GIS bus unit and GIS bus packaging body

Abstract

The utility model relates to a gas insulated switchgear, and especially relates to a GIS bus unit and a GIS bus packaging body. The GIS bus packaging body comprises at least one section of GIS bus unit, the GIS bus unit comprises an electric connector and a conducting rod, two ends of the electric connector are provided with connecting sections internally provided with spring contact fingers, the connecting sections extend out of a connecting plate along the radial direction of the conducting rod, the conducting rod and the electric connector are fixedly connected through a fixing bolt, the wall of the electric connector is provided with an operating hole, and the operating hole is communicated with the conducting rod. An insulation structure is arranged between the electric connector and the end face of the conducting rod and the fixing bolt, the adjacent GIS bus units are electrically connected through the conducting rod in an inserted mode so as to achieve through-flow, the adjacent bus cylinders are coaxially and fixedly connected, cover plates for completely sealing the end faces are installed at the two ends of the GIS bus packaging body, and on the premise that the fixing structure is not dismantled, the GIS bus packaging body can be installed on the GIS bus packaging body. The device can be directly connected to an electric field, facilitates on-site installation, and prevents normal operation from being affected by a diversion channel formed by virtual connection.

Description

Technical Field

[0001] This utility model relates to a gas-insulated switchgear, and more particularly to a GIS busbar unit and a GIS busbar package. Background Technology

[0002] With the rapid development of the national economy and the power industry, the power grid has become increasingly large. Gas-insulated switchgear (GIS) has been widely used in substations in recent years due to its advantages such as less susceptibility to external environmental influences, less need for frequent maintenance, and smaller footprint. GIS equipment refers to the optimized and organic combination of primary equipment in a substation, excluding transformers, including busbars, circuit breakers, disconnect switches, grounding switches, voltage transformers, current transformers, surge arresters, cable terminals, and incoming / outgoing bushings, sealed in a container filled with sulfur hexafluoride gas for insulation. A typical GIS busbar consists of an insulated and sealed busbar cylinder containing conductive rods that act as current-carrying conductors. The busbar cylinder is filled with sulfur hexafluoride gas as an insulating gas. Post insulators are installed on the inner wall of the busbar for support and limitation. The post insulators have electrical connections along the axial direction of the busbar cylinder, with spring contacts at both ends. Adjacent conductive rods are connected and current flows through the spring contacts of the electrical connections. The conductive rods and the busbar cylinder are connected and current flows through the spring contacts located on the end caps. The conductive rods and electrical connections together constitute the internal current-guiding structure of the GIS busbar.

[0003] Currently, the common transportation method for GIS busbars is to transport the busbar cylinder and conductor rods separately. This method helps to protect the structural integrity of each part and avoid collisions and friction between the conductor rod and the cylinder during transportation. However, it requires a high level of cleanliness for the inside of the busbar cylinder and the surface of the conductor during operation. It is inevitable that the busbar will get contaminated with debris during transportation, and it needs to be cleaned before assembly, which increases the installation process. In addition, the on-site operating environment is complex and can easily damage the conductor rod.

[0004] Chinese invention patent CN112688260B, authorized on June 20, 2023, discloses a busbar cylinder encapsulation device. A cover plate for sealing the end of the busbar cylinder is installed at the end of the cylinder. The cover plate has a fixing rod for axial and radial limiting of the conductive rod, and the fixing rod and the conductive rod are threaded together. This structure allows for integrated transportation of the busbar cylinder and the conductive rod. However, in this design, only one end of the conductive rod is fixed to the busbar cylinder encapsulation device, and the other end is plugged into the electrical connection. For longer busbars, which are typically composed of multiple connected conductive rods, it is impossible to axially fix all the conductive rods. Unfixed conductive rods can still move and cause damage. Furthermore, the fixing structure needs to be disassembled before on-site assembly, increasing the on-site installation process.

[0005] Chinese invention patent application CN118213919A, published on June 18, 2024, discloses an axial limiting device and a fixing structure for a conductive rod. During transportation, the conductive rod is assembled and installed inside a busbar cylinder. An end cap is provided at the end of the wooden box cylinder, and a cylindrical structure for inserting the conductive rod extends into the busbar cylinder from the end cap. A fastening rod extending into the busbar cylinder is fixedly installed at the center of the end cap. The fastening rod has an elastic element and pressure seats on both sides at the rod body corresponding to the insertion position of the conductive rod on the end cap. The pressure seats compress the elastic element to cause radial deformation, thereby fixing the conductive rod, end cap, and busbar cylinder relatively, preventing collisions during transportation. Simultaneously, the conductive rod is axially restricted, preventing it from shifting during transportation and generating metal particles or damaging the silver plating layer of the contacts, thus affecting insulation performance. However, the fixed structure needs to be disassembled before on-site assembly, which increases the on-site installation process. In addition, this structure is only applicable to busbar structures that are fixed at one end and have only one conductive rod inside. For longer busbar cylinders, the inside is usually composed of multiple conductive rods connected together, and it is impossible to fix all the conductive rods axially. The unfixed conductive rods will still move and cause damage. Utility Model Content

[0006] The purpose of this utility model is to provide a GIS bus unit to solve the problems of limited applicability of the integrated GIS bus transportation structure and the need to disassemble the fixing structure before assembly.

[0007] The purpose of this utility model is also to provide a GIS busbar encapsulation body to solve the above-mentioned problems.

[0008] The technical solution of the GIS busbar unit of this utility model is as follows:

[0009] A GIS busbar unit includes an electrical connection and a conductive rod. The electrical connection has connecting sections at both ends. Spring contacts for connecting the conductive rod are fixedly installed inside the connecting sections. A connecting plate extends radially from the inner wall of the connecting section to fix the conductive rod. The connecting plate has bolt holes parallel to the axial direction of the conductive rod. A threaded hole is opened at one end of the conductive rod corresponding to the bolt holes. The conductive rod and the electrical connection are fixedly connected by fixing bolts. The wall of the electrical connection has operating holes for installing the fixing bolts. An insulating structure is provided between the electrical connection, the end face of the conductive rod, and the fixing bolts to prevent loose connections and the formation of a conductive path.

[0010] Furthermore, the insulation structure includes an insulating guide ring disposed between the connecting plate and the corresponding conductive rod end face, an insulating gasket disposed between the bolt head of the fixing bolt and the connecting plate, and an insulating sleeve disposed between the bolt shank of the fixing bolt and the bolt hole.

[0011] Furthermore, the end face of the conductive rod that contacts the insulating guide ring has an annular groove corresponding to the insulating guide ring.

[0012] Furthermore, at least two threaded holes are provided on the same end face of the conductive rod, evenly distributed on a circle centered on the center of the end face of the conductive rod.

[0013] Beneficial Effects: This utility model is an improved invention. The GIS busbar unit of this utility model includes an electrical connection and a conductive rod. Connecting sections are provided at both ends of the electrical connection. Spring contacts for connecting the conductive rod are fixedly installed inside the connecting sections, ensuring stable and reliable current flow. A connecting plate extends radially from the inner wall of the connecting section to fix the conductive rod. Bolt holes parallel to the axial direction of the conductive rod are provided on the connecting plate. A threaded hole is opened at one end of the conductive rod corresponding to the bolt hole. The conductive rod and the electrical connection are fixedly connected by fixing bolts, achieving axial and radial limiting of the conductive rod. Operating holes for installing fixing bolts are provided on the wall of the electrical connection to prevent axial movement and radial runout of the conductive rod during transportation. An insulating structure is provided between the electrical connection, the end face of the conductive rod, and the fixing bolts to avoid loose connections forming a current-carrying path. The current-carrying path of the contacts is not changed. It can be directly connected to an electric field without removing the fixing structure, facilitating on-site installation and avoiding loose connections forming a current-carrying path that would affect normal operation.

[0014] The technical solution of this utility model's GIS busbar encapsulation body is as follows:

[0015] A GIS busbar enclosure includes at least one GIS busbar unit. Each GIS busbar unit includes an electrical connection and a conductive rod. Connecting sections are provided at both ends of the electrical connection. Spring contacts for connecting the conductive rod are fixedly installed inside the connecting sections. A connecting plate extends radially from the inner wall of the connecting section to fix the conductive rod. Bolt holes parallel to the axial direction of the conductive rod are provided on the connecting plate. A threaded hole is opened at one end of the conductive rod corresponding to the bolt holes. The conductive rod and the electrical connection are fixedly connected by fixing bolts. Operating holes for installing fixing bolts are provided on the wall of the electrical connection. An insulating structure is provided between the electrical connection, the end face of the conductive rod, and the fixing bolts to prevent loose connections and the formation of a current-carrying path. Electrical connections are inserted into adjacent GIS busbar units via conductive rods to achieve current flow. Adjacent busbar cylinders are coaxially fixedly connected. Cover plates that completely seal the end faces are installed at both ends of the GIS busbar enclosure.

[0016] Furthermore, the insulation structure includes an insulating guide ring disposed between the connecting plate and the corresponding conductive rod end face, an insulating gasket disposed between the bolt head of the fixing bolt and the connecting plate, and an insulating sleeve disposed between the bolt shank of the fixing bolt and the bolt hole.

[0017] Furthermore, the end face of the conductive rod that contacts the insulating guide ring has an annular groove corresponding to the insulating guide ring.

[0018] Furthermore, at least two threaded holes are provided on the same end face of the conductive rod, evenly distributed on a circle centered on the center of the end face of the conductive rod.

[0019] Furthermore, the cover plate provided on the end of the busbar cylinder at the end where the conductive rod extends is a convex cover plate, and the convex cover plate extends outward by a protrusion to form a cavity inside that cooperates with the conductive rod, while the cover plate at the other end is a flat cover plate.

[0020] Furthermore, flange connections are used between adjacent busbar cylinders and between the busbar cylinder and the cover plate.

[0021] Beneficial Effects: This utility model's GIS busbar encapsulation is an improved invention. The GIS busbar encapsulation includes at least one GIS busbar unit, which includes an electrical connection and a conductive rod. Connecting sections are provided at both ends of the electrical connection. Spring contacts for connecting the conductive rod are fixedly installed inside the connecting sections, ensuring stable and reliable current flow. A connecting plate extends radially from the inner wall of the connecting section to fix the conductive rod. The connecting plate has bolt holes parallel to the axial direction of the conductive rod. A threaded hole is opened at one end of the conductive rod corresponding to the bolt holes. The conductive rod and the electrical connection are fixedly connected by fixing bolts, achieving axial and radial limiting of the conductive rod. Operating holes for installing fixing bolts are provided on the wall of the electrical connection, preventing... To prevent axial movement and radial runout of the conductive rod during transportation, an insulating structure is provided between the electrical connection and the end face of the conductive rod, as well as the fixing bolts, to avoid the formation of a conductive path due to a loose connection. This does not change the current contact path. Adjacent GIS busbar units are connected by inserting conductive rods into the electrical connection to achieve current flow. Adjacent busbar cylinders are coaxially fixedly connected to ensure the overall coaxiality of the busbar and good insulation performance. Both ends of the GIS busbar enclosure are equipped with cover plates that completely seal the end faces to prevent foreign objects from entering the busbar during transportation. It can be directly connected to the electric field without removing the fixing structure, which is convenient for on-site installation and avoids the formation of a conductive path due to a loose connection that may affect normal operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of one embodiment of the GIS busbar encapsulation body of this utility model;

[0023] Figure 2 for Figure 1 A partial enlarged view of the connection between the conductive rod and the electrical connection;

[0024] Figure 3 for Figure 1 Side view of the central conductive rod;

[0025] Figure 4 for Figure 1 A partial cross-sectional view of the central conductive rod.

[0026] In the diagram: 1. Convex cover plate; 2. Busbar cylinder; 3. Conductor rod; 4. Spring contact finger; 5. Electrical connection; 6. Post insulator; 7. Flat cover plate; 8. Insulating guide ring; 9. Insulating pad; 10. Threaded hole; 11. Operating hole; 12. Fixing bolt; 13. Connecting plate; 14. Insulating sleeve. Detailed Implementation

[0027] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0028] Integrated transportation of GIS busbars requires that the conductive rod and the busbar cylinder remain relatively stationary to prevent damage or increased assembly procedures caused by movement. However, existing fixing structures all require removal before assembly. The inventive concept of this utility model is to design a conductive rod fixing structure that does not affect the normal operation of the GIS busbar, thereby ensuring the integrity of the overall structure during integrated transportation of the GIS busbar, preventing the generation of metal particles and damage to the surface silver plating layer, and eliminating the need for disassembly during assembly.

[0029] The specific implementation method of the GIS bus unit of this utility model is as follows:

[0030] Based on the above ideas, such as Figure 1 , 2 As shown, in a basic embodiment, the GIS busbar unit of this utility model includes an electrical connection 5 and a conductive rod 3. Connecting sections are provided at both ends of the electrical connection 5. Spring contacts 4 for connecting the conductive rod 3 are fixedly installed inside the connecting sections to ensure stable and reliable current flow. A connecting plate 13 extends radially from the inner wall of the connecting section to fix the conductive rod 3. Bolt holes parallel to the axial direction of the conductive rod 3 are provided on the connecting plate 13. A threaded hole 10 is opened at one end of the conductive rod 3 at a position corresponding to the bolt hole. The conductive rod 3 and the electrical connection 5 are fixedly connected by fixing bolts 12, achieving axial and radial limiting of the conductive rod 3. Operating holes 11 for installing fixing bolts are provided on the wall of the electrical connection 5 to prevent axial movement and radial jump of the conductive rod 3 during transportation. An insulating structure is provided between the electrical connection 5, the end face of the conductive rod 3, and the fixing bolts 12 to avoid the formation of a conductive path due to a loose connection. This does not change the current flow path of the contacts. Without removing the fixing structure, it can be directly connected to an electric field, facilitating on-site installation and avoiding the formation of a conductive path due to a loose connection that could affect normal operation.

[0031] In a preferred embodiment, the insulating structure includes an insulating guide ring 8 disposed between the connecting plate 13 and the corresponding end face of the conductive rod 3, an insulating gasket 9 disposed between the bolt head of the fixing bolt 12 and the connecting plate 13, and an insulating sleeve 14 disposed between the screw of the fixing bolt 12 and the bolt hole. The insulating guide ring 8 serves a guiding function while preventing current flow through direct contact between the electrical connection 5 and the conductive rod 3; the insulating gasket 9 is used to prevent direct current flow between the fixing bolt 12 and the electrical connection 5. The insulating structure allows the current in the conductive rod 3 to flow normally through the spring contact finger 4 and the electrical connection 5, preventing a loose connection between the electrical connection 5, the conductive rod 3, and the fixing bolt 12 from forming a current-carrying path that affects operation; the insulating sleeve 14 also serves to prevent direct current flow between the fixing bolt 12 and the electrical connection 5. In other embodiments, a resin insulating layer is disposed on the inner wall of the connecting section facing the end face of the conductive rod 3 to achieve a similar function and allow normal operation.

[0032] In a preferred embodiment, the end face of the conductive rod 3 that contacts the insulating guide ring 8 has an annular groove, which facilitates the installation of the insulating guide ring 8 and prevents it from falling off during the fixing of the conductive rod 3. In other embodiments, the annular groove is not provided, which increases the difficulty of installing the insulating guide ring 8, but it can still function normally.

[0033] like Figure 3 , 4 As shown, in a preferred embodiment, the end of the conductive rod 3 is provided with at least two threaded holes 10, evenly distributed on a circle centered on the end face center. This reduces the rotation angle of the conductive rod 3 when it is threadedly connected to the fixing bolt 12, reducing friction during installation and preventing metal foreign objects generated by friction from entering the insulation cavity of the GIS busbar unit, affecting insulation performance, or damaging the silver plating layer on the surface of the conductive rod 3, thus affecting current flow. In other embodiments, only one threaded hole is provided. Although the rotational centering angle is large, which may easily affect insulation performance and current flow capacity, it can still function normally.

[0034] The specific implementation of the GIS busbar encapsulation body of this utility model is as follows:

[0035] like Figure 1 , 2As shown, in a basic embodiment, the GIS busbar enclosure of this utility model includes at least one GIS busbar unit. The GIS busbar unit includes an electrical connection 5 and a conductive rod 3. Connecting sections are provided at both ends of the electrical connection 5. Spring contacts 4 for connecting the conductive rod 3 are fixedly installed inside the connecting sections to ensure stable and reliable current flow. A connecting plate 13 extends radially from the inner wall of the connecting section to fix the conductive rod 3. Bolt holes parallel to the axial direction of the conductive rod 3 are provided on the connecting plate 13. A threaded hole 10 is opened at one end of the conductive rod 3 at a position corresponding to the bolt hole. The conductive rod 3 and the electrical connection 5 are fixedly connected by fixing bolts 12. The electrical connection 5 is designed to limit the axial and radial movement of the conductive rod 3. Operating holes 11 for installing fixing bolts are provided on the wall of the electrical connection 5 to prevent axial movement and radial runout of the conductive rod 3 during transportation. An insulating structure is provided between the electrical connection 5, the end face of the conductive rod 3, and the fixing bolts 12 to prevent loose connections and the formation of a conductive path. Adjacent GIS busbar units are connected by inserting the conductive rod 3 into the electrical connection 5 to achieve current flow. Adjacent busbar cylinders 2 are coaxially fixedly connected to ensure the overall coaxiality of the busbar and good insulation performance. Covers that completely seal the end faces are installed at both ends of the GIS busbar enclosure to prevent foreign objects from entering the busbar during transportation.

[0036] In a preferred embodiment, the insulating structure includes an insulating guide ring 8 disposed between the connecting plate 13 and the corresponding end face of the conductive rod 3, an insulating gasket 9 disposed between the bolt head of the fixing bolt 12 and the connecting plate 13, and an insulating sleeve 14 disposed between the screw of the fixing bolt 12 and the bolt hole. The insulating guide ring 8 serves a guiding function while preventing current flow through direct contact between the electrical connection 5 and the conductive rod 3; the insulating gasket 9 is used to prevent direct current flow between the fixing bolt 12 and the electrical connection 5. The insulating structure allows the current in the conductive rod 3 to flow normally through the spring contact finger 4 and the electrical connection 5, preventing a loose connection between the electrical connection 5, the conductive rod 3, and the fixing bolt 12 from forming a current-carrying path that affects operation; the insulating sleeve 14 also serves to prevent direct current flow between the fixing bolt 12 and the electrical connection 5. In other embodiments, a resin insulating layer is disposed on the inner wall of the connecting section facing the end face of the conductive rod 3 to achieve a similar function and allow normal operation.

[0037] In a preferred embodiment, the end face of the conductive rod 3 that contacts the insulating guide ring 8 has an annular groove, which facilitates the installation of the insulating guide ring 8 and prevents it from falling off during the fixing of the conductive rod 3. In other embodiments, the annular groove is not provided, which increases the difficulty of installing the insulating guide ring 8, but it can still function normally.

[0038] like Figure 3 , 4As shown, in a preferred embodiment, the end of the conductive rod 3 is provided with at least two threaded holes 10, evenly distributed on a circle centered on the end face center. This reduces the rotation angle of the conductive rod 3 when it is threadedly connected to the fixing bolt 12, reducing friction during installation and preventing metal foreign objects generated by friction from entering the insulation cavity of the GIS busbar unit, affecting insulation performance, or damaging the silver plating layer on the surface of the conductive rod 3, thus affecting current flow. In other embodiments, only one threaded hole is provided. Although the rotational centering angle is large, which may easily affect insulation performance and current flow capacity, it can still function normally.

[0039] In a preferred embodiment, the cover plate at one end of the busbar cylinder 2 extending from the conductive rod 3 is a convex cover plate 1. The convex cover plate 1 extends outward with a protrusion to form a cavity inside that mates with the conductive rod 3. The cover plate at the other end is a flat cover plate 7. The convex cover plate 1 serves both a sealing function and a supporting function for the conductive rod 3. In other embodiments, both ends are sealed with cylindrical sealing sleeves. Although the conductive rod 3 may experience some radial runout, it can still function normally.

[0040] In a preferred embodiment, adjacent busbar cylinders 2 are connected by flanges, and the busbar cylinder 2 is connected to the cover plate. This allows for quick and easy disassembly, free combination, and a stable connection, eliminating the need for non-standard spare parts. In other embodiments, adhesive bonding can also be used to connect the cover plate to the busbar cylinder 2, which also functions normally.

[0041] 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 GIS busbar unit, comprising an electrical connection and a conductive rod, wherein connecting sections are provided at both ends of the electrical connection, and spring contact fingers for connecting the conductive rod are fixedly installed inside the connecting sections, characterized in that, The inner wall of the connecting section extends radially along the conductive rod to form a connecting plate for fixing the conductive rod. The connecting plate has bolt holes parallel to the axial direction of the conductive rod. One end of the conductive rod has a threaded hole at the position corresponding to the bolt hole. The conductive rod and the electrical connection are fixedly connected by fixing bolts. The wall of the electrical connection has operating holes for installing fixing bolts. An insulating structure is provided between the electrical connection, the end face of the conductive rod, and the fixing bolts to avoid forming a conductive path due to a loose connection.

2. The GIS bus unit according to claim 1, characterized in that, The insulation structure includes an insulating guide ring between the connecting plate and the corresponding conductive rod end face, an insulating gasket between the bolt head of the fixing bolt and the connecting plate, and an insulating sleeve between the bolt rod of the fixing bolt and the bolt hole.

3. The GIS bus unit according to claim 2, characterized in that, The end face of the conductive rod that contacts the insulating guide ring has an annular groove corresponding to the insulating guide ring.

4. The GIS bus unit according to any one of claims 1-3, characterized in that, At least two threaded holes are provided on the same end face of the conductive rod, and they are evenly distributed on a circle with the center of the end face of the conductive rod as the center.

5. A GIS busbar enclosure, comprising at least one GIS busbar unit, characterized in that, The GIS busbar unit includes an electrical connection and a conductive rod. Connecting sections are provided at both ends of the electrical connection. Spring contacts for connecting the conductive rod are fixedly installed inside the connecting sections. A connecting plate extends radially from the inner wall of the connecting section to fix the conductive rod. Bolt holes parallel to the axial direction of the conductive rod are provided on the connecting plate. A threaded hole is opened at one end of the conductive rod corresponding to the bolt hole. The conductive rod and the electrical connection are fixedly connected by fixing bolts. Operating holes for installing fixing bolts are provided on the wall of the electrical connection. An insulating structure is provided between the electrical connection, the end face of the conductive rod, and the fixing bolts to prevent loose connections and the formation of a current-carrying path. Electrical connections are inserted into adjacent GIS busbar units through conductive rods to achieve current flow. Adjacent busbar cylinders are coaxially fixedly connected. Cover plates that completely seal the end faces are installed at both ends of the GIS busbar enclosure.

6. The GIS busbar encapsulation body according to claim 5, characterized in that, The insulation structure includes an insulating guide ring between the connecting plate and the corresponding conductive rod end face, an insulating gasket between the bolt head of the fixing bolt and the connecting plate, and an insulating sleeve between the bolt rod of the fixing bolt and the bolt hole.

7. The GIS busbar encapsulation body according to claim 6, characterized in that, The end face of the conductive rod that contacts the insulating guide ring has an annular groove corresponding to the insulating guide ring.

8. The GIS busbar encapsulation body according to any one of claims 5-7, characterized in that, At least two threaded holes are provided on the same end face of the conductive rod, and they are evenly distributed on a circle with the center of the end face of the conductive rod as the center.

9. The GIS busbar encapsulation body according to any one of claims 5-7, characterized in that, The cover plate provided on the end of the busbar cylinder at the end where the conductive rod extends is a convex cover plate. The convex cover plate extends outward by a protrusion to form a cavity inside that mates with the conductive rod. The cover plate at the other end is a flat cover plate.

10. The GIS busbar encapsulation body according to any one of claims 5-7, characterized in that, The adjacent busbar cylinders are connected by flanges, as are the busbar cylinders and the cover plate.

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