An automatic two-way explosion-proof equipment for underground coal mines and its application method

Abstract

The invention relates to a coal mine underground automatic bidirectional explosion suppression device and a use method. The bidirectional explosion suppression device comprises a sleeve, a connectingtwo-way joint, a piston barrel, a high-pressure cavity assembly and a push rod. A receiving plate is fixedly arranged on the push rod. A spraying cavity filled with dry powder is formed between the high-pressure cavity assembly, the piston barrel and an outer cover on the side where the high-pressure cavity assembly and the piston barrel are located. The interior of the high-pressure cavity assembly communicates with the interior of the piston barrel. A piston is slidably connected in the piston barrel in a sealed mode, the barrel wall of the piston barrel is provided with an air injection hole capable of enabling the spraying cavity to communicate with the interior of the piston barrel, and is provided with a through hole containing a limiting ball, the piston is provided with a step located on the side, away from the two-way joint, of the limiting ball, and grooves are formed in two sides, opposite to the limiting ball, of the sleeve respectively. The requirement for the moving distance of the piston is lowered, and it is only needed to ensure that high-pressure gas in the high-pressure cavity assembly pushes the piston away from the gas spraying hole. Bidirectional trigger can be carried out, and when one side is triggered, two sides of the device can spray dry powder, so that the explosion-proof area is increased.

Description

technical field

[0001] The invention relates to the technical field of explosion-proof underground coal mines, in particular to an automatic two-way explosion-proof equipment and a use method for underground coal mines. Background technique

[0002] Gas explosions in coal mines are very harmful, so it is necessary to isolate the explosion to prevent the explosion from expanding and spreading and causing secondary explosions. In order to perform flameproofing, two types of flameproof devices have appeared, one of which can only be unidirectionally flameproof, and when the direction of explosion flame spread is uncertain, it needs to be installed in pairs in two directions, which increases the cost and workload; the other It can be two-way explosion-proof, but it has high requirements on the thrust of the high-pressure gas. The two parts of the jet holes must overlap to trigger the action of the explosion-proof device. Therefore, the reliability of its use is poor and the diff...

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