A primary and backup coal mine wind shaft explosion-proof door system

Abstract

The invention discloses an explosion-proof door system for main and standby air shafts in coal mines, which comprises a wellhead base body, a gable body, a supporting beam, a main door body, a backup door body, a buffer frame, a counterweight system, a linkage system and an automatic door opening system. The supporting beam spans the wellhead and is fixed on the top of the two gables. The base of the wellhead is provided with a door body base. One end of the main body and the spare door body is installed on the door body base through a hinge, the main door body is covered on the gable body and the supporting beam, the other end of the spare door body is connected with the counterweight system, and the buffer frame is fixed On the base of the wellhead, the buffer frame is located at the rear end of the spare door, and a buffer block is set between the buffer frame and the spare door. One end of the counterweight system is connected to the spare door, and the other end is plugged into the linkage system. The other end of the system is connected with the main door body, and the invention can resist relatively large explosion impact and has low construction cost.

Description

technical field [0001] The invention relates to the technical field of coal mine safety, in particular to a backup type coal mine air shaft explosion-proof door system, which is used to protect the safety of the coal mine main ventilator and realize the rapid restoration of the ventilation system after a disaster. Background technique [0002] Coal mine air shaft explosion-proof door is an important explosion-venting facility to protect the mine's main ventilator. Its function principle is to use the propagation and attenuation characteristics of the shock wave to quickly release the explosion shock airflow in the air shaft, thereby reducing the explosion shock wave. Arranged on the side of the air shaft Shock of the main ventilator. [0003] At present, a bell-shaped 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 pulley frame, a counterweight, and a traction wire rope. The o...

AI Technical Summary

Problems solved by technology

However, the wind shaft explosion-proof door body is a large shell-like structure, which will obtain huge impact energy under the impact of the explosion.

In a limited space, it is very difficult to absorb and transfer the explosion energy of the explosion-proof door and keep the structure and function of the explosion-proof door basically intact.

This will inevitably force people to design large, complex and expensive functional mechanisms to meet explosion-proof requirements.

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