Arc extinguishing chamber flame extinguishing structure and arc extinguishing device

Abstract

The utility model discloses an arc extinguishing chamber flameout structure and arc extinguishing device, including setting up a plurality of air holes's flameout piece and installing in the arc extinguishing chamber top's arc extinguishing chamber baffle, be equipped with a plurality of mutually interval setting and with installing in the arc extinguishing chamber's arc extinguishing grid piece group top end corresponding first baffle muscle strip in the arc extinguishing chamber baffle, the flameout piece is configured as close to set up on each first baffle muscle strip upper end. The utility model discloses the flameout piece close to each first baffle muscle strip in the arc extinguishing chamber baffle, effectively reduce the air passage in the cooperation structure of both, can increase the pressure to better compression arc diameter.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically to an arc-extinguishing chamber flame extinguishing structure and arc-extinguishing device. Background Technology

[0002] One existing arc-extinguishing chamber flame extinguishing structure involves installing a flame extinguishing plate on the upper end of an arc-extinguishing chamber partition (the partition is installed at the top of the arc-extinguishing chamber, and several spaced partition ribs are arranged within the partition). Several ventilation holes are opened on the flame extinguishing plate. The arc extinguishing effect is improved through the cooperation between the arc-extinguishing chamber partition and the flame extinguishing plate. However, due to the limitations of the cooperation structure, the arc diameter compression effect is not good. This defect is even more prominent when it is applied to the UL standard (closed-circuit voltage of 1500V and rated current of 1600A). Therefore, the existing arc-extinguishing chamber flame extinguishing structure needs further improvement. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an arc-extinguishing chamber flame extinguishing structure, in which the flame extinguishing plate is close to the first partition ribs in the arc-extinguishing chamber partition, effectively reducing the ventilation channel in the combined structure and increasing the pressure to better compress the arc diameter.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: An arc-extinguishing chamber flame extinguishing structure includes flame extinguishing plates with several ventilation holes and an arc-extinguishing chamber partition installed on the top of the arc-extinguishing chamber. The arc-extinguishing chamber partition has several first partition ribs that are spaced apart from each other and correspond to the top of the arc-extinguishing grid plate group installed in the arc-extinguishing chamber. The flame extinguishing plates are configured to be close to the upper end of each first partition rib.

[0005] Furthermore, the flame extinguishing plate includes a front section and a rear section. The front section is a closed structure without openings, and each vent is opened on the rear section. The front section of the flame extinguishing plate is configured to correspond to the top front part of the arc extinguishing grid plate assembly.

[0006] Furthermore, the extension range of the front section is configured to cover at least the top positions of the first three arc-extinguishing grids in the arc-extinguishing grid group.

[0007] Furthermore, the extension range of the front section is configured to cover the top positions of the first 3 to 8 arc-extinguishing grids in the arc-extinguishing grid group.

[0008] Furthermore, the arc-extinguishing grid assembly is configured to consist of at least a number of arc-extinguishing grids arranged at intervals in the front-back direction inside the arc-extinguishing chamber. The upper ends of each arc-extinguishing grid are arranged at equal or substantially equal intervals. Each first partition rib is arranged at intervals in the front-back direction in the partition of the arc-extinguishing chamber, and the spacing between each adjacent first partition rib is configured to correspond to the spacing between the top ends of 2 to 3 arc-extinguishing grids.

[0009] Furthermore, the flame extinguishing plate is configured to be in close contact with the upper end of each of the first partition ribs in the arc extinguishing chamber partition, or to form a certain assembly gap with the upper end of each of the first partition ribs, and the size of the assembly gap is configured such that the arc in the interval area between adjacent first partition ribs will not form a short circuit at the assembly gap during the rising process.

[0010] Furthermore, an upper partition is provided at the upper end of the flame extinguishing plate. The upper partition has several second partition ribs arranged at intervals along the front-back direction, and the lower end of each second partition rib is tilted forward toward the side closer to the stationary contact.

[0011] Furthermore, each of the first diaphragm ribs is vertically arranged in the diaphragm of the arc-extinguishing chamber and is equidistantly spaced along the front-to-back direction.

[0012] Furthermore, an anti-freezing net and an arc-extinguishing cover are also provided at the upper end of the upper partition.

[0013] Based on the same inventive concept, this utility model also provides an arc extinguishing device, including an arc extinguishing chamber and the above-mentioned arc extinguishing chamber flame extinguishing structure. The arc extinguishing chamber includes an arc extinguishing grid plate assembly, two arc-blocking plates, and two gas-generating plates. The two arc-blocking plates are arranged opposite each other on the left and right sides. The two gas-generating plates are respectively connected to the lower inner side of the two arc-blocking plates. The arc extinguishing grid plate assembly is installed in the space between the two arc-blocking plates, and the lower end of each arc extinguishing grid plate of the arc extinguishing grid plate assembly is connected to the two gas-generating plates. The two sides of each arc extinguishing grid plate of the arc extinguishing grid plate assembly are respectively connected to the two arc-blocking plates. The arc extinguishing chamber partition is fixedly installed between the upper ends of the two arc-blocking plates.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the arc extinguishing chamber flame extinguishing structure and arc extinguishing device described in this utility model, by attaching the flame extinguishing plate close to the first partition ribs in the arc extinguishing chamber partition, the ventilation channel between the two structures can be effectively reduced, thereby increasing the air pressure when the airflow passes through, so as to better compress the arc diameter and improve the arc extinguishing effect. Attached Figure Description

[0016] Figure 1 This is an exploded three-dimensional structural diagram of the arc-extinguishing device according to an embodiment of the present invention.

[0017] Figure 2 This is a structural cross-sectional view of the arc-extinguishing device according to an embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of the assembly structure of the arc extinguishing device according to an embodiment of this utility model.

[0019] Label Explanation:

[0020] 1. Flame extinguishing plate, 2. Arc extinguishing chamber partition, 3. Arc extinguishing grid, 4. Upper partition, 5. Stationary contact, 6. Anti-free mesh, 7. Arc extinguishing cover, 8. Arc isolation plate, 9. Gas generation partition, 11. Vent hole, 12. Front section, 13. Rear section, 21. First partition rib, 41. Second partition rib. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Please refer to the appendix. Figure 1 To be continued Figure 3 One embodiment of this utility model provides an arc-extinguishing chamber flame extinguishing structure, applied in switchgear structures such as disconnect switches or frame circuit breakers. It includes flame extinguishing plates 1 with several ventilation holes 11 and an arc-extinguishing chamber partition 2 installed on the top of the arc-extinguishing chamber. The partition 2 has several first partition ribs 21 spaced apart from each other and corresponding to the top of the arc-extinguishing grid plate group installed inside the arc-extinguishing chamber. The flame extinguishing plates 1 are configured to be close to each of the first partition ribs 21 (the close arrangement described in this application is not strictly limited to being tightly attached; the close arrangement can be tightly attached without gaps, or it can have a certain gap within the technical requirements for preventing arc short circuits). In this embodiment, by placing the flame extinguishing plates 1 close to each of the first partition ribs 21 in the partition 2, the ventilation channels between the two structures can be effectively reduced, thereby increasing the air pressure when airflow passes through, so as to better compress the arc diameter and improve the arc extinguishing effect.

[0024] Please refer to the appendix. Figure 1 To be continued Figure 3In one preferred embodiment, the flame extinguishing plate 1 includes a front section 12 and a rear section 13. The front section 12 is a closed structure without openings, and each vent hole 11 is formed on the rear section 13. The front section 12 of the flame extinguishing plate 1 is configured to correspond to the front top edge of the arc extinguishing grid plate group. In this embodiment, preferably, the extension range of the front section 12 is configured to cover at least the top edge positions of the first three arc extinguishing grid plates 3 in the arc extinguishing grid plate group. More preferably, the extension range of the front section 12 is configured to cover the top edge positions of the first three to eight arc extinguishing grid plates 3 in the arc extinguishing grid plate group. In this embodiment, since no vent structure is formed at the position of the front section 12 of the flame extinguishing plate 1, and the front section covers the front top edge of the arc extinguishing grid plate group, it can achieve a venting effect during the arc ignition stage, which can increase the internal pressure of the space, thereby compressing the arc diameter and improving the arc extinguishing effect.

[0025] Please refer to the appendix. Figure 1 To be continued Figure 3 In one preferred embodiment, the arc-extinguishing grid assembly is configured to consist of at least a plurality of arc-extinguishing grids 3 arranged at intervals along the front-back direction inside the arc-extinguishing chamber. The upper ends of each arc-extinguishing grid 3 are arranged in an alternating high-low configuration, and the upper ends of each arc-extinguishing grid 3 are arranged at equal or substantially equal intervals. Each first partition rib 21 is arranged at intervals along the front-back direction in the arc-extinguishing chamber partition 2. More preferably, each first partition rib 21 is vertically arranged in the arc-extinguishing chamber partition 2 and is arranged at equal intervals along the front-back direction. The spacing between each adjacent first partition rib 21 is configured to correspond to the spacing between the top ends of 2 to 3 arc-extinguishing grids 3. In this embodiment, because the upper ends of the arc-extinguishing grids 3 are arranged in an alternating high-low configuration, both ventilation effect and the problem of arc short circuits are improved to a certain extent.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 3 In one preferred embodiment, the flame extinguishing plate 1 is configured to be in close contact with the upper end of each of the first partition ribs 21 in the arc extinguishing chamber partition 2, or to form a certain assembly gap with the upper end of each of the first partition ribs 21, and the size of the assembly gap is configured such that the electric arc in the interval area between adjacent first partition ribs 21 will not form a short circuit at the assembly gap during the rising process.

[0027] Please refer to the appendix. Figure 1 To be continued Figure 3In one preferred embodiment, an upper partition 4 is provided at the upper end of the flame extinguishing plate 1. An ionizing mesh 6 and an arc-extinguishing cover 7 are also provided at the upper end of the upper partition 4. The upper partition 4 contains several second partition ribs 41 arranged at intervals along the front-back direction, with the lower ends of each second partition rib 41 tilted forward towards the stationary contact 5. In this embodiment, by providing the upper partition 4, and with the ionizing mesh 6 and arc-extinguishing cover 7 at the upper end of the upper partition 4, the ionizing mesh 6 and arc-extinguishing cover 7, in conjunction with the upper partition 4, can to a certain extent achieve a blocking effect. Thus, a relatively large space is formed inside the upper partition 4, allowing the gas blown out of the arc-extinguishing chamber to flow into this space instead of being directly discharged from the ionizing mesh. In addition, because the voltage of the UL standard is higher, the arc distance generated is longer. In order to meet the requirements of the arc distance, an upper partition is added. On the one hand, it absorbs the metal particles and free arc generated by the arc. On the other hand, because the lower end of each second partition rib 41 is tilted forward towards the side closer to the stationary contact 5, the exhaust direction of the upper partition is away from the front end of the product, preventing the circuit of the control circuit from being burned.

[0028] Please refer to the appendix. Figure 1 To be continued Figure 3 An embodiment of this utility model also provides an arc extinguishing device, including an arc extinguishing chamber and the aforementioned arc extinguishing chamber flame extinguishing structure. The arc extinguishing chamber includes an arc extinguishing grid plate assembly, two arc-isolating plates 8, and two gas-generating baffles 9. The two arc-isolating plates 8 are arranged relatively apart from each other on the left and right sides. The two gas-generating baffles 9 are respectively connected to the lower inner side of the two arc-isolating plates 8. The arc extinguishing grid plate assembly is installed in the space between the two arc-isolating plates 8, and the lower end of each arc-extinguishing grid plate 3 of the arc extinguishing grid plate assembly is connected to the two gas-generating baffles 9. The two sides of each arc-extinguishing grid plate 3 of the arc extinguishing grid plate assembly are respectively connected to the two arc-isolating plates 8. The arc extinguishing chamber baffle 2 is fixedly installed between the upper ends of the two arc-isolating plates 8.

[0029] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A flame extinguishing structure for an arc-extinguishing chamber, characterized in that: It includes a flame extinguishing plate (1) with several ventilation holes (11) and an arc extinguishing chamber partition (2) installed on the top of the arc extinguishing chamber. The arc extinguishing chamber partition (2) has several first partition ribs (21) that are spaced apart from each other and correspond to the top of the arc extinguishing grid plate group installed in the arc extinguishing chamber. The flame extinguishing plate (1) is configured to be close to the upper end of each first partition rib (21).

2. The arc-extinguishing chamber flame extinguishing structure according to claim 1, characterized in that: The flame extinguishing plate (1) includes a front section (12) and a rear section (13). The front section (12) is a closed structure without openings, and each vent (11) is opened on the rear section (13). The front section (12) of the flame extinguishing plate (1) is configured to correspond to the front top of the arc extinguishing grid plate assembly.

3. The arc-extinguishing chamber flame extinguishing structure according to claim 2, characterized in that: The extension range of the front section (12) is configured to cover at least the top positions of the first 3 arc-extinguishing grids (3) in the arc-extinguishing grid group.

4. The arc-extinguishing chamber flame extinguishing structure according to claim 3, characterized in that: The extension range of the front section (12) is configured to cover the top positions of the first 3 to 8 arc-extinguishing grids (3) in the arc-extinguishing grid group.

5. The arc-extinguishing chamber flame extinguishing structure according to claim 1, characterized in that: The arc-extinguishing grid assembly is configured to consist of at least a number of arc-extinguishing grids (3) arranged at intervals in the front-back direction inside the arc-extinguishing chamber. The upper ends of each arc-extinguishing grid (3) are arranged at equal or basically equal intervals. Each first partition rib (21) is arranged at intervals in the front-back direction in the arc-extinguishing chamber partition (2), and the spacing between each adjacent first partition rib (21) is configured to correspond to the spacing between the top ends of 2 to 3 arc-extinguishing grids (3).

6. The arc-extinguishing chamber flame extinguishing structure according to claim 1, characterized in that: The flame extinguishing plate (1) is configured to be in close contact with the upper end of each first partition rib (21) in the arc extinguishing chamber partition (2), or to form a certain assembly gap with the upper end of each first partition rib (21), and the size of the assembly gap is configured such that the electric arc in the interval area between adjacent first partition ribs (21) will not form a short circuit at the assembly gap during the rising process.

7. The arc-extinguishing chamber flame extinguishing structure according to any one of claims 1 to 6, characterized in that: An upper partition (4) is provided at the upper end of the flame extinguishing plate (1). The upper partition (4) is provided with several second partition ribs (41) arranged at intervals along the front and back direction, and the lower end of each second partition rib (41) is tilted forward toward the side closer to the stationary contact (5).

8. The arc-extinguishing chamber flame extinguishing structure according to claim 7, characterized in that: Each first partition rib (21) is vertically arranged in the arc-extinguishing chamber partition (2) and is equidistantly spaced along the front-to-back direction.

9. The arc-extinguishing chamber flame extinguishing structure according to claim 7, characterized in that: An anti-free net (6) and an arc-extinguishing cover (7) are also provided at the upper end of the upper partition (4).

10. An arc-extinguishing device, characterized in that: The invention includes an arc-extinguishing chamber and an arc-extinguishing chamber flame extinguishing structure as described in any one of claims 1 to 9. The arc-extinguishing chamber includes an arc-extinguishing grid plate group, two arc-blocking plates (8) and two gas-generating baffles (9). The two arc-blocking plates (8) are arranged opposite each other on the left and right sides. The two gas-generating baffles (9) are respectively connected to the lower inner side of the two arc-blocking plates (8). The arc-extinguishing grid plate group is installed in the space between the two arc-blocking plates (8) and the lower end of each arc-extinguishing grid plate (3) of the arc-extinguishing grid plate group is connected to the two gas-generating baffles (9). The two sides of each arc-extinguishing grid plate (3) of the arc-extinguishing grid plate group are respectively connected to the two arc-blocking plates (8). The arc-extinguishing chamber baffle (2) is fixedly installed between the upper ends of the two arc-blocking plates (8).

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