A switching accelerating mechanism of a vacuum circuit breaker

Abstract

The invention provides an opening and closing accelerating mechanism of a vacuum circuit breaker, belonging to the technical field of high-voltage switchgear. The utility model solves the problem thatthe arc extinguishing effect of the existing vacuum circuit breaker is poor when the vacuum circuit breaker is switched on and off. A switch open and closing accelerate mechanism A vacuum circuit breaker includes a base body, driving mechanism, insulated tie rods and vacuum interrupters, A switch open and closing acceleration mechanism include a connecting shaft, connecting rod and elastic element, the two ends of the connecting shaft are respectively connected with an insulating tie rod and a driving rod, the two ends of the connecting rod are respectively articulated with a connecting shaftand an elastic unit, The elastic unit can store energy along the radial force of the connecting shaft and make the connecting rod always have thrust to one side of the connecting shaft. When the switch is opened or closed, the connecting rod can swing up and down around one end of the connecting rod and the elastic unit hinge. After the switch is closed, one end, hinged with the connecting rod ofthe connecting shaft is inclined upward, and after the switch is opened, one end, hinged with the connecting rod of the connecting shaft is inclined downward. The invention can not only improve the opening and closing speed of the arc extinguishing chamber, but also keep the stable connection between the movable contact and the static contact after the arc extinguishing chamber is closed.

Description

technical field [0001] The invention belongs to the technical field of high-voltage switchgear, and relates to a vacuum circuit breaker, in particular to an opening and closing acceleration mechanism of a vacuum circuit breaker. Background technique [0002] Vacuum circuit breaker is named for its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and no maintenance for arc extinguishing. The application is more popular. During the use of vacuum circuit breakers, arcs are likely to occur when the moving contacts and static contacts are close to each other. Therefore, the opening and closing speed of vacuum circuit breakers is getting better and better, so as to reduce the generation of arcs and reduce the damage to equipment. [0003] At present, most of the vacuum circuit breakers on the market only focus on the opening speed ...

AI Technical Summary

Problems solved by technology

Since the magnitude of the repulsive force is inversely proportional to the square of the distance between objects, the initial force on the connecting rod is large and decreases rapidly with the movement of the connecting rod. The force is unstable, and the late speed of closing and opening is low, which is not conducive to arc extinguishing

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