Arc extinguish chamber and circuit breaker or isolating switch

Abstract

The invention belongs to the technical field of switches, and particularly relates to an arc extinguish chamber and a circuit breaker or an isolating switch, a partition plate structure is adopted to divide the upper portion of the arc extinguish chamber into a plurality of independent spaces, the arc extinguish chamber and the lower portion of the arc extinguish chamber are integrally divided into a plurality of series arc extinguish chambers, and each space is provided with a pressure relief channel connected with the outside. After arc starting of the circuit breaker or the disconnecting switch, the motion of the arc in each subarea is mutually independent, gas in a high-pressure area of an area with strong magnetic blow-out is prevented from entering a low-pressure area with weak magnetic blow-out, the area with small magnetic blow-out force is effectively promoted to enter grid pieces (such as several grid pieces at the tail end of one side of a moving contact), and the arc extinguishing performance of the grid pieces of the arc extinguishing chamber is improved.

Description

Technical Field

[0001] This application belongs to the technical field of switches, and specifically relates to an arc extinguishing chamber and a circuit breaker or disconnector. Background Art

[0002] In the prior art, the air outlets of each grid piece in the arc extinguishing chamber are usually interconnected. During the arcing process, the magnetic blow force on some areas of the arc is relatively strong, and it enters the arc extinguishing chamber relatively quickly. The rapid movement will increase the pressure above the arc extinguishing chamber. As the pressure propagates above the arc extinguishing chamber, it will thus inhibit the arc in the area with a smaller magnetic blow force from entering the grid pieces (such as the end of the moving side). Summary of the Invention

[0003] In order to solve the above technical problems, this application provides the following technical solutions:

[0004] An arc extinguishing chamber, the upper space of the arc extinguishing chamber is divided into multiple independent spaces, and each independent space has a venting channel connected to the outside.

[0005] Preferably, the upper space of the arc extinguishing chamber is divided into two or more independent spaces by at least one or several partition plates. The lower part of the partition plate is attached to the top of a certain grid piece, and the upper part of the partition plate is attached to the top of the arc extinguishing chamber.

[0006] Preferably, it includes a first upper partition plate of the arc extinguishing chamber and a second upper partition plate of the arc extinguishing chamber.

[0007] Preferably, the first upper partition plate of the arc extinguishing chamber is arranged on the static side of the arc extinguishing chamber.

[0008] Preferably, the first upper partition plate of the arc extinguishing chamber is at a distance of 1 / 4 - 1 / 3 of the width of the arc extinguishing chamber from the static side arc starting plate.

[0009] Preferably, several partition plates are arranged on the left and right sides of the first upper partition plate of the arc extinguishing chamber.

[0010] Preferably, the second upper partition plate of the arc extinguishing chamber is located above the grid piece at the position where the moving contact is opened.

[0011] Preferably, several partition plates are arranged on the left and right sides of the second upper partition plate of the arc extinguishing chamber.

[0012] Preferably, the partition plate is made of a metal material or a non-metal material.

[0013] A circuit breaker or disconnector, including an arc extinguishing chamber as described in any one of the foregoing items.

[0014] Compared with the prior art, the beneficial effects achieved by the present application are as follows: The partition structure is adopted to divide the upper part of the arc extinguishing chamber into multiple independent spaces, and the lower arc extinguishing chamber as a whole is divided into multiple series-connected arc extinguishing chambers. Each space has a pressure relief channel connected to the outside. After the circuit breaker or disconnector arcs, the arcs move independently within each partition, preventing the high-pressure gas in the area with strong magnetic blow from flowing to the low-pressure area with weak magnetic blow, effectively promoting the gas in the area with relatively weak magnetic blow force to enter the grid pieces (such as the last few grid pieces at the end of the moving contact side), and improving the arc extinguishing performance of the grid pieces in the arc extinguishing chamber. Brief Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application, but do not constitute a limitation to the present application. In the drawings:

[0016] Figure 1 is a three-dimensional view of the overall mechanism diagram of the present application;

[0017] Figure 2 is a plan view of the overall mechanism diagram of the present application;

[0018] In the figure: moving contact assembly 1, moving contact busbar 11, arc extinguishing chamber 2, upper space 21 of the arc extinguishing chamber, upper partition 22 of the arc extinguishing chamber, upper space 23 of the arc extinguishing chamber, upper partition 24 of the arc extinguishing chamber, upper space 25 of the arc extinguishing chamber, pressure relief outlet 26, static contact 3, gas generating part 4, static side arc initiating plate 5, moving side arc initiating plate 6. Detailed Embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0021] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] As Figures 1 to 2 shown, this embodiment provides an arc extinguishing chamber and a circuit breaker or a disconnector, specifically:

[0023] The circuit breaker or the disconnector includes a moving contact, a static contact corresponding to the moving contact, and a gas generating part installed below the arc extinguishing grid. A pressure relief channel is provided at the top of the arc extinguishing chamber.

[0024] The upper part of the arc extinguishing chamber is divided into multiple independent spaces by a partition structure, and the overall arc extinguishing chamber below is divided into multiple series arc extinguishing chambers. Each space has a pressure relief channel connected to the outside. After the circuit breaker or the disconnector arcs, the arcs in each partition move independently, avoiding the gas in the high-pressure area of the area with strong magnetic blowout flowing to the low-pressure area with weak magnetic blowout, effectively promoting the arcs in the area with relatively small magnetic blowout force to enter the grid (such as the last few grids on the side of the moving contact), and improving the arc extinguishing performance of the grid in the arc extinguishing chamber.

[0025] Furthermore, the material of the partition can be metal or plastic insulating parts.

[0026] Furthermore, the lower part of the partition contacts the top of the grid (a small gap can be left), the top of the partition contacts the arc extinguishing cover (a small gap can be left), and the left and right sides of the partition contact the side walls of the arc extinguishing chamber and the arc extinguishing cover (a small gap can be left). This small gap serves as a processing gap and does not need to be processed into a completely sealed gap.

[0027] Furthermore, the partition and the grid can be arranged in parallel or non-parallel. For example, the partition is an S-shaped plate instead of a horizontal plate, and still can achieve a good partitioning effect. Different partitions are not parallel to the grid. For example, the first partition is a horizontal plate and is set with a 5-degree deviation from the vertical plane where the grid is located to the left or right, and the second partition is a horizontal plate and is set with a 10-degree deviation from the vertical plane where the grid is located to the left or right, etc.

[0028] Furthermore, there should be at least two partitions in the partitioning. The first partition is located on the static side of the arc extinguishing chamber, at a distance of 1 / 4 - 1 / 3 of the width of the arc extinguishing chamber from the static side arc initiating plate, and the second partition is located above the grid at the position where the moving contact opens. The arc runs relatively fast in the area between the first partition and the second partition, and runs relatively slowly in the area of 1 / 4 - 1 / 3 close to the static side grid area. Through this kind of partitioning, the arc running in the static side area is not affected by the middle area, and the static side arc is promoted to enter the arc extinguishing chamber.

[0029] Further, the number of partition plates can be increased based on the above two partition plates, and the positions of the above two partition plates remain unchanged.

[0030] Further, based on the above two partition plates, multiple partition plates can be added in pairs on the left and right of the first partition plate. The first partition plate is located in the middle of the newly added multiple partition plates, or they can be added without being paired. Several partition plates can be added to the left area to further divide the left area of the first partition plate into multiple areas, or several partition plates can be added to the right area to further divide the right area of the first partition plate into multiple areas.

[0031] Further, based on the above two partition plates, multiple partition plates can be added in pairs on the left and right of the second partition plate. The second partition plate is located in the middle of the newly added multiple partition plates, or they can be added without being paired. Several partition plates can be added to the left area to further divide the left area of the second partition plate into multiple areas, or several partition plates can be added to the right area to further divide the right area of the second partition plate into multiple areas.

[0032] The number of partition plates in this application is not limited to one, two or multiple. The purpose of the arc extinguishing chamber is to isolate the areas with slower and faster arc running of the arc, divide the upper part into multiple independent spaces, and divide the lower arc extinguishing chamber as a whole into multiple series-connected arc extinguishing chambers to avoid mutual influence.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Finally, it should be noted that the above are only the preferred embodiments of this application and are not used to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. An arc extinguishing chamber, characterized in that, The upper space of the arc extinguishing chamber is divided into multiple independent spaces, and each independent space has a gas leakage channel connected to the outside.

2. An arc extinguishing chamber according to claim 1, characterized in that, The upper space of the arc extinguishing chamber is divided into two or more independent spaces by at least one or several partition plates. The lower part of the partition plate is attached to the top of a certain grid piece, and the upper part of the partition plate is attached to the top of the arc extinguishing chamber.

3. The arc extinguishing chamber according to claim 2, characterized in that, It includes the upper partition plate one of the arc extinguishing chamber and the upper partition plate two of the arc extinguishing chamber.

4. An arc extinguishing chamber according to claim 3, characterized in that, The upper partition plate one of the arc extinguishing chamber is arranged on the static side of the arc extinguishing chamber.

5. An arc extinguishing chamber as claimed in claim 4, wherein, The upper partition plate one of the arc extinguishing chamber is at a distance of 1 / 4 - 1 / 3 of the width of the arc extinguishing chamber from the static side arc ignition plate.

6. An arc extinguishing chamber according to any one of claims 4 to 5, characterized in that, Several partition plates are arranged on the left and right sides of the upper partition plate one of the arc extinguishing chamber.

7. The arc extinguishing chamber according to claim 3, characterized in that, The upper partition plate two of the arc extinguishing chamber is located above the grid piece position at the opening position of the moving contact.

8. An arc extinguishing chamber according to claim 7, characterized in that, Several partition plates are arranged on the left and right sides of the upper partition plate two of the arc extinguishing chamber.

9. An arc extinguishing chamber according to claim 2, characterized in that, The partition plate is made of metal or non-metal material.

10. A circuit breaker or disconnecting switch, characterized in that, It includes an arc extinguishing chamber according to any one of claims 1 to 9.

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