Pressure relief protection mechanism and switch cabinet

Abstract

The invention discloses a pressure relief protection mechanism and a switch cabinet. The pressure relief protection mechanism comprises a group of first pressure relief protection devices and two groups of second pressure relief protection devices which are arranged on a top plate of a switch cabinet. According to the invention, when the pressure in the switch cabinet is not very high, only the first pressure relief protection device plays a role in pressure relief, the movable plate is pushed outwards by internal high air pressure, and gas is released from the first pressure relief opening; when the position detection device detects that the movable plate is pushed to the middle position or the outer end of the first pressure relief opening, the locking plate of the locking mechanism rotates, the pressure relief plate can be jacked open at any time, and the first pressure relief protection device and the second pressure relief protection device play a role in pressure relief protection at the same time; and when the position detection device detects that the movable plate returns to the inner half side of the first pressure relief opening, the locking plate of the locking mechanism rotates, and the pressure relief plate is locked.

Description

technical field [0001] The invention relates to the technical field of switch cabinets, in particular to a pressure relief protection mechanism and a switch cabinet. Background technique [0002] The switchgear is a kind of electrical equipment. The components in the switchgear are mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices. The main function of the switchgear is to generate electricity and transmit electricity in the power system. In the process of power distribution and power conversion, switch, control and protect electrical equipment. During the operation of the switchgear, internal fault arc accidents often occur due to insulation aging, misoperation, foreign objects, overvoltage and other reasons. The body bursts under strong pressure, and even causes a fire. The existing switchgear is provided with a pressure relief plate, which bounces off when the high temperature and hig...

AI Technical Summary

Problems solved by technology

During the operation of the switchgear, internal fault arc accidents often occur due to insulation aging, misoperation, foreign objects, overvoltage and other reasons. The body bursts under strong pressure, and even causes a fire. The existing switchgear is equipped with a pressure relief plate, which bounces off when the high-temperature and high-pressure gas is generated by a short circuit inside the switchgear, and releases the high-temperature and high-pressure gas into the switchgear to prevent switching. When the cabinet bursts, one end of the pressure relief plate is fixed with a metal screw, and the other end is fixed with a nylon screw. When the strength of the nylon bolt is too high, the pressure relief plate cannot be opened immediately, which will easily cause pressure accumulation and have a great impact on the cabinet.

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