CN220895364U

CN220895364U - Tapping switch protection device

Info

Publication number: CN220895364U
Application number: CN202322441113.2U
Authority: CN
Inventors: 施飞; 赵梁辉; 李珩; 何春雨; 肖瑶
Original assignee: Ningbo Aokes Intelligent Technology Co ltd
Current assignee: Ningbo Aokes Intelligent Technology Co ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-05-03
Anticipated expiration: 2033-09-07

Abstract

A tapping switch protection device relates to the technical field of transformers. The tapping switch protection device comprises an insulating plate, copper bars and a tapping switch. And a connecting bolt is arranged on one side of the tapping switch, which is close to the copper bar. The insulation board sets up between connecting bolt and copper bar and with tapping switch fixed connection for isolated connecting bolt and copper bar. The tapping switch protecting device improves the insulating performance of the transformer switch by arranging the insulating plate between the copper bar and the tapping switch, and can ensure the insulating strength even if the tapping switch is in contact with low voltage or ground.

Description

Tapping switch protection device

Technical Field

The utility model relates to the technical field of transformers, in particular to a tapping switch protection device.

Background

The tapping switch is a core component for regulating the voltage of the transformer. The industrial frequency withstand voltage test is a factory test of the transformer and is an important index for verifying the insulation performance of the transformer. The tapping switch is connected with the high-voltage lead and is in a bare state, and a low-voltage outlet copper bar exists at the lower part, so that the insulation strength of the switch is an important consideration, and the insulation performance of the switch to the nearby low voltage and the ground needs to be ensured.

The inventor researches that the existing tap switch generally adopts the method of increasing the distance between a high-voltage charged body and a grounded or low-voltage charged body or increasing solid insulation to ensure the strength of insulation. The mode of adding the tapping switch to the low-voltage live body or the grounding position is adopted, the copper bar is in a bare state, and the low-voltage copper bar can be shifted under the condition that jolt or a transformer is impacted by short-circuit current in a power grid, so that voltage breakdown is caused near the high-voltage tapping switch. And by adopting a solid insulation mode, each section of the copper bar at the lower part of the tapping switch needs to be protected so as to avoid breakdown caused by protection deficiency, thereby burning out the transformer. In the prior art, no good solid insulation measure exists between the tapping switch and the low-voltage copper bar, a large area is needed, insulation reinforcement is carried out in multiple areas, and if the situation of binding missing or paperboard deviation exists, high-voltage and low-voltage insulation cannot be realized.

Disclosure of utility model

The utility model aims to provide a tapping switch protection device which can isolate a switch from a lower low-voltage live body or ground and improve the insulation performance of a transformer switch.

Embodiments of the present utility model are implemented as follows:

The utility model provides a tapping switch protection device which comprises an insulating plate, a copper bar and a tapping switch, wherein a connecting bolt is arranged on one side, close to the copper bar, of the tapping switch, and the insulating plate is arranged between the connecting bolt and the copper bar and is fixedly connected with the tapping switch and used for isolating the connecting bolt from the copper bar.

In an optional embodiment, the insulation board comprises an insulation board body and a plurality of support boards, the support boards are perpendicular to the insulation board body and fixedly connected with the insulation board body, clamping grooves corresponding to the support boards are formed in the tapping switch, and the support boards are used for being inserted into the clamping grooves to fix the tapping switch.

In an alternative embodiment, the tap changer comprises a mounting base and a switch body, the mounting base comprising a first side and a second side, the switch body being arranged on the first side, the connecting bolt being arranged on the second side.

In an alternative embodiment, a threading hole is formed in a side, away from the insulating plate body, of the support plate, and a plurality of threading holes are formed in one side of the first side surface and used for sequentially penetrating through the binding belt to fix the tapping switch.

In an alternative embodiment, a fixing piece is detachably connected to one side, far away from the insulating plate body, of the support plate, and the fixing piece is annular and abuts against the first side face.

In an alternative embodiment, the edge of the second side is provided with a bolt connection piece, the bolt connection piece comprises a first plane connected with the second side and a second plane for installing the connecting bolt, and an included angle is formed between the first plane and the second plane.

In an alternative embodiment, the connecting bolts are provided in several numbers and along the edges of the second side.

In an alternative embodiment, the insulation board body is provided with a notch, one side of the support board is provided with a bending part, and the bending part penetrates through the notch and abuts against one side of the insulation board, which is away from the support board.

In an alternative embodiment, the extending surfaces of the plurality of support plates intersect with a mounting shaft, and when the support plates are inserted into the clamping grooves, the mounting shaft coincides with the central axis of the tapping switch.

In an alternative embodiment, the included angle between the extension surfaces of two adjacent support plates is the same.

The embodiment of the utility model has the beneficial effects that:

The utility model comprises an insulating plate, a copper bar and a tapping switch. The tapping switch is close to one side of copper bar and is equipped with connecting bolt, and the insulation board sets up between copper bar and connecting bolt and with tapping switch fixed connection. By arranging the insulating plate between the copper bar and the tapping switch, the insulating performance of the transformer switch is improved, and even if the tapping switch is in contact with low voltage or ground, the insulating strength can be ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of a first view angle of a tap changer protection device according to an embodiment of the utility model;

Fig. 2 is a schematic diagram of a second view angle of the tap changer protection device according to an embodiment of the utility model;

fig. 3 is a schematic structural diagram of an insulating board body according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a support plate according to an embodiment of the present utility model;

Fig. 5 is a schematic diagram of a third view angle of the tap changer protection device according to an embodiment of the utility model.

Icon 100-tap switch guard; 10-an insulating plate; 11-an insulating plate body; 111-notch; 12-supporting plates; 121-threading holes; 122-bending part; 20-tapping switch; 21-connecting bolts; 22-clamping grooves; 23-mounting seats; 231-a first side; 232-a second side; 24-a switch body; 25-bolting; 251-a first plane; 252-second plane.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, the present embodiment provides a tapping switch protection device 100, which includes an insulating plate 10, a copper bar (not shown), and a tapping switch 20. The tapping switch 20 is provided with a connecting bolt 21 on the side close to the copper bar. The insulating plate 10 is arranged between the connecting bolt 21 and the copper bar and fixedly connected with the tapping switch 20, and is used for isolating the connecting bolt 21 and the copper bar.

It will be appreciated that in this embodiment, the connection bolt 21 of the tap changer 20 is used to connect a high voltage wire, and a low voltage wire copper bar is disposed below it. The insulating plate 10 is located between the connecting bolts 21 and the copper bars to prevent displacement of the low voltage copper bars in case of jolt or impact of short circuit current in the power grid to the transformer, thereby causing breakdown voltage near the high voltage tap changer 20.

In the present embodiment, the main material of the insulating plate 10 is cardboard, and in other embodiments, the material of the insulating plate 10 may be rubber, plastic, or the like.

In order to achieve the fixation of the tap changer 20, the insulating plate 10 comprises an insulating plate body 11 and a number of support plates 12. The support plate 12 is perpendicular to the insulating plate body 11 and fixedly connected with the insulating plate body. The tapping switch 20 is provided with a clamping groove 22 corresponding to the support plate 12, and the support plate 12 is used for being inserted into the clamping groove 22 to fix the tapping switch 20.

Specifically, in the present embodiment, the tap changer 20 includes a mount 23 and a switch body 24. The mounting block 23 includes a first side 231 and a second side 232. The switch body 24 is disposed on the first side 231. The connecting bolt 21 is arranged on the second side 232. The support plate 12 is provided with a threading hole 121 at a side far from the insulating plate body 11, and a plurality of threading holes 121 are located at a side of the first side 231 for sequentially passing through the binding tape or the binding wire to fix the tap changer 20.

It will be appreciated that when the tap changer 20 is mounted on the insulating plate 10, the support plate 12 is inserted into the clamping groove 22, one end of the support plate 12 extends out of the clamping groove 22, and the side of the support plate 12 away from the insulating plate body 11 is higher than the first side 231, i.e. the threading hole 121 is higher than the first side 231. At this time, the position of the tap changer 20 in the installation direction may be determined by sequentially passing and fixing the adjacent two wire holes 121 with a tie or a binding wire.

Alternatively, in other embodiments, a fixing member (not shown) may be detachably attached to the side of the stay 12 away from the insulating plate body 11. The fixing member is annular and abuts against the first side 231. It will be appreciated that when the support plate 12 is inserted into the slot 22, the tap changer 20 is installed in place, the fixing member may be attached to the support plate 12 over the first side 231, thereby restricting displacement of the tap changer 20 in the installation direction.

It should be noted that when the stay 12 is inserted into the card slot 22, the circumferential position of the tap changer 20 around the installation direction has been determined. In the present embodiment, the width of the clamping groove 22 is slightly larger than the thickness of the support plate 12, and when the support plate 12 is inserted into the clamping groove 22, the tap changer 20 can still move along the installation direction, and the tap changer 20 is fixed by a binding belt or a binding wire so as to limit the displacement of the tap changer 20 along the installation direction. In other embodiments, the width of the slot 22 may be slightly smaller than the thickness of the support plate 12, and the support plate 12 is inserted into the slot 22 at this time, so that the tap changer 20 can be fixed in both the installation direction and the rotation direction around the installation direction. Alternatively, the thickness of the support plate 12 may be set to be variable, and the thickness of the support plate 12 may be gradually increased from the edge position of the tap changer 20 toward the center.

Referring to fig. 2, in order to facilitate the connection of the high-voltage wire, in the present embodiment, the edge of the second side 232 is provided with a bolt connection member 25. The bolt connection 25 comprises a first plane 251 connected to the second side 232 and a second plane 252 for mounting the connection bolt 21, the first plane 251 and the second plane 252 having an angle therebetween. It will be appreciated that the first plane 251 is located at an edge of the second side 232 and is parallel to the second side 232, and the second plane 252 extends out of the second side 232 and is bent downward. When the connecting bolt 21 is mounted on the second plane 252, the connecting bolt 21 gradually approaches the tap changer 20 from the head to the screw.

Optionally, the connecting bolts 21 are provided in several numbers and along the edges of the second side 232. Further, in the present embodiment, a supporting member (not shown) is further disposed on the second side 232, and the supporting member abuts against the insulating plate body 11, so as to prevent the connecting bolt 21 from directly contacting the insulating plate body 11. In other embodiments, the connecting bolt 21 may be abutted to the insulating plate body 11.

Referring to fig. 3 and 4, the insulating plate body 11 is provided with a notch 111, and a bending portion is disposed on one side of the support plate 12. The bending part penetrates through the notch 111 and abuts against one side of the insulating plate body 11, which is away from the support plate 12. It can be understood that the included angle between the support plate 12 and the bending portion 122 is 90 °, and when the bending portion 122 abuts against the insulating plate body 11, the support plate 12 is perpendicular to the insulating plate body 11. It should be noted that the width of the slot 111 should be slightly greater than the thickness of the plate 12. When the stay 12 and the insulating plate 10 are installed vertically, the stay 12 and the insulating plate 10 are bonded with glue.

Referring to fig. 5, the extending surfaces of the plurality of support plates 12 intersect at the mounting axis. When the strip 12 is inserted into the slot 22, the mounting shaft coincides with the central axis of the tap changer 20. It will be appreciated that the extension surfaces of the plurality of plates 12 intersect a straight line, which is the mounting axis. It should be noted that, in the present embodiment, the mounting seat 23 of the tap changer 20 is a cylinder, and the central axis of the tap changer 20 is located at the axis of the cylinder. In other embodiments, the tap changer 20 may have other shapes, with the central axis of the tap changer 20 being a generally geometrically centered position parallel to the installation direction.

In order to make the force applied to the tie or binding wire uniform, the angle between the extended faces of two adjacent plates 12 is the same. It should be noted that in this embodiment, the number of the support plates 12 is three, and the support plates 12 are arrayed circumferentially around the mounting axis, and the angle between the extending surfaces of the support plates 12 is 120 °. In other embodiments, the number of the support plates 12 may be N, and the included angle between the extension surfaces of the support plates 12 is 360 °/N.

The working principle and process of the tapping switch protecting device 100 provided by the utility model are as follows:

When the tapping lead is installed, the insulating plate 10 is fixed on the low-voltage copper bar, the clamping groove 22 of the tapping switch 20 is aligned to the position of the support plate 12 and is inserted until the threading hole 121 is exposed out of the first side 231, at this time, the tapping switch 20 is fixed around the circumference of the installation direction, that is, after the tapping switch 20 cannot be rotationally inserted, at the position of the threading hole 121 on the upper part of the support plate 12, two adjacent support plates 12 or all support plates 12 are connected and fixed by using a binding belt or a binding wire, at this time, the position of the tapping switch 20 along the installation direction is fixed, that is, the tapping switch 20 cannot move along the installation direction, and the tapping switch 20 cannot be separated from the insulating plate 10. After the tap changer 20 is installed, the high-voltage wire is connected to the connection bolt 21.

The tapping switch protection device 100 provided by the utility model has the beneficial effects that:

The utility model comprises an insulating plate 10, copper bars and a tap changer 20. The tapping switch 20 is provided with a connecting bolt 21 on the side close to the copper bar, and the insulating plate 10 is arranged between the copper bar and the connecting bolt 21 and fixedly connected with the tapping switch 20. By providing the insulating plate 10 between the copper bar and the tap changer 20, the insulating performance at the transformer switch is improved, and even if the tap changer 20 is in contact with low voltage or ground, the insulating strength can be ensured.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a tapping switch protector, its characterized in that includes insulation board, copper bar and tapping switch, the tapping switch is close to one side of copper bar is equipped with connecting bolt, the insulation board sets up connecting bolt with between the copper bar and with tapping switch fixed connection is used for the isolation connecting bolt with the copper bar.

2. The tapping switch protection device according to claim 1, wherein the insulating plate comprises an insulating plate body and a plurality of support plates, the support plates are perpendicular to the insulating plate body and fixedly connected with the insulating plate body, clamping grooves corresponding to the support plates are formed in the tapping switch, and the support plates are used for being inserted into the clamping grooves to fix the tapping switch.

3. The tap changer guard of claim 2, wherein the tap changer comprises a mount and a switch body, the mount comprising a first side and a second side, the switch body being disposed on the first side, the connecting bolt being disposed on the second side.

4. The tapping switch protecting device according to claim 3, wherein a threading hole is provided on a side of the support plate away from the insulating plate body, and a plurality of threading holes are provided on a side of the first side surface for sequentially passing through the binding tape to fix the tapping switch.

5. The tapping switch protecting device according to claim 3, wherein a fixing member is detachably connected to a side of the support plate away from the insulating plate body, and the fixing member is annular and abuts against the first side surface.

6. A tap changer guard according to claim 3, wherein the edge of the second side is provided with a bolted connection comprising a first plane connected to the second side and a second plane on which the connecting bolt is mounted, the first plane and the second plane having an angle therebetween.

7. The tap changer guard of claim 6, wherein the connecting bolts are provided in number and along an edge of the second side.

8. The tapping switch protection device according to claim 2, wherein the insulating plate body is provided with a notch, one side of the supporting plate is provided with a bending part, and the bending part penetrates through the notch and abuts against one side of the insulating plate, which faces away from the supporting plate.

9. The tap changer guard of claim 2, wherein the extended faces of the plurality of support plates intersect at a mounting shaft that coincides with a central axis of the tap changer when the support plates are inserted into the clamping slots.

10. The tap changer guard of claim 9, wherein the angle between the extended faces of two adjacent support plates is the same.