CN219534457U

CN219534457U - Arc extinguishing chamber

Info

Publication number: CN219534457U
Application number: CN202321094335.5U
Authority: CN
Inventors: 林雷宇
Original assignee: Wenzhou Wusheng Electric Appliance Co ltd
Current assignee: Wenzhou Wusheng Electric Appliance Co ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-08-15
Anticipated expiration: 2033-05-05

Abstract

The utility model discloses an arc-extinguishing chamber, which comprises a left shell, a right shell and a plurality of arc-extinguishing grid sheets, wherein the left shell and the right shell form a shell, the arc-extinguishing grid sheets are arranged between the left shell and the right shell, and each arc-extinguishing grid sheet is arranged along the front-rear direction; an arc-extinguishing cavity is arranged behind the arc-extinguishing gate sheet in the shell, an exhaust port is arranged behind the arc-extinguishing cavity, an arc-extinguishing component is arranged on an exhaust path in the arc-extinguishing cavity, and a through hole is arranged on the arc-extinguishing component. The arc-extinguishing chamber has reasonable structural design, can effectively extinguish the arc in the arc-extinguishing chamber, and improves the arc-extinguishing performance of the arc-extinguishing chamber, thereby ensuring the breaking capacity of the circuit breaker and having good practicability.

Description

Arc extinguishing chamber

Technical Field

The utility model belongs to the field of structural design of arc extinguishing devices, and particularly relates to an arc extinguishing chamber for a circuit breaker.

Background

The circuit breaker is through controlling braking, the static contact switch-on circuit and the switching electrical apparatus of circuit that cuts off when separating, can produce a large amount of electric arcs between moving contact and the static contact at the in-process of cutting off circuit, and the production of electric arc is accompanied with high temperature high pressure, if not in time disperse the arc extinction can break down even burn out the circuit breaker, seriously influence the breaking property and the life of circuit breaker, in order to extinguish the electric arc fast, can set up the explosion chamber in the circuit breaker generally, the advantage of explosion chamber is crucial to the influence of circuit breaker breaking property. The arc extinguishing chamber commonly used in the prior art comprises a shell and a plurality of arc extinguishing grid sheets arranged in the shell, and an arc enters the arc extinguishing chamber and is cut into a short arc through the arc extinguishing grid sheets, so that the effect of rapidly extinguishing the arc is achieved; the problems of such an arc extinguishing chamber in practical use are: the arc is extinguished only through the arc extinguishing bars, the arc extinguishing structure is simple, the flow path of arc gas is single, and the arc extinguishing capability is limited.

Disclosure of Invention

In view of the above, the utility model aims to provide an arc extinguishing chamber with good arc extinguishing effect.

The technical scheme for realizing the aim of the utility model is as follows:

the utility model provides an arc-extinguishing chamber, which comprises a left shell, a right shell and a plurality of arc-extinguishing grid sheets, wherein the left shell and the right shell form a shell, the arc-extinguishing grid sheets are arranged between the left shell and the right shell, and each arc-extinguishing grid sheet is arranged along the front-rear direction; the inner arc extinguishing grating sheet of casing rear is equipped with the arc extinguishing chamber, is equipped with the gas vent behind the arc extinguishing chamber, be equipped with the arc extinguishing part on the internal exhaust path of arc extinguishing chamber, the through-hole has been arranged on the arc extinguishing part.

In a further technical scheme of the utility model, the arc extinguishing component is of a silk screen or mesh plate structure.

In a further technical scheme of the utility model, the arc extinguishing component is made of gas generating material or stainless steel material.

In a further technical scheme of the utility model, a plurality of inclined air blocking blocks are arranged in the arc extinguishing cavity at intervals in the upper-lower direction, and air passing channels for passing exhaust gas are formed between adjacent air blocking blocks.

In a further technical scheme of the utility model, the arc extinguishing component is square, and all the air blocking blocks are positioned at the inner side of the arc extinguishing component.

In a further technical scheme of the utility model, the arc extinguishing component is sheet-shaped, and the arc extinguishing component is inserted and arranged at the front side or the rear side or both the front side and the rear side of the air blocking block in the arc extinguishing cavity.

In a further technical scheme of the utility model, the air baffle comprises a plurality of left air baffle blocks integrally formed on the left shell and a plurality of right air baffle blocks integrally formed on the right shell, and the left air baffle blocks and the right air baffle blocks are in butt joint one by one.

In a further technical scheme of the utility model, one of the left shell and the right shell is provided with a positioning notch, and the other is provided with a positioning lug matched with the positioning notch.

In a further technical scheme of the utility model, the inner side surfaces of the left shell and the right shell are respectively provided with a positioning caulking groove which is in caulking connection with the corresponding side wall of each arc extinguishing grid piece.

In a further technical scheme of the utility model, convex strips extending along the up-down direction are arranged on the front parts of the arc extinguishing cavities on the inner side surfaces of the left shell and the right shell, air guide slopes are arranged between adjacent arc extinguishing grid sheets on the front sides of the convex strips, the rear ends of the air guide slopes are connected with the inner end surfaces of the convex strips in a flush manner, and the distance between the left and right opposite air guide slopes is gradually reduced in the front-to-back direction.

The utility model has the positive effects that: (1) The arc extinguishing chamber is reasonable in structural design and has good arc extinguishing effect, an arc is generated at the front part of the arc extinguishing chamber in actual use, the arc is cut into a section of short arc to be extinguished through the arc extinguishing grid plate in the process of moving backwards towards the arc extinguishing chamber, in order to ensure the arc extinguishing effect, an arc extinguishing cavity is arranged behind the arc extinguishing grid plate, the arc which is not extinguished is further cut off after entering the arc extinguishing cavity and passing through an arc extinguishing component, so that the effective extinction of the arc is ensured, the arc extinguishing effect of the arc extinguishing chamber is ensured, and an exhaust port is arranged behind the arc extinguishing cavity for discharging high-pressure gas; (2) In the arc extinguishing chamber, the arc extinguishing component can be of a mesh plate structure or a silk screen structure, so that the cutting capability of an arc is improved and the arc extinguishing effect is enhanced by increasing the number of holes; the arc suppression component may be of stainless steel or may be made of a gas generating material, such as melamine, nylon, polyoxymethylene, etc., which may generate gas when subjected to high temperatures to accelerate arc extinction.

Drawings

These and/or other aspects, features and advantages of the present disclosure will become more apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

fig. 1 is a schematic structural view of an arc extinguishing chamber according to the present utility model;

fig. 2 is a schematic view of the arc chute of fig. 1 from another perspective;

fig. 3 is a front view of the arc chute of fig. 1;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic view of the structure of the arc extinguishing chamber with the left housing removed;

FIG. 6 is a schematic view of the left housing in the present utility model;

FIG. 7 is a schematic view of the right housing in the present utility model;

fig. 8 is a schematic structural view of a first arc extinguishing member according to the present utility model;

fig. 9 is a schematic structural view of a second arc extinguishing member according to the present utility model;

fig. 10 is a schematic structural view of a third arc extinguishing member according to the present utility model;

fig. 11 is a schematic structural view of a fourth arc extinguishing member in the present utility model.

The reference numerals shown in the figures are: 1-left shell; 2-right shell; 3-arc extinguishing grid plates; 4-arc extinguishing cavity; 41-exhaust port; 42-air blocking block; 43-overgas channel; 421-left air baffle; 422-right air block; 5-arc extinguishing component; 6-positioning a notch; 7-positioning the protruding blocks; 8-positioning caulking grooves; 9-convex strips; 91-an air guiding slope.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model.

The arc extinguishing chamber structure of the embodiment is shown in fig. 1 to 7, and comprises a left shell 1 and a right shell 2 which form a shell, and a plurality of arc extinguishing grid plates 3 arranged between the left shell 1 and the right shell 2, wherein the left shell 1 and the right shell 2 can be fixedly connected by rivet riveting, and each arc extinguishing grid plate 3 is arranged along the front-back direction; an arc extinguishing cavity 4 is arranged behind the arc extinguishing gate plate 3 in the shell, an exhaust port 41 is arranged behind the arc extinguishing cavity 4, an arc extinguishing component 5 is arranged on an exhaust path in the arc extinguishing cavity 4, and a through hole is arranged on the arc extinguishing component 5; adopt the explosion chamber structure in this embodiment, at the explosion chamber front portion production electric arc during actual use, the electric arc is cut into one section short electric arc through arc extinguishing bars piece 3 in the in-process that the electric arc moved to the explosion chamber backward and is put out the arc, further in order to improve the extinction effect of explosion chamber, still set up arc extinguishing chamber 4 at arc extinguishing bars piece 3 rear, the electric arc that does not go out is further cut off after getting into arc extinguishing chamber 4 and when passing through arc extinguishing member 5 to ensure the extinction effect of explosion chamber, set up gas vent 41 at arc extinguishing chamber 4 rear and be used for discharging high-pressure gas.

The arc extinguishing member 5 in the present embodiment is a mesh plate structure (through holes are distributed thereon) as shown in fig. 8 and 10; in actual operation, the arc extinguishing component 5 can also be of a silk screen structure, so that the cutting capability of the electric arc is improved by increasing the number of holes, and the arc extinguishing effect is enhanced, as shown in fig. 9 and 11; the arc extinguishing member 5 may be made of stainless steel, or may be made of a gas generating material, such as melamine, nylon, polyoxymethylene, etc., which generates gas when subjected to high temperatures to accelerate arc extinction.

In a further embodiment, a plurality of inclined gas-blocking blocks 42 are arranged in the arc-extinguishing chamber 4 at intervals in the up-down direction, a gas-passing channel 43 for passing the exhaust gas is formed between the adjacent gas-blocking blocks 42, the arc gas is divided and cooled by the gas-blocking blocks 42, and the gas flow path can be changed, so that the arc can be extinguished more fully in the arc-extinguishing chamber.

The air blocking block 42 comprises a plurality of left air blocking blocks 421 integrally formed on the left shell 1 and a plurality of right air blocking blocks 422 integrally formed on the right shell 2, and the plurality of left air blocking blocks 421 are in butt joint with the plurality of right air blocking blocks 422 one by one.

Referring to fig. 5, in the present embodiment, the arc extinguishing member 5 is in a square frame shape, as shown in fig. 8 and 9, all the air blocking blocks 42 are located inside the arc extinguishing member 5, and the arc extinguishing member 5 can be installed around the air blocking blocks 42 during installation; as a modification, the arc extinguishing member 5 may be formed in a sheet shape, and as shown in fig. 10 and 11, the arc extinguishing member 5 is inserted into the arc extinguishing chamber 4 at the front side or the rear side or both the front side and the rear side of the air blocking block 42.

Further, as shown in fig. 6 and 7, the left casing 1 is provided with a positioning notch 6, the right casing 2 is provided with a positioning projection 7, and the positioning projection 7 is matched with the positioning notch 6 to play a role in positioning when the left casing 1 and the right casing 2 are in butt joint; in actual operation, the positioning notch 6 may be provided on the right housing 2, and the positioning projection 7 may be provided on the left housing 1.

In this embodiment, the front portions of the arc extinguishing chambers 4 on the inner side surfaces of the left and right housings 1 and 2 are provided with convex strips 9 extending in the vertical direction, the front sides of the convex strips 9 are provided with air guide slopes 91 between the adjacent arc extinguishing grid plates 3, the rear ends of the air guide slopes 91 are flush with the inner end surfaces of the convex strips 9, and the left and right opposite air guide slopes 91 are gradually reduced in distance in the front-to-back direction, so that an arc can enter the middle portion of the arc extinguishing chamber 4 under the guiding action of the air guide slopes 91 when passing through the gaps between the arc extinguishing grid plates 3.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While those obvious variations or modifications which come within the spirit of the utility model remain within the scope of the utility model.

Claims

1. An arc extinguishing chamber comprises a left shell (1) and a right shell (2) which form a shell, and a plurality of arc extinguishing grid plates (3) arranged between the left shell (1) and the right shell (2), wherein each arc extinguishing grid plate (3) is arranged along the front-back direction; the novel arc extinguishing device is characterized in that an arc extinguishing cavity (4) is arranged behind the arc extinguishing grid plate (3) in the shell, an exhaust port (41) is arranged behind the arc extinguishing cavity (4), an arc extinguishing component (5) is arranged on an exhaust path in the arc extinguishing cavity (4), and through holes are arranged on the arc extinguishing component (5).

2. The arc chute according to claim 1, characterized in that the arc extinguishing member (5) is of wire mesh or mesh plate structure.

3. An arc chute as claimed in claim 2, characterized in that said arc extinguishing member (5) is made of a gas generating material or of stainless steel.

4. The arc extinguishing chamber according to claim 2, wherein a plurality of inclined gas blocking blocks (42) are provided in the arc extinguishing chamber (4) at intervals in the up-down direction, and a gas passing passage (43) through which the exhaust gas passes is formed between adjacent gas blocking blocks (42).

5. The arc extinguishing chamber according to claim 4, characterized in that the arc extinguishing member (5) is box-shaped, all the gas barrier blocks (42) being inside the arc extinguishing member (5).

6. The arc extinguishing chamber according to claim 4, characterized in that the arc extinguishing component (5) is sheet-shaped, and the arc extinguishing component (5) is inserted and arranged at the front side or the rear side or both the front side and the rear side of the gas blocking block (42) in the arc extinguishing chamber (4).

7. The arc extinguishing chamber according to claim 4, wherein the air blocking block (42) includes a plurality of left air blocking blocks (421) integrally formed on the left case (1) and a plurality of right air blocking blocks (422) integrally formed on the right case (2), and the plurality of left air blocking blocks (421) and the plurality of right air blocking blocks (422) are in one-to-one butt joint.

8. The arc extinguishing chamber according to claim 1, characterized in that one of the left housing (1) and the right housing (2) is provided with a positioning notch (6), and the other is provided with a positioning lug (7) which is matched with the positioning notch (6).

9. The arc extinguishing chamber according to claim 1, characterized in that the inner side surfaces of the left shell (1) and the right shell (2) are respectively provided with a positioning caulking groove (8) which is in caulking connection with the corresponding side wall of each arc extinguishing gate sheet (3).

10. The arc extinguishing chamber according to claim 1, wherein the inner side surfaces of the left shell (1) and the right shell (2) are provided with convex strips (9) extending along the up-down direction at the front part of the arc extinguishing cavity (4), the front side of each convex strip (9) is provided with an air guide slope (91) between the adjacent arc extinguishing grid plates (3), the rear ends of the air guide slopes (91) are in flush connection with the inner end surfaces of the convex strips (9), and the distance between the left and right opposite air guide slopes (91) is gradually reduced in the front-to-back direction.