Controllable pressure release device for gas-sealed high-voltage electrical equipment

Abstract

The invention provides a controllable pressure release device for gas-sealed high-voltage electrical equipment. The controllable pressure release device comprises a main body part, a piston and an endcover; one end of the main body part is provided with an air inlet hole, the other end of the main body part is fixedly connected with the end cover, an exhaust hole is formed in the side wall of themain body part, the piston is arranged in the main body part, the outer wall of the piston is tightly matched with the inner wall of the main body part, the piston can move in an inner cavity of themain body part, and the piston divides the inner cavity of the main body part into an exhaust chamber and a control chamber; the air inlet hole communicates with the exhaust chamber, and the exhaust hole communicates with the exhaust chamber; and an inflation valve and a pressure meter are arranged on the end cover, and the inflation valve and the pressure meter communicates with the control chamber. The controllable pressure release device is used for grading pressure release of the high-voltage electrical equipment and can control the pressure release speed and control the high-voltage electrical box body to be maintained at a required pressure value.

Description

technical field [0001] The present application relates to the technical field of pressure relief devices, in particular to a controllable pressure relief device for gas-tight high-voltage electrical equipment. Background technique [0002] Aiming at the problem that the insulation performance of the switchgear is further reduced due to the frequent failure of the high-altitude switchgear, which exposes it to external moisture and condensation, etc., a nitrogen inflatable cabinet is usually used to solve the problem of the decline in the insulation performance of the above-mentioned switchgear. However, the electrical equipment in the inflatable cabinet may generate high temperature and high pressure gas due to short circuit and other reasons during operation, which will cause the pressure inside the box to rise. When the pressure inside the box increases, if the pressure cannot be removed in time, the inside of the box will Electrical equipment will be deformed due to excess...

AI Technical Summary

Problems solved by technology

[0004] However, the pressure relief effect of the above-mentioned pressure relief device is relatively poor, and it can only produce better pressure relief for the instantaneous pressure rise inside the box body, and the pressure relief effect for the slow pressure rise inside the box body is poor; , the plastic bolts need to be replaced again, which is very inconvenient to operate and increases the cost of use; once the gas is released, it needs to be replenished again, resulting in an increase in cost; and the function is single, it can only release the air pressure in the box to Specific air pressure value, unable to maintain the air pressure in the box at different continuous pressure values

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