Pressure relief type automatic reset wind shaft explosion-proof cover

Abstract

A pressure releasing automatic reset air shaft anti-explosion cover relates to the field of ventilating safety of a coal mine and comprises a well lid arranged on a well mouth; at least two guide sleeves are connected to the outer peripheral edge of the well lid; a guide pillar is arranged in each guide sleeve in a penetrating mode; an elastic limiting block is arranged at the top end of each guide pillar; an upright pillar and a pressure releasing device are connected to the middle above the well lid; each pressure releasing device is respectively connected with a locking mechanism and comprises a pressure releasing drum; a cover door is hinged above each pressure releasing drum; an air spring is hinged into each pressure releasing drum; the telescopic end of each air spring is hinged to the inside of the corresponding cover door; the air springs are hinged onto the upright pillar; the telescopic end of each air spring is respectively hinged to the outside of the corresponding cover door; at least two hydraulic lifting machines are connected below the well lid; travel switches are connected onto the upright pillar; when being opened, each cover door makes contact with the corresponding travel switch and the hydraulic lifting machines are started to work. The pressure releasing automatic reset air shaft anti-explosion cover is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of coal mine ventilation safety, in particular to the structure of an explosion-proof cover. Background technique [0002] At present, gas explosion, as the number one killer of coal mine safety, has caused huge loss of personnel and property to the country and society. After the gas explosion, due to the severe deformation of the mine explosion-proof cover or the high-pressure throw, the underground air flow and the ground air short-circuit, and the toxic gases such as CO cannot be effectively discharged, causing a large number of casualties. In addition, due to the needs of underground rescue, it is often necessary to reverse the wind in the mine, and at this time, because the explosion-proof cover is often not closed in time, it will cause a short circuit of the air flow, thereby affecting the underground rescue work. Therefore, after a gas explosion occurs, it is very important how to maximize the safet...

AI Technical Summary

Problems solved by technology

Most of the existing mine explosion-proof covers are fixed. If a gas explosion occurs, the explosion-proof cover will be damaged, which will affect the underground rescue work.

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