Arc extinguish chamber

Abstract

The utility model relates to an arc extinguish chamber, which comprises two flash barriers and an arc extinguish grid plate, wherein the two flash barriers are arranged oppositely; the arc extinguish grid plate is arranged between the two flash barriers; the arc extinguishing grid plates comprise two first arc extinguishing grid plates and a second arc extinguishing grid plate located between the two first arc extinguishing grid plates; the first arc extinguishing grid sheet is of a U-shaped sheet structure, and two sides of the first arc extinguishing grid sheet form insertion sheet parts extending forwards; a connecting clamping plate is arranged at the position, corresponding to the first arc extinguishing grid piece, of the inner side of each flash barrier, a connecting clamping groove extending in the front-back direction is formed in each connecting clamping plate, the piece inserting part of each first arc extinguishing grid piece is inserted into the corresponding connecting clamping groove in the corresponding flash barrier to form locking, and therefore the two flash barriers are connected together through the first arc extinguishing grid pieces. According to the utility model, the arc extinguish chamber structure is optimally designed, the structure is simple, the assembly is convenient, and the production efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to an arc extinguishing chamber and belongs to the field of switch accessory structure design. Background Art

[0002] Arc extinguishing chamber is an important component of switch-type electrical products such as circuit breakers and disconnectors. Most of them have multiple layers of arc extinguishing grids arranged at intervals. When the switch is opened, the arc generated at the contact enters the arc extinguishing chamber. Through the cutting action of the arc extinguishing grid, the long arc is divided into multiple short arcs, achieving the arc extinguishing effect and ensuring the safety of the electrical system.

[0003] Most traditional arc extinguishing chambers are riveted arc extinguishing chambers, which include two arc-isolating plates arranged opposite to each other and a plurality of arc-extinguishing grids arranged between the two arc-isolating plates. At least two protrusions are arranged on both sides of each arc-extinguishing grid. Positioning holes are arranged on the arc-isolating plates corresponding to the protrusions. During assembly, the protrusions are aligned with the positioning holes and pressed into the positioning holes, and then the protrusions are fixedly connected to the arc-isolating plates by riveting. During the production of this type of arc extinguishing chamber, it is more troublesome to align the protrusions with the positioning holes, and multiple riveting is required. Therefore, the assembly process is cumbersome and the production efficiency is low. Utility Model Content

[0004] In this regard, an object of the utility model is to provide an arc extinguishing chamber that is easy to assemble.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an arc extinguishing chamber, comprising two arc extinguishing plates arranged opposite to each other and an arc extinguishing grid arranged between the two arc extinguishing plates; the arc extinguishing grid comprises two first arc extinguishing grids and a second arc extinguishing grid arranged between the two first arc extinguishing grids;

[0007] The first arc-extinguishing grid is a U-shaped structure, with two sides forming inserting portions extending forward;

[0008] A connecting card plate is provided on the inner side of the arc isolation plate at a position corresponding to the first arc extinguishing grid, and a connecting card slot extending along the front-to-back direction is provided on the connecting card plate. The insert portion of the first arc extinguishing grid is inserted into the corresponding connecting card slot on the arc isolation plate to form a lock, thereby connecting the two arc isolation plates together through the first arc extinguishing grid.

[0009] In some embodiments, the connecting slot has a limit stop edge that cooperates with the inner side edge of the insert portion.

[0010] In some embodiments, a first locking portion is provided on a side of the inserting piece, and a first limiting portion is provided on a side wall of the connecting slot, and the first locking portion is engaged with the first limiting portion to limit the inserting piece from withdrawing backward from the connecting slot.

[0011] In some embodiments, a positioning slot extending in the front-to-back direction is provided on the inner side wall of the arc isolation plate, and the outer side edge of the second arc extinguishing grid is plugged into and matched with the positioning slot;

[0012] A second clamping portion is provided on the outer side of the second arc-extinguishing grid, a second limiting portion is provided in the positioning slot, and the second clamping portion and the second limiting portion are clamped and cooperated to limit the second arc-extinguishing grid.

[0013] In some embodiments, a baffle is provided at the front edge of the arc isolation plate for blocking and limiting the front ends of the first arc extinguishing grid and the second arc extinguishing grid.

[0014] In some embodiments, the second arc-extinguishing grid is a U-shaped structure with its opening facing forward.

[0015] In some embodiments, the first arc-extinguishing grid has the same structure as the second arc-extinguishing grid.

[0016] The utility model has the positive effects that the arc extinguishing chamber structure in the utility model is optimized in design, and no riveting is required during assembly, the process is simple, and the assembly is convenient, thus facilitating the improvement of production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0018] Figure 1 It is a three-dimensional diagram of the arc extinguishing chamber in the utility model;

[0019] Figure 2 for Figure 1 A front view of the arc extinguishing chamber shown;

[0020] Figure 3 For along Figure 2 Sectional view cut along line AA;

[0021] Figure 4 For along Figure 2 Sectional view cut along the midline BB;

[0022] Figure 5 It is an exploded view of the arc extinguishing chamber in the utility model;

[0023] Figure 6 It is a structural schematic diagram of the arc partition plate of the utility model.

[0024] The reference numerals shown in the figure are: 1-arc isolation plate; 11-connecting clamping plate; 12-connecting clamping slot; 13-limiting edge; 14-first limiting portion; 15-positioning slot; 16-second limiting portion; 17-baffle; 2-first arc extinguishing grid; 21-insertion portion; 22-first clamping portion; 3-second arc extinguishing grid; 31-second clamping portion. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The arc extinguishing chamber structure in this embodiment is as follows Figures 1 to 6 As shown, it comprises two arc-isolating plates 1 arranged opposite to each other and an arc-extinguishing grid arranged between the two arc-isolating plates 1; the arc-extinguishing grid comprises two first arc-extinguishing grids 2 and a second arc-extinguishing grid 3 located between the two first arc-extinguishing grids 2; the first arc-extinguishing grid 2 is a U-shaped structure, and both sides thereof form a plug-in portion 21 extending forward; a connecting card plate 11 is provided at a position corresponding to the first arc-extinguishing grid 2 on the inner side of the arc-isolating plate 1, and a connecting card slot 12 extending in the front-to-back direction is provided on the connecting card plate 11, and the plug-in portion 21 of the first arc-extinguishing grid 2 is provided at the inner side of the arc-isolating plate 1. 1 is inserted into the corresponding connecting slots 12 on the arc isolation plates 1 to form a lock, so that the two arc isolation plates 1 are connected together through the first arc extinguishing grid 2; the arc extinguishing chamber structure in this embodiment is optimized and designed, and no riveting is required during assembly, the process is simple, the assembly is convenient, and it is beneficial to improve production efficiency; specifically, during assembly, the inserting portions 21 on the two first arc extinguishing grids 2 are plugged and locked with the connecting slots 12 on the arc isolation plates 1 on both sides, so that the two arc isolation plates 1 are fixed at a distance, and then the second arc extinguishing grid 3 is installed between the two arc isolation plates 1.

[0027] like Figure 3 As shown, the connection slot 12 has a limit stop edge 13 that cooperates with the inner side edge of the inserting piece 21. The limit stop edge 13 abuts against the inner side edge of the inserting piece 21 to prevent the inserting piece 21 from detaching from the inner side of the connection slot 12, thereby enhancing the stability of the positioning connection.

[0028] Continue to view Figure 3 A first locking portion 22 is provided on the side of the inserting portion 21, and a first limiting portion 14 is provided on the side wall of the connecting slot 12. The first locking portion 22 is engaged with the first limiting portion 14 to limit the inserting portion 21 from withdrawing backward from the connecting slot 12, thereby ensuring that the inserting portion 21 is reliably connected to the connecting slot 12 and ensuring the stability of the structure.

[0029] like Figure 4 As shown, a positioning slot 15 extending in the front-to-back direction is provided on the inner side wall of the arc-extinguishing plate 1, and the outer side edge of the second arc-extinguishing grid 3 is plugged into the positioning slot 15, so that the second arc-extinguishing grid 3 is positioned in the up-down direction through the positioning slot 15, and a second clamping portion 31 is provided on the outer side edge of the second arc-extinguishing grid 3, and a second limiting portion 16 is provided in the positioning slot 15, and the second clamping portion 31 is engaged with the second limiting portion 16 to resist and limit the second arc-extinguishing grid 3, so as to ensure the stability of the second arc-extinguishing grid 3 installed on the arc-extinguishing plate 1; during assembly, the two side edges of the second arc-extinguishing grid 3 are inserted forward from the rear port of the positioning slot 15, and when the second arc-extinguishing grid 3 is plugged into place, the second clamping portion 31 is engaged with the second limiting portion 16 to prevent the second arc-extinguishing grid 3 from withdrawing backward.

[0030] Exemplarily, the first locking portion 22 and the second locking portion 31 are locking protrusions respectively arranged on the outer sides of the first arc-extinguishing grid 2 and the second arc-extinguishing grid 3, and the first limiting portion 14 and the second limiting portion 16 are locking slots respectively arranged in the connecting slot 12 and the positioning slot 15.

[0031] In this embodiment, a baffle 17 is provided at the front edge of the arc isolation plate 1 for blocking and limiting the front ends of the first arc extinguishing grid 2 and the second arc extinguishing grid 3. The baffle 17 and the front ends of the first arc extinguishing grid 2 and the second arc extinguishing grid 3 are blocked and limited to ensure that the assembly is in place. In addition, the baffle 17 can block the arc and prevent the arc in the arc extinguishing chamber from escaping from the front of the arc extinguishing chamber as much as possible.

[0032] like Figure 4 and Figure 5 As shown, the second arc-extinguishing grid 3 is a U-shaped structure with its opening facing forward. The presence of the front opening of the second arc-extinguishing grid 3 can avoid the position of the moving contact in the circuit breaker so that the moving contact can extend into the arc-extinguishing chamber, which is beneficial to improving the arc-extinguishing performance.

[0033] Further, combined with Figures 3 to 5 As shown, the first arc-extinguishing grid 2 and the second arc-extinguishing grid 3 have the same structure, which reduces the number of components and facilitates stocking and assembly.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An arc extinguishing chamber, comprising two arc extinguishing plates (1) arranged opposite to each other and an arc extinguishing grid arranged between the two arc extinguishing plates (1); the arc extinguishing grid comprises two first arc extinguishing grids (2) and a second arc extinguishing grid (3) arranged between the two first arc extinguishing grids (2); characterized in that: The first arc-extinguishing grid (2) is a U-shaped structure, with two sides thereof forming inserting portions (21) extending forward; A connecting card plate (11) is provided at a position on the inner side of the arc isolation plate (1) corresponding to the first arc extinguishing grid (2); a connecting card slot (12) extending in the front-rear direction is provided on the connecting card plate (11); the inserting piece portion (21) of the first arc extinguishing grid (2) is inserted into the corresponding connecting card slot (12) on the arc isolation plate (1) to form a locking state, thereby connecting the two arc isolation plates (1) together through the first arc extinguishing grid (2).

2. The arc extinguishing chamber according to claim 1, characterized in that: The connecting slot (12) has a limit stop edge (13) that cooperates with the inner side edge of the inserting piece (21).

3. The arc extinguishing chamber according to claim 1, characterized in that: A first locking portion (22) is provided on the side of the inserting piece (21), and a first limiting portion (14) is provided on the side wall of the connecting slot (12); the first locking portion (22) is engaged with the first limiting portion (14) to limit the inserting piece (21) from withdrawing backward from the connecting slot (12).

4. The arc extinguishing chamber according to claim 1, characterized in that: The inner wall of the arc isolation plate (1) is provided with a positioning slot (15) extending in the front-rear direction, and the outer side edge of the second arc extinguishing grid (3) is plugged into and matched with the positioning slot (15); A second clamping portion (31) is provided on the outer side of the second arc-extinguishing grid (3), a second limiting portion (16) is provided in the positioning slot (15), and the second clamping portion (31) and the second limiting portion (16) are clamped and matched to limit the position of the second arc-extinguishing grid (3).

5. The arc extinguishing chamber according to claim 1, characterized in that: The front edge of the arc isolation plate (1) is provided with a baffle (17) for blocking and limiting the front ends of the first arc extinguishing grid (2) and the second arc extinguishing grid (3).

6. The arc extinguishing chamber according to claim 1, characterized in that: The second arc-extinguishing grid (3) is a U-shaped structure, with its opening facing forward.

7. The arc extinguishing chamber according to claim 1, characterized in that: The first arc-extinguishing grid (2) and the second arc-extinguishing grid (3) have the same structure.

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