A Surface Breakdown Type Two Pairs of Rod Structure Triggered Vacuum Switch

Abstract

The invention discloses a triggering vacuum switch with two pairs of rod pole structures along the surface breakdown; the triggering vacuum switch adopts a three-stage structure, including an upper corrugated ceramic shell, a lower corrugated ceramic shell, and a middle metal shield, which are arranged on the metal shield The upper and lower electrodes in the cover, the trigger electrode, the upper electrode metal connecting rod, the upper electrode flange, the lower electrode metal connecting rod and the lower electrode flange; the upper electrode flange is connected with the upper corrugated ceramic shell, and the lower The electrode flange is connected to the lower corrugated ceramic shell, and then together with the metal shield to form a closed shell; the upper electrode flange is connected through the upper corrugated ceramic shell, and the lower electrode flange is connected through the lower corrugated ceramic shell. Effectively improve the creepage distance between the upper electrode flange and the lower electrode flange. The invention has high working voltage, large arc burning area, high transfer coulomb quantity in conduction process, long working life under high current, uniform electrode ablation degree, and high power frequency withstand voltage level after arc extinguishing.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical appliances, and more specifically relates to a surface-triggered vacuum switch triggered by two pairs of rod structures. Background technique [0002] The trigger vacuum switch uses vacuum as the main gap insulation medium and arc extinguishing medium between the cathode and anode, and uses a specially designed trigger electrode to control the switch to close. With the development of pulse power technology, it is required that the matching high-power switch can work under high voltage and high current, and can be triggered stably and multiple times under the condition of small trigger energy. The main electrode structure of the traditional trigger vacuum switch of the equipment is mostly a flat electrode or a multi-rod electrode structure. There are two main trigger electrode structures: surface trigger type and field breakdown type. [0003] At present, the traditional trigger va...

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Problems solved by technology

[0008] Aiming at the defects of the prior art, the purpose of the present invention is to provide a surface-triggered type two-pair rod structure trigger vacuum switch, aiming at taking into account the arc conduction rate and at the same time solving the low working voltage of the switch in the prior art. After working for many times, the metal plasma generated by the arc will be deposited on the trigger edge surface, which will reduce the life of the switch

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