Vacuum arc-extinguishing chamber for reducing impact of vacuum circuit breaker

Abstract

The invention discloses a vacuum arc-extinguishing chamber for reducing impact of a vacuum circuit breaker. The structure comprises a movable conducting rod, a weakened-impact arc extinguish chamber and a static conducting rod. The lower end of the movable conducting rod is arranged at the top end inside the weakened-impact arc extinguish chamber in an embedded manner. The upper end of the staticconducting rod is arranged at the bottom end inside the weakened-impact arc extinguish chamber in an embedded manner. A protection sealing ring sleeve on the inner wall impact protection mechanism isimpacted by the excessive impact force. One part of the impact force is consumed through the protection sealing ring sleeve. An inner wall flattening rod is driven by the impact force to be attached to the inner wall of the arc extinguish chamber to rotate. Therefore, the inner wall of the arc extinguish chamber is flattened, and the shell deformation of the arc extinguish chamber is avoided. Theservice life of the arc extinguish chamber is prolonged. Meanwhile, one part of impact force is conducted to the top end. At the moment, the part of the impact force is diffused through an impact diffusion plate at the bottom end of a corrugated pipe. The corrugated pipe is attached through a corrugated pipe impact protection mechanism. Therefore, the protection effect is achieved. It is guaranteed that the corrugated pipe cannot generate torsion. The air leakage failure of the arc extinguishing chamber is avoided.

Description

technical field [0001] The invention relates to the field of vacuum circuit breaker equipment, in particular to a vacuum interrupter for reducing impact. Background technique [0002] Vacuum circuit breakers are widely used in distribution networks. The vacuum interrupter is the heart of the vacuum circuit breaker. The diameter of the vacuum interrupter is small, the vacuum degree is above 1.33×10-3PA, the insulation strength is high, and the arc is easy to extinguish. Its arc extinguishing ability is strong, but the current vacuum interrupter has the following disadvantages: [0003] When the internal contact bounces for too long, the impact force when the internal switch is closed is too large, and the excess energy can only be consumed on the inner wall of the arc extinguishing chamber and the bellows, with tiny deformation and vibration as the main force. At the cost, the shell of the arc extinguishing chamber is deformed for a long time, which reduces the service life ...

AI Technical Summary

Problems solved by technology

[0003] When the internal contact bounces for too long, the impact force when the internal switch is closed is too large, and the excess energy can only be consumed on the inner wall of the arc extinguishing chamber and the bellows. At the cost, the shell of the arc extinguishing chamber is deformed for a long time, which reduces the service life of the arc extinguishing chamber; and the bellows is impacted, causing the bellows to generate torque, and the bellows are prone to damage, resulting in air leakage failure of the arc extinguishing chamber

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