An insulation testing device for a cable

Abstract

The application relates to a cable insulation testing device and belongs to the technical field of cable insulation testing. The cable insulation testing device comprises a moving seat, a testing host and a control screen, the testing host is fixedly installed at the top of the moving seat, and the control screen is fixedly installed at the top of the testing host; a moving detection mechanism comprises a connecting frame, a detection assembly and a shielding assembly; by arranging the adjustable moving detection mechanism on one side of the testing host, the interval between the two detection clamps can be flexibly adjusted and fixed when the detection assembly clamps the cable to adapt to different paragraphs, and the detection assembly can automatically move to the next paragraph along the cable after detection is completed, so that the insulation testing efficiency of long-distance and multi-section cables is greatly improved, and the operation risk is reduced; the shielding assembly is arranged on the outer side of the connecting frame, a shielding barrier can be formed in the testing process, external electromagnetic interference is reduced, and data stability and accuracy are improved.

Description

Technical Field

[0001] This invention relates to the field of cable insulation testing technology, and in particular to a cable insulation testing device. Background Technology

[0002] Currently, commonly used cable insulation testing devices generally consist of a testing host, a measuring unit, and several fixed testing fixtures. When in use, different positions of the cable need to be connected to the testing fixtures respectively. Then, the testing host applies a test voltage to the cable and collects parameters such as leakage current and partial discharge to evaluate the cable insulation performance.

[0003] In practical applications, existing insulation testing equipment faces challenges due to the varying lengths and structures of different cables, resulting in diverse requirements for testing sections. Each time the testing fixture is installed, the testing sections often need to be remeasured and re-laid out, impacting both testing efficiency and operational complexity. Furthermore, after completing one section of testing, the testing fixture must be disassembled and moved to the next section for reinstallation, a cumbersome and inconvenient process that fails to meet the high-efficiency testing needs of long-distance, multi-segment cables. Summary of the Invention

[0004] Therefore, it is necessary to provide a cable insulation testing device to address the problems of existing insulation testing devices in field applications, which require repeated measurement and deployment of test sections due to differences in cable length and structure, and the need to disassemble and move the test fixture after each section is tested. This is cumbersome, inefficient, and fails to meet the high-efficiency testing requirements of long-distance, multi-segment cables.

[0005] An insulation testing device for cables includes a movable base, a testing host, and a control panel. The testing host is fixedly installed on the top of the movable base, and the control panel is fixedly installed on the top of the testing host. A mobile testing mechanism, comprising a connecting frame, a testing component, and a shielding component, wherein the connecting frame is fixedly installed on one side of the testing host, the testing component is disposed on one side of the connecting frame, and a shielding component is disposed on the outer side of the connecting frame; The detection assembly includes a fixed tube, two support frames, and multiple detection clips. The fixed tube is fixedly installed on the other side of the connecting frame, and the two support frames are slidably connected to both ends of the fixed tube. Two detection clips are provided at the bottom of each of the two support frames.

[0006] In one embodiment, the detection component includes an electric slide rail fixedly mounted on a support frame. The electric slide rail has two output ends, and two detection clips are fixedly connected to the two output ends of the electric slide rail, respectively. The two adjacent detection clips are both configured as arc shapes.

[0007] In one embodiment, each of the two electric slide rails is provided with an electric wheel on one side away from each other. The top of the electric wheel is provided with a fixing plate, which is fixedly connected to the adjacent electric slide rail. A guide tube is fixedly installed on the surface of the fixing plate, and one side of the electric wheel is slidably connected to the guide tube.

[0008] In one embodiment, a support rod is fixedly mounted on the top of the electric wheel, and the other end of the support rod extends into the interior of the guide tube and is slidably connected inside the guide tube.

[0009] In one embodiment, a spring is fixedly installed at one end of the support rod inside the guide tube, and the other end of the spring is fixedly connected to the inner wall of the guide tube.

[0010] In one embodiment, a mounting bracket is fixedly installed on each of the two adjacent sides of the electric slide rails, and a support plate is fixedly installed on both sides of the two mounting brackets, with the two support plates on the same side arranged in a figure-eight shape.

[0011] In one embodiment, a plurality of balls are rotatably mounted on the adjacent side of the two trays, and contact pads are fixedly mounted on the adjacent side of the two detection clips on the same side.

[0012] In one embodiment, a connecting pipe is fixedly installed on the surface of the fixed pipe, and an air pump is fixedly installed on the surface of the connecting pipe. The connecting pipe is connected to the interior of the fixed pipe. Piston plates are fixedly installed on one side of the two support frames located inside the fixed pipe, and the piston plates are slidably connected to the inner wall of the fixed pipe.

[0013] In one embodiment, the shielding assembly includes an extension rod fixedly installed on the outside of the test host, with a first shielding cloth fixedly installed on both sides of the extension rod. The surface of the extension rod has multiple winding openings, all of which are located on the top of the first shielding cloth. A magnetic block is fixedly installed at the other end of the extension rod.

[0014] In one embodiment, a soft rope is rotatably mounted on one side of each of the two first shielding fabrics, and a second shielding fabric is fixedly mounted on the outer side of each of the two soft ropes.

[0015] Beneficial effects The aforementioned cable insulation testing device, by setting an adjustable moving detection mechanism on one side of the testing host, allows the detection component to flexibly adjust and fix the distance between the two detection clamps to adapt to different sections when clamping the cable. After the test is completed, it can automatically move along the cable to the next section without disassembly and reassembly, which greatly improves the insulation testing efficiency of long-distance, multi-segment cables and reduces operational risks. The shielding component is set on the outside of the connecting frame, which can form a shielding barrier during the test, reduce external electromagnetic interference, and improve data stability and accuracy.

[0016] After the test is completed, the test clamp does not need to be disassembled. The electric wheel drives the support rod to move smoothly under the sliding guidance of the guide tube, so that the test component can automatically move along the cable to the next test section and re-clamp. The spring between the support rod and the guide tube provides continuous elastic support and return force during the movement, which plays a role in buffering, vibration absorption and automatic reset. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the mobile detection mechanism of the present invention; Figure 3 This is a schematic diagram of the fixed tube and support frame structure of the present invention; Figure 4 This is a schematic diagram of the support frame and electric slide rail structure of the present invention; Figure 5 This is a schematic diagram of the fixed plate and electric wheel structure of the present invention; Figure 6 This is a schematic diagram of the bracket structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the fixed tube of the present invention; Figure 8 This is a schematic diagram of the fixed tube and air pump structure of the present invention; Figure 9 This is a schematic diagram of the extension rod and the first shielding cloth structure of the present invention; Figure 10 This is a schematic diagram of the second shielding cloth structure of the present invention.

[0019] Figure label: 100. Movable base; 200. Test host; 210. Control panel; 300. Movable detection mechanism; 310. Connecting frame; 320. Detection component; 321. Fixing tube; 322. Support frame; 323. Electric slide rail; 324. Detection clamp; 325. Contact pad; 326. Electric wheel; 327. Fixing plate; 328. Guide tube; 329. Support rod; 3210. Spring; 3211. Fixing frame; 3212. Support plate; 3213. Ball bearing; 3214. Piston plate; 3215. Connecting tube; 3216. Air pump; 330. Shielding component; 331. Extension roller; 332. Rewinding end; 333. First shielding cloth; 334. Magnetic block; 335. Soft rope; 336. Second shielding cloth. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0025] The following is combined with Figures 1-10 The present invention describes an insulation testing apparatus for cables.

[0026] In one embodiment, an insulation testing device for a cable includes a movable base 100, a testing host 200, and a control panel 210. The testing host 200 is fixedly installed on the top of the movable base 100, and the control panel 210 is fixedly installed on the top of the testing host 200. The mobile testing mechanism 300 includes a connecting frame 310, a testing component 320, and a shielding component 330. The connecting frame 310 is fixedly installed on one side of the test host 200, the testing component 320 is disposed on one side of the connecting frame 310, and the shielding component 330 is disposed on the outside of the connecting frame 310. The detection component 320 includes a fixed tube 321, two support frames 322 and multiple detection clips 324. The fixed tube 321 is fixedly installed on the other side of the connecting frame 310. The two support frames 322 are slidably connected to both ends of the fixed tube 321. Two detection clips 324 are provided at the bottom of each of the two support frames 322.

[0027] In this embodiment, by setting an adjustable movable detection mechanism 300 on one side of the test host 200, the detection component 320 can freely adjust and fix the distance between the two detection clamps 324 on both sides according to the different lengths and structures of the cable when clamping the cable. This adapts to the needs of different detection sections, avoiding the problem of having to remeasure and set up the detection sections for each test in the prior art, and greatly improving the detection flexibility and applicability. At the same time, after completing a test section, the detection component 320 can drive the two detection clamps 324 to automatically move along the cable to the next test section without manual disassembly and reinstallation. This significantly improves the insulation testing efficiency of long-distance, multi-segment cables and reduces the risk of operators coming into contact with the high-voltage end. The shielding component 330 is arranged on the outside of the connecting frame 310 and can form an effective shielding barrier during the test, reducing the influence of external electromagnetic interference on the detection signal and improving the stability and accuracy of the detection data. It should be noted that existing high-voltage cable insulation testing devices typically include a high-voltage generating unit, a measuring unit, a display and recording unit, and several fixed test clips 324, etc. The test host 200 serves as the core module, containing a high-voltage generating unit that generates the test voltage, a measuring unit for collecting and processing insulation parameters, and a display and recording unit for displaying and recording test data. The three components form a complete testing circuit through internal electrical connections and work in conjunction with the external mobile testing mechanism 300 to achieve comprehensive testing of cable insulation performance. The detection component 320 adjusts and moves the detection clamp 324 through structural sliding, without participating in the high voltage output itself; the shielding component 330 is arranged outside the connecting frame 310, forming only a physical shielding barrier to weaken external electromagnetic interference, with no conduction or load on the electrical test circuit, and will not affect the test voltage and measurement accuracy.

[0028] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the detection component 320 includes an electric slide rail 323 fixedly mounted on a support frame 322. The electric slide rail 323 has two output ends, and two detection clips 324 are fixedly connected to the two output ends of the electric slide rail 323 respectively. The two adjacent detection clips 324 are both set in an arc shape.

[0029] In this embodiment, two detection clamps 324 are fixedly connected to the two output ends of the electric slide rail 323, so that the two detection clamps 324 can achieve synchronous and smooth opening and closing and position adjustment under the drive of the slide rail. This facilitates the rapid change of clamping distance according to different cable diameters and testing section requirements. The two adjacent detection clamps 324 are both set to an arc shape, which can fit more closely to the outer surface of the cable, increase the contact area, and ensure that the clamping is stable and does not damage the cable insulation layer during the test.

[0030] Electric wheels 326 are provided on the opposite sides of the two electric slide rails 323. A fixing plate 327 is provided on the top of the electric wheel 326. The fixing plate 327 is fixedly connected to the adjacent electric slide rail 323. A guide tube 328 is fixedly installed on the surface of the fixing plate 327. One side of the electric wheel 326 is slidably connected to the guide tube 328.

[0031] In this embodiment, during use, the detection component 320 can be moved smoothly and accurately to the next detection section by being driven by the electric wheel 326 and in conjunction with the sliding guidance of the guide tube 328, thereby improving the detection efficiency.

[0032] A support rod 329 is fixedly installed on the top of the electric wheel 326, and the other end of the support rod 329 extends into the guide tube 328 and is slidably connected inside the guide tube 328.

[0033] In this embodiment, the electric wheel 326 drives the support rod 329 to slide smoothly along the guide tube 328, so that the electric wheel 326 can automatically adjust its position according to the cable diameter and height, thereby achieving adaptive support and guidance for cables of different specifications.

[0034] A spring 3210 is fixedly installed at one end of the support rod 329 inside the guide tube 328, and the other end of the spring 3210 is fixedly connected to the inner wall of the guide tube 328.

[0035] In this embodiment, when the support rod 329 slides inside the guide tube 328, the spring 3210 can provide continuous elastic support and return force to the support rod 329, and play a role in buffering, vibration absorption and automatic reset during the process of the detection component 320 moving along the cable to the next detection section.

[0036] Two electric slide rails 323 are each fixedly mounted on one side of an adjacent side with a mounting bracket 3211. Each of the two mounting brackets 3211 is fixedly mounted on both sides with a support plate 3212. The two support plates 3212 located on the same side are arranged in a figure-eight shape.

[0037] In this embodiment, the two support plates 3212 can form auxiliary contact with the outside of the cable when the two detection clamps 324 are temporarily separated from the cable or their position is adjusted, which provides support and guidance for the detection component 320 and prevents the electric wheel 326 from tipping over or deviating due to loss of support during movement.

[0038] Multiple ball bearings 3213 are rotatably mounted on the adjacent side of the two pallets 3212, and contact pads 325 are fixedly mounted on the adjacent side of the two detection clamps 324 on the same side.

[0039] In this embodiment, the ball bearing 3213 provides low-friction rolling support when the detection component 320 moves along the cable, making the contact between the tray 3212 and the cable smoother and reducing wobbling or displacement caused by sliding resistance. The contact pad 325 plays a flexible buffering and protective role when the detection clamp 324 contacts the cable, ensuring stable clamping and avoiding damage to the cable insulation layer.

[0040] A connecting pipe 3215 is fixedly installed on the surface of the fixed pipe 321, and an air pump 3216 is fixedly installed on the surface of the connecting pipe 3215. The connecting pipe 3215 is connected to the interior of the fixed pipe 321. Piston plates 3214 are fixedly installed on one side of the two support frames 322 located inside the fixed pipe 321. The piston plates 3214 are slidably connected to the inner wall of the fixed pipe 321.

[0041] In this embodiment, when it is necessary to adjust the distance between the two detection clamps 324 on both sides, air can be pumped into or deflated into the connecting pipe 3215 by the air pump 3216 to drive the two piston plates 3214 to move synchronously, thereby achieving a smooth adjustment of the distance between the detection clamps 324. This can quickly adapt to cables of different specifications and segmentation requirements, reduce adjustment steps, and improve the ease of operation.

[0042] like Figure 2 , Figure 9 and Figure 10 As shown, the shielding assembly 330 includes an extension rod 331 fixedly installed on the outside of the test host 200. A first shielding cloth 333 is fixedly installed on both sides of the extension rod 331. Multiple winding openings 332 are opened on the surface of the extension rod 331. The multiple winding openings 332 are all located on the top of the first shielding cloth 333. A magnetic block 334 is fixedly installed at the other end of the extension rod 331.

[0043] In this embodiment, the extension roller 331 is wound up through the winding opening 332 on one side, which can simultaneously and neatly roll up and store the first shielding cloth 333 on both sides. The operation is simple and does not take up much space. After the winding is completed, the magnetic block 334 can be magnetically attracted and fixed to the outside of the test host 200. Since there is no winding opening 332 on the other side of the extension roller 331, it will be in a vertical state when the shielding cloth is unfolded and will not fall down on its own. It can stably form an effective shielding barrier for the test host 200 and its connection port, reducing the influence of external electromagnetic interference on the detection signal.

[0044] A soft rope 335 is rotatably installed on one side of each of the two first shielding cloths 333, and a second shielding cloth 336 is fixedly installed on the outer side of each of the two soft ropes 335.

[0045] In this embodiment, the two second shielding cloths 336 can be alternately stacked on top of the two first shielding cloths 333 when not unfolded, which facilitates storage and transportation. After the first shielding cloths 333 are unfolded, the second shielding cloths 336 on both sides can be rotated by the soft rope 335, so that they rotate from the top to below the first shielding cloths 333 and are located on both sides of the connecting frame 310, thereby forming a larger shielding space between the test host 200 and the mobile detection mechanism 300, enhancing the anti-interference effect and providing additional safety isolation for the operating area.

[0046] Working principle: First, move the test host 200 along with the movable base 100 to the cable under test, place the movable base 100 stably, and perform a power-on self-test on the test host 200 through the control panel 210. Then, unfold the shielding component 330 set on the outside of the connecting frame 310, pull out the first shielding cloth 333 along the extension rod 331, and attach the magnet 334 to the outside of the test host 200 for fixation. At the same time, rotate the second shielding cloth 336 from the top of the first shielding cloth 333 to the bottom through the soft rope 335, so that it is located on the connecting frame 310. On both sides, a shielded space is formed covering the connection port between the test host 200 and the mobile testing mechanism 300, reducing external electromagnetic interference. Then, the operator clamps the two testing clips 324 of the testing component 320 onto the outside of the section of cable to be tested. The control panel 210 inflates or deflates the air pump 3216, driving the two piston plates 3214 inside the fixed tube 321 to slide synchronously, thereby automatically adjusting the spacing of the support frame 322 so that the clamping position of the two testing clips 324 matches the cable diameter and the requirements of the testing section. Driven by the electric slide rail 323, the testing clips 324 can achieve synchronous and smooth opening and closing. The arc-shaped clamping jaws fit snugly against the cable surface, increasing the contact area and ensuring stable clamping without damaging the insulation layer during testing. After the test begins, the control panel 210 activates the high-voltage generating unit inside the test host 200 to apply a test voltage to the cable under test. The measuring unit collects parameters such as leakage current and partial discharge in real time and displays and records them on the control panel 210. After the test is completed, the operator does not need to disassemble the test clamp 324. The electric wheel 326 drives the support rod 329 to move smoothly under the sliding guidance of the guide tube 328, so that the test component 320 automatically moves along the cable to the next test section and re-clamps. The spring 3210 between the support rod 329 and the guide tube 328 provides continuous elastic support and return force during the movement, playing a role in buffering, vibration absorption and automatic reset. The support plates 3212 on both sides of the fixed frame 3211 are arranged in a figure-eight shape and equipped with ball bearings 3213. When the detection clamp 324 is temporarily separated or its position is adjusted, it forms auxiliary contact with the outside of the cable to prevent the electric wheel 326 from tipping over or shifting when it moves. The contact pad 325 on the adjacent side of the detection clamp 324 provides flexible buffer and protection for the cable. After each section is tested in sequence, the control panel 210 automatically collects the insulation parameters of each section and generates a test report. The operator simultaneously retracts the first shielding cloth 333 on both sides through the rewinding opening 332 of the extension roller 331. The magnetic block 334 attracts and fixes the extension roller 331. The second shielding cloth 336 is stacked on top for storage. Finally, the moving base 100 and the entire device are moved away from the site.

[0047] It should be noted that the test host, control panel, detection clamp, electric wheel, electric slide rail and air pump mentioned above are all devices with relatively mature existing technology. The specific model can be selected according to the actual needs. At the same time, the test host, control panel, detection clamp, electric wheel, electric slide rail and air pump can be powered by the built-in power supply or by the mains power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An insulation testing device for cables, comprising a movable base (100), a testing host (200), and a control panel (210), characterized in that, The test host (200) is fixedly installed on the top of the mobile base (100), and the control screen (210) is fixedly installed on the top of the test host (200); A mobile testing mechanism (300) includes a connecting frame (310), a testing component (320), and a shielding component (330). The connecting frame (310) is fixedly installed on one side of the test host (200), the testing component (320) is disposed on one side of the connecting frame (310), and the shielding component (330) is disposed on the outside of the connecting frame (310). The detection component (320) includes a fixed tube (321), two support frames (322) and multiple detection clips (324). The fixed tube (321) is fixedly installed on the other side of the connecting frame (310). The two support frames (322) are slidably connected to both ends of the fixed tube (321). Two detection clips (324) are provided at the bottom of each of the two support frames (322).

2. The cable insulation testing device according to claim 1, characterized in that, The detection component (320) includes an electric slide rail (323) fixedly installed on the support frame (322). The electric slide rail (323) has two output ends, and two detection clips (324) are fixedly connected to the two output ends of the electric slide rail (323), respectively. The two adjacent detection clips (324) are both set to an arc shape.

3. The cable insulation testing device according to claim 2, characterized in that, Electric wheels (326) are provided on the opposite sides of the two electric slide rails (323). A fixing plate (327) is provided on the top of the electric wheel (326). The fixing plate (327) is fixedly connected to the adjacent electric slide rail (323). A guide tube (328) is fixedly installed on the surface of the fixing plate (327). One side of the electric wheel (326) is slidably connected to the guide tube (328).

4. The cable insulation testing device according to claim 3, characterized in that, A support rod (329) is fixedly installed on the top of the electric wheel (326), and the other end of the support rod (329) extends into the guide tube (328) and is slidably connected inside the guide tube (328).

5. The cable insulation testing device according to claim 4, characterized in that, A spring (3210) is fixedly installed at one end of the support rod (329) inside the guide tube (328), and the other end of the spring (3210) is fixedly connected to the inner wall of the guide tube (328).

6. The cable insulation testing device according to claim 3, characterized in that, Each of the two electric slide rails (323) has a fixed bracket (3211) fixedly installed on one side of each adjacent side. Each of the two fixed brackets (3211) has a support plate (3212) fixedly installed on both sides of each other. The two support plates (3212) located on the same side are arranged in a figure-eight shape.

7. The cable insulation testing device according to claim 6, characterized in that, Multiple balls (3213) are rotatably mounted on the adjacent side of the two trays (3212), and contact pads (325) are fixedly mounted on the adjacent side of the two detection clips (324) on the same side.

8. The cable insulation testing device according to claim 1, characterized in that, A connecting pipe (3215) is fixedly installed on the surface of the fixed pipe (321), and an air pump (3216) is fixedly installed on the surface of the connecting pipe (3215). The connecting pipe (3215) is connected to the interior of the fixed pipe (321). Piston plates (3214) are fixedly installed on one side of the two support frames (322) located inside the fixed pipe (321). The piston plates (3214) are slidably connected to the inner wall of the fixed pipe (321).

9. The cable insulation testing device according to claim 1, characterized in that, The shielding assembly (330) includes an extension rod (331) fixedly installed on the outside of the test host (200). A first shielding cloth (333) is fixedly installed on both sides of the extension rod (331). Multiple winding openings (332) are opened on the surface of the extension rod (331). The multiple winding openings (332) are all located on the top of the first shielding cloth (333). A magnetic block (334) is fixedly installed at the other end of the extension rod (331).

10. The cable insulation testing device according to claim 9, characterized in that, A soft rope (335) is rotatably installed on one side of each of the two first shielding cloths (333), and a second shielding cloth (336) is fixedly installed on the outer side of each of the two soft ropes (335).

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