and the door leafso that the door frame and the door leaf can be avoided being flashed away, and accordingly high safety can be achieved.

Description

technical field [0001] The invention relates to the technical field of explosion venting doors, in particular to an explosion venting door for safety protection in coal mine fire areas. Background technique [0002] When an underground coal mine fire accident occurs, if the fire cannot be extinguished directly, the fire area is closed, and gas explosion accidents often occur during the closed process. The existing sealing technology is mainly to build airtight walls. If the sealing time is too long, it is very easy to cause gas explosion accidents. The risk of masonry airtight work is high. The strength is low, and it does not have the function of blocking the explosion shock wave and flame wave. Once a gas explosion accident occurs, it is easily damaged by the explosion shock wave, and after damage and damage, it needs to be manually rebuilt and sealed, and secondary explosions often occur, or even continuous explosions , easily causing a large number of casualties. [00...

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Problems solved by technology

[0004] But after the explosion-venting window in the above-mentioned patent is opened, it directly faces the mine. Once there are workers running in front of the door leaf at this time, the shock wave ejected from the front will directly hit the workers, causing injuries to the workers. The opening of the explosion window is very large, so that the ore carried in the shock wave can also pass through the explosion venting window. The ore flying out is easy to directly hit the workers in front, which is likely to cause the death of the workers and affect the safety.

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