Cable torsion test device

Abstract

The utility model discloses a cable torsion test device, comprising a cable, two ends of the cable are provided with torsion devices, one end of each torsion device far away from the cable is coaxially provided with a connecting part, and the connecting part is connected with a torsion sensor; a sliding device is arranged at the bottom of the torsion device and used for driving the torsion device to linearly slide in the first direction. A vibration excitation device is movably arranged between the torsion devices at the two ends, the vibration excitation device can slide in the second direction perpendicular to the first direction, the vibration excitation device comprises at least one pushing vibration excitation part making contact with the side face of the cable, and the pushing vibration excitation part is used for applying pressure and vibrating to the cable; according to the utility model, a torsion test can be carried out on the cable by combining the tension, radial pressure and vibration load conditions of the cable, so that the torsion test result of the cable is closer to the actual condition.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable detection tests and relates to a cable torsion test device. Background Art

[0002] In order to ensure the torsional strength of the cable, it is necessary to perform a torsion test on the cable. The existing cable torsion test is to clamp the two ends of the cable with a rotating clamp, and apply torsional forces in opposite directions to the two ends of the cable, thereby driving the cable to torsion and detecting the torsion applied to the cable during the torsion process. For example, in the utility model patent with patent number "CN220120590U", the two ends of the cable are driven to rotate in opposite directions by a rotating seat to realize the torsion test of the cable.

[0003] However, the existing cable torsion device can only apply torsional force to the cable. During the actual use of the cable, the cable will be subjected to tension, radial pressure, vibration, etc. during the torsion process. Therefore, the existing cable torsion device cannot perform torsion tests on the cable under comprehensive conditions in accordance with the actual load conditions of the cable. This leads to the final test results of the existing cable torsion device often being greatly different from the actual torsion conditions of the cable.

[0004] Therefore, in order to solve the defect that the existing cable torsion device cannot perform a torsion test of the cable under comprehensive conditions in accordance with the actual load conditions of the cable, the utility model discloses a cable torsion test device. Utility Model Content

[0005] The utility model aims to provide a cable torsion test device, which can comprehensively perform torsion test on the cable under the load conditions of tension, radial pressure and vibration of the cable, so that the torsion test result of the cable is closer to the actual situation.

[0006] The utility model is realized by the following technical solutions:

[0007] A cable torsion test device comprises a cable, wherein torsion devices are arranged at both ends of the cable, a connecting portion is coaxially arranged at one end of the torsion device away from the cable, and the connecting portion is connected to a torque sensor; a sliding device is arranged at the bottom of the torsion device, and the sliding device is used to drive the torsion device to slide linearly along a first direction; an excitation device is movably arranged between the torsion devices at both ends, and the excitation device can slide along a second direction perpendicular to the first direction, and the excitation device comprises at least one pushing excitation portion in contact with the side of the cable, and the pushing excitation portion is used to apply pressure and vibration to the cable.

[0008] The two ends of the cable are clamped and fixed by the torsion devices at both ends, and the two ends of the cable are driven to twist in opposite directions by the torsion devices at both ends to apply torsional force to the cable. When the cable is twisted, the torque sensor detects the torque applied to the cable in real time. At the same time, the sliding device at the bottom of the torsion device can drive the torsion devices at both ends to move away from each other, thereby applying tension to the cable to simulate the tension of the cable. An excitation device is provided between the torsion devices at both ends, and the excitation device moves along the second direction to contact the side of the cable, and applies thrust in the second direction to the cable through the top-pushing excitation part of the excitation device to change the bending of the cable. At the same time, the cable is vibrated by the top-pushing excitation part, thereby comprehensively simulating the torsion of the test cable under axial tension, radial thrust, and vibration conditions.

[0009] In order to better realize the present utility model, further, the excitation device includes a first linear moving device, a second linear moving device, an excitation generator, and an excitation contact. The first linear moving device is located between the torsion devices at both ends, and the moving end of the first linear moving device moves along the first direction; the moving end of the first linear moving device is provided with a second linear moving device, the moving end of the second linear moving device moves along the second direction, the moving end of the second linear moving device is provided with an excitation generator, and the excitation generator is provided with an excitation contact that contacts the cable.

[0010] In order to better realize the utility model, further, the excitation contact includes a first half hoop and a second half hoop, the first half hoop and the second half hoop are respectively arranged on both sides of the cable, and the first half hoop and the second half hoop are spliced ​​with each other to contact both sides of the cable at the same time.

[0011] In order to better realize the utility model, further, the torsion device includes a torsion clamp, a torsion motor, a torsion gear ring, a torsion gear, and a torsion sleeve. The torsion clamp clamps the end of the cable at one end close to the cable, and the torsion clamp is coaxially connected to the torque sensor through a torsion sleeve at one end away from the cable; a torsion gear ring is arranged on the outside of the torsion clamp, and a torsion gear is mounted on the output shaft of the torsion motor, and the torsion gear is meshed and connected with the torsion gear ring.

[0012] In order to better realize the utility model, further, the torsion clamp includes a supporting half ring, a limiting half ring, and a clamping block. The supporting half ring and the limiting half ring are assembled to form a clamping space for the end of the cable to pass through, and the clamping block is movably set on the limiting half ring in a direction perpendicular to the cable axis.

[0013] In order to better implement the present invention, further, the ratio of the number of teeth of the torsion gear ring to the number of teeth of the torsion gear is greater than or equal to 3:1.

[0014] In order to better realize the utility model, further, the sliding device includes a slide rail, a sliding seat, a screw, and a sliding motor. The slide rail is arranged at the end of the cable along the first direction, a sliding seat is slidably arranged on the slide rail, and a torsion device is arranged on the sliding seat; a screw is arranged on one side of the slide rail for parallel rotation, the screw is connected to the bottom thread of the sliding seat, and one end of the screw is transmission-connected to the output end of the sliding motor.

[0015] In order to better implement the utility model, further, a tension sensor is arranged on the sliding seat, and a measuring end of the tension sensor is connected to the torsion device.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The utility model provides torsion devices at both ends of a cable, applies torsion forces in opposite directions to the two ends of the cable through the torsion devices at both ends, thereby driving the cable to perform torsion of different strokes, and realizing torsion tests on the cable under different torsion loads; at the same time, the utility model provides a sliding device at the bottom of the torsion device, drives the torsion devices at both ends of the cable to slide away from each other through the sliding device, thereby applying different tensile loads to the cable; provides an exciting device that moves radially along the cable between the torsion devices at both ends, radially squeezes the cable through the exciting device to apply different radial pressure loads to the cable, and simultaneously applies vibrations of different frequencies to the cable through the exciting device; finally, the torsion test of the cable with different torsion loads is realized under the conditions of comprehensive tensile load, radial pressure load and vibration load, thereby ensuring that the torsion test result of the cable is closer to the actual working condition of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the front view of the cable torsion test device;

[0019] Figure 2 It is a top view of the cable without radial pressure;

[0020] Figure 3 It is a top view of the cable subjected to radial pressure;

[0021] Figure 4 for Figure 1 A partial enlarged view of the structure at A;

[0022] Figure 5 is a schematic diagram of the structure of the torsion device;

[0023] Figure 6 for Figure 1 BB section view.

[0024] Among them: 1-cable; 2-torsion device; 3-torque sensor; 4-sliding device; 5-excitation device; 21-torsion clamp; 22-torsion motor; 23-torsion gear ring; 24-torsion gear; 25-torsion sleeve; 41-slide rail; 42-sliding seat; 43-screw; 44-sliding motor; 51-first linear moving device; 52-second linear moving device; 53-excitation generator; 100-first half hoop; 200-second half hoop; 211-support half ring; 221-limiting half ring; 213-pressing block. DETAILED DESCRIPTION

[0025] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model explicitly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0028] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0029] Embodiment 1:

[0030] A cable torsion test device of the present embodiment includes a cable 1, wherein torsion devices 2 are provided at both ends of the cable 1, and a connecting portion is coaxially provided at one end of the torsion device 2 away from the cable 1, and the connecting portion is connected to a torque sensor 3; a sliding device 4 is provided at the bottom of the torsion device 2, and the sliding device 4 is used to drive the torsion device 2 to slide linearly along a first direction; an excitation device 5 is movably provided between the torsion devices 2 at both ends, and the excitation device 5 can slide along a second direction perpendicular to the first direction, and the excitation device 5 includes at least one pushing excitation portion in contact with the side of the cable 1, and the pushing excitation portion is used to apply pressure and vibration to the cable 1.

[0031] like Figure 1 As shown, the left and right ends of the workbench are respectively provided with a torsion device 2, and a cable 1 is provided between the torsion devices 2 at both ends, and the two ends of the cable 1 are clamped and fixed by the torsion devices 2 at both ends. The torsion devices 2 at the left and right ends are rotated in opposite directions to twist the cable 1. By controlling the torsion stroke of the torsion device 2, the torsion degree of the cable 1 can be controlled, and the torque sensor 3 connected with the torsion device 2 can detect the torque magnitude of the cable 1 in real time. The bottom of the torsion device 2 is provided with a sliding device 4, which can drive the torsion device 2 to move along the first direction. When the torsion devices 2 at both ends move away from each other under the drive of the sliding device 4, a pulling force can be applied to the cable 1. An excitation device 5 is provided between the torsion devices 2 at the left and right ends. The excitation device 5 has two functions. The first function is that the excitation device 5 moves along the second direction, thereby applying radial pressure to the cable 1. The second function is that after the push excitation part in the excitation device 5 contacts the side of the cable 1, the excitation device 5 applies vibration to the cable 1.

[0032] like Figure 2 As shown, at this time, the excitation device 5 does not move along the second direction, that is, the cable 1 is not subjected to radial pressure at this time, so that the cable 1 is in a straight state. Figure 3 As shown, at this time, the vibration device 5 moves along the second direction, and the cable 1 is subjected to radial pressure, so that the cable 1 is in a bent state. At the same time, vibrations of different frequencies can be applied to the cable 1 by the vibration device 5.

[0033] Torsion is applied to the cable 1 by the torsion device 2, tension is applied to the cable 1 by the sliding device 4 along the first direction, and radial pressure and vibration are applied to the cable 1 by the movement of the excitation device 5 along the second direction. By coordinating the above-mentioned torque, tension, radial pressure and vibration, the torsion situation of the cable 1 under the influence of complex environment in the actual environment can be simulated, so that the final test result is closer to the actual situation.

[0034] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0035] Embodiment 2:

[0036] A cable torsion test device, improved on the basis of embodiment 1, such as Figure 1-Figure 3 , Figure 6 As shown, the excitation device 5 includes a first linear moving device 51, a second linear moving device 52, an excitation generator 53, and an excitation contact. The first linear moving device 51 is located between the torsion devices 2 at both ends, and the moving end of the first linear moving device 51 moves along the first direction; the moving end of the first linear moving device 51 is provided with a second linear moving device 52, the moving end of the second linear moving device 52 moves along the second direction, the moving end of the second linear moving device 52 is provided with an excitation generator 53, and the excitation generator 53 is provided with an excitation contact that contacts the cable 1.

[0037] The first linear motion device 51 includes a first slide rail, a first slider, and a first cylinder arranged along a first direction. The first slider is slidably mounted on the top of the first slide rail. A second linear motion device 52 is mounted on the top of the first slider. The first slider is driven to slide along the first slide rail by the extension and contraction of the first cylinder, thereby driving the second linear motion device 52 to move along the first direction to adjust the position of the excitation generator 53 relative to the cable 1 in the first direction, so that the excitation generator 53 applies radial pressure and vibration to the cable 1 at different positions in the first direction. For example, by moving the first linear motion device 51, the excitation generator 53 is moved along the first direction to a special position close to a cable joint, a cable sheath, a cable diameter change, etc. for a torsion test.

[0038] The second linear moving device 52 includes a second slide rail, a second slider, a screw rod, and a motor arranged along the second direction. The second slider is slidably arranged on the second slide rail, and a vibration generator 53 is arranged on the top of the second slider. A threaded hole that is threadedly connected to the screw rod is arranged at the bottom of the second slider, and a motor is arranged at one end of the screw rod. The rotation of the screw rod drives the vibration generator 53, the first half hoop 100, and the second half hoop 200 on the second slider to move along the second direction.

[0039] Furthermore, the excitation contact includes a first half hoop 100 and a second half hoop 200, the first half hoop 100 and the second half hoop 200 are respectively arranged on both sides of the cable 1, and the first half hoop 100 and the second half hoop 200 are spliced ​​with each other to contact both sides of the cable 1 at the same time.

[0040] The first half hoop 100 and the second half hoop 200 are mutually buckled and installed on both sides of the cable 1 through tightening bolts, and the first half hoop 100 and the second half hoop 200 are vibrated by the excitation generator 53 to transmit the vibration to the cable 1. At the same time, the second linear moving device 52 drives the first half hoop 100 and the second half hoop 200 to move along the second direction, and the first half hoop 100 and the second half hoop 200 are used to radially squeeze the side of the cable 1. The first half hoop 100 and the second half hoop 200 increase the contact area with the cable 1, so that the radial pressure on the cable 1 is more uniform, and the radial pressure on the cable 1 is prevented from being concentrated, which may cause the cable 1 to deform or even break.

[0041] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0042] Embodiment 3:

[0043] A cable torsion test device, improved on the basis of embodiment 1 or 2, such as Figure 4 and Figure 5 As shown, the torsion device 2 includes a torsion clamp 21, a torsion motor 22, a torsion gear ring 23, a torsion gear 24, and a torsion sleeve 25. The torsion clamp 21 clamps the end of the cable 1 at one end close to the cable 1, and the end of the torsion clamp 21 away from the cable 1 is coaxially connected to the torque sensor 3 through the torsion sleeve 25; a torsion gear ring 23 is arranged on the outside of the torsion clamp 21, and a torsion gear 24 is mounted on the output shaft of the torsion motor 22, and the torsion gear 24 is meshed and connected with the torsion gear ring 23.

[0044] Furthermore, the torsion clamp 21 includes a supporting half ring 211, a limiting half ring 212, and a clamping block 213. The supporting half ring 211 and the limiting half ring 212 are assembled to form a clamping space for the end of the cable 1 to pass through. The clamping block 213 is movably set on the limiting half ring 212 in a direction perpendicular to the axis of the cable 1.

[0045] The limiting semi-ring 212 is provided with a radial threaded hole, in which an adjusting bolt is threadedly installed, one end of the adjusting bolt extends to the inside of the clamping space and is provided with a clamping block 213. By rotating the adjusting bolt, the clamping block 213 is driven to move radially to press the cable 1 against the supporting ring surface inside the supporting semi-ring 211, thereby fixing the cable 1. In order to increase the contact surface, the clamping block 213 is arc-shaped, and an anti-slip pattern is provided on the clamping surface of the clamping block 213 to ensure that the cable 1 is firmly clamped and fixed.

[0046] The torsion sleeve 25 is rotatably mounted inside the bearing seat. The upper and lower sides of the torsion sleeve 25 close to the cable 1 are provided with a limited semi-ring 212 and a supporting semi-ring 211. The end of the torsion sleeve 25 away from the cable 1 is provided with a spline hole. The detection end of the torque sensor 3 is connected to the spline hole through the spline shaft, so that the detection end of the torque sensor 3 can rotate synchronously with the torsion sleeve 25 to detect the torque applied to the cable 1. The outer sleeve of the torsion sleeve 25 is provided with a torsion gear ring 23, which is driven by the torsion motor 22 to rotate the torsion gear 24, thereby driving the torsion gear ring 23 and the torsion sleeve 25 to rotate, so as to apply a torsion force to the cable 1.

[0047] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0048] Embodiment 4:

[0049] A cable torsion test device is improved on the basis of any one of embodiments 1-3, wherein the ratio of the number of teeth of the torsion gear ring 23 to the number of teeth of the torsion gear 24 is greater than or equal to 3:1, and by setting a larger reduction ratio, it is ensured that the torsion gear ring 23 drives the torsion sleeve 25 to rotate smoothly at a low speed, thereby avoiding the torsion sleeve 25 from rotating too fast or turning too much at an angle, which may cause direct damage to the cable 1.

[0050] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0051] Embodiment 5:

[0052] A cable torsion test device, improved on the basis of any one of embodiments 1-4, such as Figure 1 and Figure 4 As shown, the sliding device 4 includes a sliding rail 41, a sliding seat 42, a screw 43, and a sliding motor 44. The sliding rail 41 is arranged at the end of the cable 1 along the first direction, and the sliding seat 42 is slidably arranged on the sliding rail 41, and the sliding seat 42 is provided with a torsion device 2; a screw 43 is rotatably arranged on one side of the sliding rail 41, and the screw 43 is threadedly connected with the bottom of the sliding seat 42, and one end of the screw 43 is drivingly connected to the output end of the sliding motor 44.

[0053] The screw 43 is rotatably arranged on one side of the slide rail 41 through the bearing seat, and the bottom of the slide seat 42 is threadedly connected to the screw 43 through a threaded hole. The screw 43 is driven to rotate by the sliding motor 44, thereby driving the slide seat 42 to slide along the slide rail 41, and finally driving the torsion device 2 installed on the slide seat 42 to move along the first direction.

[0054] Furthermore, a tension sensor is provided on the sliding seat 42 , and a measuring end of the tension sensor is connected to the torsion device 2 . The tension sensor indirectly detects the tension exerted on the cable 1 when the torsion device 2 moves along the first direction.

[0055] The other parts of this embodiment are the same as any one of Embodiments 1-4, so they are not described again.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A cable torsion test device, comprising a cable (1), characterized in that: The cable (1) is provided with a torsion device (2) at both ends, and a connecting portion is coaxially provided at one end of the torsion device (2) away from the cable (1), and the connecting portion is connected to a torque sensor (3); a sliding device (4) is provided at the bottom of the torsion device (2), and the sliding device (4) is used to drive the torsion device (2) to slide linearly along a first direction; an excitation device (5) is movably provided between the torsion devices (2) at both ends, and the excitation device (5) can slide along a second direction perpendicular to the first direction, and the excitation device (5) includes at least one pushing excitation portion in contact with a side surface of the cable (1), and the pushing excitation portion is used to apply pressure and vibration to the cable (1).

2. A cable torsion test device according to claim 1, characterized in that: The excitation device (5) comprises a first linear moving device (51), a second linear moving device (52), an excitation generator (53), and an excitation contact. The first linear moving device (51) is located between the torsion devices (2) at both ends, and the moving end of the first linear moving device (51) moves along a first direction. The moving end of the first linear moving device (51) is provided with a second linear moving device (52), and the moving end of the second linear moving device (52) moves along a second direction. The moving end of the second linear moving device (52) is provided with an excitation generator (53), and the excitation generator (53) is provided with an excitation contact that contacts the cable (1).

3. A cable torsion test device according to claim 2, characterized in that: The excitation contact comprises a first half hoop (100) and a second half hoop (200); the first half hoop (100) and the second half hoop (200) are respectively arranged on both sides of the cable (1); the first half hoop (100) and the second half hoop (200) are assembled with each other to contact both sides of the cable (1) at the same time.

4. A cable torsion test device according to any one of claims 1 to 3, characterized in that: The torsion device (2) comprises a torsion clamp (21), a torsion motor (22), a torsion gear ring (23), a torsion gear (24), and a torsion shaft sleeve (25); the torsion clamp (21) clamps the end of the cable (1) at one end close to the cable (1); the torsion clamp (21) is coaxially connected to the torque sensor (3) via the torsion shaft sleeve (25); a torsion gear ring (23) is arranged outside the torsion clamp (21); a torsion gear (24) is sleeved on the output shaft of the torsion motor (22); and the torsion gear (24) is meshingly connected to the torsion gear ring (23).

5. A cable torsion test device according to claim 4, characterized in that: The torsion clamp (21) comprises a supporting half ring (211), a limiting half ring (212), and a clamping block (213); the supporting half ring (211) and the limiting half ring (212) are assembled to form a clamping space for the end of the cable (1) to pass through; the clamping block (213) is movably arranged on the limiting half ring (212) in a direction perpendicular to the axis of the cable (1).

6. A cable torsion test device according to claim 5, characterized in that: The ratio of the number of teeth of the torsion gear ring (23) to the number of teeth of the torsion gear (24) is greater than or equal to 3:

1.

7. A cable torsion test device according to any one of claims 1 to 3, characterized in that: The sliding device (4) comprises a sliding rail (41), a sliding seat (42), a screw (43), and a sliding motor (44); the sliding rail (41) is arranged at the end of the cable (1) along a first direction; a sliding seat (42) is slidably arranged on the sliding rail (41); and a twisting device (2) is arranged on the sliding seat (42); a screw (43) is rotatably arranged on one side of the sliding rail (41); the screw (43) is threadably connected to the bottom of the sliding seat (42); and one end of the screw (43) is drivingly connected to the output end of the sliding motor (44).

8. A cable torsion test device according to claim 7, characterized in that: A tension sensor is provided on the sliding seat (42), and a measuring end of the tension sensor is connected to the torsion device (2).

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