Vertical air shaft double-door type explosion-proof system

Abstract

The invention discloses a vertical air shaft double-door type explosion-proof system, which mainly consists of a gable wall body (2), door bodies (3), a buffer framework (4) and a flexible buffer wall (5), wherein the gable wall body and the buffer framework are respectively fixed on a wellhead steel reinforced concrete base (1); small holes are respectively and correspondingly formed in upper and lower cross beams arranged at the left and right sides of the buffer framework at fixed intervals; the flexible buffer wall consists of a plurality of string-shaped buffer units; the string-shaped buffer units are correspondingly fixed in the small holes formed in the upper and lower cross beams arranged at the left and right sides of the buffer framework; the door bodies (3) are respectively arranged on a short upright post of the buffer framework (4) through a door shaft hinge (6); and the two ends of the door bodies (3) are supported on the gable wall body. The vertical air shaft double-door type explosion-proof system has the advantages that the fast explosion release and automatic resetting can be realized; higher explosion-proof performance is realized; and the vertical air shaft double-door type explosion-proof system is applicable to new and old air shaft building.

Description

technical field [0001] The invention relates to an explosion-proof door of a vertical air shaft in a coal mine that can be quickly opened and reset, which is a protection device for protecting a main ventilator in a mine from being damaged by an explosion shock wave, and belongs to the technical field of mine ventilation safety. Background technique [0002] According to the requirements of my country's safety regulations, in the coal mine ventilation system, explosion-proof doors should be installed at the return air wellhead. The function of the explosion-proof door is to use the straight-line propagation characteristics of the shock wave to quickly release the shock airflow generated by the underground explosion, thereby protecting the main ventilator of the mine from being damaged. [0003] At present, a kind of canopy-type explosion-proof door is generally used in vertical wind shafts of coal mines in my country, which is composed of a door body, a sealed oil tank, a pu...

AI Technical Summary

Problems solved by technology

This kind of explosion-proof door has been proved by many accidents to have the following serious defects: ①After the explosion-proof door is opened, the force is often unbalanced during the process of rising and falling, and the door body is prone to offset and deflection, and it is difficult to reset itself after falling, resulting in a large number of Air leakage, or even short-circuit of air flow; ②The explosion-proof door has no buffer and limit device, and its anti-explosion ability is low. When the explosion power is strong, the explosion-proof door is blown away from the wellhead

After the explosion-proof door is blown to the ground, even if the appearance is intact, it is difficult to cover it again by manpower without the lack of hoisting machinery. As a result, the main underground ventilation system cannot be restored for a long time, and the opportunity for emergency rescue is missed, causing the accident to magnify.

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