Pneumatic closing and locking alarm device of air door

Abstract

The invention relates to the technical field of pneumatic control, in particular to a pneumatic closing and locking alarm device of an air door. The pneumatic closing and locking alarm device comprises a closing and locking part and a bell ringing part; the closing and locking part comprises a contact arm and a controlling valve core; the bell ringing part comprises a vibrating valve core, a vibrating rod and a ringing bell; the closing and locking part is connected with the bell ringing part, one end of the controlling valve core is connected with the contact arm, one end of the vibrating valve core is connected with the vibrating rod, and the other end of the vibrating rod is connected with the ringing bell; and the closing and locking part and the bell ringing part are fixed at a door frame of the air door. The pneumatic closing and locking alarm device has the advantages that the pneumatic closing and locking alarm device of the air door has the air door closing and locking function and the pneumatic bell-ringing alarming function, opening by manpower is completely not required, and electric power is not required for the whole device; and anti-explosion requirements of an underground coal mine can be met, and the pneumatic closing and locking alarm device is especially suitable for using in the high gaseous mine places and inflammable and explosive places.

Description

technical field [0001] The invention relates to the technical field of pneumatic control, in particular to a pneumatic locking alarm device for a damper. Background technique [0002] The damper is an important building in the coal mine that can not only cut off the wind flow, but also pass vehicles and pedestrians. It mainly realizes the control of the wind flow underground. The coal mine underground damper requires at least two doors. Only when one damper is closed can the other be opened, that is, the two doors cannot be opened at the same time, otherwise it will cause air leakage or short circuit, which will affect the mine ventilation system. [0003] Therefore, the damper is usually locked. In the prior art, the coal mine damper is mostly installed with electronic sensors such as proximity and travel switches at the door frame, and the electronic signal is transmitted to the control device through the opening and closing of the door to realize the state control of anot...

AI Technical Summary

Problems solved by technology

However, electrical equipment is prone to sparks and gas explosions. The use of electrical equipment must have strict explosion-proof functions before it can go down the mine, and there is a risk of explosion loss and potential safety hazards. Therefore, it is forbidden to use it in the return air tunnel of high-gas mines. It can be pushed and opened manually, with high labor intensity and low safety

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