Pressure relief method of pressure relief device of switch cabinet

Abstract

The invention relates to the technical field of safety pressure relief, in particular to a pressure relief method of a pressure relief device of a switch cabinet. The safety type pressure relief device of the switch cabinet comprises a cabinet body, a backflow device and a pressure relief device arranged in the cabinet body, the cabinet body comprises a cavity, side pressure relief cavities are formed in the left side and the right side of the cavity, a bottom pressure relief cavity is formed in the position between the bottoms of the two side pressure relief cavities, and a plurality of fixed pressure relief holes are formed between the side pressure relief cavities and the cavity in a rectangular arrangement mode. A sliding groove is formed between the bottom pressure relief cavity and the side pressure relief cavity, a plurality of pressure relief grooves are formed in the side, close to the side pressure relief cavity, of the top of the bottom pressure relief cavity, a front side hole is formed in the front side of the bottom pressure relief cavity, and a rear side hole is formed in the rear side of the front side hole. Through the arranged sealing spring, the sealing plug is reset under the elastic force action of the sealing spring, so that the sealing plug can continue to work during next pressure relief, the purpose of repeated use is achieved, resource waste is reduced, and the pressure relief cost is saved.

Description

technical field [0001] The invention relates to the technical field of safety pressure relief, in particular to a safety pressure relief device for a switchgear and a pressure relief method thereof. Background technique [0002] The switchgear is a kind of electrical equipment. The external line of the switchgear first enters the main control switch in the cabinet, and then enters the sub-control switch. Each branch is set according to its needs. If a circuit short-circuit fault occurs, under the short-circuit current of tens of thousands of amperes, high-temperature and high-pressure gas will be generated instantaneously. If the high-temperature and high-pressure gas cannot be effectively released in a very short time in a narrow cabinet, it will cause the switch cabinet to burst. The cabinet is damaged, which may endanger personal safety. [0003] Generally, pressure relief pipes are installed in the switchgear for pressure relief. The bottom of the pressure relief pipe i...

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Problems solved by technology

[0002] The switchgear is a kind of electrical equipment. The external line of the switchgear first enters the main control switch in the cabinet, and then enters the sub-control switch. Each branch is set according to its needs. If a circuit short-circuit fault occurs, under the short-circuit current of tens of thousands of amperes, high-temperature and high-pressure gas will be generated instantaneously. If the high-temperature and high-pressure gas cannot be effectively released in a very short time in a narrow cabinet, it will cause the switch cabinet to burst. The cabinet is damaged, which may endanger personal safety at the same time

[0003] Generally, pressure relief pipes are installed in the switchgear for pressure relief. The bottom of the pressure relief pipe is provided with a connecting plate, which is deformed and broken by high-temperature and high-pressure gas, and then the high-temperature and high-pressure gas is discharged through the pressure relief pipe. The method cannot be reused, and the connecting plate needs to be replaced if it is deformed and broken, which is a waste of resources and increases the cost of pressure relief

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