CN-122016467-A - Cable material tensile tester

CN122016467ACN 122016467 ACN122016467 ACN 122016467ACN-122016467-A

Abstract

The invention is suitable for the technical field of cable testing, and provides a cable material tension tester which comprises a workbench, wherein a sliding seat A and a sliding seat B are connected onto the workbench in a sliding manner, a motor A is fixedly connected onto the workbench, an output shaft of the motor A is fixedly connected with a bidirectional screw rod, the sliding seat A and the sliding seat B are respectively in threaded fit with two sections of threads on the bidirectional screw rod, a motor B is fixedly connected onto the sliding seat B, and clamping mechanisms are respectively arranged on an output shaft of the motor B and the sliding seat A and used for clamping and fixing a cable, and the cable tension tester further comprises a clamping force optimizing system. According to the scheme, the real-time self-adaptive adjustment of the clamping force is realized through the integrated cable initial damage evaluation, the clamping interface state evaluation and the dynamic risk evaluation module, and the problems of rough clamping force control, initial state evaluation deficiency, environmental factor influence and insufficient dynamic risk response in the traditional equipment are effectively solved.

Inventors

HU XIANYING
YU FEI
GUO TIANLIANG
ZHENG LU
WANG XIONGCHENG
ZOU LIFENG
LI YE
ZHU QINGJIE
ZENG BIN
XIAO XIONG
WU QIAONA
GE YUZHEN
WANG TAO
ZHANG YULI

Assignees

湖北才诚电力工程设计有限公司

Dates

Publication Date: 20260512
Application Date: 20260203

Claims (8)

1. The utility model provides a cable material tensile tester, includes workstation (1), its characterized in that, sliding connection has sliding seat A (2) and sliding seat B (3) on workstation (1), workstation (1) fixedly connected with motor A (4), the output shaft fixedly connected with two-way screw rod (5) of motor A (4), sliding seat A (2) and sliding seat B (3) carry out screw thread fit with two sections screw threads on two-way screw rod (5) respectively, fixedly connected with motor B (6) on sliding seat B (3), be provided with fixture (7) on the output shaft of motor B (6) and sliding seat A (2) respectively, fixture (7) are used for carrying out the centre gripping to the cable fixedly; also included is a clamping force optimization system, comprising: The cable initial damage evaluation module is used for constructing a cable initial damage evaluation model according to the accumulated torsion angle and the peak torsion rate of the cable and outputting an initial state index of the cable; The clamping interface state evaluation module is used for constructing a clamping interface efficiency evaluation model according to the environment temperature and the equivalent friction coefficient of the clamping interface and outputting a clamping stability index; The system dynamic risk assessment module is used for constructing a tensile instability risk real-time assessment model according to the cable axial force fluctuation standard deviation, the cable transverse vibration amplitude and the cable tensile strain rate under the influence of the cable initial state index and the clamping stability index, and outputting the tensile instability risk index; And the self-adaptive clamping control module is used for constructing a cable clamping force adjustment model by taking the tensile instability risk index as a driving signal, taking the cable reference clamping force as a reference and taking the maximum tolerance clamping force of the cable as a hard upper limit, and outputting the cable target clamping force.
2. The cable material tension tester as recited in claim 1, wherein the clamping mechanism (7) comprises a U-shaped clamp (71), a lower clamp seat (72), an electric telescopic rod (73) and an upper clamp seat (74); The telescopic end of motor B (6) and sliding seat A (2) all fixedly connected with U type anchor clamps (71), the interior bottom surface fixedly connected with of U type anchor clamps (71) is down anchor clamps (72), the top fixedly connected with electric telescopic handle (73) of U type anchor clamps (71), the telescopic end fixedly connected with of electric telescopic handle (73) goes up anchor clamps (74), goes up anchor clamps (74) and lower anchor clamps (72) relative terminal surface all are provided with the meshing tooth, and the meshing tooth homoenergetic on lower anchor clamps (72) and the last anchor clamps (74).
3. The cable material tension tester of claim 1, wherein the actual peak twist rate divided by the maximum allowable peak twist rate yields a peak twist rate index; In the cable initial damage assessment model, a cable initial state index is obtained by calculating a weighted sum of the accumulated torsion angle index and the peak torsion rate index and subtracting the weighted sum from 1.
4. The cable material tensile tester according to claim 1, wherein the clamping interface performance evaluation model is characterized in that the clamping stability index is obtained by multiplying a negative temperature sensitivity coefficient by a temperature deviation index which is a power function and then by an equivalent friction coefficient index, wherein the natural constant e is used as a base.
5. The cable material tension tester according to claim 4, wherein the coefficient of friction index is obtained by subtracting a minimum coefficient of friction threshold value at which the system can normally operate from an actual clamping interface equivalent coefficient of friction and dividing the minimum coefficient of friction threshold value by a reference coefficient of friction measured under standard laboratory conditions, and the temperature deviation index is obtained by subtracting the optimum ambient temperature from the actual ambient temperature, dividing the absolute value by the ambient temperature range in which the experiment is allowed.
6. The cable material tensile tester according to claim 1, wherein in the tensile instability risk real-time assessment model, a weighted sum of an axial force fluctuation standard deviation index, a transverse vibration amplitude index and a tensile speed index is calculated first, and then the weighted sum is divided by (1 plus a weighted sum of a cable initial state index and a clamping stability index) to obtain a tensile instability risk index.
7. The cable material tension tester according to claim 6, wherein the axial force fluctuation standard deviation index is obtained by dividing the actual cable axial force fluctuation standard deviation by the maximum allowable cable axial force fluctuation standard deviation, the transverse vibration amplitude index is obtained by dividing the actual cable transverse vibration amplitude by the maximum allowable cable transverse vibration amplitude, and the tensile speed index is obtained by dividing the actual cable tensile speed by the maximum allowable cable tensile speed.
8. The cable material tension tester according to claim 1, wherein in the cable clamping force adjustment model, the difference between the maximum cable withstand clamping force and the cable reference clamping force is multiplied by a tensile instability risk index, and finally the cable reference clamping force is added to obtain the cable target clamping force.

Description

Cable material tensile tester Technical Field The invention belongs to the technical field of cable testing, and particularly relates to a cable material tension tester. Background The reliability of the mechanical performance of the cable serving as a core carrier for power transmission and signal communication directly determines the safe and stable operation of the whole system. The tensile property is one of key indexes for measuring the quality of the cable, so that the cable material tensile tester is indispensable in links of cable production, research and development and quality detection. The conventional device is generally composed of a workbench, a movable clamping seat and a driving mechanism, wherein the clamping seat is driven by a motor to move so as to apply a tensile force to a cable, and data such as tensile strength are obtained. However, such devices expose multiple defects in practical applications, severely limiting the accuracy and reliability of the test results. The method is characterized in that the control mode of the clamping force is too extensive, the existing equipment generally depends on the clamping force preset by fixing or experience, the slipping and even falling between the cable and the clamp are easily caused due to insufficient clamping force, the test is interrupted, the mechanical extrusion damage to the cable sample can be caused at the initial stage of the test due to excessive clamping force, particularly the integrity of a surface insulating layer or a sheath is influenced, the stress distribution state of the cable can be changed due to the initial damage, and the measured breaking strength value deviates from the real performance of the material. Meanwhile, the equipment lacks an evaluation mechanism for the initial state of the cable sample, the traditional method cannot quantify the initial state, and a uniform clamping standard is adopted, so that the discreteness of the test result is obviously increased and the repeatability is insufficient. In summary, the core bottleneck of the prior art lies in the stationarity and blindness of the clamping process, and the clamping force setting, the actual state of the cable, the environmental conditions and the dynamic response of the test are seriously disjointed, so that the test accuracy and reliability are difficult to be improved, and a novel tensile test scheme with intelligent sensing, dynamic evaluation and self-adaptive adjustment capabilities is needed. In view of the above, there is a need in the art for improvements. Disclosure of Invention The embodiment of the invention aims to provide a cable material tension tester, which aims to solve the problems that in the prior art, the static state and blindness of a clamping process are realized, the clamping force setting and the actual state, the environmental condition and the test dynamic response of a cable are seriously disjointed, so that the test precision and the reliability are difficult to improve. The invention is realized in such a way, a cable material tensile tester comprises a workbench, wherein a sliding seat A and a sliding seat B are connected onto the workbench in a sliding way, a motor A is fixedly connected onto the workbench, an output shaft of the motor A is fixedly connected with a bidirectional screw rod, the sliding seat A and the sliding seat B are respectively in threaded fit with two sections of threads on the bidirectional screw rod, a motor B is fixedly connected onto the sliding seat B, and clamping mechanisms are respectively arranged on the output shaft of the motor B and the sliding seat A and are used for clamping and fixing a cable; also included is a clamping force optimization system, comprising: The cable initial damage evaluation module is used for constructing a cable initial damage evaluation model according to the accumulated torsion angle and the peak torsion rate of the cable and outputting an initial state index of the cable; The clamping interface state evaluation module is used for constructing a clamping interface efficiency evaluation model according to the environment temperature and the equivalent friction coefficient of the clamping interface and outputting a clamping stability index; The system dynamic risk assessment module is used for constructing a tensile instability risk real-time assessment model according to the cable axial force fluctuation standard deviation, the cable transverse vibration amplitude and the cable tensile strain rate under the influence of the cable initial state index and the clamping stability index, and outputting the tensile instability risk index; And the self-adaptive clamping control module is used for constructing a cable clamping force adjustment model by taking the tensile instability risk index as a driving signal, taking the cable reference clamping force as a reference and taking the maximum tolerance clamping force of the cable as a hard upper limit, and outputtin