Bushing structure for GIS and GIS

Abstract

The utility model relates to the field of switch equipment, in particular to a sleeve structure for a GIS (Gas Insulated Switchgear) and the GIS. The bushing structure for the GIS comprises a bushing and a switching module arranged between the bushing and an equipment main body, the switching module comprises a cylinder and an insulator located at one end, far away from the bushing, of the cylinder, and the switching module further comprises a switching conductor fixedly arranged on a metal insert of the insulator; and one end, far away from the metal insert, of the switching conductor is fixedly connected with the sleeve conducting rod. The end part of the sleeve is directly and fixedly connected with the end part of the cylinder body, and one end, far away from the insulator, of the switching conductor is fixedly connected with the sleeve conducting rod in the sleeve, so that the use of the insulator and a static contact is saved, and the sleeve conducting rod and the switching conductor are directly connected together; the problem that in the prior art, a switching module is used between the sleeve and the equipment body, and insulators are arranged at the upper end and the lower end of the switching module, so that the GIS construction cost is increased is solved.

Description

Technical Field

[0001] The utility model relates to the field of switch equipment, in particular to a bushing structure for GIS and a GIS. Background Art

[0002] Gas Insulated Metal-enclosed Switchgear (GIS) is one of the most important equipment in the power grid. Among them, 126kV GIS, as a conventional GIS product, is an important part of the power transmission and transformation link, and the product usage occupies a relatively prominent position.

[0003] like Figure 1 As shown, the GIS includes a device body 1 and a bushing 3. The bushing 3 is the output end of the GIS device and needs to be connected to an external busbar or cable. A switching module is often provided between the bushing 3 and the device body 1. The switching module includes a barrel 24 and insulators 21 located at both ends of the barrel 24. The insulators 21 at both ends and the barrel 24 form a closed structure. Three metal inserts are prefabricated on each insulator 21. The metal inserts penetrate the insulator 21, and a connection structure for conductive connection is formed on both sides of the insulator 21. Three conductive rods are provided inside the barrel 24. In order to realize the connection between the conductive rod and the metal insert on the insulator 21, a static contact 28 is fixed and conductively connected on the metal insert. The conductive rod is inserted into the static contact 28 to realize the conductive connection between the metal inserts of the two insulators 21. The switching module plays a role of connecting the upper and lower parts. At the same time, after the insulator 21 at the upper end of the switching module is installed, the position of its metal insert is fixed, and it can also provide a reference and support for the installation of the conductive rod in the bushing.

[0004] For GIS, the interior is often filled with sulfur hexafluoride gas. During installation and maintenance, the internal sulfur hexafluoride gas needs to be inflated and deflated. In order to save gas usage and inflation and deflation time, each module is usually sealed separately to form an independent air chamber. Specifically, the adapter module forms a separate air chamber through the insulators at the upper and lower ends, and a separate air chamber is also formed inside the bushing. During the installation process, each part can be inflated and deflated separately. Due to design habits, the adapter module of 126KVGIS also adopts the setting of a separate air chamber. However, the size of the adapter module in the 126KV GIS is relatively small. Even if it is connected to the internal space of the bushing, it will not cause too much increase in volume. On the contrary, due to the setting of the insulator on the upper part of the adapter module, the overall cost increases. Utility Model Content

[0005] The purpose of the utility model is to provide a bushing structure for GIS, which is used to solve the problem of increased GIS construction cost caused by the use of a switching module between the bushing and the equipment body in the prior art, in which insulators are provided at both the upper and lower ends of the switching module; the purpose of the utility model is also to provide a GIS for solving the above-mentioned technical problems.

[0006] In order to achieve the above purpose, the casing structure for GIS in the utility model adopts the following technical solutions:

[0007] A bushing structure for GIS includes a bushing and a switching module for being arranged between the bushing and a device body, wherein a bushing conductive rod is arranged in the bushing, the switching module includes a barrel and an insulator located at one end of the barrel away from the bushing, a metal insert is arranged on the insulator, an end of the bushing is directly fixedly connected to an end of the barrel, and the switching module also includes a switching conductor fixedly arranged on the metal insert of the insulator, and an end of the switching conductor away from the metal insert is fixedly connected to the bushing conductive rod.

[0008] Furthermore, the transition conductor is fixedly connected to the metal insert by a first fastening bolt, and a first installation cavity for installing the first fastening bolt is provided at one end of the transition conductor close to the insulator, and an operating port connected to the internal cavity of the first installation cavity for inserting a tool is provided on the cavity wall of the first installation cavity.

[0009] Furthermore, the transition conductor includes a transition conductive rod and an adapter fixedly arranged on the metal insert, the adapter and the metal insert are fixed by the first fastening bolt, the adapter and the transition conductive rod are fixedly connected by the second fastening bolt, and the operating port on the first installation cavity is also for tools to be inserted to install the second fastening bolt.

[0010] Furthermore, a first positioning pin is arranged between the transition conductor and the metal insert.

[0011] Furthermore, at least two first positioning pins are provided, and at least two first fastening bolts are also provided, and the first positioning pins and the first fastening bolts are staggered in the circumferential direction.

[0012] Furthermore, a second positioning pin is provided between the adapter and the adapter conductive rod.

[0013] Further, at least two second positioning pins are provided, and at least two second fastening bolts are also provided, and the second positioning pins and the second fastening bolts are alternately arranged along the circumferential direction.

[0014] Furthermore, the sleeve conductive rod and the transition conductor are fixedly connected by a third fastening bolt, and a second installation cavity for installing the third fastening bolt is provided on one of the sleeve conductive rod and the transition conductor, and an operating port connected to the internal cavity of the second installation cavity for inserting a tool is provided on the cavity wall of the second installation cavity.

[0015] Furthermore, at least two third positioning pins are provided between the bushing conductive rod and the transition conductor, at least two third fastening bolts are provided, and the third positioning pins and the third fastening bolts are staggered in the circumferential direction.

[0016] The beneficial effects of the GIS bushing structure in the utility model are as follows: the utility model improves the existing GIS bushing structure, and facilitates supporting the bushing by setting a transfer module, and also plays a role in connecting the bushing conductive rod in the bushing and the equipment body; an insulator is provided at the end of the barrel away from the bushing, and the metal insert on the insulator is convenient for electrical connection with the equipment body, and the equipment body and the bushing structure can also be separated by the insulator to form independent air chambers respectively; the end of the bushing is directly fixedly connected to the end of the barrel, and the end of the transfer conductor away from the insulator is fixedly connected to the bushing conductive rod in the bushing, thereby saving the use of insulators and static contacts, so that the bushing conductive rod and the transfer conductor are directly connected together, and the bushing conductive rod in the bushing needs to be supported and fixed, so the transfer conductor is fixedly set on the insulator, which is convenient for providing a basis for fixing the bushing conductive rod, thereby solving the problem of increased GIS construction cost caused by using a transfer module between the bushing and the equipment body in the prior art and having insulators at both upper and lower ends of the transfer module.

[0017] To achieve the above purpose, the GIS in the present utility model adopts the following technical solutions:

[0018] A GIS comprises an equipment body and a bushing structure, wherein the bushing structure comprises a bushing and a switching module used to be arranged between the bushing and the equipment body, a bushing conductive rod is arranged in the bushing, the switching module comprises a cylinder and an insulator located at one end of the cylinder away from the bushing, a metal insert is arranged on the insulator, an end of the bushing is directly fixedly connected to an end of the cylinder, and the switching module also comprises a switching conductor fixedly arranged on the metal insert of the insulator, and an end of the switching conductor away from the metal insert is fixedly connected to the bushing conductive rod.

[0019] Furthermore, the transition conductor is fixedly connected to the metal insert by a first fastening bolt, and a first installation cavity for installing the first fastening bolt is provided at one end of the transition conductor close to the insulator, and an operating port connected to the internal cavity of the first installation cavity for inserting a tool is provided on the cavity wall of the first installation cavity.

[0020] Furthermore, the transition conductor includes a transition conductive rod and an adapter fixedly arranged on the metal insert, the adapter and the metal insert are fixed by the first fastening bolt, the adapter and the transition conductive rod are fixedly connected by the second fastening bolt, and the operating port on the first installation cavity is also for tools to be inserted to install the second fastening bolt.

[0021] Furthermore, a first positioning pin is arranged between the transition conductor and the metal insert.

[0022] Furthermore, at least two first positioning pins are provided, and at least two first fastening bolts are also provided, and the first positioning pins and the first fastening bolts are staggered in the circumferential direction.

[0023] Furthermore, a second positioning pin is provided between the adapter and the adapter conductive rod.

[0024] Further, at least two second positioning pins are provided, and at least two second fastening bolts are also provided, and the second positioning pins and the second fastening bolts are alternately arranged along the circumferential direction.

[0025] Furthermore, the sleeve conductive rod and the transition conductor are fixedly connected by a third fastening bolt, and a second installation cavity for installing the third fastening bolt is provided on one of the sleeve conductive rod and the transition conductor, and an operating port connected to the internal cavity of the second installation cavity for inserting a tool is provided on the cavity wall of the second installation cavity.

[0026] Furthermore, at least two third positioning pins are provided between the bushing conductive rod and the transition conductor, at least two third fastening bolts are provided, and the third positioning pins and the third fastening bolts are staggered in the circumferential direction.

[0027] The beneficial effects of the GIS in the utility model are as follows: the utility model improves the existing GIS, and facilitates the support of the bushing by setting the adapter module, and also plays the role of connecting the bushing conductive rod in the bushing and the equipment body; the adapter module is provided with an insulator at the end of the barrel away from the bushing, and the metal insert on the insulator is convenient for electrical connection with the equipment body, and the equipment body and the bushing structure can be separated by the insulator to form independent air chambers respectively; the bushing end is directly fixedly connected to the barrel end, and the end of the transfer conductor away from the insulator is fixedly connected to the bushing conductive rod in the bushing, thereby saving the use of insulators and static contacts; the bushing conductive rod in the bushing needs to be supported and fixed, so the transfer conductor is fixedly set on the insulator, which is convenient for providing a basis for fixing the bushing conductive rod, thereby solving the problem of increased GIS construction cost caused by the use of an adapter module between the bushing and the equipment body in the prior art and the insulators at both the upper and lower ends of the adapter module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of GIS in the prior art;

[0029] Figure 2 It is a structural schematic diagram of an embodiment of GIS in the utility model.

[0030] In the figure: 1. Equipment body; 2. Adapter module; 21. Insulator; 211. Metal insert; 22. Adapter; 23. Adapter conductive rod; 24. Cylinder; 25. Second fastening bolt; 26. Third fastening bolt; 27. Second positioning pin; 28. Static contact; 3. Bushing; 31. Bushing conductive rod; 4. Hand hole cover. DETAILED DESCRIPTION

[0031] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0032] In the utility model, a GIS is provided with a switching module between the equipment body and the bushing, and a switching conductor directly fixedly connected to the bushing conductive rod is provided inside the switching module, thereby saving the use of insulators.

[0033] In the embodiment of the utility model GIS:

[0034] In this embodiment, the GIS includes a device body and a casing structure, wherein the casing structure includes a casing for electrically connecting to an external cable and a switching module connected between the device body and the casing. Figure 2 As shown, the sleeve 3 includes an external ceramic tube and a sleeve conductive rod 31 located inside the ceramic tube. The sleeve conductive rod 31 needs to be connected to the device body 1, so the adapter module 2 is also provided with a cylinder 24 and a transfer conductor located inside the cylinder 24, and the electrical connection between the sleeve conductive rod 31 and the device body 1 is achieved through the transfer conductor.

[0035] The adapter module 2 needs to be fixedly connected to the device body 1 and the sleeve 3 respectively, so an insulator 21 is provided at one end of the adapter module 2 located at the barrel 24 away from the sleeve 3. The insulator 21 can be used to separate the device body 1 and the sleeve 3, so that the gas between the device body 1 and the sleeve 3 is not connected. During the installation process, the gas can be inflated in stages, which is more convenient for installation. A metal insert 211 is prefabricated on the insulator 21. The metal insert 211 passes through the insulator 21 and is exposed on the plate surface at both ends of the insulator 21. While achieving sealing, it can also achieve conductive connection on both sides of the insulator 21. The barrel 24 and the ceramic tube of the sleeve 3 are directly fixedly connected, which also supports the sleeve 3. One end of the transfer conductor is fixedly connected to the metal insert 211 on the insulator 21, and the other end is directly fixedly connected to the sleeve conductive rod 31, which saves the use of the insulator 21 between the adapter module 2 and the sleeve 3. Since the bushing conductive rod 31 needs to be supported, the transition conductor is fixedly arranged on the metal insert 211 of the insulator 21 , providing an installation basis for the installation of the bushing conductive rod 31 .

[0036] The transfer conductor includes a transfer conductive rod 23 and a transfer connector 22 fixedly arranged on the insulator 21. The transfer conductive rod 23 is a hollow conductive rod. Of course, a solid conductive rod can also be used. The two ends of the transfer connector 22 are fixedly connected to the insulator 21 and the transfer conductive rod 23 respectively. In order to facilitate the connection of the three, a hollow structure is formed in the middle of the transfer connector 22, and then a first installation cavity is provided on the transfer connector 22 to facilitate the installation of fasteners. The transfer connector 22 and the transfer conductive rod 23 and the transfer connector 22 and the insulator 21 are fixedly connected by fastening bolts. Specifically, the transfer connector 22 and the transfer conductive rod 23 are screwed together by the second fastening bolt 25, and the transfer connector 22 and the insulator 21 are fixed together by the first fastening bolt. The cavity wall of the first installation cavity is provided with an operating port that connects the internal cavity of the first installation cavity for the installation of the first fastening bolt and the second fastening bolt 25. The transfer conductive rod 23 and the insulator 21 are respectively provided with threaded holes, and the adapter 22 is provided with round holes to facilitate the installation of bolts. However, the provision of the round holes on the adapter 22 will also cause coaxiality errors between each other during the installation process, which is not conducive to the connection of the sleeve conductive rod 31. Therefore, a first locating pin is also provided between the adapter 22 and the insulator 21, and a second locating pin 27 is also provided between the adapter 22 and the transfer conductive rod 23. There are two first locating pins and two first fastening bolts, and the first locating pins and the first fastening bolts are arranged alternately in the circumferential direction. There are two second locating pins 27 and two second fastening bolts 25, and the second locating pins 27 and the second fastening bolts 25 are arranged at intervals around the axis of the transfer conductor. It is worth noting that the first locating pin and the second locating pin 27 are directly formed on the adapter 22, which also play a role in preventing errors during the installation process.

[0037] Of course, in other embodiments, the transfer conductor may no longer be separately provided but may be integrally formed, and a first installation cavity may be provided at one end of the transfer conductor close to the insulator 21. Alternatively, in other embodiments, the first locating pin or the second locating pin 27 is no longer provided, but only the first fastening bolt and the second fastening bolt 25 are provided. Alternatively, in other embodiments, only one, three or four first locating pins may be provided, or only one, three or four second locating pins 27 may be provided, and the number of the first fastening bolt and the second fastening bolt may also be adjusted. Alternatively, in other embodiments, the first installation cavity may no longer be provided, and a stud bolt may be provided between the insulator 21 and the transfer conductor, and a threaded hole for matching with the stud bolt may be provided at the axis of the transfer conductor. Alternatively, in other embodiments, the first locating pin may be provided on a metal insert, and the second locating pin may be provided on a transfer conductive rod. Alternatively, the first locating pin and the second locating pin are both independent pins and are installed independently.

[0038] In order to realize the connection between the transfer conductive rod 23 and the sleeve conductive rod 31, a third fastening bolt 26 is arranged between the transfer conductive rod 23 and the sleeve conductive rod 31, and a second installation cavity is arranged on the sleeve conductive rod 31. The cavity wall of the second installation cavity is provided with an operation port connected to the inner cavity of the second installation cavity for the installation of the third fastening bolt 26. A hollow structure is formed at one end of the sleeve conductive rod 31 close to the transfer conductive rod 23, which is convenient for the connection between the transfer conductive rod 23 and the sleeve conductive rod 31, and provides space for the installation of the third fastening bolt 26 between the transfer conductive rod 23 and the sleeve conductive rod 31. At the same time, the sleeve conductive rod 31 has precision requirements for the docking position, so a third positioning pin is also arranged between the transfer conductive rod 23 and the sleeve conductive rod 31. Accordingly, two third positioning pins and two third fastening bolts 26 are provided, and the third positioning pins and the third fastening bolts 26 are staggered in the circumferential direction. The third locating pin is fixedly arranged on the transfer conductive rod 23, and a pin hole matching the third locating pin on the transfer conductive rod is arranged on the sleeve conductive rod 31. Of course, in other embodiments, a second mounting cavity may be arranged on the transfer conductive rod 23, or, in other embodiments, the third locating pin may no longer be arranged, and only the third fastening bolt 26 may be used for fixed connection. Alternatively, in other embodiments, the third locating pin may also be arranged on the sleeve conductive rod, or the third locating pin may be arranged independently. Alternatively, in other embodiments, the number of the third locating pin and the third fastening bolt may also be set to three or other numbers greater than two.

[0039] In the embodiment of the casing structure for GIS in the utility model: the structure of the casing structure for GIS in this embodiment is the same as the casing structure in the above-mentioned GIS embodiment, and will not be repeated here.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bushing structure for GIS, comprising a bushing and a transfer module arranged between the bushing and the equipment body, wherein a bushing conductive rod is arranged in the bushing, and the transfer module comprises a cylinder and an insulator located at one end of the cylinder away from the bushing, wherein a metal insert is arranged on the insulator, and the characteristics are: The end of the bushing is directly fixedly connected to the end of the cylinder. The switching module also includes a switching conductor fixedly arranged on the metal insert of the insulator. One end of the switching conductor away from the metal insert is fixedly connected to the bushing conductive rod.

2. The casing structure for GIS according to claim 1, characterized in that: The transition conductor is fixedly connected to the metal insert by a first fastening bolt. A first installation cavity for installing the first fastening bolt is provided at one end of the transition conductor close to the insulator. An operating port connected to the internal cavity of the first installation cavity for inserting a tool is provided on the cavity wall of the first installation cavity.

3. The casing structure for GIS according to claim 2, characterized in that: The transfer conductor includes a transfer conductive rod and a transfer joint fixedly arranged on a metal insert. The transfer joint and the metal insert are fixedly connected by the first fastening bolt. The transfer joint and the transfer conductive rod are fixedly connected by a second fastening bolt. The operating port on the first installation cavity is also for a tool to be inserted into for installing the second fastening bolt.

4. The casing structure for GIS according to claim 2 or 3, characterized in that: A first positioning pin is also arranged between the transition conductor and the metal insert.

5. The casing structure for GIS according to claim 4, characterized in that: At least two first positioning pins are provided, and at least two first fastening bolts are also provided. The first positioning pins and the first fastening bolts are alternately arranged along the circumferential direction.

6. The casing structure for GIS according to claim 3, characterized in that: A second positioning pin is also provided between the adapter and the adapter conductive rod.

7. The casing structure for GIS according to claim 6, characterized in that: At least two second positioning pins are provided, and at least two second fastening bolts are also provided. The second positioning pins and the second fastening bolts are alternately arranged along the circumferential direction.

8. The casing structure for GIS according to any one of claims 1 to 3, characterized in that: The sleeve conductive rod and the transition conductor are fixedly connected by a third fastening bolt, and a second installation cavity for installing the third fastening bolt is provided on one of the sleeve conductive rod and the transition conductor, and an operating port connected to the internal cavity of the second installation cavity for inserting a tool is provided on the cavity wall of the second installation cavity.

9. The casing structure for GIS according to claim 8, characterized in that: At least two third positioning pins are arranged between the bushing conductive rod and the transition conductor, and at least two third fastening bolts are arranged, and the third positioning pins and the third fastening bolts are arranged alternately along the circumferential direction.

10. A GIS, comprising a device body and a casing structure, characterized in that: The casing structure is the same as the casing structure for GIS described in any one of claims 1-9.

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