A tank type circuit breaker and its movable end gas retaining device

Abstract

The invention discloses a tank-type breaker and a moving-end air retaining device thereof. The moving-end air retaining device of the tank-type breaker comprises a moving-end insulated supporter, wherein a moving-end contact base is arranged on the moving-end insulated supporter; an inner air retaining hood is arranged in an inner cavity of the moving-end contact base; an exhaust hole is formed in the moving-end contact base; an outer air retaining hood is arranged on the moving-end insulated supporter, and is located at the periphery of the moving-end contact base; and the outer air retaining hood comprises the inner cavity which is communicated with the exhaust hole and of which an opening is opposite to the moving-end insulated supporter. The outer air retaining hood is added on the basis of an existing inner air retaining hood; one part of hot airflow generated by breaking the breaker is sprayed through the exhaust hole of the moving-end contact base after the outer air retaining hood is added; the part of hot airflow is sprayed to the wall of the inner cavity of the outer air retaining hood, but not directly sprayed to the inner wall of a tank body; and through the arrangement of the outer air retaining hood, a flow-guide channel is added, so that cooling of the hot airflow is quickened; and a breaking failure is avoided.

Description

technical field [0001] The invention relates to the technical field of tank type circuit breakers, in particular to a tank type circuit breaker and a moving end gas blocking device thereof. Background technique [0002] As a kind of high voltage circuit breaker, tank circuit breaker is widely used in power system. At present, most of the moving ends of tank circuit breakers do not have any additional gas-blocking equipment. The hot air flow generated during the breaking process is sprayed onto the insulating rod and the insulating support of the moving end through the opening at the bottom of the moving support, aging the insulating parts and reducing the circuit breaker. insulation properties. [0003] In order to solve the above problems, the Chinese patent CN 201820687U (authorized announcement date is 2011.05.04) discloses a self-energy circuit breaker moving end exhaust gas blocking structure, the gas blocking structure includes an insulating support and a moving end c...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a gas blocking device at the moving end of a tank type circuit breaker to solve the problem that the existing gas blocking device at the moving end of the circuit breaker has an unsatisfactory blocking effect and some hot gas will pass through the vent hole of the contact seat of the moving end. Technical problems of spraying on the inner wall of the tank

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