Arc extinguish chamber with diversion structure and circuit breaker

By installing a flow guide tube and a baffle in the arc-extinguishing chamber, the path of the hot airflow is extended and its direction is controlled, thus solving the problem of insulation breakdown caused by foreign objects in the hot airflow and improving the insulation reliability of the arc-extinguishing chamber.

CN122117710APending Publication Date: 2026-05-29HENAN PINGGAO ELECTRIC
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Patent Information

Application Number
CN202411725319.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing arc-extinguishing chamber flow guiding structures, the hot airflow velocity is relatively high, and the metal particles and dust carried by the airflow can easily cause insulation breakdown at the tail end of the airflow channel, posing a safety hazard.

Method used

A flow guide tube and a baffle are installed inside the static support of the arc-extinguishing chamber. The flow guide tube extends the path of the hot airflow and reduces the flow velocity, while the baffle controls the airflow direction. An exhaust port is provided to prevent foreign objects from being discharged and to avoid insulation breakdown.

Benefits of technology

It effectively reduces the flow rate of hot air, reduces the discharge of foreign objects such as metal particles and dust, improves the insulation reliability of the arc-extinguishing chamber, and avoids the risk of insulation breakdown.

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Abstract

The invention relates to the technical field of switch equipment, in particular to an arc extinguish chamber with a diversion structure and a circuit breaker. The arc extinguish chamber with the flow guide structure comprises a contact seat, a static support and a flow guide cylinder, the contact seat is provided with an axial overflowing hole, the static support is of a cylindrical structure with one end open and is arranged on the contact seat in a sleeving mode through the open end, the flow guide cylinder is arranged in the static support in the axis direction, and the flow guide cylinder is arranged in the static support. An annular flow guide channel is defined by the flow guide cylinder and the static support, a through hole is formed in the outer wall of the static support, an air blocking cover is fixedly installed on the outer wall of the static support corresponding to the hole, and an exhaust hole is formed in the air blocking cover. The arc extinguish chamber with the diversion structure can prolong the discharge path of hot air flow and reduce the flow velocity, can effectively prevent a large amount of foreign matters such as metal particles and dust carried in the hot air flow from being discharged, avoids threats to the ground or interphase insulation caused by the tail part of the air flow channel, and improves the insulation reliability.
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