A cable low temperature tensile test device

Abstract

The application relates to the technical field of cable tensile test, in particular to a cable low-temperature tensile test device, which comprises a device body, the device body comprises a driving piece, a left clamping assembly and a right clamping assembly for clamping two ends of a cable, the driving piece drives the left clamping assembly to move away from the right clamping assembly so that the cable is stretched, a detection assembly is installed on the device body, the detection assembly comprises an elastomer, a resistance strain gauge and a data collector, the elastomer is fixedly connected with one end of the right clamping assembly away from the left clamping assembly, and the elastomer is used for sensing stress of the right clamping assembly to cause elastic deformation. The elastomer of the application senses stress of the right clamping assembly and causes elastic deformation, the elastic deformation is converted into a detectable electric signal in combination with the resistance strain gauge, and after being processed by the data collector, the precise detection of stress conditions in the cable stretching process is realized, and the cable tensile test is prevented from being affected by the low-temperature factor.

Description

Technical Field

[0001] This application relates to the technical field of cable tensile testing, and in particular to a cable low-temperature tensile testing device. Background Technology

[0002] As a key component in fields such as power transmission and communication connections, cables often need to be used in low-temperature environments. Low temperatures can cause significant changes in the mechanical properties of cable materials, potentially leading to increased brittleness and decreased ductility. Low-temperature tensile tests can simulate the stress state of cables in low-temperature environments, assess key indicators such as tensile strength and elongation at break, and ensure the reliability of cables in extreme environments.

[0003] In the experiment, the tensile properties of the cable were demonstrated by a force value test sensor. The two ends of the cable were clamped by the left clamping component and the right clamping component, respectively. The force value test sensor was installed on the outside of the right clamping component. When the drive mechanism moved the left clamping component and the right clamping component away from each other, the cable was subjected to tensile force. The force value test sensor detected the change of force value in real time during the tensile process.

[0004] In existing low-temperature tensile testing devices, the right clamping assembly is located on the side of the device closest to the external environment. Due to the temperature difference between the low-temperature environment inside the low-temperature chamber and the outside, the connection between the sensor and the right clamping assembly is prone to condensation due to sudden temperature changes, which can then freeze into ice. As a result, the sensor cannot accurately collect force data during the tensile process, making it difficult to meet the accuracy and reliability requirements of the test.

[0005] Therefore, a low-temperature tensile testing device for cables is needed to solve the problem of test failure caused by the sensor being affected by the environment during the low-temperature tensile process. Utility Model Content

[0006] In order to enable the right clamping assembly and the sensor to be rigidly connected, and to ensure that the force value of the right clamping assembly is rigidly and stably transmitted to the sensor, so as to ensure that the sensor accurately detects the force value change in the low temperature environment, this application provides a cable low temperature tensile testing device.

[0007] This application provides a low-temperature tensile testing device for cables, which adopts the following technical solution: A low-temperature tensile testing device for cables includes a device body, which includes a driving component, a left clamping assembly and a right clamping assembly for clamping both ends of a cable. The driving component drives the left clamping assembly away from the right clamping assembly to stretch the cable. A detection assembly is mounted on the device body, which includes an elastic body, a resistance strain gauge, and a data acquisition device. The elastic body is fixedly connected to the end of the right clamping assembly away from the left clamping assembly and is used to sense the force applied to the right clamping assembly to induce elastic deformation. The resistance strain gauge is attached to one side of the elastic body and converts the elastic deformation of the elastic body into a resistance signal. The data acquisition device is mounted on the resistance strain gauge.

[0008] By adopting the above technical solution, the driving component drives the left clamping assembly away from the right clamping assembly to stretch the cable. The elastic body senses the force on the right clamping assembly and undergoes elastic deformation. The resistance strain gauge converts the elastic deformation of the elastic body into a resistance signal. The data acquisition device collects the electrical signal converted from the resistance change on the resistance strain gauge, thereby realizing the detection of the force during the cable stretching process and avoiding the influence of low temperature factors on the cable stretching test.

[0009] Optionally, a connector may be detachably mounted on the elastomer, and the connector may be locked and fixed to the right clamping assembly.

[0010] By adopting the above technical solution, the connector and the elastomer are detachably connected, and the elastomer is locked and fixed to the right clamping assembly through the connector, which facilitates the replacement, maintenance and testing of the elastomer.

[0011] Optionally, the elastomer has an arc-shaped groove for deformation of the elastomer at the connector.

[0012] By adopting the above technical solution, the arc groove can more easily deform with the elastic body at the fixing point of the connector, making it easier for the elastic body to accurately sense the force on the right clamping component.

[0013] Optionally, the right clamping assembly includes a right fixed clamping member and a right movable clamping member. One side of the right fixed clamping member is fixedly connected to the elastic body, and the right movable clamping member is detachably installed on the right fixed clamping member.

[0014] By adopting the above technical solution, the right movable clamp can be detachably installed on the right fixed clamp. By adjusting the distance between the right fixed clamp and the right movable clamp, it is convenient to install and remove cables, thereby improving the versatility and practicality of the device.

[0015] Optionally, the right clamping assembly further includes a first base, which is slidably mounted on the device body and fixedly connected to the side of the right fixed clamping member away from the right movable clamping member.

[0016] By adopting the above technical solution, the right clamping component can slide on the device body through the first base, reserving a certain amount of movement space for the right clamping component, and achieving buffer protection for the right clamping component and the device body when the cable breaks.

[0017] Optionally, a mounting plate is fixedly installed on the first base, one side of the mounting plate is fixedly connected to the side of the elastic body away from the right fixed clamping member, and the resistance strain gauge is clamped between the elastic body and the mounting plate.

[0018] By adopting the above technical solution, the mounting plate is fixedly connected to the elastomer and the resistance strain gauge is clamped and fixed, which can ensure the stable operation of the elastomer and the resistance strain gauge and improve the accuracy of data acquisition.

[0019] Optionally, both the right fixed clamp and the right movable clamp are provided with clamping surfaces facing each other, and the clamping surfaces are provided with multiple clamping teeth, the extension direction of which is perpendicular to the cable stretching direction.

[0020] By adopting the above technical solution, the clamping teeth can increase the friction between the cable and the right fixed clamp and the right movable clamp, preventing the cable from sliding on the right fixed clamp and the right movable clamp during the stretching process, and improving the accuracy of the cable tensile test.

[0021] Optionally, a slide rail is installed on the left clamping assembly, and the slide rail is slidably engaged with the device body.

[0022] By adopting the above technical solution, the slide rail and the device body slide together. When the drive component drives the left clamping component away from the right clamping component to stretch the cable, the movement of the left clamping component is smoother and more stable, ensuring the smooth progress of the cable stretching test.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The elastomer senses the force on the right clamping assembly and undergoes elastic deformation. Combined with the resistance strain gauge, the elastic deformation is converted into a detectable electrical signal. After processing by the data acquisition unit, the force on the cable during the tensile test can be accurately detected, avoiding the influence of low temperature on the cable tensile test. 2. The mounting plate's contact fixation of the resistance strain gauge and the arc-shaped groove's optimized guidance of the elastic body's deformation further improve the accuracy of the test data, providing a reliable basis for the analysis of test results; 3. The design of the clamping component sliding on the device body through the first base can buffer the instantaneous impact force through the sliding stroke when the cable breaks, reducing damage to the right clamping component and the device body. Attached Figure Description

[0024] Figure 1This is a structural schematic diagram of an embodiment of the present application, used to illustrate the overall structure of the device body; Figure 2 This is a partial exploded view of an embodiment of this application, used to illustrate the structure of the detection component and the mounting plate; Figure 3 This is a schematic diagram of the right clamping component in an embodiment of this application, used to illustrate the specific structure of the right clamping component; Figure 4 This is a schematic diagram of the structure of the left clamping component in an embodiment of this application, used to illustrate the specific structure of the left clamping component.

[0025] Reference numerals: 1. Device body; 111. Right slide groove; 112. Left slide groove; 2. Driving component; 3. Left clamping assembly; 311. Second base; 312. Left fixed clamping component; 313. Left movable clamping component; 314. Left bolt; 315. Second clamping surface; 316. Slide rail; 4. Right clamping assembly; 411. First base; 412. Right fixed clamping component; 413. Right movable clamping component; 414. Right bolt; 415. First clamping surface; 416. Mounting plate; 4161. Clearance hole; 5. Detection assembly; 511. Elastomer; 512. Through hole; 513. Connector; 514. Arc groove; 521. Resistance strain gauge; 531. Data acquisition unit. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0027] Example: A low-temperature tensile testing device for cables, reference Figure 1 and Figure 2The device includes a main body 1, which comprises a driving component 2, a left clamping assembly 3, and a right clamping assembly 4. The left clamping assembly 3 and the right clamping assembly 4 are used to fix the two ends of a cable, respectively. The left clamping assembly 3 is slidably mounted on the main body 1. The driving component 2 drives the left clamping assembly 3 to move horizontally away from the right clamping assembly 4, and the cable is gradually stretched as the left clamping assembly 3 moves. A detection assembly 5 is installed on the main body 1. The detection assembly 5 includes an elastic body 511, a strain gauge 521, and a data acquisition unit 531. In this embodiment, the elastic body 511 comprises a sheet-like metal structure that easily undergoes elastic deformation under stress. The elastic body 511 is fixedly connected to the end of the right clamping assembly 4 away from the left clamping assembly 3. During the cable stretching process, the right clamping assembly 4 is subjected to stress, and the elastic body 511 undergoes elastic deformation accordingly. The strain gauge 521 is attached to one side of the elastic body 511, and the strain gauge 521 converts the elastic deformation of the elastic body 511 into a resistance signal. The data acquisition unit 531 is fixedly connected to the resistance strain gauge 521 and is used to capture the electrical signal corresponding to the resistance change of the resistance strain gauge 521. The detection process is not affected by the low temperature environment, thereby realizing the accurate acquisition of force data during the cable tensioning process in the low temperature environment. The low temperature environment in this application refers to the low temperature working condition of -40℃ to -60℃.

[0028] refer to Figure 1 and Figure 3 The right clamping assembly 4 includes a first base 411, a right fixed clamping member 412, and a right movable clamping member 413. The right fixed clamping member 412 is fixedly installed on the first base 411, and the right movable clamping member 413 is slidably installed on the right fixed clamping member 412 along the height direction of the right fixed clamping member 412. The distance between the right movable clamping member 413 and the right fixed clamping member 412 can be adjusted, thereby facilitating the installation and removal of cables. The device body 1 is provided with a right sliding groove 111, and the first base 411 slides in cooperation with the right sliding groove 111. After the cable breaks, the first base 411 slides a distance along the right sliding groove 111 and stops, avoiding hard contact between the first base 411 and the device body 1, and reducing damage to the right clamping assembly 4 and the device body 1.

[0029] refer to Figure 1 and Figure 3 A right bolt 414 is threadedly connected to the right fixed clamp 412. One end of the right bolt 414 is rotatably connected to the right movable clamp 413. The right bolt 414 and the right fixed clamp 412 are threaded together, thereby driving the right movable clamp 413 to rise and fall, so as to clamp and disassemble the cable. The right fixed clamp 412 and the right movable clamp 413 have a first clamping surface 415 on one side of the cable clamping side. The first clamping surface 415 has evenly distributed clamping teeth. The extension direction of the clamping teeth is perpendicular to the cable stretching direction, thereby increasing the friction between the right fixed clamp 412, the right movable clamp 413 and the cable.

[0030] refer to Figure 2 and Figure 3 An elastomer 511 has a through hole 512 at its center, and a connector 513 is detachably connected to the through hole 512. In this embodiment, the connector 513 can be a bolt. The connector 513 passes through the elastomer 511 and is threadedly connected to the right fixed clamp 412. The elastomer 511 at the through hole 512 can undergo elastic deformation as the right fixed clamp 412 is subjected to force. An arc-shaped groove 514 is provided on the elastomer 511. There are two arc-shaped grooves 514 with opposite opening directions. The through hole 512 is located at the center of the two arc-shaped grooves 514. After the right fixed clamp 412 is subjected to force, the elastomer 511 at the through hole 512 is subjected to force through the connector 513. Even in low temperature environments, the deformation stability of the elastomer 511 can be guaranteed, ensuring accurate force data acquisition.

[0031] refer to Figure 1 and Figure 2 The resistance strain gauge 521 is fixedly attached to the side of the elastic body 511 away from the right fixed clamping member 412. The area of ​​the resistance strain gauge 521 is smaller than the area of ​​the elastic body 511. A mounting plate 416 is fixedly installed on the first base 411. The resistance strain gauge 521 is clamped between the mounting plate 416 and the elastic body 511. The connection between the elastic body 511 and the mounting plate 416 is located at the corner of the elastic body 511, so that the elastic body 511 in the area of ​​the central through hole 512 can undergo elastic deformation. A clearance hole 4161 is opened in the center of the mounting plate 416 to avoid the connector 513 on the elastic body 511.

[0032] refer to Figure 1 and Figure 4 The left clamping assembly 3 includes a second base 311, a left fixed clamping member 312, and a left movable clamping member 313. The left fixed clamping member 312 is fixedly installed on the second base 311, and the left movable clamping member 313 is slidably installed on the left fixed clamping member 312 along the height direction of the left fixed clamping member 312. The distance between the left movable clamping member 313 and the left fixed clamping member 312 can be adjusted, thereby facilitating the installation and removal of cables. A slide rail 316 is fixedly installed at the bottom end of the second base 311, and a left slide groove 112 is provided on the device body 1. The slide rail 316 and the left slide groove 112 slide in cooperation. In this embodiment, the driving member 2 includes a cylinder, and the output end of the driving member 2 is fixedly connected to the second base 311 to realize the overall stable displacement of the left clamping assembly 3.

[0033] refer to Figure 3 and Figure 4A left bolt 314 is threadedly connected to the left fixed clamp 312. One end of the left bolt 314 is rotatably connected to the left movable clamp 313. The left bolt 314 and the left fixed clamp 312 are threadedly engaged, thereby driving the left movable clamp 313 to rise and fall, realizing the adjustment of the distance between the left fixed clamp 312 and the left movable clamp 313. A second clamping surface 315 is provided on one side of the left fixed clamp 312 and the left movable clamp 313 that clamps the cable. Multiple clamping teeth are evenly distributed on the second clamping surface 315. The extension direction of the clamping teeth is perpendicular to the cable stretching direction, thereby increasing the friction between the left fixed clamp 312, the left movable clamp 313 and the cable.

[0034] The implementation principle of this application embodiment is as follows: the left clamping component 3 and the right clamping component 4 firmly clamp the two ends of the cable. The driving component 2 drives the left clamping component 3 to move and stretch the cable. The tension is transmitted to the elastic body 511 through the right fixed clamping component 412 and the connecting component 513 of the right clamping component 4. The through hole 512 area in the center of the elastic body 511 deforms under the guidance of the arc groove 514. The resistance strain gauge 521 converts the elastic deformation signal of the elastic body 511 into a resistance signal. Then, the data acquisition unit 531 captures the electrical signal corresponding to the resistance change of the resistance strain gauge 521, so as to realize the accurate acquisition of force data during the cable stretching process in a low temperature environment.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-temperature tensile testing device for cables, comprising a device body (1), the device body (1) comprising a driving member (2), a left clamping assembly (3) and a right clamping assembly (4) for clamping both ends of a cable, the driving member (2) driving the left clamping assembly (3) away from the right clamping assembly (4) to stretch the cable, characterized in that: The device body (1) is equipped with a detection component (5), which includes an elastic body (511), a resistance strain gauge (521), and a data acquisition device (531). The elastic body (511) is fixedly connected to the end of the right clamping component (4) away from the left clamping component (3). The elastic body (511) is used to sense the force on the right clamping component (4) to cause elastic deformation. The resistance strain gauge (521) is attached to one side of the elastic body (511) and converts the elastic deformation of the elastic body (511) into a resistance signal. The data acquisition device (531) is mounted on the resistance strain gauge (521).

2. The cable low-temperature tensile testing device according to claim 1, characterized in that: A connector (513) is detachably mounted on the elastomer (511), and the connector (513) is locked and fixed to the right clamping assembly (4).

3. The cable low-temperature tensile testing device according to claim 2, characterized in that: The elastic body (511) has an arc-shaped groove (514) for the elastic body (511) at the connector (513) to deform.

4. The cable low-temperature tensile testing device according to claim 1, characterized in that: The right clamping assembly (4) includes a right fixed clamping member (412) and a right movable clamping member (413). One side of the right fixed clamping member (412) is fixedly connected to the elastic body (511), and the right movable clamping member (413) is detachably installed on the right fixed clamping member (412).

5. The cable low-temperature tensile testing device according to claim 4, characterized in that: The right clamping assembly (4) further includes a first base (411), which is slidably mounted on the device body (1). The first base (411) is fixedly connected to the right fixed clamping member (412) on the side away from the right movable clamping member (413).

6. The cable low-temperature tensile testing device according to claim 5, characterized in that: An mounting plate (416) is fixedly installed on the first base (411). One side of the mounting plate (416) is fixedly connected to the side of the elastic body (511) away from the right fixed clamp (412). The resistance strain gauge (521) is clamped between the elastic body (511) and the mounting plate (416).

7. The cable low-temperature tensile testing device according to claim 4, characterized in that: Both the right fixed clamp (412) and the right movable clamp (413) are provided with a first clamping surface (415) facing each other. The first clamping surface (415) is provided with a plurality of clamping teeth, and the extension direction of the clamping teeth is perpendicular to the cable stretching direction.

8. The cable low-temperature tensile testing device according to claim 1, characterized in that: The left clamping assembly (3) is equipped with a slide rail (316), which slides in cooperation with the device body (1).

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