Switch cabinet pressure relief device

Abstract

The present invention discloses a switch cabinet pressure relief device. The device comprises a switch cabinet body; the switch cabinet body is provided with a pressure relief port and a pressure relief channel connected with the pressure relief port; the pressure relief channel is composed of A, B and C portions; the A portion and C portion of the pressure relief channel are respectively a vehicle portion and a horizontal portion, and the B portion of the pressure relief channel is tangent to the connection of the A portion and C portion of the pressure relief channel; and the horizontal C portion of the pressure relief channel is internally provided with a movable baffle plate, a sliding pair is arranged between the movable baffle plate and the inner wall of the C portion of the pressure relief channel, the middle portion of the movable baffle plate is connected with the inner wall of the B portion of the pressure relief channel through a chain, and the length of the chain satisfies the requirement that the movable baffle plate can move out of the pressure relief channel. The switch cabinet body has arcing faults, the movable baffle plate in the pressure relief channel can rapidly move outwards under the action of the high pressure gas to rapidly and safety relieve the high pressure gas in the switch cabinet body. The switch cabinet pressure relief device can rapidly relieve the high pressure gas to a safe area so as to reduce the pressure of the cabinet door, and is simple to operate.

Description

technical field [0001] The patent of the present invention relates to a switch cabinet, in particular to a switch cabinet pressure relief device. Background technique [0002] Switch cabinets are widely used in power systems. In actual operation, internal fault arc accidents occur frequently due to insulation aging, misoperation, foreign objects and overvoltage. Arc combustion releases huge energy in a short time, causing gas inside the cabinet. Expansion and sudden increase in pressure can cause the cabinet to burst under strong pressure, and even cause a fire. At present, the most commonly used pressure relief method is to install a pressure relief cover plate on each compartment of the switchgear, one end is fixed with a metal screw, and the other end is fixed with a nylon screw. When a fault arc occurs, the nylon screw is disconnected to release the pressure in time, and the metal screw So that the pressure relief cover will not fly up and hurt people. However, the cur...

AI Technical Summary

Problems solved by technology

However, the current pressure relief method has the following problems: First, when the strength of the nylon bolts 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; second, the high-temperature and high-pressure gas is directly released into the cabinet. Outside the body, posing a threat to the safety of surrounding equipment and personnel

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