A wind turbine generator system cable detection device

Abstract

The utility model relates to the field of wind driven generator cable detection discloses a kind of wind driven generator unit cable detection device, including the clamping shell clamped on cable, clamping shell includes two outer shell, and the inner shell piece is slidably inserted in two outer shell, several detection inserts are uniformly inserted on the inner shell piece, and the side end of inner shell piece is equipped with the adjusting mechanism of driving detection insert to move to cable, the beneficial effects compared with prior art of the utility model are as follows: adjusting mechanism adopts the annular transmission structure of arc plate cooperation whole cone gear disc, rotates arc plate to make it rotate along the circumferential rotation of outer shell inner circle sliding rail, and all bevel gears are driven to rotate by cone gear disc, to further drive all detection probe to feed synchronously, all probe feed quantity is completely consistent, only need to rotate once adjusting ring can complete the penetration and back operation of all probe, greatly improve detection operation speed, effectively shorten high-altitude stay time, adapt to the efficient operation demand of narrow space in tower drum.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine cable testing, specifically to a wind turbine cable testing device. Background Technology

[0002] The power cables and control cables of wind turbine generators are the core carriers for power transmission and signal control within the tower. They are susceptible to faults such as core wire breakage and increased contact resistance due to long-term exposure to factors such as nacelle yaw and torsion, tower vibration, and diurnal temperature variations. They are key targets for wind farm operation and maintenance inspections.

[0003] Since testing operations are mostly carried out in the confined space at high altitudes inside the tower, the ease of operation and contact reliability of the testing equipment directly determines the efficiency and safety of maintenance. However, existing cable testing tools generally suffer from defects such as unreliable electrical contact, poor compatibility with different cable specifications, and cumbersome high-altitude operations, making it difficult to efficiently complete continuity testing, insulation testing, and fault location of wind turbine cables.

[0004] Currently, the most commonly used surface-clamping testing tools in wind farm operation and maintenance are alligator clips and clamp-type testing probes. During testing, the insulation layer at the cable end needs to be stripped, and the clamp is held on the exposed core wire to form electrical contact. These tools can be used for testing both ends of the entire cable, but they have significant limitations when troubleshooting section by section inside the tower: testing long-distance cables in sections requires repeatedly stripping the insulation layer, which is labor-intensive and easily damages the core wire, making subsequent insulation repair difficult; if only clamped on the surface of the outer sheath or shielding layer, the contact resistance fluctuates greatly, and the test data of insulation resistance and conduction resistance have high errors, which can easily lead to misjudgment and missed detection. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned difficulties and provide a wind turbine generator cable testing device.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: A wind turbine generator cable testing device includes a clamping housing that is circular in shape and clamps onto the cable. The clamping housing includes two semi-circular outer shells, and an inner shell is slidably inserted into each of the two outer shells. A plurality of testing plugs are evenly inserted into the inner shells. Each testing plug includes a testing probe. The end of the testing probe near the cable is pointed. The tip of the testing probe penetrates the insulation layer of the cable and abuts against the core wire. An adjustment mechanism is provided at the side of the inner shell to drive the testing plug to move toward the cable.

[0007] As an improvement, a slot is provided at the inner ring of the outer shell, with an open end and a closed end respectively. The inner shell includes an inner shell, and an outer plate that is inserted into the slot is provided at the outer ring of the inner shell. A cover plate fixed by bolts is provided at the slot opening on the outer shell, and the cover plate abuts against the end of the outer plate.

[0008] As an improvement, a front end plate is provided at one end of the outer shell. The front end plate and the outer shell are provided with a mounting through groove. The outer plate of the inner shell is provided with a slide block through which the detection plug slides. The slide block and the mounting through groove slide against each other.

[0009] As an improvement, the inner shell is equipped with a bevel gear that corresponds to the position of the slide. The bevel gear is driven to rotate by an adjustment mechanism. The inner ring of the inner shell is provided with an inner layer plate. The detection plug includes an outer screw cylinder that penetrates the slide, the bevel gear and the inner layer plate. The outer screw cylinder is threadedly inserted into the bevel gear. The inner layer plate is provided with a limiting cylinder. The side end of the outer screw cylinder is provided with a limiting groove that slides in cooperation with the limiting cylinder.

[0010] As an improvement, the detection plug also includes an inner screw that is threaded into the outer screw. The detection probe is fixedly inserted through the inner screw and the tip of the detection probe extends from the end of the outer screw near the cable. The ends of the outer screw and the inner screw are respectively provided with adjustment head one and adjustment head two.

[0011] As an improvement, the inner ring of the outer shell is provided with a slide rail located on one side of the mounting slot. The adjustment mechanism includes an arc plate. The arc plate rotates relative to the inner shell by cooperating with the slide rail through a slide groove. A connecting groove is provided on the end face of the inner shell near the arc plate. Two arc plates are joined together to form a ring and the connecting grooves on the two inner shells are connected. A bevel gear disk is provided on the end face of the arc plate that passes through the connecting groove and meshes with a bevel gear.

[0012] As an improvement, a rear end plate is provided at the other end of the outer shell, the rear end plates of the two outer shells are hinged together, and the two front end plates are fixedly connected by bolts.

[0013] The advantages of this utility model compared with the prior art are as follows: 1. The adjustment mechanism adopts an annular transmission structure with an arc plate and a full-circumference bevel gear disc. Rotating the arc plate causes it to rotate circumferentially along the inner ring slide rail of the outer shell. The bevel gear disc synchronously drives all the bevel gears evenly arranged circumferentially to rotate at the same time. Then, through the threaded transmission, all the detection probes are driven to feed radially inward synchronously. Multiple circumferential probes penetrate the cable evenly from multiple directions and are clamped and centered synchronously by the outer screw cylinder. The feed amount of all probes is completely consistent. Only one rotation of the adjustment ring is needed to complete the insertion and retraction of all probes, which greatly improves the detection operation speed, effectively shortens the high-altitude dwell time, and adapts to the high-efficiency operation requirements of the narrow space inside the tower.

[0014] 2. The detection plug adopts a radial feed structure with a detection probe, an external screw, and a bevel gear. The bevel gear is driven to rotate by the adjustment mechanism, and drives the external screw to feed radially in a straight line through the thread transmission. The tip of the detection probe simultaneously pierces the cable insulation layer and directly contacts the internal metal core wire, forming a stable and reliable metal-to-metal electrical contact. This completely eliminates the defect of large contact resistance fluctuations in surface clamping tools, significantly improving the accuracy of detection data such as continuity resistance and insulation resistance. It reduces misjudgments and omissions from the root cause, ensuring the accuracy of fault location.

[0015] 3. The testing plug adopts a double-layer screw barrel fine-tuning structure with an outer screw barrel and an inner screw barrel nested together. The outer screw barrel is driven by a bevel gear to achieve overall coarse feed, and the inner screw barrel is threaded into the outer screw barrel. The testing probe is fixedly inserted into the center of the inner screw barrel. The extension length of the testing probe tip can be finely adjusted by rotating the adjustment head at the end of the inner screw barrel through the thread engagement. The extension amount can be flexibly adjusted for cables with different insulation layer thicknesses. The extension amount is increased for medium-voltage power cables with thicker insulation layers and decreased for low-voltage control cables with thinner insulation layers, ensuring that the probe tip just touches the core wire without excessively penetrating and damaging the core wire. It covers the full specification testing needs from low-voltage control cables to medium-voltage power cables.

[0016] 4. The inner shell is inserted and inserted into the outer shell through the slot. The inner shell can be removed and replaced as a whole by removing the end cover. It can quickly replace inner shell components that are compatible with different wire diameters. The overall structure is compact and lightweight. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembly structure of a wind turbine generator cable testing device according to the present invention.

[0018] Figure 2 This is a schematic diagram of the detection device structure of a wind turbine generator cable detection device according to this utility model.

[0019] Figure 3 This is a schematic diagram of the disassembled structure of a wind turbine generator cable testing device according to the present invention.

[0020] Figure 4 This is a cross-sectional structural diagram of a wind turbine generator cable testing device according to the present invention.

[0021] Figure 5 This is a schematic diagram of the clamping housing structure of a wind turbine generator cable testing device according to this utility model.

[0022] Figure 6 This is a partial structural schematic diagram of a wind turbine generator cable testing device according to the present invention.

[0023] Figure 7This is a schematic diagram of the detection plug structure of a wind turbine generator cable detection device according to this utility model.

[0024] As shown in the figure: 1. Clamping shell; 101. Outer shell; 102. Slot; 103. Cover plate; 104. Rear end plate; 105. Front end plate; 106. Mounting through slot; 107. Slide rail; 2. Inner shell; 201. Inner shell; 202. Outer insert plate; 203. Connecting slot; 204. Slide block; 205. Inner layer plate; 206. Limiting cylinder; 207. Bevel gear; 3. Detection plug; 301. Outer screw cylinder; 302. Limiting slot; 303. Adjusting head one; 304. Inner screw cylinder; 305. Adjusting head two; 306. Detection probe; 4. Adjustment mechanism; 401. Arc plate; 402. Slide groove; 403. Bevel gear disc. Detailed Implementation

[0025] This wind turbine cable inspection device addresses the pain points of high-altitude cable inspection within wind farm towers, including the difficulty of inspection, poor compatibility with different cable specifications, and the cumbersome disassembly and assembly of traditional inspection equipment. It employs a probe-type direct inspection structure, where the 306 probe tip penetrates the cable insulation layer to directly contact the core wire, enabling precise electrical contact testing for continuity, insulation resistance, and other parameters, avoiding errors caused by poor surface contact. A double-layer screw barrel micro-adjustment structure allows adjustment of the probe extension length via the threaded engagement of the inner and outer barrels, accommodating cables with varying insulation thicknesses and covering the inspection needs of multiple specifications, from low-voltage control cables to medium-voltage power cables. The fully detachable structure features a hinged clamping mechanism and a removable inner shell. The two halves of the outer shell open and close, while the inner shell can be completely removed and replaced. The device is easy to assemble, disassemble, and carry, perfectly suited for the confined spaces within wind farm towers.

[0026] The entire device is arranged in a circular ring and clamped on the outer wall of the cable. The side adjustment mechanism 4 drives multiple sets of circumferential detection probes 306 to feed synchronously and evenly penetrate the insulation layer to contact the core wire. The detection stability and accuracy are far superior to surface clamping detection equipment. It can be widely used in operation and maintenance scenarios such as continuity testing, insulation testing, and fault location of power cables and control cables of wind turbine generators.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 As shown: The clamping housing 1 is the external load-bearing and quick-clamping structure of the entire device, including two semi-circular outer housings 101, a slot 102 opened in the inner ring of the outer housing 101, with the two ends of the slot 102 being open and closed respectively, a cover plate 103 fixed to the open end of the slot 102 by bolts, a rear end plate 104 set at one end of the outer housing 101, a front end plate 105 set at the other end of the outer housing 101, an installation through groove 106 opened on both the front end plate 105 and the outer housing 101, and a slide rail 107 set on one side of the installation through groove 106 in the inner ring of the outer housing 101; the rear end plates 104 of the two outer housings 101 are hinged to each other, and the two front end plates 105 can be locked and fixed by bolts. After being assembled, the whole unit forms a complete circular clamping housing 1. The overall structure is compact and lightweight, which is convenient for maintenance personnel to carry and climb the tower, and is suitable for high-altitude narrow working spaces.

[0029] Two semi-circular outer shells 101 are connected by a hinge shaft at the rear end plate 104 and can be opened and closed freely around the hinge shaft. During the inspection operation, first loosen the fixing bolts at the front end plate 105, open the two outer shells 101 and snap them onto the outer wall of the cable to be tested, align them and close the two outer shells 101, and tighten the connecting bolts at the front end plate 105 to quickly fix the entire device on the cable. It does not need to be inserted from the end of the cable and can be directly installed at any section of the cable, which is suitable for segmented testing of long-distance cables. The slot 102 of the inner ring of the outer shell 101 is opened around the axis. One end is a closed structure to provide axial limit, and the other end is an open structure for the inner shell 2 to be inserted. The cover plate 103 at the open end is fixed to the end of the outer shell 101 by bolts. After the inner shell 2 is inserted into the slot 102 from the open end, the cover plate 103 is installed and the bolts are tightened to block the end of the inner shell 2 and prevent the inner shell 2 from falling out. When it is necessary to disassemble for maintenance or replace the inner shell 2 of different specifications, the cover plate 103 can be removed to pull the inner shell 2 out of the slot 102 as a whole. It is easy to disassemble and assemble, adaptable to cables of different diameters, and the equipment has strong reusability. The mounting slot 106, which is shared by the front plate 105 and the outer shell 101, provides space for the installation and movement of the detection plug 3. The outer end of the detection plug 3 extends out of the slot for easy operation. The inner ring slide rail 107 provides circumferential rotation guide support for the adjustment mechanism 4, ensuring that the adjustment mechanism 4 always remains coaxial with the inner shell 2 when it rotates.

[0030] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 6 Appendix Figure 7 As shown: The inner shell 2 serves as the internal support for the detection plug-in 3 and the adjustment mechanism 4. It includes a semi-circular inner shell 201, an outer insert plate 202 on the outer ring of the inner shell 201 that can be inserted into the slot 102, a connecting groove 203 on the end face of the inner shell 201 near the adjustment mechanism 4, a slide block 204 fixedly mounted on the outer insert plate 202 for the detection plug-in 3 to slide through, an inner layer plate 205 on the inner ring of the inner shell 201, a limiting cylinder 206 on the inner layer plate 205 corresponding to the position of each detection plug-in 3, and a bevel gear 207 rotatably mounted inside the inner shell 201 that corresponds to the position of the slide block 204. The two inner shells 2 are assembled to form a complete ring structure. The outer insert plate 202 and the slot 102 of the outer shell 101 are in concave-convex fit, and the slide block 204 can slide and abut along the mounting groove 106.

[0031] The inner shell 201 has a semi-circular arc shell structure. The outer insert plate 202 of the outer ring protrudes axially. After being inserted from the open end of the slot 102 of the outer shell 101, it forms a concave-convex fit with the slot 102 and can slide into place along the axial direction of the slot 102. The wall of the slot 102 at the closed end blocks one end of the outer insert plate 202 to limit its position. After the cover plate 103 is installed on the other end, the axial position of the inner shell 2 can be completely fixed, realizing a reliable connection between the inner shell 2 and the outer shell 101. When it needs to be replaced, the cover plate 103 can be removed and the whole thing can be pulled out. Inside the inner housing 201, a bevel gear 207 is rotatably installed at the position of each detection plug 3. The bevel gear 207 has an internal threaded hole in the center, through which the detection plug 3 passes. The slide 204 on the outer insert plate 202 provides radial sliding support and guidance for the detection plug 3. The limiting sleeve 206 on the inner ring inner layer plate 205 is sleeved on the outer side of the end of the outer screw cylinder 301 and cooperates with the limiting groove 302 on the outer screw cylinder 301 to restrict the circumferential rotation of the outer screw cylinder 301. When the bevel gear 207 rotates, the outer screw cylinder 301 can only make linear feed motion in the radial direction and will not rotate synchronously with the bevel gear 207. The connecting groove 203 on the side end face of the inner shell 201 is an arc-shaped through groove. The adjusting mechanism 4 extends into the inner shell 201 from the connecting groove 203 and meshes with the conical teeth of all bevel gears 207, converting the circumferential rotational power into the rotation of each bevel gear 207, driving all detection plugs 3 to move radially synchronously. The two inner shell parts 2 open and close synchronously with the outer shell 101, and after being assembled, they form a complete ring-shaped bearing structure. Multiple sets of detection plugs 3 arranged evenly in the circumference can penetrate the cable from multiple directions to ensure the reliability of the detection contact.

[0032] Combined with appendix Figure 1 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 As shown: The detection plug-in 3 is the core execution component for cable detection, including an outer screw cylinder 301 that is threaded into the bevel gear 207, a limiting groove 302 that slides with the limiting cylinder 206 at the side end of the outer screw cylinder 301, an adjustment head 303 at the outer end of the outer screw cylinder 301, an inner screw cylinder 304 that is threaded into the outer screw cylinder 301, an adjustment head 305 at the outer end of the inner screw cylinder 304, and a detection probe 306 that is fixedly inserted through the inner screw cylinder 304. The end of the detection probe 306 near the cable is pointed, and the pointed end can penetrate the cable insulation layer and abut against the core wire. The tail end of the detection probe 306 extends out of the outer end of the inner screw cylinder 304 for connecting the detection instrument line.

[0033] The outer screw cylinder 301 is a hollow cylinder with external threads. It passes through the threaded hole in the center of the bevel gear 207. The outer limiting groove 302 is engaged with the limiting cylinder 206 on the inner layer plate 205 to restrict its circumferential rotation. When the bevel gear 207 is driven to rotate by the adjusting mechanism 4, the outer screw cylinder 301 is driven to feed radially in a straight line through the threaded engagement, realizing the overall coarse feed of the detection probe 306 and pushing the probe tip to penetrate the cable insulation layer. The inner screw cylinder 304 is threadedly installed in the internal cavity of the outer screw cylinder 301. The test probe 306 is fixedly inserted along the axis through the center of the inner screw cylinder 304, with its tip extending inward and its tail extending outward to connect to the test lead. When the adjustment head 305 at the outer end of the inner screw cylinder 304 is rotated, the extension length of the tip of the test probe 306 is first finely adjusted according to the thickness of the cable insulation layer. Through the threaded engagement, the inner screw cylinder 304 is driven to move radially within the outer screw cylinder 301 to adapt to cables with different insulation layer thicknesses. For medium-voltage cables with thicker insulation layers, the probe extension can be increased, and for low-voltage control cables with thinner insulation layers, the extension can be decreased to ensure that the probe tip just touches the core wire without excessively penetrating and damaging the core wire. The tip of the detection probe 306 is a sharp conical structure that can easily pierce the insulation layer of materials such as rubber and cross-linked polyethylene, and directly form a reliable electrical contact with the internal metal core wire. The adjustment head 305 at the outer end of the inner screw 304 can be used to manually fine-tune the feed amount for a single wire to adapt to individual deviations at different positions. Each probe can be calibrated independently to ensure that all probes can reliably contact the core wire.

[0034] After the test probe 306 is removed, the surface of the cable insulation layer around the pinhole is cleaned. The pinhole is filled with a cross-linked polyethylene repair strip of the same material as the cable insulation. The repair material is fused to the original insulation layer by heating using a hot welding process. Two layers of self-adhesive rubber insulation tape are wrapped around the outer half-overlap to restore the insulation thickness. The outermost layer is fitted with a small section of heat shrink tubing, which is heated and shrunk to reinforce the insulation and ensure that the insulation strength and waterproof sealing performance of the repaired position meet the original cable standard. If a cable core breakage fault is located by the detection probe 306, first remove and neatly peel off the outer sheath, insulation layer, and shielding layer of the faulty section layer by layer. Align the two ends of the broken copper core and cold-press them together with a tinned copper connecting sleeve to maintain conductivity. Wrap semi-conductive tape around the crimped joint to restore the inner shielding structure, then replenish the insulation layer and armor shielding layer layer by layer. Finally, cover the entire structure with a heat-shrinkable outer sheath for sealing. After the repair is completed, the device must be used again to test the conductivity and insulation resistance. The cable can only be restored to operation after all indicators are confirmed to be qualified.

[0035] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 As shown: The adjustment mechanism 4 is an operating mechanism for driving all detection probes 306 to feed synchronously. It includes a semi-circular arc plate 401, a groove 402 opened in the inner ring of the arc plate 401, and a bevel gear disk 403 provided on the end face of the arc plate 401 facing the inner housing 201. The two arc plates 401 are joined together to form a complete ring structure. The groove 402 is in concave-convex fit with the slide rail 107 of the inner ring of the outer housing 101. The arc plate 401 can rotate circumferentially relative to the inner housing 201 along the slide rail 107. The bevel gear disk 403 passes through the connecting groove 203 on the inner housing 201 and meshes with all the bevel gears 207.

[0036] Two semi-circular arc plates 401 open and close synchronously with the outer shell 101, forming a complete annular adjustment ring after being assembled. The inner ring's sliding groove 402 is locked on the inner ring's sliding rail 107 of the outer shell 101, and can rotate freely along the circumference of the sliding rail 107 without axially dislodging. A beveled toothed disc 403 is provided on the end face of the arc plate 401 facing the inner housing 201. The beveled toothed disc 403 extends into the inner housing 201 from the connecting groove 203 and meshes with the conical teeth of all the bevel gears 207 arranged in the circumferential direction. When the operator rotates the arc plate 401 to rotate it in the circumferential direction along the slide rail 107, the beveled toothed disc 403 rotates synchronously. Through the conical meshing, it drives all the bevel gears 207 to rotate simultaneously. Then, through the threaded transmission, it drives all the outer screws 301 of the detection plug 3 to feed synchronously in the radial direction to clamp and center the cable. It also realizes the synchronous insertion and retraction of multiple circumferential detection probes 306, ensuring that the feed amount of all detection probes 306 is completely consistent, and there will be no problem that some detection probes 306 penetrate too deeply and others cannot contact the core wire. After the two arc plates 401 are joined together, the bevel gear disk 403 is also joined together to form a complete circle of teeth. When rotating, it can synchronously drive all the bevel gears 207 on the two halves of the inner shell. During operation, only one side of the arc plate 401 needs to be rotated to complete the feeding operation of all the detection probes 306, which greatly improves the detection efficiency and is especially suitable for rapid operation when working at height, reducing the time spent at height.

[0037] When implementing the wind turbine generator cable testing device, before the testing operation, the adjusting head 305 is rotated one by one according to the insulation layer thickness of the cable to be tested. The initial extension of the testing probe 306 is finely adjusted by the threaded engagement of the inner screw cylinder 304 and the outer screw cylinder 301, so that the tip of the probe can just penetrate the insulation layer and abut against the core wire without damaging the core wire. During on-site testing, loosen the fixing bolts of the front plate 105, open the two outer shells 101 around the rear hinge shaft, clamp the entire device onto the outer wall of the corresponding test section of the cable to be tested inside the tower, close the two outer shells 101 and tighten the bolts of the front plate 105 so that the clamping shell 1 is fixed around the cable. Then, manually rotate the arc plate 401 to make it rotate circumferentially along the slide rail 107. The entire bevel gear disk 403 synchronously drives all bevel gears 207 to rotate. Through the threaded transmission, all external screws 301 are driven to feed radially inward synchronously. The tips of multiple detection probes 306, which are evenly distributed circumferentially, synchronously pierce the cable insulation layer and evenly contact the internal metal core wire from multiple directions to complete reliable electrical contact. By connecting the test instrument leads to the tail ends of each test probe 306, various electrical tests can be performed, such as cable continuity performance, insulation resistance, and core wire fault location.

[0038] After the test is completed, rotate the arc plate 401 in the opposite direction to drive all the test probes 306 to retract synchronously and detach from the cable core and insulation layer. Loosen the bolts of the front plate 105, open the outer shell 101, and remove the entire test device. Then, clean the dirt around the cable pinhole, fill the pinhole with cross-linked polyethylene repair strip of the same material, and after hot welding, wrap two layers of self-adhesive rubber insulation tape in half. The outer layer is then wrapped with heat shrink tubing for heating and shrinkage reinforcement, restoring the insulation strength and waterproof sealing performance at the pinhole. If a broken core fault is detected, remove the structure of each layer of the faulty section, use tinned copper sleeve to cold press the conductive core wire, and restore the semi-conductive shielding layer, insulation layer, armor layer and outer sheath layer by layer. After the repair is completed, use this device again to re-inspect and confirm that it is qualified, and the cable can be restored to normal operation.

[0039] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wind turbine generator cable testing device, comprising a clamping housing (1) that is clamped onto the cable and is generally circular, characterized in that: The clamping housing (1) includes two semi-circular outer housings (101), and an inner housing (2) is slidably inserted into each of the two outer housings (101). Several detection plugs (3) are evenly inserted into the inner housing (2). The detection plugs (3) include detection probes (306). The end of the detection probe (306) near the cable is set with a tip. The tip of the detection probe (306) penetrates the insulation layer of the cable and abuts against the core wire. An adjustment mechanism (4) is provided at the side end of the inner housing (2) to drive the detection plugs (3) to move toward the cable.

2. The wind turbine generator cable testing device according to claim 1, characterized in that: The outer shell (101) has a slot (102) at the inner ring. The two ends of the slot (102) are open and closed respectively. The inner shell (2) includes an inner shell (201). The outer ring of the inner shell (201) has an outer insert plate (202) that is inserted into the slot (102). The slot (102) opening on the outer shell (101) has a cover plate (103) fixed by bolts. The cover plate (103) abuts against the end of the outer insert plate (202).

3. The wind turbine generator cable testing device according to claim 2, characterized in that: One end of the outer shell (101) is provided with a front end plate (105), and the front end plate (105) and the outer shell (101) are provided with a mounting through groove (106). The outer insert plate (202) of the inner shell (201) is provided with a slide block (204) through which the detection plug (3) slides, and the slide block (204) slides against the mounting through groove (106).

4. The wind turbine generator cable testing device according to claim 3, characterized in that: The inner shell (201) is provided with a bevel gear (207) that corresponds to the position of the slide (204). The bevel gear (207) is driven to rotate by the adjustment mechanism (4). The inner ring of the inner shell (201) is provided with an inner layer plate (205). The detection plug (3) includes an outer screw (301) that penetrates the slide (204), the bevel gear (207) and the inner layer plate (205). The outer screw (301) is threadedly inserted into the bevel gear (207). The inner layer plate (205) is provided with a limiting cylinder (206). The side end of the outer screw (301) is provided with a limiting groove (302) that slides with the limiting cylinder (206).

5. The wind turbine generator cable testing device according to claim 4, characterized in that: The detection plug (3) also includes an inner screw (304) that is threaded into the outer screw (301). The detection probe (306) is fixedly inserted through the inner screw (304) and the tip of the detection probe (306) extends from the end of the outer screw (301) near the cable. The ends of the outer screw (301) and the inner screw (304) are respectively provided with adjustment head one (303) and adjustment head two (305).

6. The wind turbine generator cable testing device according to claim 4, characterized in that: The inner ring of the outer shell (101) is provided with a slide rail (107) located on one side of the mounting through groove (106). The adjustment mechanism (4) includes an arc plate (401). The arc plate (401) is engaged with the slide rail (107) through the slide groove (402) so as to rotate relative to the inner shell (201). The inner shell (201) is provided with a connecting groove (203) on the end face near the arc plate (401). The two arc plates (401) are joined together to form a ring and the connecting grooves (203) on the two inner shells (201) are connected. The end face of the arc plate (401) is provided with a bevel gear disk (403) that passes through the connecting groove (203) and meshes with the bevel gear (207).

7. The wind turbine generator cable testing device according to claim 3, characterized in that: The other end of the outer shell (101) is provided with a rear end plate (104), the rear end plates (104) of the two outer shells (101) are hinged together, and the two front end plates (105) are fixedly connected by bolts.

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