Fault prevention and control device for local ventilation system on driving face of coal mine

Abstract

The invention discloses a fault prevention and control device for a local ventilation system on a driving face of a coal mine. The fault prevention and control device comprises a prevention and control pipeline, wherein a fan air outlet and an air cylinder air inlet are arranged on the two end surfaces of the prevention and control pipeline, an all-negative pressure air flow port is arranged on the side wall of the prevention and control pipeline, a rotating shaft is movably arranged in the prevention and control pipeline through a shaft sleeve, a two-way air guide plate is connected on the rotating shaft, the two-way air guide plate is respectively larger than the fan air outlet and the all-negative pressure air flow port, when the two-way air guide plate is vertical, the fan air outlet can be closed, and when the two-way air guide plate is horizontal, the all-negative pressure air flow port can be closed. When power failure of a ventilator occurs or a fault occurs, all-negative pressure air flow of an extraction type ventilation mine can be utilized for continuously supplying air to the driving face so as to ensure the continuity of ventilation of the driving face of the mine and prevent the occurrence of local gas accumulation on the driving face; and when coal and gas burst or other catastrophes and air flow reversion occur on the driving face, the air flow with reversion at a catastrophe place can be prevented from carrying high-concentration gas to enter the local ventilator.

Description

technical field [0001] The invention belongs to the technical field of coal mining equipment, in particular to a fault prevention and control device for a local ventilation system of a coal mine driving face. Background technique [0002] The gas in the coal mine is pouring out into the mining space all the time. The main task of mine ventilation is to remove the gas in the mining space. In order to improve the reliability of the ventilation system of the excavation working face, the ventilation method of the excavation working face adopts mechanical ventilation of local fans (although the full negative pressure wind provided by the mine main The air volume is difficult to adjust according to the required air volume, so this ventilation method is generally not used); at the same time, in order to ensure that the ventilator continuously provides fresh air to the excavation face, mines often adopt measures such as dual fans and dual power supplies. However, there are still ac...

AI Technical Summary

Problems solved by technology

However, accidents such as wind flow reversal or gas accumulation at the workplace still occur in individual mines every year due to accidents at the workplace, failure of the fan system or power outages, etc.

[0003] At present, the Chinese patent No. 200420010605.0 realizes the function of automatic switching between the mine’s full wind pressure ventilation and local fans, but it cannot prevent coal and gas outbursts or other catastrophes at the excavation face and high-concentration gas passing through the local area when the wind flow reverses. Ventilator and its electrical parts (sparks generated by electrical appliances may detonate high-concentration gas, and high-intensity reverse wind flow may damage local fan equipment)

The Chinese patent No. 201120427773.X discloses an anti-headwind device, but it cannot realize the function of using the full negative pressure wind of the mine to continuously supply air to the tunneling face after the local fan is powered off or fails.

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