High-voltage circuit-breaker connector and high-voltage circuit breaker using same

Abstract

The invention discloses a high-voltage circuit breaker and a connector used for connecting a transmission pulling rod and an internal crankarm; one end of the connector is used for being articulated with a crankarm and the other end thereof is used for connecting with the transmission pulling rod; the connector is designed as a concave structure at least at one side facing to the rotating shaft ofthe crankarm. The connector adopts an arc-shaped structure which can shorten the length of the internal crankarm, thus reducing the operation moment during the operation process of the circuit breaker, reducing the mechanical impact of all linked mechanism parts and the arc-extinguishing chambers of the circuit breaker during the operation process of the circuit breaker and reducing noise and mechanical vibration during the operation process; furthermore, the connector and the circuit breaker relieve the mechanical fatigue and abrasion deformation of the mechanical parts, are beneficial for the working stability of the circuit breaker and improve the working reliability and service life of the circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switches, and in particular relates to a connection head on a high-voltage circuit breaker for connecting an operating mechanism and each linkage mechanism. Background technique [0002] High-voltage circuit breakers are the most important control and protection equipment in power systems. The operating mechanism is the mechanism that controls the opening and closing operation of the circuit breaker. At present, the commonly used operating mechanisms mainly include electromagnetic operating mechanisms, spring operating mechanisms, pneumatic operating mechanisms and hydraulic operating mechanisms. Various types of circuit breakers, regardless of their arc extinguishing medium and working principle, have the same basic requirements for the operating mechanism, that is, sufficient operating power and operating torque are required to ensure the opening and closing speed of the circuit breaker. ...

AI Technical Summary

Problems solved by technology

During the opening and closing operation of the high-voltage circuit breaker, in order to avoid the collision between the transmission rod and the shaft of the crank arm, it is necessary to lengthen the length of the crank arm appropriately; Limited by the shaft of the crank arm, generally it can only rotate about 60°, so it requires a large operating torque

However, when the transmission rod reaches the upper or lower apex with a large operating torque, a large impact is likely to occur between the connector and the crank arm, and the impact force is completely transmitted to the circuit breaker through the transmission rod and the crank arm shaft. Various mechanisms, so that during the operation process, the various linkage mechanism parts of the circuit breaker and the mechanical parts in the arc extinguishing chamber are subjected to a large mechanical impact, and the noise and mechanical vibration generated during the operation process are relatively large, which causes mechanical damage to the mechanical parts. Fatigue and wear and deformation are the main causes of mechanical failure of circuit breakers, which seriously affect the working stability of circuit breakers and reduce the working reliability and life of circuit breakers

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