Check valve for air supply of sulfide hexafluoride equipment

Abstract

The invention relates to the technical field of valve bodies, in particular to a check valve for air supply of sulfide hexafluoride equipment. The check valve comprises a valve body; an air bottle side channel communicating with an air bottle is formed in one end of the valve body, an equipment side channel communicating with equipment is arranged at the other end of the valve body, and a check channel is arranged at the middle part of the valve body; the air bottle side channel communicates with the equipment side channel through the check channel; the check channel communicates with the airbottle side channel through a check valve port; a valve element and an elastic piece are arranged in the check channel; the valve element is sealed and contacted with the check valve port for stoppingair flow communication between the air bottle side channel and the check channel; one end of the elastic piece is fixed at the end, near the equipment side channel, of the check channel through a connecting piece, and the other end of the elastic piece is connected with the valve element; and through elastic thrust of the elastic piece, the valve element is pushed to be always sealed and contacted with the check valve port. The check valve for air supply of the sulfide hexafluoride equipment realizes one-way ventilation, and effectively prevents dangers caused by the air pressure change.

Description

technical field [0001] The invention relates to the technical field of valve bodies, and more specifically, to a check valve used for supplementing air of sulfur hexafluoride equipment. Background technique [0002] Whenever entering the intensive power supply period, the power supply bureau will carry out maintenance on important users, power supply sites, and substations as planned. Sulfur hexafluoride is used as the medium for most of the equipment such as switches and CTs (current transformers) above 110kV in substations. Sulfur hexafluoride inflatable equipment is affected by factors such as environment, temperature, and equipment quality, and often suffers from insufficient pressure. When the pressure is lower than the locking pressure, the switch will be electrically locked, and the opening and closing operation cannot be performed, causing serious power grid risks. Therefore, it is necessary to check the air pressure of the sulfur hexafluoride switch frequently and r...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defect in the above-mentioned prior art that the gas pressure change is easy to bring about risks when the gas is replenished by switching on and off, the present invention provides a check valve for gas replenishment of sulfur hexafluoride equipment, which realizes one-way ventilation and effectively avoids the risk caused by pressure changes. danger of changing

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