A cable high and low temperature torque test device

Abstract

The present invention relates to the field of cable testing technology, specifically a cable high and low temperature torque test device, including: a pulling and twisting frame, a torque chuck, a hinged torsion assembly and an air cooling assembly, the surface of the pulling and twisting frame is provided with a detection seat and an adjustment slide, the surface of the adjustment slide is slidably mounted with a movable slide, and the inner side of the adjustment slide is provided with a screw shaft for controlling the sliding of the movable slide, and the inner side of the detection seat is provided with a sensor group for detecting the stress state of the surface of the torque chuck. In the present invention, by driving the rotation of the torque chuck and the hinged torsion assembly, the cable is twisted along its length direction, and the dual testing method enables the equipment to comprehensively evaluate the cable under different working conditions, improve the testing efficiency, avoid the trouble of using different equipment for testing separately in the traditional method, and can simulate the complex stress conditions of the cable in actual application that the cable is subjected to axial torsion and bending stress at the same time, so as to more comprehensively evaluate the overall performance of the cable.

Description

Technical Field

[0001] The invention relates to the technical field of cable testing, in particular to a cable high and low temperature torque testing device. Background Art

[0002] In existing cable testing technologies, axial torque testing and bending torque testing are usually required separately. Most traditional cable torque testing equipment can only perform a single type of test, that is, it can only detect the torque characteristics of the cable under axial torsion or bending. This single-function equipment has the problems of complex testing process and low efficiency, especially when it is necessary to conduct a comprehensive mechanical performance evaluation of the cable under complex working conditions, it often requires reliance on multiple devices or multiple tests to complete. This not only increases the cumbersomeness of the operation, but also leads to inconsistent testing environments due to multiple tests, affecting the accuracy and comparability of the final data.

[0003] In actual use, cables often need to withstand complex mechanical conditions, such as axial torsion and bending torsion at the same time. In high-voltage cables, communication cables, and special cables for industrial use, the cables often produce complex multi-dimensional stress states during use due to changes in the external environment or workload. Single torque or bending mechanical tests can no longer meet the comprehensive evaluation of the overall performance of the cable. The test equipment in the prior art is usually unable to perform comprehensive tests on the axial torsion and bending torsion of the cable at the same time, which makes the durability and reliability evaluation of the cable under complex stress conditions have certain limitations.

[0004] In addition, the existing multiple testing methods increase testing time and cost due to the cumbersome testing process and frequent equipment switching. At the same time, multiple clamping, fixing and adjustment during the operation may also cause unnecessary damage to the cable, affecting the accuracy of the test results.

[0005] In view of this, research and improvement are carried out on the existing problems, and a cable high and low temperature torque test device is provided to solve the current problems. The purpose is to solve the problems and improve the practical value through this technology. Summary of the invention

[0006] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0007] To this end, the technical solution adopted by the present invention is: a cable high and low temperature torque test device, comprising: a pulling and twisting frame, a torque chuck, a hinge and twisting assembly and an air cooling assembly, the surface of the pulling and twisting frame is provided with a detection seat and an adjusting slide, the surface of the adjusting slide is slidably mounted with a movable slide, and the inner side of the adjusting slide is provided with a screw shaft for controlling the sliding of the movable slide, the inner side of the detection seat is provided with a sensor group for detecting the stress state of the torque chuck surface, one side of the pulling and twisting frame is fixedly installed with a reduction transmission box for driving the torque chuck to rotate, the torque chuck and the hinge and twisting assembly are rotatably mounted on the detection seat and the movable slide surface respectively and are located on the same horizontal axis;

[0008] The first and second shafts are connected to each other with a first end, a second end of the first shaft is connected to the first rotating disk, and the second end of the first shaft is connected to the second rotating disk by a rotation of the first and second shafts.

[0009] A protective cover is rotatably installed on the surface of the pulling and twisting frame, and an air cooling component is fixedly installed on the inner side of the pulling and twisting frame. The air cooling component includes a circulating air box and a blowing roller and a heat exchanger located inside the circulating air box. A flow channel is provided on the inner side of the circulating air box, and an air inlet seal and an exhaust hole connected to both ends of the flow channel are provided on the surface of the circulating air box.

[0010] In a preferred example, the present invention can be further configured as follows: the protective cover is a heat-insulating material component, which is used to seal the environment of the top surface component of the tension and torsion frame, and the surface of the protective cover is provided with a transparent window located between the torque clamp and the hinged torsion assembly.

[0011] In a preferred example, the present invention can be further configured as follows: a sensor group is provided inside the detection seat, and the sensor group includes:

[0012] A torque sensor is used to detect the torsional moment generated by the torque chuck during the axial torsion of the cable;

[0013] Deflection force sensor, used to detect the change in torque when the torque clamp is deflected by the cable;

[0014] Stress sensor, used to monitor the stress changes of the cable during the test;

[0015] The output end of the sensor group is electrically connected to the control system for real-time acquisition and processing of torque data of the cable during torsion and bending tests.

[0016] In a preferred example, the present invention can be further configured as follows: the second shaft and the dynamic sleeve are located on the same horizontal axis in the initial state, the transmission gear ring is arranged obliquely, the rotating ball box and the ball cover are semi-spherical shell structures, and the transmission key shaft is located on the axis line of the rotating ball box and the ball cover.

[0017] In a preferred example, the present invention can be further configured as follows: the transmission shaft teeth and the ends of the second shaft rod are both in transmission engagement with the surface of the transmission key shaft, and the transmission of the dynamic sleeve and the second shaft rod is achieved through the transmission key shaft.

[0018] In a preferred example, the present invention can be further configured as follows: a plurality of locking pin rods are provided on the surface of the fixed sleeve and the surface of the first sleeve, the locking pin rods are electric push rod structures and are radially arranged on the surfaces of the fixed sleeve and the first sleeve and facing the surfaces of the first sleeve and the second shaft rod, a plurality of rack keys are provided on the surfaces of the first sleeve and the second shaft rod, and the output end of the locking pin rod is provided with locking teeth abutting against the surfaces of the first sleeve and the second shaft rod.

[0019] Specifically, the locking effect of the second shaft rod and the first shaft sleeve is achieved by the locking effect of the fixed shaft sleeve and the locking pin rod on the surface of the first shaft sleeve, so as to maintain the torsional bending effect of the cable and perform a bending test under a long-term torque retention state.

[0020] In a preferred example, the present invention can be further configured as follows: the heat exchanger includes a fin grid, a refrigeration coil, and an electric heating wire embedded in the inner side of the fin grid; the interior of the refrigeration coil is filled with refrigerant and is connected to a compression refrigeration system.

[0021] In a preferred example, the present invention can be further configured as follows: a temperature sensor is provided inside the protective cover for real-time monitoring of the ambient temperature inside the protective cover, and constant temperature control is achieved through a compression refrigeration system and an electric heating wire electrically connected to the control system;

[0022] Specifically, the compression refrigeration system is used to cool the heat exchanger according to the feedback from the temperature sensor to maintain a constant temperature of the equipment in a low-temperature test environment; the electric heating wire is used to control the heating operation of the heat exchanger according to the feedback signal from the temperature sensor during high-temperature testing to ensure a constant temperature in a high-temperature environment.

[0023] The beneficial effects achieved by the present invention are:

[0024] 1. In the present invention, by driving the torque chuck and the hinge assembly to rotate, the cable is twisted along its length direction. The device can accurately detect the torque change of the cable under the action of this torque and evaluate the torsional resistance of the cable under axial load. In the bending torque test, the device controls the second shaft and the first sleeve in combination with the deflection movement of the dynamic sleeve to make the cable bear torque at the same time in the bending state, thereby testing the mechanical performance of the cable under the combined action of bending load and torque. The dual testing method enables the device to comprehensively evaluate the cable under different working conditions. On the one hand, it improves the test efficiency and avoids the trouble of using different equipment for testing separately in traditional methods; on the other hand, the device can simulate the complex stress conditions of the cable in actual applications where it is subjected to axial torsion and bending stress at the same time, thereby more comprehensively evaluating the overall performance of the cable.

[0025] 2. In the present invention, by manually driving the first turntable and the second turntable to rotate, combined with the composite control of the second shaft and the first sleeve, the axial rotation and deflection movement of the dynamic sleeve are precisely adjusted. This allows the torsional direction and torsional effect of the cable to be flexibly adjusted according to the test requirements, ensuring the accuracy and controllability of the test process.

[0026] 3. In the present invention, the sensor group is used to realize real-time data collection, which can detect the instantaneous torque data generated by the cable during the test. The locking effect of the locking pin rod on the second shaft rod and the first shaft sleeve can maintain the stability of the cable in the torsion and bending state, and realize long-term torque retention test. This design ensures that the mechanical properties of the cable under long-term torsion and bending conditions are fully verified, and effectively improves the reliability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the surface structure of a tension-twist frame according to an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the surface structure of a detection seat according to an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the structure of a hinge assembly according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the exploded structure of a hinge assembly according to an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of an air cooling component according to an embodiment of the present invention;

[0033] Figure 7This is a schematic diagram of the cross-sectional structure of an air cooling component according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] 100, tension and twisting frame; 110, detection seat; 120, reduction transmission box; 130, protective cover; 140, adjustment slide seat; 141, screw shaft; 142, movable slide seat;

[0036] 200, torque chuck;

[0037] 300, hinge assembly; 310, fixed shaft sleeve; 320, shaft box assembly; 330, transmission key shaft; 340, dynamic clamping sleeve; 311, first rotating disk; 312, second rotating disk; 313, locking pin rod; 321, first shaft sleeve; 322, second shaft rod; 323, rotating ball box; 324, ball cover; 325, transmission gear ring; 341, transmission shaft gear;

[0038] 400, air cooling assembly; 410, circulating air box; 420, blast roller; 430, heat exchanger; 411, air inlet seal; 412, exhaust hole. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0040] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0041] A cable high and low temperature torque testing device provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0042] Combination Figure 1-Figure 7 As shown, the present invention provides a cable high and low temperature torque test device, comprising: a tension and torsion rack 100, a torque chuck 200, a hinge and torsion assembly 300 and an air cooling assembly 400. Through the coordinated work of each component, the comprehensive test of the axial torque and bending torque of the cable in a high and low temperature environment can be achieved.

[0043] The tension and torsion frame 100 is the supporting body of the whole device, and a detection seat 110 and an adjustment slide 140 are provided on its surface. The detection seat 110 is used to install the torque chuck 200 and the sensor group, and the sensor group is used to detect the stress state of the cable during the test. The adjustment slide 140 is a sliding seat for installing a movable slide 142, and the movable slide 142 can slide on the surface of the adjustment slide 140 to adjust the distance of the hinge assembly 300 relative to the torque chuck 200, so as to adapt to the test of cables of different lengths. A screw shaft 141 is provided on the inner side of the adjustment slide 140, and the screw shaft 141 is used to control the sliding of the movable slide 142 to ensure that the position of the hinge assembly 300 can be accurately adjusted according to the length of the cable.

[0044] The detection seat 110 is provided with a sensor group inside, and the sensor group includes: a torque sensor, a deflection force sensor and a stress sensor. The torque sensor is used to detect the torsional moment generated by the torque chuck 200 when the cable is axially twisted in real time, the deflection force sensor is used to monitor the deflection moment generated by the cable during the bending process, and the stress sensor is responsible for detecting the stress change of the cable under the stress state. The output end of the sensor group is electrically connected to the control system, and can transmit real-time monitoring data to the control system, thereby realizing accurate mechanical analysis of the cable under different stress conditions.

[0045] A reduction transmission box 120 for driving the torque chuck 200 to rotate is fixedly installed on one side of the tension and torsion frame 100. The reduction transmission box 120 can drive the torque chuck 200 to perform axial torsion, thereby applying torque to one end of the cable fixed thereon. By driving the torque chuck 200 to rotate through the reduction transmission box 120, the cable will be twisted along its length direction, thereby performing an axial torque test.

[0046] The torque chuck 200 and the hinge assembly 300 are rotatably mounted on the surfaces of the detection seat 110 and the movable slide seat 142 respectively, and both are on the same horizontal axis, ensuring that the cable can maintain an accurate force direction during torsion and bending, avoiding test errors caused by uneven force.

[0047] The hinge assembly 300 is a structural assembly for clamping the other end of the cable, and includes a fixed sleeve 310, a shaft box assembly 320, a transmission key shaft 330 and a dynamic clamping sleeve 340. The fixed sleeve 310 is fixed to the inner side of the movable slide 142, and is used to support the rotation structure of the shaft box assembly 320. The shaft box assembly 320 includes a first sleeve 321, a second shaft rod 322, a rotating ball box 323, a ball cover 324 and a transmission gear ring 325. The first sleeve 321 is rotatably sleeved on the inner side of the fixed sleeve 310, and one end is connected to the first rotating disk 311, which is used to control the rotation of the second shaft rod 322 and the dynamic clamping sleeve 340. The second shaft rod 322 is rotatably sleeved on the inner side of the first sleeve 321, and one end passes through the first rotating disk 311 and is connected to the second rotating disk 312. Through the rotation of the second shaft rod 322, the torsion and adjustment of the cable in different axial directions are realized.

[0048] Inside the shaft box assembly 320, the transmission gear ring 325 is fixed to one side of the ball cover 324 and is rotatably mounted on the surface of the rotating ball box 323. The end of the first shaft sleeve 321 penetrates the inner side of the rotating ball box 323 and is transmission-connected to the surface of the transmission gear ring 325. This transmission connection ensures that the dynamic clamping sleeve 340 can stably clamp the cable and perform axial rotation and torsion. In addition, the transmission key shaft 330 is located on the axis of the transmission gear ring 325 and is obliquely arranged on the inner side of the ball cover 324 and the rotating ball box 323, further ensuring that the cable is evenly stressed during the clamping process and avoiding torsional instability.

[0049] The dynamic clamping sleeve 340 is rotatably mounted on the surface of the ball cover 324, and one end of the dynamic clamping sleeve 340 is provided with a transmission shaft tooth 341 which is transmission-connected to the surface of the transmission key shaft 330. The end of the second shaft rod 322 is transmission-connected to the transmission key shaft 330. Through this transmission mode, the dynamic clamping sleeve 340 and the second shaft rod 322 can be combined to realize the axial rotation and deflection movement required by the cable during the test process.

[0050] Working effect: Through the axial rotation and deflection of the dynamic clamp 340 and the second shaft 322, the device can flexibly adjust the torsion direction and angle of the cable to ensure the test accuracy in different test modes. The cable can maintain a stable stress state under complex torsion and bending conditions, ensuring the accuracy of the test data.

[0051] In another part of the equipment, a protective cover 130 is rotatably mounted on the surface of the tension and torsion frame 100. The protective cover 130 is a heat-insulating material component that can effectively isolate the high and low temperature environments generated during the test, so that the temperature inside the equipment remains stable. A transparent window is provided on the surface of the protective cover 130 between the torque chuck 200 and the hinge and torsion assembly 300, which facilitates the operator to observe the state of the cable during the test.

[0052] The air cooling assembly 400 is fixedly installed on the inner side of the tension and twisting frame 100, and includes a circulating air box 410, a blast roller 420 and a heat exchanger 430. A flow channel is provided on the inner side of the circulating air box 410 for air circulation and temperature regulation. An air inlet seal 411 and an exhaust hole 412 connected to both ends of the flow channel are provided on the surface of the circulating air box 410, which serve as air inlet and exhaust ports, respectively, to ensure smooth circulation of air flow inside the device.

[0053] Working effect: During the test, the airflow circulation through the air inlet seal 411 and the exhaust hole 412 ensures the uniform distribution of temperature in the device and avoids local overheating or overcooling. In conjunction with the heating and cooling system inside the air cooling component 400, the temperature environment inside the device can be accurately controlled.

[0054] The heat exchanger 430 includes a fin grid, a cooling coil, and an electric heating wire embedded inside the fin grid. The cooling coil is filled with refrigerant and connected to a compression refrigeration system for testing under low temperature conditions; the electric heating wire is used for heating under high temperature conditions. The temperature sensor monitors the temperature changes inside the device in real time, and the control system adjusts the heating or cooling to achieve constant temperature control.

[0055] Working effect: Through the constant temperature control function of the heat exchanger 430, the equipment can maintain stable temperature conditions in high and low temperature environments, ensuring that the torque test results of the cable under different temperature conditions are accurate and reliable. The equipment can not only provide accurate torque testing, but also simulate complex working environments to comprehensively evaluate the durability and reliability of the cable.

[0056] In addition, the locking device provided on the surface of the fixed sleeve 310 and the first sleeve 321 by the locking pin rod 313 can lock the first sleeve 321 and the second shaft rod 322 during the test, thereby ensuring the stability of the cable in a state of long-term torque maintenance. This design is suitable for long-term bending tests, maintaining stable torque of the cable in a bending state, and ensuring the continuity of test data.

[0057] The working principle and use process of the present invention:

[0058] During the high and low temperature torque test of the cable, one end of the cable is fixed on the surface of the torque chuck 200, and the movable slide 142 is adjusted on the surface of the adjustment slide 140 by adjusting the screw shaft 141. The position of the hinge assembly 300 is adjusted according to the length of the cable to be tested, and the other end of the cable is clamped and fixed by the movable clamp 340;

[0059] During the axial torque test, the locking pin rod 313 on the surface of the fixed sleeve 310 abuts against the surface of the first sleeve 321 and the second shaft rod 322 to lock the deflection movement of the shaft box assembly 320 and the dynamic clamping sleeve 340. The torque chuck 200 is driven by the reduction transmission box 120 to rotate, driving the cable to rotate axially. The torque size is detected by the internal sensor of the detection seat 110 to collect test data.

[0060] During the bending torque test, the movable slide 142 is adjusted to a suitable position to reserve a certain bending margin for the cable torque test. The first turntable 311 and the second turntable 312 can be manually controlled to rotate, respectively driving the second shaft 322 and the first shaft sleeve 321 to rotate, driving the movable sleeve 340 to deflect on the surface of the rotating ball box 323 with the center of the transmission gear ring 325 as the center of the movement, driving the cable to bend and twist. The rotation of the second shaft 322 and the transmission key shaft 330 can drive the axial deflection of the movable sleeve 340 to further realize the bending and twisting of the cable. The test data is collected according to the force on the surface of the torque chuck 200 through the sensor group inside the detection seat 110;

[0061] In addition, axial torque and bending torque tests can be performed simultaneously according to actual test needs to determine the various torsional properties of the cable under complex working conditions.

[0062] During the test, a relatively sealed environment is constructed by closing the protective cover 130 on the surface of the tension and torsion rack 100. The temperature of the heat exchanger 430 is controlled by an electric heating module or a compression refrigeration system according to the test temperature requirements. The blower roller 420 drives the air flow inside the protective cover 130 to be introduced into the circulating air box 410. After the heat exchanger 430 controls the temperature through heat exchange, the sun ring is led out to control the ambient temperature inside the protective cover 130, and the torque test of the cable in high and low temperature environments is carried out.

[0063] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the 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 claims and their equivalents.

Claims

1. A cable high and low temperature torque test device, characterized in that: include: A tension and twisting frame (100), a torque chuck (200), an articulation assembly (300) and an air cooling assembly (400); the surface of the tension and twisting frame (100) is provided with a detection seat (110) and an adjustment slide (140); a movable slide (142) is slidably mounted on the surface of the adjustment slide (140); a screw shaft (141) for controlling the sliding of the movable slide (142) is provided on the inner side of the adjustment slide (140); a sensor group for detecting the stress state of the surface of the torque chuck (200) is provided on the inner side of the detection seat (110); a reduction transmission box (120) for driving the torque chuck (200) to rotate is fixedly mounted on one side of the tension and twisting frame (100); the torque chuck (200) and the articulation assembly (300) are rotatably mounted on the surfaces of the detection seat (110) and the movable slide (142) respectively and are located on the same horizontal axis; The hinge assembly (300) comprises a fixed shaft sleeve (310), a shaft box assembly (320), a transmission key shaft (330) and a dynamic clamping sleeve (340); the fixed shaft sleeve (310) is fixed to the inner side of the dynamic sliding seat (142); the shaft box assembly (320) comprises a first shaft sleeve (321) and a second shaft rod (322), a rotating ball box (323), a ball cover (324) and a transmission gear ring (325); the transmission gear ring (325) is fixed to one side of the ball cover (324) and is rotatably mounted on the surface of the rotating ball box (323). The first shaft sleeve (321) is rotatably sleeved on the inner side of the fixed shaft sleeve (310) and one end of the first shaft sleeve (322) is rotatably sleeved on the inner side of the first shaft sleeve (321) and one end of the second shaft rod (322) passes through the first rotary disk (311) and is connected to the second rotary disk (312). The end of the first shaft sleeve (321) passes through the inner side of the rotating ball box (323) and is drivingly connected to the surface of the transmission gear ring (325). The dynamic clamping sleeve (340) is rotatably mounted on the surface of the ball cover (324), and One end of the dynamic clamping sleeve (340) is provided with a transmission shaft tooth (341) which is transmission-connected to the surface of the transmission key shaft (330); the end of the second shaft (322) is transmission-connected to the surface of the transmission key shaft (330); the transmission key shaft (330) is located on the axis of the transmission gear ring (325) and is obliquely arranged on the inner side of the ball cover (324) and the rotating ball box (323); the torque clamp (200) and the dynamic clamping sleeve (340) are used for clamping and positioning the cable end; the second shaft (322) and the dynamic clamping sleeve (3 40) are located on the same horizontal axis in the initial state, the transmission gear ring (325) is arranged obliquely, the rotating ball box (323) and the ball cover (324) are semi-spherical shell structures, and the transmission key shaft (330) is located on the axis line of the rotating ball box (323) and the ball cover (324); the ends of the transmission shaft teeth (341) and the second shaft rod (322) are both in transmission engagement with the surface of the transmission key shaft (330), and the transmission of the dynamic clamping sleeve (340) and the second shaft rod (322) is realized through the transmission key shaft (330).

2. A cable high and low temperature torque test device according to claim 1, characterized in that: A protective cover (130) is rotatably mounted on the surface of the tension-twist frame (100). The protective cover (130) is a heat-insulating material component used to seal the environment of the top surface component of the tension-twist frame (100). A transparent window is provided on the surface of the protective cover (130) between the torque chuck (200) and the hinge-twist assembly (300).

3. A cable high and low temperature torque test device according to claim 1, characterized in that: A sensor group is provided inside the detection seat (110), and the sensor group comprises: A torque sensor, used for detecting the torsional moment generated by the torque chuck (200) during the axial torsion of the cable; A deflection force sensor, used to detect a change in torque when the torque clamp (200) is subjected to cable bending deflection; Stress sensor, used to monitor the stress changes of the cable during the test; The output end of the sensor group is electrically connected to the control system for real-time acquisition and processing of torque data of the cable during torsion and bending tests.

4. A cable high and low temperature torque test device according to claim 1, characterized in that: The surfaces of the fixed shaft sleeve (310) and the first shaft sleeve (321) are both provided with a plurality of locking pin rods (313); the locking pin rods (313) are electric push rod structures and are radially arranged on the surfaces of the fixed shaft sleeve (310) and the first shaft sleeve (321) and facing the surfaces of the first shaft sleeve (321) and the second shaft rod (322); the surfaces of the first shaft sleeve (321) and the second shaft rod (322) are provided with a plurality of rack keys; and the output end of the locking pin rod (313) is provided with locking teeth abutting against the surfaces of the first shaft sleeve (321) and the second shaft rod (322).

5. A cable high and low temperature torque test device according to claim 1, characterized in that: An air cooling component (400) is fixedly installed on the inner side of the tension and twisting frame (100), and the air cooling component (400) comprises a circulating air box (410) and a blowing roller (420) and a heat exchanger (430) located on the inner side of the circulating air box (410), and a flow channel is provided on the inner side of the circulating air box (410), and an air inlet seal (411) and an exhaust hole (412) connected to both ends of the flow channel are provided on the surface of the circulating air box (410).

6. A cable high and low temperature torque test device according to claim 5, characterized in that: The heat exchanger (430) comprises a fin grid, a refrigeration coil, and an electric heating wire embedded inside the fin grid; the interior of the refrigeration coil is filled with a refrigerant and is connected to a compression refrigeration system.

7. A cable high and low temperature torque test device according to claim 2, characterized in that: A temperature sensor is provided inside the protective cover (130) for real-time monitoring of the ambient temperature inside the protective cover (130), and constant temperature control is achieved through a compression refrigeration system and an electric heating wire electrically connected to a control system.

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