A switchgear cabinet

Abstract

This utility model relates to the field of switchgear, specifically to a switch cabinet. This switch cabinet addresses the problem that the layout of components in existing switch cabinets tends to result in a high overall cabinet height. The switch cabinet includes a cabinet body, on which busbar bushings and outgoing line bushings are installed. A vertically arranged three-position switch is installed inside the cabinet. The closing, intermediate, and grounding contacts of the three-position switch are spaced apart from top to bottom. The busbar bushing is connected to the closing contact. The circuit breaker pole and outgoing line bushing are located on the side of the three-position switch, sharing the vertical space of the switch. The circuit breaker pole is connected to the intermediate contact, and the outgoing line bushing is connected to the circuit breaker pole. The vertically arranged moving contact has no cantilever end, avoiding deformation and ensuring reliable position switching. The shared vertical space of the circuit breaker pole and outgoing line bushing allows for a compact layout of components, reducing the overall cabinet height.

Description

Technical Field

[0001] This utility model relates to the field of switchgear, specifically to a switch cabinet. Background Technology

[0002] Existing switchgear typically houses a three-position switch and a circuit breaker pole. For example, Chinese invention patent CN113783134A discloses a three-phase common-cylinder gas-insulated metal-enclosed switchgear. This switchgear includes a cabinet with an inlet bushing at the top and an outlet bushing at the bottom. Inside the cabinet are horizontally placed three-position switches and circuit breaker poles. The three-position switch includes a grounding contact, an intermediate contact, and a closing contact arranged horizontally at intervals, as well as a moving contact that moves horizontally to switch the three-position switch. The three-position switch is located below the inlet bushing, which is connected to the closing contact. The circuit breaker pole is located below the three-position switch and connected to the intermediate contact. The outlet bushing is located below the circuit breaker pole, and the two are interconnected. Since the components are arranged vertically, a certain amount of height must be reserved within the cabinet for installation, increasing the cabinet's overall height. Meanwhile, the moving contact is arranged horizontally, which will cause the cantilever end to sink under the action of gravity. Over time, this will cause deformation of the moving contact, which will make it difficult to align the isolating contact and grounding contact with the moving contact, making it difficult to guarantee the reliability of the three-position switch switching position. Utility Model Content

[0003] The purpose of this utility model is to provide a switch cabinet that solves the problem that the layout of the components in existing switch cabinets tends to make the overall height of the cabinet too high.

[0004] To solve the above-mentioned technical problems, the present invention provides a switch cabinet including a cabinet body, on which busbar bushings and outgoing bushings are installed. A vertically arranged three-position switch is installed inside the cabinet body. The closing contact, intermediate contact, and grounding contact of the three-position switch are spaced apart from top to bottom. The moving contact moves in the vertical direction to switch the position of the three-position switch. The busbar bushing is connected to the closing contact. The circuit breaker pole and the outgoing bushing are located on the side of the three-position switch and share the space in the height direction of the three-position switch. The circuit breaker pole is connected to the intermediate contact, and the outgoing bushing is connected to the circuit breaker pole.

[0005] Furthermore, the bus bushing is located on the side of the closing contact seat, and the top of the closing contact seat is at the same height as the bottom of the bus bushing; or the top of the closing contact seat is higher than the bottom of the bus bushing.

[0006] Furthermore, the arrangement direction of the circuit breaker poles is consistent with the arrangement direction of the bus bushings.

[0007] Furthermore, a supporting insulator for installing the closing contact seat is provided on the side wall of the cabinet, and the supporting insulator is located on the side wall of the three-position switch away from the bus bushing.

[0008] Furthermore, the bus bushing is located on the top wall of the cabinet, corresponding to the position above the closing contact seat, and the closing contact seat is installed on the bus bushing to directly connect the two.

[0009] Furthermore, the busbar bushing is installed on the side wall of the cabinet at the same height as the closing contact seat, and the closing contact seat is installed on the busbar bushing to directly connect the two.

[0010] Furthermore, the circuit breaker pole corresponds to the intermediate contact in the height direction and is connected to the intermediate contact through its end.

[0011] Furthermore, the outgoing bushing is located on the side of the grounding contact, and the two share the space in the height direction of the cabinet.

[0012] Furthermore, a grounding conductor is also connected between the grounding contact and the bottom wall of the cabinet.

[0013] Furthermore, the moving contact is driven to move up and down by a lead screw and nut mechanism. The lead screw passes through the middle of the grounding contact seat and is rotatably mounted on the bottom of the cabinet.

[0014] This utility model proposes a modified element-type technical solution. The core concept of this utility model is to adjust the positions of various components within the cabinet. Specifically, the closing contact, intermediate contact, and grounding contact of the three-position switch are arranged at intervals from top to bottom within the cabinet. Correspondingly, the moving contact is also arranged vertically. The circuit breaker pole and outgoing bushing are located on the side of the three-position switch, sharing the space along the height of the three-position switch. The vertical arrangement of the moving contact eliminates the cantilever end, preventing deformation and ensuring reliable switching. Simultaneously, the shared space along the height of the three-position switch by the circuit breaker pole and outgoing bushing results in a more compact layout of components within the switch cabinet, reducing the overall height of the cabinet. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of a switch cabinet according to the present invention;

[0016] Figure 2 A schematic diagram of a three-position switch in the closed position;

[0017] Figure 3 A schematic diagram of a three-position switch in the open position;

[0018] Figure 4 This is a schematic diagram of a three-position switch in the contact position.

[0019] In the diagram: 1. Supporting insulator; 2. Closing contact seat; 3. Moving contact; 4. Intermediate contact seat; 5. Lead screw; 6. Grounding contact seat; 7. Circuit breaker pole; 8. Closing channel; 9. Busbar bushing; 10. Cabinet; 11. Outgoing bushing; 12. Grounding conductor. Detailed Implementation

[0020] This utility model proposes an improved technical solution to address the aforementioned technical problems. The core concept of this utility model is to adjust the positions of the components within the cabinet. Specifically, the closing contact, intermediate contact, and grounding contact of the three-position switch are arranged at intervals from top to bottom within the cabinet. Correspondingly, the moving contact is also arranged vertically. The circuit breaker pole and outgoing bushing are positioned on the side of the three-position switch, sharing the space along the height of the three-position switch. The vertical arrangement of the moving contact eliminates the cantilever end, preventing deformation and ensuring reliable switching. Simultaneously, the shared space along the height of the three-position switch by the circuit breaker pole and outgoing bushing results in a more compact layout of the components within the switch cabinet, reducing the overall height of the cabinet.

[0021] Based on the above concept, a switch cabinet of this utility model includes as follows: Figure 1 The cabinet 10 shown has a busbar bushing 9 and an outgoing bushing 11. A vertically arranged three-position switch is installed inside the cabinet 10. The closing contact 2, intermediate contact 4, and grounding contact 6 of the three-position switch are spaced apart from top to bottom. The grounding contact 6 is installed on the bottom wall of the cabinet 10. The moving contact 3 moves up and down to switch the position of the three-position switch. Figure 2 As shown, when the moving contact 3 moves to the position where the closing contact 2 and the intermediate contact 4 are connected, the three-position switch is in the closed position; Figure 3 As shown, when the moving contact 3 moves to the point where it is disconnected from both the closing contact 2 and the grounding contact 6, the three-position switch is in the open position; Figure 4 As shown, when the moving contact 3 moves to the conducting intermediate contact 4 and grounding contact 6, the three-position switch is in the grounded position. The bus bushing 9 is connected to the closing contact 2. The circuit breaker pole 7 and the outgoing bushing 11 are located on the side of the three-position switch, and the circuit breaker pole 7 and the outgoing bushing 11 share the space in the height direction of the three-position switch. The circuit breaker pole 7 is connected to the intermediate contact 4, and the outgoing bushing 11 is connected to the circuit breaker pole 7. When the three-position switch is arranged vertically, its moving contact 3 is also arranged vertically, that is, the moving contact 3 does not have a cantilever end, which avoids deformation of the moving contact 3 and ensures the reliability of the position switching of the moving contact 3. At the same time, the circuit breaker pole 7 and the outgoing bushing share the space in the height direction of the three-position switch, which makes the layout of the components in the switch cabinet more compact and can reduce the overall height of the cabinet 10.

[0022] like Figure 1 As shown, the bus bushing 9 is located on the side of the closing contact 2, and the top of the closing contact 2 is at the same height as the bottom of the bus bushing 9. The bus bushing 9 is connected to the closing contact 2 via a connecting busbar. This layout reduces the length of the connecting busbar between the bus bushing 9 and the closing contact 2, thus lowering manufacturing costs. Simultaneously, it also facilitates reducing the space required for the bus bushing 9 and the three-position switch to be arranged in the vertical direction, further achieving a compact layout of the components within the switchgear and further reducing the height of the cabinet 10.

[0023] The circuit breaker poles 7 are arranged in the same direction as the busbar bushings 9. In this way, both occupy the space on the same side of the cabinet 10, achieving a compact layout of all components.

[0024] A supporting insulator 1 for installing the closing contact 2 is provided on the side wall of the cabinet 10, and the supporting insulator 1 is located on the side wall of the three-position switch away from the bus bushing 9. This side wall is closer to the three-position switch, so the supporting insulator does not need to extend too far to achieve the installation of the closing contact 2.

[0025] like Figure 1 As shown, the circuit breaker pole 7 corresponds to the intermediate contact 4 in the height direction and is connected to the intermediate contact 4 through its end. In this way, while ensuring the reliability of the installation of the intermediate contact 4, the distance between the intermediate contact 4 and the circuit breaker pole 7 in the horizontal direction can also be reduced, making the layout of the components in the switch cabinet more compact.

[0026] The outgoing bushing 11 is located on the side of the grounding contact 6, and the two share the space in the height direction of the cabinet 10. For example... Figure 1 As shown, the outgoing bushing 11 is located on the bottom wall of the cabinet 10, corresponding to the lower side of the circuit breaker pole 7. The circuit breaker pole 7 is connected to the outgoing bushing 11 through its lower outgoing side. In this way, the layout of the three-position switch, the circuit breaker pole 7, and the outgoing bushing 11 is compact, further saving the space occupied by each component in the cabinet and facilitating the miniaturization of the cabinet.

[0027] A grounding conductor 12 is also connected between the grounding contact 6 and the cabinet 10. This ensures the reliability of the grounding of the grounding contact 6.

[0028] like Figure 1-4 As shown, the moving contact 3 is driven to move up and down by a screw and nut mechanism. The screw (5) passes through the middle of the grounding contact (6) and is rotatably mounted on the bottom of the cabinet (10). Specifically, as shown... Figure 1-4As shown, the closing contact 2, intermediate contact 4, and grounding contact 6 are all linear seats. The closing contact 2 and grounding contact 6 are respectively provided with a closing channel 8 and a grounding channel through which the moving contact 3 can pass. The intermediate contact 4 is provided with a through channel running vertically through which the moving contact 3 can pass. The closing channel 8, grounding channel, and through channel are coaxially arranged, and each contains a contact finger for conductive contact with the moving contact 3. The screw 5 rotates forward and reverse to drive the moving contact 3 to move up and down, thereby realizing the switching of the three-position switch. The screw-nut mechanism has a simple structure, reliable transmission, and can reliably cooperate with the moving contact 3 to realize the switching of the three-position switch.

[0029] Regarding the installation position of the busbar bushing, this utility model also provides other embodiments. In one embodiment, the bottom of the busbar bushing installed on the side of the closing contact can be lower than the top of the closing contact, so as to further achieve the compactness of the busbar bushing and the three-position switch in the height direction. In another embodiment, the busbar bushing can be located on the top wall of the cabinet corresponding to the position above the closing contact, in which case the closing contact can be directly installed on the busbar bushing to directly realize the connection between the two. Of course, in another embodiment, the busbar bushing can also be installed on the side wall of the cabinet at the same height as the closing contact, and the closing contact is installed on the busbar bushing to directly realize the connection between the two.

[0030] Regarding the installation position of the circuit breaker pole, this utility model also provides other embodiments. In another embodiment, the circuit breaker pole can also be installed in the cabinet at the position corresponding to the upper and lower parts of the closing contact seat. In this case, the intermediate contact seat can be installed on the cabinet by supporting insulators. The circuit breaker pole and the intermediate contact seat are connected by connecting busbars. It is only necessary to ensure that the circuit breaker pole is located on the side of the three-position switch and shares the space in the height direction.

[0031] Regarding the layout of the circuit breaker poles and busbar bushings, this utility model also provides other embodiments. In another embodiment, the extension direction of the circuit breaker poles and the arrangement direction of the busbar bushings can also be staggered at a certain angle.

[0032] Regarding the location of the outgoing sleeve, this utility model also provides other embodiments. In another embodiment, the outgoing sleeve can be located on the upper part of the side wall of the cabinet corresponding to the grounding contact, as long as its outgoing line is reliable.

[0033] Regarding the driving mechanism of the moving contact, this utility model also provides other embodiments. In another embodiment, a rack is installed on the outer side of the moving contact, and the driving mechanism includes a gear located on the side of the moving contact. The gear and the rack cooperate with each other to realize the up and down movement of the moving contact.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A switch cabinet, characterized in that: The system includes a cabinet, on which busbar bushings and outgoing bushings are installed. Inside the cabinet, a vertically arranged three-position switch is installed. The closing contact, intermediate contact, and grounding contact of the three-position switch are spaced apart from top to bottom. The moving contact moves in the vertical direction to switch the position of the three-position switch. The busbar bushing is connected to the closing contact. The circuit breaker pole and the outgoing bushing are located on the side of the three-position switch and share the space in the height direction of the three-position switch. The circuit breaker pole is connected to the intermediate contact, and the outgoing bushing is connected to the circuit breaker pole.

2. The switchgear according to claim 1, characterized in that: The bus bushing is located on the side of the closing contact seat, and the top of the closing contact seat is at the same height as the bottom of the bus bushing; or the top of the closing contact seat is higher than the bottom of the bus bushing.

3. The switchgear according to claim 2, characterized in that: The arrangement direction of the circuit breaker poles is consistent with the arrangement direction of the bus bushings.

4. The switchgear according to claim 3, characterized in that: The cabinet side wall is equipped with a support insulator for installing the closing contact seat, and the support insulator is located on the side wall of the three-position switch away from the bus bushing.

5. The switchgear according to claim 1, characterized in that: The busbar bushing is located on the top wall of the cabinet, corresponding to the position above the closing contact seat. The closing contact seat is installed on the busbar bushing to directly connect the two.

6. The switchgear according to claim 1, characterized in that: The busbar bushing is installed on the side wall of the cabinet at the same height as the closing contact seat, and the closing contact seat is installed on the busbar bushing to directly connect the two.

7. The switchgear according to any one of claims 1-6, characterized in that: The circuit breaker pole corresponds to the intermediate contact in the height direction and is connected to the intermediate contact through its end.

8. The switchgear according to any one of claims 1-6, characterized in that: The outgoing bushing is located on the side of the grounding contact, and the two share the space in the height direction of the cabinet.

9. The switchgear according to any one of claims 1-6, characterized in that: A grounding conductor is also connected between the grounding contact and the bottom wall of the cabinet.

10. The switchgear according to any one of claims 1-6, characterized in that: The moving contact is driven to move up and down by a lead screw and nut mechanism. The lead screw passes through the middle of the grounding contact seat and is rotatably installed at the bottom of the cabinet.

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