Vertical ventilating shaft anti-explosion door and method for relieving pressure safely and performing ventilation quickly by using door

Abstract

The invention discloses a vertical ventilating shaft anti-explosion door and a method for relieving pressure safely and performing ventilation quickly by using the door. An upper-layer umbrella-type door is overlapped on a lower-layer umbrella-type door of a conventional anti-explosion door; rupture disks are arranged on fan frames in even numbers on the umbrella surface of the upper-layer umbrella-type door; steel plates are arranged uniformly at intervals on fan frames in the same eve numbers on the umbrella surface of the lower-layer umbrella-type door; and half of the fan frames on which steel plates are not arranged form cavities. When explosion occurs underground, blast waves directly impact the rupture disks through cavities of the lower-layer door, the rupture disks crack quickly and are communicated with the atmosphere directly, so that the pressure is relieved rapidly, and the door is prevented from being deformed and damaged when impacted strongly; a ventilator is protected against impact; and after an explosion accident, the upper-layer door is rotated rapidly, the upper-layer umbrella surface which is not impacted and doesn't crack is enabled to be aligned to three cavities of the lower-layer anti-explosion door, and the anti-explosion door is sealed in time, so that mine ventilation is restored as soon as possible, and the life safety of trapped persons underground is guaranteed to the maximum extent.

Description

technical field [0001] The invention relates to ancillary facilities of shaft air shafts in coal mines, in particular to explosion-proof doors for shaft air shafts. Background technique [0002] In coal mining, a complete ventilation system is the prerequisite for safe coal mining, and the normal operation of the main ventilator ensures the supply of fresh air underground. As one of the main accessories of the ventilator, the explosion-proof door has the following main functions: (1) When the mine is normally ventilated, the explosion-proof door can maintain airtightness and avoid short-circuit of the air flow; (2) When gas occurs underground or coal dust explosion, the explosion-proof door can be instantly opened to release pressure by the impact of underground high-pressure air waves to protect the main ventilator from damage; (3) after a mine gas or coal dust explosion occurs, the explosion-proof door can be reset in time to restore The integrity of the ventilation syste...

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the technical defect of poor safety performance of the existing explosion-proof doors, the present invention proposes a new type of explosion-proof door body for vertical wind shafts in coal mines.

Images