Vacuum arc-extinguishing chamber of novel double-acting mechanism

Abstract

The invention discloses a novel vacuum interrupter with a double-action mechanism, which mainly includes two parts: an electromagnetic operating mechanism and an interrupter. The electromagnetic operating mechanism is composed of an armature, a static iron core, a coil, and a switch spring. It is composed of contacts, conductive rods and shielding covers. It is characterized in that the electromagnetic operating mechanism is placed in the arc extinguishing chamber and exists together with the arc extinguishing chamber in the vacuum shell, which solves the problem of dynamic sealing and reduces the overall volume of the vacuum circuit breaker. The invention saves the bellows and greatly improves the service life of the interrupter; in order to increase the breaking speed, on the one hand, a symmetrical double-action structure is adopted, and the two contacts move in opposite directions at the same time; on the other hand, the structure is simplified, and the movement The part is only composed of contacts, conductive rods and armatures, and the equivalent mass of the action part is very small, which greatly improves the breaking speed and breaking capacity , Reduced opening and closing arcs.

Description

technical field [0001] The invention relates to a vacuum interrupter, in particular to a novel vacuum interrupter structure with a double-action mechanism, and belongs to the technical field of high-voltage electrical appliances. Background technique [0002] Vacuum circuit breakers are widely used in power system line protection and switching, and maintain a dominant position in the medium voltage field. Its main function is to connect and disconnect the circuit by the opening and closing action of the contact. The shorter the time, the less impact damage to the equipment. The opening and closing are realized through the operating mechanism, so the performance and quality of the operating mechanism play an extremely important role in the working performance and reliability of the vacuum circuit breaker. [0003] According to the fault statistics of power operation and substations in my country, the most prominent problems of vacuum circuit breakers are mechanical and insu...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the prior art, aiming at the defects of complex structure and low breaking speed of the existing vacuum circuit breaker operating mechanism, to provide a new type of double vacuum circuit breaker with small volume, simple mechanical transmission and high initial breaking speed. Vacuum interrupter of moving mechanism

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