Mechanical replacement type mine explosion door

Abstract

The invention discloses a mechanical replacement type mine explosion door. The mechanical replacement type mine explosion door comprises an explosion venting opening and a cover plate explosion door at the top of the explosion venting opening. The cover plate explosion door and the explosion venting opening incline. A groove gear is connected to the right side of the cover plate explosion door ina clamped manner. The front face of the groove gear is coaxially connected with a transmission gear. The left side of the transmission gear is engaged with a gear set. The left side of the gear set isengaged with a first gear. The left side of the first gear is engaged with a second gear. A roller is arranged on the left side of the first gear. According to the mechanical replacement type mine explosion door, the explosion venting opening is designed to become wider gradually from bottom to top, the situation that impact waves generated by exploding enter a fan opening is avoided to a certaindegree, a fan is prevented from being destroyed, and fan safety is protected; and the explosion venting opening changing from narrow to wide has a certain weakening function to impact waves, the explosion venting opening with the inclined notch-shaped top can weaken the impact waves secondarily, the impact wave power is reduced, the cover plate explosion door is protected and is prevented from being suffering from impacting deformation, and when the cover plate explosion door does not suffer from deformation caused by impacting, the cover plate explosion door can be cyclically utilized.

Description

technical field [0001] The invention belongs to the technical field of explosion-proof doors, in particular to a mechanically replaceable mine explosion-proof door. Background technique [0002] As far as the current situation is concerned, there are a large number of high-gas mines in my country, and the explosion risk coefficient of such coal mines is extremely high, so it is necessary to take protective measures. Existing coal mine ventilation safety facilities wind shaft explosion-proof door, the mine explosion-proof door is one of the most important safety components of the mine ventilation system, which means that when a gas or coal dust explosion accident occurs underground, the explosion-proof door is opened by the explosion shock wave, Therefore, the explosive air flow is directly discharged to the ground atmosphere, which acts as a pressure relief, prevents the ventilator from being damaged due to the impact of the explosive air flow, prevents short circuit of the ...

AI Technical Summary

Problems solved by technology

[0003] The coal mine air shaft explosion-proof door is a special sealed manhole cover installed on the exhaust shaft head equipped with a fan. Explosion-proof manhole covers are almost all blown away by the strong explosive airflow and fly away from the wellhead, and cannot be reset in time. The ventilation system is short-circuited and fails to deliver fresh air to the underground, and cannot discharge harmful gases. This makes rescuers lose time for rescue and rescue, and also seriously endangers the coal mine. The life safety of underground workers will eventually lead to the expansion of the disaster and the increase in the number of victims. Therefore, the research and improvement of mine explosion-proof doors and covers are of great significance to improve the reliability of the ventilation system and the disaster resistance of the system.

Existing explosion-proof doors for wind shafts in coal mines are mainly buckle-cap type explosion-proof doors, but the prior art of this type of explosion-proof doors has a common deficiency in that after the explosion-proof doors are opened, they cannot be reset in time, and the requirements for anti-wind are not considered. , it is very easy to have a short circuit of the return air, which destroys the air flow system of the mine, and cannot pump out the poisonous gas underground and deliver fresh oxygen, causing underground workers to suffocate or die of poisoning, and also increases certain difficulties for underground rescue.

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