A withstand voltage testing device for power cables

Abstract

This invention discloses a withstand voltage testing device for power cables, relating to the field of cable withstand voltage testing technology. It includes a chamber with a first top plate fixed to one side of its top. A traction assembly is provided on one side of the top of the first top plate. A clamping and moving assembly slides along the inner wall of the chamber. A conveying assembly is provided on the side of the chamber away from the first top plate. The traction assembly includes a housing fixedly connected to one side of the top of the first top plate. This invention, through the traction assembly, allows the cable to pass through multiple sets of clamping and moving assemblies in withstand voltage testing oil and connect with the testing instrument, avoiding the need for operators to spend a significant amount of time manually threading and connecting the cable. Furthermore, since withstand voltage testing oil is first injected into the chamber before the cable is placed inside for withstand voltage testing, it also avoids the need for operators to put their hands into the withstand voltage testing oil.

Description

Technical Field

[0001] This invention relates to the field of cable withstand voltage testing technology, specifically to a withstand voltage testing device for power cables. Background Technology

[0002] A cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. It is usually a cable that is like a rope, made up of several or several groups of conductors twisted together. Each group of conductors is insulated from each other and is often twisted around a central core. The entire cable is covered with a highly insulating outer layer. Cables have the characteristics of being energized internally and insulated externally.

[0003] An existing patent (application number: 202110382354.7) discloses a power cable withstand voltage test equipment. It injects withstand voltage test oil into the insulation chamber, and then drives two rotatable rings in the same group to move closer or disengage through the meshing relationship between the limiting threaded rod and the rotatable ring. When the two rotatable rings disengage, the torsion spring set on the rotating shaft provides resistance and causes the connecting arm to drive the adjacent clamping bar and the adjacent fixed ring to move closer together. The sliding spring set in the connecting groove and the compression spring set in the clamping cylinder provide a restoring force to ensure the device resets. This changes the distance between the two adjacent fixed rings, and further changes the radius of the test cable, thereby meeting the needs of different test models of cables.

[0004] However, the above technical solution still has certain defects. When the device tests the cable, it first injects withstand voltage testing oil into the insulation chamber, and then passes the cable through multiple sets of fixing mechanisms to connect with the tester for testing. However, when connecting the cable, the operator needs to manually reach into the insulation chamber to pass the cable through multiple sets of fixing mechanisms to connect with the tester, which takes too long and reduces the efficiency of cable testing. Therefore, a withstand voltage testing device for power cables is proposed. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a withstand voltage testing device for power cables to solve the technical problems mentioned in the background above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a withstand voltage testing device for power cables, comprising a heat exchange chamber, a first top plate fixed to one side of the top of the heat exchange chamber, and a second top plate fixed to the end of the top of the heat exchange chamber away from the first top plate, a traction component provided on one side of the top of the first top plate, a clamping and moving component slidably connected to the inner wall of the heat exchange chamber, and a conveying component provided at the bottom of the second top plate;

[0007] The traction assembly includes a housing fixedly connected to one side of the top of the first top plate. A winding shaft is rotatably connected inside the housing. A rope is provided on the surface of the winding shaft, and both ends of the winding shaft are connected to the housing via spring coils. A movable block is fixed to the bottom end of the rope. A circular shaft is rotatably connected inside the movable block. Eight sets of vertical plates are fixedly connected to the surface of the circular shaft. L-shaped grooves matching the circular shaft are formed on both sides of the inner wall of the insulation chamber. An arc-shaped rod is fixed to one side of each of the eight sets of vertical plates, and the surface of the arc-shaped rod slides. An arc-shaped cylinder is slidably connected to the arc-shaped cylinder, and a connecting pipe is provided on one side of the arc-shaped cylinder. The movable block is located on one side... Eight sets of fixing blocks are welded on. The end of the connecting pipe away from the arc-shaped cylinder is rotatably connected to a telescopic rod via a damping shaft. The end of the telescopic rod away from the connecting pipe is fixed with an arc-shaped clamp. One end of the round shaft is rotatably connected to a belt. The surface of the belt is provided with a moving rod, and the end of the belt's inner wall away from the round shaft is rotatably connected to a rotating shaft. The moving rod, rotating shaft, and belt are driven by a pulley. A connecting block is fixed at the bottom of the insulation chamber. A long shaft is rotatably connected inside the connecting block. A movable plate is fixedly connected to the surface of the long shaft, and torsion springs are provided at both ends of the long shaft.

[0008] In summary, the present invention has the following main beneficial effects:

[0009] 1. This invention moves a movable block along an L-shaped groove using a movable rod. The arc-shaped clamps change from a vertical to a horizontal position under the action of the movable plate until the cable passes between two sets of arc-shaped clamps. At this point, the rotating shaft rotates to clamp and fix the cable in place. The movable rod then resets, allowing the cable to connect with the testing instrument for inspection. The traction assembly allows the cable to pass through multiple clamping and moving components in the withstand voltage testing oil before connecting with the testing instrument, avoiding the need for workers to spend a significant amount of time manually threading and connecting the cable. Furthermore, since withstand voltage testing oil is first injected into the insulation chamber before the cable is placed inside for withstand voltage testing, it also prevents workers from inserting their hands into the oil. This component further improves the efficiency of cable testing.

[0010] 2. This invention inserts the cable into a square base, where ball bearings facilitate initial bending of the cable within the base. Simultaneously, the arc-shaped plate and the fourth spring compress the cable, allowing its surface to better conform to the surface of the conveyor wheel, facilitating subsequent cable transport. Gears and ratchet gears drive the conveyor shaft and conveyor wheel to rotate synchronously, transporting the cable through clamps on four sets of moving shafts. The conveyor wheel effectively prevents the cable from twisting or abutting during 90-degree bending transport, ensuring better transport. Attached Figure Description

[0011] Figure 1This is a three-dimensional schematic diagram of the overall components of the present invention;

[0012] Figure 2 This is a three-dimensional schematic diagram of the interior of the insulation chamber of the present invention;

[0013] Figure 3 This is a three-dimensional schematic diagram of the L-shaped groove of the present invention;

[0014] Figure 4 This is a three-dimensional schematic diagram of the interior of the housing of the present invention;

[0015] Figure 5 This is a three-dimensional schematic diagram of the interior of the movable block of the present invention;

[0016] Figure 6 This is a three-dimensional schematic diagram of the interior of the fixing block of the present invention;

[0017] Figure 7 This is a three-dimensional schematic diagram of the interior of the movable rod of the present invention;

[0018] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle;

[0019] Figure 9 This is a three-dimensional schematic diagram of the movable plate of the present invention;

[0020] Figure 10 This is a three-dimensional schematic diagram of the clamping and moving component of the present invention;

[0021] Figure 11 This is a three-dimensional schematic diagram of the interior of the moving shaft of the present invention;

[0022] Figure 12 For the present invention Figure 11 Enlarged view at point B in the middle;

[0023] Figure 13 This is a three-dimensional schematic diagram of the conveying component of the present invention;

[0024] Figure 14 This is a three-dimensional schematic diagram of the arc-shaped plate of the present invention;

[0025] Figure 15 This is a three-dimensional schematic diagram of the guide shaft of the present invention.

[0026] In the diagram: 100, Insulation chamber; 110, First roof plate; 120, Detector; 130, Second roof plate; 131, Connector; 140, Cable;

[0027] 200. Traction assembly; 210. Housing; 220. Rewinding shaft; 230. Rope; 240. Moving block; 250. Round shaft; 251. L-shaped groove; 260. Vertical plate; 270. Arc rod; 280. Arc cylinder; 290. Connecting pipe; 2910. Fixing block; 2920. Telescopic rod; 2930. Arc clamp; 2931. Abutment block; 2940. Belt; 2950. Moving rod; 2951. Limiting block; 2952. Limiting groove; 2960. Rotating shaft; 2961. Groove; 2970. First spring; 2980. Square block; 2990. Turntable; 2991. Insert rod; 2992. Slot; 2993. Connecting block; 2994. Long shaft; 2995. Movable plate; 2996. Torsion spring;

[0028] 300. Clamping and moving assembly; 310. Moving shaft; 311. Moving groove; 312. Pull rope; 313. Guide shaft; 320. Slider; 321. Slide groove; 330. Second spring; 340. Support block; 350. Clamping plate; 360. Square cylinder; 370. Third spring; 380. Inclined block; 381. Inclined groove;

[0029] 400. Conveying assembly; 410. L-shaped connecting block; 420. Conveyor belt; 430. Rotating roller; 440. Gear; 450. Ratchet; 460. Conveying shaft; 470. Square seat; 480. Conveying wheel; 490. Arc plate; 491. Base rod; 4910. Ball bearing; 4920. Fourth spring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The embodiments of the present invention will now be described.

[0032] A withstand voltage testing device for power cables, such as Figure 1-15 As shown, the device includes a heat preservation chamber 100, a first top plate 110 fixed to one side of the top of the heat preservation chamber 100, and a second top plate 130 fixed to the end of the top of the heat preservation chamber 100 away from the first top plate 110. A traction component 200 is provided on one side of the top of the first top plate 110, a clamping and moving component 300 is slidably connected to the inner wall of the heat preservation chamber 100, and a conveying component 400 is provided at the bottom of the second top plate 130.

[0033] The traction assembly 200 includes a housing 210 fixedly connected to one side of the top of the first top plate 110. A winding shaft 220 is rotatably connected inside the housing 210. A rope 230 is provided on the surface of the winding shaft 220, and both ends of the winding shaft 220 are connected to the housing 210 through a spring coil. A moving block 240 is fixed to the bottom end of the rope 230. A round shaft 250 is rotatably connected inside the moving block 240. Eight sets of vertical plates 260 are fixedly connected to the surface of the round shaft 250. L-shaped grooves 251 matching the round shaft 250 are opened on both sides of the inner wall of the insulation chamber 100. An arc-shaped rod 270 is fixed to one side of the eight sets of vertical plates 260. The surface of the arc-shaped rod 270 slides; an arc-shaped cylinder 280 is slidably connected to it, and a connecting pipe 290 is provided on one side of the arc-shaped cylinder 280. Eight sets of fixed blocks 2910 are welded to one side of the moving block 240. The end of the connecting pipe 290 away from the arc-shaped cylinder 280 is rotatably connected to a telescopic rod 2920 through a damping shaft. An arc-shaped clamp 2930 is fixed to the end of the telescopic rod 2920 away from the connecting pipe 290. A belt 2940 is rotatably connected to one end of the surface of the round shaft 250. A moving rod 2950 is provided on the surface of the belt 2940, and a rotating shaft is rotatably connected to the end of the inner wall of the belt 2940 away from the round shaft 250. 2960, the moving rod 2950, ​​the rotating shaft 2960, and the belt 2940 are driven by a pulley. A connecting block 2993 is fixed to the bottom of the insulation chamber 100. A long shaft 2994 is rotatably connected inside the connecting block 2993. A movable plate 2995 is fixedly connected to the surface of the long shaft 2994, and torsion springs 2996 are provided at both ends of the long shaft 2994. The clamping and moving assembly 300 includes four sets of moving shafts 310 slidably connected to both sides of the inner wall of the insulation chamber 100. Multiple sets of sliding grooves 321 are opened inside the moving shafts 310, and sliders 320 are slidably connected within the sliding grooves 321. A second spring 330 is fixed on one side of block 320, and a support block 340 is fixed at the bottom of slider 320. A clamping plate 350 is fixed on one side of support block 340. The opening of clamping plate 350 near the first top plate 110 is flared, and the opening of clamping plate 350 near the second top plate 130 is conical. Square cylinders 360 are fixed at the bottom of both sides of four sets of moving shafts 310. A third spring 370 is provided inside the square cylinder 360. An inclined block 380 is slidably connected to the square cylinder 360 at the bottom of the third spring 370. An inclined groove 381 that matches the inclined block 380 is opened inside the insulation chamber 100.

[0034] Insulation is achieved by injecting pressure-resistant test oil into the insulation chamber 100. Workers move the moving rod 2950 downwards, causing it to move synchronously with the moving block 240 via the limiting block 2951 and the round shaft 250. Simultaneously, the rope 230 is pulled, causing the moving block 240 to move synchronously with the fixed block 2910. As the moving block 240 moves along the L-shaped groove 251, the arc-shaped clamp 2930 and the abutment block 2931 come into contact with the movable plate 2995. As the arc-shaped clamp 2930 and the abutment block 2931 continue to move, the movable plate 2995 abuts against the abutment block 2931, causing the arc-shaped clamp 2930 to change from a vertical to a horizontal position. Subsequently, one side of the arc-shaped clamp 2930... The arc-shaped clamping plate 2930 is inserted into the clamping plate 350 near the first top plate 110, causing the clamping plates 350 on both sides to move to the sides. At the same time, the fixing block 2910 will fit against the support block 340, thereby driving a set of moving shafts 310 to move. When the moving shafts 310 move, they will squeeze the third spring 370 through the inclined block 380 to disengage from the inclined groove 381. The continuous movement of the moving shafts 310 will contact the second set of moving shafts 310, causing the clamping plate 350 in the first set of moving shafts 310 to insert into the clamping plate 350 in the second set of moving shafts 310. This process continues until all four sets of moving shafts 310 move. All parts are moved to the side closest to the second top plate 130. A thrust is applied to the moving shaft 310 to one side, while the cable 140 is simultaneously conveyed to the other side, creating opposing forces. This facilitates the cable 140's passage through the multiple clamping plates 350 until it passes between two sets of arc-shaped clamping plates 2930. At this point, the rotating shaft 2960 is rotated, driving the circular shaft 250 via the belt 2940. This causes the circular shaft 250 to rotate synchronously with the vertical plate 260. The vertical plate 260 then moves the arc-shaped rod 270 synchronously, compressing the hydraulic oil inside the arc-shaped cylinder 280. This hydraulic oil enters the connecting pipe 290, and under the pressure of the oil, it moves the telescopic rod 2920 and the arc-shaped clamping plate 2930, clamping and fixing the cable 140. Subsequently... Next, the moving rod 2950 is reset along the L-shaped groove 251, and then the cable 140 is connected to the detector 120 for testing. When the cable 140 is pulled by the arc-shaped clamp 2930, the moving block 240 drives the pull rope 312 to move a set of moving shafts 310. The pull ropes 312 on the four sets of moving shafts 310 can make them move synchronously with the cable 140 until the four sets of moving shafts 310 are evenly distributed in the insulation chamber 100, which can better limit and clamp the cable 140. When the moving rod 2950 moves to the corner of the L-shaped groove 251, the moving rod 2950 is pulled upward, so that the cable 140 moves upward through the guide shaft 313. At the same time, the arc-shaped clamp 2930 will change from horizontal to vertical along with the cable 140.Until docking with the testing instrument 120, the traction component 200 allows the cable 140 to pass through multiple sets of clamping and moving components 300 in the withstand voltage testing oil and dock with the testing instrument 120. This avoids the need for operators to spend a lot of time manually threading and docking the cable 140. Furthermore, since withstand voltage testing oil is first injected into the insulation chamber 100 before the cable 140 is placed inside for withstand voltage testing, this also avoids operators having to put their hands into the withstand voltage testing oil. This component further improves the testing efficiency of the cable 140.

[0035] Please refer to this carefully. Figures 1 to 3 Both the first top plate 110 and the second top plate 130 are provided with a wire connector 131 at the bottom. A cable 140 is inserted into the wire connector 131. A detector 120 is installed at the top of the first top plate 110. One end of the cable 140 is connected to the detector 120.

[0036] By inserting the cable 140 into the plug connector 131 on one side of the second top plate 130, the cable 140 is clamped and fixed by the clamping moving component 300, and finally connected to the tester 120 through the plug connector 131 of the first top plate 110 to perform a withstand voltage test on the cable 140.

[0037] Please refer to this carefully. Figures 4 to 9 A limiting block 2951 is welded to the bottom of the moving rod 2950, ​​and the moving rod 2950 is slidably connected to the first top plate 110. Limiting grooves 2952 that match the limiting block 2951 are opened on both sides of the moving block 240. There are four sets of connecting blocks 2993, and each set is divided into two. There is a rubber pad on one side of the arc surface of the arc-shaped clamping plate 2930, and multiple sets of grooves are provided on the rubber pad. An abutment block 2931 is fixed on one side of the bottom of the arc-shaped clamping plate 2930. A groove 2961 is opened inside the rotating shaft 2960. A first spring 2970 is installed in the groove 2961. A square block 2980 is fixed on one side of the first spring 2970. A turntable 2990 is fixed on the end of the square block 2980 away from the first spring 2970. An insertion rod 2991 is fixed on the side of the turntable 2990 close to the moving rod 2950. Multiple sets of slots 2992 that match the insertion rod 2991 are opened on one side of the moving rod 2950.

[0038] The cooperation between the limiting block 2951 and the limiting groove 2952 can prevent the moving block 240 from rotating synchronously when the rotating shaft 250 is rotated. By pulling the turntable 2990, the square block 2980 is driven to stretch the first spring 2970, which in turn drives the insertion rod 2991 to move synchronously, so that the insertion rod 2991 is disengaged from the slot 2992 to facilitate the rotation of the rotating shaft 2960. At the same time, the cooperation between the insertion rod 2991 and the slot 2992 can limit its movement. By opening a groove on one side of the arc-shaped clamp 2930, the friction with the surface of the cable 140 can be better enhanced, which facilitates better fixation of the cable 140.

[0039] Please refer to this carefully. Figure 2 , Figures 10 to 15 The inner walls of the insulation chamber 100 are provided with moving grooves 311 that match the moving shafts 310. There are four sets of inclined blocks 380 and inclined grooves 381. The width of each set of inclined blocks 380 and inclined grooves 381 decreases from the side near the first top plate 110 to the side near the second top plate 130. The four sets of moving shafts 310 are fixedly connected to the moving blocks 240 by pull ropes 312. The surface of the moving shaft 310 near the first top plate 110 is fixed with a guide shaft 313 for the cable 140 to move horizontally and vertically upward.

[0040] The cooperation of the inclined block 380 and the inclined groove 381 can effectively limit and fix the moving shaft 310. The pull rope 312 makes it easy to pull multiple sets of moving shafts 310. Arranging the size of the inclined block 380 and the inclined groove 381 from large to small can ensure that each set of moving shafts 310 corresponds to the matching inclined groove 381 in turn when resetting.

[0041] Please refer to this carefully. Figure 13 and Figure 14 The conveying assembly 400 includes an L-shaped connecting block 410 fixedly connected to one side of a set of moving shafts 310. A conveyor belt 420 is fixed to the bottom end of the L-shaped connecting block 410. Rotating rollers 430 are rotatably connected to both sides of the inner wall of the conveyor belt 420. A gear 440 is fixed to the surface of the set of rotating rollers 430. A ratchet 450 meshes with the gear 440 on one side. A conveying shaft 460 is fixedly connected to the center of the ratchet 450. Four sets of conveying wheels 480 are fixed to the surface of the conveying shaft 460. A square seat 470 is fixed to the inner wall of the insulation chamber 100 on the side away from the first top plate 110. The conveying shaft 460 is rotatably connected to the square seat 470. An arc plate 490 is provided on one side of the four sets of conveying wheels 480. A base rod 491 is rotatably connected to the upper end of the arc plate 490. Several sets of balls 4910 are rotatably connected to the side of the arc plate 490 near the conveying wheels 480. A fourth spring 4920 is provided on the side of the arc plate 490 away from the balls 4910.

[0042] Workers insert cable 140 into square seat 470 through connector 131 on second top plate 130. Ball bearings 4910 facilitate initial bending of cable 140 within square seat 470. Simultaneously, the arc plate 490 and fourth spring 4920 apply pressure to cable 140, ensuring better contact between cable 140 and conveyor wheel 480 for subsequent transport. When the four sets of moving shafts 310 move, they synchronously move the L-shaped connecting block 410 at the end of one set of moving shafts 310, causing the L-shaped connecting block to... Block 410 drives the conveyor belt 420 to move, which in turn drives the rotating rollers 430 on both sides to rotate. The rotating rollers 430 drive the gear 440 to rotate, which in turn drives the ratchet 450 to rotate synchronously. The ratchet 450 drives the conveyor shaft 460 and the conveyor wheel 480 to rotate synchronously. The belt conveys the cable 140 through the conveyor wheel 480 and passes through the clamps 350 on the four sets of moving shafts 310. The conveyor wheel 480 can effectively prevent the cable 140 from abutting and twisting when it is conveyed at a 90-degree bend, which facilitates better conveying.

[0043] In use, insulation is achieved by injecting pressure-resistant test oil into the insulation chamber 100. The operator inserts the cable 140 into the square seat 470, where the ball bearing 4910 facilitates initial bending of the cable 140 within the square seat 470. Simultaneously, the arc-shaped plate 490 and the fourth spring 4920 apply pressure to the cable 140, allowing its surface to better conform to the surface of the conveyor wheel 480, facilitating subsequent conveying of the cable 140. When the moving block 240 moves, the arc-shaped clamp 2930 and the abutment block 2931 contact the movable plate 2995, thereby... When the movable plate 2995 abuts against the abutting block 2931, the arc-shaped clamping plate 2930 changes from a vertical to a horizontal position. Then, through one side of the arc-shaped clamping plate 2930, it inserts into the clamping plate 350 near the first top plate 110, causing the clamping plates 350 on both sides to move laterally. Simultaneously, the fixing block 2910 abuts against the support block 340, thereby driving a set of moving shafts 310 to move. During movement, the moving shafts 310, through the inclined block 380, compress the third spring 370, disengaging it from the inclined groove 381. The continued movement of the moving shafts 310 leads to contact with the second set of moving shafts 310. The clamping plate 350 in the first set of moving shafts 310 is inserted into the clamping plate 350 in the second set of moving shafts 310, and so on, until the cable 140 passes between the two sets of arc-shaped clamping plates 2930. This facilitates the traction assembly 200 to clamp and pull the cable 140. The gears 440 and ratchet 450 drive the conveyor shaft 460 and conveyor wheel 480 to rotate synchronously, conveying the cable 140 and allowing it to pass through the clamping plates 350 on the four sets of moving shafts 310. The conveyor wheel 480 effectively prevents the cable 140 from contacting or twisting during 90-degree bending, facilitating better conveying. The traction assembly 200 enables the cable 140 to pass through multiple sets of clamping and moving assemblies 300 in the withstand voltage testing oil and connect with the tester 120, avoiding the need for operators to spend a lot of time threading and connecting the cable 140. At the same time, since withstand voltage testing oil needs to be injected into the insulation chamber 100 before the cable 140 is placed in the insulation chamber 100 for withstand voltage testing, it also avoids the need for operators to put their hands into the withstand voltage testing oil. This assembly further improves the testing efficiency of the cable 140. All parts not mentioned in this device are the same as or can be implemented using existing technology.

[0044] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A withstand voltage testing device for power cables, comprising a heat exchange chamber, characterized in that: A first top plate is fixed to one side of the top of the insulation chamber, and a second top plate is fixed to the end of the top of the insulation chamber away from the first top plate. A traction component is provided on one side of the top of the first top plate, and a clamping and moving component is slidably connected to the inner wall of the insulation chamber. A conveying component is provided at the bottom of the second top plate. The traction assembly includes a housing fixedly connected to one side of the top of the first top plate. A winding shaft is rotatably connected inside the housing. A rope is provided on the surface of the winding shaft. Both ends of the winding shaft are connected to the housing through a spring reel. A moving block is fixed to the bottom of the rope. A round shaft is rotatably connected inside the moving block. Eight sets of vertical plates are fixedly connected to the surface of the round shaft. L-shaped grooves matching the round shaft are opened on both sides of the inner wall of the insulation chamber. An arc-shaped rod is fixed to one side of the eight sets of vertical plates. An arc-shaped cylinder is slidably connected to the surface of the arc-shaped rod. A connecting pipe is provided on one side of the arc-shaped cylinder. Eight sets of fixed blocks are welded to one side of the moving block. Inside the connecting pipe, at the end away from the arc-shaped cylinder, a telescopic rod is rotatably connected via a damping shaft. An arc-shaped clamping plate is fixed to the end of the telescopic rod away from the connecting pipe. A belt is rotatably connected to one end of the surface of the round shaft. A moving rod is provided on the surface of the belt. A rotating shaft is rotatably connected to the end of the inner wall of the belt away from the round shaft. A connecting block is fixed to the bottom of the insulation chamber. A long shaft is rotatably connected inside the connecting block. A movable plate is fixedly connected to the surface of the long shaft. Torsion springs are provided at both ends of the long shaft. The movable component includes four sets of movable shafts slidably connected to both sides of the inner wall of the insulation chamber; multiple sets of sliding grooves are opened inside the movable shafts, and sliders are slidably connected in the sliding grooves. A second spring is fixed to one side of the slider, a support block is fixed to the bottom of the slider, and a clamping plate is fixed to one side of the support block. The end of the clamping plate near the first top plate has a trumpet-shaped opening, and the end of the clamping plate near the second top plate has a conical opening; square cylinders are fixed to the bottom of both sides of the four sets of movable shafts, and a third spring is provided inside the square cylinder. An inclined block is slidably connected to the bottom of the third spring and the insulation chamber has an inclined groove that matches the inclined block.

2. The withstand voltage testing device for power cables according to claim 1, characterized in that: Both the first and second roof panels have wire connectors at their bottom ends, with cables inserted inside the connectors. A detector is installed at the top of the first roof panel, with one end of the cable connected to the detector.

Images