Shielding piece and shielding assembly for GIS voltage withstanding experiment

Abstract

The utility model relates to the field of shielding devices for preventing electric fields, in particular to a shielding piece and a shielding assembly for a GIS (Gas Insulated Switchgear) withstand voltage experiment. The shielding piece and the shielding assembly for the GIS voltage withstanding experiment are used for solving the problems that an existing shielding piece is complex in operation and low in assembling and disassembling efficiency during assembling and disassembling. The shielding piece for the GIS voltage withstanding experiment comprises a shielding body and a conductive inserting section used for being inserted in a conductor inserting hole, a stopping ring face used for stopping the hole edge of the conductor inserting hole is arranged between the conductive inserting section and the shielding body, and a connecting hole used for being connected with a threaded hole of a shielding piece on the opposite side is formed in the conductive inserting section. The shielding main body is provided with avoiding holes which correspond to the connecting holes and are used for realizing dismounting operation, and the aperture of the avoiding holes is larger than that of the connecting holes. According to the utility model, the connecting bolt passes through the avoiding hole, enters the connecting hole and is matched with the threaded hole of the shielding piece on the opposite side, so that the two shielding pieces can be mounted or dismounted on the cross-shaped conductor at the same time only by screwing the connecting bolt, the operation steps are saved, and the dismounting and mounting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of shielding devices for preventing electric fields, and in particular to a shielding component and shielding assembly for GIS withstand voltage testing. Background Technology

[0002] GIS (Gas Insulated Metal-Enclosed Switchgear) is a type of high-voltage electrical equipment characterized by high compactness, high reliability, and high safety. One existing type of GIS equipment has the following features: Figure 1 The structure shown has a voltage transformer 1 at the top, a surge arrester 2 at the bottom, and the GIS main body (including circuit breakers, three-position switches, etc.) on one of the left and right sides, while the other side has a terminal block (wiring bushing or cable connection port). To connect these four components, a cross-shaped conductor 5 is typically used. The upper part of the cross-shaped conductor 2 is connected to the voltage transformer 1 via an upper conductor 3, and the lower part of the cross-shaped conductor 2 is connected to the surge arrester 2 via a lower conductor 4, thus achieving the electrical connection of the various components of the GIS.

[0003] Before being put into use, GIS typically undergoes a withstand voltage test. During this test, the upper conductor 3 and voltage transformer 1 of the cross-shaped conductor 2, as well as the lower conductor 4 and surge arrester 2 of the cross-shaped conductor 2, must be removed. Withstand voltage covers are installed at the upper and lower ports of the four-way casing outside the cross-shaped conductor 2. Because the abrupt shape of the conductor sockets at the upper and lower parts of the cross-shaped conductor 2 makes them prone to discharge, shielding components must be installed inside the upper and lower conductor sockets. These shielding components have a spherical outer shielding body and conductive insertion sections for insertion into the sockets of the cross-shaped conductor 2. To secure the shielding components to the cross-shaped conductor 2, connecting holes are typically provided radially along the conductive insertion sections, and mounting holes are provided at corresponding positions on the cross-shaped conductor 2. During installation, the connecting holes and mounting holes must be aligned, and screws are used to install both. Both the upper and lower shielding components require separate installation and removal, making the operation complex and disassembly difficult, thus reducing installation and disassembly efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a shielding component for GIS pressure withstand testing, thereby solving the problems of complex operation and low efficiency in the assembly and disassembly of existing shielding components. Another purpose of this invention is to provide a shielding assembly for GIS pressure withstand testing, thereby solving the problems of complex operation and low efficiency in the assembly and disassembly of existing shielding components.

[0005] The shielding component for GIS pressure resistance testing according to this utility model adopts the following technical solution:

[0006] The shielding component for GIS withstand voltage testing includes a shielding body and a conductive insert section for insertion into a conductor socket. The conductive insert section and the shielding body have a stop ring surface for engaging with the hole edge of the conductor socket. The conductive insert section has a connecting hole for connecting with a corresponding threaded hole of the shielding component on the opposite side. The shielding body has a clearance hole corresponding to the connecting hole for allowing operators to perform disassembly and assembly operations. The diameter of the clearance hole is larger than the diameter of the connecting hole.

[0007] Furthermore, the connecting hole is located at the center of the conductive insert section, and the clearance hole is coaxially arranged with the connecting hole.

[0008] Furthermore, the edge of the clearance hole has a rounded corner structure.

[0009] This utility model proposes an improved technical solution to address the aforementioned technical problems. It involves providing clearance holes and connection holes on the shielding body and conductive insertion section of the shielding component, respectively. A connecting bolt passes through the axial connection hole of the shielding component and connects to the axial threaded hole of the opposite shielding component. After the connecting bolt is installed, the connection of the two shielding components can be reliably achieved. This connection method allows for the simultaneous installation or removal of both shielding components on the cross-shaped conductor simply by tightening the connecting bolt, saving operation steps, simplifying assembly and disassembly operations, and improving efficiency.

[0010] Another aspect of this utility model provides another shielding component for GIS withstand voltage testing. The shielding component for GIS withstand voltage testing includes a shielding body and a conductive insert section for insertion into a conductor socket. The conductive insert section and the shielding body have a stop ring surface for engaging with the hole edge of the conductor socket. The conductive insert section is provided with a threaded hole for connecting with a corresponding connection hole of the shielding component on the opposite side.

[0011] Furthermore, the threaded hole is a blind hole.

[0012] Furthermore, the shielding body is provided with an anti-rotation locking structure that prevents the conductive insert section from rotating when the connecting bolt, which is inserted into the connecting hole of the opposite shielding component, is screwed into the threaded hole.

[0013] Furthermore, the anti-rotation locking structure is an anti-rotation locking groove provided on the shielding body.

[0014] Furthermore, the anti-rotation slot is perpendicular to the axis of the conductive insert section.

[0015] Furthermore, the anti-rotation slot is positioned close to the conductive insertion section.

[0016] This invention proposes an improved technical solution to address the aforementioned technical problems. A threaded hole is provided on the conductive insertion section of the shielding component for connection with the corresponding connection hole of the opposite shielding component. The connecting bolt passes through the axial clearance hole and the connection hole of the opposite shielding component and then connects to the threaded hole of this shielding component, reliably achieving the connection between the two shielding components. This connection method allows for the simultaneous installation or removal of both shielding components on the cross-shaped conductor simply by tightening the connecting bolt, saving operational steps, simplifying assembly and disassembly operations, and improving efficiency.

[0017] Another aspect of this utility model provides a shielding assembly for GIS withstand voltage testing. This withstand voltage test shield includes two shielding components arranged opposite each other. One shielding component includes a shielding body and a conductive insert section for insertion into a conductor socket. A stop ring surface between the conductive insert section and the shielding body is provided for engagement with the edge of the conductor socket. The conductive insert section has a connecting hole for connection with a corresponding threaded hole of the opposite shielding component. The shielding body has a clearance hole corresponding to the connecting hole for allowing operators to perform assembly and disassembly operations. The diameter of the clearance hole is larger than the diameter of the connecting hole. The other shielding component includes a shielding body and a conductive insert section for insertion into a conductor socket. A stop ring surface between the conductive insert section and the shielding body is provided for engagement with the edge of the conductor socket. The conductive insert section has a threaded hole for connection with a corresponding connecting hole of the opposite shielding component. When the two shielding components are installed on a cross-shaped conductor, the stop ring surfaces of the two shielding components contact the edge of the corresponding conductor socket, and the end faces of the conductive insert sections of the two shielding components are in contact.

[0018] Furthermore, the connecting hole is located at the center of the conductive insert section, and the clearance hole is coaxially arranged with the connecting hole.

[0019] Furthermore, the edge of the clearance hole has a rounded corner structure.

[0020] Furthermore, the threaded hole is a blind hole.

[0021] Furthermore, the shielding body is provided with an anti-rotation locking structure that prevents the conductive insert section from rotating when the connecting bolt, which is inserted into the connecting hole of the opposite shielding component, is screwed into the threaded hole.

[0022] Furthermore, the anti-rotation locking structure is an anti-rotation locking groove provided on the shielding body.

[0023] Furthermore, the anti-rotation slot is perpendicular to the axis of the conductive insert section.

[0024] Furthermore, the anti-rotation slot is positioned close to the conductive insertion section.

[0025] This utility model proposes a novel technical solution to address the aforementioned technical problems. In one of the two opposing shielding components, clearance holes and connecting holes are respectively provided on the shielding body and conductive insert section. A threaded hole is provided on the conductive insert section of the opposite shielding component. A connecting bolt passes through the axial connecting hole of the shielding component and connects to the axial threaded hole of the opposite shielding component. After the connecting bolt is installed, the two shielding components can be reliably connected. This connection method allows for the simultaneous installation or removal of both shielding components on the cross-shaped conductor simply by tightening the connecting bolt, saving operational steps, simplifying assembly and disassembly operations, and improving efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the GIS equipment.

[0027] Figure 2 This is a schematic diagram of the structure of the shielding component for the GIS withstand voltage test of this utility model installed on a cross-shaped conductor.

[0028] In the diagram: 1. Voltage transformer; 2. Surge arrester; 3. Upper conductor; 4. Lower conductor; 5. Cross-shaped conductor; 6. First shield; 61. Shield body; 611. Clearance hole; 62. Conductive insertion section; 621. Connection hole; 7. Second shield; 71. Anti-rotation slot; 72. Threaded hole; 8. Pressure-resistant cover plate; 9. Contact finger; 10. Connecting bolt. Detailed Implementation

[0029] This utility model proposes an improved technical solution to address the aforementioned technical problems. The core concept of this utility model is as follows: In one of the two opposing shielding components, a clearance hole and a connecting hole are respectively provided on the shielding body and the conductive insert section. A threaded hole is provided on the conductive insert section of the opposite shielding component. A connecting bolt passes through the axial connecting hole of the shielding component and connects to the axial threaded hole of the opposite shielding component. After the connecting bolt is installed, the connection of the two shielding components can be reliably achieved. This connection method only requires tightening the connecting bolt to simultaneously install or remove the two shielding components on the cross-shaped conductor, saving operation steps, simplifying assembly and disassembly operations, and improving assembly and disassembly efficiency.

[0030] Regarding the above concept, such as Figure 2As shown, a shielding component for GIS withstand voltage testing (referred to as the first shielding component 6) of this utility model includes a shielding body 61 and a conductive insertion section 62 for insertion into a conductor socket. In this embodiment, the outer contour of the shielding body 61 is hemispherical, and the conductive insertion section 62 is columnar. Two annular contact finger grooves are arranged at intervals along the axial direction within the conductor socket where the cross-shaped conductor 5 is inserted into the shielding component. Contact fingers 9 are installed in the contact finger grooves. When the conductive insertion section 62 is inserted into the cross-shaped conductor, its outer wall surface contacts the contact fingers 9, thereby achieving electrical connection between the shielding component and the cross-shaped conductor 5. A stop ring surface is provided between the conductive insertion section 62 and the shielding body 61 for engagement with the hole edge of the conductor socket, facilitating axial positioning of the shielding component. The conductive insertion section 62 is provided with a connection hole 621 for connecting to a corresponding threaded hole 72 of the opposite shield (referred to as the second shield 7). The shield body 61 is provided with a clearance hole 611 corresponding to the connection hole 621 for allowing operators to perform disassembly and assembly operations. The diameter of the clearance hole 611 is larger than that of the connection hole 621, so that the connecting bolt 10 can pass through the clearance hole 611 of the first shield 6 and enter the connection hole 621. Its screw part extends out of the connection hole 621 and connects with the threaded hole 72 of the second shield 7 on the opposite side, thereby realizing the installation and fixation of the two shields. This connection method only requires tightening the connecting bolt 10 to simultaneously install or remove the two shields on the cross-shaped conductor 5. Compared with the connection method of using screws to radially pass through the connection holes and mounting holes on the shield and the cross-shaped conductor 5, it saves operation steps, simplifies disassembly and assembly operations, and improves disassembly and assembly efficiency.

[0031] In this embodiment, the connecting hole 621 is located at the center of the conductive insert section 62, and the clearance hole 611 is coaxially arranged with the connecting hole 621. The centrally located connecting hole 621 is easier to process than an eccentrically located connecting hole 621, and it also avoids assembly errors caused by the eccentricity of the connecting hole 621 and the threaded hole 72 when installing with the second shielding member 7 on the opposite side. Simultaneously, the connecting bolt 10 can be positioned at the center of the two shielding members to connect them, resulting in uniform force distribution on both shielding members after installation. Furthermore, in other embodiments, the connecting hole may not be located at the center of the conductive insert section; that is, the connecting hole can be eccentrically located on the conductive insert section of the first shielding member, but it must be ensured that the connecting hole on the first shielding member corresponds to the threaded hole 72 on the second shielding member on the opposite side. The coaxial arrangement of the clearance hole 611 and the connecting hole 621 simplifies the processing of the clearance hole 611 and facilitates the installation and removal of the connecting bolt 10. Of course, in another embodiment, the clearance hole and the connecting hole can also be set out of axis. It is only necessary to ensure that the clearance hole can avoid the connecting bolt so that the connecting bolt can pass through the clearance hole and enter the connecting hole, and at the same time, the bolt head of the connecting bolt can be blocked by the stepped surface at the connection between the clearance hole and the connecting hole.

[0032] In this embodiment, the edge of the clearance hole 611 is rounded. If the edge of the clearance hole 611 is not rounded, that is, the edge of the clearance hole 611 is an edge structure, the edge is prone to forming a sharp point in the electric field, which will produce a point discharge phenomenon and affect the experimental data of the GIS withstand voltage test. The rounded corner structure improves the accuracy of the GIS withstand voltage test.

[0033] Another aspect of this utility model provides a shielding component for GIS withstand voltage testing (i.e., a second shielding component 7). This shielding component includes a shielding body and a conductive insert section for insertion into a conductor socket. The conductive insert section and the shielding body have a stop ring surface for engagement with the hole edge of the conductor socket. Since the structure of the conductive insert section and the shielding body of the second shielding component 7 is similar to that of the first shielding component 6, it will not be described in detail here. The conductive insert section 62 is provided with a threaded hole 72 for connection with a corresponding connecting hole 621 of the first shielding component 6 on the opposite side. Thus, the second shielding component 7 can be connected to the first shielding component 6 on the opposite side via connecting bolts 10. Tightening the connecting bolts simultaneously achieves the installation and fixation of both shielding components, saving operation steps, simplifying disassembly and assembly operations, and improving disassembly and assembly efficiency.

[0034] In this embodiment, the threaded hole 72 is a blind hole. This reduces the impact of the threaded hole 72 on the structural strength of the second shielding member 7. Furthermore, in other embodiments, the threaded hole 72 may also be a through hole.

[0035] In one embodiment, when screwing the connecting bolt into the threaded hole, the second shield 7 is manually held to prevent it from rotating. In this embodiment, the shielding body is provided with an anti-rotation locking structure that prevents the conductive insert section from rotating when the connecting bolt 10, which passes through the connecting hole 621 of the opposite shield, is screwed into the threaded hole 72. Without this anti-rotation locking structure, the second shield 7 may rotate along with the connecting bolt 10 due to friction when it is screwed in or out, making it difficult to connect or disassemble the two shields. Therefore, in this embodiment, an anti-rotation locking structure is provided on the second shield 7 to fix it circumferentially, allowing the connecting bolt 10 to be screwed in normally, thereby efficiently connecting and disassembling the two shields.

[0036] In this embodiment, the anti-rotation locking structure is an anti-rotation locking groove 71 provided on the shielding body. The anti-rotation locking groove 71 has a simple structure and is easy to manufacture. By inserting a stop rod into the anti-rotation locking groove 71 and cooperating with the anti-rotation locking groove 71, the circumferential fixation of the second shielding member 7 can be reliably achieved.

[0037] In this embodiment, the anti-rotation groove 71 is perpendicular to the axis of the conductive insert segment. Thus, the stop rod can prevent the conductive insert segment from rotating in a direction perpendicular to its axis, resulting in a good anti-rotation effect. Furthermore, in other embodiments, the anti-rotation groove 71 can also be set at a certain angle to the direction perpendicular to the axis of the conductive insert segment. It is readily conceivable that the anti-rotation groove can also be set parallel to the axis of the conductive insert segment, as long as it can cooperate with the guide rod to prevent the conductive insert segment from rotating. When the anti-rotation groove is coaxial with the axis of the conductive insert segment, the anti-rotation groove can be selected with a non-circular cross-section such as an internal hexagonal groove, so that it can cooperate with the wrench to prevent rotation through its shape.

[0038] In this embodiment, the anti-rotation slot 71 is positioned close to the conductive insertion section. This reduces the impact of the anti-rotation slot 71 on the shielding effect of the shielding body, improving the accuracy of the withstand voltage test. Furthermore, in other embodiments, the anti-rotation slot 71 may be positioned away from the conductive insertion section.

[0039] Another aspect of this utility model provides a shielding assembly for GIS withstand voltage testing. This shielding assembly includes a first shielding member 6 and a second shielding member 7. One of the two shielding members is the first shielding member 6 described above, and the other is the second shielding member 7 described above. When the two shielding members are installed on the cross-shaped conductor 5, the stop ring surfaces of the two shielding members respectively contact the edge of the corresponding conductor insertion hole, and the end faces of the conductive insertion sections of the two shielding members are in contact. Since the first shielding member is the same as the embodiment of the first shielding member 6 described above, and the second shielding member is the same as the embodiment of the second shielding member 7 described above, it will not be described again here.

[0040] The above description is only a 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 shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A shielding component for GIS withstand voltage testing, comprising a shielding body and a conductive insertion section for insertion into a conductor socket, wherein the conductive insertion section and the shielding body have a stop ring surface for engaging with the hole edge of the conductor socket, characterized in that, The conductive insert section is provided with a connection hole for connecting with the corresponding threaded hole of the shielding component on the opposite side. The shielding body is provided with a clearance hole corresponding to the connection hole for the operator to perform disassembly and assembly operations. The diameter of the clearance hole is larger than the diameter of the connection hole.

2. The shielding component for GIS withstand voltage test according to claim 1, characterized in that, The connection hole is located at the center of the conductive insertion section, and the clearance hole is coaxially arranged with the connection hole.

3. The shielding component for GIS withstand voltage testing according to claim 1 or 2, characterized in that, The edge of the clearance hole has a rounded corner structure.

4. A shielding component for GIS withstand voltage testing, comprising a shielding body and a conductive insertion section for insertion into a conductor socket, wherein the conductive insertion section and the shielding body have a stop ring surface for engaging with the edge of the conductor socket, characterized in that, The conductive insert section is provided with threaded holes for connecting with corresponding connection holes of the shielding component on the opposite side.

5. The shielding component for GIS withstand voltage testing according to claim 4, characterized in that, The threaded hole is a blind hole.

6. The shielding component for GIS withstand voltage testing according to claim 4 or 5, characterized in that, The shielding body is provided with an anti-rotation locking structure that prevents the conductive insert section from rotating when the connecting bolt, which is inserted into the connecting hole of the opposite shielding component, is screwed into the threaded hole.

7. The shielding component for GIS withstand voltage testing according to claim 6, characterized in that, The anti-rotation locking structure is an anti-rotation locking groove set on the shielding body.

8. The shielding component for GIS withstand voltage testing according to claim 7, characterized in that, The anti-rotation slot is perpendicular to the axis of the conductive insertion section.

9. The shielding component for GIS withstand voltage testing according to claim 8, characterized in that, The anti-rotation slot is positioned close to the conductive insertion section.

10. A shielding assembly for GIS withstand voltage testing, comprising two opposing shielding components, characterized in that, One of the two shielding components is the shielding component according to any one of claims 1-3, and the other is the shielding component according to any one of claims 4-9. When the two shielding components are installed on the cross-shaped conductor, the stop ring surfaces of the two shielding components are in contact with the hole edges of the corresponding conductor insertion holes, and the end faces of the conductive insertion sections of the two shielding components are in contact.

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