Mechanical latching mechanism of explosion-proof switching box

Abstract

The invention relates to a mechanical latching mechanism of an explosion-proof switching box. Mechanical latching mechanisms are arranged at an inner side of a left door, an inner side of a right door and an inner side of a box body between the left door and the right door. A rotating shaft, a latching limit disk, a right-door latching lever, and a right-door latching axle seat are arranged at the inner side of the right door. A latching backing plate, an intermediate axle seat, an intermediate pin, a latching board guiding axle and a latching board are arranged at the inner side of the box body. Besides, a left-door latching hammer base is arranged at the inner side of the box body; and a left-door latching hammer is rotatably installed at the left-door latching hammer base. Moreover, a left-door latching base is arranged at the inner side of the left door, wherein the position of the left-door latching base is corresponded to that of the left-door latching hammer base; and an intermediate pin hole that is corresponded to the intermediate pin is arranged on the left-door latching base. According to the invention, latching mechanisms are utilized to control breaking of an isolating switch, so that misoperation of operation personnel and maintenance personnel can be prevented and construction safety can be ensured; and therefore, possibilities of gas and dust explosion in a coal mine can be eliminated, wherein the gas and dust explosion may be caused by the misoperation.

Description

technical field [0001] The invention relates to a safety protection device for a flameproof switch box, in particular to a locking mechanism arranged on the inner side of the left door of the switch box, the inner side of the right door and the inner side of the box body between the left door and the right door. Background technique [0002] The working environment of the underground equipment in the coal mine is harsh, and the left and right doors of the switch box must be opened for maintenance when the equipment fails and the specified maintenance period is reached. The existing switch box structure can open the left and right doors when the isolating switch is electrified, which can easily cause misoperation by maintenance personnel, electric shock accidents, and even gas and coal dust explosion accidents. Most of the existing technologies use electromechanical combined locking, which has the problem of low reliability and damage. For example, the patent No.: 20072001669...

AI Technical Summary

Problems solved by technology

The existing switch box structure can open the left and right doors when the isolating switch is electrified, which can easily cause misoperation by maintenance personnel, electric shock accidents, and even gas and coal dust explosion accidents

Most of the existing technologies use electromechanical combined locking, which has the problem of low reliability and damage. For example, the patent No.: 200720016697.7 and the patent name: "Explosion-proof control box for electromechanical combined locking" discloses a mine The locking device of the explosion-proof control box used by the air compressor, but the key components of this locking device are buttons, wrenches, switches, screw screws and limit plates. The locking structure of this structure is complex to operate, easy to damage, and safe and reliable. Sex is not high

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