A high-voltage vacuum switch tube

By combining a metal outer tube with a ceramic inner tube in the vacuum switch tube and utilizing an elastic metal sheet to conduct heat, the problem of balancing insulation and heat dissipation is solved, achieving a synergy between high withstand voltage and efficient heat dissipation, and improving the reliability of the switch tube.

CN224437501UActive Publication Date: 2026-06-30ZHEJIANG RUIGUANG VACUUM ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG RUIGUANG VACUUM ELECTRIC CO LTD
Filing Date
2025-08-06
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing vacuum switching transistors cannot simultaneously achieve good insulation and heat dissipation, resulting in poor synergy between high voltage withstand and efficient heat dissipation, and thus failing to achieve the synergy between high voltage withstand and efficient heat dissipation.

Method used

A metal outer tube is fitted onto the outside of the ceramic inner tube, and a vacuum environment is formed by the elastic metal sheet abutting against the outer wall of the ceramic inner tube. The elastic metal sheet is tilted to increase the contact area, and the elastic metal sheet conducts heat to the heat-conducting ring block and dissipates it through the metal outer tube, thus achieving continuous heat dissipation.

Benefits of technology

This improves the voltage withstand level of the switching transistor, blocks the discharge path under high voltage, avoids heat accumulation, ensures stable operation of the switching transistor within a suitable temperature range, and enhances the reliability of the switching transistor.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224437501U_ABST
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Abstract

This utility model discloses a high-voltage-resistant vacuum switch tube, comprising a metal outer tube, a ceramic inner tube, and a ring. The outer wall of the ceramic inner tube is fitted with the metal outer tube, and the two ends of the ceramic inner tube are fitted with rings. The switch tube body is disposed inside the ceramic inner tube, and the two ends of the switch tube body extend to the outside of the rings and are fixedly connected to contacts. The lower surface of the ring has a protrusion that extends into the metal outer tube. Heat-conducting ring blocks are fixedly connected at equal intervals to the inner wall of the metal outer tube. The vacuum environment between the metal outer tube and the ceramic inner tube improves the overall voltage resistance level and effectively blocks the discharge path under high voltage. At the same time, the elastic metal sheet is inclined to increase the contact area with the ceramic inner tube. During operation, the elastic metal sheet can continuously remove the heat generated by the resistance and arc of the switch tube body, avoiding heat accumulation and temperature exceeding the limit, ensuring that the switch tube body operates stably within a suitable temperature range, and improving the overall reliability of the switch tube.
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