Along-surface flashover vacuum trigger switch with gear-shaped trigger electrode structure

Abstract

The invention belongs to the technical field of pulse power switches, and provides an along-surface flashover vacuum trigger switch with a gear-shaped trigger electrode structure. The trigger switch comprises a ceramic insulating shell, a shielding case, an anode electrode, a cathode electrode, a gear-shaped along-surface flashover material and an annular embedded trigger electrode. The external annular embedded trigger electrode can effectively prevent the trigger electrode from being ablated by a main gap arc, is used in cooperation with the gear-shaped along-surface flashover material, caninhibit contraction of an along-surface flashover channel through a magnetic field generated by axial current, and achieves the purpose of prolonging the service life of the switch. The external gear-shaped embedded trigger electrode structure adopted by the invention can effectively solve the problems that the existing along-surface flashover vacuum switch is short in service life and not resistant to ablation.

Description

technical field [0001] The invention belongs to the technical field of large-capacity, high-performance and long-life pulse power switches, and in particular relates to a surface breakdown vacuum trigger switch with a new structure. Background technique [0002] Vacuum trigger switch, also known as vacuum trigger gap, is a controllable fast closing switch, which uses vacuum as the insulation and arc extinguishing medium between cathode and anode, and uses different trigger methods to control the conduction of the main gap of the switch. Compared with the traditional gas trigger switch, the vacuum trigger switch has a high charge load and a long switch life. At the same time, the vacuum trigger switch also has the advantages of wide operating voltage range, fast recovery of dielectric strength, and high trigger accuracy. Therefore, the vacuum trigger switch is used. Widely used in national defense security, power system, environmental protection and other related fields. At ...

AI Technical Summary

Problems solved by technology

The number of metal clusters deposited on the surface of the flashover material increases with the number of passes, which eventually leads to the failure of the switch

At present, the technical problems of the surface breakdown vacuum trigger switch mainly include the following points: 1) The main gap arc ablates the electrode to generate metal vapor, and the metal vapor deposits on the surface of the flashover material to affect the life of the switch; 2) The trigger electrode and the main gap arc The distance is short and easy to be ablated; 3) The flashover channel shrinkage caused by the discharge between the traditional trigger electrode structure and the cathode will cause serious ablation and carbonization on the surface of the flashover material

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