Explosion-proof ventilation device for underground engineering

Abstract

The invention discloses an explosion-proof ventilation device for underground engineering. The explosion-proof ventilation device for the underground engineering comprises a ventilation pipe and a fanmounted inside the ventilation pipe, the inner wall of the ventilation pipe is fixedly provided with an adjustment device for adjusting the rotation speed of the fan, a treatment box is fixed on theinner wall of the ventilation pipe, the side wall of the treatment box is provided with a ventilation groove in a penetrating mode, an L-shaped connecting rod is fixed on the inner wall of the ventilation groove, a rotating shaft is rotationally connected to the side wall of the connecting rod, and a plurality of rotating plates are fixed to the circumferential side wall of the rotating shaft. Theexplosion-proof ventilation device has the advantages that when the concentration of mashgas of an underground passage is relatively high, and air input by an air outlet pipe is not enough to reducethe concentration of the mashgas, a detector can emit an acousto-optic alarm, the emitted sound can be used for prompting a worker for prevention, the emitted flash can reduce the value of resistanceof a photoresistor, so that the attraction force of an electromagnet to an electricity connecting piece is increased, then the rotation speed of the fan is reduced, the air suction amount per unit time is reduced, then the concentration of the mashgas in the ventilation pipe is reduced, and explosion is avoided.

Description

technical field [0001] The invention relates to the technical field of underground engineering, in particular to an explosion-proof ventilation device for underground engineering. Background technique [0002] Underground engineering refers to underground civil engineering that goes deep below the ground to develop and utilize underground space resources. It includes underground houses and underground structures, underground railways, highway tunnels, underwater tunnels, underground common trenches and underground passages for street crossings. [0003] During the construction of underground projects, there will be many harmful gases, which need to be discharged in time to ensure the safety of the construction environment. At present, most of them are ventilated by means of fan exhaust, but during the exhaust process, the gas is concentrated and discharged through the ventilation pipe. The concentration of harmful gases will increase significantly. For gases that may explode...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the concentration of harmful gas in the ventilation duct cannot be controlled and is easy to explode in the prior art, and proposes an explosion-proof ventilation device for underground engineering

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