Positioning tool for GIS grounding switch terminal rod

Abstract

The utility model relates to the technical field of positioning tools or clamps, in particular to a positioning tool for a GIS (Gas Insulated Switchgear) grounding switch terminal rod. The positioning tool comprises a box body, the box body is provided with at least two sets of tool faces which are oppositely arranged, the tool faces are specifically a top plate, a bottom plate, a front supporting plate and a rear supporting plate which are oppositely arranged, terminal rod centering insertion holes are formed in the top plate, and the distance between every two adjacent terminal rod centering insertion holes is the distance between terminal rods; a jackscrew hole is formed in the front supporting plate, and a locking jackscrew is arranged in the jackscrew hole and used for locking and fixing the terminal rod; a positioning block is arranged in the box body and is provided with a fixed-height supporting surface for fixing the height in the height direction and a directional locking surface for positioning in the horizontal direction. According to the positioning tool, the terminal rods are limited through the terminal rod centering insertion holes, orientation and supporting are carried out through the orientation locking faces and the fixed-height supporting faces of the positioning blocks, it is well guaranteed that the parallelism and the height of all the terminal rods are flush, the box body can be turned over, and nuts can be conveniently fastened.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning tools or jigs, in particular to a positioning tool for a terminal rod of a GIS earthing switch. Background Art

[0002] Gas-insulated metal-enclosed switchgear is a metal-enclosed switchgear and control equipment in which at least a part uses a gas at a pressure higher than atmospheric pressure as an insulating medium. GIS (Gas Insulated Switchgear) is the English abbreviation of gas-insulated totally enclosed combination equipment. GIS is composed of a circuit breaker, a disconnector, an earthing switch, a current transformer, a busbar, etc. These devices or components are all enclosed in a metal earthed enclosure, and an SF6 insulating gas with a certain pressure is filled inside. The main function of the earthing switch is to ground the internal conductor of the GIS when the GIS equipment is out of service for maintenance, so as to avoid the induced charge or residual charge generated by the GIS equipment from harming the operator or damaging the equipment, and ensure the safety of the equipment and the operation.

[0003] The structure of the earthing switch is as Figure 1 shown. After the earthing switch is grounded, the current on the line will pass through the contact rod 1, the finger 2, the conductor 3, the current-carrying bar 4, and the terminal rod 5 of the earthing switch and be transmitted to the external earthing system 6 outside the gas chamber. The structure of the terminal rod in the above earthing switch is as Figures 2-4 shown. The terminal rod 5 of the earthing switch is an overall stepped shaft structure. The small end of the stepped shaft is a screw rod 10, and the large end is axially provided with an axial section 11 along its axis. At the same time, a radial section 34 is also provided radially at the axial section 11. The screw rod 10 is used to connect the nut and the external earthing system 6 outside the gas chamber. A threaded hole 13 is provided on the axial section 11 for connecting and fixing the axial section 11 of the terminal rod 5 of the earthing switch and the current-carrying bar 4. The step surface between the screw rod 10 and the body of the terminal rod 5 of the earthing switch is a sealing surface 12, which is used to cooperate with the sealing groove and the sealing ring on the insulating plate 7 for sealing. During the production and assembly process of the earthing switch, the assembly of the terminal rod 5 of the earthing switch and the insulating plate 7 is an important process, which requires that the distances between the three terminal rods are equal and the axial sections of the terminal rods are on the same plane. When the terminal rod and the insulating plate are butted, it is ensured that the O-ring cannot come off.

[0004] The structure of the existing positioning tool for the terminal rod 5 of the above earthing switch is as Figure 5 shown. The positioning tool includes a positioning plate 14, and three equally spaced light holes 15 are provided on the positioning plate 14. The distance between two adjacent light holes 15 is the phase distance of the terminal rod 5 of the earthing switch. When using the above tool to assemble the terminal rod 5 of the earthing switch and the insulating plate 7, its assembly state is as Figure 6As shown in the figure, align the axial section 11 of the three grounding switch terminal rods 5 with the three light holes 15 on the positioning plate 14, paste them together, and fixedly connect them with bolts 16 so that the axial sections of the terminal rods are on the same plane. Then, sleeve an insulating plate 7 on the screw 10 of the grounding switch terminal rod 5, install a screw on the end face of the screw 10, and set a nut 9 on the screw to tightly install the insulating plate 7. A sealing ring 8 is provided on the sealing surface 12 of the insulating plate 7 and the grounding switch terminal rod 5 for sealing.

[0005] There are the following deficiencies in positioning and installing the terminal rod with the above existing tooling: First, each terminal rod is fixedly connected to the tooling only through one light hole 15, and the parallelism between the terminal rods cannot be guaranteed, that is, the vertical distance between adjacent two terminal rods is inconsistent, affecting the sealing effect of the sealing ring; Second, when tightening the nut, due to the small contact area at the bottom of the tooling, it is very difficult to fix the terminal rod in the vertical direction, resulting in axial misalignment when tightening the nut; Finally, the terminal rod is positioned through the bolt 16 and the light hole 15. Due to a certain gap between the light hole and the bolt, the heights of the terminal rods cannot be flush. Utility Model Content

[0006] The purpose of the present utility model is to provide a positioning tooling for a GIS grounding switch terminal rod, which solves the technical problems in the prior art that the terminal rod positioning tooling cannot guarantee the flatness, parallelism between the terminal rods, and the inconvenience in operation when tightening the nut.

[0007] To achieve the above purpose, the technical solution of the present utility model for providing a positioning tooling for a GIS grounding switch terminal rod is as follows:

[0008] A positioning tooling for a GIS grounding switch terminal rod includes a box body. The box body has at least two sets of relatively arranged tooling surfaces, specifically, a top plate and a bottom plate, a front support plate and a rear support plate that are relatively arranged. The top plate is provided with terminal rod centering jacks, and the terminal rod centering jacks are arranged in rows. The distance between adjacent two terminal rod centering jacks is the phase spacing of the grounding switch terminal rod; The front support plate is provided with set screw holes at positions corresponding to the axes of the terminal rod centering jacks, and locking set screws are configured in the set screw holes for locking and fixing the grounding switch terminal rod; A positioning block is arranged inside the box body. The positioning block has a grounding switch terminal rod height-setting support surface for setting the height of the radial section of the terminal rod in the height direction and a grounding switch terminal rod orientation locking surface for orienting the axial section of the terminal rod in the horizontal direction.

[0009] Beneficial effects: Compared with the prior art, the utility model provides a new positioning tooling for the terminal rod of a GIS earthing switch. The positioning tooling is designed as a box structure, which has good stability during operation and can be flipped to facilitate applying torque when tightening nuts; on the top plate of the box body, there are terminal rod centering jacks that are consistent with the spacing of the earthing switch terminal rods. Using the terminal rod centering jacks to clamp and fix the earthing switch terminal rods can limit the terminal rods in the 360° direction. At the same time, by setting positioning blocks, the height of the terminal rods is supported in the height direction by the earthing switch terminal rod height-setting support surface of the positioning block and the radial section of the terminal rod, so that the terminal rods are kept at the same height. The earthing switch terminal rod orientation locking surface of the positioning block is oriented in the horizontal direction with the axial section of the terminal rod, and the terminal rod and the positioning block are locked and fixed by bolts to ensure the parallelism between each terminal rod.

[0010] Further, the cross-section of the positioning block is an inverted L-shaped structure, the top surface of its short side is the earthing switch terminal rod height-setting support surface, and the side surface perpendicular to the earthing switch terminal rod height-setting support surface is the earthing switch terminal rod orientation locking surface.

[0011] Further, the surface of the short side of the positioning block that is parallel to the earthing switch terminal rod height-setting support surface is the fast earthing switch terminal rod height-setting support surface, and the surface of the long side of the positioning block that is parallel to the earthing switch terminal rod orientation locking surface is the fast earthing switch terminal rod orientation locking surface.

[0012] Further, the adjacent two terminal rod centering jacks are radially connected.

[0013] Further, an insulating bushing is nested in the terminal rod centering jack.

[0014] Further, the insulating bushing is a self-lubricating bushing.

[0015] Further, the inner hole diameter of the insulating bushing is the diameter of the terminal rod.

[0016] Further, the insulating bushing includes an intermediate insulating bushing that matches the intermediate terminal rod centering jack and lateral insulating bushings that match the terminal rod centering jacks on both sides.

[0017] Further, the upper end of the intermediate insulating bushing has a waist-shaped retaining edge with opposite cut edges on both sides, and the upper end of the lateral insulating bushing has a C-shaped retaining edge with a cut edge on one side.

[0018] Further, the top plate, the front support plate, the bottom plate and the rear support plate are integrally formed or fixedly installed by fastening screws to form a box structure with openings at both ends. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an earthing switch in the prior art;

[0020] Figure 2 is Figure 1 the front view of the middle terminal rod;

[0021] Figure 3 is Figure 1 the top view of the middle terminal rod;

[0022] Figure 4 is Figure 1 the left view of the middle terminal rod;

[0023] Figure 5 is the structural schematic diagram of the positioning tooling for the middle terminal rod in the prior art;

[0024] Figure 6 is Figure 5 the usage state diagram of;

[0025] Figure 7 is the installation structural schematic diagram of a positioning tooling for a GIS earthing switch terminal rod and the terminal rod of the present utility model;

[0026] Figure 8 is the front view of a positioning tooling for a GIS earthing switch terminal rod of the present utility model;

[0027] Figure 9 is the top view of a positioning tooling for a GIS earthing switch terminal rod of the present utility model;

[0028] Figure 10 is the left view of a positioning tooling for a GIS earthing switch terminal rod of the present utility model;

[0029] Figure 11 is the structural schematic diagram of the top plate in the positioning tooling for the terminal rod of the present utility model;

[0030] Figure 12 is the structural schematic diagram of the first guide sleeve in the positioning tooling for the terminal rod of the present utility model;

[0031] Figure 13 is the structural schematic diagram of the second guide sleeve in the positioning tooling for the terminal rod of the present utility model;

[0032] Figure 14 is the front view of the positioning block in the positioning tooling for the terminal rod of the present utility model;

[0033] Figure 15 is the side view of the positioning block in the positioning tooling for the terminal rod of the present utility model;

[0034] Figure 16 is the usage state diagram of the earthing switch terminal rod of the present utility model;

[0035] Figure 17 This is the usage state diagram of the terminal rod of the quick earthing switch of the utility model.

[0036] In the figure: 1. Contact rod; 2. Contact finger; 3. Conductor; 4. Current-carrying busbar; 5. Earthing switch terminal rod; 6. Outdoor earthing system of gas chamber; 7. Insulating plate; 8. Sealing ring; 9. Nut; 10. Screw rod; 11. Axial section; 12. Sealing surface; 13. Threaded hole; 14. Positioning plate; 15. Screw hole; 16. Bolt; 17. Top plate; 18. Front support plate; 19. Bottom plate; 20. Rear support plate; 21. Locking set screw; 22. Intermediate insulating bushing; 23. Lateral insulating bushing; 24. Positioning block; 25. Fastening screw; 26. Centering jack hole for terminal rod; 27. Waist-shaped retaining edge; 28. C-shaped retaining edge; 29. Quick earthing switch terminal rod; 30. Height-setting support surface of earthing switch terminal rod; 31. Directional locking surface of earthing switch terminal rod; 32. Height-setting support surface of quick earthing switch terminal rod; 33. Directional locking surface of quick earthing switch terminal rod; 34. Radial section. Specific embodiments

[0037] The features and performance of the present utility model will be further described in detail below in conjunction with the embodiments.

[0038] The positioning tooling of the present utility model is mainly designed for the earthing switch terminal rod in the gas-insulated metal-enclosed switchgear. As recorded in the background art, the positioning tooling of the earthing switch terminal rod in the prior art is, for example, Figure 5 as shown, specifically a simple positioning plate. There are three light holes on the positioning plate with the same phase spacing as the earthing switch terminal rod. During use, the section threaded hole of the terminal rod and the light holes on the positioning plate are aligned and fixedly connected. Since each terminal rod is fixed at one point, it cannot ensure the parallelism between the terminal rods, thus affecting the sealing effect of the sealing ring; and it is very difficult to fix the terminal rod in the vertical direction, resulting in inconvenient nut locking operation. Secondly, through the positioning by bolts and light holes, due to the certain gap between the light holes and the bolts, the heights of the terminal rods cannot be flush.

[0039] Therefore, the present application provides a new terminal rod positioning tooling. Its main concept is: designing the positioning tooling as a box structure, opening a centering jack for the terminal rod with the same phase spacing as the earthing switch terminal rod on a tooling surface of the box structure. By fixing the terminal rod through the centering jack for the terminal rod, the terminal rod can be effectively restricted by 360°, making the terminal rods parallel to each other. Secondly, a positioning block is arranged inside the box. When the terminal rod passes through the centering jack for the terminal rod, the height-setting support surface of the positioning block inside the box and the radial section of the terminal rod support the terminal rod in the height direction to keep it flush. The directional locking surface of the positioning block and the axial section of the terminal rod are oriented in the horizontal direction, and the terminal rod and the positioning block are locked and fixed by bolts to ensure the parallelism between the terminal rods.

[0040] Based on the above main concept, the basic solution of the utility model is as follows: It includes a box body. Three terminal rod centering inserts with equal phase spacing from the terminal rod are provided on the top plate of the box body. At positions corresponding to the three terminal rod centering inserts on the side plate and near the top plate, three bolt holes are provided and bolts are configured to lock the terminal rod. A position block that can be taken out movably is arranged inside the box body. The position block has a grounding switch terminal rod height fixing support surface for fixing the height of the radial section of the terminal rod in the height direction and a grounding switch terminal rod orientation locking surface for orienting the axial section of the terminal rod in the horizontal direction.

[0041] The following is illustrated by different embodiments:

[0042] A positioning tooling for a GIS grounding switch terminal rod, as Figures 7-10 shown, includes a box body. The box body is assembled by aluminum alloy plates, and the box body structure has good stability. The box body has at least two sets of oppositely arranged tooling surfaces. The tooling surfaces are specifically the oppositely arranged top plate 17 and bottom plate 19, front support plate 18 and rear support plate 20. The top plate 17, front support plate 18, bottom plate 19 and rear support plate 20 are sequentially connected and fixed to each other. A terminal rod centering insertion hole 26 is provided on the top plate 17. The terminal rod centering insertion holes 26 are arranged in rows along the length direction of the top plate. The distance between adjacent two terminal rod centering insertion holes 26 is the phase spacing of the grounding switch terminal rod 5, which can accurately ensure the phase spacing between adjacent two terminal rods during the installation of the terminal rod. A set screw hole is provided on the front support plate 20 at a position corresponding to the axis of the terminal rod centering insertion hole 26, and a locking set screw 21 is configured in the set screw hole for locking and fixing the grounding switch terminal rod 5. A position block 24 is arranged inside the box body. The position block 24 has a grounding switch terminal rod height fixing support surface 30 for fixing the height of the radial section of the terminal rod in the height direction and a grounding switch terminal rod orientation locking surface 31 for orienting the axial section of the terminal rod in the horizontal direction. By orienting the grounding switch terminal rod orientation locking surface 31 on the position block 24 with the axial section 11 of the terminal rod, it is ensured that the axial section 11 is in the same plane. At the same time, the grounding switch terminal rod height fixing support surface 30 on the position block 24 contacts the radial section 34 of the terminal rod, which has a supporting effect on the terminal rod, making the heights of the terminal rods flush and having good parallelism between each terminal rod. By installing the grounding switch terminal rod through the above positioning tooling, it can not only accurately ensure the phase spacing between adjacent two terminal rods, but also achieve the parallelism between each terminal rod. At the same time, it ensures that the heights of the terminal rods are flush and the sections of the terminal rods are in the same plane. The box body structure is stable, and the end of the terminal rod located inside the box body is fixed by a locking set screw, with strong reliability. The box body can be flipped to facilitate applying torque to lock the nut, making the operation more convenient.

[0043] In one embodiment, the positioning block is designed as a rectangular structure. The two mutually perpendicular faces of the rectangular positioning block are respectively the height-fixed support surface 30 of the earthing switch terminal rod and the directionally locking surface 31 of the earthing switch terminal rod. Such a structural design can also achieve that the corresponding earthing switch terminal rods are flush in the height direction. At the same time, by matching the directionally locking surface 31 with the axial section and locking with the locking set screw, the axial sections of each terminal rod can be made flush, ensuring the parallelism between each terminal rod. However, the applicable range of this structure is single. Therefore, the present application provides a more optimal embodiment, as Figure 14 and 15 shown, the cross-section of the positioning block is an inverted L-shaped structure. The top surface of its short side is the height-fixed support surface of the earthing switch terminal rod, and the side surface perpendicular to the height-fixed support surface of the earthing switch terminal rod is the directionally locking surface of the earthing switch terminal rod. The surface parallel to the height-fixed support surface of the earthing switch terminal rod on the short side of the positioning block is the height-fixed support surface of the fast earthing switch terminal rod, and the surface parallel to the directionally locking surface of the earthing switch terminal rod on the long side of the positioning block is the directionally locking surface of the fast earthing switch terminal rod. In this embodiment, by designing the cross-section of the positioning block as an inverted L-shaped structure, it has both a height-fixed support surface for height direction and a directionally locking surface for orientation of the earthing switch terminal rod, as well as a height-fixed support surface for height direction and a directionally locking surface for orientation of the fast earthing switch terminal rod. Through such a structural design, the positioning tooling of the present utility model can meet the function of multi-purpose use, as Figure 16 and Figure 17 shown, when it is necessary to assemble the fast earthing switch terminal rod 29, the positioning block 24 is flipped 180 degrees, and then the assembly of the fast earthing switch terminal rod 29 can be achieved by the above method, realizing multi-purpose use and making the application range of the positioning tooling of the present utility model wider.

[0044] The present application provides a more optimal embodiment, as Figure 11 shown, the centering jacks 26 between adjacent terminal rods are radially connected. By radially connecting the centering jacks 26 of adjacent two terminal rods, it is convenient to adapt to the phase spacing between the terminal rods.

[0045] The present application provides a more optimal embodiment, as Figure 12 and Figure 13As shown, an insulating bushing is nested inside the centering jack 26 of the terminal rod. The insulating bushing is a self-lubricating bushing, and the inner hole diameter of the insulating bushing is the diameter of the terminal rod. By setting the insulating bushing in the centering jack of the terminal rod, the resistance is reduced, which facilitates the installation and removal of the terminal rod. Specifically, the insulating bushing includes an intermediate insulating bushing 22 that fits with the intermediate terminal rod centering jack and a lateral insulating bushing 23 that fits with the centering jacks of the terminal rods on both sides. The upper end of the intermediate insulating bushing 22 has a waist-shaped retaining edge 27 with opposite cut edges on both sides, and the upper end of the lateral insulating bushing 23 has a C-shaped retaining edge 28 with a cut edge on one side. Designing a retaining edge structure adapted to the structure of the centering jack 26 of the terminal rod is beneficial for installing the insulating bushing in the centering jack of the terminal rod without being affected by the insertion of the terminal rod and moving towards the inside of the box body, which has a retaining function.

[0046] In one embodiment, the box body is a hexahedron structure, and the corresponding stability requirements can also be achieved through the closed hexahedron structure. When it is necessary to apply force to tighten the nut, the box body can also be flipped, which is convenient for operation. However, since there are non-fixed positioning blocks inside the box body, in order to facilitate the taking and adjustment of the positioning blocks, the present application provides a more optimal embodiment. The top plate 17, the front support plate 18, the bottom plate 19, and the rear support plate 20 are integrally formed or fixedly installed through fastening screws 25 to form a box body structure with openings at both ends. By designing the two ends of the box body as open structures, it is convenient to adjust the position of the positioning block 24.

[0047] When the positioning tool for the terminal rod of the GIS earthing switch of the present utility model is in use, the top plate 17 of the box body is facing upwards, the bottom plate 19 is facing downwards and is attached to the workbench. Then, one end of the earthing switch terminal rod 5 with the screw 10 is facing upwards, and the other end passes through the insulating bushing. The stepped surface of the earthing switch terminal rod 5 lands on the earthing switch terminal rod height-setting support surface 30 on the positioning block 24, ensuring that the earthing switch terminal rods 5 are at the same height and the cut surfaces are on the same plane. At the same time, the earthing switch terminal rods 5 are parallel to each other. At this time, tighten the locking set screw 21, and the locking set screw 21 abuts against the earthing switch terminal rod 5, so that the axial cut surface 11 is locked and fixed with the earthing switch terminal rod directional locking surface on the positioning block 24, ensuring that the cut surfaces are on the same plane. After that, the sealing ring 8, the insulating plate 7, and the nut 9 can be installed. First, pre-tighten the nut 9, and then flip the box body of the tool together with the earthing switch terminal rod 5 by 90 degrees, so that the rear support plate 20 is facing downwards and is attached to the workbench for the tightening operation of the nut 9.

[0048] The above is only the 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 is subject to the claims. All equivalent structural changes made by using the description and drawings of the present utility model should be included in the protection scope of the present utility model by the same token.

Claims

1. A positioning tooling for the terminal rod of a GIS earthing switch, characterized in that It includes a box body which has at least two sets of tooling surfaces arranged oppositely. The tooling surfaces are specifically the oppositely arranged top plate and bottom plate, front support plate and rear support plate. A terminal rod centering jack is provided on the top plate, and the terminal rod centering jacks are arranged in rows. The distance between adjacent terminal rod centering jacks is the phase spacing of the earthing switch terminal rod. A set screw hole is provided on the front support plate at a position corresponding to the axis of the terminal rod centering jack, and a locking set screw is arranged in the set screw hole for locking and fixing the earthing switch terminal rod. A positioning block is arranged inside the box body. The positioning block has a earthing switch terminal rod height fixing support surface for fixing the height of the radial section of the terminal rod in the height direction and a earthing switch terminal rod orientation locking surface for orienting the axial section of the terminal rod in the horizontal direction.

2. The positioning tooling for the GIS earthing switch terminal pole according to claim 1, characterized in that, The cross-section of the positioning block is an inverted L-shaped structure. The top surface of its short side is the earthing switch terminal rod height fixing support surface, and the side surface perpendicular to the earthing switch terminal rod height fixing support surface is the earthing switch terminal rod orientation locking surface.

3. The positioning tooling for the GIS grounding switch terminal pole according to claim 2, characterized in that, The surface parallel to the earthing switch terminal rod height fixing support surface on the short side of the positioning block is the fast earthing switch terminal rod height fixing support surface, and the surface parallel to the earthing switch terminal rod orientation locking surface on the long side of the positioning block is the fast earthing switch terminal rod orientation locking surface.

4. The positioning tooling for the GIS earthing switch terminal rod according to any one of claims 1-3, characterized in that, Adjacent terminal rod centering jacks are radially connected.

5. The positioning tooling for the GIS earthing switch terminal pole according to any one of claims 1-3, characterized in that, An insulating bushing is nested in the terminal rod centering jack.

6. The positioning tooling for the GIS earthing switch terminal rod according to claim 5, characterized in that, The insulating bushing is a self-lubricating bushing.

7. The positioning tooling for the GIS earthing switch terminal rod according to claim 6, characterized in that, The inner hole diameter of the insulating bushing is the diameter of the terminal rod.

8. The positioning tooling for the GIS grounding switch terminal rod according to claim 7, characterized in that, The insulating bushing includes an intermediate insulating bushing matched with the intermediate terminal rod centering jack and lateral insulating bushings matched with the terminal rod centering jacks on both sides.

9. The positioning tooling for the GIS earthing switch terminal pole according to claim 8, characterized in that, The upper end of the intermediate insulating bushing has a waist-shaped retaining edge with opposite cut edges on both sides, and the upper end of the lateral insulating bushing has a C-shaped retaining edge with a cut edge on one side.

10. The positioning tooling for the GIS earthing switch terminal rod according to any one of claims 1-3, characterized in that, The top plate, front support plate, bottom plate and rear support plate are integrally formed or fixedly installed by fastening screws to form a box body structure with openings at both ends.

Images