Column type circuit breaker combined structure for box transformer substation
By designing a rotary isolation knife in the combined structure of the column circuit breaker for box change, the closing, isolation and grounding functions are achieved, and the problem that the isolation knife in the prior art cannot achieve the grounding function is solved, saving space and reducing manufacturing costs.
Patent Information
- Application Number
- CN202421008297.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In the existing box, the connection between the isolation knife and the circuit breaker is fixed, and the grounding function cannot be achieved, resulting in the need of an additional grounding knife, which increases space and volume.
A combined structure of a column circuit breaker for box change is designed. The isolation knife is rotatable at one end close to the isolation switch as the rotation center, and can be connected to the first wiring terminal or the ground terminal to realize the functions of closing, isolation and grounding.
Through the rotary connection design, the isolation tool has three functions: closing, isolation and grounding, which reduces the need for space, saves manufacturing costs, and reduces the overall volume of the box-to-high-voltage chamber.
Smart Images
Figure CN222462814U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to a column type circuit breaker combination structure for a box transformer. Background Art
[0002] Circuit breakers are used to close, carry, and interrupt current under normal circuit conditions, and are important components in prefabricated transformers (referred to as box transformers). Currently, in box transformers, the connection end between the isolating knife and the circuit breaker is fixed, and the other end of the isolating knife is open and closed. In the isolated state, the isolating knife is far away from the base. Therefore, conventional isolating knives only have two functions: closing and isolating. Box transformers need to be equipped with grounding knives separately to meet grounding requirements, which inevitably requires more space to accommodate these necessary components and will also increase the overall volume of the high-voltage room of the box transformer. Utility Model Content
[0003] In view of the defects of the above-mentioned prior art, the purpose of the utility model is to provide a column type circuit breaker combination structure for a box transformer, so as to reduce the volume of the high voltage chamber of the box transformer.
[0004] The purpose of the utility model is achieved by the following technical solutions:
[0005] A column-type circuit breaker combination structure for a box-type transformer comprises a column-type circuit breaker, a disconnector and a grounding terminal. The column-type circuit breaker is provided with a first terminal, the disconnector is provided with an isolating knife, the isolating knife can rotate with one end close to the disconnector as a rotation center, the position of the rotation center is fixed, and the other end of the isolating knife can be connected to the first terminal or the grounding terminal when rotating.
[0006] Furthermore, the isolating knife is provided with three working positions, the connection position of the isolating knife and the first connecting terminal is recorded as the closing position, the connection position of the isolating knife and the grounding terminal is recorded as the grounding position, and the position of the isolating knife between the first connecting terminal and the grounding terminal is recorded as the isolating position.
[0007] Furthermore, the isolating switch includes an operating rod, an insulating pull rod, an operating seat and a rotating shaft. The position of the operating seat is fixed, one end of the operating rod is hinged to the operating seat, and the other end is hinged to the insulating pull rod. The top end of the insulating pull rod is hinged to the isolating knife, and the rotating shaft is installed on the operating seat. The operating rod is fixed on the rotating shaft. The operating rod is hinged to the operating seat through the rotating shaft. When in the isolating position, the isolating knife is close to the base.
[0008] Furthermore, the column-type circuit breaker and the isolating switch are in multiple groups, and the rotating shaft is one, and the one rotating shaft simultaneously adjusts multiple isolating switches to make the same rotating action.
[0009] Furthermore, it includes a rotating shaft, which is installed on the support plate, and the isolation knife is fixed on the rotating shaft. One end of the isolation knife is hinged to the support plate through the rotating shaft. When in the isolation position, the isolation knife is close to the base.
[0010] Furthermore, the column-type circuit breaker and the isolating switch are in multiple groups, and there is one rotating shaft, which includes an insulating connecting rod and a metal shaft rod that are connected and spaced apart, and one end of the isolating knife is fixed on the metal shaft rod. One rotating shaft simultaneously adjusts multiple isolating knives to make the same rotational action.
[0011] Furthermore, one end of the rotating shaft is mounted on the supporting plate, and the other end is mounted on the insulating support column.
[0012] Furthermore, the column circuit breaker, the isolating switch and the grounding terminal are installed on the same base.
[0013] Furthermore, it also includes a circuit breaker controller, which is installed at the end or middle of the column circuit breaker; when the circuit breaker controller is installed at one end of the column circuit breaker, the other end of the column circuit breaker is provided with a second terminal, and the first terminal is provided in the middle of the column circuit breaker; when the circuit breaker controller is installed in the middle of the column circuit breaker, the first terminal is provided at one end of the column circuit breaker, and the other end of the column circuit breaker is provided with a second terminal.
[0014] The beneficial effects of the utility model are as follows: the position of one end of the isolating knife is fixed, and the other end is rotatably connected to the first wiring terminal or the grounding terminal, thereby realizing the closing function or the grounding function. Different from the prior art, the end of the isolating knife connected to the column circuit breaker is open and closed. When in the isolation position, the isolating knife is close to the base direction, so it does not affect other insulation distances during isolation, and can be grounded to the first wiring terminal. In this way, the isolating knife has the three functions of closing, isolating and grounding. Compared with the prior art, the utility model does not need to be equipped with a grounding knife, saving manufacturing costs and reducing occupied space. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of the structure of Example 2 in a grounded state;
[0016] Figure 2 is a schematic diagram of the structure of Example 2 in an isolated state;
[0017] Figure 3 is a schematic diagram of the structure of Embodiment 2 in the closed state;
[0018] Figure 4 is a schematic diagram of the overall structure of Example 2;
[0019] Figure 5 is a top view of Example 2;
[0020] Figure 6 is a schematic diagram of the overall structure of Example 3;
[0021] Figure 7 is a side view of Example 3;
[0022] Figure 8 is a top view of Example 3;
[0023] Fig. 9 This is another overall structural schematic diagram of Example 3.
[0024] In the figure: 1. column type circuit breaker; 2. grounding terminal; 3. first wiring terminal; 4. isolating knife; 5. closing position; 6. grounding position; 7. isolating position; 8. base; 9. operating lever; 10. insulating pull rod; 11. operating seat; 12. rotating shaft; 13. rotating handle; 14. insulating connecting rod; 15. metal shaft; 16. support plate; 17. insulating pillar; 18. circuit breaker controller; 19. second wiring terminal. DETAILED DESCRIPTION
[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0026] Example 1
[0027] like Figure 1-8 As shown, this embodiment provides a column circuit breaker combination structure for a box transformer, including a column circuit breaker 1, a disconnector and a grounding terminal 2. A first terminal 3 is provided on the column circuit breaker 1, and an isolating knife 4 is provided on the disconnector. Specifically, the isolating knife 4 can rotate with one end close to the disconnector as the rotation center, and the position of the rotation center is fixed. The isolating knife 4 can be connected to the first terminal 3 or the grounding terminal 2 when rotating.
[0028] The first wiring terminal 3 is located in the middle of the column circuit breaker 1, and the position of the isolating knife 4 near the isolating switch is fixed, and the other end is rotatably connected to the first wiring terminal 3 or the grounding terminal 2, so as to realize the closing function or the grounding function. Compared with the prior art, the present embodiment does not need to be equipped with a grounding knife, which saves manufacturing costs and reduces the occupied space.
[0029] Furthermore, the isolating knife 4 is provided with three working positions. The connection position between the isolating knife 4 and the first terminal 3 is recorded as the closing position 5, the connection position between the isolating knife 4 and the grounding terminal 2 is recorded as the grounding position 6, and the position where the isolating knife 4 is turned between the first terminal 3 and the grounding terminal 2 is recorded as the isolating position 7.
[0030] When the isolating knife 4 is not connected to the first wiring terminal 3 and is not connected to the grounding terminal 2, the isolating knife 4 is in an isolated state. Different from the prior art, the end of the isolating knife 4 connected to the column circuit breaker 1 is open and closed. When in the isolation position 7, the isolating knife 4 is close to the base 8, so the isolating knife 4 does not affect other insulation distances and can be grounded to the first wiring terminal 3. In this way, the isolating knife 4 has three functions of closing, isolating and grounding.
[0031] Furthermore, the column circuit breaker 1 , the disconnector and the grounding terminal 2 are installed on the same base 8 .
[0032] The utility model is generally applied to indoor environment, and the column type circuit breaker 1 can adopt a porcelain column, and can also adopt an insulating material casting molding.
[0033] Example 2
[0034] like Figure 1-5 As shown, this embodiment provides a column circuit breaker combination structure for a box transformer. On the basis of Embodiment 1, the isolating switch includes an operating rod 9, an insulating pull rod 10, an operating seat 11 and a rotating shaft 12. The position of the operating seat 11 is fixed. One end of the operating rod 9 is hinged to the operating seat 11, and the other end is hinged to the insulating pull rod 10. The top end of the insulating pull rod 10 is hinged to the isolating knife 4. The rotating shaft 12 is installed on the operating seat 11. The operating rod 9 is fixed on the rotating shaft 12. The operating rod 9 is hinged to the operating seat 11 through the rotating shaft 12. The rotating shaft 12 drives the operating rod 9 to rotate, thereby realizing the rotation of the isolating knife 4. When in the isolating position 7, the isolating knife 4 is closer to the base 8.
[0035] The rotation of the isolating knife 4 is realized by the above-mentioned structure. Specifically, the operating rod 9 is rotated, and the operating rod 9 drives the insulating pull rod 10 to move. The insulating pull rod 10 then drives the isolating knife 4 to rotate with one end of it as the rotation center, thereby realizing the connection with different terminals, so that the isolating knife 4 has the three functions of closing, isolating and grounding.
[0036] Furthermore, the column circuit breaker 1 and the isolating switch are in multiple groups, and there is one rotating shaft 12. One rotating shaft 12 simultaneously adjusts multiple isolating knives 4 to make the same rotating action, and a rotating handle 13 is installed at one end of the rotating shaft 12.
[0037] A rotating shaft 12 is used to simultaneously control a plurality of isolating switches 4, and a rotating handle 13 is used to control the rotational position of the isolating switches 4, so as to realize the mutual conversion among the three functions of closing, isolating and grounding.
[0038] This embodiment also includes a circuit breaker controller 18, which is installed at the end or middle of the column circuit breaker 1; when the circuit breaker controller 18 is installed at one end of the column circuit breaker 1, the other end of the column circuit breaker 1 is provided with a second terminal 19, and the first terminal 3 is provided in the middle of the column circuit breaker 1; when the circuit breaker controller 18 is installed in the middle of the column circuit breaker 1, the first terminal 3 is provided at one end of the column circuit breaker 1, and the other end of the column circuit breaker 1 is provided with a second terminal 19.
[0039] The isolating switch 4 is installed on the insulating support 17 and rotates with the connection position with the insulating support 17 as the rotation center. When the box-type transformer is equipped with a current transformer, in order to further save space, the insulating support 17 can be omitted and a current transformer can be used instead of the insulating support 17 to provide rotation support for the isolating switch 4.
[0040] Example 3
[0041] like Figure 6-9 As shown, this embodiment provides a column-type circuit breaker combination structure for a box-type transformer, which, based on Embodiment 1, includes a rotating shaft 12, the rotating shaft 12 is mounted on a support plate 16, an isolating knife 4 is fixed on the rotating shaft 12, one end of the isolating knife 4 is hinged to the support plate 16 through the rotating shaft 12, and a rotating handle 13 is installed at one end of the rotating shaft 12.
[0042] At present, the isolating knife 4 in the prior art is isolated by an insulating pull rod 10, such as Example 2, but the insulating pull rod 10 itself occupies space, and it also takes up a lot of space when it is in action. The present embodiment omits components such as the operating rod 9, the insulating pull rod 10 and the operating seat 11, and directly changes the rotating shaft 12 to the position of the rotation center of the isolating knife 4. When the rotating handle 13 is rotated, the rotating shaft 12 can directly drive the isolating knife 4 to rotate, thereby realizing the three functions of closing, isolating and grounding of the isolating knife 4.
[0043] Furthermore, the column circuit breaker 1 and the isolating switch are multiple groups, and there is one rotating shaft 12. The rotating shaft 12 includes an insulating connecting rod 14 and a metal shaft 15 that are connected and spaced apart. One end of the isolating knife 4 is fixed on the metal shaft 15. One rotating shaft 12 simultaneously adjusts multiple isolating knives 4 to make the same rotational movement.
[0044] The isolating knife 4 and the metal shaft 15 are fixedly connected, and the metal shafts 15 on multiple isolating knives 4 are fixed together by insulating connecting rods 14. When the rotating handle 13 is operated, multiple insulating connecting rods 14, the metal shaft 15 and the isolating knives 4 will rotate together with the rotating handle 13, so that multiple isolating knives 4 are in the closing position 5, the isolating position 7 or the grounding position 6 at the same time.
[0045] In this embodiment, the rotating shaft 12 is directly arranged at the rotation center position of the isolating knife 4, and the isolating knife 4 is directly driven to rotate by the rotating handle 13, thereby eliminating the conventional insulating rod 10, saving not only the space occupied by the insulating rod 10 itself, but also the activity space of the insulating rod 10 when it is in motion, thereby reducing the overall size of this embodiment, thereby reducing the overall volume of the high-voltage chamber of the box-type transformer, so that the voltage level of the box-type transformer can be higher, at 66kV and above.
[0046] Furthermore, one end of the rotating shaft 12 is mounted on the support plate 16, and the other end is mounted on the insulating support 17. When the box-type transformer is provided with a current transformer, in order to further save space, the insulating support 17 can be omitted, and the other end of the rotating shaft 12 is mounted on the current transformer, and the current transformer is used instead of the insulating support 17 to support the rotating shaft 12.
[0047] This embodiment also includes a circuit breaker controller 18, which is installed at the end or middle of the column circuit breaker 1; Figure 6 When the circuit breaker controller 18 is installed at one end of the column circuit breaker 1, the other end of the column circuit breaker 1 is provided with a second terminal 19, and the first terminal 3 is provided in the middle of the column circuit breaker 1; Fig. 9 When the circuit breaker controller 18 is installed in the middle of the column circuit breaker 1 , the first terminal 3 is provided at one end of the column circuit breaker 1 , and the second terminal 19 is provided at the other end of the column circuit breaker 1 .
[0048] 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 and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.
Claims
1. A column type circuit breaker combination structure for a box transformer, characterized in that: The invention comprises a column type circuit breaker (1), an isolating switch and a grounding terminal (2); the column type circuit breaker (1) is provided with a first wiring terminal (3); the isolating switch is provided with an isolating knife (4); the isolating knife (4) is rotatable with one end close to the isolating switch as a rotation center; the position of the rotation center is fixed; and the other end of the isolating knife (4) can be connected to the first wiring terminal (3) or the grounding terminal (2) when rotating.
2. A column type circuit breaker assembly structure for a box transformer according to claim 1, characterized in that: The isolating knife (4) is provided with three working positions. The connection position of the isolating knife (4) and the first wiring terminal (3) is recorded as the closing position (5), the connection position of the isolating knife (4) and the grounding terminal (2) is recorded as the grounding position (6), and the position of the isolating knife (4) between the first wiring terminal (3) and the grounding terminal (2) is recorded as the isolating position (7).
3. A column type circuit breaker assembly structure for a box transformer according to claim 1, characterized in that: The isolating switch comprises an operating rod (9), an insulating pull rod (10), an operating seat (11) and a rotating shaft (12); the position of the operating seat (11) is fixed; one end of the operating rod (9) is hinged to the operating seat (11), and the other end is hinged to the insulating pull rod (10); the top end of the insulating pull rod (10) is hinged to the isolating knife (4); the rotating shaft (12) is mounted on the operating seat (11); the operating rod (9) is fixed on the rotating shaft (12); and the operating rod (9) is hinged to the operating seat (11) via the rotating shaft (12).
4. A column type circuit breaker assembly structure for a box transformer according to claim 3, characterized in that: The column-type circuit breaker (1) and the isolating switch are in multiple groups, the rotating shaft (12) is one, and the one rotating shaft (12) simultaneously adjusts multiple isolating knives (4) to perform the same rotating action.
5. The column type circuit breaker assembly structure for box-type transformer according to claim 1, characterized in that: It comprises a rotating shaft (12), the rotating shaft (12) being mounted on a support plate (16), the isolating knife (4) being fixed on the rotating shaft (12), and one end of the isolating knife (4) being hinged to the support plate (16) via the rotating shaft (12).
6. A column type circuit breaker assembly structure for a box transformer according to claim 5, characterized in that: The column-type circuit breaker (1) and the isolating switch are in multiple groups, the rotating shaft (12) is one, the rotating shaft (12) comprises an insulating connecting rod (14) and a metal shaft (15) which are arranged and connected at intervals, one end of the isolating knife (4) is fixed on the metal shaft (15), and the one rotating shaft (12) simultaneously adjusts multiple isolating knives (4) to perform the same rotational action.
7. A column type circuit breaker assembly structure for a box transformer according to claim 5, characterized in that: One end of the rotating shaft (12) is mounted on the support plate (16), and the other end is mounted on the insulating support pillar (17).
8. A column type circuit breaker assembly structure for a box transformer according to claim 1, characterized in that: The column-type circuit breaker (1), the isolating switch and the grounding terminal (2) are mounted on the same base (8).
9. A column type circuit breaker assembly structure for a box transformer according to claim 4 or 6, characterized in that: The invention also comprises a circuit breaker controller (18), wherein the circuit breaker controller (18) is installed at an end or a middle part of the column type circuit breaker (1); when the circuit breaker controller (18) is installed at one end part of the column type circuit breaker (1), a second terminal (19) is provided at the other end of the column type circuit breaker (1), and the first terminal (3) is provided at the middle part of the column type circuit breaker (1); when the circuit breaker controller (18) is installed at the middle part of the column type circuit breaker (1), the first terminal (3) is provided at one end of the column type circuit breaker (1), and a second terminal (19) is provided at the other end of the column type circuit breaker (1).