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Low-voltage vacuum circuit breaker and vacuum arc-extinguishing chamber for circuit breaker

A vacuum circuit breaker and arc extinguishing chamber technology, which is applied to high-voltage air circuit breakers, circuit breaker components, circuits, etc., can solve problems such as bellows strain, affecting the vacuum degree of the arc extinguishing chamber, and poor sealing of the arc extinguishing chamber, achieving The effect of ensuring safe operation

Active Publication Date: 2016-11-16
容县计量和产品质量检测中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The arc extinguishing chamber of the existing vacuum circuit breaker is generally slidingly connected with a moving conductive rod at the lower end. The static contact at the lower end of the static conductive rod on the upper part of the arc chamber is closed or separated, so as to realize the closing and opening of the circuit breaker; in order to ensure the vacuum degree in the arc extinguishing chamber, there is also a connection between the moving conductive rod and the lower end of the arc extinguishing chamber Metal bellows, the bellows shrink when the movable conductive rod is opened downward, and the bellows stretch when the movable conductive rod is upwardly closed. , which directly affects the arc extinguishing effect
The Chinese patent No. 2009101323216 discloses a large-capacity vacuum circuit breaker, which improves the shut-off capability of the circuit breaker by applying a longitudinal magnetic field between the energized conductors, but the arc extinguishing chamber still uses a bellows to achieve sealing. It does not solve the sealing problem of the arc extinguishing chamber well, and the arc extinguishing chamber is prone to faults caused by poor sealing after a large number of opening and closing times of the vacuum circuit breaker

Method used

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  • Low-voltage vacuum circuit breaker and vacuum arc-extinguishing chamber for circuit breaker
  • Low-voltage vacuum circuit breaker and vacuum arc-extinguishing chamber for circuit breaker
  • Low-voltage vacuum circuit breaker and vacuum arc-extinguishing chamber for circuit breaker

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Effect test

Embodiment 1

[0044] according to Figure 1 to Figure 13 As shown, this embodiment is a low-voltage vacuum circuit breaker, including a base 1, a housing 2 fixedly installed above the front of the base, and three arc extinguishing chambers 5 fixedly connected above the rear of the base; the arc extinguishing chamber The upper end of the arc extinguishing chamber is connected with an incoming line seat 32, and the lower end of the arc extinguishing chamber is connected with an outgoing line seat 31. The end of the incoming line seat and the outgoing line seat facing the shell is connected with an insulator 6, and the other end of the insulator is fixedly connected with the shell 2 rear end.

[0045] Copper rods 33 are respectively connected to the ends of the incoming line seat and the outgoing line seat toward the rear of the circuit breaker, and plum blossom contacts 34 are connected to the rear ends of the copper rods;

[0046] The arc extinguishing chamber includes a porcelain shell 52, ...

Embodiment 2

[0072] Compared with Embodiment 1, this embodiment also proposes the following improvements: a corrugated conductive tube is connected between the second contact part of the lower contact assembly and the lower end of the lower conductive rod, and the bending position of the corrugated conductive tube is equidistant Molded with openings for increased deformability.

[0073] Since the lower contact assembly in Embodiment 1 is slidably connected to the lower conductive rod, electric sparks may appear between the first contact part, the second contact part and the lower conductive rod due to friction, so that contact surface will appear Damage, not conducive to multiple opening and closing. The corrugated conductive tube acts as a shunt on the premise of no obvious resistance, so that no arc occurs between the first contact part, the second contact part and the lower conductive rod, so as to ensure the service life of the arc extinguishing chamber.

Embodiment 3

[0075] combine Figure 14 As shown, the difference between this embodiment and Embodiment 1 or 2 is that the insulator 6 mentioned above is canceled, and a cover 8 is arranged outside the arc extinguishing chamber, the incoming line seat and the outgoing line seat, and the lower end of the case is fixedly connected to On the base, the wire inlet seat and the wire outlet seat are fixedly connected in the casing, and a cover tube 81 covering the copper rods is formed on the casing corresponding to the position of each copper rod.

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Abstract

The invention discloses a low-voltage vacuum circuit breaker and a vacuum arc-extinguishing chamber for the circuit breaker. The circuit breaker comprises a base, and three arc-extinguishing chambers which are fixedly connected above the rear part of the base, wherein a wire inlet seat is connected with the upper end of each arc-extinguishing chamber while a wire outlet seat is connected with the lower end of each arc-extinguishing chamber; one ends, which face to the shell, of the wire inlet seats and the wire outlet seats are connected with insulators, and the other ends of the insulators are fixedly connected with the back end of the shell; each arc-extinguishing chamber comprises a ceramic shell; each ceramic shell comprises an arc-extinguishing chamber shell, an operating shell, and connecting pipes which are connected with the corresponding arc-extinguishing chamber shell and the corresponding operating shell; the upper end of each arc-extinguishing chamber shell is connected with an upper cover body, and the lower end of each arc-extinguishing chamber shell is connected with a lower cover body; the upper cover body is connected with an upper conductive rod, and the lower cover body is connected with a lower conductive rod; the lower end of the upper conductive rod is fixedly connected with an upper contact; a lower contact assembly slidably sleeves the lower conductive rod; and a movable iron core which is used for driving the lower contact assembly is mounted in the operating shell. The arc-extinguishing chamber for the circuit breaker has excellent sealing performance and a long service life.

Description

technical field [0001] The invention belongs to the field of electric equipment, and in particular relates to a structure of a vacuum circuit breaker. Background technique [0002] The arc extinguishing chamber of the existing vacuum circuit breaker is generally slidingly connected with a moving conductive rod at the lower end. The static contact at the lower end of the static conductive rod on the upper part of the arc chamber is closed or separated, so as to realize the closing and opening of the circuit breaker; in order to ensure the vacuum degree in the arc extinguishing chamber, there is also a connection between the moving conductive rod and the lower end of the arc extinguishing chamber Metal bellows, the bellows shrink when the movable conductive rod is opened downward, and the bellows stretch when the movable conductive rod is upwardly closed. , which directly affects the arc extinguishing effect. The Chinese patent No. 2009101323216 discloses a large-capacity va...

Claims

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Application Information

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IPC IPC(8): H01H73/18H01H33/664
CPCH01H33/664H01H73/18
Inventor 周骆平
Owner 容县计量和产品质量检测中心