Arc extinguish chamber structure of disconnector

Abstract

The invention discloses an arc extinguish chamber structure of a disconnector. The arc extinguish chamber structure of the disconnector comprises a pair of arc insulation walls (1) arranged oppositely, a plurality of arc extinguish grid pieces (2) which are arranged between the arc insulation walls (1) and are parallel with one another at intervals, and an insulating grid plate (3) located above the arc extinguish grid pieces (2), wherein a plurality of extending non-through air exhaust gaps (4) are formed on the insulating grid plate (3), the air exhaust gaps (4) and the multiple extinguish grid pieces (2) which are parallel with one another at intervals are intersected to form a plurality of air exhaust holes used for discharging arc free steam, the non-through air exhaust gaps and the air exhaust holes formed by the air exhaust gaps and the arc extinguish grid pieces are favorable for discharging of the arc free steam, can block a returning path of metallics in the arc free steam and prevents the metallics from returning to the arc extinguish chamber again after the metallics are discharged from the arc extinguish chamber, and therefore the density of metal steam in the arc extinguish chamber is effectively lowered, and dielectric strength is improved.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a circuit breaker arc extinguishing chamber structure for a circuit breaker. Background technique [0002] When the moving and static contacts of the circuit breaker are under load or broken by a large current due to a fault, the voltage between the moving and static contacts will cause the air medium to discharge and form an arc. In order to ensure the reliable operation of the circuit breaker, usually in the circuit breaker There are arc extinguishing chambers to extinguish the arc. However, since the arc gas contains metal particles, such metal particles tend to short circuit conductive parts or electrical devices around the circuit breaker. Therefore, in order to cool and deionize the arc extinguishing gas, the usual measure is to install an ionization elimination device at the outlet of the arc extinguishing chamber. [0003] Chinese patent document CN202258893U d...

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is the technical problem that the metal particles in the arc free steam are easy to return to the arc extinguishing chamber during the arc extinguishing process of the existing circuit breaker's arc extinguishing chamber, so as to provide a method that can effectively block the metal particles in the arc free steam. Particle return path, and circuit breaker arc extinguishing chamber structure with good arc extinguishing effect

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