A movable high-sensitivity cable defect detection device

Abstract

The present invention discloses a movable high-sensitivity cable defect detection device, comprising a shell, a ditch for dodge cables is provided at the bottom of the shell, a positioning slot is provided upwardly in the middle of the ditch, driving wheels are connected to the four corners of the bottom of the shell located outside the ditch, and a battery for supplying power to the driving wheels is connected to the rear end of the shell. The present invention relates to the field of cable detection technology. The movable high-sensitivity cable defect detection device can sensitively detect the defect position of the cable through the detection component, and after the defect position is detected, the driving component is stimulated so that the marking component leaves a mark at the defect position of the cable, so that the maintenance personnel can quickly locate the defect position when repairing the cable, thereby shortening the maintenance time and improving the maintenance efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to a movable high-sensitivity cable defect detection device. Background Art

[0002] Cable defect detection is an important part of ensuring the safe and reliable operation of the power system. The reliability of the power system is crucial to ensuring the continuity of power supply. Regular cable defect detection can ensure that the cable is in good condition during operation, and timely discover and repair defects, which helps maintain the overall stability and reliability of the power system. This is of great significance to ensuring the safety of users' electricity use and the stability of power supply.

[0003] In the prior art, cable trays are used to protect cables. However, the existence of cable trays will make the cable detection environment narrow, which will increase the difficulty of cable defect detection. In addition, the laying length of cables is usually long, and the narrow space will affect the movement of detection instruments, making the cable defect detection more difficult and affecting the cable detection efficiency.

[0004] Therefore, those skilled in the art provide a movable high-sensitivity cable defect detection device to solve the problems raised in the above background technology. Summary of the invention

[0005] The object of the present invention is to provide a movable high-sensitivity cable defect detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A movable high-sensitivity cable defect detection device comprises a shell, a ditch for dodge cables is provided at the bottom of the shell, a positioning slot is provided in the middle of the ditch upwards, driving wheels are connected to the four corners of the bottom of the shell located outside the ditch, and a battery for powering the driving wheels is connected to the rear end of the shell;

[0009] The detection component includes a magnetic cutting conductor and an electromagnetic coil. The front end of the shell is fixedly connected with the magnetic cutting conductor, which is arranged obliquely above the avoidance groove. The electromagnetic coil is fixedly connected above the magnetic cutting conductor in the shell. The two sides of the top of the magnetic cutting conductor are respectively provided with poles, and the tops of the two poles are connected to the two ends of the electromagnetic coil through wires.

[0010] The marking component comprises a pen cover and a marking pen, wherein the pen cover is slidably arranged in the positioning groove, and the marking pen is plugged into the bottom of the pen cover;

[0011] A driving component includes a first magnet, a second magnet and a connecting rod. A slide groove is provided above the electromagnetic coil and the pen cover in the shell. The first magnet and the second magnet are slidably connected in the two slide grooves respectively. The tops of the two slide grooves are connected through a connecting rod groove. A connecting rod is rotatably connected in the connecting rod groove through a rotating shaft. The tops of the first magnet and the second magnet are fixedly connected with hanging points, and the two hanging points are respectively connected to the two ends of the connecting rod.

[0012] Furthermore, a rebound groove is provided on the inner wall of the positioning groove, a magnetic ring is slidably connected in the rebound groove, the magnetic ring is fixed to the top of the pen cover, a spring is fixedly connected between the bottom of the magnetic ring and the rebound groove, and the free length of the spring is less than the depth of the rebound groove.

[0013] Furthermore, the marking component also includes a warning unit, which is mainly composed of a metal cover, a slider and a striker. The avoidance groove is located between the positioning groove and the detection component and is provided with a circular groove vertically upward. A striker groove is provided on a side of the circular groove close to the positioning groove. A metal cover is fixedly connected in the circular groove, a slider is slidably connected in the striker groove, a side of the slider close to the metal cover is connected to the striker, and a positioning block in contact with the magnetic ring is fixedly connected on a side of the slider close to the pen cover.

[0014] Furthermore, the slider is composed of a horizontal section and a vertical section. The horizontal section is arranged on the side of the vertical section away from the metal cover, so that the slider is in an inverted L shape. A through groove connected to the sliding groove is opened on the side of the top of the impact groove close to the second magnet, and the horizontal section is slidably arranged in the through groove.

[0015] Furthermore, a cavity is formed in both the horizontal section and the vertical section, and the two cavities are assembled into an L-shaped cavity. A piston is slidably arranged in the cavity in the horizontal section, and the striker is inserted into the cavity of the vertical section on the side away from the metal cover.

[0016] Furthermore, the top and bottom of the positioning block are processed with smooth transition guide surfaces, and a space for accommodating the magnetic ring is reserved between the top of the positioning block and the top of the positioning groove.

[0017] Furthermore, the rotating shaft is arranged on a side of the connecting rod close to the first magnet, so that the force arm on the side of the rotating shaft close to the second magnet is greater than the force arm on the side of the rotating shaft close to the first magnet.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] 1. This kind of mobile high-sensitivity cable defect detection device can sensitively detect the defect position of the cable through the detection component, and after the defect position is detected, the driving component is stimulated to make the marking component leave a mark at the defect position of the cable, so that the maintenance personnel can quickly locate the defect position when repairing the cable, thereby shortening the maintenance time and improving the maintenance efficiency;

[0020] 2. This kind of movable high-sensitivity cable defect detection device can issue an alarm after detecting the defective area of ​​the cable through the set alarm unit, which is used to prompt the defective location of the cable, and can further reduce the time spent on locating the defective area of ​​the cable, thereby further improving the cable maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a movable high-sensitivity cable defect detection device of the present invention.

[0023] Figure 2 It is a schematic diagram of the bottom structure of a movable high-sensitivity cable defect detection device of the present invention.

[0024] Figure 3 It is a structural schematic diagram of a detection component in a movable high-sensitivity cable defect detection device of the present invention.

[0025] Figure 4 It is a structural schematic diagram of a marking component in a movable high-sensitivity cable defect detection device of the present invention.

[0026] Figure 5 It is a schematic diagram of the state of a driving component in a movable high-sensitivity cable defect detection device of the present invention when it is in operation.

[0027] Figure 6 It is a schematic diagram of the internal structure of a slider in a movable high-sensitivity cable defect detection device of the present invention.

[0028] Figure 7 It is a schematic diagram of the state of a slider in a movable high-sensitivity cable defect detection device of the present invention after colliding with a metal cover.

[0029] In the figure, 1. shell; 2. detection component; 21. magnetic conductor; 22. electromagnetic coil; 3. marking component; 31. pen cover; 32. marking pen; 33. warning unit; 331. metal cover; 332. slider; 3321. horizontal section; 3322. vertical section; 333. striker; 334. positioning block; 4. driving component; 41. first magnet; 42. second magnet; 43. connecting rod; 5. avoidance groove; 6. positioning groove; 7. driving wheel; 8. battery; 9. pole; 10. slide groove; 11. connecting rod groove; 12. hanging point; 13. rebound groove; 14. magnetic ring; 15. spring; 16. circular groove; 17. impact groove; 18. through groove; 19. cavity; 20. piston. DETAILED DESCRIPTION

[0030] The present invention is further described below with reference to the accompanying drawings and specific embodiments: Example

[0031] Reference Figure 1 - Figure 7 The present invention discloses a movable high-sensitivity cable defect detection device, comprising a housing 1, a ditch 5 for ditching cables is provided at the bottom of the housing 1, a positioning slot 6 is provided in the middle of the ditch 5, and driving wheels 7 are connected to the four corners of the bottom of the housing 1 at the outside of the ditch 5, and a battery 8 for supplying power to the driving wheels 7 is connected to the rear end of the housing 1;

[0032] The detection component 2 includes a magnetic conductor 21 and an electromagnetic coil 22. The front end of the housing 1 is fixedly connected with the magnetic conductor 21, which is arranged obliquely above the avoidance groove 5. The electromagnetic coil 22 is fixedly connected above the magnetic conductor 21 in the housing 1. The two sides of the top of the magnetic conductor 21 are respectively provided with poles 9, and the tops of the two poles 9 are connected to the two ends of the electromagnetic coil 22 through wires.

[0033] The marking assembly 3 includes a pen cover 31 and a marking pen 32. The pen cover 31 is slidably disposed in the positioning groove 6, and the marking pen 32 is inserted into the bottom of the pen cover 31;

[0034] The driving component 4 includes a first magnet 41, a second magnet 42 and a connecting rod 43. A slide groove 10 is opened above the electromagnetic coil 22 and the pen cover 31 in the shell 1. The first magnet 41 and the second magnet 42 are slidingly connected in the two slide grooves 10 respectively. The tops of the two slide grooves 10 are connected through a connecting rod groove 11. The connecting rod 43 is rotatably connected in the connecting rod groove 11 through a rotating shaft. The tops of the first magnet 41 and the second magnet 42 are fixedly connected with hanging points 12, and the two hanging points 12 are respectively connected to the two ends of the connecting rod 43.

[0035] In this embodiment, observe Figure 1 and Figure 2It can be found that an avoidance groove 5 is provided at the bottom of the shell 1, so that when the shell 1 is placed in the cable tray, the avoidance groove 5 can accommodate the cable, and then driving wheels 7 are provided at the four corners of the bottom of the shell 1, and a battery 8 is connected to the top rear end of the shell 1 to power the driving wheel 7, so that the driving wheel 7 can move the shell 1 in the cable tray, which is convenient for detecting different parts of the cable and improving the detection efficiency of the cable. Figure 4 and Figure 5 It can be found that a mounting groove is provided at the top rear end of the housing 1, which can facilitate the installation and replacement of the battery 8 and reduce the maintenance difficulty of the detection device.

[0036] Since a cable that is energized will inevitably generate a magnetic field around it, the shape of its magnetic flux lines is a closed concentric circle with the conductor as the center, and the direction of the magnetic field is perpendicular to the direction of the current. When defects appear in the cable, such as cracks in the insulation layer, air gaps or water trees, the electric and magnetic field distribution inside the cable will change. This is because defects will change the electrical properties of the cable, thereby affecting the flow of current and the distribution of the magnetic field. For example, an insulation crack may cause the local electric field to increase, thereby affecting the surrounding magnetic field strength and distribution. Therefore, observation Figure 3 It can be found that a magnetic cutting conductor 21 capable of cutting magnetic flux lines is fixedly connected to the front end of the shell 1, an electromagnetic coil 22 is fixedly connected above the magnetic cutting conductor 21 in the shell 1, and poles 9 are respectively provided on both sides of the top of the magnetic cutting conductor 21. The tops of the two poles 9 are connected to the two ends of the electromagnetic coil 22 through wires, so that when the shell 1 moves forward in the cable tray, the magnetic cutting conductor 21 cuts the magnetic flux lines of the cable to generate current, and then the current is transmitted to the electromagnetic coil 22 through the poles 9 and the wires to generate magnetic force.

[0037] Look again Figure 4A positioning groove 6 is opened upward in the middle of the avoidance groove 5, a pen cover 31 is slidably connected in the positioning groove 6, a marking pen 32 is inserted at the bottom of the pen cover 31, and a slide groove 10 is opened above the positioning groove 6. A second magnet 42 is slidably arranged in the slide groove 10, so that the second magnet 42 can adsorb the pen cover 31 to the top of the positioning groove 6 to prevent the marking pen 32 from contacting the surface of the cable and leaving a mark. Subsequently, a slide groove 10 is also opened above the electromagnetic coil 22, and a first magnet 41 is slidably arranged in the slide groove 10, a connecting rod groove 11 is opened between the two slide grooves 10, and a connecting rod 43 is rotatably connected in the connecting rod groove 11 through a rotating shaft, and the tops of the first magnet 41 and the second magnet 42 are fixedly connected with a hanging point 12, so that the two hanging points 12 are connected to the two ends of the connecting rod 43. At this time, when the detection device moves to the part where the cable has defects, the magnetic lines of force cut by the magnetic conductor 21 are enhanced, and the induced current generated is increased, so the suction force of the electromagnetic coil 22 is enhanced. At this time, the first magnet 41 is attracted and moved downward by the electromagnetic coil 22, and the first magnet 41 presses down the connecting rod 43, so that the second magnet 42 is tilted up under the action of the lever, resulting in an increase in the distance between the second magnet 42 and the pen cover 31, so that the pen cover 31 cannot be sucked, and the pen cover 31 will fall under the action of gravity, so that the marking pen 32 leaves a mark on the surface of the cable, thereby accurately locating the defect position and improving the maintenance efficiency of the cable.

[0038] Finally, when the detection device moves out of the defective area, the magnetic force of the electromagnetic coil 22 weakens, reducing the suction force exerted by the electromagnetic coil 22 on the first magnet 41. At this time, the first magnet 41 can no longer pry the second magnet 42. Under the action of gravity, the second magnet 42 moves down close to the pen cover 31, thereby re-sucking up the pen cover 31, separating the marking pen 32 from the cable, avoiding further leaving marks, and further improving the accuracy of marking.

[0039] In a further preferred embodiment of the present invention, Figure 4 As shown, a rebound groove 13 is provided on the inner wall of the positioning groove 6, a magnetic ring 14 is slidably connected in the rebound groove 13, the magnetic ring 14 is fixed on the top of the pen cover 31, a spring 15 is fixedly connected between the bottom of the magnetic ring 14 and the rebound groove 13, and the free length of the spring 15 is less than the depth of the rebound groove 13.

[0040] In this embodiment, since the pen cap 31 will fall down after the second magnet 42 is tilted, the distance between the second magnet 42 and the pen cap 31 is still large after the second magnet 42 is reset, which affects the adsorption of the pen cap 31. Figure 4It can be found that a rebound groove 13 is opened on the inner wall of the positioning groove 6, and a magnetic ring 14 is slidably connected in the rebound groove 13. The magnetic ring 14 is fixed to the top of the pen cover 31, and a spring 15 is fixedly connected between the bottom of the magnetic ring 14 and the rebound groove 13. The spring 15 can be used to provide support for the pen cover 31, shorten the distance between the pen cover 31 and the second magnet 42, thereby ensuring that the second magnet 42 can stably absorb the pen cover 31.

[0041] By making the free length of the spring 15 smaller than the depth of the rebound groove 13, the spring 15 can be in a stretched state after the pen cover 31 is adsorbed, so that after the pen cover 31 is separated from the second magnet 42, a force is applied to the pen cover 31 through the spring 15, thereby increasing the initial velocity of the pen cover 31 sliding out of the positioning groove 6, so that the marking pen 32 can leave a mark more timely, thereby shortening the offset error of the mark and further improving the positioning accuracy of the defective position of the cable.

[0042] In a further preferred embodiment of the present invention, Figure 5 and Figure 6 As shown, the marking component 3 also includes a warning unit 33, which is mainly composed of a metal cover 331, a slider 332 and a striker 333. The avoidance groove 5 is located between the positioning groove 6 and the detection component 2 and is provided with a circular groove 16 vertically upward. A striker groove 17 is provided on the side of the circular groove 16 close to the positioning groove 6. A metal cover 331 is fixedly connected in the circular groove 16, and a slider 332 is slidably connected in the striker groove 17. A striker 333 is connected to the side of the slider 332 close to the metal cover 331, and a positioning block 334 in contact with the magnetic ring 14 is fixedly connected to the side of the slider 332 close to the pen cover 31;

[0043] The top and bottom of the positioning block 334 are both processed with smooth transition guide surfaces, and a space for accommodating the magnetic ring 14 is reserved between the top of the positioning block 334 and the top of the positioning groove 6 .

[0044] In this embodiment, since the detection device moves in the cable tray, the mark cannot be directly observed when it is generated, resulting in the need to inspect the cable from beginning to end during maintenance, which increases the time consumption of cable maintenance.

[0045] So look Figure 5It can be found that a circular groove 16 is vertically opened at the position of the avoidance groove 5 between the positioning groove 6 and the detection component 2, and a striking groove 17 is opened on the side of the circular groove 16 close to the positioning groove 6, a metal cover 331 is fixedly connected in the circular groove 16, a slider 332 is slidably connected in the striking groove 17, a striker 333 is connected to the side of the slider 332 close to the metal cover 331, and a positioning block 334 in contact with the magnetic ring 14 is fixedly connected to the side of the slider 332 close to the pen cover 31, so that when the pen cover 31 pops out of the positioning groove 6, the magnetic ring 14 squeezes the positioning block 334, and the positioning block 334 pushes the slider 332 to slide in the striking groove 17, so that the striker 333 on the slider 332 strikes the metal cover 331, causing the metal cover 331 to produce a crisp sound, which is used to prompt the approximate location of the defect, thereby effectively shortening the defect positioning time and improving the cable maintenance efficiency.

[0046] By machining smooth transition guide surfaces on the top and bottom of the positioning block 334, and leaving space between the top of the positioning block 334 and the top of the positioning groove 6 for accommodating the magnetic ring 14, a lateral force that pushes the slider 332 to slide can be applied to the positioning block 334 when the magnetic ring 14 moves up and down, thereby preventing the positioning block 334 from blocking the magnetic ring 14 from sliding in the rebound groove 13.

[0047] In a further preferred embodiment of the present invention, Figure 5 and Figure 6 As shown, the slider 332 is composed of a horizontal section 3321 and a vertical section 3322. The horizontal section 3321 is arranged on a side of the vertical section 3322 away from the metal cover 331, so that the slider 332 is in an inverted L shape. A through groove 18 connected to the slide groove 10 is opened on the top of the impact groove 17 near the second magnet 42, and the horizontal section 3321 is slidably arranged in the through groove 18.

[0048] The horizontal section 3321 and the vertical section 3322 are both provided with a cavity 19, and the two cavities 19 are assembled into an L-shaped cavity. A piston 20 is slidably arranged in the cavity 19 in the horizontal section 3321, and the striker 333 is inserted into the cavity 19 of the vertical section 3322 on the side away from the metal cover 331.

[0049] In this embodiment, the slider 332 is composed of a horizontal section 3321 and a vertical section 3322, and the horizontal section 3321 is arranged on the side of the vertical section 3322 away from the metal cover 331, so that the slider 332 is in an inverted L shape, and a through groove 18 connected to the slide groove 10 is opened on the side of the top of the impact groove 17 close to the second magnet 42. The horizontal section 3321 is slidably arranged in the through groove 18, so that when the second magnet 42 absorbs the pen cover 31, it can also absorb the horizontal section 3321, so that the slider 332 is always kept close to the pen cover 31 by the suction force of the second magnet 42. At this time, when the driving wheel 7 is pressed by foreign objects in the cable tray and bumps, the magnetic ring 14 will be unable to move downward under the support of the positioning block 334, thereby preventing the pen cover 31 from separating from the second magnet 42 and avoiding marking errors.

[0050] Then, when the second magnet 42 moves upward, the suction force on the horizontal section 3321 disappears, so when the magnetic ring 14 moves downward, it can squeeze the positioning block 334 to make the slider 332 slide in the impact groove 17, thereby further improving the marking accuracy without affecting the operation of the marking component 3.

[0051] A cavity 19 is provided in both the horizontal section 3321 and the vertical section 3322. The two cavities 19 are assembled into an L-shaped cavity. A piston 20 is slidably provided in the cavity 19 in the horizontal section 3321. The side of the striker 333 away from the metal cover 331 is inserted into the cavity 19 of the vertical section 3322, so that the slider 332 can slide in the impact groove 17. After the striker 333 hits the metal cover 331 and the slider 332 stops, the piston 20 slides in the cavity 19 under the action of inertia, so that the gas in the cavity 19 is pressurized. Then the pressurized air pushes the striker 333 to slide, and the length of the striker 333 extending out of the vertical section 3322 is increased, thereby pushing the slider 332 back and reducing the distance between the horizontal section 3321 and the second magnet 42 to ensure that the slider 332 can be sucked back normally when the second magnet 42 falls.

[0052] After the slider 332 is sucked back, the slider 332 will slide in the impact groove 17 until the slider 332 stops contacting the side wall of the impact groove 17. The piston 20 will continue to slide due to inertia, thereby stretching the cavity 19 to suck and reset the striker 333, so that the striker 333 will not loosen when it contacts the metal cover 331 next time, to ensure that the metal cover 331 can stably emit a crisp sound.

[0053] In a further preferred embodiment of the present invention, Figure 4 As shown, the rotating shaft is arranged on the side of the connecting rod 43 close to the first magnet 41 , so that the force arm on the side of the rotating shaft close to the second magnet 42 is greater than the force arm on the side of the rotating shaft close to the first magnet 41 .

[0054] In this embodiment, by setting the rotating shaft on the side of the connecting rod 43 close to the first magnet 41, the force arm on the side of the rotating shaft close to the second magnet 42 is made greater than the force arm on the side of the rotating shaft close to the first magnet 41, the second magnet 42 can easily lift the first magnet 41 under the action of gravity, so that after the detection device is moved out of the defective area of ​​the cable, the second magnet 42 can be reset under the action of gravity to ensure the stable operation of the detection device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile high-sensitivity cable defect detection device, characterized in that: The invention comprises a housing (1), wherein a ditch (5) for ditching cables is provided at the bottom of the housing (1), a positioning groove (6) is provided in the middle of the ditch (5) extending upward, driving wheels (7) are connected to the four corners of the bottom of the housing (1) located outside the ditch (5), and a storage battery (8) for supplying power to the driving wheels (7) is connected to the rear end of the housing (1); A detection component (2) comprises a tangential magnetic conductor (21) and an electromagnetic coil (22); the front end of the housing (1) is fixedly connected to the tangential magnetic conductor (21); the tangential magnetic conductor (21) is arranged obliquely above the avoidance groove (5); the electromagnetic coil (22) is fixedly connected above the tangential magnetic conductor (21) in the housing (1); poles (9) are respectively arranged on both sides of the top of the tangential magnetic conductor (21); the tops of the two poles (9) are connected to the two ends of the electromagnetic coil (22) via wires; A marking assembly (3), comprising a pen cover (31) and a marking pen (32), wherein the pen cover (31) is slidably disposed in the positioning groove (6), and the marking pen (32) is plugged into the bottom of the pen cover (31); A driving assembly (4) comprises a first magnet (41), a second magnet (42) and a connecting rod (43); a slide groove (10) is provided above the electromagnetic coil (22) and the pen cover (31) in the housing (1); the first magnet (41) and the second magnet (42) are slidably connected in the two slide grooves (10), respectively; the tops of the two slide grooves (10) are connected via a connecting rod groove (11); the connecting rod (43) is rotatably connected in the connecting rod groove (11) via a rotating shaft; the tops of the first magnet (41) and the second magnet (42) are fixedly connected to hanging points (12); the two hanging points (12) are respectively connected to the two ends of the connecting rod (43).

2. A movable high-sensitivity cable defect detection device according to claim 1, characterized in that: The inner wall of the positioning groove (6) is provided with a rebound groove (13), a magnetic ring (14) is slidably connected in the rebound groove (13), the magnetic ring (14) is fixed to the top of the pen cover (31), a spring (15) is fixedly connected between the bottom of the magnetic ring (14) and the rebound groove (13), and the free length of the spring (15) is less than the depth of the rebound groove (13).

3. A movable high-sensitivity cable defect detection device according to claim 2, characterized in that: The marking assembly (3) further comprises a warning unit (33), the warning unit (33) mainly comprising a metal cover (331), a slider (332) and a striker (333); the avoidance groove (5) is provided with a circular groove (16) vertically upward at a position between the positioning groove (6) and the detection assembly (2); a striker groove (17) is provided on a side of the circular groove (16) close to the positioning groove (6); the metal cover (331) is fixedly connected in the circular groove (16); the slider (332) is slidably connected in the striker groove (17); the striker (333) is connected on a side of the slider (332) close to the metal cover (331); and a positioning block (334) in contact with the magnetic ring (14) is fixedly connected on a side of the slider (332) close to the pen cover (31).

4. A movable high-sensitivity cable defect detection device according to claim 3, characterized in that: The slider (332) is composed of a horizontal section (3321) and a vertical section (3322); the horizontal section (3321) is arranged on a side of the vertical section (3322) away from the metal cover (331), so that the slider (332) is in an inverted L shape; a through groove (18) connected to the slide groove (10) is provided on a side of the top of the impact groove (17) close to the second magnet (42); and the horizontal section (3321) is slidably arranged in the through groove (18).

5. A movable high-sensitivity cable defect detection device according to claim 4, characterized in that: The horizontal section (3321) and the vertical section (3322) are provided with a cavity (19) together, and the two cavities (19) are assembled into an L-shaped cavity. A piston (20) is slidably arranged in the cavity (19) in the horizontal section (3321), and the striker (333) is inserted into the cavity (19) of the vertical section (3322) at a side away from the metal cover (331).

6. A movable high-sensitivity cable defect detection device according to claim 5, characterized in that: The top and bottom of the positioning block (334) are both processed with smooth guide surfaces, and a space for accommodating the magnetic ring (14) is reserved between the top of the positioning block (334) and the top of the positioning groove (6).

7. A movable high-sensitivity cable defect detection device according to claim 1, characterized in that: The rotating shaft is arranged on a side of the connecting rod (43) close to the first magnet (41), so that the force arm on the side of the rotating shaft close to the second magnet (42) is greater than the force arm on the side of the rotating shaft close to the first magnet (41).

Images