Special high-precision current transformer for GIS (Gas Insulated Switchgear)

Abstract

The utility model discloses a special high-precision current transformer for a GIS (Gas Insulated Switchgear), which belongs to the technical field of high-voltage electrical equipment and comprises a main shell, an auxiliary shell and a current transformer winding are respectively arranged in the main shell, a two-way threaded rod is rotationally connected in the main shell, two moving blocks are in threaded connection with the outer surface of the two-way threaded rod, and the two moving blocks are in threaded connection with the auxiliary shell. And each moving block is slidably connected to the interior of the main shell, a clamping plate is fixedly connected to the upper surface of each moving block, two sets of limiting rods are slidably connected to the interior of the main shell, and the top ends of each set of limiting rods extend to the interior of the auxiliary shell. According to the high-precision current transformer special for the GIS, through cooperation of a plurality of assemblies, the capacity of rapidly fixing the internal structure is achieved, the problem that a large amount of time needs to be wasted during fixing is solved, the working efficiency is effectively improved, and the capacity of conveniently disassembling and overhauling the current transformer when the interior is damaged can be achieved; and the applicability of the GIS current transformer is improved.

Description

Technical Field

[0001] This application belongs to the field of high voltage electrical equipment technology, and in particular relates to a high-precision current transformer for GIS. Background Technology

[0002] In GIS complete sets of equipment, current transformers are one of the important components. The main function of current transformers is to transform the large primary current in the system into a small current according to a specified ratio, isolate the large current in the primary circuit, and provide current for various instruments and relay protection in the secondary system. They are important electrical equipment in the power system.

[0003] The existing utility model with authorization announcement number CN211670105U discloses a GIS current transformer, including a housing and a three-phase shielding cylinder. The housing is provided with lifting lugs inside. The outer ring of the three-phase shielding cylinder is provided with three-phase coils, and the middle part is connected to the lifting lugs through a support plate. The three-phase shielding cylinder is provided with three-phase primary conductors inside. The three-phase primary conductors are fixed to the housing through insulators.

[0004] The above technical solution eliminates the need for traditional shielding covers, insulation boards, tie rods, supports, etc., which greatly simplifies the assembly process, improves production efficiency, reduces equipment costs, and improves equipment reliability. However, the above technical solution does not have the ability to quickly fix the internal structure, which wastes a lot of time and reduces work efficiency. At the same time, it is not convenient to disassemble and repair the internal structure when damage occurs, which reduces the applicability of GIS current transformers.

[0005] To address these issues, we propose a high-precision current transformer specifically designed for GIS systems. Utility Model Content

[0006] The purpose of this application is to solve the problems of the inability to quickly fix and repair damaged current transformers in the prior art, and to propose a high-precision current transformer for GIS.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A high-precision current transformer for GIS includes a main housing. Inside the main housing are a secondary housing and a current transformer winding. A bidirectional threaded rod is rotatably connected inside the main housing. Two moving blocks are threadedly connected to the outer surface of the bidirectional threaded rod. Each moving block is slidably connected inside the main housing. A clamping plate is fixedly connected to the upper surface of each moving block. Two sets of limiting rods are slidably connected inside the main housing. The top end of each set of limiting rods extends into the interior of the secondary housing, and a return spring is fixedly connected to the bottom end of each set of limiting rods. The bottom end of each set of return springs is fixedly connected to the inner bottom wall of the main housing. A snap-fit ​​block is fixedly connected to the back of the secondary housing, and the back of the snap-fit ​​block extends into the interior of the main housing. Adjusting screws are rotatably connected inside both the main and secondary housings. An upper baffle is threadedly connected to the outer surface of each adjusting screw, and each upper baffle is slidably connected inside the main and secondary housings.

[0009] Preferably, an auxiliary bearing is fitted on the outer surface of the bidirectional threaded rod, and the auxiliary bearing is embedded inside the main housing.

[0010] Preferably, a stabilizing block is fixedly connected to the front of each of the movable blocks, and each of the stabilizing blocks is slidably connected to the inside of the main housing.

[0011] Preferably, each set of limiting rods has a push handle fixedly connected to its outer surface, and each push handle is slidably connected to the inside of the main housing.

[0012] Preferably, a first hexagonal nut is fixedly connected to the left end of the bidirectional threaded rod, and a second hexagonal nut is fixedly connected to the top end of each adjusting screw.

[0013] Preferably, each of the adjusting screws has a rotating bearing fitted on its outer surface, and each rotating bearing is embedded inside the main housing and the secondary housing.

[0014] Preferably, each of the upper baffles has a sliding block fixedly connected to its inner wall, and each sliding block is slidably connected to the interior of the main shell and the sub-shell.

[0015] Preferably, a first rubber pad is fixedly connected to one side of each of the two clamping plates that are close to each other, and a second rubber pad is fixedly connected to the bottom surface of each of the upper baffles.

[0016] In summary, the technical effects and advantages of this application are as follows:

[0017] By incorporating a main housing, current transformer windings, a bidirectional threaded rod, moving blocks, clamping plates, adjusting screws, and baffles, the rotation of the bidirectional threaded rod drives the two moving blocks and clamping plates closer together, thereby limiting the two sides of the current transformer windings. Rotating the adjusting screw lowers the upper baffle, limiting the upper surface of the current transformer windings, thus enabling rapid fixing of the internal structure. This solves the problem of wasting a lot of time during fixing, effectively improving work efficiency. The inclusion of limit rods, return springs, and snap-fit ​​blocks allows the main and secondary housings to be combined using the snap-fit ​​blocks and limit rods. The return spring enhances the stability of the combination, and pulling the limit rod removes it from the secondary housing, preventing external interference and allowing for rapid separation of the main and secondary housings. This enables convenient disassembly and repair in case of internal damage, increasing the applicability of GIS current transformers. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the secondary outer shell of this utility model;

[0019] Figure 2 This is a three-dimensional cross-sectional structural diagram of the current transformer winding of this utility model;

[0020] Figure 3 This is a three-dimensional cross-sectional view of the main outer shell of this utility model;

[0021] Figure 4 This is a three-dimensional cross-sectional view of the upper baffle of this utility model.

[0022] In the diagram: 1. Main housing; 2. Secondary housing; 3. Current transformer winding; 4. Bidirectional threaded rod; 5. Moving block; 6. Clamping plate; 7. Limiting rod; 8. Return spring; 9. Snap-fit ​​block; 10. Adjusting screw; 11. Upper baffle; 12. Auxiliary bearing; 13. Stabilizing block; 14. Push handle; 15. First hexagonal nut; 16. Second hexagonal nut; 17. Rotary bearing; 18. Sliding block; 19. First rubber pad; 20. Second rubber pad. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-4A high-precision current transformer for GIS includes a main housing 1. Inside the main housing 1, a secondary housing 2 and a current transformer winding 3 are respectively arranged. A bidirectional threaded rod 4 is rotatably connected inside the main housing 1. An auxiliary bearing 12 is sleeved on the outer surface of the bidirectional threaded rod 4 and embedded inside the main housing 1. The auxiliary bearing 12 can reduce the friction generated by the bidirectional threaded rod 4 when rotating, making the bidirectional threaded rod 4 more sensitive when rotating. At the same time, it can also reduce the wear rate of the bidirectional threaded rod 4 and increase the durability of the bidirectional threaded rod 4.

[0025] The outer surface of the bidirectional threaded rod 4 is threaded with two moving blocks 5. Each moving block 5 is slidably connected to the inside of the main housing 1. Each moving block 5 is fixedly connected to a stabilizing block 13 on its front side. Each stabilizing block 13 is slidably connected to the inside of the main housing 1. The stabilizing block 13 can move simultaneously with the moving block 5 and use the friction generated by itself on the main housing 1 during the movement to improve the stability of the moving block 5 during movement and prevent jamming.

[0026] Each moving block 5 has a clamping plate 6 fixedly connected to its upper surface. Two sets of limiting rods 7 are slidably connected inside the main housing 1. The top of each set of limiting rods 7 extends into the interior of the secondary housing 2. Each set of limiting rods 7 has a push handle 14 fixedly connected to its outer surface. Each push handle 14 is slidably connected inside the main housing 1. By providing the push handle 14, a good force point can be provided for the limiting rod 7, increasing the ease of pulling the limiting rod 7 when needed, and improving the convenience of using the device.

[0027] Each set of limit rods 7 is fixedly connected to a return spring 8 at its bottom end. The bottom end of each set of return springs 8 is fixedly connected to the inner bottom wall of the main housing 1. A snap-fit ​​block 9 is fixedly connected to the back of the secondary housing 2. The back of the snap-fit ​​block 9 extends into the interior of the main housing 1. Adjusting screws 10 are rotatably connected inside both the main housing 1 and the secondary housing 2. A first hexagonal nut 15 is fixedly connected to the left end of the bidirectional threaded rod 4. A second hexagonal nut 16 is fixedly connected to the top of each adjusting screw 10. The first hexagonal nut 15 can provide a good force-bearing position for the bidirectional threaded rod 4, and the second hexagonal nut 16 can provide a good force-bearing position for the adjusting screw 10, further increasing the convenience of use.

[0028] Each adjusting screw 10 has a rotating bearing 17 fitted on its outer surface. Each rotating bearing 17 is embedded inside the main housing 1 and the secondary housing 2. The rotating bearing 17 can reduce the friction generated by the adjusting screw 10 when rotating, making the adjusting screw 10 more sensitive when rotating. It can also reduce the wear rate of the adjusting screw 10 and increase the durability of the adjusting screw 10.

[0029] Each adjusting screw 10 has an upper baffle 11 threadedly connected to its outer surface. Each upper baffle 11 has a sliding block 18 fixedly connected to its inner wall. Each sliding block 18 is slidably connected to the inside of the main housing 1 and the secondary housing 2. The sliding block 18 can move simultaneously with the upper baffle 11 and uses the friction generated by itself on the main housing 1 and the secondary housing 2 during the movement to improve the stability of the upper baffle 11 during movement and prevent jamming.

[0030] Each upper baffle 11 is slidably connected to the inside of the main housing 1 and the secondary housing 2. The two clamping plates 6 are fixedly connected to the side of each other with a first rubber pad 19. The bottom surface of each upper baffle 11 is fixedly connected to a second rubber pad 20. The first rubber pad 19 is used to reduce the damage caused by the clamping plates 6 clamping the two sides of the current transformer winding 3. The second rubber pad 20 is used to reduce the damage caused by the upper baffle 11 limiting the upper surface of the current transformer winding 3. This effectively increases the protection of the current transformer winding 3.

[0031] The working principle of this utility model is as follows: In use, the current transformer winding 3 is first placed inside the main housing 1. When it needs to be fixed, the first hexagonal nut 15 is rotated, which in turn drives the bidirectional threaded rod 4 to rotate. The auxiliary bearing 12 reduces the frictional force when the bidirectional threaded rod 4 rotates, thereby bringing the two moving blocks 5 closer together and causing the clamping plate 6 and the first rubber pad 19 to move simultaneously. This allows the two first rubber pads 19 to contact the two sides of the current transformer winding 3. Then, by rotating the second hexagonal nut 16, the adjusting screw 10 is rotated. The rotating bearing 17 reduces the frictional force generated by the adjusting screw 10, thereby causing the upper baffle 11 and the second rubber pad 20 to descend, and the first… The rubber pad 20 contacts the upper surface of the current transformer winding 3, thereby quickly fixing the position of the current transformer winding 3. Then, the push handle 14 is pressed down to retract the limit rod 7 into the main housing 1, and the locking block 9 is slid into the main housing 1. Then, the push handle 14 is released, and the limit rod 7 is pushed into the secondary housing 2 by the rebound force of the return spring 8, thereby combining the main housing 1 and the secondary housing 2. When it is necessary to disassemble for internal maintenance, the push handle 14 is pressed down to retract the limit rod 7 into the main housing 1 again, and then the secondary housing 2 is moved horizontally and the locking block 9 is moved out of the main housing 1. This achieves the ability to quickly disassemble and improves the convenience of internal structure maintenance.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision current transformer for GIS, comprising a main housing (1), characterized in that: The main housing (1) is equipped with a secondary housing (2) and a current transformer winding (3) respectively. A bidirectional threaded rod (4) is rotatably connected inside the main housing (1). Two moving blocks (5) are threadedly connected to the outer surface of the bidirectional threaded rod (4). Each moving block (5) is slidably connected inside the main housing (1). A clamping plate (6) is fixedly connected to the upper surface of each moving block (5). Two sets of limiting rods (7) are slidably connected inside the main housing (1). The top end of each set of limiting rods (7) extends into the interior of the secondary housing (2). The bottom end of each rod (7) is fixedly connected to a return spring (8). The bottom end of each set of return springs (8) is fixedly connected to the inner bottom wall of the main shell (1). The back of the sub-shell (2) is fixedly connected to a snap-fit ​​block (9). The back of the snap-fit ​​block (9) extends into the interior of the main shell (1). The interiors of the main shell (1) and the sub-shell (2) are rotatably connected to an adjusting screw (10). The outer surface of each adjusting screw (10) is threaded with an upper baffle (11). Each upper baffle (11) is slidably connected to the interiors of the main shell (1) and the sub-shell (2).

2. The high-precision current transformer for GIS as described in claim 1, characterized in that: An auxiliary bearing (12) is fitted on the outer surface of the bidirectional threaded rod (4), and the auxiliary bearing (12) is embedded inside the main housing (1).

3. The high-precision current transformer for GIS as described in claim 1, characterized in that: Each of the moving blocks (5) has a stabilizing block (13) fixedly connected to its front side, and each of the stabilizing blocks (13) is slidably connected to the inside of the main housing (1).

4. A high-precision current transformer for GIS as described in claim 1, characterized in that: Each set of limiting rods (7) has a push handle (14) fixedly connected to its outer surface, and each push handle (14) is slidably connected to the inside of the main housing (1).

5. A high-precision current transformer for GIS as described in claim 1, characterized in that: The left end of the bidirectional threaded rod (4) is fixedly connected to a first hexagonal nut (15), and the top end of each adjusting screw (10) is fixedly connected to a second hexagonal nut (16).

6. A high-precision current transformer for GIS as described in claim 1, characterized in that: Each of the adjusting screws (10) is fitted with a rotating bearing (17) on its outer surface, and each of the rotating bearings (17) is embedded inside the main housing (1) and the secondary housing (2).

7. A high-precision current transformer for GIS as described in claim 1, characterized in that: Each of the upper baffles (11) has a sliding block (18) fixedly connected to its inner wall, and each of the sliding blocks (18) is slidably connected to the interior of the main shell (1) and the secondary shell (2).

8. A high-precision current transformer for GIS as described in claim 1, characterized in that: The two clamping plates (6) are fixedly connected to each other on one side, and the bottom surface of each upper baffle (11) is fixedly connected to a second rubber pad (20).

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