Environment-friendly GIS withstand voltage test tool

Abstract

The utility model relates to the technical field of testing of high-voltage switches, in particular to an environment-friendly GIS (Gas Insulated Switchgear) withstand voltage test tool. The environment-friendly GIS withstand voltage test tool comprises a cylinder body and a connecting plate used for being connected with an environment-friendly GIS three-phase center conductor, a basin-type insulator is installed in the cylinder body, a transition flange used for being matched with an environment-friendly GIS bus cylinder body is installed at the tail end of the cylinder body, a through hole used for being connected with the cylinder body is formed in the outer ring of the transition flange, and a through hole is formed in the outer ring of the transition flange. The inner ring of the transition flange is provided with a connecting hole used for being connected with an environment-friendly GIS bus cylinder. One side of the connecting plate is used for being connected with a contact seat of a three-phase center conductor of the environment-friendly GIS, and the other side of the connecting plate is connected with the basin-type insulator, so that switching between the three-phase center conductor of the environment-friendly GIS and the basin-type insulator is realized. The environment-friendly GIS withstand voltage test tool can enable the environment-friendly GIS and the withstand voltage test tool to be in smooth butt joint, is high in universality, and can reduce the withstand voltage test cost of the environment-friendly GIS.

Description

TECHNICAL FIELD

[0001] The utility model relates to the test technical field of high voltage switch especially relates to a kind of environmental protection GIS withstand voltage test tool. BACKGROUND

[0002] GIS has the pivotal position in power system, and its reliability, security and stability are crucial to the overall operation of power system.GIS uses gas insulation technology, has the advantages such as small footprint, not affected by atmospheric environment, pollution prevention, anti-electromagnetic interference, is widely used in power system, so it has higher requirements for the performance and quality of GIS, to ensure that GIS can be safely and reliably operated, usually GIS withstand voltage test is carried out to detect its insulation performance, to ensure that it can operate normally under high voltage environment.

[0003] A kind of GIS withstand voltage test tool is disclosed in the Chinese invention patent with authorized announcement number CN104865505B and authorized announcement date March 6, 2018, the GIS withstand voltage test tool includes outgoing line bushing, outgoing line bushing is connected with cylinder at one end, the lower end of cylinder is equipped with the connecting port for being connected with GIS, connecting port is provided with the basin type insulator for being connected with GIS three-phase center conductor, the GIS withstand voltage test tool can be successfully docked with environmental protection GIS with gas medium being sulfur hexafluoride (SF6) and withstand voltage test is carried out.

[0004] Since SF6 has strong greenhouse effect, C4F7N / CO2 / O2 mixed gas is used to replace SF6 as gas medium in environmentally-friendly GIS at present, but there is a big difference between the insulation performance of C4F7N / CO2 / O2 mixed gas and SF6, and the recovery ability of C4F7N / CO2 / O2 mixed gas is poor, so in order to ensure the insulation performance of environmentally-friendly GIS, the basin insulator of environmentally-friendly GIS using C4F7N / CO2 / O2 mixed gas as medium is usually larger than that of environmentally-friendly GIS using SF6 gas as medium, and the three-phase center conductor of environmentally-friendly GIS is usually arranged at three vertices of an equilateral triangle, but it is not limited to be an equilateral triangle, and the three-phase center conductor connection structure of the basin insulator of the withstand voltage test tool is usually arranged at three vertices of an equilateral triangle, so the three-phase center conductor connection structure of the withstand voltage test tool and the three-phase center conductor of environmentally-friendly GIS may not be on the same concentric circle, and the three-phase center conductor of C4F7N / CO2 / O2 mixed gas environmentally-friendly GIS may not be connected with the basin insulator of the withstand voltage test tool smoothly. In order to ensure the universality of the withstand voltage test tool, the diameter of the cylinder of the withstand voltage test tool is usually larger than that of the bus cylinder of C4F7N / CO2 / O2 mixed gas environmentally-friendly GIS, and the cylinder and the bus cylinder cannot be connected smoothly, and there is a problem that the existing withstand voltage test tool cannot be used for C4F7N / CO2 / O2 mixed gas environmentally-friendly GIS. Practical new type content

[0005] The utility model discloses a kind of environmentally-friendly GIS withstand voltage test tools, to solve the problem that the existing GIS withstand voltage test tool cannot be connected with C4F7N / CO2 / O2 mixed gas environmentally-friendly GIS smoothly.

[0006] To achieve the above object, the environmentally-friendly GIS withstand voltage test tool of the utility model adopts the following technical scheme:

[0007] The environmentally-friendly GIS withstand voltage test tool includes a cylinder and a connecting plate for connecting with the three-phase center conductor of environmentally-friendly GIS, a basin insulator is installed in the cylinder, a transition flange for cooperating with the bus cylinder of environmentally-friendly GIS is installed at the end of the cylinder, a through hole for connecting with the cylinder is arranged on the outer ring of the transition flange, a connecting hole for connecting with the bus cylinder of environmentally-friendly GIS is arranged on the inner ring of the transition flange, one side of the connecting plate is connected with the contact seat of the three-phase center conductor of environmentally-friendly GIS, and the other side is connected with the basin insulator, to realize the switching of the three-phase center conductor of environmentally-friendly GIS and the basin insulator.

[0008] Further, the connecting hole is a threaded hole with one end opening.

[0009] Further, a contact is connected between the connecting plate and the basin type insulator.

[0010] Further, bolt holes for connecting with the contact and counterbores for bolt connecting with the contact seat of the three-phase central conductor of the environmentally-friendly GIS are arranged on the connecting plate.

[0011] Further, the bolt holes are at least three.

[0012] Further, the centers of the at least three bolt holes are uniformly distributed on a same circle.

[0013] Further, the counterbores are threaded holes.

[0014] Further, the connecting plate is connected with the contact through a screw.

[0015] Further, a contact connecting hole for connecting with the contact is arranged on the basin type insulator.

[0016] Further, the contact connecting hole is a threaded hole with one end open.

[0017] Beneficial effects: the environmentally-friendly GIS withstand voltage test tool is an improved invention. The environmentally-friendly GIS withstand voltage test tool is provided with a transition flange at the end of the cylinder body, one side of the transition flange is connected with the cylinder body, the other side is connected with the bus cylinder body of the environmentally-friendly GIS, the bus cylinder body of the environmentally-friendly GIS can be connected on the withstand voltage test tool, so that the two can be smoothly butt-jointed; the environmentally-friendly GIS withstand voltage test tool further comprises a connecting plate, the connecting plate can be connected with the three-phase central conductor in the environmentally-friendly GIS, the connecting plate is connected on the basin type insulator, so that the basin type insulator can be smoothly butt-jointed with the three-phase central conductor of the environmentally-friendly GIS, under the action of the connecting plate and the transition flange, the environmentally-friendly GIS can be smoothly connected on the withstand voltage test tool to perform a withstand voltage test, the insulation performance of the environmentally-friendly GIS is tested, the environmentally-friendly GIS withstand voltage test tool has strong universality, and the test cost of the withstand voltage test on the environmentally-friendly GIS can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic view of an embodiment of the environmentally-friendly GIS withstand voltage test tool of the utility model connecting with the environmentally-friendly GIS;

[0019] Figure 2 the environmentally-friendly GIS withstand voltage test tool of the utility model Figure 1 Fig. 2 is an installation schematic view of the connecting plate of the embodiment of the environmentally-friendly GIS withstand voltage test tool of the utility model;

[0020] Figure 3 the environmentally-friendly GIS withstand voltage test tool of the utility model Figure 1 Fig. 3 is a structural schematic view of the connecting plate of the embodiment of the environmentally-friendly GIS withstand voltage test tool of the utility model;

[0021] Figure 4 The environmental protection GIS withstand voltage test tool of the present application Figure 1 The sectional view of the connecting plate A-A of the embodiment;

[0022] Figure 5 The structural schematic view of the transition flange of the environmental protection GIS withstand voltage test tool of the present application;

[0023] Figure 6 The sectional view of the transition flange of the environmental protection GIS withstand voltage test tool of the present application.

[0024] In the figure: 1, cylinder; 2, basin type insulator; 3, transition flange; 4, contact; 5, connecting plate; 6, through hole; 7, connecting hole; 8, bolt hole; 9, counterbore; 10, busbar cylinder; 11, first contact seat; 12, second contact seat; 13, conductive rod; 14, environmental protection GIS basin type insulator. DETAILED DESCRIPTION

[0025] The features and performances of the present application are further described in detail in combination with the embodiments.

[0026] The environmental protection GIS withstand voltage test tool of the present application passes through the design of transition connecting structure, so that the C4F7N / CO2 / O2 mixed gas environmental protection GIS can be smoothly docked with the existing withstand voltage test tool and withstand voltage test is carried out, and the test cost of the C4F7N / CO2 / O2 mixed gas environmental protection GIS withstand voltage test is reduced.

[0027] In a basic embodiment, as shown in Figure 1 The environmental protection GIS withstand voltage test tool includes cylinder 1, basin type insulator 2 is installed in cylinder 1, and transition flange 3 is installed at the end of cylinder 1, because the existing withstand voltage test tool is designed according to the maximum specification to ensure its universality, so the diameter of cylinder 1 will be larger than the busbar cylinder 10 of environmental protection GIS, and transition flange 3 is installed at the end of cylinder 1, as shown in Figure 5 , 6As shown, the outer circle of the transition flange 3 is provided with a through hole 6, the transition flange 3 can be connected with the cylinder body 1 of the pressure test tool through the through hole 6, and the inner circle of the transition flange 3 is provided with a connecting hole 7, so that the bus cylinder body 10 of the environmentally-friendly GIS can be connected with the cylinder body 1 of the pressure test tool through the connecting hole 7 in the inner circle, and the bus cylinder body 10 of the environmentally-friendly GIS can be smoothly butted. The cylinder body 1 of the pressure test tool, the transition flange 3 and the bus cylinder body 10 of the environmentally-friendly GIS are connected through bolts, so that the installation and disassembly of the environmentally-friendly GIS during the pressure test can be facilitated. The environmentally-friendly GIS pressure test tool also comprises a connecting plate 5, the existence of the connecting plate 5 can make the C4F7N / CO2 / O2 mixed gas environmentally-friendly GIS and the basin type insulator 2 of the pressure test tool butt smoothly, and the environmentally-friendly GIS and the pressure test tool can be smoothly butted and subjected to pressure test under the action of the transition flange 3 and the connecting plate 5, so that the universality of the pressure test tool can be improved, the environmentally-friendly GIS of the C4F7N / CO2 / O2 mixed gas does not need to be subjected to pressure test by redesigning the pressure test tool, and the test cost is reduced.

[0028] In a preferred embodiment, the connecting hole 7 is a threaded hole with one end open, so that after the bus cylinder body 10 of the environmentally-friendly GIS is connected with the transition flange 3, the bolt cannot penetrate into the cylinder body 1 of the pressure test tool through the transition flange 3, and the problem of arc formation between the connecting plate 5 and the bolt during the pressure test can be prevented. In other embodiments, the connecting hole 7 can be a light hole with one end open, and a nut can be embedded in the connecting hole in advance, and the bus cylinder body 10 of the environmentally-friendly GIS can be connected with the cylinder body 1 of the pressure test tool through the bolt.

[0029] In a preferred embodiment, the connecting plate 5 is connected with the basin type insulator 2 through the contact 4, the basin type insulator 2 of the pressure test tool is connected with the three-phase center conductor of the environmentally-friendly GIS through the contact 4 and the connecting plate 5, the conductivity between the conductor in the pressure test tool and the environmentally-friendly GIS can be ensured, and the test result is more accurate; in other embodiments, the connecting plate 5 can be directly connected with the basin type insulator 2, and the connecting plate 5 is in communication with the conductor in the pressure test tool, so that the cost of the pressure test of the environmentally-friendly GIS can be reduced.

[0030] In a preferred embodiment, the connecting plate 5 is provided with a bolt hole 8 and a counterbore 9, the connecting plate 5 can be connected with the contact 4 of the three-phase center conductor of the environmentally-friendly GIS through the bolt hole 8, and the connecting plate 5 can be connected with the first contact seat 11 of the three-phase center conductor of the environmentally-friendly GIS through the counterbore 9, the positions of the three-phase center conductors in different environmentally-friendly GISes can be different, such as Figure 3As shown, the centers of the bolt holes 8 on the connecting plate 5 are on the same circle, and the three-phase center conductors of the environmentally-friendly GIS may not be at the three vertices of an equilateral triangle, the angle B between the line connecting the center of the bolt hole 8 of each connecting plate 5 and the center of the circle on which the bolt hole 8 is located and the symmetry line of the connecting plate 5 is different, so the positions of the counterbores 9 on each connecting plate 5 are also different, and the direction of the counterbores 9 needs to be determined by changing the positions of the bolt holes 8. When the positions of the bolt holes 8 on the connecting plate 5 are determined, the positions of the counterbores 9 can be determined through the positions of the bolt holes 8 on the connecting plate 5, so that the three-phase center conductors of the environmentally-friendly GIS and the connecting plate 5 can be smoothly connected and installed. As shown in Figure 2 Figure 2 、 3 , 4, when the connecting plate 5 is connected with the three-phase center conductors of the environmentally-friendly GIS, the first contact seat 11 is first connected on the connecting plate 5 through a bolt, the second contact seat 12 is installed on the environmentally-friendly GIS basin-type insulator 14 of the environmentally-friendly GIS, and the conductive rod 13 connected between the first contact seat 11 and the second contact seat 12 realizes the smooth connection between the two, and further realizes the smooth connection between the basin-type insulator 2 of the withstand voltage test tool and the three-phase center conductors of the environmentally-friendly GIS. Under the joint action of the connecting plate 5 and the transition flange 3, the withstand voltage test tool and the environmentally-friendly GIS are smoothly connected, and the environmentally-friendly GIS can be subjected to a withstand voltage test.

[0031] In a preferred embodiment, the bolt holes 8 on the connecting plate 5 for connecting with the contact 4 are at least three, which can ensure the stability of the connection when the contact 4 is installed on the connecting plate 5, and can prevent the contact 4 from loosening to affect the accuracy of the results of the withstand voltage test on the environmentally-friendly GIS. In other embodiments, the bolt holes 8 on the connecting plate 5 for connecting with the contact 4 can be four or more, which can further improve the stability of the connection between the connecting plate 5 and the contact 4, and ensure that the contact 4 will not loosen to affect the accuracy of the results of the withstand voltage test on the GIS device.

[0032] In a preferred embodiment, the centers of the bolt holes 8 on the connecting plate 5 are uniformly distributed on the same circle, which can be more convenient when determining the positions of the counterbores 9 through the bolt holes 8 and determining the swing angle of the connecting plate 5, improve the efficiency of the connection between the environmentally-friendly GIS and the withstand voltage test tool, and further improve the work efficiency during the withstand voltage test. In other embodiments, the positions of the bolt holes 8 on the connecting plate 5 correspond to the positions of the bolt holes on the contact 4 of the three-phase center conductors of the environmentally-friendly GIS, and the bolt holes on the contact 4 may not be uniformly distributed, so the bolt holes 8 may not be uniformly distributed on the connecting plate 5, but it does not affect the connection between the connecting plate 5 and the first contact seat 11 of the three-phase center conductors of the environmentally-friendly GIS, and does not affect the withstand voltage test.

[0033] In a preferred embodiment, the threaded hole is provided in the counterbore 9 of the connecting plate 5, and a threaded hole is provided in the first contact seat 11 for screwing with the connecting plate, the threaded hole is a blind hole with one end open, the connecting plate 5 is fixedly connected with the first contact seat 11 through a bolt, and the bolt is screwed with the internal thread in the counterbore 9 and the threaded hole in the first contact seat 11 to tightly connect the connecting plate 5 and the first contact seat 11. The connection between the connecting plate 5 and the first contact seat 11 can be facilitated, and the connecting plate 5 and the first contact seat 11 do not need to be fixedly connected through a bolt by using a nut, which reduces the cost of connection during the pressure test of the environmentally friendly GIS. In other embodiments, the first contact seat 11 is a cylindrical structure with one end open, and a conductive rod 13 is also installed in the first contact seat 11. A through hole for screwing with the connecting plate 5 can be provided on the closed end of the first contact seat 11, and the connecting plate 5 and the first contact seat 11 are fixedly connected through a bolt and a nut. The installation and disassembly of the connecting plate 5 and the first contact seat 11 can be facilitated, and the wear of the first contact seat 11 caused by the bolt can be reduced, thereby prolonging the service life of the first contact seat 11.

[0034] In a preferred embodiment, a threaded hole for screwing is provided on the contact 4, and the contact 4 and the connecting plate 5 are fixedly connected through a screw. The screw connection between the two can facilitate the disassembly and installation of the connecting plate 5 and the contact 4, and the contact 4 or the connecting plate 5 can be easily replaced when they are damaged after long-term use. In other embodiments, the contact 4 and the connecting plate 5 can be an integrated structure, and the contact 4 is welded to the connecting plate. This can improve the structural stability between the contact 4 and the connecting plate 5, reduce the wear of the contact 4 caused by the bolt, prevent the contact 4 from being unable to use due to the occurrence of thread stripping in the threaded hole of the contact 4, prolong the service life of the contact 4, and make the result of the pressure test of the environmentally friendly GIS more accurate.

[0035] In a preferred embodiment, the bushing insulator 2 of the pressure test tool is provided with a contact connecting hole, which is a threaded hole with internal threads, and the contact 4 can be fixedly connected to the bushing insulator 2 by bolts. The bolt connection can facilitate the installation and removal of the contact 4 when the environmentally friendly GIS is subjected to pressure test and after the pressure test. In other embodiments, the contact 4 can be fixedly connected to the bushing insulator 2 by screws. The contact connecting holes on the bushing insulator 2 are distributed at the three vertices of an equilateral triangle, and the three-phase center conductors of the environmentally friendly GIS are also distributed at the three vertices of an equilateral triangle, which facilitates the smooth butt joint of the bushing insulator 2 and the three-phase center conductors of the environmentally friendly GIS. In other embodiments, the contact connecting holes on the bushing insulator 2 can be light holes, and nuts can be embedded in the contact connecting holes. The contact 4 can be fixedly connected to the bushing insulator 2 by bolts cooperating with the nuts, and at the same time, the wear of the bushing insulator 2 by the bolts can be reduced, and the service life of the bushing insulator 2 can be prolonged.

[0036] The above is only a preferred embodiment of the present application, and is not used to limit the present application. The patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings should also be included in the protection scope of the present application.

Claims

1. An environmentally-friendly GIS pressure test tooling, comprising a cylinder and a connecting plate for connecting with a three-phase central conductor of an environmentally-friendly GIS, a basin insulator is installed in the cylinder, characterized in that, A transition flange is arranged at the end of the cylinder body for cooperating with the environment-friendly GIS bus cylinder body, a through hole for connecting with the cylinder body is arranged at the outer ring of the transition flange, and a connecting hole for connecting with the environment-friendly GIS bus cylinder body is arranged at the inner ring of the transition flange; one side of the connecting plate is used for connecting with the contact seat of the environment-friendly GIS three-phase center conductor, and the other side is connected with the basin-type insulator to realize the switching of the three-phase center conductor of the environment-friendly GIS and the basin-type insulator.

2. The environmentally friendly GIS withstand voltage test tooling of claim 1, wherein, The connecting hole is a threaded hole with one end open.

3. The environmentally friendly GIS pressure test kit according to claim 1 or 2, characterized in that, A contact is connected between the connecting plate and the basin-type insulator.

4. The environmentally friendly GIS pressure test test fixture of claim 3, wherein, A bolt hole for connecting with the contact and a counterbore for bolt connection with the contact seat of the environment-friendly GIS three-phase center conductor are arranged on the connecting plate.

5. The environmentally friendly GIS withstand voltage test tooling of claim 4, wherein, The bolt hole has at least three.

6. The environmentally friendly GIS withstand voltage test tooling of claim 5, wherein, The centers of the at least three bolt holes are uniformly distributed on the same circle.

7. The environmentally friendly GIS withstand voltage test tooling of claim 4, wherein, The counterbore is a threaded hole.

8. The environmentally friendly GIS withstand voltage test tooling of claim 4, wherein, The connecting plate is connected with the contact through a screw.

9. The environmentally friendly GIS withstand voltage test tooling of claim 3, wherein, A contact connecting hole for connecting with the contact is arranged on the basin-type insulator.

10. The environmentally friendly GIS withstand voltage test tooling of claim 9, wherein, The contact connecting hole is a threaded hole with one end open.

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