CN-224217389-U - Arc extinguishing chamber and switching device

CN224217389UCN 224217389 UCN224217389 UCN 224217389UCN-224217389-U

Abstract

The application provides an arc extinguishing chamber and a switching device, and relates to the technical field of switches. The arc extinguishing chamber comprises a first grid sheet, a second grid sheet, an insulating piece and a permanent magnet. The first grid sheet comprises a first base portion, and the second grid sheet comprises a second base portion, wherein the first base portion and the second base portion are arranged at intervals. The insulator is disposed between the first base and the second base. The insulating member is provided with a blind groove, and the notch of the blind groove faces the exhaust side of the arc extinguishing chamber. The permanent magnet is mounted in the blind slot. Wherein the inner side of the permanent magnet, the inner side of the first base and the inner side of the second base are substantially aligned, the inner side being the side remote from the exhaust side. The arc-extinguishing chamber provided by the application can reduce the difficulty of an arc entering the arc-extinguishing chamber when the switching device breaks small current, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber when the switching device breaks small current.

Inventors

SHEN DI
SHI JIAN
WANG HENGYANG
WU CHUNFENG
SUN GANG
HAN CHANG

Assignees

德力西电气有限公司

Dates

Publication Date: 20260508
Application Date: 20250506

Claims (10)

1. An arc chute, comprising: the first grid sheet comprises a first base part, and the second grid sheet comprises a second base part, wherein the first base part and the second base part are arranged at intervals; The insulating piece is arranged between the first base part and the second base part, and is provided with a blind groove, and the notch of the blind groove faces the exhaust side of the arc extinguishing chamber; The permanent magnet is arranged in the blind groove; Wherein the inner side of the permanent magnet, the inner side of the first base and the inner side of the second base are substantially aligned, the inner side being the side remote from the exhaust side.
2. The arc chute according to claim 1, wherein in an arrangement direction of the first and second gate sheets, there is a gap between each of the first and second gate sheets and the insulating member.
3. The arc chute according to claim 2, wherein the first and second gate sheets are arranged in a fan-shape or in parallel in an arrangement direction of the first and second gate sheets.
4. The arc chute of claim 2 wherein the insulator is further provided with a grid slot, the arc chute further comprising a third grid mounted to the grid slot.
5. The arc chute of claim 1 further comprising first and second spaced apart mounting plates; the first grating sheet, the insulating piece and the second grating sheet are positioned between the first mounting plate and the second mounting plate, and the first grating sheet, the insulating piece and the second grating sheet are all mounted on the first mounting plate and the second mounting plate.
6. The arc chute of claim 5 further comprising first and second opposed and spaced apart inner baffles, the first inner baffle being on a side of the first mounting plate facing the second mounting plate and the second inner baffle being on a side of the second mounting plate facing the first mounting plate; And a channel for moving the movable contact is formed between the first inner partition plate and the second inner partition plate.
7. The arc chute of claim 6 wherein the first inner baffle is integrally connected to the first mounting plate.
8. The arc chute according to claim 7, wherein the first mounting plate is provided with a first chute, and a side of the insulating member facing the first mounting plate is provided with a first protrusion, and the first protrusion is adapted to the first chute to mount the insulating plate to the first mounting plate.
9. The arc chute of claim 6 wherein the second inner baffle is integrally connected to the second mounting plate.
10. A switching device comprising a moving contact, a stationary contact and an arc chute according to any one of claims 1 to 9; The static contact is located one side of the arc extinguishing chamber, the moving contact part is located in the arc extinguishing chamber, the moving contact can rotate relative to the static contact so as to be contacted with or separated from the static contact, and the arc extinguishing chamber is used for extinguishing an electric arc generated when the moving contact is separated from the static contact.

Description

Arc extinguishing chamber and switching device Technical Field The application relates to the technical field of switches, in particular to an arc extinguishing chamber and a switching device. Background The switching device has wide application in a power system and is an important device for switching on or off one or more circuit currents so as to control electric equipment and ensure safe and stable operation of the circuit. Switching devices are often provided with an arc extinguishing chamber in order to divert and extinguish an arc generated when a moving contact of the switching device is separated from a stationary contact by the arc extinguishing chamber. However, the switching device in the prior art has a problem that an arc is difficult to enter the arc extinguishing chamber when breaking a small current. Disclosure of utility model The application provides an arc-extinguishing chamber and a switching device, which are used for reducing the difficulty that an arc enters the arc-extinguishing chamber when the switching device breaks small current, so as to improve the arc-extinguishing efficiency of the arc-extinguishing chamber when the switching device breaks small current. In a first aspect, the present application provides an arc chute comprising a first grating sheet, a second grating sheet, an insulator, and a permanent magnet. The first grid sheet comprises a first base portion, and the second grid sheet comprises a second base portion, wherein the first base portion and the second base portion are arranged at intervals. The insulator is disposed between the first base and the second base. The insulating member is provided with a blind groove, and the notch of the blind groove faces the exhaust side of the arc extinguishing chamber. The permanent magnet is mounted in the blind slot. Wherein the inner side of the permanent magnet, the inner side of the first base and the inner side of the second base are substantially aligned, the inner side being the side remote from the exhaust side. Through the scheme, the insulating piece is arranged between the first base part and the second base part, and the permanent magnet is arranged in the blind groove of the insulating piece, so that the permanent magnet can magnetize the first grid sheet and the second grid sheet and the arc-extinguishing grid sheets adjacent to the permanent magnet, and the magnetism of the arc-extinguishing grid sheets adjacent to the permanent magnet, such as the first grid sheet and the second grid sheet, is enhanced. The magnetic arc-extinguishing grid plates such as the first grid plate and the second grid plate which are adjacent to the permanent magnet are enhanced, the attraction to the arc can be enhanced, the arc generated when the switching device comprising the arc-extinguishing chamber breaks small current can enter the arc-extinguishing chamber, and therefore the arc-extinguishing efficiency of the arc-extinguishing chamber when the switching device breaks small current can be improved. More importantly, the inner side of the permanent magnet is disposed in substantial alignment with the inner side of the first base and the inner side of the second base. Since the arc moves from the inside to the exhaust side of the arc extinguishing chamber in the arc extinguishing chamber, the inside of the permanent magnet is the part of the permanent magnet that is first contacted with the arc, so the arrangement is such that the permanent magnet can approach the arc as early as possible to enhance the attraction effect on the arc. Further, under the condition that the attraction effect of the permanent magnet to the electric arc is enhanced, the volume of the permanent magnet is not required to be larger, the inner side of the small-volume permanent magnet is only required to be arranged to be basically aligned with the inner sides of the first base part and the second base part, and the electric arc can be quickly attracted and elongated towards the directions of the first base part and the second base part in the initial stage of generation, so that the cost is saved and the better arc extinguishing effect is realized. In one possible design, the first and second gate sheets each have a gap from the insulating member in the arrangement direction of the first and second gate sheets. Through the scheme, gaps are reserved between the first grid plate and the second grid plate and the permanent magnet, so that the permanent magnet can cut an arc corresponding to one arc-extinguishing grid plate, the permanent magnet can cut the arc like the arc-extinguishing grid plates when magnetizing the first grid plate and the second grid plate and keeping the functions of adjacent arc-extinguishing grid plates, and the quantity of the arc-extinguishing grid plates cannot be lost due to occupation of arrangement space of the original arc-extinguishing grid plates. In one possible design, the first and second grid plates are arranged in a