GIS lightning arrester electrical test tool

Abstract

The invention relates to the technical field of electrical tests, and discloses a GIS lightning arrester electrical test tool which comprises a placement table, a tank switch is arranged on the right side of the placement table, a first contact and a second contact are slidably connected to the two ends of the tank switch respectively, a distance adjusting part and a rotation driving part are arranged on the surface of the first contact, and the distance adjusting part and the rotation driving part are arranged on the surface of the second contact. A clamping assembly is arranged in the containing table, and a switch driving piece is arranged between the tank type switch and the second contact. After the sliding block is attached to the surface of the fixing frame, the rack plate pulls the fixing frame through the sliding block, the sliding frame and the fixing frame get close to the placing table, and the sleeve is attached to a contact in the GIS lightning arrester shielding case; the driving shaft drives the driving bevel gear to rotate so as to drive the sleeve to rotate, and in conclusion, the sleeve is close to the placing table while rotating, so that the sleeve is in butt joint with the shielding case of the GIS lightning arrester, the sleeve and a contact in the shielding case rub against each other, and the purpose of automatically connecting the GIS lightning arrester into a test loop is achieved.

Description

Technical Field

[0001] This invention relates to the field of electrical testing technology, specifically to an electrical testing fixture for GIS surge arresters. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) surge arresters are key devices used in GIS to limit lightning overvoltages and switching overvoltages, protecting the GIS equipment by absorbing and releasing overvoltage energy. In accordance with relevant standards, every GIS surge arrester undergoes electrical tests, including continuous current tests, nominal discharge current residual voltage tests, power frequency reference voltage tests, and internal partial discharge tests, to assess its electrical performance.

[0003] During the electrical testing of GIS surge arresters, the test circuit needs to be disconnected beforehand. After the GIS surge arrester is connected to the circuit, the electrical performance of the GIS surge arrester is tested through the detection circuit. Because there are a large number of GIS surge arresters to be tested, the installation and removal of GIS surge arresters is relatively troublesome, so further improvements can be made. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an electrical testing fixture for GIS surge arresters, which has advantages such as automatically connecting GIS surge arresters to the test circuit, thus solving the problem of cumbersome operation when connecting GIS surge arresters to the circuit.

[0005] (II) Technical Solution To achieve the aforementioned objective of automatically connecting the GIS surge arrester to the test circuit, this invention provides the following technical solution: an electrical testing fixture for a GIS surge arrester, comprising a placement platform, a can-type switch disposed on the right side of the placement platform, a first contact and a second contact slidably connected to both ends of the can-type switch, the first contact being used to connect to the shielding cover on the center conductor of the basin-type insulator at the upper end of the GIS surge arrester; a spacing adjustment component and a rotation drive component are disposed on the surface of the first contact, the spacing adjustment component being used to drive the first contact to move in the left-right direction, and the rotation drive component being used to drive the first contact to rotate; a clamping assembly is disposed inside the placement platform, the clamping assembly being used to clamp and fix the GIS surge arrester; a switch drive component is disposed between the can-type switch and the second contact, the switch drive component being used to drive the second contact to move in the left-right direction and to make the second contact contact or separate from the first contact.

[0006] Preferably, the placement platform has an clearance groove at the center of its top, two receiving grooves on its top, and an installation groove communicating with the receiving grooves inside the placement platform. The installation groove is used to accommodate the clamping component.

[0007] Preferably, the can-type switch includes a housing, with basin-type insulators fixedly installed at both ends of the housing, a docking cylinder fixedly installed at the left end of the housing, a sealing ring fixedly installed at the left end of the docking cylinder, an extension at the bottom of the docking cylinder, a straight groove in the lower half of the docking cylinder, an arc-shaped plate attached to the bottom of the docking cylinder to seal the straight groove, a slide rail welded to the bottom of the docking cylinder, a transverse track at the bottom of the slide rail, and the housing is filled with sulfur hexafluoride gas.

[0008] Preferably, the first contact includes a crossbar that is slidably connected to the center of the end of the can switch. A sleeve is fixedly installed on the left end of the crossbar, and a first extension ring is fixedly installed on the left end of the sleeve. A sleeve is fitted on the outside of the crossbar, and a second extension ring is fixedly installed on the left end of the sleeve. A sliding post is fixedly installed on the side of the first extension ring and is slidably connected to the second extension ring. A first spring is fixedly installed between the second extension ring and the first extension ring. Two rotating rings are fixedly installed on the surface of the sleeve.

[0009] Preferably, the spacing adjustment component includes a guide rail fixedly installed on the left side wall of the docking cylinder, two sliding frames slidably connected on the guide rail, the top of the sliding frame being rotatably connected to the rotating ring, a fixed frame being fixedly installed between the bottom ends of the two sliding frames, a slider being slidably connected inside the fixed frame, and a transverse pushing component being fixedly installed on the slider.

[0010] Preferably, the transverse pushing component includes a motor fixedly installed at the bottom of the placement platform, the output end of the motor is connected to a drive shaft, a gear is fixedly installed on the top of the drive shaft, a rack plate meshes with the rear side of the gear, and the rack plate is fixedly installed with the slider.

[0011] Preferably, the rotation drive component includes a support frame fixedly mounted on the surface of the guide rail. A retaining ring is fixedly mounted on the top of the support frame. A rotating wheel is rotatably connected inside the retaining ring. The rotating wheel is sleeved on the outside of the sleeve and is located between two rotating rings. A series of protruding strips are fixedly arranged on the surface of the sleeve located between the two rotating rings. A series of sliding grooves are opened on the inner wall of the rotating wheel. The rotating wheel is slidably connected to the protruding strips through the sliding grooves. A transmission component is provided between the side of the rotating wheel and the drive shaft.

[0012] Preferably, the transmission component includes a transmission shaft rotatably connected to the side of the placement platform. A passive bevel gear is fixedly installed at one end of the transmission shaft near the drive shaft, and an active bevel gear is fixedly installed on the surface of the drive shaft. The passive bevel gear and the active bevel gear mesh with each other. A first sprocket is fixedly installed at the right end of the transmission shaft, and a second sprocket is fixedly installed on the side of the rotating wheel. The first sprocket and the second sprocket are connected by a ring chain.

[0013] Preferably, the clamping assembly includes a planar threaded disc fixedly installed at the center of the top of the gear. Two threaded blocks are threadedly connected to the top of the planar threaded disc. An extension arm is fixedly installed on the opposite side of each of the two threaded blocks. A pressure plate is fixedly installed on the top of the extension arm at the end away from the threaded block. Two support rods are slidably connected through each pressure plate. A clamping plate is fixedly installed between the two support rods. A second spring is fixedly installed between the pressure plate and the clamping plate.

[0014] Preferably, the switch drive includes an inner cylinder disposed inside the can-type switch, the opening of the inner cylinder facing the first contact, a fixing beam fixedly installed between the outer wall of the inner cylinder and the inner wall of the can-type switch, the second contact being slidably connected through and slidably connected to the center of the inner cylinder, a mating cover being fixedly installed at the end of the second contact facing the first contact, a sliding disk being fixedly installed on the surface of the second contact, the sliding disk being slidably connected inside the inner cylinder; a vent pipe is connected to the bottom of the inner cylinder away from the first contact, the vent pipe extending from the bottom of the can-type switch, a piston cylinder being connected to the end of the vent pipe away from the inner cylinder, the piston center of the piston cylinder being fixedly installed to the cylinder output end.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides an electrical testing fixture for GIS surge arresters, which has the following advantages: 1. In this electrical testing fixture for GIS surge arresters, after the slider is attached to the surface of the fixed frame, the rack plate pulls the fixed frame and sliding frame closer to the placement platform via the slider, thereby driving the sleeve, crossbar, and bushing closer to the placement platform, so that the bushing is attached to the contacts inside the shield of the GIS surge arrester; the drive shaft drives the active bevel gear to rotate, thereby driving the passive bevel gear, drive shaft, and first sprocket to rotate, and then drives the rotating wheel to rotate through the first sprocket, second sprocket, and ring chain, thereby driving the sleeve to rotate. In summary, the bushing rotates while moving closer to the placement platform, so that while the bushing is docking with the shield of the GIS surge arrester, the bushing and the contacts inside the shield rub against each other, thereby achieving the purpose of automatically connecting the GIS surge arrester to the test circuit; 2. This electrical testing fixture for GIS surge arresters, after the bushing is connected to the GIS surge arrester, separates the crossbar from the docking cover, and the test circuit is in an open circuit state. Then, by extending the output end of the cylinder, the gas inside the piston cylinder passes through the gas guide pipe into the inner cylinder, driving the sliding plate and the second contact to move closer to the crossbar. The gas pressure inside the inner cylinder ensures the pressure between the docking cover and the crossbar, so that the crossbar and the docking cover are stably connected together. Thus, after the GIS surge arrester is connected to the circuit, the circuit is in an open circuit state. When the circuit is connected, the connection point is in sulfur hexafluoride gas to avoid generating electric sparks and ensure the safety and reliability of the testing process. 3. When disassembling the GIS surge arrester, the electrical testing fixture for this GIS surge arrester requires first driving the second contact to separate from the crossbar, then moving the bushing away from the end of the GIS surge arrester, and keeping the mating cover and crossbar separated. At this time, the distance between the two crossbars is greater than the length of the GIS surge arrester. When installing a new GIS surge arrester, the test circuit is still in an open circuit state to ensure safety when installing the GIS surge arrester. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an electrical testing fixture for a GIS surge arrester proposed in this invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of an electrical testing fixture for GIS surge arresters proposed in this invention; Figure 3 This is a three-dimensional cross-sectional view of the placement platform of the electrical testing fixture for a GIS surge arrester proposed in this invention. Figure 4 This is a three-dimensional cross-sectional view of the tank-type switch of the electrical testing fixture for a GIS surge arrester proposed in this invention; Figure 5 This is a three-dimensional structural diagram of the first contact of an electrical testing fixture for a GIS surge arrester proposed in this invention; Figure 6 This is a three-dimensional structural diagram of the spacing adjustment component of the electrical testing fixture for GIS surge arresters proposed in this invention; Figure 7 This is a three-dimensional structural diagram of the transmission component in the rotation drive of the electrical testing fixture for a GIS surge arrester proposed in this invention; Figure 8 This is a three-dimensional structural diagram of the transverse moving pusher and transmission component of an electrical testing fixture for a GIS surge arrester proposed in this invention. Figure 9 This is a three-dimensional structural diagram of the clamping assembly of an electrical testing fixture for GIS surge arresters proposed in this invention; Figure 10 This is a three-dimensional structural diagram of the switch drive component of an electrical testing fixture for a GIS surge arrester proposed in this invention.

[0017] In the diagram: 100, placement platform; 200, can switch; 300, first contact; 400, second contact; 500, spacing adjustment component; 600, rotation drive component; 700, clamping assembly; 800, switch drive component; 101. Clearance groove; 102. Receiving groove; 103. Mounting groove; 201. Housing; 202. Pot-type insulator; 203. Connecting cylinder; 204. Sealing ring; 205. Extension; 206. Straight groove; 207. Arc plate; 208. Slide carriage; 209. Transverse track; 301. Crossbar; 302. Sleeve; 303. First extension ring; 304. Sleeve; 305. Second extension ring; 306. Sliding column; 307. First spring; 308. Rotary ring; 401. Docking cover; 501. Guide rail; 502. Sliding frame; 503. Fixing frame; 504. Slider; 505. Motor; 506. Drive shaft; 507. Gear; 508. Rack plate; 601. Support frame; 602. Inserted ring; 603. Rotary wheel; 604. Raised bar; 605. Slide groove; 606. Drive shaft; 607. Driven bevel gear; 608. Driven bevel gear; 609. First sprocket; 610. Second sprocket; 611. Ring chain; 701. Flat threaded disc; 702. Threaded block; 703. Extension arm; 704. Pressure plate; 705. Support rod; 706. Clamping plate; 707. Second spring; 801. Inner tube; 802. Fixed beam; 803. Sliding disc; 804. Air guide pipe; 805. Piston cylinder; 806. Cylinder. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-2 An electrical testing fixture for a GIS surge arrester includes a placement platform 100. A can-type switch 200 is disposed on the right side of the placement platform 100. A first contact 300 and a second contact 400 are slidably connected to both ends of the can-type switch 200. The first contact 300 is used to connect to the center conductor of the basin-type insulator of the GIS surge arrester. A spacing adjustment component 500 and a rotation drive component 600 are disposed on the surface of the first contact 300. The spacing adjustment component 500 is used to drive the first contact 300 to move in the left and right direction, and the rotation drive component 600 is used to drive the first contact 300 to rotate. A clamping assembly 700 is disposed inside the placement platform 100 for clamping and fixing the GIS surge arrester. A switch drive component 800 is disposed between the can-type switch 200 and the second contact 400 for driving the second contact 400 to move in the left and right direction and to make the second contact 400 contact or separate from the first contact 300.

[0020] Please see Figure 3The placement platform 100 has a clearance groove 101 at the center of its top to allow clearance for the protruding part in the middle of the GIS surge arrester. The top of the placement platform 100 has two receiving grooves 102, arranged left and right. The protruding parts at both ends of the GIS surge arrester are inserted into the receiving grooves 102, which limit the movement of the GIS surge arrester, allowing it to be stably placed on the placement platform 100. The placement platform 100 has an installation groove 103 inside that communicates with the receiving grooves 102, for accommodating the clamping assembly 700.

[0021] Please see Figure 4 The can-type switch 200 includes a housing 201, with basin-type insulators 202 fixedly installed at both ends of the housing 201. A docking cylinder 203 is fixedly installed at the left end of the housing 201, and a sealing ring 204 is installed on the flange face of the left end of the docking cylinder 203. An extension 205 is provided at the bottom of the docking cylinder 203, and a straight groove 206 is opened in the lower half of the docking cylinder 203. An arc-shaped plate 207 is attached to the bottom of the docking cylinder 203, sealing the straight groove 206. A slide 208 is welded to the bottom of the docking cylinder 203, and a transverse track 209 is provided at the bottom of the slide 208. The housing 201 is filled with sulfur hexafluoride gas. After the GIS surge arrester is placed on top of the placement platform 100, the docking cylinder 203 is pushed to the left, and the slide 208 slides on the transverse track 209, so that the docking cylinder 203 aligns with the housing of the GIS surge arrester, and the top shield of the GIS surge arrester is inserted into the docking cylinder 203.

[0022] Please see Figures 4-5 The first contact 300 includes a crossbar 301, which is slidably connected to the center of the end of the tank switch 200. Specifically, the crossbar 301 is slidably connected to the center of the basin insulator 202. A sleeve 302 is fixedly installed near the left end of the crossbar 301. The sleeve 302 is used to connect with the center conductor of the basin insulator of the GIS surge arrester, that is, the sleeve 302 is connected to the contact inside the shielding cover.

[0023] A first extension ring 303 is fixedly installed on the left end of the sleeve 302. A sleeve 304 is sleeved on the outside of the crossbar 301, and the end of the sleeve 304 is provided with a receiving cavity for accommodating the sleeve 302. A second extension ring 305 is fixedly installed on the left end of the sleeve 304. A sliding post 306 is fixedly installed on the side of the first extension ring 303. The sliding post 306 is slidably connected to the second extension ring 305. A first spring 307 is fixedly installed between the second extension ring 305 and the first extension ring 303. The elasticity of the first spring 307 causes the first extension ring 303 to tend to move away from the second extension ring 305.

[0024] Therefore, when the crossbar 301 and bushing 302 approach the GIS surge arrester, the center conductor of the basin-type insulator of the GIS surge arrester can be inserted into the bushing 302. When the rotating drive 600 drives the bushing 302 to rotate, the bushing 302 rubs against the surface of the contact inside the shielding cover, which can prevent dirt from existing between the bushing 302 and the contact inside the shielding cover. After the crossbar 301 moves a certain distance, the bushing 302 fits against the contact inside the shielding cover, and the first spring 307 is compressed. Through the pressure of the first spring 307, the bushing 302 is tightly connected to the contact inside the shielding cover. Two rotating rings 308 are fixedly installed on the surface of the sleeve 304.

[0025] Please see Figure 3 , Figure 6 and Figure 8 The spacing adjustment component 500 includes a guide rail 501 fixedly installed on the right side of the placement platform 100. Two sliding frames 502 are slidably connected to the guide rail 501. The sliding frames 502 are inverted L-shaped and have annular structures at their ends. The top of the sliding frames 502 is rotatably connected to a rotating ring 308. The guide rail 501 and the sliding frames 502 cooperate to support the sleeve 304, thus ensuring relative stability when the crossbar 301 moves in the left and right directions. A fixed frame 503 is fixedly installed between the bottom ends of the two sliding frames 502. A slider 504 is slidably connected within the fixed frame 503. The slider 504 is slidably connected within the straight groove 206 and is fixedly mounted on the arc plate 207. During the sliding of the slider 504, the arc plate 207 maintains a sealing effect on the straight groove 206. A transverse pushing component is fixedly installed on the slider 504. The transverse pushing component drives the slider 504 to move in the left and right directions. When the lateral pusher drives the slider 504 to approach the placement stage 100, the slider 504 first slides along the fixed frame 503, and then the slider 504 adheres to the inner wall of the fixed frame 503, pushing the fixed frame 503, the sliding frame 502 and the sleeve 304 to move together.

[0026] The transverse pushing component includes a motor 505 fixedly installed at the bottom of the placement platform 100. The output end of the motor 505 is connected to a drive shaft 506. A gear 507 is fixedly installed on the top of the drive shaft 506. A rack plate 508 meshes with the rear side of the gear 507. The rack plate 508 is fixedly installed with the slider 504.

[0027] Please see Figures 5-8The rotating drive component 600 includes a support frame 601 fixedly mounted on the surface of the guide rail 501. The support frame 601 is L-shaped, and a retaining ring 602 is fixedly mounted on the top of the support frame 601. A rotating wheel 603 is rotatably connected inside the retaining ring 602. The rotating wheel 603 is sleeved on the outside of the sleeve 304 and is located between two rotating rings 308. The support frame 601 and the retaining ring 602 support the rotating wheel 603 and prevent the rotating wheel 603 from moving with the sleeve 304 in the left and right direction. The surface of the sleeve 304 between the two rotating rings 308 has an array of protruding strips 604 fixedly attached. The inner wall of the rotating wheel 603 has an array of sliding grooves 605. The rotating wheel 603 is slidably connected to the protruding strips 604 through the sliding grooves 605. Thus, when the rotating wheel 603 rotates, the sleeve 304 is driven to rotate synchronously through the cooperation of the protruding strips 604 and the sliding grooves 605. During this process, the sleeve 304 can slide relative to the rotating wheel 603. A transmission component is provided between the side of the rotating wheel 603 and the drive shaft 506. Through the transmission component, the rotating wheel 603 is driven to rotate when the drive shaft 506 rotates.

[0028] The transmission component includes a drive shaft 606 rotatably connected to the side of the placement platform 100, extending into the extension 205. A driven bevel gear 607 is fixedly mounted on one end of the drive shaft 606 near the drive shaft 506, and a driving bevel gear 608 is fixedly mounted on the surface of the drive shaft 506. The driven bevel gear 607 and the driving bevel gear 608 mesh with each other. A first sprocket 609 is fixedly mounted on the right end of the drive shaft 606, and the first sprocket 609 is located inside the extension 205. A second sprocket 610 is fixedly mounted on the side of the rotating wheel 603, and the first sprocket 609 and the second sprocket 610 are connected by a ring chain 611.

[0029] Please see Figure 9 The clamping assembly 700 includes a flat threaded disk 701 fixedly mounted at the center of the top of the gear 507. Two threaded blocks 702 are threadedly connected to the top of the flat threaded disk 701. An extension arm 703 is fixedly mounted on the opposite side of each threaded block 702. A pressure plate 704 is fixedly mounted on the top of the end of each extension arm 703 away from the threaded block 702. The threaded blocks 702, extension arms 703, and pressure plate 704 slide within the mounting groove 103. When the motor 505 drives the gear 507 to rotate, it drives the flat threaded disk 701 to rotate synchronously, thereby causing the two threaded blocks 702 to move simultaneously towards each other or simultaneously away from each other.

[0030] Each pressure plate 704 has two sliding supports 705 connected through it. A clamping plate 706 is fixedly installed between the two supports 705. The side of the clamping plate 706 away from the pressure plate 704 is attached to the protrusion of the insertion receiving groove 102 of the GIS surge arrester. A second spring 707 is fixedly installed between the pressure plate 704 and the clamping plate 706. Thus, as the slider 504 slides along the fixed frame 503 and moves closer to the placement platform 100, the flat threaded disc 701 drives the two threaded blocks 702 to move in opposite directions. The pressure plate 704 compresses the second spring 707, increasing the pressure between the clamping plate 706 and the GIS surge arrester. When the slider 504 pushes the fixed frame 503, the sliding frame 502, the sleeve 304 and the crossbar 301 to move, the pressure plate 704 further compresses the second spring 707.

[0031] Please see Figure 1 , Figure 4 and Figure 10 The switch drive unit 800 includes an inner cylinder 801 disposed inside the can-type switch 200. The opening of the inner cylinder 801 faces the first contact 300. A fixing beam 802, made of insulating material, is fixedly installed between the outer wall of the inner cylinder 801 and the inner wall of the can-type switch 200. A second contact 400 is slidably connected through the center of the inner cylinder 801. A mating cover 401 is fixedly installed at the end of the second contact 400 facing the first contact 300, and a crossbar 301 is inserted into the mating cover 401. A sliding disk 803 is fixedly installed on the surface of the second contact 400 and is slidably connected inside the inner cylinder 801.

[0032] A gas guide pipe 804 is connected to the bottom of the inner cylinder 801, away from the first contact 300. The gas guide pipe 804 extends from the bottom of the canister switch 200, and the end of the gas guide pipe 804 away from the inner cylinder 801 is connected to a piston cylinder 805, which is also filled with sulfur hexafluoride gas. The piston center of the piston cylinder 805 is fixedly installed to the output end of the cylinder 806. When the output end of the cylinder 806 extends, the gas inside the piston cylinder 805 enters the inner cylinder 801, causing the sliding disc 803 and the second contact 400 to move closer to the crossbar 301, and connecting the mating cover 401 to the crossbar 301. Similarly, when the output end of the cylinder 806 retracts, the gas inside the inner cylinder 801 enters the piston cylinder 805, causing the second contact 400 to move away from the crossbar 301.

[0033] When in use, the GIS surge arrester is placed on top of the placement platform 100, and the protruding parts at both ends of the GIS surge arrester are inserted into the receiving groove 102; by pushing the docking cylinder 203 to the left, the slide 208 slides along the transverse track 209, so that the sealing ring 204 fits against the housing flange of the GIS surge arrester, and the docking cylinder 203 is inserted into the shielding cover at the end of the GIS surge arrester. Then, the motor 505 drives the drive shaft 506 and gear 507 to rotate, which drives the rack plate 508 to move to the left, thereby driving the slider 504 to slide inside the fixed frame 503. At the same time, the gear 507 drives the flat threaded disk 701 to rotate synchronously. The flat threaded disk 701 drives the two threaded blocks 702 to move in opposite directions. The pressure plate 704 squeezes the second spring 707, increasing the pressure between the clamping plate 706 and the GIS surge arrester, and fixing the GIS surge arrester. After the slider 504 is attached to the surface of the fixed frame 503, the rack plate 508 pulls the fixed frame 503 and the sliding frame 502 closer to the placement platform 100 through the slider 504, thereby driving the sleeve 304, the crossbar 301 and the bushing 302 closer to the placement platform 100, so that the bushing 302 is attached to the contact inside the shield at the end of the GIS surge arrester. The drive shaft 506 drives the active bevel gear 608 to rotate, which in turn drives the passive bevel gear 607, the drive shaft 606 and the first sprocket 609 to rotate. Then, the first sprocket 609, the second sprocket 610 and the ring chain 611 drive the rotating wheel 603 to rotate, which in turn drives the sleeve 304 to rotate. In summary, the sleeve 302 rotates and moves closer to the placement platform 100, so that the sleeve 302 docks with the shield at the end of the GIS surge arrester. At the same time, the sleeve 302 rotates relative to the shield and makes full contact with the contacts inside the shield. After the bushing 302 is connected to the contact inside the shield of the GIS surge arrester, the crossbar 301 is separated from the docking cover 401, and the test circuit is in an open circuit state. Then, the output end of the cylinder 806 extends, allowing the gas inside the piston cylinder 805 to pass through the air guide pipe 804 and enter the inner cylinder 801, driving the sliding plate 803 and the second contact 400 to move closer to the crossbar 301. The air pressure inside the inner cylinder 801 ensures the pressure between the docking cover 401 and the crossbar 301, so that the crossbar 301 and the docking cover 401 are stably connected together.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A GIS surge arrester electrical testing fixture, comprising a placement platform (100), characterized in that: A can-type switch (200) is provided on the right side of the placement platform (100). The two ends of the can-type switch (200) are respectively slidably connected with a first contact (300) and a second contact (400). The first contact (300) is used to connect with the shielding cover on the center conductor of the basin-type insulator at the upper end of the GIS surge arrester. The surface of the first contact (300) is provided with a spacing adjustment member (500) and a rotation drive member (600). The spacing adjustment member (500) is used to drive the first contact (300) to move in the left and right direction, and the rotation drive member (600) is used to drive the first contact (300) to rotate. The placement platform (100) is provided with a clamping assembly (700) inside, which is used to clamp and fix the GIS surge arrester; A switch driver (800) is provided between the can switch (200) and the second contact (400). The switch driver (800) is used to drive the second contact (400) to move in the left and right direction and to make the second contact (400) contact or separate from the first contact (300).

2. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The placement platform (100) has a clearance groove (101) at the top center, and two receiving grooves (102) on the top of the placement platform (100). The placement platform (100) has an installation groove (103) inside that communicates with the receiving grooves (102). The installation groove (103) is used to accommodate the clamping assembly (700).

3. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The can-type switch (200) includes a housing (201), with basin-type insulators (202) fixedly installed at both ends of the housing (201). A docking cylinder (203) is fixedly installed at the left end of the housing (201), and a sealing ring (204) is fixedly installed at the left end of the docking cylinder (203). An extension (205) is provided at the bottom of the docking cylinder (203). A straight groove (206) is opened in the lower half of the docking cylinder (203). An arc plate (207) is attached to the bottom of the docking cylinder (203), and the arc plate (207) seals the straight groove (206). A slide (208) is welded to the bottom of the docking cylinder (203), and a transverse track (209) is provided at the bottom of the slide (208). The housing (201) is filled with sulfur hexafluoride gas.

4. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The first contact (300) includes a crossbar (301), which is slidably connected to the center of the end of the can switch (200). A sleeve (302) is fixedly installed on the left end of the crossbar (301), and a first extension ring (303) is fixedly installed on the left end of the sleeve (302). A sleeve (304) is fitted on the outside of the crossbar (301). A second extension ring (305) is fixedly installed on the left end of the sleeve (304). A sliding column (306) is fixedly installed on the side of the first extension ring (303). The sliding column (306) is slidably connected to the second extension ring (305). A first spring (307) is fixedly installed between the second extension ring (305) and the first extension ring (303). Two rotating rings (308) are fixedly installed on the surface of the sleeve (304).

5. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The spacing adjustment component (500) includes a guide rail (501) fixedly installed on the left side wall of the docking cylinder (203). Two sliding frames (502) are slidably connected on the guide rail (501). The top of the sliding frame (502) is rotatably connected to the rotating ring (308). A fixed frame (503) is fixedly installed between the bottom ends of the two sliding frames (502). A slider (504) is slidably connected inside the fixed frame (503). A transverse pushing component is fixedly installed on the slider (504).

6. The electrical testing fixture for GIS surge arresters according to claim 5, characterized in that: The transverse pushing component includes a motor (505) fixedly installed at the bottom of the placement platform (100). The output end of the motor (505) is connected to a drive shaft (506). A gear (507) is fixedly installed on the top of the drive shaft (506). A rack plate (508) meshes with the rear side of the gear (507). The rack plate (508) is fixedly installed with the slider (504).

7. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The rotating drive component (600) includes a support frame (601) fixedly mounted on the surface of the guide rail (501). A retaining ring (602) is fixedly mounted on the top of the support frame (601). A rotating wheel (603) is rotatably connected inside the retaining ring (602). The rotating wheel (603) is sleeved on the outside of the sleeve (304) and is located between two rotating rings (308). A convex strip (604) is fixedly arranged on the surface of the sleeve (304) between the two rotating rings (308). A sliding groove (605) is arranged in an array on the inner wall of the rotating wheel (603). The rotating wheel (603) is slidably connected to the convex strip (604) through the sliding groove (605). A transmission component is provided between the side of the rotating wheel (603) and the drive shaft (506).

8. The electrical testing fixture for GIS surge arresters according to claim 7, characterized in that: The transmission component includes a transmission shaft (606) rotatably connected to the side of the placement platform (100). A passive bevel gear (607) is fixedly installed at one end of the transmission shaft (606) near the drive shaft (506), and an active bevel gear (608) is fixedly installed on the surface of the drive shaft (506). The passive bevel gear (607) and the active bevel gear (608) mesh with each other. A first sprocket (609) is fixedly installed at the right end of the transmission shaft (606), and a second sprocket (610) is fixedly installed on the side of the rotating wheel (603). The first sprocket (609) and the second sprocket (610) are connected by a ring chain (611).

9. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The clamping assembly (700) includes a flat threaded disk (701) fixedly installed at the center of the top of the gear (507). The top of the flat threaded disk (701) is threaded with two threaded blocks (702). An extension arm (703) is fixedly installed on the opposite side of the two threaded blocks (702). A pressure plate (704) is fixedly installed on the top of the end of the extension arm (703) away from the threaded block (702). Two support rods (705) are slidably connected through each of the pressure plates (704), and a clamping plate (706) is fixedly installed between the two support rods (705). A second spring (707) is fixedly installed between the pressure plate (704) and the clamping plate (706).

10. The electrical testing fixture for GIS surge arresters according to claim 1, characterized in that: The switch drive unit (800) includes an inner tube (801) disposed inside the can switch (200), the opening of the inner tube (801) facing the first contact (300), a fixing beam (802) fixedly installed between the outer wall of the inner tube (801) and the inner wall of the can switch (200), the second contact (400) being slidably connected through the center of the inner tube (801), a mating cover (401) fixedly installed at one end of the second contact (400) facing the first contact (300), and a sliding disk (803) fixedly installed on the surface of the second contact (400), the sliding disk (803) being slidably connected inside the inner tube (801); The bottom of the inner cylinder (801) away from the first contact (300) is connected to a gas guide pipe (804). The gas guide pipe (804) extends out from the bottom of the can switch (200). The end of the gas guide pipe (804) away from the inner cylinder (801) is connected to a piston cylinder (805). The piston center of the piston cylinder (805) is fixedly installed with the output end of the cylinder (806).

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