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Vacuum direct current arc extinguish chamber with permanent magnet embedded in contact

A permanent magnet and arc extinguishing chamber technology, which is used in high-voltage air circuit breakers, high-voltage/high-current switches, electrical components, etc. The effect of thermal demagnetization of the inner wall

Active Publication Date: 2021-09-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of difficult arc extinguishing and poor arc extinguishing effect existing in the existing vacuum DC interrupter

Method used

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  • Vacuum direct current arc extinguish chamber with permanent magnet embedded in contact
  • Vacuum direct current arc extinguish chamber with permanent magnet embedded in contact
  • Vacuum direct current arc extinguish chamber with permanent magnet embedded in contact

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specific Embodiment approach 1

[0034] Specific implementation mode one: the following combination figure 1 To Fig. 8, this embodiment is described. In this embodiment, a vacuum DC interrupter in which permanent magnets are embedded in the contacts,

[0035] Including cup-shaped moving contact 1, cup-shaped static contact 2, ceramic shell 3, sealing bellows 4 and arc extinguishing grid assembly 5;

[0036] Two through holes are relatively opened on the two opposite surfaces of the ceramic housing 3 up and down;

[0037] The cup-shaped moving contact 1 and the cup-shaped static contact 2 both include a cylindrical lead-out tube and a base part. One piece;

[0038] The base parts of the cup-shaped moving contact 1 and the cup-shaped static contact 2 are relatively arranged in the ceramic housing 3, and the head ends of the cylindrical lead-out tubes of the cup-shaped moving contact 1 and the cup-shaped static contact 2 pass through the ceramic shell respectively. Two through holes opposite to the housing 3;...

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Abstract

The invention discloses a vacuum direct-current arc extinguish chamber with a permanent magnet embedded in a contact, and belongs to the field of vacuum direct-current arc extinguish. The problems that an existing vacuum direct-current arc extinguishing chamber is difficult in arc extinguishing and poor in arc extinguishing effect are solved. Two opposite surfaces of a ceramic shell are oppositely provided with two through holes; each of a cup-shaped moving contact and a cup-shaped static contact comprises a cylindrical lead-out tube and a base part, the head end of the cylindrical lead-out tube is a cup opening, and the tail end of the cylindrical lead-out tube is fixedly connected with the center of the base part to form an integrated piece; the base parts of the cup-shaped moving contact and the cup-shaped static contact are oppositely arranged in the ceramic shell; the cylindrical lead-out pipes of the cup-shaped moving contact and the cup-shaped static contact respectively pass through two opposite through holes of the ceramic shell; s sealing corrugated pipe is arranged on the cylindrical lead-out pipe of the cup-shaped moving contact in a sleeving manner and is positioned in the ceramic shell; and the cylindrical outlet pipes of the cup-shaped moving contact and the cup-shaped static contact are respectively provided with cylindrical permanent magnets, and two opposite magnetic poles of the two cylindrical magnets have the same magnetism. The vacuum direct-current arc extinguish chamber is suitable for vacuum direct-current arc extinguishing.

Description

technical field [0001] The invention belongs to the field of vacuum DC arc extinguishing. Background technique [0002] The arc affects the life of each switching device and provides an important channel for the release of energy in the circuit, but it will prolong the breaking time of the circuit, and the burning of the contacts will reduce the service life of the electrical appliance. In severe cases, it may cause the switching appliance to burn out and eventually cause breaking fail. Therefore, how to quickly extinguish the arc, reduce the burning loss of the outer layer of the contact due to the high-temperature arc, prolong the overall service life of the switching device, and improve the breaking performance of the entire system are key issues in this field. [0003] Compared with the AC arc, there is no natural zero-crossing point in the DC arc, and necessary measures must be taken to extinguish the arc, which makes it much more difficult to extinguish the DC arc tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/664H01H33/08H01H33/18
CPCH01H33/664H01H33/08H01H33/182
Inventor 周学周雨馨李东晖翟国富
Owner HARBIN INST OF TECH
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