GIS bent neck voltage-withstanding tool

Abstract

The utility model relates to the field of voltage withstanding tests, in particular to a GIS bent neck voltage withstanding tool. The cable comprises a sleeve assembly, a bent neck assembly and a conductor. The sleeve assembly is obliquely distributed and comprises a conductive tube, a first grading ring, a sleeve sleeving the peripheral side of the conductive tube, two groups of connecting assemblies electrically connected to the top end and the bottom end of the conductive tube respectively, and a wiring terminal connected with the sleeve, the first grading ring and the connecting assembly at the top end of the conductive tube; the bent-neck assembly comprises a bent-tube-shaped bent-neck shell of which the top end is connected with the bottom end of the sleeve, an insulating assembly connected to the bottom end of the bent-neck shell, a voltage-sharing assembly connected to the insulating assembly, a bent-neck conductor of which the bottom end is connected to the upper part of the insulating assembly, and a first contact seat connected between the top end of the bent-neck conductor and the connecting assembly at the bottom end of the conductive tube. According to the utility model, the direction of the sleeve can be rotated on site, obstacles are avoided, resources and time are saved, and voltage withstanding work of the interval and the cable head can be realized by only replacing the conductor at the lower part.

Description

Technical Field

[0001] This utility model relates to the field of pressure resistance testing, and in particular to a GIS neck pressure resistance fixture. Background Technology

[0002] Gas-Insulated Switchgear (GIS) switches require withstand voltage tests before operation. However, substations in various regions are complex, with increasingly compact switch layouts. During on-site withstand voltage testing, the bushings are often obstructed by temporary obstacles such as walls and structures, making it impossible to guarantee the insulation distance. This necessitates multiple disassemblies and gas filling / defilling cycles to complete the withstand voltage test, resulting in resource waste and significant power outage time. Furthermore, for substations with all cable-operated lines, withstand voltage tests on the bays are also mandatory, similarly wasting resources and time. Utility Model Content

[0003] The purpose of this utility model is to address the problems existing in the background technology by proposing a GIS elbow pressure-resistant tooling that can rotate the direction of the bushing on site to avoid obstacles, save resources and time, and achieve pressure resistance work for the bay and cable head.

[0004] The technical solution of this utility model is a GIS elbow pressure-resistant fixture, including a sleeve assembly, an elbow assembly, and a conductor. The sleeve assembly is obliquely distributed and includes a conductive tube, a first equalizing ring, a sleeve fitted around the outer periphery of the conductive tube, two sets of connecting assemblies electrically connected to the top and bottom ends of the conductive tube, and terminals connected to the sleeve, the first equalizing ring, and the top connecting assembly of the conductive tube. The elbow assembly includes an elbow-shaped elbow housing with its top end connected to the bottom end of the sleeve, an insulating assembly connected to the bottom end of the elbow housing, an equalizing assembly connected to the insulating assembly, an elbow conductor with its bottom end connected to the upper part of the insulating assembly, and a first contact seat connected between the top end of the elbow conductor and the bottom connecting assembly of the conductive tube. The elbow conductor is distributed along the direction of the elbow housing on the inner side of the elbow housing. The conductor is connected to the bottom end of the insulating assembly.

[0005] Preferably, both ends of the conductive tube have internal threads, and both sets of connecting components include screw plugs threaded to the internal threads. One set of connecting components also includes a first connector, and the other set of connecting components also includes a second connector. The two screw plugs on both sides are respectively connected to the first connector and the second connector by a first bolt.

[0006] Preferably, the insulating assembly includes an insulator and an intermediate insert embedded in the middle of the insulator.

[0007] Preferably, the voltage equalization assembly includes a second voltage equalization ring and a third voltage equalization ring. The second voltage equalization ring is located on the outer periphery of the bottom end of the bent conductor and is locked on the top of the intermediate insert. The bent conductor, the intermediate insert, and the second voltage equalization ring are connected by a fourth bolt. The third voltage equalization ring is located on the outer periphery of the conductor and is locked on the bottom of the intermediate insert. The conductor, the intermediate insert, and the third voltage equalization ring are connected by a fifth bolt.

[0008] Preferably, the curved housing has an opening on its side, and a cover plate is installed at the opening, with an air nozzle and an adsorbent on the cover plate.

[0009] Preferably, the cover plate has a density relay interface.

[0010] Preferably, the conductor is a first conductor or a second conductor, wherein the length of the second conductor is greater than the length of the first conductor.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects:

[0012] This invention can avoid obstacles and ensure insulation distance by rotating the bushing on-site through a pre-planned withstand voltage path, saving resources and time. It can achieve interval withstand voltage and cable head withstand voltage by changing the conductor at the bottom, solving the problem that conventional vertical bushings cannot meet the withstand voltage requirements under the insulation safety distance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model when applied to the interval pressure resistance;

[0014] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle;

[0015] Figure 3 for Figure 1 Enlarged view of the structure at point B;

[0016] Figure 4 for Figure 1 Enlarged view of the structure at point C;

[0017] Figure 5 This is a schematic diagram of the assembly structure of this utility model when applied to intermittent pressure resistance.

[0018] Figure 6 This is a partial structural diagram of an embodiment of the present invention applied to the withstand voltage of a cable;

[0019] Figure 7 This is a schematic diagram of a partial assembly structure of the present invention when applied to the withstand voltage of a cable.

[0020] Reference numerals: 1. Conductive tube; 2. Plug; 3. First connector; 4. First bolt; 5. Second connector; 6. Terminal; 7. Second bolt; 8. Sleeve; 9. First equalizing ring; 10. Third bolt; 11. Bent-neck housing; 12. First contact seat; 13. Bent-neck conductor; 14. Insulator; 15. Intermediate insert; 16. Second equalizing ring; 17. Fourth bolt; 18. Third equalizing ring; 19. Fifth bolt; 20. First conductor; 21. Cover plate; 22. First four-way housing; 23. Second contact seat; 24. Second conductor; 25. Second four-way housing; 26. Third contact seat. Detailed Implementation

[0021] Example 1

[0022] like Figures 1-5 As shown in the figure, the GIS elbow pressure-resistant tooling proposed in this embodiment includes a sleeve assembly, an elbow assembly, and a conductor.

[0023] The sleeve assembly is inclined and includes a conductive tube 1, a first equalizing ring 9, a sleeve 8 fitted around the outer periphery of the conductive tube 1, two sets of connecting assemblies electrically connected to the top and bottom ends of the conductive tube 1, and a terminal block 6 connected to the sleeve 8, the first equalizing ring 9, and the connecting assembly at the top of the conductive tube 1. The terminal block 6, the sleeve 8, and the first equalizing ring 9 are connected by a third bolt 10. Both the conductive tube 1 and the sleeve 8 are inclined. After the bending pressure-resistant fixture is assembled, both sets of connecting assemblies are located inside the fixture.

[0024] like Figure 2 and Figure 3 As shown, both ends of the conductive tube 1 have internal threads, and both sets of connecting assemblies include screw plugs 2 threaded to the internal threads. The screw plugs 2 have threads on both the inner and outer sides, and are connected to the internal threads of the conductive tube 1 via the outer threads. One set of connecting assemblies also includes a first connector 3, and the other set includes a second connector 5. Both sets of connecting assemblies use the same screw plugs 2, saving costs. The two screw plugs 2 on both sides are connected to the first connector 3 and the second connector 5 respectively via first bolts 4; that is, the bottom screw plug 2 is connected to the first connector 3 via the first bolt 4 at its inner thread, and the top screw plug 2 is connected to the second connector 5 via the first bolt 4 at its inner thread. The first connector 3 and the second connector 5 abut against both ends of the conductive tube 1. The second connector 5 and the terminal block 6 are connected via second bolts 7, and the terminal block 6 has threads adapted to the second bolt 7.

[0025] The bent-neck assembly includes a bent-neck housing 11 with its top end connected to the bottom end of the sleeve 8, an insulating component connected to the bottom end of the bent-neck housing 11, a voltage equalization component connected to the insulating component, a bent-neck conductor 13 with its bottom end connected to the upper part of the insulating component, and a first contact 12 connected between the top end of the bent-neck conductor 13 and the bottom end connection component of the conductive tube 1. The first contact 12 is specifically connected to the first connector 3. The bent-neck conductor 13 is distributed along the direction of the bent-neck housing 11 inside the bent-neck housing 11, and both the bent-neck housing 11 and the bent-neck conductor 13 are bent-neck in shape.

[0026] The insulation assembly includes an insulator 14 and an intermediate insert 15 embedded in the middle of the insulator 14, with the top and bottom ends of the intermediate insert 15 protruding from the insulator 14.

[0027] The voltage equalization assembly includes a second voltage equalization ring 16 and a third voltage equalization ring 18. The second voltage equalization ring 16 is located above the third voltage equalization ring 18, and both rings serve to equalize the electric field. The second voltage equalization ring 16 is located on the outer periphery of the bottom end of the bent conductor 13 and is secured to the top of the intermediate insert 15. The bent conductor 13, the intermediate insert 15, and the second voltage equalization ring 16 are connected by a fourth bolt 17. The third voltage equalization ring 18 is located on the outer periphery of the conductor and is secured to the bottom of the intermediate insert 15. The conductor, the intermediate insert 15, and the third voltage equalization ring 18 are connected by a fifth bolt 19. The fourth bolt 17 and the fifth bolt 19 securely connect the bent conductor 13, the intermediate insert 15, and the voltage equalization assembly.

[0028] The conductor is connected to the bottom of the insulating component; the conductor is the first conductor 20. For example... Figure 5 As shown, the bent housing 11 and insulator 14 are installed above the first four-way housing 22. During installation, the orientation of the bushing 8 is adjusted, and the bent housing 11, insulator 14, and first four-way housing 22 are connected by bolts while avoiding obstacles. The first conductor 20 extends downward and is connected to the second contact 23 inside the first four-way housing 22.

[0029] like Figure 4 As shown, the curved housing 11 has an opening on its side, and a cover plate 21 is installed at the opening. The cover plate 21 is equipped with a gas nozzle and an adsorbent. The gas nozzle allows for the inflation and deflation of the internal gas chamber of the pressure-resistant fixture, and the adsorbent absorbs moisture from the internal gas chamber. After the pressure-resistant fixture is installed, the internal gas chamber is evacuated and then filled with SF6 gas. The cover plate 21 has a density relay interface, which is independently located within the gas chamber and used to detect the gas pressure. If the pressure is qualified, a pressure resistance test can be performed.

[0030] This embodiment can avoid obstacles by rotating the bushing 8 on-site through a pre-planned withstand voltage path, ensuring the insulation distance, saving resources and time. It can achieve the withstand voltage of the substation without bushings through the first conductor 20, solving the problem that conventional vertical bushings cannot meet the withstand voltage under the insulation safety distance.

[0031] Example 2

[0032] This embodiment proposes a GIS elbow pressure-resistant tooling. Compared with Embodiment 1, in this embodiment, as follows: Figure 6 and Figure 7 As shown, the conductor is the second conductor 24, and the length of the second conductor 24 is greater than the length of the first conductor 20. Similar to the conductive tube 1 and the two sets of connecting assemblies at both ends in Embodiment 1, in this embodiment, the second conductor 24 includes a rod body and two sets of connector assemblies at both ends. The connector assembly includes a screw cylinder and a connector. The screw cylinder is connected to the rod body, and the connector is connected to the screw cylinder by bolts. The connector is located at the end of the rod body.

[0033] In this embodiment, the second conductor 24 extends downward, passes through the inner side of the second four-way housing 25, and connects to the third contact 26, which is mounted on the lower cable socket. By replacing the first conductor 20 in Embodiment 1 with the second conductor 24, it can be used for the withstand voltage of the cable head.

[0034] In the above embodiments, when using bolts to connect parts, washers are used in conjunction to protect the surface of the parts, improve the fastening effect, and prevent loosening.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A GIS elbow pressure-resistant tooling, characterized in that, include: The sleeve assembly, which is inclinedly distributed, includes a conductive tube (1), a first equalizing ring (9), a sleeve (8) sleeved on the outer periphery of the conductive tube (1), two sets of connecting assemblies electrically connected to the top and bottom ends of the conductive tube (1), and a terminal block (6) connected to the sleeve (8), the first equalizing ring (9) and the top connecting assembly of the conductive tube (1). The bent assembly includes a bent housing (11) with its top end connected to the bottom end of the sleeve (8), an insulating assembly connected to the bottom end of the bent housing (11), an equalizing assembly connected to the insulating assembly, a bent conductor (13) with its bottom end connected to the upper part of the insulating assembly, and a first contact (12) connected between the top end of the bent conductor (13) and the bottom end connection assembly of the conductive tube (1). The bent conductor (13) is distributed along the direction of the bent housing (11) inside the bent housing (11). A conductor that is connected to the bottom of an insulating component.

2. The GIS neck pressure-resistant tooling according to claim 1, characterized in that, The conductive tube (1) has internal threads at both ends. Both sets of connecting components include a screw plug (2) threaded to the internal thread. One set of connecting components also includes a first connector (3), and the other set of connecting components also includes a second connector (5). The two screw plugs (2) on both sides are connected to the first connector (3) and the second connector (5) respectively by a first bolt (4).

3. The GIS neck pressure-resistant tooling according to claim 1, characterized in that, The insulation assembly includes an insulator (14) and an intermediate insert (15) embedded in the middle of the insulator (14).

4. The GIS neck pressure-resistant tooling according to claim 3, characterized in that, The voltage equalization assembly includes a second voltage equalization ring (16) and a third voltage equalization ring (18). The second voltage equalization ring (16) is located on the outer periphery of the bottom end of the bent conductor (13) and is locked on the top of the intermediate insert (15). The bent conductor (13), the intermediate insert (15), and the second voltage equalization ring (16) are connected by a fourth bolt (17). The third voltage equalization ring (18) is located on the outer periphery of the conductor and is locked on the bottom of the intermediate insert (15). The conductor, the intermediate insert (15), and the third voltage equalization ring (18) are connected by a fifth bolt (19).

5. A GIS neck pressure-resistant tooling according to claim 1, characterized in that, The curved housing (11) has an opening on its side, and a cover plate (21) is installed at the opening. An air nozzle and an adsorbent are provided on the cover plate (21).

6. A GIS neck pressure-resistant tooling according to claim 5, characterized in that, The cover plate (21) has a density relay interface.

7. A GIS neck pressure-resistant tooling according to claim 1, characterized in that, The conductor is either a first conductor (20) or a second conductor (24), with the second conductor (24) having a longer length than the first conductor (20).

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