Exposed wire breakage detection device based on conductive liquid and detection method thereof

Abstract

The application discloses a kind of exposed line break detection device and its detection method based on conductive liquid, including box, box includes vertical box, horizontal box and traction box sequentially separated arrangement along the direction of travel of cable, main lead assembly is arranged in traction box, main lead assembly is used to traction cable sequentially through vertical box, horizontal box and traction box, auxiliary lead assembly is arranged between vertical box and horizontal box, auxiliary lead assembly is used to traction cable from vertical box into horizontal box;Realize that cable is independently bent detection in vertical direction and horizontal direction region, can detect the breakage of two directions bending section respectively, avoid the mutual interference of different direction bending action, provide the traction force adapted for different travel stages of cable, make cable each section stress uniform, effectively improve detection efficiency, can independently adjust the degree of bending in different directions.

Description

Technical Field

[0001] This invention relates to the field of cable testing technology, and in particular to a device and method for detecting exposed wire damage based on conductive liquid. Background Technology

[0002] As a crucial carrier for power transmission and signal transmission, the integrity of exposed cables affects their safety. Damage to the sheath can easily lead to safety accidents such as leakage and short circuits. To ensure safe use, damage detection is usually required. This is typically done by immersing the cable in a highly conductive liquid. By monitoring the liquid's charge level in real time while the cable is immersed, it's possible to determine if the cable sheath is damaged, thus achieving the purpose of safety inspection. Because the cable sheath has a certain degree of elasticity, when it is immersed in the highly conductive liquid inside the enclosure, a pulley mechanism is usually installed inside the enclosure to guide the cable bending direction, allowing the damaged area to open up as much as possible. Current technology, such as Chinese patent document CN118641811B, discloses a cable maintenance safety inspection device that uses continuous bending of the cable to open up the damaged area. However, this technical solution still has at least the following drawbacks: all bending actions are performed in a single box, the guiding mechanism has a complex structure and the direction of cable bending does not change after turning, resulting in cumbersome cable installation operations, low detection efficiency, mutual interference between bending actions in different directions, making it impossible to accurately determine which bending direction has damage, making it inconvenient to mark the damaged area, and lacking a graded traction function, resulting in a large traction force on the tail cable, which can easily cause additional damage to the cable, poor travel stability, and difficulty in flexibly adjusting the degree of bending for cables of different diameters, resulting in poor flexibility of use.

[0003] In addition, Chinese patent document CN112978485B discloses a cable fault detection device, which discloses ultrasonic detection of the inside of the cable using ultrasonic waves, damage detection using a resistance tester, and marking using internal and external damage marking machines. However, this solution still has the following defects: First, due to the different diameters, sheath thicknesses, and sheath flexibility of different cables, the fixed bending detection circuit of the cable cannot fully expose the damage location, which is prone to missed detection. Second, if the cable damage gap is small, or only the sheath is cracked but the copper core is not exposed, a conductive circuit cannot be formed, which is also prone to missed detection. Third, ultrasonic testing of the cable results in low detection efficiency for the entire cable. In actual operation, in order to ensure the stability of the ultrasonic waveform and to avoid misjudgment or missed detection of internal defects due to cable movement vibration and radial offset, the cable walking speed should be controlled within 9m / min. If the speed is increased to 10m / min or above, the ultrasonic received waveform is severely distorted, making it impossible to accurately identify defects such as cable damage and internal core wire breakage. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide an exposed wire damage detection device based on conductive liquid. This device physically isolates the vertical and horizontal bending motions of the cable, enabling independent bending detection in separate areas of the cable in each direction. It can detect damage in the bending sections of both directions separately, avoiding mutual interference between bending motions in different directions, thus accurately locating the bending direction of the damage. A graded traction structure is formed by auxiliary and main guide components, providing appropriate traction force for different stages of cable travel, ensuring uniform force on each segment of the cable and preventing additional damage to the tail section due to excessive traction force. Through the cooperation of the first and second extension components, the degree of bending in different directions can be independently adjusted, adapting to cables of different diameters and elastic sheaths. The cable bends in an S-shape in the conductive liquid, resulting in more thorough contact and greater flexibility, improving overall detection efficiency while ensuring detection accuracy.

[0005] Another technical problem that this invention aims to solve is to provide a detection method capable of detecting cable damage, such as exposed core or damaged outer sheath.

[0006] To achieve the above objectives, this application provides an exposed wire damage detection device based on conductive liquid, comprising a housing, characterized in that: the housing includes a vertical housing, a horizontal housing, and a traction housing arranged sequentially along the cable's travel direction; the traction housing is provided with a main guide assembly for traction of the cable; an auxiliary guide assembly for traction of the cable from the vertical housing into the horizontal housing is provided between the vertical housing and the horizontal housing; the vertical housing is provided with a first extension assembly for bending the cable along a first direction; the horizontal housing is provided with a second extension assembly for bending the cable along a second direction; the horizontal housing and the vertical housing are used to contain conductive liquid, and each is provided with a detection assembly adapted to the conductive liquid.

[0007] The first extension component includes two symmetrically arranged first fixed pulleys and a first movable pulley located between the two first fixed pulleys. After the cable passes through the inlet on the side wall of the vertical box, it is wound around the two first fixed pulleys and the first movable pulley in sequence along the vertical direction. The first movable pulley can move up and down to adjust the degree of bending of the cable.

[0008] The vertical box has a first base fixedly connected to its inner bottom wall, and two first fixed pulleys can be detachably installed on the first base. The vertical box has first guide rails symmetrically fixedly installed on its front and rear side walls located between the two first fixed pulleys. A crossbeam is slidably installed on the two first guide rails. A first guide seat is fixedly installed in the middle of the crossbeam. A first movable pulley is detachably installed on the first guide seat. A first screw is rotatably installed on one of the first guide rails. The first screw passes through the crossbeam and is threadedly connected to the crossbeam.

[0009] A wire-holding assembly is provided at the inlet. The wire-holding assembly includes several brackets arranged in a circumferential array around the inlet and a wire-holding wheel fixedly installed on one end of each bracket facing the center of the inlet. Several grooves are opened on the surface of the vertical box. Each bracket is slidably installed in the groove and its two ends extend out of the groove. A spring is fixedly installed on the inner side wall of the groove, and the other end of the spring is fixedly installed on the bracket.

[0010] The auxiliary guide assembly includes a steering wheel and a first motor. The side wall of the vertical box has a steering port corresponding to the steering wheel. The cable extends from the first fixed pulley into the steering port and is wound around the steering wheel. A shaft is rotatably mounted on the outer side wall of the vertical box. The steering wheel is fixedly mounted on the shaft. The first motor is fixedly mounted on the vertical box. The output end of the first motor is connected to one end of the shaft for transmission.

[0011] The auxiliary guide assembly also includes two pressure rollers and a first guide roller. The two pressure rollers and the first guide roller are fixedly installed on the same fixed base. The fixed base is detachably installed on the inner bottom wall of the horizontal box. The first guide roller is located directly below the steering roller. The two pressure rollers are symmetrically arranged on both sides of the first guide roller. The cable passes through the steering roller, wraps around the first guide roller, and then passes between the two pressure rollers.

[0012] The second extension component includes two symmetrically arranged second fixed pulleys and a second movable pulley located between the two second fixed pulleys. After passing through the auxiliary component, the cable is wound horizontally around the second fixed pulley and the second movable pulley in sequence. The second movable pulley can reciprocate horizontally to adjust the degree of bending of the cable.

[0013] The inner bottom wall of the horizontal box is fixedly connected to a second base, and two second fixed pulleys can be detachably installed on the second base; the inner bottom wall of the horizontal box is fixedly installed with a second guide rail, a second guide seat is slidably installed on the second guide rail, a second movable pulley is detachably installed on the second guide seat, a second screw is rotatably installed on the second guide rail, and the second screw passes through the second guide seat and is threadedly connected to the second guide seat.

[0014] The main guide assembly includes a second guide wheel fixedly installed on the side wall of the horizontal box, a cleaning component disposed in the cable outlet, and cable feed belts symmetrically arranged vertically within the traction box. The cable passes through the cleaning component after being wound around the second guide wheel via the second extension component and enters the traction box. The cable extends out of the traction box after passing through the two cable feed belts. Each cable feed belt includes an annular belt and two rubber cable feed wheels. The two rubber cable feed wheels are rotatably mounted on a partition plate inside the traction box, and the annular belt is wound around the two rubber cable feed wheels. In the upper cable feed belt, a first gear and a second motor are fixedly installed at both ends of the axle of one of the rubber cable feed wheels, respectively. In the lower cable feed belt, a second gear is fixedly installed at one end of the axle of one of the rubber cable feed wheels. The first gear and the second gear are meshed. Two symmetrically arranged guide plates are provided between the two cable feed belts. Telescopic rods are fixedly installed on opposite sides of the two guide plates, and one end of the telescopic rod is fixedly installed on the partition plate.

[0015] The detection assembly includes a detector and a probe electrically connected to the detector. The detector is installed on the outside of the housing, and the probe is inserted into the conductive liquid in the horizontal and vertical housings respectively.

[0016] A detection method for detecting cable damage defects employs the aforementioned exposed wire damage detection device based on conductive liquid. The detection method includes the following steps:

[0017] Step 1: Adjust the first extension component and the second extension component according to the diameter of the cable to be tested, so as to preset the required degree of bending of the cable in the vertical and horizontal directions; Step 2: Insert one end of the cable into the vertical box through the cable inlet of the box, then wrap it in an S-shape on the first extension component in the vertical direction, then go around the auxiliary guide component into the horizontal box, then wrap it in an S-shape on the second extension component in the horizontal direction, then insert it into the main guide component, and finally extend it out from the tail of the traction box. Step 3: Add conductive liquid to the horizontal and vertical boxes respectively; and connect the terminal wire of the detector to the end of the cable. Step 4: Start the main guide assembly and auxiliary guide assembly to make the cable pass through the vertical box and the horizontal box at a constant speed. During the journey, the cable achieves multi-directional bending in the vertical direction through the first extension assembly in the vertical box, and multi-directional bending in the horizontal direction through the second extension assembly in the horizontal box. Step 5: The probe monitors the changes in the electrical properties of the liquid in real time. When the damaged part of the cable is exposed inside a box, the corresponding detector will issue an alarm signal.

[0018] The conductive liquid contains suspended micro-powder that can be attracted by a magnetic field. When the cable is damaged and the core is exposed, the inner core of the cable, the damaged and exposed part, the conductive liquid, the probe and the detector form a closed detection circuit and generate a working current. The damaged and exposed part forms a local ring-shaped induced magnetic field based on the working current. The local ring-shaped induced magnetic field adsorbs the micro powder in the conductive liquid and accumulates in the damaged gap. When only the outer sheath of the cable is damaged, as the cable bends through the first extension component and the second extension component, the gap in the outer sheath at the damaged point opens, and the micro powder flows with the conductive liquid to the opening of the damage. After the cable passes through the second extension assembly, the damaged insulation layer closes, trapping the micro-powder at the damaged core. Next, the cable is inspected using flaw detection equipment. Based on the different locations of the micro powder distribution, the cable is determined to be damaged, either with a missing core or with a damaged outer sheath, as well as the extent of the damage.

[0019] Compared with the prior art, the above-conceptual technical solution conceived in this application has the following beneficial effects: 1. By physically isolating the vertical and horizontal bending motions of the cable, independent bending detection is achieved in separate areas in the vertical and horizontal directions. This allows for the separate detection of damage in the bending sections in both directions, avoiding mutual interference between bending motions in different directions. This enables precise location of the bending direction of the damage, making operation simpler and more convenient, cable installation easier, and more accurate determination of the bending direction of cable damage, thus improving detection efficiency.

[0020] 2. The auxiliary and main guide components form a graded traction structure, providing appropriate traction force for different stages of cable travel, ensuring uniform force on each section of the cable, avoiding additional damage to the tail cable due to excessive traction force, greatly improving the stability of cable travel, and effectively improving detection efficiency.

[0021] 3. Through the cooperation of the first extension component and the second extension component, the degree of bending in different directions can be adjusted independently, adapting to cables of different diameters and elastic sheaths. The cable bends in an S-shape in the conductive liquid, making fuller contact and more flexible in use, thus improving the overall detection efficiency while ensuring detection accuracy.

[0022] 4. Each pulley is detachable and can be quickly replaced during maintenance. It is also better adapted to the testing of cables of different specifications, offering more options, effectively expanding the applicable scenarios, and improving the application range of the testing device.

[0023] 5. Real-time monitoring of liquid electrical changes via probes. When a cable break is exposed within a housing, the corresponding detector issues an alarm signal, indicating cable damage and exposed core. As the cable bends through the first and second extension components, the outer sheath at the break opens, allowing microparticles to flow with the conductive liquid to the opening, thus marking the cable break for identification by electromagnetic flaw detection. Electromagnetic flaw detection equipment then examines the cable, determining whether the break is due to core leakage or sheath damage based on the distribution of microparticles and their permeability, as well as the degree of damage. Furthermore, electromagnetic flaw detection requires no coupling agent, is independent of surface adhesion, and is unaffected by air gaps, making it suitable for high-speed cable routing. Detection speeds can reach approximately 50 m / min, resulting in higher detection efficiency. Attached Figure Description

[0024] 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 only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the frontal axonometric structure of the present invention.

[0026] Figure 2 This is a front-view cross-sectional view of the first extension component of the present invention.

[0027] Figure 3 This is a top-view cross-sectional view of the second extension component of the present invention.

[0028] Figure 4 This is a schematic diagram of the right-side cross-sectional structure of the vertical box of the present invention.

[0029] Figure 5 This is a schematic diagram of the main guide component structure of the present invention.

[0030] Figure 6 This is a front-view cross-sectional view of the feeder belt structure of the present invention.

[0031] Figure 7 This is a schematic diagram of the guide plate structure of the present invention.

[0032] Figure 8 This is a schematic diagram of the winding wheel structure of the present invention.

[0033] Figure label: 1. Housing; 2. Traction box; 3. Horizontal box; 4. Vertical box; 5. Main guide assembly; 6. Cable; 7. Auxiliary guide assembly; 8. First extension assembly; 9. Second extension assembly; 10. First fixed pulley; 11. First movable pulley; 12. First base; 13. First guide seat; 14. First guide rail; 15. Crossbeam; 16. First screw; 17. Cable inlet; 18. Bracket; 19. Cable holding wheel; 20. Slide groove; 21. Steering wheel; 22. First motor; 23. Steering port; 24. Shaft; 25. Wire pressing wheel; 26. First guide wheel; 27. Fixed seat; 28. Second fixed pulley; 29. ​​Second movable pulley; 30. Second base; 31. Second guide seat; 32. Second guide rail; 33. Second screw; 34. Second guide wheel; 35. Cable outlet; 36. Cleaning component; 37. Cable feed belt; 38. Circular belt; 39. Rubber cable feed wheel; 40. Partition plate; 41. First gear; 42. Second motor; 43. Second gear; 44. Guide plate; 45. Telescopic rod; 46. Detector; 47. Probe; 48. Spring; 49. Rewinding wheel; 50. Platform; 51. Control box; 52. Storage box; 53. Fan. Detailed Implementation

[0034] To more clearly illustrate the purpose, technical solution, and beneficial effects of this application, a further detailed description of this application is provided below in conjunction with illustrations and specific embodiments. It should be specifically noted that the specific embodiments described below are only for illustrating the technical content of this application and do not constitute a limitation on the scope of protection of this application.

[0035] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Example 1: See Figure 1-8 Some embodiments of the present invention relate to an exposed wire damage detection device based on conductive liquid, including a housing 1. The housing 1 includes a vertical housing 4, a horizontal housing 3, and a traction housing 2 arranged sequentially along the travel direction of the cable 6. A main guide assembly 5 is provided in the traction housing 2, which is used to guide the cable 6 sequentially through the vertical housing 4, the horizontal housing 3, and the traction housing 2. An auxiliary guide assembly 7 is provided between the vertical housing 4 and the horizontal housing 3, which is used to guide the cable 6 from the vertical housing 4 into the horizontal housing 3. A first extension assembly 8 is provided in the vertical housing 4 for bending the cable 6 in the vertical direction, and a second extension assembly 9 is provided in the horizontal housing 3 for bending the cable 6 in the horizontal direction. Both the horizontal housing 3 and the vertical housing 4 contain conductive liquid and are each provided with a detection assembly adapted to the conductive liquid.

[0038] In these embodiments, by dividing the housing 1 into a vertical housing 4, a horizontal housing 3, and a traction housing 2 along the direction of cable 6 travel, the vertical and horizontal bending movements of cable 6 are physically isolated. This allows for independent bending detection of cable 6 in separate areas in the vertical and horizontal directions, and also enables independent adjustment of the bending degree in different directions. This accommodates cables 6 with different diameters and elastic sheaths, avoiding mutual interference between bending movements in different directions. Simultaneously, the vertical housing 4 and the horizontal housing 3 independently contain conductive liquid and are equipped with dedicated detection components, enabling separate detection of damage to the bending sections in both directions, thus accurately locating the direction of the breakage. Cable 6 first enters the vertical housing 4, where it undergoes bending deformation in the vertical direction under the action of the first extension component 8, fully opening up the vertically damaged area. Then, it is redirected by the traction component 7 into the horizontal housing 3, where it undergoes bending deformation in the horizontal direction under the action of the second extension component 9, further opening up the horizontally damaged area. A graded traction structure is formed by the auxiliary guide component 7 and the main guide component 5, providing appropriate traction force for different stages of cable 6's movement. This ensures uniform force distribution across all segments of cable 6 and prevents additional damage to the tail section due to excessive traction force. By setting targeted first extension components 8 and second extension components 9 for the vertical box 4 and horizontal box 3 respectively, operation is not only simpler and more convenient, but the bending direction of cable 6 damage can also be accurately determined, improving detection efficiency. Furthermore, the appropriate traction force provided for different stages of cable 6's movement, combined with multi-wheel guidance and active traction, significantly improves the stability and smoothness of cable 6's movement, effectively enhancing detection efficiency and increasing flexibility. Further, based on the bending principle of the first extension components 8 and second extension components 9, multiple bending directions can be added to this embodiment (four directions), such as increasing to six bending directions by adding extension components. Since the structure and principle are the same, they will not be elaborated upon in this article, but only illustrated by examples. It should be understood that cable 6 in the figure is only for illustrative purposes and does not represent the actual cable 6. In addition, each rotating shaft of the vertical box 4 and the horizontal box 3 is equipped with a sealing ring (not shown in the figure) to ensure airtightness. The selection of the material and model of each pulley in this article is not specifically limited. For example, metal pulleys, rubber pulleys, etc. can be used. The selection can be flexibly adjusted according to the actual use requirements. In addition, if necessary, the fixed pulley can be replaced by a metal rod so that cable 6 passes around the metal rod.

[0039] In some embodiments, the inlet end of the vertical box 4 is provided with a cable-holding assembly. The first extension assembly 8 includes two symmetrically arranged first fixed pulleys 10 and a first movable pulley 11 located between the two first fixed pulleys 10. After passing through the cable-holding assembly, the cable 6 is wound in an S-shape around the first fixed pulleys 10 and the first movable pulley 11. The first movable pulley 11 can perform lifting and lowering movements to adjust the degree of bending of the cable 6.

[0040] In these embodiments, the cable 6 is positioned and guided by the cable-holding assembly to prevent deviation during cable entry. The cable 6 is sequentially wound around the first fixed pulley 10, the first movable pulley 11 on one side and the first fixed pulley 10 on the other side in an S-shaped path, which extends the cable's travel path in the conductive liquid inside the vertical box 4, making the contact between the cable and the conductive liquid more sufficient. At the same time, the S-shaped bend allows the cable to form effective deformation in the vertical direction, causing the damaged parts of the cable sheath to fully open, ensuring that the damaged parts are in proper contact with the conductive liquid. Furthermore, when the first movable pulley 11 moves up and down, its relative position with the first fixed pulleys 10 on both sides changes, changing the wrapping angle of the cable 6, thereby adjusting the degree of bending of the cable 6 in the vertical direction. This allows for free adjustment of the degree of bending of the cable in the vertical direction, and can be adjusted to the optimal bending state according to the diameter of the cable and the elastic characteristics of the sheath, improving the flexibility of the device and meeting the testing needs of different types of cables.

[0041] In some embodiments, the inner bottom wall of the vertical box 4 is fixedly connected to a first base 12, and both first fixed pulleys 10 can be detachably installed on the first base 12.

[0042] The front and rear side walls of the vertical box 4 are symmetrically fixedly equipped with first guide rails 14. Crossbeams 15 are slidably installed on the two first guide rails 14. A first guide seat 13 is fixedly installed in the middle of the crossbeam 15. A first movable pulley 11 is detachably installed on the first guide seat 13. A first screw 16 is rotatably installed on one of the first guide rails 14. The first screw 16 passes through the crossbeam 15 and is threadedly connected to the crossbeam 15.

[0043] In these embodiments, both the first fixed pulley 10 and the first movable pulley 11 are detachably installed, for example, by threaded installation. Both the first fixed pulley 10 and the first movable pulley 11 have frames, and the pulleys are rotatably mounted on the frames (the pulleys described below have the same structure and will not be repeated in this article). They are installed in the corresponding threaded holes through the threaded post on the frame, or they can be fixed by pins, snap-fit, or other adaptation methods. When the pulleys are worn, need maintenance, or need to be replaced, they can be quickly disassembled and replaced, improving the ease of maintenance of the device. They are also easy to adapt to the transmission of different specifications of cables 6, making them more flexible in use. The first movable pulley 11 is mounted on the crossbeam 15 via the first guide seat 13. Both ends of the crossbeam 15 are slidably engaged with two symmetrically arranged first guide rails 14, forming a stable guide support structure. This ensures that the crossbeam 15 maintains a horizontal position when driving the first movable pulley 11 up and down, guaranteeing the uniformity of the vertical bending of the cable 6. During operation, rotating the first screw 16 (its end with a rocker wheel) drives the crossbeam 15 to smoothly rise and fall along the first guide rails 14 via threaded transmission, thereby driving the first movable pulley 11 to move up and down. Due to the self-locking characteristic of the thread, the height of the first movable pulley 11 can be stably maintained at any position, thus precisely controlling the degree of cable bending and improving detection accuracy. Furthermore, to improve the smoothness of the lifting process, two first screws 16 can be threadedly connected to both ends of the crossbeam 15 and linked by a synchronous belt or gear mechanism to achieve synchronous drive on both sides (not shown in the figure).

[0044] In some embodiments, the vertical box 4 has a cable inlet 17 at its cable inlet end, and a cable holding assembly is provided at the cable inlet 17. The cable holding assembly includes a number of brackets 18 arranged in a circumferential array around the cable inlet 17 and a cable holding wheel 19 fixedly installed on one end of each bracket 18 facing the center of the cable inlet 17. A number of sliding grooves 20 are provided on the surface of the vertical box 4. Each bracket 18 is slidably installed in the sliding groove 20 and its two ends extend out of the sliding groove 20 respectively. A spring 48 is fixedly installed on the inner side wall of the sliding groove 20, and the other end of the spring 48 is fixedly installed on the bracket 18.

[0045] In these embodiments, multiple cable-holding wheels 19 are distributed around the center of the cable inlet 17 in a circumferential direction, together forming a channel for the cable 6 to pass through, ensuring that the cable 6 can travel smoothly. When cables 6 of different diameters are passed through, the outer wall of the cable 6 pushes the cable-holding wheels 19 and the bracket 18 to slide radially outward along the slide groove 20, and the spring 48 is compressed, thereby generating a radially inward clamping force, so that each cable-holding wheel 19 adaptively presses the surface of the cable 6, which can adapt to cables 6 of different diameters, greatly improving the flexibility and adaptability of the device.

[0046] It should be understood that the liquid level of the conductive liquid in the vertical box 4 and the horizontal box 3 is much lower than the cable inlet 17, cable outlet 35, turning port 23 and other cable-passing ports at the top of the box 1, just enough to immerse the bent cable 6, thereby avoiding leakage of the conductive liquid.

[0047] In some embodiments, the auxiliary assembly 7 includes a steering wheel 21 and a first motor 22. The side wall of the vertical box 4 has a steering port 23 corresponding to the steering wheel 21. The cable 6 extends from the first fixed pulley 10 into the steering port 23 and is wound around the steering wheel 21. The outer side wall of the vertical box 4 is rotatably mounted with a shaft 24. The steering wheel 21 is fixedly mounted on the shaft 24. The first motor 22 is fixedly mounted on the vertical box 4. The output end of the first motor 22 is fixedly connected to one end of the shaft 24.

[0048] In these embodiments, the first motor 22 is fixedly mounted on the vertical box 4 via a mounting base, and the shaft 24 is rotatably mounted on the vertical box 4 via a bracket. The position of the steering wheel 21 corresponds precisely to the steering port 23, providing smooth directional change support for the cable 6. After the cable 6 completes the bending detection within the vertical box 4, it extends through the steering port 23 and wraps around the steering wheel 21. The first motor 22 drives the steering wheel 21 to rotate actively via the shaft 24, providing auxiliary traction force for the cable 6 to turn from the vertical box 4 to the horizontal box 3. This avoids uneven force distribution caused by the cable relying solely on tail traction, thus preventing the cable 6 from getting stuck or damaged due to excessive bending resistance, and significantly improving the speed and stability of the cable 6's turning movement.

[0049] In some embodiments, the auxiliary guide assembly 7 further includes two wire pressing wheels 25 and a first guide wheel 26. The two wire pressing wheels 25 and the first guide wheel 26 are all fixedly mounted on the same fixed base 27. The fixed base 27 is detachably mounted on the inner bottom wall of the horizontal box 3. The first guide wheel 26 is located directly below the steering wheel 21. The two wire pressing wheels 25 are symmetrically arranged on both sides of the first guide wheel 26. The cable 6 passes through the two wire pressing wheels 25 after being wound around the first guide wheel 26 via the steering wheel 21.

[0050] In these embodiments, after the cable 6 exits from the steering wheel 21, it winds downwards onto the first guide wheel 26 and then passes between the two pressure rollers 25. The first guide wheel 26 is arranged vertically opposite to the steering wheel 21, allowing the cable 6 to change direction before entering the horizontal box 3. The two symmetrically arranged pressure rollers 25 gently press and position the cable 6 from both sides, keeping the cable 6 in a horizontal traveling posture and preventing it from slipping out of the groove or shifting when it subsequently enters the second extension assembly 9. The fixing base 27 is detachable, facilitating the maintenance and replacement of the pressure rollers 25 and the first guide wheel 26. Different specifications of pressure rollers 25 can be replaced according to testing requirements to accommodate cables 6 of different diameters. Through the multi-wheel cooperation structure of the auxiliary assembly 7, a smooth transition of the cable from the vertical box 4 to the horizontal box 3 is achieved.

[0051] In some embodiments, the second extension component 9 includes two symmetrically arranged second fixed pulleys 28 and a second movable pulley 29 located between the two second fixed pulleys 28. The cable 6 is wound in an S-shape around the second fixed pulleys 28 and the second movable pulley 29 after passing through the guide component 7. The second movable pulley 29 can reciprocate in the horizontal direction to adjust the degree of bending of the cable 6.

[0052] In these embodiments, after the cable 6 enters the horizontal box 3, it winds in an S-shaped path around the second fixed pulley 28 on one side, the second movable pulley 29, and the second fixed pulley 28 on the other side. The damaged area of ​​the cable 6's outer sheath is fully opened, allowing the cable 6 to fully contact the conductive liquid. As the second movable pulley 29 moves horizontally, it changes the wrap angle of the cable 6 in the horizontal plane, thereby adjusting the degree of bending of the cable 6 in the horizontal direction. This allows for optimal bending based on the diameter and elastic characteristics of the cable 6's outer sheath, adapting to the testing requirements of different types of cables 6. In conjunction with the first extension component 8, the cable 6 can independently complete bidirectional bending tests in both the vertical and horizontal directions within the vertical box 4 and the horizontal box 3. The bending actions in the two directions do not interfere with each other, facilitating accurate determination of the location of the damage.

[0053] In some embodiments, a second base 30 is fixedly connected to the inner bottom wall of the horizontal box 3, and both second fixed pulleys 28 can be detachably installed on the second base 30; A second guide rail 32 is fixedly installed on the inner bottom wall of the horizontal box 3. A second guide seat 31 is slidably installed on the second guide rail 32. A second movable pulley 29 is detachably installed on the second guide seat 31. A second screw 33 is rotatably installed on the second guide rail 32. The second screw 33 passes through the second guide seat 31 and is threadedly connected to the second guide seat 31.

[0054] In these embodiments, both the second fixed pulley 28 and the second movable pulley 29 are detachable, with the same detachable principle as the first extension component 8 described above, facilitating maintenance and adaptation. The second guide rail 32 provides guidance and limitation for the movement of the second guide seat 31, enabling the second guide seat 31 to drive the second movable pulley 29 to move stably horizontally. When the second screw 33 is rotated (its end wheel), the second guide seat 31 and the second movable pulley 29 are driven to move horizontally along the second guide rail 32 through threaded transmission. The self-locking characteristic of the thread allows the second movable pulley 29 to be stably maintained at any horizontal position, ensuring the uniformity of the horizontal bending of the cable and meeting different testing requirements.

[0055] In some embodiments, the main guide assembly 5 includes a second guide wheel 34 fixedly installed on the side wall of the horizontal box 3, a cleaning component 36 disposed in the cable outlet 35, and cable feed belts 37 symmetrically disposed in the traction box 2. The cable 6 passes through the cleaning component 36 after being wrapped around the second guide wheel 34 by the second extension assembly 9, and then extends out of the traction box 2 after passing through the two cable feed belts 37.

[0056] Each wire feeding belt 37 includes an annular belt 38 and two rubber wire feeding wheels 39. The two rubber wire feeding wheels 39 are rotatably mounted on the partition 40 inside the traction box 2, and the annular belt 38 is wound around the two rubber wire feeding wheels 39.

[0057] In the upper wire feeding belt 37, a first gear 41 and a second motor 42 are fixedly installed at both ends of the axle of one of the rubber wire feeding wheels 39. In the lower wire feeding belt 37, a second gear 43 is fixedly installed at one end of the axle of one of the rubber wire feeding wheels 39. The first gear 41 and the second gear 43 are meshed. Two symmetrically arranged guide plates 44 are provided between the two wire conveyors 37. Telescopic rods 45 are fixedly installed on the opposite sides of the two guide plates 44, and one end of the telescopic rods 45 is fixedly installed on the partition plate 40.

[0058] In these embodiments, the guide plate 44 is arranged along the transmission direction of the cable conveyor belt 37 (the direction of cable 6 travel) to ensure flexible clamping of the cable 6. The cleaning component 36 can be made of sponge or felt, preferably a sponge, to absorb residual conductive liquid on the surface of the cable 6. After the cable 6 completes the inspection in the horizontal box 3, it is turned by the second guide wheel 34, passes through the cleaning component 36 in the outlet 35, and enters the traction box 2. The second guide wheel 34 guides the cable 6 from the horizontal box 3 to the traction box 2, allowing the cable to smoothly enter between the cleaning component 36 and the cable conveyor belt 37. After entering the traction box 2, the cable 6 passes between the upper and lower cable conveyor belts 37. The second motor 42 drives the rubber cable conveyor wheel 39 of the upper cable conveyor belt 37 to rotate. Through the meshing transmission of the first gear 41 and the second gear 43, the lower cable conveyor belt 37 is driven to rotate synchronously in the opposite direction, so that the upper and lower annular belts 38 jointly clamp the cable 6 and transport it forward. The cable 6 is propelled at a constant and stable speed throughout the entire testing process by the feed belt 37, working in conjunction with the auxiliary guide assembly 7 to achieve graded traction of the cable, ensuring uniform force distribution across all sections of the cable 6. Due to the deformation of the rubber feed roller 39, the cable 6 is stably clamped between the two feed belts 37. The telescopic rod 45 is an elastic telescopic rod with a buffer spring, which buffers the clamping force of the guide plate 44, ensuring effective positioning of the cable 6. Driven by the telescopic rod 45, the guide plates 44 can move towards or away from each other, thereby adjusting the gap between the two guide plates 44 to accommodate cables 6 of different diameters. Additionally, a cable-holding assembly can be installed at the outlet of the traction box 2 to ensure the stability of the cable exit. A fan 53 is fixedly installed on the side of the traction box 2 near the outlet 35, which quickly dries the cable 6, ensuring its cleanliness and safety.

[0059] Furthermore, such as Figure 8 As shown, the traction component can also be a winding reel 49. The winding reel 49 is mounted inside the traction box 2 via a bracket and is driven by a drive motor. When the cable needs to be wound up, the winding reel 49 can efficiently wind up and store the cable 6. When the cable does not need to be wound up, it can be directly passed through the cable feed belt 37 for subsequent direct use. The traction method can be flexibly selected according to the usage requirements. This article does not impose specific limitations but only provides examples.

[0060] In some embodiments, the detection assembly includes a detector 46 and a probe 47 electrically connected to the detector 46. The detector 46 is mounted on the outer surface of the horizontal box 3 and the vertical box 4, respectively, and the probe 47 extends into the conductive liquid inside the horizontal box 3 and the vertical box 4, respectively.

[0061] In these embodiments, probe 47 is immersed in conductive liquid. When a section of cable 6 is damaged, its internal conductor is exposed and comes into contact with the conductive liquid, energizing the conductive liquid inside that section of the cable. This triggers detector 46, which monitors the conductive liquid in real time via probe 47. When detector 46 of a particular section issues an alarm signal, it can accurately determine whether the damage occurred in a vertical or horizontal bending direction, thus providing precise information for subsequent repair and positioning. Optionally, detector 46 can be a resistance detector or a current detector, or it can employ a dual audible and visual alarm design. When it detects that the conductive liquid is energized, it immediately issues both a light and an audible alarm signal. During detection, detector 46 and probe 47 are connected, with the end of probe 47 immersed in the conductive liquid. Simultaneously, a wire extends from detector 46 and connects to the end of the cable being tested. If the cable being tested is damaged during forward transport, detector 46 conducts through the cable and issues an alarm, thus detecting the damage.

[0062] In some further embodiments, the box 1 is fixedly installed on the platform 50, and a control box 51 and a storage box 52 are respectively provided on both sides of the vertical box 4. The control box 51 is equipped with a control device for efficient detection and operation, and the storage box 52 stores parts and other tools for maintenance or replacement of pulleys, etc., to ensure flexible use in different scenarios.

[0063] In some embodiments, the housing 1 is made of an insulating material, such as plastic.

[0064] Example 2: The present invention also proposes a detection method, which employs the exposed wire damage detection device based on conductive liquid in Example 1, and includes the following steps: Step 1: Adjust the first extension component 8 and the second extension component 9 according to the diameter of the cable 6 to be tested, so as to preset the required degree of bending of the cable 6 in the vertical and horizontal directions. Step 2: Insert one end of cable 6 into the vertical box 4 through the inlet 17 of the box 1, then wrap it in an S-shape on the first extension component 8 in the vertical direction, then pass it around the auxiliary guide component 7 into the horizontal box 3, then wrap it in an S-shape on the second extension component 9 in the horizontal direction, then insert it into the main guide component 5, and finally extend it out from the tail of the traction box 2. Step 3: Add conductive liquid to the horizontal box 3 and the vertical box 4 respectively; and connect the terminal wire of the detector 46 to the end of the cable 6. Step 4: Start the main guide component 5 and the auxiliary guide component 7 to make the cable 6 pass through the vertical box 4 and the horizontal box 3 at a constant speed. During the movement, the cable 6 achieves multi-directional bending in the vertical direction in the vertical box 4 through the first extension component 8, and achieves multi-directional bending in the horizontal direction in the horizontal box 3 through the second extension component 9. Step 5: Probe 47 monitors the changes in the electrical properties of the liquid in real time. When the damaged part of cable 6 is exposed inside a box, the corresponding detector 46 will issue an alarm signal.

[0065] Specifically, firstly, based on the diameter of the cable 6 to be tested, the lifting height of the first movable pulley 11 is adjusted by the first screw 16, and the horizontal position of the second movable pulley 29 is adjusted by the second screw 33, so as to preset the required degree of bending in the vertical and horizontal directions. At the same time, the spacing of the guide plates 44 is adjusted by the telescopic rod 45, so that a clamping channel matching the diameter of the cable 6 is formed between the two cable feed belts 37.

[0066] Subsequently, the end of cable 6 is sequentially threaded into the inlet 17, and after being adaptively clamped by the cable clamping assembly, it is wound in an S-shape between the first fixed pulley 10 and the first movable pulley 11. After cable 6 exits from the first fixed pulley 10, it passes through the turning port 23 and is wound around the turning wheel 21, then turns after being turned by the first guide wheel 26 and passes through the two pressure rollers 25 into the horizontal box 3. Inside the horizontal box 3, cable 6 is wound in an S-shape between the second fixed pulley 28 and the second movable pulley 29. After cable 6 exits from the second fixed pulley 28, it turns after being turned by the second guide wheel 34, passes through the cleaning component 36 into the traction box 2, and is clamped between the two cable delivery belts 37, finally extending out from the tail of the traction box 2.

[0067] The second motor 42 is started, driving the cable conveyor belt 37 to operate and providing active traction for the cable 6, allowing the cable 6 to pass through the vertical box 4 and the horizontal box 3 at a constant speed. Simultaneously, the first motor 22 is started to provide auxiliary traction for the cable 6. During its movement, the cable 6 undergoes bidirectional vertical bending via the first extension component 8 within the vertical box 4, and bidirectional horizontal bending via the second extension component 9 within the horizontal box 3. Both boxes are filled with conductive liquid, and the probe 47 monitors the changes in the liquid's electrical properties in real time. When a damaged section of the cable 6 is exposed within one of the boxes, the detector 46 within that box emits an alarm signal, allowing for precise location and direction of the damage.

[0068] After inspection, cable 6 is wiped clean of residual liquid by cleaning component 36, then fed out by cable conveyor belt 37 and wound up. The entire inspection process achieves independent handling of vertical and horizontal bending, ensuring the accuracy, safety, and efficiency of the inspection.

[0069] Example 3: Based on Example 2, this application incorporates suspended micro-powders, such as those approximately 10 μm in size, into a conductive liquid. Powder. A small amount of dispersant is added to the conductive liquid to prevent the magnetic powder from agglomerating, so as to make the micro powder uniformly suspended.

[0070] When cable 6 is damaged and has an exposed core, the cable core, the damaged / exposed core area, the conductive liquid, probe 47, and detector 46 form a closed detection circuit, generating a working current. The damaged / exposed core area, relying on this working current, forms a localized annular induced magnetic field. This field attracts fine powder from the conductive liquid, which accumulates within the damaged area. At this point, the fine powder adheres to the copper core. Since the copper core is multi-stranded, the powder extends along the gaps between the strands. Subsequent rapid detection using electromagnetic flaw detection causes a drastic change in permeability, resulting in a significant vertical displacement of the light spot, which persists for a period of time. The duration of this displacement is influenced by the length of the accumulated fine powder within the cable core.

[0071] When only the outer sheath of cable 6 is damaged, as cable 6 is bent through the first extension component 8 and the second extension component 9, the outer sheath at the damaged point opens, and the micro powder flows with the conductive liquid to the opening of the damage.

[0072] After the cable 6 passes through the second extension component 9, the damaged insulation layer closes, trapping the microparticles at the damaged core.

[0073] Subsequently, the cable 6 was inspected using electromagnetic flaw detection equipment. Based on the distribution location of the micro powder and the difference in magnetic permeability, the extent of damage to the cable 6, including whether the core was broken or the outer sheath was damaged, was determined.

[0074] When the cable's outer sheath is damaged and the core is exposed, the microparticles are widely distributed and have a relatively high permeability; when the outer sheath is damaged, the microparticles are distributed in a smaller area and have a lower permeability. Based on the distribution range of the microparticles and the magnitude of the permeability, the degree of damage can be further determined. The wider the distribution range of the microparticles, the more severe the damage.

[0075] Using the above method, the probe 47 monitors the changes in the electrical properties of the liquid in real time. When the damaged part of the cable 6 is exposed inside a box, the corresponding detector 46 issues an alarm signal, indicating that the cable is damaged and the wire core is exposed.

[0076] When cable 6 is bent by the first extension component 8 and the second extension component 9, the outer sheath at the damaged point opens, and the micro powder flows with the conductive liquid to the damaged opening, thereby marking the damaged point of cable 6.

[0077] During subsequent electromagnetic flaw detection, the marking machine structure described in CN112978485B can be used to mark the damaged areas for workers to observe. Cable breaks with exposed cores and ruptured outer sheaths are marked with different symbols, making it easier for workers to handle the defects separately.

[0078] Of course, the electromagnetic flaw detection equipment can also be integrated at the rear of the housing 1. After the cable 6 exits from the outlet 35, it enters the electromagnetic flaw detection equipment, is marked, and then is wound up.

[0079] Furthermore, the detector 46 adaptively adjusts its output operating current according to the length of the cable 6 passing through the detection device, so that the conduction current at the damaged and leaking cores at different locations on the cable 6 is maintained within a preset range.

[0080] Chinese patent document CN112978485B employs a single-set fixed ultrasonic transmitter and receiver for one-sided fixed-point detection of a cable. The cable is pulled linearly through the ultrasonic testing station at a uniform speed by a cable reel. In actual operation, to ensure stable ultrasonic waveforms and prevent misjudgment or missed detection of internal defects due to cable movement vibrations or radial offset, the cable travel speed must be strictly limited to within 9 m / min (150 mm / s). If the speed is increased to 10 m / min or higher, the ultrasonic waveform distortion is severe, making it impossible to accurately identify defects such as cable breakage and internal core wire fractures. Taking a single cable length of 1000 m as an example, at a speed of 9 m / min, ultrasonic testing would take 112 minutes.

[0081] In this embodiment, electromagnetic flaw detection equipment is used for subsequent flaw detection. For example, the flaw detection equipment disclosed in CN205720097U is used, with the cable passing between the excitation probe and the detection probe. Copper in the cable is a diamagnetic material. When using electromagnetic flaw detection, it does not require a coupling agent, does not rely on surface bonding, and is unaffected by air gaps, making it suitable for high-speed cable routing. The detection speed can reach over 50 m / min. Taking a single cable length of 1000m as an example, at 50 m / min, the entire detection process takes no more than 20 minutes, representing a significant improvement in detection speed.

[0082] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0083] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting damage to exposed wires based on conductive liquid, comprising a housing (1), characterized in that: The housing (1) includes a vertical housing (4), a horizontal housing (3) and a traction housing (2) arranged sequentially along the travel direction of the cable (6). The traction housing (2) is provided with a main guide assembly (5) for pulling the cable (6). An auxiliary guide assembly (7) for pulling the cable (6) from the vertical housing (4) into the horizontal housing (3) is provided between the vertical housing (4) and the horizontal housing (3). The vertical housing (4) is provided with a first extension assembly (8) for bending the cable (6) in a first direction. The horizontal housing (3) is provided with a second extension assembly (9) for bending the cable (6) in a second direction. The horizontal housing (3) and the vertical housing (4) are used to contain conductive liquid and are respectively provided with detection components adapted to the conductive liquid.

2. The exposed wire damage detection device based on conductive liquid according to claim 1, characterized in that, The first extension component (8) includes two symmetrically arranged first fixed pulleys (10) and a first movable pulley (11) located between the two first fixed pulleys (10). After the cable (6) passes through the inlet (17) on the side wall of the vertical box (4), it is wound around the two first fixed pulleys (10) and the first movable pulley (11) in the vertical direction. The first movable pulley (11) can move up and down to adjust the degree of bending of the cable (6).

3. A device for detecting exposed wire damage based on conductive liquid according to claim 2, characterized in that, The bottom wall of the vertical box (4) is fixedly connected to the first base (12), and both first fixed pulleys (10) can be detachably installed on the first base (12); The vertical box (4) has first guide rails (14) symmetrically fixedly installed on the front and rear side walls between the two first fixed pulleys (10). A crossbeam (15) is slidably installed on the two first guide rails (14). A first guide seat (13) is fixedly installed in the middle of the crossbeam (15). A first movable pulley (11) is detachably installed on the first guide seat (13). A first screw (16) is rotatably installed on one of the first guide rails (14). The first screw (16) passes through the crossbeam (15) and is threadedly connected to the crossbeam (15).

4. A device for detecting exposed wire damage based on conductive liquid according to claim 2, characterized in that, A wire-holding assembly is provided at the inlet (17). The wire-holding assembly includes several brackets (18) arranged in a circumferential array around the inlet (17) and a wire-holding wheel (19) fixedly installed on one end of each bracket (18) facing the center of the inlet (17). Several sliding grooves (20) are provided on the surface of the vertical box (4). Each bracket (18) is slidably installed in the sliding groove (20) and its two ends extend out of the sliding groove (20). A spring (48) is fixedly installed on the inner side wall of the sliding groove (20), and the other end of the spring (48) is fixedly installed on the bracket (18).

5. The exposed wire damage detection device based on conductive liquid according to claim 1, characterized in that, The auxiliary guide assembly (7) includes a steering wheel (21) and a first motor (22). The side wall of the vertical box (4) is provided with a steering port (23) corresponding to the steering wheel (21). The cable (6) extends from the first fixed pulley (10) into the steering port (23) and is wound around the steering wheel (21). The outer side wall of the vertical box (4) is rotatably mounted with a shaft (24). The steering wheel (21) is fixedly mounted on the shaft (24). The first motor (22) is fixedly mounted on the vertical box (4). The output end of the first motor (22) is connected to one end of the shaft (24) for transmission.

6. A device for detecting exposed wire damage based on conductive liquid according to claim 5, characterized in that, The auxiliary guide assembly (7) also includes two pressure rollers (25) and a first guide roller (26). The two pressure rollers (25) and the first guide roller (26) are fixedly installed on the same fixed base (27). The fixed base (27) is detachably installed on the inner bottom wall of the horizontal box (3). The first guide roller (26) is located directly below the steering roller (21). The two pressure rollers (25) are symmetrically arranged on both sides of the first guide roller (26). The cable (6) passes through the steering roller (21), winds around the first guide roller (26), and then passes between the two pressure rollers (25).

7. A device for detecting exposed wire damage based on conductive liquid according to claim 1, characterized in that, The second extension component (9) includes two symmetrically arranged second fixed pulleys (28) and a second movable pulley (29) located between the two second fixed pulleys (28). After passing through the auxiliary component (7), the cable (6) is wound around the second fixed pulley (28) and the second movable pulley (29) in the horizontal direction. The second movable pulley (29) can reciprocate in the horizontal direction to adjust the degree of bending of the cable (6).

8. A device for detecting exposed wire damage based on conductive liquid according to claim 7, characterized in that, The inner bottom wall of the horizontal box (3) is fixedly connected to a second base (30), and both second fixed pulleys (28) can be detachably installed on the second base (30); A second guide rail (32) is fixedly installed on the inner bottom wall of the horizontal box (3). A second guide seat (31) is slidably installed on the second guide rail (32). A second movable pulley (29) is detachably installed on the second guide seat (31). A second screw (33) is rotatably installed on the second guide rail (32). The second screw (33) passes through the second guide seat (31) and is threadedly connected to the second guide seat (31).

9. A device for detecting exposed wire damage based on conductive liquid according to claim 1, characterized in that, The main guide assembly (5) includes a second guide wheel (34) fixedly installed on the side wall of the horizontal box (3), a cleaning component (36) set in the outlet (35), and a cable feeder (37) symmetrically arranged in the traction box (2). The cable (6) passes through the second extension assembly (9), wraps around the second guide wheel (34), passes through the cleaning component (36), and enters the traction box (2). The cable (6) passes through the two cable feeders (37) and extends out of the traction box (2). Each wire feeder (37) includes an annular belt (38) and two rubber wire feeders (39). The two rubber wire feeders (39) are rotatably mounted on the partition (40) inside the traction box (2). The annular belt (38) is wound around the two rubber wire feeders (39). In the upper wire feeding belt (37), a first gear (41) and a second motor (42) are fixedly installed at both ends of the axle of one of the rubber wire feeding wheels (39). In the lower wire feeding belt (37), a second gear (43) is fixedly installed at one end of the axle of one of the rubber wire feeding wheels (39). The first gear (41) and the second gear (43) are meshed. Two symmetrically arranged guide plates (44) are provided between the two wire conveyors (37). Telescopic rods (45) are fixedly installed on the opposite sides of the two guide plates (44), and one end of the telescopic rods (45) is fixedly installed on the partition plate (40).

10. A device for detecting exposed wire damage based on conductive liquid according to claim 1, characterized in that, The detection assembly includes a detector (46) and a probe (47) electrically connected to the detector (46). The detector (46) is installed on the outside of the housing (1), and the probe (47) is inserted into the conductive liquid in the horizontal housing (3) and the vertical housing (4), respectively.

11. A detection method for detecting damage defects in cables, characterized in that, The exposed wire damage detection device based on conductive liquid as described in claim 10 is used, and the detection method includes the following steps: Step 1: Adjust the first extension component (8) and the second extension component (9) according to the diameter of the cable (6) to be tested, so as to preset the required degree of bending of the cable (6) in the vertical and horizontal directions; Step 2: Insert one end of the cable (6) into the vertical box (4) through the inlet (17) of the box (1), then wrap it in an S-shape on the first extension component (8) in the vertical direction, then pass it around the auxiliary guide component (7) and enter the horizontal box (3), then wrap it in an S-shape on the second extension component (9) in the horizontal direction, then insert it into the main guide component (5), and finally extend it from the tail of the traction box (2); Step 3: Add conductive liquid to the horizontal box (3) and the vertical box (4) respectively; and connect the terminal wire of the detector (46) to the end of the cable (6); Step 4: Start the main guide assembly (5) and the auxiliary guide assembly (7) to make the cable (6) pass through the vertical box (4) and the horizontal box (3) at a constant speed. During the journey, the cable (6) achieves multi-directional bending in the vertical direction through the first extension assembly (8) in the vertical box (4) and multi-directional bending in the horizontal direction through the second extension assembly (9) in the horizontal box (3). Step 5: The probe (47) monitors the changes in the electrical properties of the liquid in real time. When the damaged part of the cable (6) is exposed in a certain box, the corresponding detector (46) issues an alarm signal.

12. The detection method according to claim 11, characterized in that, The conductive liquid contains suspended micro-powder that can be attracted by a magnetic field. When the cable (6) is damaged and the core is exposed, the inner core of the cable, the damaged and exposed core part, the conductive liquid, the probe (47) and the detector (46) form a closed detection circuit and generate a working current. The damaged and exposed core part forms a local ring-shaped induction magnetic field based on the working current. The micro powder in the conductive liquid is adsorbed by the local ring-shaped induction magnetic field and accumulates in the damaged gap. When only the outer sheath of the cable (6) is damaged, when the cable (6) is bent through the first extension component (8) and the second extension component (9), the gap in the outer sheath at the damaged point opens, and the micro powder flows to the damaged opening along with the conductive liquid. After the cable (6) passes through the second extension assembly (9), the damaged insulation layer closes, trapping the micropowder at the damaged core. Then, the cable (6) is tested by electromagnetic flaw detection equipment. Based on the distribution location and range of the micro powder, the cable (6) is judged to be damaged, whether the core is missing or the outer sheath is damaged, and the degree of damage.

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