A kind of self-returning explosion-proof door for vertical air shaft in mining area

Abstract

The invention belongs to the technical field of explosion-proof doors, and specifically relates to a self-recovering explosion-proof door for vertical air shafts in mining areas, including a base, an explosion-proof barrel, a mounting plate, a limit plate, an anti-collision block, a sliding cylinder, an impact-resistant plate, Rotating cylinder, support shaft, No. 1 spring and counterweight; in the present invention, the shock wave generated by the explosion is used to cooperate with the large-pitch spiral groove to realize the automatic rotation of the rotating cylinder, and then automatically realize the alignment of the No. 1 through hole and the No. 2 through hole, and then Realize the automatic and rapid dissipation of the shock wave after the explosion; and the shock wave generated in the shaft needs to overcome the elasticity of the No. 1 spring and the gravity of the counterweight during the process, so as to weaken the shock wave generated by the explosion to a certain extent, and will not damage the surrounding area. The environment produces a large shock; at the same time, the rebound force of the No. 1 spring and the self-gravity of the counterweight are used to stagger the No. 2 through hole and the No. 1 through hole, thereby realizing the automatic sealing of the explosion-proof door, thereby reducing the poisonous gas in the well. Diffusion of dust.

Description

technical field [0001] The invention belongs to the technical field of explosion-proof doors, in particular to a self-returning explosion-proof door for vertical air shafts in mining areas. Background technique [0002] The explosion-proof door is a special sealed manhole cover installed on the exhaust wellhead of the main ventilator in the coal mine. Its functions mainly include the following aspects: (1) During normal ventilation, it is necessary to maintain airtightness to isolate the underground airflow from the ground atmosphere to prevent The wind flow is short-circuited to ensure that the ventilation system is normal. (2) When a gas or coal dust explosion accident occurs underground, the explosion-proof door is opened by the blast airflow shock wave, and the explosive airflow is directly discharged to the ground atmosphere, reducing the pressure of the airflow in the mine, playing the role of pressure relief, and preventing the main ventilator from being damaged. Dam...

AI Technical Summary

Problems solved by technology

The present invention is mainly used to solve the problem that the existing mine explosion-proof doors need to be manually closed when they are in use, so that the timeliness of closing the explosion-proof doors cannot be accurately controlled, and there is a risk that toxic gas and smoke in the mine will escape; and The impact resistance of the existing explosion-proof doors and the ability to absorb the impact of the explosion are relatively weak, which leads to the explosion-proof door being violently opened at the moment of explosion, which causes a great shock to the environment around the explosion-proof door

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