Patch cord and withstand voltage test device for GIS (Gas Insulated Switchgear)

Abstract

The invention belongs to the field of electrical performance testing devices, and particularly relates to a patch cord for a GIS and a withstand voltage test device. In order to improve the withstand voltage test efficiency, the invention provides a patch cord for a GIS (Gas Insulated Switchgear). The patch cord for the GIS comprises two joints and a cable, the first joint is used for being electrically connected with voltage-withstanding equipment, and the second joint is used for being electrically connected with the GIS; each connector comprises a shell used for defining an air chamber, the shell comprises an insulator, an air valve, a cable mounting hole and a manhole are arranged on the shell, and a conductive connecting structure electrically connected with a conductive insert on the insulator is arranged in the air chamber; and two ends of the cable are inserted into the air chamber from the cable mounting holes of the two shells and are electrically connected with the conductive connection structure. The invention further provides a withstand voltage test device comprising the patch cord for the GIS. The cable can be bent, so that the height of the second joint is adjustable, and the GIS of different specifications can be used; meanwhile, when the GIS of different specifications is tested, the first connector does not need to be disassembled, and the testing efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the field of electrical performance testing devices, and in particular relates to a GIS adapter and a withstand voltage testing device. Background Art

[0002] GIS (Gas Insulated Switchgear) is a commonly used high-voltage switchgear.

[0003] like Figure 1 As shown, before GIS300 leaves the factory, it is necessary to perform a pressure test on GIS300 to test whether GIS300 meets the pressure requirements. When performing the pressure test, it is necessary to use the tube busbar 200 to electrically connect the pressure-resistant equipment 100 and GIS300. When performing the pressure test on different GIS300, the height of the tube busbar 200 is different because the height of the GIS300 is different.

[0004] When conducting a pressure test on GIS300 of different specifications, you can follow the steps below: Step S1, connecting the first type of tubular busbar to the pressure-resistant equipment 100 and the first type of GIS; Step S2, performing a vacuuming operation on the first type of tube busbar, during which the air chamber of the first type of tube busbar is vacuumed (if the first type of tube busbar is not used for the first time, this step can be omitted); Step S3, performing an inflation operation on the first type of tube busbar, during which an insulating gas is filled into the gas chamber; Step S4, performing a withstand voltage test on the first GIS; Step S5, performing an exhaust operation on the first type of tube busbar, during which part of the insulating gas in the gas chamber is exhausted to reduce the gas pressure in the gas chamber; Step S6, removing the first type of tube busbar; Step S7, connect the second type of tubular busbar to the pressure-resistant equipment 100 and the second type of GIS, and then refer to steps S2 to S5 to perform a pressure-resistant test on the second type of GIS, which will not be repeated here.

[0005] In the above steps, on the one hand, different specifications of the busbars 200 need to be prepared for different specifications of the GIS300, resulting in more specifications of the busbars 200, higher costs and inconvenience for on-site management; on the other hand, when testing different GIS, it is necessary to repeatedly install different busbars 200, and repeatedly perform vacuuming, inflation and exhaust operations, which is cumbersome to operate, wastes time and has low test efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a GIS adapter cable to solve the technical problems that when performing pressure tests on GIS of various specifications, it is necessary to prepare tube busbars of various specifications, and it is necessary to repeatedly perform vacuuming operations, inflation operations and exhaust operations, which is not conducive to on-site management, has high costs and low test efficiency.

[0007] The present invention also aims to provide a pressure test device to solve the same technical problem as above.

[0008] To achieve the above purpose, the technical solution of the GIS adapter cable provided by the present invention is: A GIS adapter cable comprises two connectors and a cable for electrically connecting the two connectors, wherein one connector is used for electrically connecting to the GIS, and the other connector is used for electrically connecting to a pressure-resistant device; each connector comprises a shell for enclosing an air chamber, the shell comprises an insulator, an air valve connected to the air chamber, a cable installation hole and a manhole are provided on the shell, a conductive connection structure electrically connected to a conductive insert on the insulator is provided in the air chamber, and a cover for sealing the manhole is detachably installed at the manhole; two ends of the cable are respectively inserted into the air chamber from the cable installation holes of the two shells, and are electrically connected to the conductive connection structure in the air chamber, and a sealing structure is provided between the shell and the cable to ensure the sealing of the air chamber.

[0009] Furthermore, a fixing frame and a lifting structure for cooperating with a lifting device are provided on the outer wall surface of the shell, and the fixing frame is fixedly connected to a side of the cable close to the shell.

[0010] Furthermore, for the connector for electrical connection with GIS, the housing includes a cylinder and an insulator detachably mounted on the cylinder.

[0011] Furthermore, the insulator and the cable installation hole are respectively located at two axial ends of the housing.

[0012] Furthermore, the shell includes a cylinder and a sealing plate installed at one axial end of the cylinder, the insulator is installed at the other axial end of the cylinder, and the cable installation hole is arranged on the sealing plate.

[0013] Furthermore, the conductive connection structure includes a conductive rod for electrically connecting to the conductive insert, a conductive block for electrically connecting to a cable head of a cable, and a transfer conductive plate for electrically connecting the conductive rod to the conductive block.

[0014] Furthermore, one of the cable head and the conductive block is provided with a socket, and the other is provided with a plug that is plugged into and matched with the socket, so as to realize the electrical connection between the conductive block and the cable head.

[0015] Furthermore, the cable includes a first-phase cable, a second-phase cable and a third-phase cable, and the manhole includes a first manhole corresponding to the first-phase cable, a second manhole corresponding to the second-phase cable and a third manhole corresponding to the third-phase cable, and the first manhole, the second manhole and the third manhole are evenly distributed on the outer circumferential surface of the shell along the circumferential direction.

[0016] Furthermore, the cable is detachably mounted on the housing by means of bolts, and a sealing ring is provided between the cable and the housing, and the sealing ring constitutes the sealing structure.

[0017] The beneficial effects of the GIS adapter cable provided by the present invention are as follows: the present invention is a pioneering invention. In the present invention, two connectors are electrically connected by a cable, and since the cable can be bent, after one connector is installed on the pressure-resistant equipment, the height of the other connector can be adjusted according to actual needs, thereby adapting to GIS of different specifications.

[0018] When manufacturing the adapter cable for GIS, first, the cable can be electrically connected to the conductive connection structure through the manhole and the cable installation hole. At this time, the conductive inserts on the insulators of the two joints are electrically connected, thereby realizing the electrical connection between the two joints; then, the cover is installed, and the cover and the sealing structure are used to ensure the sealing of the air chamber.

[0019] When the GIS adapter cable is repaired at a later stage, the cover can be opened and the structure in the air chamber can be inspected through the manhole.

[0020] When using the new GIS adapter cable in the present invention to perform a withstand voltage test on GIS of different specifications, the following steps can be followed: Step S1, electrically connecting one of the connectors (hereinafter referred to as the first connector) to the voltage-resistant equipment, and electrically connecting the other connector (hereinafter referred to as the second connector) to the first GIS; Step S2, performing a vacuum pumping operation on the first joint, and at the same time, performing a vacuum pumping operation on the second joint, during which the air chamber is vacuum pumped through the air valve; Step S3, performing an inflation operation on the first joint and the second joint, during which insulating gas is filled into the gas chamber through the gas valve; Step S4, performing a withstand voltage test on the first GIS; Step S5, performing an exhaust operation on the second joint, during which a part of the insulating gas in the air chamber is exhausted by using an air valve to reduce the air pressure in the air chamber; Step S6, electrically connecting the second connector to the second GIS; Step S7, performing an inflating operation on the second joint; Step S8, performing a withstand voltage test on the second GIS; Step S9, exhausting the second joint; After step S9, the second connector may be further electrically connected to the third type of GIS, which will not be described in detail here.

[0021] Through the above steps, it can be known that when using the GIS adapter cable in the present invention to perform a withstand voltage test on GIS of different specifications, the first joint does not need to be disassembled, and there is no need to repeatedly perform vacuuming and inflation operations on the first joint. It is only necessary to disassemble the second joint and repeatedly perform vacuuming, inflation and exhaust operations on the second joint, which can effectively shorten the inflation and exhaust time, thereby improving the test efficiency. At the same time, there is no need to prepare multiple tube busbars, which saves costs and facilitates on-site management.

[0022] To achieve the above purpose, the technical solution of the pressure test device provided by the present invention is: A withstand voltage test device comprises a withstand voltage device, the withstand voltage port of the withstand voltage device is connected with a GIS adapter cable, the GIS adapter cable comprises two connectors and cables for electrically connecting the two connectors, one connector is used for electrically connecting to the GIS, and the other connector is used for electrically connecting to the withstand voltage device; each connector comprises a shell for enclosing an air chamber, the shell comprises an insulator, an air valve connected to the air chamber, a cable installation hole and a manhole are provided on the shell, a conductive connection structure electrically connected to a conductive insert on the insulator is provided in the air chamber, and a cover for sealing the manhole is detachably installed at the manhole; two ends of the cable are respectively inserted into the air chamber from the cable installation holes of the two shells, and are electrically connected to the conductive connection structure in the air chamber, and a sealing structure is provided between the shell and the cable to ensure the sealing of the air chamber.

[0023] Furthermore, a fixing frame and a lifting structure for cooperating with a lifting device are provided on the outer wall surface of the shell, and the fixing frame is fixedly connected to a side of the cable close to the shell.

[0024] Furthermore, for the connector for electrical connection with GIS, the housing includes a cylinder and an insulator detachably mounted on the cylinder.

[0025] Furthermore, the insulator and the cable installation hole are respectively located at two axial ends of the housing.

[0026] Furthermore, the shell includes a cylinder and a sealing plate installed at one axial end of the cylinder, the insulator is installed at the other axial end of the cylinder, and the cable installation hole is arranged on the sealing plate.

[0027] Furthermore, the conductive connection structure includes a conductive rod for electrically connecting to the conductive insert, a conductive block for electrically connecting to a cable head of a cable, and a transfer conductive plate for electrically connecting the conductive rod to the conductive block.

[0028] Furthermore, one of the cable head and the conductive block is provided with a socket, and the other is provided with a plug that is plugged into and matched with the socket, so as to realize the electrical connection between the conductive block and the cable head.

[0029] Furthermore, the cable includes a first-phase cable, a second-phase cable and a third-phase cable, and the manhole includes a first manhole corresponding to the first-phase cable, a second manhole corresponding to the second-phase cable and a third manhole corresponding to the third-phase cable, and the first manhole, the second manhole and the third manhole are evenly distributed on the outer circumferential surface of the shell along the circumferential direction.

[0030] Furthermore, the cable is detachably mounted on the housing by means of bolts, and a sealing ring is provided between the cable and the housing, and the sealing ring constitutes the sealing structure.

[0031] The beneficial effects of the pressure test device provided by the present invention are as follows: the present invention is an improved invention. The pressure test device of the present invention comes with a GIS adapter cable, one connector of the GIS adapter cable is always connected to the pressure-resistant equipment, and the other connector (hereinafter referred to as the second connector) is used to electrically connect to the GIS. When testing GIS of different specifications, it is only necessary to electrically connect the second connector to the GIS of different specifications, and perform inflation and exhaust operations on the second connector. The operation is convenient and is conducive to improving the test efficiency. At the same time, there is no need to prepare a variety of tube busbars on site, which can reduce costs and is conducive to on-site management. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the use of pressure-resistant equipment to perform pressure-resistant testing on GIS in the prior art; Figure 2 A schematic structural diagram of a specific implementation of a GIS adapter cable of the present invention; Figure 3 This is a schematic diagram of the structure of the air chamber in a specific implementation of the GIS adapter cable of the present invention; Figure 4 It is a structural schematic diagram of the air chamber in another specific implementation manner of the GIS adapter cable of the present invention; Figure 5 It is a schematic structural diagram of the pressure resistance test device of the present invention.

[0033] Description of reference numerals: Figure 1 Medium: 100, pressure-resistant equipment; 200, busbar; 300, GIS.

[0034] Figures 2~5In: 1. First joint; 1', second joint; 11. Disc insulator; 12. Mounting bolt; 13. Conductive rod; 14. Connecting bolt; 15. Transfer conductive plate; 16. Conductive block; 17. Cylinder; 18. Sealing ring; 19. Sealing plate; 2. Fixing frame; 3. Cable; 31. Cable head; 311. Plug; 4. Air valve; 5. Sealing cover; 6. Pressure-resistant equipment; 7. GIS. DETAILED DESCRIPTION

[0035] In order to solve the problems in the background technology, the core inventive concept of the present invention is: two independent connectors are set, and the two connectors are electrically connected through a cable, so as to facilitate the adjustment of the height of the connector used for electrical connection with GIS; at the same time, the connector used for electrical connection with the pressure-resistant equipment does not need to be repeatedly disassembled and assembled, and only the connector used for electrical connection with GIS needs to be repeatedly vacuumed, inflated and exhausted, which can effectively shorten the filling and exhaust time, thereby improving the test efficiency.

[0036] The present invention is further described in detail below in conjunction with embodiments.

[0037] Specific embodiments of the GIS adapter cable provided by the present invention: In reference Figure 5 On the basis of Figures 2~4 As shown, the GIS adapter cable includes two connectors and a cable 3 for electrically connecting the two connectors, one of which (hereinafter referred to as the first connector 1) is used to electrically connect to the GIS 7, and the other connector (hereinafter referred to as the second connector 1') is used to electrically connect to the pressure-resistant equipment 6; each connector includes a shell for enclosing an air chamber, the shell includes an insulator, and the shell is provided with an air valve 4 connected to the air chamber, a cable installation hole and a manhole, a conductive connection structure electrically connected to the conductive insert on the insulator is provided in the air chamber, and a cover 5 for sealing the manhole is detachably installed at the manhole; both ends of the cable 3 are respectively inserted into the air chamber from the cable installation holes of the two shells, and are electrically connected to the conductive connection structure in the air chamber, and a sealing structure is provided between the shell and the cable 3 to ensure the sealing of the air chamber.

[0038] The manhole is a hole for a human body to enter and exit, and its size satisfies that a worker's hand can be inserted into the air chamber through the manhole; the insulator is preferably a disc insulator 11 with a simple structure. Of course, the insulator can also be a pot insulator.

[0039] Preferably, the two connectors are identical and do not need to be distinguished between the front and back when in use. However, when the sizes of the pressure-resistant port of the pressure-resistant device 6 and the busbar port of the GIS7 are inconsistent, the sizes of the two connectors are different. In this case, it is necessary to distinguish between the front and back when in use and install the corresponding connector on the corresponding pressure-resistant device 6 or GIS7.

[0040] In the present invention, the two connectors are electrically connected via the cable 3. Since the cable 3 can be bent, after the first connector 1 is installed on the pressure-resistant equipment 6, the height of the second connector 1' can be adjusted according to actual needs to adapt to GIS 7 of different specifications.

[0041] When manufacturing the adapter cable for GIS, first, the cable 3 can be electrically connected to the conductive connection structure through the manhole and the cable installation hole. At this time, the conductive inserts on the insulators of the two joints are electrically connected, thereby realizing the electrical connection between the two joints; then, the cover 5 is installed, and the cover 5 and the sealing structure are used to ensure the sealing of the air chamber.

[0042] When the GIS adapter cable is repaired at a later stage, the cover 5 can be opened and the structure in the air chamber can be repaired through the manhole.

[0043] When using the new GIS adapter cable in the present invention to perform a withstand voltage test on GIS7 of different specifications, the following steps can be followed: Step S1, electrically connecting the first connector 1 to the voltage-resistant equipment 6, and electrically connecting the second connector 1' to the first GIS; Step S2, performing a vacuum pumping operation on the first joint 1, and at the same time, performing a vacuum pumping operation on the second joint 1', during which the air chamber is vacuum pumped through the air valve 4; Step S3, performing an inflation operation on the first joint 1 and the second joint 1', during which insulating gas is filled into the gas chamber through the gas valve 4; Step S4, performing a withstand voltage test on the first GIS; Step S5, performing an exhaust operation on the second joint 1', during which a part of the insulating gas in the gas chamber is exhausted by using the gas valve 4 to reduce the gas pressure in the gas chamber; Step S6, electrically connecting the second connector 1' to the second GIS; Step S7, performing an inflating operation on the second connector 1'; Step S8, performing a withstand voltage test on the second GIS; Step S9, exhausting the second joint 1'; After step S9, the second connector 1' can be further electrically connected to the third type of GIS, which will not be described in detail here.

[0044] In the above steps, when disassembling or installing each joint, it is necessary to use a hoist to move the corresponding joint. A hoisting structure for cooperating with the hoist is provided on the outer wall of the shell. The hoisting structure can be a lifting ring, a lifting hole or other conventional structure that cooperates with the hoist, which will not be repeated here.

[0045] Through the above steps, it can be known that when using the GIS adapter cable in the present invention to perform a withstand voltage test on GIS7 of different specifications, the first joint 1 does not need to be disassembled, and there is no need to repeatedly perform vacuuming and inflation operations on the first joint 1. It is only necessary to disassemble the second joint 1' and repeatedly perform vacuuming, inflation and exhaust operations on the second joint 1', which can effectively shorten the inflation and exhaust time, thereby improving the test efficiency. At the same time, there is no need to prepare multiple tube busbars, which saves costs and facilitates on-site management.

[0046] In a specific embodiment, when the joint is moved by using a lifting device, the cable 3 is easily disconnected from the conductive connection structure. After the cable 3 is disconnected from the conductive connection structure, it is necessary to open the cover 5 and perform maintenance through the manhole.

[0047] Preferably, in another specific embodiment, a fixing frame 2 is provided on the outer wall surface of the shell, and the fixing frame 2 is fixedly connected to the side of the cable 3 close to the shell by means of adhesive or interference fitting. When the joint is moved by using a sling, the fixing frame 2 fixes the side of the cable 3 close to the shell to avoid stress on both ends of the cable 3, thereby preventing the cable 3 from being disconnected from the conductive connection structure, and improving the reliability of the electrical connection between the cable 3 and the conductive connection structure.

[0048] In order to simplify the structure, as a specific implementation, the insulator and the cable installation hole are respectively located at the axial ends of the shell, and the shell is in a straight cylinder shape with a simple structure.

[0049] Preferably, the shell includes a cylinder 17 and a sealing plate 19 installed at one axial end of the cylinder 17. The insulator is detachably installed at the other axial end of the cylinder 17 by means of a mounting bolt 12 or a pin or other connecting member. The cable mounting hole is arranged on the sealing plate 19. By replacing different sealing plates 19, the size of the cable mounting hole can be changed to adapt to cables 3 of different thicknesses.

[0050] It should be noted that, for the second joint 1', when the insulator is detachably mounted on the cylinder 17, the second joint 1' can be adapted to GIS7 with different interfaces by replacing the insulator. When performing a withstand voltage test on GIS7 with different interfaces, you can choose to replace the GIS adapter cable as a whole, or you can choose to replace the insulator of the second joint 1' separately.

[0051] In other specific implementations, for the second joint 1', the insulator can also be fixed on the cylinder by welding or other methods. In this case, when performing a withstand voltage test on a GIS 7 with different interfaces, the GIS adapter cable must be replaced.

[0052] In other specific embodiments, the cylinder 17 and the sealing plate 19 may also be an integral unit. In this case, the housing is only suitable for cables 3 of one thickness. When the thickness of the cables 3 is different, different housings must be replaced.

[0053] In other specific embodiments, the shell may also be an "L"-shaped two-way cylinder, and the insulator and the cable installation holes are respectively located at two ends of the "L"-shaped two-way cylinder.

[0054] As a specific embodiment, the conductive connection structure includes a conductive rod 13 for electrically connecting to the conductive insert, a conductive block 16 for electrically connecting to the cable head 31 of the cable 3, and a transfer conductive plate 15 for electrically connecting the conductive rod 13 to the conductive block 16. Among them, one end of the conductive rod 13 is electrically connected to the conductive insert through a connecting bolt 14, and the other end of the conductive rod 13 is electrically connected to the transfer conductive plate 15 through a connecting bolt 14. The transfer conductive plate 15 is also electrically connected to the conductive block 16 through the connecting bolt 14, and the conductive block 16 is electrically connected to the cable head 31 of the cable 3.

[0055] In other specific embodiments, the conductive connection structure may also only include the conductive rod 13 , the conductive insert and the cable head 31 have axes that coincide with each other, and both ends of the conductive rod 13 are directly electrically connected to the conductive insert and the cable head 31 , respectively.

[0056] Compared with the technical solution in which the two ends of the conductive rod 13 are directly electrically connected to the conductive insert and the cable head 31 respectively, in the technical solution in which the conductive connection structure includes a transfer conductive plate 15, there is no need to make the cable head 31 and the conductive insert axially coincide with each other, which facilitates the arrangement of the cable mounting hole and the conductive insert.

[0057] When the conductive connection structure includes the conductive block 16, in order to conveniently realize the electrical connection between the conductive block 16 and the cable head 31, Figure 4 In the specific embodiment shown, the cable head 31 is a conical cable head, the conductive block 16 has a conical jack, and a portion of the conical cable head is inserted into the conical jack to achieve electrical connection between the conductive block 16 and the cable head 31. At this time, the portion of the conical cable head inserted into the conical jack constitutes a plug 311, and the GIS adapter cable is suitable for the withstand voltage test of the GIS7 with a higher voltage level.

[0058] In other specific embodiments, the jack may also be an inverted cone jack provided on the cable head 31, the slider has an inverted cone plug, and the inverted cone plug is inserted into the inverted cone jack to achieve electrical connection between the conductive block 16 and the cable head 31. At this time, the GIS adapter cable is suitable for the withstand voltage test of the GIS7 with a higher voltage level.

[0059] In other specific implementations, the socket may also be a cylindrical socket, and the plug 311 may be a cylindrical plug. In this case, the GIS adapter cable is suitable for the withstand voltage test of the GIS7 with a lower voltage level.

[0060] In other specific embodiments, the cable head 31 may also be electrically connected to the conductive block 16 by bolts, or, as Figure 3 As shown, the cable head 31 abuts against the conductive block 16 , so that the cable head 31 is electrically connected to the conductive block 16 .

[0061] Since the busbar of GIS7 is a three-phase busbar, cable 3 is also a three-phase cable. Specifically, cable 3 includes a first-phase cable, a second-phase cable and a third-phase cable. Each phase cable is configured with an independent conductive connection structure and an independent conductive insert.

[0062] To facilitate the assembly and maintenance of the GIS adapter cable, in a specific embodiment, the manhole includes a first manhole corresponding to the first phase cable, a second manhole corresponding to the second phase cable, and a third manhole corresponding to the third phase cable. The first manhole, the second manhole and the third manhole are evenly distributed on the outer surface of the shell along the circumferential direction, so that different manholes can be conveniently used to assemble or repair the corresponding phase cables.

[0063] In other specific implementations, the number of manholes may be only one. In this case, the manhole is relatively large, and workers can assemble or repair three-phase cables at the same time through the manhole.

[0064] In order to simplify the structure, preferably, the cable 3 is detachably mounted on the housing by bolts, and a sealing ring 18 is provided between the cable 3 and the housing. The sealing ring 18 constitutes the sealing structure, which has a simple structure.

[0065] However, in other specific embodiments, the cable 3 can also be fixed to the shell by pins. In this case, sealant can be filled between the shell and the cable 3, and the sealant constitutes the sealing structure; or, the cable 3 is directly welded to the shell. In this case, the weld produced during welding constitutes the sealing structure.

[0066] The specific embodiment of the pressure test device provided by the present invention is as follows: In reference Figures 2~4 On the basis of Figure 5 As shown, in the present invention, the pressure test device includes a pressure-resistant device 6, and the pressure-resistant port of the pressure-resistant device 6 is connected to a GIS adapter cable, and the GIS adapter cable is any one of the specific embodiments of the GIS adapter cable of the present invention.

[0067] The pressure test device of the present invention is equipped with a GIS adapter cable. The first connector 1 of the GIS adapter cable is always connected to the pressure-resistant device 6, and the second connector 1' is used to be electrically connected to the GIS7. When testing GIS7 of different specifications, it is only necessary to electrically connect the second connector 1' to the GIS7 of different specifications, and perform the inflation and exhaust operations on the second connector 1'. The operation is convenient and is conducive to improving the test efficiency. At the same time, there is no need to prepare a variety of tube busbars on site, which can reduce costs and is conducive to on-site management.

[0068] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions recorded in the aforementioned embodiments without creative work, or to replace some of the technical features therein with equivalents, or to organically combine different specific implementations to combine the attached Figures 2~5 The specific implementation methods given in the specification are, of course, those skilled in the art can also combine the specific implementation methods not given in the other drawings of the specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A GIS adapter cable, characterized in that: It comprises two connectors and a cable for electrically connecting the two connectors, wherein one connector is used for electrically connecting to GIS, and the other connector is used for electrically connecting to pressure-resistant equipment; each connector comprises a shell for enclosing an air chamber, the shell comprises an insulator, an air valve connected to the air chamber, a cable installation hole and a manhole are provided on the shell, a conductive connection structure electrically connected to a conductive insert on the insulator is provided in the air chamber, and a cover for sealing the manhole is detachably installed at the manhole; both ends of the cable are respectively inserted into the air chamber from the cable installation holes of the two shells, and are electrically connected to the conductive connection structure in the air chamber, and a sealing structure is provided between the shell and the cable to ensure the sealing of the air chamber.

2. The GIS adapter cable according to claim 1, characterized in that: A fixing frame and a lifting structure used to cooperate with the lifting device are arranged on the outer wall surface of the shell, and the fixing frame is fixedly connected to a side of the cable close to the shell.

3. The GIS adapter cable according to claim 1 or 2, characterized in that: For the joint used for electrical connection with GIS, the housing includes a cylinder and an insulator detachably mounted on the cylinder.

4. The GIS adapter cable according to claim 1 or 2, characterized in that: The insulator and the cable installation holes are respectively located at two axial ends of the shell.

5. The GIS adapter cable according to claim 4, characterized in that: The shell comprises a cylinder and a sealing plate installed at one axial end of the cylinder, the insulator is installed at the other axial end of the cylinder, and the cable installation hole is arranged on the sealing plate.

6. The GIS adapter cable according to claim 1 or 2, characterized in that: The conductive connection structure comprises a conductive rod for electrically connecting to the conductive insert, a conductive block for electrically connecting to a cable head of a cable, and a transfer conductive plate for electrically connecting the conductive rod to the conductive block.

7. The GIS adapter cable according to claim 6, characterized in that: One of the cable head and the conductive block is provided with a socket, and the other is provided with a plug that is plugged and matched with the socket, so as to realize the electrical connection between the conductive block and the cable head.

8. The GIS adapter cable according to claim 1 or 2, characterized in that: The cables include a first-phase cable, a second-phase cable and a third-phase cable, and the manholes include a first manhole corresponding to the first-phase cable, a second manhole corresponding to the second-phase cable and a third manhole corresponding to the third-phase cable. The first manhole, the second manhole and the third manhole are evenly distributed on the outer circumferential surface of the shell along the circumferential direction.

9. The GIS adapter cable according to claim 1 or 2, characterized in that: The cable is detachably mounted on the housing by means of bolts, and a sealing ring is arranged between the cable and the housing, and the sealing ring constitutes the sealing structure.

10. A pressure test device, comprising a pressure-resistant device, characterized in that: The pressure-resistant port of the pressure-resistant equipment is connected to the GIS adapter cable as described in any one of claims 1 to 9.

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