Clamping device for cable strength detection

Abstract

The invention relates to the field of cable detection, and discloses a cable strength detection clamping appliance which comprises a supporting frame, a first hydraulic rod is arranged on the supporting frame, a first gear is installed on the outer wall of the first hydraulic rod, a first clamping device is arranged on the supporting frame, and a rotation following device is arranged at the bottom end of the first hydraulic rod. A second clamping device is arranged in the rotary following device, a first cable used for clamping is arranged on the first clamping device and the second clamping device, and a torsion locking device is connected to the first clamping device and the second clamping device; according to the invention, the outer wall of the first cable and a metal wire on the first cable can be clamped through a clamping block arranged on a transmission part in the first clamping device, so that the stress condition of the outer wall of the first cable and the stress condition of the metal wire in the first cable can be detected; and the plurality of circular ring sliding blocks and the circular ring bulges are clamped with the outer wall of the first cable and the metal wire, so that the clamping area is increased, and errors caused by deformation of the first cable are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and more specifically, to a clamping device for detecting cable strength. Background Art

[0002] With the development of the power grid, electricity is being used more and more, and the use of cables is also gradually increasing. Since cables need to adapt to different working environments, their strength needs to be tested after production, mainly including voltage resistance testing, mechanical performance testing and aging testing.

[0003] The mechanical property test of the cable mainly tests its tensile strength, compression strength and impact strength. Generally, the mechanical property test is carried out by setting a clamp on the hydraulic press and clamping the cable with the clamp for strength test, so as to detect the strength of the cable. However, when the cable is clamped by the clamp, the force-bearing area of ​​the clamp is small, and the outer skin of the cable is easily torn during the test, and the tensile condition inside the cable cannot be tested. The metal wire inside the cable can only be subjected to separate tensile and torsion tests, which is more troublesome. Summary of the invention

[0004] The present invention provides a clamping device for cable strength testing, which solves the technical problem in the related art that when the clamp clamps a power cable of 10kV or above, the outer skin of the cable is easily torn during testing due to the small force-bearing area of ​​the cable clamped by the clamp, and the tensile condition inside the cable cannot be detected, while the metal wire inside the cable can only be subjected to separate tensile and twisting testing.

[0005] The present invention provides a clamping device for cable strength detection, comprising a support frame, a first hydraulic rod is arranged on the support frame, a first gear is installed on the outer wall of the first hydraulic rod, a first clamping device is arranged on the support frame, a rotation following device is arranged at the bottom end of the first hydraulic rod, a second clamping device is arranged inside the rotation following device, a first cable for clamping is arranged on the first clamping device and the second clamping device, a torsion locking device is connected to the first clamping device and the second clamping device, and when the first cable is twisted, the torsion locking device enables the first clamping device and the second clamping device to further tighten the first cable step clamping; the first clamping device includes a transmission member, a limit member, a clamping block, and a tightening member. The transmission member is arranged at the center of the support frame. Two clamping blocks are arranged on the transmission member. The two clamping blocks clamp the outer wall and the metal wire of the cable respectively. The limit member and the tightening member are connected to the clamping block. The limit member is used to drive the clamping block to clamp the cable when the transmission member rises. The tightening member is used to drive the torsion locking device to rotate when the rotation following device rotates to prevent the cable and the clamping block from being displaced; the second clamping device and the first clamping device are used to clamp the two ends of the cable, and the tension and torsion detection are performed by contracting and rotating the first hydraulic rod away from each other.

[0006] As a further optimization scheme of the present invention, the transmission member includes a second hydraulic rod fixedly mounted on the support frame, a lifting frame is fixedly mounted on the top of the second hydraulic rod, a lifting block is fixedly mounted on the top of the lifting frame, a first locking block and a second locking block are arranged on the lifting block, clamping blocks are arranged inside the first locking block and the second locking block, the clamping block inside the first locking block is used to clamp the metal wire of the cable, and the clamping block inside the second locking block is used to clamp the outer wall of the cable.

[0007] As a further optimization scheme of the present invention, the limiting member includes a limiting ring rotatably mounted on the support frame and concentric with the first locking block, and a fixed column is provided in a circular array at the top end of the limiting ring. The fixed column is connected to the clamping block and is used to limit the clamping block when the first locking block is raised or lowered.

[0008] As a further optimization scheme of the present invention, the clamping block includes a plurality of annular sliders sliding inside the first locking block and the second locking block, the lifting blocks contact each other to form a circular ring, and an annular protrusion is provided on the annular slider. When the first locking block and the second locking block rise, the annular protrusion drives the annular slider and the annular protrusion to approach the center of the support frame for clamping cables and metal wires.

[0009] As a further optimization scheme of the present invention, the tightening member includes a first tightening column fixedly installed on the top of the clamping block inside the first locking block, a tightening ring is slidably installed on the top of the first tightening column, a tightening groove is arranged inside the tightening ring to engage with the tightening ring, tightening grooves are arranged on the top and bottom of the tightening ring, a second tightening column is slidably arranged inside the tightening groove at the top, the top of the second tightening column is connected to the clamping block inside the second locking block, and the second tightening column and the first tightening column are staggered.

[0010] As a further optimization scheme of the present invention, the first clamping device includes a barrier member arranged on the outer wall of the fixed column, the barrier member includes a fixed block fixedly installed on the outer wall of the fixed column, a first spring is fixedly connected to the fixed block, a barrier block is fixedly installed on the end of the first spring, and the barrier block is used to limit the bottom and top ends of the cable metal wire.

[0011] As a further optimization scheme of the present invention, the torsional locking device includes an I-shaped fixing plate fixedly mounted on the support frame, a second gear and a third gear are rotatably mounted on the I-shaped fixing plate, the second gear is fixedly mounted on the outer wall of the tightening ring, the third gear is meshed with the second gear, a second spring is fixedly mounted on the top of the third gear, a telescopic rod is fixedly mounted on the top of the second spring, and the outer wall of the telescopic rod is provided with a third gear meshed with the second clamping device.

[0012] As a further optimization scheme of the present invention, the rotation following device includes a following block fixedly installed on the bottom end of the first hydraulic rod, a rotating ring is rotatably installed on the bottom end of the following block, a limiting column is fixedly installed on the bottom end of the rotating ring, a limiting block is fixedly installed on the bottom end of the limiting column, and the interior of the limiting block is rotatably connected to the top end of the telescopic rod for limiting the telescopic rod.

[0013] As a further optimization solution of the present invention, the second clamping device is symmetrically arranged with the first clamping device, and the second clamping device is installed inside the follower block, and the rotation of the follower block is used to drive the second clamping device to rotate synchronously.

[0014] As a further optimization solution of the present invention, the first hydraulic rod is kept concentric with the follower block and the limit ring.

[0015] The beneficial effects of the present invention are: The present invention discloses a clamping device for detecting the strength of a cable. A clamping block is arranged on a transmission member inside a first clamping device, which can clamp the outer wall of a first cable and a metal wire on the first cable, thereby improving the detection of stress conditions on the outer wall of the first cable and stress conditions on the metal wire inside the first cable. A plurality of annular sliders and annular protrusions clamp the outer wall and the metal wire of the first cable, thereby increasing the clamping area and reducing errors caused by deformation of the first cable. At the same time, a torsion locking device is connected to the first clamping device and the second clamping device. When the first cable is twisted, the first cable is further clamped at the same time to prevent the first cable from being offset from the clamping block when twisted. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the appearance installation diagram of the clamping device of the present invention; Figure 2 is a separation diagram of the clamping device of the present invention; Figure 3 is a comprehensive diagram of the clamping device of the present invention; Figure 4 is an internal structural diagram of the first clamping device of the present invention; Figure 5 It is the internal structure diagram of the tightening member of the present invention; Figure 6 It is the internal structure diagram of the transmission member of the present invention; Figure 7 It is a connection diagram of the rotation following device and the torsion locking device of the present invention.

[0017] In the figure: 1. Support frame; 11. First gear; 12. First hydraulic rod; 13. First cable; 2. First clamping device; 21. Transmission member; 211. Second hydraulic rod; 212. Lifting frame; 213. Lifting block; 214. First locking block; 215. Second locking block; 22. Limiting member; 221. Limiting ring; 222. Fixed column; 23. Clamping block; 231. Ring slider; 232. Ring protrusion; 24. Tightening member; 241. First tightening column; 242. Tightening ring; 243. Tightening groove; 244. Second tightening column; 25. Blocking member; 251. Fixed block; 252. Blocking block; 253. First spring; 3. Twist-locking device; 31. Second gear; 32. I-shaped fixing plate; 33. Third gear; 34. Second spring; 35. Telescopic rod; 4. Second clamping device; 5. Rotational following device; 51. Following block; 52. Rotational ring; 53. Limiting column; 54. Limiting block. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0019] like Figure 1 to Figure 2 As shown, a clamping device for cable strength detection according to an embodiment of the present invention comprises a support frame 1, a first hydraulic rod 12 is arranged on the support frame 1, a first gear 11 is installed on the outer wall of the first hydraulic rod 12, a first clamping device 2 is arranged on the support frame 1, a rotation following device 5 is arranged at the bottom end of the first hydraulic rod 12, a second clamping device 4 is arranged inside the rotation following device 5, a first cable 13 for clamping is arranged on the first clamping device 2 and the second clamping device 4, a torsion locking device 3 is connected to the first clamping device 2 and the second clamping device 4, and when the first cable 13 is twisted, the torsion locking device 3 enables the first clamping device 2 and the second clamping device 4 to further clamp the first cable 13; like Figure 3 to Figure 4 As shown, the first clamping device 2 includes a transmission member 21, a limit member 22, a clamping block 23, and a tightening member 24. The transmission member 21 is arranged at the center of the support frame 1. Two clamping blocks 23 are arranged on the transmission member 21. The two clamping blocks 23 clamp the outer wall and the metal wire of the cable respectively. The limit member 22 and the tightening member 24 are connected to the clamping block 23. The limit member 22 is used to drive the clamping block 23 to clamp the cable when the transmission member 21 rises. The tightening member 24 is used to drive the torsion locking device 3 to rotate when the rotation following device 5 rotates to prevent the cable and the clamping block 23 from being displaced; the second clamping device 4 and the first clamping device 2 are used to clamp the two ends of the cable, and the tension and torsion detection are performed by contracting and rotating the first hydraulic rod 12 away from each other.

[0020] It should be noted that when the cable is clamped for testing, it is generally clamped by two plates, and then the two clamps are moved away from each other by a hydraulic press for tension testing. However, during the testing process, the metal wire of the cable cannot be clamped, so only the outer sheath of the cable can be pulled, and the metal wire cannot be tested. When testing the metal wire, the metal wire is usually pulled out separately for testing, resulting in inaccurate test data. In order to solve this problem, the following improvements have been made: The cable is preliminarily processed, and the outer wall of the cable sheath and the inner metal wire is removed to obtain Figure 1The shape of the first cable 13 in the support frame 1 is formed by starting the first hydraulic rod 12 to extend it to the maximum length, and then the first cable 13 is placed on the first clamping device 2 and the second clamping device 4 inside the support frame 1, and the hydraulic rod is started to drive the transmission member 21 to rise, and the rising of the transmission member 21 drives the two clamping blocks 23 to clamp the outer wall of the first cable 13 and the metal wire on the first cable 13, so as to clamp the outer wall of the first cable 13 and the metal wire, thereby reducing the problem that the stretching of the metal wire inside the first cable 13 is not easy to detect during the stretching and twisting process of the metal wire. After the clamping is complete, the first hydraulic rod 12 is started to contract, and the first hydraulic rod 12 drives the rotating follower The following device 5 and the second clamping device 4 approach the top of the supporting frame 1, so as to detect the first cable 13, and the first gear 11 is driven to rotate by the motor, and the rotating following device 5 drives the second clamping device 4 to rotate, and the second clamping device 4 is connected to the first clamping device 2 through the torsion locking device 3. When the first cable 13 is twisted, the first cable 13 can be further clamped to prevent the first cable 13 from offsetting with the clamping block 23 when twisted, thereby achieving the purpose of twisting detection of the first cable 13, and the clamping block 23 can fully clamp the outer wall and metal wire of the first cable 13, thereby increasing the clamping area and improving the accuracy of detection.

[0021] like Figure 3 to Figure 4 As shown, the transmission member 21 includes a second hydraulic rod 211 fixedly mounted on the support frame 1, a lifting frame 212 is fixedly mounted on the top of the second hydraulic rod 211, a lifting block 213 is fixedly mounted on the top of the lifting frame 212, a first locking block 214 and a second locking block 215 are arranged on the lifting block 213, a clamping block 23 is arranged inside the first locking block 214 and the second locking block 215, the clamping block 23 inside the first locking block 214 is used to clamp the metal wire of the cable, and the clamping block 23 inside the second locking block 215 is used to clamp the outer wall of the cable.

[0022] It should be noted that a clamping block 23 is provided inside the lifting block 213 and the second locking block 215. When the first cable 13 is placed on the first clamping device 2, the outer wall of the first cable 13 and the metal wire on the first cable 13 can be clamped to achieve the effect of classified clamping and increase the clamping area, thereby improving the accuracy of detection.

[0023] like Figures 4 to 5 As shown, the limiting member 22 includes a limiting ring 221 rotatably mounted on the support frame 1 and concentric with the first locking block 214, and a fixing column 222 is provided in a circular array at the top end of the limiting ring 221. The fixing column 222 is connected to the clamping block 23 and is used to limit the clamping block 23 when the first locking block 214 is raised or lowered.

[0024] like Figure 5As shown, the clamping block 23 includes a plurality of annular sliders 231 sliding inside the first locking block 214 and the second locking block 215, the lifting blocks 213 contact each other to form a circular ring, and an annular protrusion 232 is provided on the annular slider 231. When the first locking block 214 and the second locking block 215 rise, the annular protrusion 232 drives the annular slider 231 and the annular protrusion 232 to approach the center of the support frame 1 for clamping cables and metal wires.

[0025] It should be noted that when the lifting blocks 213 contact each other to form a circle, the circular protrusion 232 drives the circular slider 231 and the circular protrusion 232 to approach the center of the support frame 1 when the first locking block 214 and the second locking block 215 rise, so as to clamp the cables and metal wires.

[0026] like Figure 5 As shown, the tightening member 24 includes a first tightening column 241 fixedly mounted on the top of the clamping block 23 inside the first locking block 214, a tightening ring 242 is slidably mounted on the top of the first tightening column 241, a tightening groove 243 is arranged inside the tightening ring 242 to mesh with the tightening ring 242, tightening grooves 243 are arranged on the top and bottom of the tightening ring 242, a second tightening column 244 is slidably arranged inside the tightening groove 243 at the top, the top of the second tightening column 244 is connected to the clamping block 23 inside the second locking block 215, and the second tightening column 244 is staggered with the first tightening column 241.

[0027] It should be noted that the limit member 22 and the tightening member 24 are connected to the clamp block 23, which can limit the clamp block 23. Therefore, when the first locking block 214 and the second locking block 215 rise, the clamp block 23 can be driven to clamp the outer wall and the metal wire of the first cable 13. The design of the second tightening column 244 and the first tightening column 241 can drive the torsion locking device 3 to rotate when the second clamping device 4 and the rotation following device 5 rotate, thereby driving the tightening ring 242 to rotate, so that the clamp blocks 23 approach each other and further clamp the first cable 13 during rotation, thereby preventing the clamp block 23 and the first cable 13 from being displaced.

[0028] like Figure 6 As shown, the first clamping device 2 includes a barrier member 25 arranged on the outer wall of the fixed column 222, and the barrier member 25 includes a fixed block 251 fixedly installed on the outer wall of the fixed column 222, and a first spring 253 is fixedly connected to the fixed block 251, and a barrier block 252 is fixedly installed on the end of the first spring 253, and the barrier block 252 is used to limit the bottom and top ends of the cable metal wire.

[0029] It should be noted that a blocking block 252 is fixedly installed at the end of the first spring 253 , and the blocking block 252 is used to limit the bottom end and the top end of the cable metal wire when the first cable 13 is installed.

[0030] like Figure 7 As shown, the torsional locking device 3 includes an I-shaped fixing plate 32 fixedly mounted on the support frame 1, and a second gear 31 and a third gear 33 are rotatably mounted on the I-shaped fixing plate 32, the second gear 31 is fixedly mounted on the outer wall of the tightening ring 242, the third gear 33 is meshed with the second gear 31, a second spring 34 is fixedly mounted on the top of the third gear 33, a telescopic rod 35 is fixedly mounted on the top of the second spring 34, and the outer wall of the telescopic rod 35 is provided with a third gear 33 meshed with the second clamping device 4.

[0031] It should be noted that if Figure 7 As shown, the first hydraulic rod 12 is Figure 7 The first clamping device 2 is fixedly mounted on the support frame 1, so when rotating, the second gears 31 on the first clamping device 2 and the second clamping device 4 cooperate with the I-shaped fixing plate 32 and the telescopic rod 35, so that the force directions of the two second gears 31 are the same, thereby achieving the purpose of driving the second gear 31 to rotate, and the direction of rotation of the second gear 31 is to drive the second tightening column 244 on the tightening ring 242 and the first tightening column 241 to move closer to the center of the support frame 1, thereby achieving a further clamping effect.

[0032] like Figure 7 As shown, the rotating following device 5 includes a following block 51 fixedly mounted on the bottom end of the first hydraulic rod 12, a rotating ring 52 is rotatably mounted on the bottom end of the following block 51, a limiting column 53 is fixedly mounted on the bottom end of the rotating ring 52, a limiting block 54 is fixedly mounted on the bottom end of the limiting column 53, the interior of the limiting block 54 is rotatably connected to the top end of the telescopic rod 35, and is used to limit the telescopic rod 35.

[0033] It should be noted that the interior of the limit block 54 is rotatably connected to the top end of the telescopic rod 35, and is used to limit the telescopic rod 35. When the follower block 51 drives the second clamping device 4 to rotate, the rotating ring 52 will not rotate synchronously, and the I-shaped fixing plate 32 is rotatably connected to the third gear 33. The I-shaped fixing plate 32 is fixedly mounted on the support frame 1, thereby driving the telescopic rod 35 to rotate when the follower block 51 rotates. The second spring 34 is provided on the telescopic rod 35 to play a protective role and prevent the telescopic rod 35 from breaking due to excessive rotation.

[0034] like Figure 7As shown, the second clamping device 4 is symmetrically arranged with the first clamping device 2 , and the second clamping device 4 is installed inside the following block 51 , and the following block 51 rotates to drive the second clamping device 4 to rotate synchronously.

[0035] like Figure 7 As shown, the first hydraulic rod 12 is kept concentric with the follower block 51 and the limiting ring 221 .

[0036] It should be noted that the first hydraulic rod 12 is kept concentric with the following block 51 and the limiting ring 221 , so as to improve the clamping accuracy of the first clamping device 2 and the second clamping device 4 .

[0037] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A clamping device for testing cable strength, comprising a support frame (1), characterized in that: The support frame (1) is provided with a first hydraulic rod (12), the outer wall of the first hydraulic rod (12) is installed with a first gear (11), the support frame (1) is provided with a first clamping device (2), the bottom end of the first hydraulic rod (12) is provided with a rotation follower (5), the interior of the rotation follower (5) is provided with a second clamping device (4), the first clamping device (2) and the second clamping device (4) are provided with a first cable (13) for clamping, the first clamping device (2) and the second clamping device (4) are connected with a torsion locking device (3), and when the first cable (13) is twisted, the torsion locking device (3) enables the first clamping device (2) and the second clamping device (4) to further clamp the first cable (13); The first clamping device (2) comprises a transmission member (21), a limiting member (22), a clamping block (23), and a tightening member (24); the transmission member (21) is arranged at the center of the support frame (1); two clamping blocks (23) are arranged on the transmission member (21); the two clamping blocks (23) clamp the outer wall of the cable and the metal wire respectively; the limiting member (22) and the tightening member (24) are connected to the clamping block (23); the limiting member (22) is used to drive the clamping block (23) to clamp the cable when the transmission member (21) rises; the tightening member (24) is used to drive the torsion locking device (3) to rotate when the rotation following device (5) rotates to prevent the cable and the clamping block (23) from being displaced; The second clamping device (4) and the first clamping device (2) are used to clamp the two ends of the cable and to move them away from each other through the contraction and rotation of the first hydraulic rod (12) to perform tension and torsion detection.

2. A clamping device for cable strength testing according to claim 1, characterized in that: The transmission member (21) comprises a second hydraulic rod (211) fixedly mounted on the support frame (1); a lifting frame (212) is fixedly mounted on the top of the second hydraulic rod (211); a lifting block (213) is fixedly mounted on the top of the lifting frame (212); a first locking block (214) and a second locking block (215) are arranged on the lifting block (213); clamping blocks (23) are arranged inside the first locking block (214) and the second locking block (215); the clamping block (23) inside the first locking block (214) is used to clamp the metal wire of the cable; and the clamping block (23) inside the second locking block (215) is used to clamp the outer wall of the cable.

3. A clamping device for testing cable strength according to claim 2, characterized in that: The limiting member (22) comprises a limiting ring (221) rotatably mounted on the support frame (1) and concentric with the first locking block (214); a fixing column (222) is arranged in a circular array at the top end of the limiting ring (221); the fixing column (222) is connected to the clamping block (23) and is used to limit the clamping block (23) when the first locking block (214) is raised or lowered.

4. A clamping device for cable strength testing according to claim 3, characterized in that: The clamping block (23) comprises a plurality of circular sliders (231) sliding inside the first locking block (214) and the second locking block (215); the lifting blocks (213) contact each other to form a circular ring; the circular sliders (231) are provided with circular protrusions (232); when the first locking block (214) and the second locking block (215) rise, the circular protrusions (232) drive the circular sliders (231) and the circular protrusions (232) to approach the center of the support frame (1) for clamping cables and metal wires.

5. A clamping device for testing cable strength according to claim 4, characterized in that: The tightening member (24) comprises a first tightening column (241) fixedly mounted on the top of a clamping block (23) inside the first locking block (214); a tightening ring (242) is slidably mounted on the top of the first tightening column (241); a tightening groove (243) is arranged inside the tightening ring (242) and meshes with the tightening ring (242); tightening grooves (243) are arranged on the top and bottom of the tightening ring (242); a second tightening column (244) is slidably arranged inside the tightening groove (243) at the top; the top of the second tightening column (244) is connected to the clamping block (23) inside the second locking block (215); and the second tightening column (244) and the first tightening column (241) are arranged alternately.

6. A clamping device for testing cable strength according to claim 5, characterized in that: The first clamping device (2) comprises a barrier member (25) arranged on the outer wall of the fixed column (222), the barrier member (25) comprising a fixed block (251) fixedly mounted on the outer wall of the fixed column (222), a first spring (253) being fixedly connected to the fixed block (251), a barrier block (252) being fixedly mounted on the end of the first spring (253), and the barrier block (252) being used to limit the bottom end and the top end of the cable metal wire.

7. A clamping device for testing cable strength according to claim 6, characterized in that: The twist locking device (3) comprises an I-shaped fixing plate (32) fixedly mounted on the support frame (1); a second gear (31) and a third gear (33) are rotatably mounted on the I-shaped fixing plate (32); the second gear (31) is fixedly mounted on the outer wall of the tightening ring (242); the third gear (33) meshes with the second gear (31); a second spring (34) is fixedly mounted on the top end of the third gear (33); a telescopic rod (35) is fixedly mounted on the top end of the second spring (34); and the outer wall of the telescopic rod (35) is provided with a third gear (33) meshing with the second clamping device (4).

8. A clamping device for testing cable strength according to claim 7, characterized in that: The rotary following device (5) comprises a following block (51) fixedly mounted on the bottom end of the first hydraulic rod (12); a rotating ring (52) is rotatably mounted on the bottom end of the following block (51); a limiting column (53) is fixedly mounted on the bottom end of the rotating ring (52); a limiting block (54) is fixedly mounted on the bottom end of the limiting column (53); the interior of the limiting block (54) is rotatably connected to the top end of the telescopic rod (35) for limiting the position of the telescopic rod (35).

9. A clamping device for testing cable strength according to claim 8, characterized in that: The second clamping device (4) is symmetrically arranged with the first clamping device (2); the second clamping device (4) is installed inside the follower block (51); the rotation of the follower block (51) is used to drive the second clamping device (4) to rotate synchronously.

10. A clamping device for testing cable strength according to claim 9, characterized in that: The first hydraulic rod (12) is kept concentric with the follower block (51) and the limiting ring (221).

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