Supporting piece for vacuum arc-extinguishing chamber, circuit breaker and gas insulation switch cabinet

Abstract

The utility model provides a support member used for a vacuum arc-extinguishing chamber, a circuit breaker and a gas insulation switch cabinet. The support member comprises a left housing; the right shell is arranged opposite to the left shell, and a gap is formed between the left shell and the right shell; the left shell and the right shell are both connected to the top shell, the left shell, the right shell and the top shell are integrally formed, the left shell, the right shell and the top shell surround to form a containing cavity, and the containing cavity is used for containing one vacuum arc-extinguishing chamber. The left shell, the right shell and the top shell which are integrally formed are arranged, the containing cavity formed by the left shell, the right shell and the top shell in a surrounding mode can only contain one vacuum arc-extinguishing chamber, the independent supporting piece can be prevented from being affected by deformation of other supporting pieces, and the performance of the vacuum arc-extinguishing chamber is better when the vacuum arc-extinguishing chamber works.

Description

Technical Field

[0001] The utility model relates to the field of switch cabinets, in particular to a support member, a circuit breaker and a gas-insulated switch cabinet for a vacuum interrupter. Background Art

[0002] Gas Insulated Switchgear (GIS) includes ring network feeder cabinet, circuit breaker cabinet, etc. Among them, the circuit breaker cabinet includes a vacuum interrupter in the gas box and a three-position switch and related operating mechanisms.

[0003] In practical applications, the vacuum interrupter needs to be provided with corresponding supports to fix its position. Utility Model Content

[0004] In view of this, the utility model proposes a support member for a vacuum interrupter, comprising:

[0005] left housing;

[0006] A right shell, which is arranged opposite to the left shell, and there is a gap between the left shell and the right shell;

[0007] The top shell, the left shell and the right shell are both connected to the top shell, and the left shell, the right shell and the top shell are integrally formed, and the left shell, the right shell and the top shell are surrounded to form a accommodating cavity, and the accommodating cavity is used to accommodate a vacuum arc extinguishing chamber.

[0008] By providing an integrally formed left shell, right shell and top shell, and making the accommodation cavity formed by the three surround only one vacuum arc extinguishing chamber, such an independent support member can avoid being affected by the deformation of other support members, so that the vacuum arc extinguishing chamber has better performance during operation.

[0009] According to the support member as described above, optionally, it further comprises: an arc rib located at the top of at least one of the left shell and the right shell, and the arc ribs extend from the top shell to the bottom of the support member and the thickness gradually decreases. The arc ribs are used to strengthen the strength of the support member and play the role of reinforcing ribs to avoid fracture during movement in the vacuum interrupter.

[0010] According to the support member as described above, optionally, it further comprises: a first reinforcing rib connected to the left shell and the right shell, which can enhance the strength of the support member.

[0011] According to the support member as described above, optionally, it further comprises: a second reinforcing rib, which is arranged on at least one of the left housing and the right housing, and the second reinforcing rib is perpendicular to the arc rib. The second reinforcing rib can not only reduce the shrinkage deformation caused by the molding process, but also make the left housing and the right housing form a unified whole, reduce the deformation caused by the electric force, that is, reduce the internal stress of the parts.

[0012] According to the support member as described above, optionally, it further comprises: an arc-shaped isolation plate, which is arranged between the left shell and the right shell, and the arc-shaped isolation plate is used to surround the moving end outlet seat of the vacuum interrupter, and plays an isolation role, so as to avoid discharge between two adjacent moving end outlet seats.

[0013] According to the support member as described above, optionally, the top shell is provided with a through hole and two metal inserts, and the metal inserts are located on the inner side of the top shell. Such a structure can minimize the reduction of the strength of the top shell.

[0014] According to the support member as described above, optionally, it further comprises: a limiting plate, which is clamped at two grooves on the inner walls of the left shell and the right shell, and the two grooves are arranged opposite to each other. The limiting plate is used to limit the vacuum interrupter.

[0015] According to the support member as described above, optionally, the support member is an independent structure.

[0016] The utility model also provides a circuit breaker, comprising:

[0017] 3 vacuum interrupters;

[0018] According to any one of the above support members for vacuum interrupter chambers, each of the vacuum interrupter chambers is located in one of the support members.

[0019] According to the circuit breaker as described above, optionally, it further comprises: a frame, and the three support members are arranged in parallel on the frame.

[0020] The utility model further provides a gas-insulated switch cabinet, which is a support member for a vacuum interrupter as described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art will be more aware of the above and other features and advantages of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a structural schematic diagram of a support member for a vacuum arc extinguishing chamber from one perspective according to an embodiment of the utility model.

[0023] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective.

[0024] Figure 3 It is a structural schematic diagram of a vacuum arc extinguishing chamber arranged on a frame.

[0025] Figure 4 This is a partial structural diagram of a circuit breaker.

[0026] The reference numerals are as follows:

[0027] 11-Interrupter housing

[0028] 12-Contact rod

[0029] 13-Soft conductor of the moving end outlet seat

[0030] 2-Support

[0031] 21-Left housing

[0032] 22-Right housing

[0033] 23-Top shell

[0034] 231-Through hole

[0035] 232-Metal Insert

[0036] 241-First Gap

[0037] 242-Second gap

[0038] 25-Curved ribs

[0039] 261-First reinforcement rib

[0040] 262-Second reinforcement

[0041] 271-Curved Isolation Board

[0042] 272-Limiting plate

[0043] 2721-Ring protrusion

[0044] 273-Through hole

[0045] 28-Groove

[0046] 3- Framework

[0047] 41-Upper copper bar

[0048] 42-Lower copper bar DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail with reference to the following embodiments. The nouns and pronouns related to people in this patent application are not limited to specific genders.

[0050] The utility model provides a support member for a vacuum arc extinguishing chamber. Figure 3 As shown, the vacuum interrupter includes an interrupter housing 11, a stationary contact and a moving contact located in the interrupter housing 11, and the moving contact can move to contact or separate with the stationary contact under the drive of the operating mechanism. Both the stationary contact and the moving contact include a contact sheet and a contact rod. Figure 3 The figure shows the contact rod 12 corresponding to the static contact, and the upper copper bar is connected to it. In order to keep the vacuum interrupter in a fixed position, a support 2 is required. During the operation of the vacuum interrupter, the contact requires pressure to maintain the normal operation of the vacuum interrupter. For example, the moving contact below needs to move upward to contact the static contact. At this time, the static contact above will be subjected to a certain pressure, which will also be transmitted to the support 2. Such force is called "deformation force" in the utility model. Figure 3 As shown, in the present invention, the moving contact of the vacuum interrupter corresponds to a moving end outlet seat, on which a soft conductor 13 is arranged, and an external lower copper busbar is connected to the soft conductor 13 .

[0051] like Figure 1 and Figure 2 As shown, the support member 2 for the vacuum interrupter comprises a left shell 21, a right shell 22 and a top shell 23. The left shell 21 and the right shell 22 are arranged opposite to each other, and there is a gap between the left shell 21 and the right shell 22. Figure 1 As shown in FIG. 1 , it is a schematic structural diagram of a support member 2 for a vacuum interrupter at a first angle. Figure 2 FIG. 2 is a schematic diagram of the structure of the support member 2 for the vacuum interrupter at a second angle. Figure 1 and Figure 2 As can be seen from the figure, there is a gap at two angles between the left housing 21 and the right housing 22. Figure 1 The gap in is called the first gap 241. Figure 2 The gap in the first gap 241 is called the second gap 242. The existence of the first gap 241 facilitates the installation of other connecting components on the vacuum interrupter in the accommodation cavity. The existence of the second gap 242 facilitates the placement of the vacuum interrupter in the accommodation cavity.

[0052] The left shell 21 and the right shell 22 are both connected to the top shell 23, and the left shell 21, the right shell 22 and the top shell 23 are integrally formed, and the left shell 21, the right shell 22 and the top shell 23 surround to form a receiving cavity, and the receiving cavity is used to receive a vacuum interrupter. It should be noted that the receiving cavity is not a sealed receiving cavity, that is, there is a gap between the left shell 21 and the right shell 22, so as to facilitate the installation of the vacuum interrupter in the receiving cavity.

[0053] One support member 2 corresponds to one vacuum interrupter, which means that one support member 2 can only accommodate one vacuum interrupter, that is, the support member 2 is an independent structure and has no connection with other support members 2. However, it should be noted that the support member 2 will be fixed to other components later, such as the frame 3 of the circuit breaker, and the independent result only indicates that the support member 2 has no connection with other support members 2.

[0054] The left shell 21, the right shell 22 and the top shell 23 are integrally formed and are not connected to each other by other parts, which not only simplifies the process but also has good stability. As an exemplary illustration, the material of the support member 2 is a thermosetting material, and the support member 2 can be formed by a pressing thermoforming process.

[0055] According to this embodiment, by providing an integrally formed left shell 21, right shell 22 and top shell 23, and making the accommodating cavity formed by the three only accommodate one vacuum arc chamber, such an independent support member 2 can avoid being affected by the deformation of other support members 2, so that the vacuum arc chamber has better performance during operation.

[0056] Optionally, the support member 2 of the present invention further includes an arcuate rib 25, which is located at the top of at least one of the left shell 21 and the right shell 22. The arcuate rib 25 extends from the top shell 23 to the bottom of the support member 2 and the thickness gradually decreases. Figure 1 and Figure 2 The left shell 21 and the right shell 22 are both provided with the arc rib 25. The arc rib 25 is used to strengthen the strength of the support member 2 and acts as a reinforcing rib to prevent breakage during movement in the vacuum interrupter. Figures 1 to 3 As shown, the arc rib 25 extends from the top shell 23 to the bottom of the support member 2, indicating that the height of the rib on the top of the support member 2 is greater, so that the support member 2 can withstand the deformation force applied by the vacuum interrupter during movement at the lowest cost. Figures 1 to 3 Three arc ribs 25 are provided, which can be set according to actual needs.

[0057] Optionally, the support member 2 further includes a first reinforcing rib 261, and the first reinforcing rib 261 is connected to the left shell 21 and the right shell 22. Figure 1It can be seen that the first reinforcing rib 261 divides the first gap 241 into two sections. The first reinforcing rib 261 is in a strip shape, and its purpose is to strengthen the strength of the support member 2 so that the support member 2 can withstand the power of the vacuum interrupter. The first reinforcing rib 261 is located at the first gap 241 of the support member 2. The first reinforcing rib 261 can increase the strength of the support member 2 in the first direction D1 and reduce the deformation caused by the electric force generated between phases in a short circuit fault, that is, reduce the deformation amount to ensure the stability of the system stiffness.

[0058] Optionally, the support member 2 further includes a second reinforcing rib 262, which is disposed on at least one of the left housing 21 and the right housing 22, and is perpendicular to the arc rib 25. The second reinforcing rib 262 can increase the strength of the support member 2 in the second direction D2, and the second reinforcing rib 262 can not only reduce the shrinkage deformation caused during the molding process, but also allow the left housing 21 and the right housing 22 to form a unified whole, thereby reducing the deformation caused by the electric force, that is, reducing the internal stress of the parts.

[0059] Optionally, the support member 2 further includes an arc-shaped isolation plate 271, which is disposed between the left housing 21 and the right housing 22, and is used to surround the moving end outlet seat of the vacuum interrupter. The arc-shaped isolation plate 271 is integrally formed with the left housing 21 and the right housing 22, and plays an isolating role, thereby preventing discharge from occurring between two adjacent moving end outlet seats.

[0060] Optionally, the top shell 23 is provided with a through hole 231 and two metal inserts 232, and the metal inserts 232 are located on the inner side of the top shell 23. The conductive rod of the static contact can be fixed to the top shell 23 through the through hole 231. The two metal inserts 232 are used to fix the upper copper bar 41, and the electrical connection with other components is achieved through the upper copper bar 41. The existence of the metal inserts 232 indicates that the components used to connect the conductive bar do not cause a transparent structure to the top shell 23, so that the reduction of the strength of the top shell 23 can be avoided as much as possible.

[0061] Alternatively, if Figure 4 As shown, the support member 2 further includes a limit plate 272, which is clamped at two grooves 28 on the inner walls of the left housing 21 and the right housing 22, and the two grooves 28 are arranged opposite to each other. The limit plate 272 is used to limit the vacuum interrupter. As an exemplary illustration, an annular protrusion 2721 is provided on the limit plate 272, and the bottom of the interrupter housing 11 of the vacuum interrupter can be located in the annular protrusion 2721.

[0062] The utility model also provides a circuit breaker, which includes three vacuum interrupter chambers and any of the aforementioned supports 2 for the vacuum interrupter chambers, each vacuum interrupter chamber being located in one supporter 2. That is, one vacuum interrupter chamber corresponds to one supporter 2 one by one. In this way, each supporter 2 only needs to be affected by the deformation force brought by one vacuum interrupter chamber, and will not affect each other.

[0063] Optionally, the circuit breaker further comprises a frame 3, and three support members 2 are arranged in parallel on the frame 3. Specifically, a metal insert 232 may be arranged at an appropriate position of the support member 2, such as Figure 1 As shown, the bottom of the support member 2 on the side where the first gap 241 is located has two metal inserts 232, and the metal inserts 232 are used to install the moving end outlet seat, such as Figure 3 As shown in FIG. 1 , it is a schematic diagram of the structure after the moving end outlet seat is installed on the support member 2. Figure 2 As shown, there is a metal insert 232 on the left housing 21 and the right housing 22 on the side where the second gap 242 is located. The metal insert 232 is used to fix one side of the support member 2 on the frame 3. The frame 3 is made of metal material, which can ensure the rigidity of the entire circuit breaker, reduce the bounce and opening synchronization of the vacuum interrupter, and ensure the performance stability of the vacuum interrupter during the closing process. Figure 2 As shown, there are two metal inserts 232 at the bottom of the support member 2, which are used to fix the base of the support member 2.

[0064] Optionally, the support member 2 of the present invention further includes a through hole 273, such as Figure 1 and Figure 2 As shown, the bottom of the support portion has two through holes 273, which are symmetrically arranged. The two through holes 273 are used to reduce the weight of the support member 2. They can also ensure that the support member 2 forms a uniform wall thickness during the thermoforming process, reduce cracking and deformation defects caused by insufficient curing of the product, and also reduce the cost of the product.

[0065] The utility model also includes a gas-insulated switch cabinet, which includes any one of the aforementioned supporting members 2 for a vacuum interrupter.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A support member (2) for a vacuum interrupter, characterized in that: include: Left housing (21); a right housing (22), which is arranged opposite to the left housing (21), and a gap (241, 242) is provided between the left housing (21) and the right housing (22); A top shell (23), the left shell (21) and the right shell (22) are both connected to the top shell (23), and the left shell (21), the right shell (22) and the top shell (23) are integrally formed, and the left shell (21), the right shell (22) and the top shell (23) surround and form a receiving cavity, and the receiving cavity is used to receive a vacuum arc extinguishing chamber.

2. The support member (2) according to claim 1, characterized in that: Also includes: An arc-shaped rib (25) is located at the top of at least one of the left shell (21) and the right shell (22), and the arc-shaped rib (25) extends from the top shell (23) to the bottom of the support member (2) and the height of the arc-shaped rib (25) gradually decreases.

3. The support member (2) according to claim 1, characterized in that: Also includes: A first reinforcing rib (261) is connected to the left shell (21) and the right shell (22).

4. The support member (2) according to claim 2, characterized in that: Also includes: A second reinforcing rib (262) is provided on at least one of the left shell (21) and the right shell (22), wherein the second reinforcing rib (262) is perpendicular to the arc-shaped rib (25).

5. The support member (2) according to claim 1, characterized in that: Also includes: An arc-shaped isolation plate (271) is arranged between the left housing (21) and the right housing (22), and the arc-shaped isolation plate (271) is used to surround the moving end outlet seat of the vacuum interrupter.

6. The support member (2) according to claim 1, characterized in that The top shell (23) is provided with a through hole (231) and two metal inserts (232), and the metal inserts (232) are located on the inner side of the top shell (23).

7. The support member (2) according to claim 1, characterized in that Also includes: The limiting plate (272) is clamped at two grooves (28) on the inner walls of the left shell (21) and the right shell (22), and the two grooves (28) are arranged opposite to each other.

8. The support member (2) according to any one of claims 1 to 7, characterized in that: The support member (2) is an independent structure.

9. A circuit breaker, characterized in that include: 3 vacuum interrupters; According to the support member (2) for a vacuum interrupter according to any one of claims 1 to 8, each of the vacuum interrupters is located in one of the support members (2).

10. The circuit breaker according to claim 9, characterized in that Also includes: A frame (3), wherein the three support members (2) are arranged in parallel on the frame (3).

11. Gas insulated switchgear, characterized in that: A support member (2) for a vacuum interrupter according to any one of claims 1 to 8.

Images