Calibration tool suitable for tensile torsion test platform
By designing a calibration fixture suitable for a tensile torsion testing platform, the error problem caused by long-term use of the testing platform was solved, thus achieving the accuracy of performance testing and the safety and reliability of the system.
Patent Information
- Application Number
- CN202423308173.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Tensile and torsion testing platforms are prone to testing errors after prolonged use, which can affect the safety and reliability of LNG hose refueling systems and make it impossible to accurately assess whether tensile and torsion performance indicators meet usage requirements.
Design a calibration fixture suitable for tensile and torsion testing platforms, including a tensile calibration fixture and a torsion calibration fixture, which provides accurate calibration results and is easy to operate.
By calibrating the testing errors generated by the long-term use of the tensile and torsion testing platform using calibration fixtures, the accuracy of tensile and torsion performance testing is improved, and the safety and reliability of the LNG hose refueling system are enhanced.
Smart Images
Figure CN223808253U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to calibration frock technical field, especially applicable to calibration frock of stretching torsion test platform. BACKGROUND
[0002] The LNG conveying hose is the core component of the LNG hose filling system, and various performance indexes thereof need to meet the use requirements of complex working conditions, and if not, the safety and stable operation of the LNG hose filling system will be affected. The stretching and torsion performance has an important influence on the safety and reliability of the LNG hose filling system, and therefore the stretching and torsion performance of the LNG hose needs to be tested on a specific test platform. However, the long-time use of the test platform is prone to test errors, which affects the accuracy of the stretching and torsion performance test values, and the stretching and torsion performance indexes cannot be accurately evaluated to meet the use requirements of the LNG hose filling system. Therefore, there is an urgent need to provide a calibration frock applicable to a stretching and torsion test platform to solve the above problems. SUMMARY
[0003] Based on the above, the utility model discloses a purpose to provide a kind of calibration frock applicable to stretching torsion test platform, calibration result is accurate, it is convenient to operate.
[0004] To achieve the above purpose, the utility model adopts the following technical scheme:
[0005] A kind of calibration frock applicable to stretching torsion test platform, the stretching torsion test platform includes the stretching test machine and the torsion test machine being oppositely arranged along the first direction, the calibration frock includes stretching calibration frock and torsion calibration frock;
[0006] The stretching calibration frock includes tension rod, stretching sensor, first connecting flange and second connecting flange, the stretching sensor is arranged at the outer periphery of the tension rod, the first connecting flange and the second connecting flange are respectively arranged at both ends of the tension rod, the first connecting flange is detachably connected with one drive end in the stretching test machine and the torsion test machine, and the second connecting flange is detachably connected with another drive end in the stretching test machine and the torsion test machine;
[0007] The torsion calibration frock includes torque rod, torque sensor, third connecting flange and fourth connecting flange, the torque sensor is arranged at the outer periphery of the torque rod, the third connecting flange is detachably connected with one drive end in the stretching test machine and the torsion test machine, and the fourth connecting flange is detachably connected with another drive end in the stretching test machine and the torsion test machine.
[0008] As a preferred solution of the calibration tool suitable for the tensile torsion test platform, the first connecting flange is connected to one end of the tension rod through a shackle, a first lifting ring is arranged on the first connecting flange, and a second lifting ring is arranged on one end of the tension rod, and the first lifting ring is connected with the second lifting ring through the shackle.
[0009] As a preferred solution of the calibration tool suitable for the tensile torsion test platform, the shackle comprises a shackle body and a shackle pin, the shackle body passes through the first lifting ring, and the top of the shackle body is provided with a shackle head on each side, and the second lifting ring is located between the two shackle heads, and the shackle pin passes through the second lifting ring and the two shackle heads.
[0010] As a preferred solution of the calibration tool suitable for the tensile torsion test platform, the two shackle heads are threadedly connected with the shackle pin, or the shackle pin is provided with external threads, and the shackle pin is threadedly connected with a nut after passing through the second lifting ring and the two shackle heads.
[0011] As a preferred solution of the calibration tool suitable for the tensile torsion test platform, the display module is electrically connected with the tensile sensor and the torque sensor, and the display module is used for displaying the first measurement value of the tensile sensor and the second measurement value of the torque sensor.
[0012] As a preferred solution of the calibration tool suitable for the tensile torsion test platform, the control module is electrically connected with the display module, the tensile testing machine and the torsion testing machine, the control module is used for controlling the tensile testing machine to start and stop according to the first preset load value, the control module is also used for controlling the torsion testing machine to start and stop according to the second preset load value, and the display module is also used for displaying the first preset load value and the second preset load value.
[0013] As a preferred solution of the calibration tool suitable for the tensile torsion test platform, the comparison module is electrically connected with the control module, the comparison module is used for comparing the first measurement value with the first preset load value, and the comparison module is also used for comparing the second measurement value with the second preset load value, and the control module calibrates the first preset load value of the tensile testing machine and the second preset load value of the torsion testing machine according to the comparison result of the comparison module.
[0014] The calibration tool has the following beneficial effects:
[0015] The utility model provides a kind of calibration tool suitable for tensile torsion test platform, the calibration tool includes tensile calibration tool and torsion calibration tool, tensile calibration tool includes tension rod and tensile sensor, and the tension load detection value that tension rod bears is obtained by tensile sensor, and the torsion load detection value that torsion rod bears is obtained by torque sensor of torsion calibration tool, and the preset tensile load is loaded to tensile calibration tool by tensile testing machine, and the preset torsion load is loaded to torsion calibration tool by torsion testing machine, and the driving end of tensile testing machine and torsion testing machine is connected respectively with the two ends of tensile calibration tool or the two ends of torsion calibration tool, and the detection value obtained by tensile sensor and torque sensor is compared with the load value loaded by tensile testing machine and torsion testing machine, to judge whether the performance detection of tensile torsion test platform is accurate, finally preset load value loaded to tensile torsion test platform is calibrated, and the calibration tool has the characteristics of accurate calibration result and easy operation. The test error generated by long-time use of tensile torsion test platform is calibrated by calibration tool, the accuracy of tensile, torsion performance test value is improved, and the safety and reliability of LNG hose filling system are enhanced. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the description of the embodiments of the utility model will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the contents of the embodiments of the utility model and these drawings by those skilled in the art without creating any creative labor.
[0017] Fig. 1 is the structural schematic diagram of the tensile calibration tool provided by the embodiments of the utility model;
[0018] Fig. 2 is the structural schematic diagram of the torsion calibration tool provided by the embodiments of the utility model;
[0019] Fig. 3 is the structural schematic diagram of the tensile torsion test platform provided by the embodiments of the utility model (when tensile test calibration)
[0020] Fig. 4 is the structural schematic diagram of the tensile torsion test platform provided by the embodiments of the utility model (when torsion test calibration).
[0021] In the drawings:
[0022] 1, tensile calibration tool; 11, tension rod; 12, tensile sensor; 13, first connecting flange; 14, second connecting flange; 15, buckle; 16, first lifting ring; 17, second lifting ring;
[0023] 2, torsion calibration tool; 21, torsion bar; 22, torque sensor; 23, third connecting flange; 24, fourth connecting flange;
[0024] 3, tensile torsion test platform; 31, tensile testing machine; 311, first mounting flange; 32, torsion testing machine; 321, second mounting flange. DETAILED DESCRIPTION
[0025] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0026] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0027] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0028] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.
[0029] As Figs. 1 to 4The utility model discloses a kind of calibration tool suitable for tensile torsion test platform, tensile torsion test platform 3 includes tensile testing machine 31 and torsion testing machine 32 being oppositely arranged along first direction, calibration tool includes tensile calibration tool 1 and torsion calibration tool 2;Tensile calibration tool 1 includes tension rod 11, tensile sensor 12, first connecting flange 13 and second connecting flange 14, tensile sensor 12 is arranged at the outer periphery of tension rod 11, first connecting flange 13 and second connecting flange 14 are respectively arranged at both ends of tension rod 11, first connecting flange 13 is detachably connected with one drive end in tensile testing machine 31 and torsion testing machine 32, and second connecting flange 14 is detachably connected with another drive end in tensile testing machine 31 and torsion testing machine 32;Torsion calibration tool 2 includes torque rod 21, torque sensor 22, third connecting flange 23 and fourth connecting flange 24, torque sensor 22 is arranged at the outer periphery of torque rod 21, third connecting flange 23 is detachably connected with one drive end in tensile testing machine 31 and torsion testing machine 32, and fourth connecting flange 24 is detachably connected with another drive end in tensile testing machine 31 and torsion testing machine 32.Tension rod 11 is borne by the tensile load detection value obtained by tensile sensor 12, and the torsional load detection value obtained by torque sensor 22 is borne by torque rod 21, and then the preset tensile load is loaded to tensile calibration tool 1 by tensile testing machine 31, and the preset torsional load is loaded to torsion calibration tool 2 by torsion testing machine 32, and the drive end of tensile testing machine 31 and torsion testing machine 32 is connected with the both ends of tensile calibration tool 1 or the both ends of torsion calibration tool 2 respectively, and the detection value obtained by tensile sensor 12 and torque sensor 22 is compared with the load value loaded by tensile testing machine 31 and torsion testing machine 32, to judge whether the performance detection value of tensile torsion test platform 3 is accurate, and finally the preset load value loaded to tensile torsion test platform 3 is calibrated, and the calibration tool has the characteristics of accurate calibration result and convenient operation.The test error generated by long-time use of tensile torsion test platform 3 is calibrated by calibration tool, the accuracy of tensile and torsional performance test value is improved, and the safety and reliability of LNG hose filling system are enhanced.
[0030] Further, the tensile testing machine 31 is used to load the preset tensile load to the tensile calibration tool 1, and the torsion testing machine 32 is used to load the preset torsional load to the torsion calibration tool 2. Wherein, the drive end of the tensile testing machine 31 is telescopic along the first direction, and the rotation axis of the drive end of the torsion testing machine 32 is parallel to the first direction. The above-mentioned first direction is parallel to the straight line where the tension rod 11 is located.
[0031] Specifically, the first connecting flange 13 is connected to one end of the tension rod 11 through the shackle 15, the first connecting flange 13 is provided with the first lifting ring 16, one end of the tension rod 11 is provided with the second lifting ring 17, and the first lifting ring 16 and the second lifting ring 17 are connected through the shackle 15. The connecting parts of the shackle 15 and the first lifting ring 16 abut against each other, have a cross structure, cannot rotate relative to each other, and when the tension rod 11 is subjected to an axial load applied by the tensile testing machine 31, the tension rod 11 generally only has an axial tensile force, but when the load is too large, the tension rod 11 can be offset in other directions, thereby affecting the detection value of the tensile sensor 12. The relative arrangement of the shackle 15 and the first lifting ring 16 can prevent the tension rod 11 from being offset during the force process, thereby controlling the force angle of the tensile sensor 12 to remain unchanged and improving the accuracy of the detection value of the tensile sensor 12.
[0032] More specifically, the shackle 15 includes a shackle body and a shackle pin, the shackle body passes through the first lifting ring 16, the top of the shackle body is provided with a shackle head on each side, the second lifting ring 17 is located between the two shackle heads, and the shackle pin passes through the second lifting ring 17 and the two shackle heads. The shackle pin is used to connect and fix the shackle body and the second lifting ring 17, thereby improving the stability of the overall structure of the tensile calibration tool 1. Since the shackle 15 has a mature structure, it will not be described again here.
[0033] In this embodiment, the two shackle heads are threadedly connected to the shackle pin, the two shackle heads are provided with internal threads, and the shackle pin is provided with external threads. After the shackle pin passes through one shackle head, the second lifting ring 17 and the other shackle head, the internal threads of the shackle head and the external threads of the shackle pin are tightened relative to each other, thereby connecting and fixing the shackle body and the second lifting ring 17.
[0034] In another embodiment, the shackle pin is provided with external threads, and the shackle pin is threadedly connected to a nut after passing through the second lifting ring 17 and the two shackle heads. When the shackle pin is provided with a shackle pin knob at one end, the other end of the shackle pin is tightened and fixed by the nut after passing through the second lifting ring 17 and the two shackle heads. When the shackle pin is not provided with a shackle pin knob, both ends of the shackle pin are tightened and fixed by a nut after passing through the second lifting ring 17 and the two shackle heads, thereby connecting and fixing the shackle body and the second lifting ring 17.
[0035] Further, the driving end of the tensile testing machine 31 is provided with a first mounting flange 311, and the driving end of the torsion testing machine 32 is provided with a second mounting flange 321; the first mounting flange 311 is detachably connected with the second connecting flange 14, and the second mounting flange 321 is detachably connected with the first connecting flange 13; the first mounting flange 311 is detachably connected with one of the third connecting flange 23 and the fourth connecting flange 24, and the second mounting flange 321 is detachably connected with the other one of the third connecting flange 23 and the fourth connecting flange 24. When it is necessary to detect the accuracy of the tensile performance of the tensile-torsion testing platform 3, the first mounting flange 311 is connected with the second connecting flange 14, and the second mounting flange 321 is connected with the first connecting flange 13, so that the tensile calibration tool 1 is mounted on the tensile-torsion testing platform 3, and the tensile performance detection calibration is completed; when it is necessary to detect the accuracy of the torsion performance of the tensile-torsion testing platform 3, the first connecting flange 13 and the second connecting flange 14 are first separated from the first mounting flange 311 and the second mounting flange 321 respectively, then the first mounting flange 311 is connected with the fourth connecting flange 24, and the second mounting flange 321 is connected with the third connecting flange 23, or the first mounting flange 311 is connected with the third connecting flange 23, and the second mounting flange 321 is connected with the fourth connecting flange 24, so that the torsion calibration tool 2 is mounted on the tensile-torsion testing platform 3, and the torsion performance detection calibration is completed, which is convenient to operate.
[0036] Further, threaded holes are arranged on the first mounting flange 311, the second mounting flange 321, the first connecting flange 13, the second connecting flange 14, the third connecting flange 23 and the fourth connecting flange 24, and bolts are threadedly connected with the threaded holes of any one of the mounting flanges and the connecting flanges arranged oppositely, so as to realize the detachable connection of the corresponding mounting flange and the connecting flange, and facilitate the alternate calibration of the tensile calibration tool 1 and the torsion calibration tool 2.
[0037] Preferably, the tensile testing machine 31 is a hydraulic drive assembly, and the hydraulic drive assembly includes a hydraulic cylinder, and the driving rod of the hydraulic cylinder is connected with the second mounting flange 321. When the tensile calibration tool 1 and the torsion calibration tool 2 are mounted on the tensile-torsion testing platform 3, the driving rod of the hydraulic cylinder is stretched and contracted in the first direction to adjust the relative distance between the first mounting flange 311 and the second mounting flange 321, so that the corresponding connecting flanges at both ends of the tensile calibration tool 1 and the torsion calibration tool 2 are connected and fixed with the corresponding mounting flanges on the tensile testing machine 31 and the torsion testing machine 32, and the mounting and fixing of the tensile calibration tool 1 and the torsion calibration tool 2 are completed. After the mounting is completed, the driving rod of the hydraulic cylinder applies a preset axial tensile load to the tension rod 11, so as to complete the application of the tensile load to the tensile calibration tool 1.
[0038] Preferably, the driving end of the torsion testing machine 32 is provided as a rotating motor, one end of the rotating motor is connected with the control end of the torsion testing machine 32, the other end is connected with the second mounting flange 321, and the rotating axis of the rotating motor is parallel to the first direction. After the installation and fixation of the torsion calibration tool 2 are completed, the preset torsion load is applied to the torsion rod 21 by the rotating motor, so that the application of the torsion load to the torsion calibration tool 2 is completed.
[0039] Specifically, the calibration tool further comprises a display module, the display module is electrically connected with the tensile sensor 12 and the torque sensor 22, and the display module is used to display the first measurement value of the tensile sensor 12 and the second measurement value of the torque sensor 22. Exemplarily, the display module comprises a display, the display is connected with the tensile sensor 12 and the torque sensor 22, the operation of the display is intuitive and convenient, the measurement values of the tensile sensor 12 and the torque sensor 22 can be observed at any time through the display, and the calibration efficiency of the tensile and torsion test platform 3 is improved.
[0040] Further, the calibration tool further comprises a control module, the display module, the tensile testing machine 31 and the torsion testing machine 32 are electrically connected with the control module, the control module is used to control the tensile testing machine 31 to start and stop according to the first preset load value, the control module is also used to control the torsion testing machine 32 to start and stop according to the second preset load value, and the display module is also used to display the first preset load value and the second preset load value. The control module can control the first preset load value and the second preset load value applied to the tensile testing machine 31 and the torsion testing machine 32 according to the calibration requirement, improve the accuracy of calibration, and the first preset load value and the second preset load value can be determined in real time through the display module, which is intuitive and convenient.
[0041] Still further, the calibration tool further comprises a comparison module, the comparison module is electrically connected with the control module, the comparison module is used to compare the first measurement value and the first preset load value, and the comparison module is also used to compare the second measurement value and the second preset load value. The control module calibrates the first preset load value of the tensile testing machine 31 and the second preset load value of the torsion testing machine 32 according to the comparison result of the comparison module, so that the performance test of the tensile and torsion test platform 3 is accurately calibrated.
[0042] The embodiment provides a tensile test calibration, and the specific implementation steps include:
[0043] A1, install the tensile calibration tool 1, after adjusting the relative distance between the first mounting flange 311 and the second mounting flange 321 through the driving rod of the hydraulic cylinder, the first mounting flange 311 is connected and fixed with the second connecting flange 14, the second mounting flange 321 is connected and fixed with the first connecting flange 13, and the fixation of the tensile calibration tool 1 on the tensile and torsion test platform 3 is completed;
[0044] A2, set the first preset load value by the control module, the first preset load value is loaded slowly in steps (50kN, 100kN, 150kN, 200kN), each step load lasts at least 5 minutes to ensure that the tensile sensor 12 reading is stable; then load the tensile calibration tool 1, use the drive rod of the hydraulic cylinder to apply axial tensile load to the tensile calibration tool 1 through the control module, record the tensile sensor 12 reading as the first measurement value through the display, load to 200kN and complete the first measurement value record, then stop the hydraulic cylinder drive through the control module, unload the tensile calibration tool 1 to the empty load;
[0045] A3, compare the corresponding first preset load value and the first detection value one by one through the comparison module, if the first preset load value is equal to the first detection value, the tensile detection of the tensile torsion test platform 3 is perfect, if the first preset load value is not consistent with the first detection value, the first preset load value is corrected according to the first detection value. Exemplarily, if the error value of the first preset load value and the first detection value is ±5kN, the first preset load value is adjusted by ±5kN, and the calibration of the tensile performance test of the tensile torsion test platform 3 is completed.
[0046] A4, finally, the tensile calibration tool 1 is removed from the tensile torsion test platform 3, and the next performance test or calibration is prepared.
[0047] The embodiment also provides a torsion test calibration, and the specific implementation steps include:
[0048] B1, install the torsion calibration tool 2, adjust the relative distance between the first mounting flange 311 and the second mounting flange 321 through the drive rod of the hydraulic cylinder, then connect and fix the first mounting flange 311 and the third connecting flange 23 respectively, connect and fix the second mounting flange 321 and the fourth connecting flange 24, or connect the first mounting flange 311 and the fourth connecting flange 24, and connect the second mounting flange 321 and the third connecting flange 23, complete the fixation of the torsion calibration tool 2 on the tensile torsion test platform 3;
[0049] B2, set the second preset load value by the control module, the second preset load value is loaded slowly in steps (1000N·m, 2000N·m, 3000N·m, 4000N·m, 5000N·m), each step load lasts at least 5 minutes to ensure that the torsion sensor reading is stable; then load the torsion calibration tool 1, slowly apply the torsion load by using the rotating motor through the control module, record the torsion sensor reading as the second measurement value through the display, load to 5000N·m and complete the second measurement value record, then stop the rotating motor drive through the control module, unload the torsion calibration tool 2 to the empty load;
[0050] B3, the second preset load value and the second detection value are compared one by one by the comparison module, if the second preset load value is equal to the second detection value, the performance of the tensile torsion test platform 3 is perfect, if the second preset load value is not consistent with the second detection value, the second preset load value is corrected according to the second detection value.
[0051] B4, finally, the torsion calibration tool 2 is removed from the tensile torsion test platform 3, and is prepared for the next performance test or calibration.
[0052] The above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made without departing from the scope of the present application. Therefore, although the present application has been described in detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. A calibration fixture suitable for a tensile torsion testing platform, the tensile torsion testing platform comprising a tensile testing machine and a torsion testing machine arranged opposite to each other along a first direction, characterized in that, The calibration tool comprises a tensile calibration tool and a torsional calibration tool; The tensile calibration tool comprises a tensile rod, a tensile sensor, a first connecting flange and a second connecting flange, the tensile sensor is arranged on the outer periphery of the tensile rod, the first connecting flange and the second connecting flange are arranged at two ends of the tensile rod respectively, the first connecting flange is detachably connected with one driving end of the tensile testing machine and the torsional testing machine, and the second connecting flange is detachably connected with the other driving end of the tensile testing machine and the torsional testing machine. The torsional calibration tool comprises a torsional rod, a torque sensor, a third connecting flange and a fourth connecting flange, the torque sensor is arranged on the outer periphery of the torsional rod, the third connecting flange is detachably connected with one driving end of the tensile testing machine and the torsional testing machine, and the fourth connecting flange is detachably connected with the other driving end of the tensile testing machine and the torsional testing machine.
2. The calibration fixture suitable for a tensile torsion test platform of claim 1, wherein, The first connecting flange is connected to one end of the tensile rod through a shackle, the first connecting flange is provided with a first lifting ring, one end of the tensile rod is provided with a second lifting ring, and the first lifting ring is connected with the second lifting ring through the shackle.
3. The calibration fixture suitable for a tensile torsion test platform of claim 2, wherein, The shackle comprises a shackle body and a shackle pin, the shackle body passes through the first lifting ring, the top of the shackle body is provided with a shackle head on each side, the second lifting ring is located between the two shackle heads, and the shackle pin passes through the second lifting ring and the two shackle heads.
4. The calibration fixture suitable for a tensile torsion test platform of claim 3, wherein, The two shackle heads are threadedly connected with the shackle pin, or the shackle pin is provided with external threads, and the shackle pin is threadedly connected with a nut after passing through the second lifting ring and the two shackle heads.
5. The calibration fixture suitable for a tensile torsion test platform of claim 1, wherein, The display module is electrically connected with the tensile sensor and the torque sensor, and is used for displaying a first measurement value of the tensile sensor and a second measurement value of the torque sensor.
6. The calibration fixture suitable for a tensile torsion test platform of claim 5, wherein, The control module is electrically connected with the display module, the tensile testing machine and the torsional testing machine, is used for controlling the tensile testing machine to start and stop according to a first preset load value, is used for controlling the torsional testing machine to start and stop according to a second preset load value, and is used for displaying the first preset load value and the second preset load value.
7. The calibration fixture suitable for a tensile torsion test platform of claim 6, wherein, The comparison module is electrically connected with the control module, is used for comparing the first measurement value with the first preset load value, and is used for comparing the second measurement value with the second preset load value, and the control module calibrates the first preset load value of the tensile testing machine and the second preset load value of the torsional testing machine according to a comparison result of the comparison module.