Arc extinguish chamber and switch device

By installing permanent magnets in the blind slots of insulating components in the arc-extinguishing chamber and installing a third grid plate on the insulating components, the magnetism and arrangement of the arc-extinguishing grid plates are enhanced, solving the problem that the arc is difficult to enter when the switching device interrupts a small current, thus achieving efficient arc extinguishing and structural stability.

CN224217389UActive Publication Date: 2026-05-08DELIXI ELECTRIC
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Patent Information

Application Number
CN202520885620.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-06
Publication Date
2026-05-08
Estimated Expiration
2035-05-06

AI Technical Summary

Technical Problem

When interrupting small currents, existing switching devices have difficulty allowing the arc to enter the arc-extinguishing chamber, resulting in low arc-extinguishing efficiency and easy burning of the moving contacts, stationary contacts, and arc-extinguishing chamber.

Method used

Permanent magnets are installed in blind slots of insulating components in the arc-extinguishing chamber, so that the inner side of the permanent magnets is basically aligned with the inner sides of the first and second bases, thereby enhancing the magnetism of the arc-extinguishing grid plates. The attraction effect is enhanced by the early approach of the permanent magnets to the arc. At the same time, grid plate slots are set on the insulating components to install the third grid plate, enriching the arrangement methods and improving the structural stability.

Benefits of technology

It improves the arc-extinguishing efficiency of the arc-extinguishing chamber when the switching device interrupts small currents, reduces the difficulty of arc entry, reduces arc damage to equipment, and improves assembly efficiency and structural stability.

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Abstract

The utility model provides an arc extinguish chamber and a switch device, and relates to the technical field of switches. The arc extinguish chamber comprises a first grid plate, a second grid plate, an insulating part and a permanent magnet. The first grid piece comprises a first base part, the second grid piece comprises a second base part, and the first base part and the second base part are arranged in a spaced mode. The insulating part is arranged between the first base part and the second base part. The insulating part is provided with a blind groove, and a groove opening of the blind groove faces the exhaust side of the arc extinguish chamber. The permanent magnets are installed in the blind grooves. The inner side of the permanent magnet, the inner side of the first base part and the inner side of the second base part are basically aligned, and the inner sides are the sides away from the exhaust side. According to the arc extinguish chamber provided by the invention, the difficulty that an arc enters the arc extinguish chamber when the switching device breaks a small current can be reduced, so that the arc extinguish efficiency of the arc extinguish chamber when the switching device breaks the small current is improved.
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