A cable piercing device

Abstract

The present invention provides a cable piercing device, belonging to the technical field of cable detection, comprising a cage-type frame structure for being inserted into a cable, the frame structure having two end ring parts and a connecting part between the two end ring parts; wherein the end ring part has a roller radially cantilevered inward, and when the roller is driven, it is used to slide with the cable so that the cage-type frame structure moves along the cable; a piercing device is used to be arranged on the connecting part, and the piercing device has a retractable piercing needle and a grounding cable for connecting to a ground; the present invention cooperates with a magnum wheel and a movable rolling ball to enable the device to move or rotate along the axis or circumferential surface of the cable, thereby improving the flexibility of the device; and a rack slide rail can adjust the positions of the driving wheel and the movable rolling ball according to the diameter of the cable to be tested, thereby completing the fixation of the device and improving the adaptability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of cable detection, and in particular to a cable piercing device. Background Art

[0002] The cable operation and maintenance department needs to conduct a piercing test before processing the high-voltage cable to ensure that the cable being repaired is not energized. With the advancement of science and technology, the high-voltage cable piercing devices currently used have also been greatly optimized, but there are still some shortcomings. Most high-voltage cable piercing devices need to be installed and positioned before work, and the installation structure is complex. In addition, the detection and piercing efficiency is low, and the piercing accuracy is low. For example, a high-voltage cable piercing device and a piercing method are disclosed in a Chinese patent with an authorization announcement number of CN104701782B. The cable is fixed with a mechanical structure such as a bolt and then the piercing work is performed, thereby ensuring the safety of the user. However, the device needs to adjust the bolts for manual position adjustment every time it is detected, and it is difficult to detect in places that are not conducive to manual detection, such as high altitude or narrow places. The present invention is to provide a cable piercing device to solve the problems raised by the above-mentioned background technology. Summary of the invention

[0003] In view of this, the present invention provides a cable piercing device, which not only solves the problems of angle adjustment and position movement during the piercing process, but also realizes detection in high altitude or narrow places that are not conducive to manual detection, further improving safety and convenience.

[0004] In order to solve the above technical problems, the present invention provides a cable piercing device, comprising:

[0005] A cage-type frame structure for passing through a cable, the frame structure having two end rings and a connecting portion between the two end rings; wherein the end ring has a roller radially cantilevered inward, and when the roller is driven, it is used to slide with the cable to enable the cage-type frame structure to move along the cable;

[0006] The pricking device is used to be arranged at the connecting part, and has a retractable pricking needle and a grounding cable for connecting to the ground.

[0007] The telescopic mechanism of the pricking needle head comprises a screw motor fixedly mounted on the connecting part, the screw motor is internally threadedly connected with a pricking screw, and an insulating sleeve is fixedly connected to the bottom of the pricking screw.

[0008] For armored cables, the telescopic mechanism can use a hydraulic telescopic rod. The force provided by the hydraulic pressure is relatively greater, which is convenient for piercing some armored cables.

[0009] By adopting the above technical solution, the puncture mechanism can be moved on the cable under test, which is suitable for application in high altitude or some environments that are difficult to operate manually, thereby improving safety.

[0010] Furthermore, the end ring portion comprises:

[0011] The first ring frame, the second ring frame and the third ring frame, the two ends of the first ring frame are rotatably connected with the second ring frame and the third ring frame through joint shafts respectively, the adjacent ends of the second ring frame and the third ring frame are fixedly installed with locking plates, the two locking plates and the positions of the second ring frame, the third ring frame corresponding to the locking plates are provided with through holes, and locking pins are movably connected in the through holes.

[0012] A pin spring is sleeved on the lock pin, one end of the pin spring is fixedly connected to the lock pin, and the other end of the pin spring is fixedly connected to the second ring frame or the third ring frame.

[0013] By adopting the above technical solution, the present invention can be conveniently sleeved on the cable to be tested. During operation, the locking pin is pulled out (the pin spring is in a stretched state at this time) to open the opening between the second ring frame and the third ring frame, and then the device is sleeved on the cable to be tested. After the second ring frame and the third ring frame are combined, the locking pin is released, the pin spring is reset and contracted, and the second ring frame and the third ring frame are locked, which is convenient to operate.

[0014] Furthermore, it also includes a driving device for driving the roller to rotate.

[0015] By adopting the above technical solution, the flexibility of the present invention is improved. The driving device is a driving servo motor, and the roller is a Mecanum wheel, so that the device can move or rotate along the cable axis or circumferential surface.

[0016] Furthermore, the end ring portion is also provided with a sliding connection piece for slidingly cooperating with the cable.

[0017] The sliding connection piece consists of a ball buckle and a movable ball, and the movable ball is connected by rolling on the ball clamping block.

[0018] By adopting the above technical solution, the sliding connector cooperates with the Mecanum wheel, so that the device can move better on the cable under test.

[0019] The sliding connection members and the rollers are evenly arranged in the circumferential direction.

[0020] Furthermore, the sliding connection member and the roller are also connected with a radial adjustment device for adjusting the inward overhang length of the roller or the sliding connection member.

[0021] By adopting the above technical solution, the adaptability of the device is improved, and the radial adjustment device closely fits the outer surface of the measured cable by adjusting the overhang length of the sliding connection and the roller, thereby ensuring the normal movement of the equipment.

[0022] Furthermore, the radial adjustment device comprises a fixed slide rail fixed to the end ring portion and a rack slide rail slidably connected to the fixed slide rail, and an adjustment gear meshing with the rack slide rail is rotatably connected to the frame structure;

[0023] One of the rack slide rails is fixedly connected to the ball buckle;

[0024] The other two rack slides are fixedly connected to the spring frame through a first preload spring, a roller is rotatably connected to the spring frame, the roller includes a driving wheel, a first roller flange is fixedly mounted on the driving wheel, a first movable roller is rotatably connected between the first roller flanges, a driving servo motor is fixedly mounted on the side of the spring frame, and an output shaft of the driving servo motor is fixedly connected to the driving wheel.

[0025] A transmission rod is rotatably connected to the frame structure, and transmission gears are fixedly connected to both ends of the transmission rod. The transmission gears and the adjustment gears are meshed with each other. A transmission servo motor fixedly connected to the frame structure is also provided on the side of the transmission rod, and the output shaft of the transmission servo motor is fixedly connected to the transmission rod.

[0026] By adopting the above technical solution, the synchronization and stability are good.

[0027] Furthermore, it also includes a winding device, which is used to wind the grounding cable; wherein the winding device includes a winding frame fixed on the connecting part, and the winding frame is rotatably connected to a transmission shaft, the transmission shaft is a metal shaft, the other end of the puncture needle is connected to a metal ring through a wire, the metal ring is sleeved on the transmission shaft, the metal ring is rotatably connected to the transmission shaft, and a winding wheel for winding the grounding cable is fixedly connected to the transmission shaft, one end of the grounding cable passes through the winding wheel and contacts and fits with the transmission shaft to achieve the purpose of conductivity.

[0028] By adopting the above technical solution, the grounding cable is wound on the winding wheel, which is conducive to long-distance detection.

[0029] Furthermore, a preload shaft is fixedly connected to one side of the winding frame, a movable frame is rotatably connected to the preload shaft, a driven shaft is rotatably connected to the other end of the movable frame, a driven wheel is fixedly mounted on the driven shaft, a first pulley is fixedly connected to the transmission shaft, a second pulley is fixedly connected to the driven shaft, and a transmission belt is wound around the first pulley and the second pulley.

[0030] By adopting the above technical solution, it is beneficial to cable recovery. When the device moves forward along the cable axis, the movable frame is rotated to make the driven wheel fit with the cable under test, so that as the device moves, the driven wheel also rotates, and the second pulley drives the first pulley to rotate through the transmission belt, and then drives the winding wheel to rotate to release the grounding cable. When the device moves in the reverse direction, the above components rotate in the reverse direction. As a result, the winding wheel winds the grounding cable on

[0031] Furthermore, second roller flanges are evenly distributed on the circumferential surface of the driven wheel, second movable rollers are arranged between the second roller flanges, and the second rollers are rotatably connected to the second roller flanges via roller shafts.

[0032] By adopting the above technical solution, when the device rotates along the circumferential surface of the cable, the second movable roller can rotate on the cable surface, turning it into rolling friction, thereby reducing the resistance during rotation.

[0033] Furthermore, inductance coils for sensing whether current exists are fixedly installed on both sides of the cage-type frame structure, and the connection of the inductance coils is a snap-on connection. The inductance coils are electrically connected to a main box installed on the connection part.

[0034] By adopting the above technical solution, the inductor coil is used to sense whether there is current in the cable. When the inductor coil senses that there is current in the cable, the part is punctured to eliminate the current, thereby improving work efficiency.

[0035] The beneficial effects of the above technical solution of the present invention are as follows:

[0036] When in use, the lock pin is pulled out (the first preload spring is in a stretched state at this time), the opening between the second ring frame and the third ring frame can be opened, and the interface of the inductor coil is also separated, and then the device is put on the cable to be tested. After the second ring frame and the third ring frame are combined, the lock pin is released, the first preload spring is reset and contracted, the second ring frame and the third ring frame are locked, and the inductor coil is closed and connected;

[0037] Insert the grounding plug deep into the ground in a safe area, start the main box, and the transmission servo motor drives the adjustment gear to rotate. After a number of adjustment gears are engaged and transmitted, the rack slide rail is driven, so that the rack slide rail can move and retract, and the driving wheel and the movable ball move closer to the center of the frame structure until the driving wheel and the movable ball fit tightly with the cable under test;

[0038] Mecanum wheels are installed on the two rack rails and driven by two servo motors respectively, so that the device can move or rotate along the cable axis or circumferential surface, which improves the flexibility of the device.

[0039] Under the action of the second preload spring torque, the movable frame makes the driven wheel fit closely with the cable, so that as the device moves, the driven wheel also rotates, and the second pulley drives the first pulley to rotate through the transmission belt, thereby driving the winding wheel to rotate to release the grounding cable;

[0040] The device enters the cruising state. When the two inductance coils detect current fluctuations, under the control of the main box, the device retreats half of its entire length, the movement of the device temporarily stops, the screw motor starts, and the piercing screw moves along its own axis toward the cable, so that the needle on its end face pierces the cable. If the cable here has an electric charge, the charge can enter the grounding cable along the needle and flow through the grounding plug, and finally flow to the earth. After two or three seconds, the main box controls the screw motor to rotate in the opposite direction, so that the piercing screw retracts and the needle is pulled out. Then the two pairs of driving servo motors at both ends of the device rotate in the opposite direction, and the device begins to rotate along the circumferential surface of the cable, and stops after adjusting the angle. The degree of rotation can be determined according to the number of cables inside the cable. The screw motor is started again to repeat the above process, and the discharge process is finally realized.

[0041] After the detection is completed, the device moves in the reverse direction along the cable under test, and the driven wheel also rotates in the reverse direction, and drives the winding wheel through the transmission belt to wind the grounding cable onto the winding wheel.

[0042] The present invention cooperates with the magnum wheel and the movable ball so that the device can move or rotate along the cable axis or circumferential surface, thereby improving the flexibility of the device; and the rack slide rail can adjust the positions of the driving wheel and the movable ball according to the diameter of the measured cable to complete the fixation of the device, thereby improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A three-dimensional diagram of the cable piercing device of the present invention;

[0044] Figure 2 It is a structural schematic diagram of the frame structure of the cable piercing device of the present invention;

[0045] Figure 3 It is a structural schematic diagram of the driving device of the cable piercing device of the present invention;

[0046] Figure 4 It is a structural schematic diagram of a winding device of a cable piercing device of the present invention;

[0047] Figure 5 for Figure 3 A magnified view of part A;

[0048] Figure 6 for Figure 3 A magnified view of part B;

[0049] Figure 7 for Figure 3 Enlarged view of part C.

[0050] 1. Frame structure; 2. Radial adjustment device; 3. Piercing device; 4. Winding device; 101. Joint shaft; 102. Fixed slide rail; 103. Connecting part; 104. Main chassis; 105. Inductor; 106. Lock pin; 107. Pin spring; 108. Locking plate; 109. First ring frame; 110. Second ring frame; 111. Third ring frame; 201. Rack slide rail; 202. Adjusting gear; 203. Transmission servo motor; 204. Roller buckle; 205. Movable roller; 206. Driving servo motor; 207. First roller flange; 208. First movable roller; 209. Spring frame; 210. Driving wheel; 211. First preload spring; 212. Transmission rod; 213. Transmission gear; 301. Barbed screw; 302. Screw motor; 303. Needle; 304. Grounding cable; 305. Grounding plug; 306. Second preload spring; 307. Preload shaft; 308. Insulating sleeve; 309. Winding frame; 401. Winding wheel; 402. First pulley; 403. Transmission shaft; 404. Transmission belt; 405. Movable frame; 406. Second pulley; 407. Driven wheel; 408. Second roller flange; 409. Second movable roller; 410. Roller shaft; 411. Driven shaft. DETAILED DESCRIPTION

[0051] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will be combined with the appended drawings of the embodiments of the present invention. Figure 1-7 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0052] Example 1

[0053] like Figure 1-7 Shown: A cable piercing device, comprising:

[0054] A cage-type frame structure 1 for passing through a cable, the frame structure 1 having two end rings and a connecting portion 103 between the two end rings; wherein the end rings have rollers radially cantilevered inward, and when the rollers are driven, they are used to slide with the cable so that the cage-type frame structure 1 moves along the cable;

[0055] The pricking device 3 is used to be arranged at the connecting portion 103, and has a retractable pricking needle 303 and a grounding cable 304 for connecting to the ground.

[0056] The telescopic mechanism of the pricking needle 303 comprises a lead screw motor 302 fixedly mounted on the connecting portion 103, the lead screw motor 302 is internally threadedly connected to the pricking lead screw 301, and an insulating sleeve 308 is fixedly connected to the bottom of the lead screw.

[0057] For armored cables, the telescopic mechanism can use a hydraulic telescopic rod. The force provided by the hydraulic pressure is relatively greater, which is convenient for piercing some armored cables.

[0058] By adopting the above technical solution, the puncture mechanism can be moved on the cable under test, which is suitable for application in high altitude or some environments that are difficult to operate manually, thereby improving safety.

[0059] The end ring part includes:

[0060] The first ring frame 109, the second ring frame 110 and the third ring frame 111, both ends of the first ring frame 109 are rotatably connected with the second ring frame 110 and the third ring frame 111 through the joint shaft 101, and the adjacent ends of the second ring frame 110 and the third ring frame 111 are fixedly installed with locking plates 108, and the two locking plates 108 and the positions of the second ring frame 110, the third ring frame 111 corresponding to the locking plates 108 are provided with through holes, and locking pins 106 are movably connected in the through holes.

[0061] A pin spring 107 is sleeved on the lock pin 106 . One end of the pin spring 107 is fixedly connected to the lock pin 106 , and the other end of the pin spring 107 is fixedly connected to the second ring frame 110 or the third ring frame 111 .

[0062] By adopting the above technical solution, the present invention can be conveniently sleeved on the cable to be tested. During operation, the locking pin 106 is pulled out (the pin spring 107 is in a stretched state at this time), and the opening between the second ring frame 110 and the third ring frame 111 can be opened. Then the device is sleeved on the cable to be tested. After the second ring frame 110 and the third ring frame 111 are combined, the locking pin 106 is released, the pin spring 107 is reset and contracted, and the second ring frame 110 and the third ring frame 111 are locked, which is convenient to operate.

[0063] The utility model also comprises a driving device for driving the roller to rotate.

[0064] By adopting the above technical solution, the flexibility of the present invention is improved. The driving device is a driving servo motor 206, and the roller is a Mecanum wheel, so that the device can move or rotate along the cable axis or circumferential surface.

[0065] The end ring portion is also provided with a sliding connection piece for slidingly cooperating with the cable.

[0066] The sliding connection piece is composed of a ball buckle 204 and a movable ball 205, and the movable ball 205 is rollingly connected to the ball buckle.

[0067] By adopting the above technical solution, the sliding connector cooperates with the Mecanum wheel, so that the device can move better on the cable under test.

[0068] The sliding connection parts and the rollers are evenly arranged in the circumferential direction.

[0069] The sliding connection and the roller are also connected with a radial adjustment device 2 for adjusting the inward overhanging length of the roller or the sliding connection.

[0070] By adopting the above technical solution, the adaptability of the device is improved. The radial adjustment device 2 closely fits the outer surface of the cable under test by adjusting the overhang length of the sliding connector and the roller, thereby ensuring the normal movement of the equipment.

[0071] The radial adjustment device 2 includes a fixed slide rail 102 fixed to the end ring portion and a rack slide rail 201 slidably connected to the fixed slide rail 102, and an adjustment gear 202 meshing with the rack slide rail 201 is rotatably connected to the frame structure 1;

[0072] One of the rack slide rails 201 is fixedly connected to the ball buckle 204;

[0073] The other two rack slide rails 201 are fixedly connected to the spring frame 209 through the first preload spring 211. A roller is rotatably connected to the spring frame 209. The roller includes a driving wheel 210. A first roller flange 207 is fixedly installed on the driving wheel 210. A first movable roller 208 is rotatably connected between the first roller flanges 207. A driving servo motor 206 is fixedly installed on the side of the spring frame 209. The output shaft of the driving servo motor 206 is fixedly connected to the driving wheel 210.

[0074] A transmission rod 212 is rotatably connected to the frame structure 1, and transmission gears 213 are fixedly connected to both ends of the transmission rod 212. The transmission gear 213 is meshed with the adjustment gear 202. A transmission servo motor 203 fixedly connected to the frame structure 1 is also provided on the side of the transmission rod 212, and the output shaft of the transmission servo motor 203 is fixedly connected to the transmission rod 212.

[0075] By adopting the above technical solution, the synchronization and stability are good.

[0076] It also includes a winding device 4, which is used to wind the grounding cable 304; wherein the winding device includes a winding frame 309 fixed on the connecting portion 103, and the winding frame 309 is rotatably connected to a transmission shaft 403, the transmission shaft 403 is a metal shaft, the other end of the puncture needle 303 is connected to a metal ring through a wire, the metal ring is sleeved on the transmission shaft 403, the metal ring is rotatably connected to the transmission shaft 403, and a winding wheel 401 for winding the grounding cable 304 is fixedly connected to the transmission shaft 403, one end of the grounding cable 304 passes through the winding wheel 401 and contacts and fits with the transmission shaft 403 to achieve the purpose of conductivity.

[0077] By adopting the above technical solution, the grounding cable 304 is wound on the winding wheel 401, which is beneficial to long-distance detection.

[0078] A preload shaft 307 is fixedly connected to one side of the winding frame 309, and a movable frame 405 is rotatably connected to the preload shaft 307. The other end of the movable frame 405 is rotatably connected to a driven shaft 411, and a driven wheel 407 is fixedly installed on the driven shaft 411. A first pulley 402 is fixedly connected to the transmission shaft 403, and a second pulley 406 is fixedly connected to the driven shaft 411. A transmission belt 404 is wound around the first pulley 402 and the second pulley 406.

[0079] By adopting the above technical solution, it is beneficial to cable recovery. When the device moves in the forward direction along the cable axis, the movable frame 405 is rotated to make the driven wheel 407 fit with the measured cable. As the device moves, the driven wheel 407 also rotates. The second pulley 406 drives the first pulley 402 to rotate through the transmission belt 404, and then drives the winding wheel 401 to rotate to release the grounding cable 304. When the device moves in the reverse direction, the above components rotate in the reverse direction. As a result, the winding wheel 401 winds the grounding cable 304 around the grounding cable 304.

[0080] Second roller flanges 408 are evenly distributed on the circumferential surface of the driven wheel 407 , second movable rollers 409 are arranged between the second roller flanges 408 , and the second rollers are rotatably connected to the second roller flanges 408 via roller shafts 410 .

[0081] By adopting the above technical solution, when the device rotates along the circumferential surface of the cable, the second movable roller 409 can rotate on the surface of the cable, turning it into rolling friction, thereby reducing the resistance during rotation.

[0082] Example 2

[0083] like Figure 1-7 As shown: The difference between this embodiment and embodiment 1 is that the inductor 105 is fixedly installed on both sides of the first ring frame 109 and the second ring frame 110, and the connection of the inductor 105 is a snap-on connection. The inductor 105 is electrically connected to the main box 104 installed on the frame structure 1. In addition to the PLC controller, the main box 104 is also provided with a battery for power supply.

[0084] Example 3

[0085] like Figure 1-7 As shown: the difference between this embodiment and embodiment 2 is that the inductor 105 is not installed on the frame structure 1, and the servo motor 206 and the screw motor 302 and other components are controlled by the PLC controller in the main box 104 to perform pricking at regular intervals.

[0086] Working method (or working principle) of the present invention:

[0087] When in use, the lock pin 106 is pulled out (at this time, the pin spring 107 is in a stretched state), the opening between the second ring frame 110 and the third ring frame 111 can be opened, and the interface of the inductor 105 is also separated, and then the device is put on the cable to be tested, and after the second ring frame 110 and the third ring frame 111 are combined, the lock pin 106 is released, the first preload spring 211 is reset and contracted, and the second ring frame 110 and the third ring frame 111 are locked, and the inductor 105 is closed and connected;

[0088] The grounding plug 305 is inserted deep into the ground in a safe area, the main box 104 is started, and the transmission servo motor 203 drives the adjusting gear 202 to rotate, and the rack slide rail 201 is driven after a plurality of adjusting gears 202 are meshed and transmitted, so that the rack slide rail 201 can move and retract, so that the driving wheel 210 and the movable ball 205 are moved closer to the center of the frame structure 1, until the driving wheel 210 and the movable ball 205 are tightly fitted with the cable under test;

[0089] The two rack rails 201 are both equipped with Mecanum wheels, which are driven by two driving servo motors 206 respectively, so that the device can move or rotate along the cable axis or circumferential surface, thereby improving the flexibility of the device;

[0090] Under the action of the torque of the second preload spring 306, the movable frame 405 makes the driven wheel 407 fit closely with the cable, so that as the device moves, the driven wheel 407 also rotates, and the second pulley 406 drives the first pulley 402 to rotate through the transmission belt 404, thereby driving the winding wheel 401 to rotate to release the grounding cable 304;

[0091] The device enters the cruising state. When the two inductance coils 105 detect current fluctuations, under the control of the main box 104, the device retreats half of its entire length, the movement of the device temporarily stops, the screw motor 302 starts, and the piercing screw 301 moves along its own axis toward the cable, so that the needle 303 on its end face pierces the cable. If the cable here has an electric charge, the electric charge can enter the grounding cable 304 along the needle 303 and flow through the grounding plug 305, and finally flow to the earth. After two or three seconds, the main box 104 controls the screw motor 302 to rotate in the opposite direction, so that the piercing screw 301 retracts and the needle 303 is pulled out. Then the two pairs of driving servo motors 206 at both ends of the device rotate in the opposite direction, and the device begins to rotate along the circumferential surface of the cable, and stops after adjusting the angle. The degree of rotation can be determined according to the number of cables inside the cable. The screw motor 302 is started again to repeat the above process, and the discharge process is finally realized.

[0092] After the detection is completed, the device moves in the reverse direction along the cable under test, and the driven wheel 407 also rotates in the reverse direction, and drives the winding wheel 401 through the transmission belt 404 to wind the grounding cable 304 onto the winding wheel 401 .

[0093] The present invention cooperates with the Magnum wheel and the movable ball 205 so that the device can move or rotate along the cable axis or circumferential surface, thereby improving the flexibility of the device; and the rack slide rail 201 can adjust the positions of the driving wheel 210 and the movable ball 205 according to the diameter of the measured cable to complete the fixation of the device, thereby improving the adaptability of the device.

[0094] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0095] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A cable piercing tool, characterized in that: include: A frame structure (1) for being passed through a cable, the frame structure (1) comprising two end rings and a connecting portion (103) between the two end rings; wherein the end rings have rollers radially cantilevered inwards, and when the rollers are driven, they are used to slide with the cable so that the frame structure (1) moves along the cable; A pricking device (3), arranged at the connecting portion (103), comprising a retractable pricking needle (303) and a grounding cable (304) for grounding; The end ring portion comprises: A first ring frame (109), a second ring frame (110) and a third ring frame (111), wherein two ends of the first ring frame (109) are rotatably connected to the second ring frame (110) and the third ring frame (111) respectively through a joint shaft (101), and a locking plate (108) is fixedly installed at one adjacent end of the second ring frame (110) and the third ring frame (111), and through holes are provided at positions of the two locking plates (108) and the second ring frame (110), the third ring frame (111) corresponding to the locking plates (108), and a locking pin (106) is movably connected in the through hole; Also includes a driving device for driving the roller to rotate; The end ring portion is also provided with a sliding connection piece for slidingly cooperating with the cable; The sliding connection member and the roller are also connected to a radial adjustment device (2) for adjusting the inward overhang length of the roller or the sliding connection member; The radial adjustment device (2) comprises a fixed slide rail (102) fixed to the end ring portion and a rack slide rail (201) slidably connected to the fixed slide rail (102); an adjustment gear (202) meshing with the rack slide rail (201) is rotatably connected to the frame structure (1); A transmission rod (212) is rotatably connected to the frame structure (1), and transmission gears (213) are fixedly connected to both ends of the transmission rod (212). The transmission gear (213) and the adjustment gear (202) are meshed with each other. A transmission servo motor (203) fixedly connected to the frame structure (1) is also provided on the side of the transmission rod (212), and an output shaft of the transmission servo motor (203) is fixedly connected to the transmission rod (212).

2. The cable piercing tool according to claim 1, characterized in that: It also comprises a winding device (4) for winding the grounding cable (304); wherein the winding device comprises a winding frame (309) fixed on the connecting portion (103), a transmission shaft (403) being rotatably connected to the winding frame (309), and a winding wheel (401) for winding the grounding cable (304) being fixedly connected to the transmission shaft (403).

3. The cable piercing tool according to claim 2, characterized in that: A preload shaft (307) is fixedly connected to one side of the winding frame (309), a movable frame (405) is rotatably connected to the preload shaft (307), a driven shaft (411) is rotatably connected to the other end of the movable frame (405), a driven wheel (407) is fixedly mounted on the driven shaft (411), a first pulley (402) is fixedly connected to the transmission shaft (403), a second pulley (406) is fixedly connected to the driven shaft (411), and a transmission belt (404) is wound between the first pulley (402) and the second pulley (406).

4. The cable piercing tool according to claim 3, characterized in that: Second roller flanges (408) are evenly distributed on the circumferential surface of the driven wheel (407), second movable rollers (409) are arranged between the second roller flanges (408), and the second movable rollers (409) are rotatably connected to the second roller flanges (408) via roller shafts (410).

5. The cable piercing tool according to claim 4, characterized in that: Inductance coils (105) for sensing whether current exists are fixedly mounted on both sides of the frame structure (1), respectively; the inductance coils (105) pass through the connection portion (103); the connection between the inductance coils (105) and the connection portion (103) is a snap-on connection; the inductance coils (105) are electrically connected to a mainframe box (104) mounted on the connection portion (103).

Images