On-load tap-changer core body and on-load tap-changer

Abstract

The utility model provides an on-load tap-changer core body and an on-load tap-changer, the on-load tap-changer core body comprises a main shaft, an upper shaft plate, a lower shaft plate, a moving contact group and a leading-out contact group, the main shaft comprises two oppositely arranged shaft plates, the two shaft plates are oppositely provided with installation holes used for installing the upper shaft plate, the lower shaft plate, the moving contact set and the leading-out contact set respectively, and the upper shaft plate, the lower shaft plate, the moving contact set and the leading-out contact set are connected with the two shaft plates through the installation holes. The upper shaft plate and the lower shaft plate are respectively arranged at two ends of the main shaft, and the moving contact group and the leading-out contact group are arranged between the upper shaft plate and the lower shaft plate. According to the utility model, the mounting holes are arranged on the shaft plates, so that the upper shaft plate, the lower shaft plate, the moving contact group and the leading-out contact group can be mounted between the two shaft plates through corresponding hole positions, and the required distance can be achieved after the shaft plates are fastened, thereby reducing the working procedures and improving the assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of on-load tap-changers, and particularly relates to an on-load tap-changer core body and an on-load tap-changer. Background Art

[0002] An on-load tap-changer refers to a voltage regulating device suitable for operation under the excitation or load of a transformer and used to change the tap connection position of the transformer winding. Its basic principle is to realize the switching between taps in the transformer winding without interrupting the load current, so as to change the number of turns of the winding, that is, the voltage ratio of the transformer, and finally achieve the purpose of voltage regulation. The core body of the on-load tap-changer and the electric mechanism are designed into an integral plug-in structure. The core body mainly consists of a main shaft, an upper shaft plate, a lower shaft plate, a moving contact group and a lead-out contact group.

[0003] When installing the core body of the existing on-load tap-changer, it is necessary to first fix the upper shaft plate and the lower shaft plate on the main shaft with split pins respectively, and then install the assembled moving contact group and the lead-out contact group on the main shaft. When installing the contact group, the assembler needs to first fasten the contact group on the main shaft with bolts to prevent sliding, then measure the distance between each contact group with a vernier caliper, drill holes with a bench drill after adjusting the distance, and drive split pins into the holes for final positioning. The operation is very troublesome and the efficiency is very low. Summary of the Utility Model

[0004] The embodiments of the utility model provide an on-load tap-changer core body and an on-load tap-changer, which can improve the technical problems of troublesome installation operation and low efficiency of the existing on-load tap-changer core body.

[0005] In a first aspect, the embodiments of the utility model provide an on-load tap-changer core body, including a main shaft, an upper shaft plate, a lower shaft plate, a moving contact group and a lead-out contact group. The main shaft includes two relatively arranged shaft plates. Relatively arranged on the two shaft plates are mounting holes respectively used for mounting the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group. The upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group are connected to the two shaft plates through the mounting holes. The upper shaft plate and the lower shaft plate are respectively arranged at both ends of the main shaft, and the moving contact group and the lead-out contact group are arranged between the upper shaft plate and the lower shaft plate.

[0006] The beneficial effects of the embodiments of the utility model: By pre-setting mounting holes on the two relatively arranged shaft plates, the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group can be installed between the two shaft plates through the corresponding hole positions, and the required distance can be achieved after fastening, reducing the processes, making the assembly simpler and improving the assembly efficiency.

[0007] In one embodiment, the two shaft plates are rectangular plates.

[0008] Advantages of the embodiment of the present utility model: The main shaft is changed from the original round shaft to a rectangular plate, which is convenient for more precisely machining the mounting holes on the shaft plate and controlling the spacing and position between the mounting holes.

[0009] In one embodiment, the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group are provided with fixing holes matching the mounting holes.

[0010] Advantages of the embodiment of the present utility model: By pre-setting the fixing holes on the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group, it is convenient for the installation between the upper shaft plate, the lower shaft plate, the moving contact group, the lead-out contact group and the main shaft.

[0011] In one embodiment, bolts are arranged in the mounting holes and the fixing holes to connect the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group with the main shaft.

[0012] Advantages of the embodiment of the present utility model: By using bolts to fasten the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group on the main shaft, the operation is simple and an effective connection can be ensured.

[0013] In one embodiment, a lock washer is arranged on the bolt arranged in the fixing hole of the upper shaft plate.

[0014] Advantages of the embodiment of the present utility model: The upper shaft plate is the main stressed part. When installing the upper shaft plate, using a lock washer can prevent the bolt from loosening.

[0015] In one embodiment, the bolt is an internal hexagon bolt.

[0016] Advantages of the embodiment of the present utility model: The internal hexagon bolt has high strength.

[0017] In one embodiment, the number of mounting holes on the shaft plate for installing the upper shaft plate is more than the number of mounting holes for installing the lower shaft plate.

[0018] Advantages of the embodiment of the present utility model: The upper shaft plate is the main stressed part. Having more mounting holes can ensure the overall stability of the chip. At the same time, the installation direction of the shaft plate can be quickly judged by the number of mounting holes, which is convenient for installation.

[0019] In one embodiment, a wire thread insert is arranged in the mounting hole on the shaft plate for installing the moving contact group.

[0020] Advantages of the embodiments of the present utility model: Since the bracket of the moving contact is an insulating part, when the bracket is connected to the shaft plate, a wire insert can be embedded in the installation hole to strengthen and protect the bracket, thereby improving the reliability of the connection between the moving contact group and the shaft plate.

[0021] In a second aspect, an on-load tap-changer provided by an embodiment of the present utility model includes the on-load tap-changer core body as described above.

[0022] Advantages of the embodiments of the present utility model:

[0023] By pre-setting installation holes on two relatively arranged shaft plates, the upper shaft plate, the lower shaft plate, the moving contact group and the lead-out contact group can be installed between the two shaft plates through corresponding hole positions. After fastening, the required spacing can be achieved, reducing the processes, making the assembly simpler, and improving the assembly efficiency. At the same time, the main shaft does not need to be machined again in the machining workshop, and the use of parts such as clamping rings and split pins is reduced, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a three-dimensional schematic diagram of the on-load tap-changer core body provided by the embodiment of the present utility model;

[0026] Figure 2 is a structural schematic diagram of the shaft plate provided by the embodiment of the present utility model.

[0027] Reference numerals: upper shaft plate 1, shaft plate 2, moving contact group 3, lead-out contact group 4, lower shaft plate 5, installation hole 6, fixing hole 7. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0029] Please refer to Figure 1 , 2 , an on-load tap-changer core body is provided in an embodiment of the present application, including a main shaft, an upper shaft plate 1, a lower shaft plate 5, a moving contact group 3, and a lead-out contact group 4. The upper shaft plate 1 and the lower shaft plate 5 are respectively arranged at both ends of the main shaft, and the moving contact group 3 and the lead-out contact group 4 are arranged between the upper shaft plate 1 and the lower shaft plate 5.

[0030] The main shaft includes two relatively arranged shaft plates 2, and the shaft plates 2 are rectangular plates. Mounting holes 6 for respectively mounting the upper shaft plate 1, the lower shaft plate 5, the moving contact group 3, and the lead-out contact group 4 are oppositely opened on the two shaft plates 2, and the upper shaft plate 1, the lower shaft plate 5, the moving contact group 3, and the lead-out contact group 4 are provided with fixing holes 7 matching the mounting holes 6. By installing bolts in the mounting holes 6 and the fixing holes 7, the upper shaft plate 1, the lower shaft plate 5, the moving contact group 3, and the lead-out contact group 4 are connected to the main shaft. A lock washer is sleeved on the bolt in the fixing hole 7 of the upper shaft plate 1 to prevent the bolt from loosening. The bolt can be an internal hexagon bolt. A wire thread insert is arranged in the mounting hole 6 on the shaft plate 2 for mounting the moving contact group 3. The number of mounting holes 6 on the shaft plate 2 for mounting the upper shaft plate 1 is more than the number of mounting holes 6 for mounting the lower shaft plate 5.

[0031] The above has introduced the embodiments of the present utility model in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An on-load tap changer core, characterized in that: The invention comprises a main shaft, an upper shaft plate (1), a lower shaft plate (5), a moving contact group (3) and a lead-out contact group (4); the main shaft comprises two shaft plates (2) arranged opposite to each other; mounting holes (6) for mounting the upper shaft plate (1), the lower shaft plate (5), the moving contact group (3) and the lead-out contact group (4) are arranged opposite to each other on the two shaft plates (2); the upper shaft plate (1), the lower shaft plate (5), the moving contact group (3) and the lead-out contact group (4) are connected to the two shaft plates (2) via the mounting holes (6); the upper shaft plate (1) and the lower shaft plate (5) are arranged at two ends of the main shaft respectively; the moving contact group (3) and the lead-out contact group (4) are arranged between the upper shaft plate (1) and the lower shaft plate (5).

2. The on-load tap changer core according to claim 1, characterized in that: The two shaft plates (2) are rectangular plates.

3. The on-load tap changer core according to claim 1, characterized in that: The upper shaft plate (1), the lower shaft plate (5), the moving contact group (3) and the lead-out contact group (4) are provided with fixing holes (7) matching the mounting holes (6).

4. The on-load tap changer core according to claim 3, characterized in that: Bolts are provided in the mounting hole (6) and the fixing hole (7) to connect the upper shaft plate (1), the lower shaft plate (5), the moving contact group (3) and the lead-out contact group (4) to the main shaft.

5. The on-load tap changer core according to claim 4, characterized in that: A stop washer is provided on the bolt disposed in the fixing hole (7) of the upper shaft plate (1).

6. The on-load tap changer core according to claim 4, characterized in that: The bolt is a hexagon socket bolt.

7. The on-load tap changer core according to claim 1, characterized in that: The number of the mounting holes (6) on the shaft plate (2) for mounting the upper shaft plate (1) is greater than the number of the mounting holes (6) for mounting the lower shaft plate (5).

8. The on-load tap changer core according to claim 1, characterized in that: A wire screw sleeve is provided in a mounting hole (6) on the shaft plate (2) for mounting the moving contact group (3).

9. An on-load tap changer, characterized in that: The invention comprises an on-load tap changer core as claimed in any one of claims 1 to 8.

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