Arc extinguishing chamber insulation auxiliary structure

Abstract

The invention discloses an arc extinguishing chamber insulation auxiliary structure, which comprises a moving end part, a static end part, an impeller and an insulating support seat connecting the moving end part and the static end part. The two ends of the insulating support seat are respectively connected with a static contact seat and a pressure cylinder. The insulating support seat sleeves a nozzle of the moving end part, and a chamber is formed between the insulating support seat and the nozzle. A fixed plate of the static contact seat is provided with an air outlet communicated with thenozzle, and the fixed plate of the static contact seat is also provided with an air inlet communicated with the chamber and located outside the air outlet. The impeller rotationally fits the outer endface of the fixed plate, and the air outlet and the air inlet of the fixed plate correspond to the inner blade and the outer blade of the impeller respectively. The decline of the insulation performance of the insulating support seat can be avoided.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to an auxiliary insulating structure for an arc extinguishing chamber. Background technique [0002] The existing gas-insulated metal-enclosed switchgear is a more advanced technology emerging in the field of high-voltage switches in recent years. The core device of gas-insulated metal-enclosed switchgear is the circuit breaker. Most of the current circuit breakers use the compressed air principle or the self-energy principle. Arc extinguishing chamber, the early arc extinguishing chamber generally adopts the method of insulating and supporting the moving end part and the static end part respectively, but no measures are taken to prevent interphase interference between the moving end part and the static end part, which causes the circuit breaker to break During the process, due to interphase interference, the failure rate of fault interruption is relatively high, and the cost and ris...

AI Technical Summary

Problems solved by technology

[0002] The existing gas-insulated metal-enclosed switchgear is a more advanced technology emerging in the field of high-voltage switches in recent years. The core device of gas-insulated metal-enclosed switchgear is the circuit breaker. Most of the current circuit breakers use the compressed air principle or the self-energy principle. Arc extinguishing chamber, the early arc extinguishing chamber generally adopts the method of insulating and supporting the moving end part and the static end part respectively, but no measures are taken to prevent interphase interference between the moving end part and the static end part, which causes the circuit breaker to break During the process, due to interphase interference, the failure rate of fault interruption is relatively high, and the cost and risk of equipment testing and subsequent operation are high; in order to solve this problem, the current arc extinguishing chamber connects the moving end part and the static end part through an insulating support seat Generally speaking, phase-to-phase interference can be avoided through the insulating support seat; however, the current interrupter still has defects. When a high voltage is instantaneously generated between the moving end part and the static end part due to the oscillation of the grid voltage, this high voltage is easily Discharge on the surface of the insulating support seat causes the insulation performance of the insulating support seat to decline, making the service life of the insulating support seat not high

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