A cable tensile testing device

Abstract

This invention belongs to the field of cable tensile testing technology, specifically a cable tensile testing device, including a workbench. Two cabinet doors are rotatably connected to the front end of the workbench. A fixed frame is installed on the upper surface of the workbench. Grooves are formed on both walls of the inner cavity of the fixed frame, and a tensile testing drive assembly is installed within the grooves. This invention solves the problem that existing tensile testing devices cannot monitor the tensile force borne by the cable in real time during the tensile process, thus failing to detect the amount of tensile force (in N) the cable can withstand without deformation. Furthermore, the electrically driven clamping and fixing method is prone to cylinder failure when the electric push rod is subjected to overload, thus affecting the efficiency of cable tensile testing.

Description

Technical Field

[0001] This invention belongs to the field of cable tensile testing technology, specifically a cable tensile testing device. Background Technology

[0002] Wires and cables are wire products used to transmit electrical (magnetic) energy, information, and realize electromagnetic energy conversion. They can be defined as: an assembly consisting of one or more insulated wire cores, and their respective possible covering layers, overall protective layer, and outer sheath. Cables may also have additional uninsulated conductors. Currently, before being put into use after production, wires and cables need to undergo tensile testing to determine their tensile properties so that they can be better used in subsequent applications.

[0003] A patent with publication number CN115541392B discloses a tensile testing device for fire-resistant cable cores. During operation, the device supplies circuitry through the cable core. When the cable core breaks, the circuit connection is stopped, causing the electromagnet and hydraulic cylinder to cease operation. This prevents the clamp from continuing to move the cable core, which would affect the detection of the cable core's tensile length and ensure accurate determination of the cable core's tensile strength. In operation, only a simple circuit connection is needed to ensure the electromagnet and hydraulic cylinder stop operating after the cable core breaks, guaranteeing the accuracy of the tensile strength test. Furthermore, it eliminates the need for multiple complex electrical control devices, resulting in lower manufacturing costs and a lower failure rate due to its simple structure.

[0004] The above-mentioned solution still has some problems in practical application. It usually uses an electric push rod to drive the clamps to clamp and fix both ends of the cable, and then drives the electric push rod to move, which in turn drives the clamps to pull one end of the cable. After the cable undergoes stretching and deformation and breaks, the tensile strength of the cable is judged, thereby realizing the tensile performance test of the cable. However, this tensile test cannot monitor the tensile force borne by the cable in real time during the stretching process, so as to detect how many N of tensile force the cable will not deform. Moreover, the electric drive clamping and fixing method is prone to cylinder explosion when the electric push rod is subjected to overload, which affects the efficiency of cable tensile test.

[0005] Therefore, the present invention provides a cable tensile strength testing device. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The cable tensile testing device of the present invention includes a workbench, two cabinet doors are rotatably connected to the front end of the workbench, a fixed frame is installed on the upper surface of the workbench, grooves are opened on both walls of the inner cavity of the fixed frame, and a tensile testing drive component is provided in the inner cavity of the groove.

[0008] Furthermore, the tensile testing drive assembly includes two fixed cylinders fixed to the bottom of the groove cavity. Each of the two fixed cylinders is rotatably connected to a threaded rod. A sliding plate is threadedly connected to the outside of the threaded rod. A fixed block is slidably connected to the lower end of the sliding plate. A testing box is installed on the upper surface of the sliding plate for real-time monitoring of the cable pulling test results.

[0009] A support frame is installed at the bottom of the inner cavity of the fixing frame, and an L-shaped fixing block is fixedly connected to the upper end of the support frame. A semi-circular toothed block is fixedly connected to the upper part of the inner cavity of the L-shaped fixing block, and teeth are evenly arranged on the outside of the semi-circular toothed block to increase the friction of the cable.

[0010] Preferably, an electric push rod is provided inside the lower end of the support frame. The output shaft end of the electric push rod passes through the support frame and is fixed to a U-shaped clamping block. The inner wall of the U-shaped clamping block is evenly provided with toothed grooves for meshing with the semi-circular toothed block to increase the clamping force of the cable.

[0011] Preferably, a telescopic column is fixedly connected to the upper end of the fixing block, and the telescopic column is slidably connected to the sliding plate. A bidirectional threaded rod is rotatably connected to the inner cavity of the fixing block. One end of the bidirectional threaded rod passes through the fixing block and is fixedly connected to a crank. Two clamping blocks are externally threaded to the bidirectional threaded rod, and a rack is provided between the two clamping blocks to increase the clamping force of the cable.

[0012] Preferably, the inner cavity of the detection box has two squeezing blocks slidably connected, and a spring is fixed between the two squeezing blocks. One end of the spring is fixed to the inner wall of the detection box, and a traction rope is fixed to one end of the squeezing block. A cable routing hole is opened in the lower end of the detection box, and the traction rope passes through the cable routing hole and is fixed to the telescopic column.

[0013] Preferably, a protective cover is installed on the upper surface of the workbench, a control console is installed on the front surface of the protective cover, and an adjustment knob is provided on the front surface of the protective cover at the lower part of the control console for adjusting the sliding speed of the slide plate.

[0014] Preferably, the inner cavity of the detection box is equipped with a tension sensor, which is used to accurately measure the deformation and tension of the spring in real time. The tension sensor is electrically connected to the control console via a wire.

[0015] Preferably, two observation windows are slidably connected inside the front end of the protective cover. The upper and lower walls of the front end cavity of the protective cover are provided with sliding grooves, and the two observation windows are slidably connected in the sliding groove cavity. A handle is fixed to one side of the front end face of each observation window. Multiple strong magnets are provided between the two observation windows to attract and fix the observation windows and seal the protective cover. The observation windows are made of transparent acrylic sheets and are used to observe the changes in cable tension during the testing process.

[0016] Preferably, a transmission groove is provided inside the lower end of the fixed frame, and a transmission shaft is rotatably connected to the inner cavity of the transmission groove. Two second bevel gears are fixedly connected to the two outer ends of the transmission shaft, and the two second bevel gears are meshed with a first bevel gear. One end of the first bevel gear is fixedly connected to a threaded rod.

[0017] Preferably, a transmission bevel gear is rotatably connected to the bottom of the inner cavity of the transmission groove. One end of the transmission bevel gear passes through the fixed frame and has a cross slot. The transmission bevel gear is meshed with a driven bevel gear, and the driven bevel gear is fixedly connected to the outside of the transmission shaft.

[0018] Preferably, a servo motor is installed on the upper wall of the inner cavity of the worktable, and the output shaft end of the servo motor passes through the worktable and is fixedly connected to a cross-shaped insert, which is engaged with a cross-shaped slot to drive the transmission bevel gear to rotate.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The cable tensile testing device of this invention involves pulling two observation windows by holding a handle, causing them to slide closer together within a groove cavity, thus bringing the two observation windows into contact. Simultaneously, the two observation windows are secured by a strong magnetic attraction. Both observation windows are made of transparent acrylic sheets. Therefore, during cable tensile testing, if the cable breaks due to overload, a protective cover, along with the two observation windows, can protect the mounting frame, preventing the broken cable from posing a safety hazard to the operator. This improves the safety and practicality of the cable tensile testing device. It also solves the problem that existing cable tensile testing devices typically use two clamps to hold and fix both ends of the cable before pulling it to straighten and test its tensile strength. However, if the cable tensile testing device lacks a protective mechanism, the cable may break due to overload or one end of the cable may detach from the clamps, causing the cable to break out of the testing device and posing a safety hazard to the operator.

[0021] 2. The cable tensile testing device of the present invention involves clamping and fixing one end of the cable between clamping blocks, then passing the other end of the cable through the inner cavity of an L-shaped fixing block and winding it around a semi-circular toothed block. Simultaneously, a U-shaped clamping block is driven to clamp the cable, and a sliding plate is driven to move the fixing block upwards, thereby pulling the cable into a taut state. The fixing block then causes a telescopic column to slide inside the sliding plate, simultaneously pulling a traction rope to compress a spring using a compression block. Furthermore, a tensile sensor is installed inside the testing box. When the compression block compresses the spring and causes elastic deformation, the strain gauges attached to the surface of the elastic body will... The cable undergoes deformation, which in turn changes its resistance. This change in resistance is then converted into voltage or current by a corresponding measuring circuit and transmitted to the control console. The control console then uses a computer to calculate the magnitude of the tensile force based on the change in the measured resistance value, and displays the result on the console. This measurement method offers high accuracy, fast response, and good stability, thereby improving the efficiency of cable tensile testing. It solves the problem that existing cable tensile testing devices cannot monitor in real time whether the cable elongates after being subjected to a specified tensile force, thus failing to determine the standard of the cable's tensile strength.

[0022] 3. The cable tensile testing device of the present invention involves sliding two observation windows closer to each other within a chute cavity. Simultaneously, the two observation windows are secured by strong magnetic attraction. If the cable breaks under overload, a protective cover, along with the two observation windows, can protect the mounting frame, preventing the broken cable from posing a safety hazard to operators. This improves the safety and practicality of the cable tensile testing device. It also solves the problem that existing cable tensile testing devices typically use two clamps to hold and fix both ends of the cable before pulling it to straighten and test its tensile strength. However, if the cable tensile testing device lacks a protective mechanism, the cable may break under overload or one end may detach from the clamps during the tensile testing, causing the cable to break out of the testing device and posing a safety hazard to operators. Attached Figure Description

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the overall structure of the main view of the present invention;

[0025] Figure 2 This is a partial cross-sectional structural diagram of the internal structure of the fixing frame of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the fixing frame of the present invention in half section;

[0027] Figure 4 This is a schematic diagram of the internal structure of the slide plate of the present invention in half section;

[0028] Figure 5 This is a schematic diagram of the half-section structure of the workbench of the present invention;

[0029] Figure 6 This is a schematic diagram of the overall assembly structure of the threaded rod of the present invention;

[0030] Figure 7 This is a schematic diagram of the half-section structure of the L-shaped fixing block of the present invention;

[0031] In the diagram: 1. Workbench; 2. Cabinet door; 3. Protective cover; 4. Observation window; 5. Handle; 6. Strong magnet; 7. Control console; 8. Adjustment knob; 9. Slide rail; 10. Fixing bracket; 11. Groove; 12. Threaded rod; 13. Slide plate; 14. Detection box; 15. Fixing block; 16. Crank handle; 17. Clamping block; 18. Fixing cylinder; 19. Support frame; 20. L-shaped fixing block; 21. Semi-circular toothed block; 22. U-shaped clamping block; 23. Electric push rod; 24. Bidirectional threaded rod; 25. Telescopic column; 26. Traction rope; 27. Compression block; 28. Spring; 29. ​​Cable routing hole; 30. First bevel gear; 31. Second bevel gear; 32. Drive shaft; 33. Drive groove; 34. Driven bevel gear; 35. Drive bevel gear; 36. Cross slot; 37. Servo motor; 38. Cross insert. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Example 1

[0034] like Figures 1 to 7 As shown, the cable tensile testing device of the present invention includes a workbench 1, two cabinet doors 2 are rotatably connected to the front end of the workbench 1, a fixed frame 10 is installed on the upper surface of the workbench 1, and grooves 11 are provided on the two walls of the inner cavity of the fixed frame 10. A tensile testing drive component is provided in the inner cavity of the grooves 11.

[0035] Furthermore, the tensile testing drive assembly includes two fixed cylinders 18 fixed to the bottom of the inner cavity of the groove 11. The inner cavities of the two fixed cylinders 18 are rotatably connected to threaded rods 12. The threaded rods 12 are externally threaded to a sliding plate 13. A fixed block 15 is slidably connected to the lower end of the sliding plate 13. A testing box 14 is installed on the upper surface of the sliding plate 13. The testing box 14 can be a tensile testing box of model SBT640-1000N, used to monitor the test results of cable tensile force in real time.

[0036] A support frame 19 is installed at the bottom of the inner cavity of the fixing frame 10. An L-shaped fixing block 20 is fixedly connected to the upper end of the support frame 19. A semi-circular toothed block 21 is fixedly connected to the upper part of the inner cavity of the L-shaped fixing block 20. The semi-circular toothed block 21 has teeth evenly arranged on its outer side to increase the friction of the cable.

[0037] Specifically, in existing technologies, an electric actuator is typically used to drive a clamp to hold and fix both ends of the cable. The electric actuator is then driven to move, causing the clamp to pull one end of the cable, thus tautning the cable. Once the cable is taut, the control console controls the drive mechanism to continuously pull the cable and apply tension. If the cable breaks after a specified tension, the cable tension test is complete. However, this method of clamping and fixing the cable is prone to cylinder failure if the electric actuator is overloaded by the tension. Furthermore, if the cable is overloaded, it is easy for the cable to fall out of the clamp, thus affecting the accuracy of the cable tension test.

[0038] This invention involves installing the cable requiring tensile testing at the lower end of a fixed block 15, with the other end installed inside an L-shaped fixed block 20, where it is wound and fixed to a semi-circular toothed block 21. Then, a threaded rod 12 is driven to rotate, causing the threaded rod 12 to drive a sliding plate 13 upwards. Simultaneously, the sliding plate 13 drives the fixed block 15 to move synchronously, thus causing the fixed block 15 to pull the cable against the L-shaped fixed block 20, creating a tensile force. Furthermore, when the sliding plate 13 is moved upwards by the threaded rod 12, the cable pulls the fixed block 15 to slide inside the sliding plate 13. The length of the fixed block 15 sliding inside the sliding plate 13 is ten centimeters, and this ten centimeters can withstand a maximum tensile force of 1000N. When the fixing block 15 pulls the cable upward, the cable is in a taut state. Then, the cable will pull the fixing block 15 to slide to the bottom of the inner cavity of the slide plate 13. Then, the drive threaded rod 12 stops and drives the slide plate 13 to move upward. At the same time, the detection box 14 monitors the position of the fixing block 15 in the inner cavity of the slide plate 13 in real time. If the cable elongates after being subjected to a tensile force of 1000N within a certain period of time, the fixing block 15 will slide into the inner cavity of the slide plate 13 and move upward. Then, the detection box 14 determines the elongation of the cable by measuring the distance the fixing block 15 slides in the inner cavity of the slide plate 13. Based on the elongation of the cable, the standard tensile force that the cable can withstand is calculated, thereby solving the above problem.

[0039] like Figure 1 , Figure 2 and Figure 7 As shown, an electric push rod 23 is provided inside the lower end of the support frame 19. The output shaft end of the electric push rod 23 passes through the support frame 19 and is fixed to a U-shaped clamping block 22. The inner wall of the U-shaped clamping block 22 is evenly provided with toothed grooves for meshing with the semi-circular toothed block 21 to increase the clamping force of the cable.

[0040] Specifically, after clamping and fixing one end of the cable with the fixing block 15, the other end of the cable is passed through the inner cavity of the L-shaped fixing block 20 and wrapped around the semi-circular toothed block 21 twice. Then, the electric push rod 23 is activated to drive the U-shaped clamping block 22 to move upward. The inner wall of the U-shaped clamping block 22 is evenly provided with toothed grooves, and the toothed grooves also mesh with the semi-circular toothed block 21. After the U-shaped clamping block 22 is driven to slide to the outside of the semi-circular toothed block 21, the cable will be clamped, thereby improving the installation and disassembly efficiency during cable tensile testing.

[0041] like Figure 1 , Figure 2 and Figure 4 As shown, a telescopic column 25 is fixedly connected to the upper end of the fixing block 15, and the telescopic column 25 is slidably connected to the slide plate 13. A bidirectional threaded rod 24 is rotatably connected to the inner cavity of the fixing block 15. One end of the bidirectional threaded rod 24 passes through the fixing block 15 and is fixedly connected to a crank 16. Two clamping blocks 17 are externally threaded to the bidirectional threaded rod 24, and a rack is provided between the two clamping blocks 17 to increase the clamping force of the cable.

[0042] Specifically, before conducting a tensile test on the cable, one end of the cable is placed between the clamping blocks 17, and the crank handle 16 is driven to rotate, which in turn drives the bidirectional threaded rod 24 to rotate. This causes the two clamping blocks 17 to move closer to each other via the threaded drive. Each clamping block 17 is equipped with a rack, which allows the clamping blocks 17 to clamp and fix one end of the cable using the rack. The rack is horizontally positioned, which increases the friction between the clamping blocks 17 and the cable, preventing the cable from falling out between the clamping blocks 17 during the tensile test. This would prevent the cable from being stretched and suddenly falling out of the clamping blocks 17, causing a safety hazard.

[0043] like Figure 1 , Figure 3 and Figure 4 As shown, two squeezing blocks 27 are slidably connected to the inner cavity of the detection box 14, and a spring 28 is fixed between the two squeezing blocks 27. One end of the spring 28 is fixed to the inner wall of the detection box 14, and a traction rope 26 is fixed to one end of the squeezing block 27. A cable routing hole 29 is opened in the lower end of the detection box 14, and the traction rope 26 passes through the cable routing hole 29 and is fixed to the telescopic column 25.

[0044] like Figure 1 As shown, a protective cover 3 is installed on the upper surface of the workbench 1, and a control console 7 is installed on the front surface of the protective cover 3. An adjustment knob 8 is provided on the front surface of the protective cover 3 at the lower part of the control console 7 for adjusting the sliding speed of the slide plate 13.

[0045] like Figure 1 , Figure 3 and Figure 4As shown, a tension sensor is installed inside the detection box 14, and the tension sensor is used to measure the deformation and tension of the spring 28 in real time with precision. The tension sensor is electrically connected to the control console 7 through a wire.

[0046] Specifically, before performing tensile testing on the cable, one end of the cable is placed between the clamping blocks 17, and the crank handle 16 is rotated, which in turn rotates the bidirectional threaded rod 24. This causes the two clamping blocks 17 to move closer together via the threaded drive. Each clamping block 17 has a rack between it, allowing the clamping blocks 17 to clamp and fix one end of the cable. Then, the other end of the cable is passed through the inner cavity of the L-shaped fixing block 20 and wound around the semi-circular toothed block 21. Simultaneously, the electric push rod 23 is activated to drive the U-shaped clamping block 22 upwards. The inner wall is evenly grooved, and the grooves mesh with the semi-circular toothed block 21. When the U-shaped clamping block 22 slides to the outside of the semi-circular toothed block 21, it clamps the cable. Then, the threaded rod 12 rotates, causing the threaded rod 12 to drive the sliding plate 13 upwards. Simultaneously, the sliding plate 13 drives the fixed block 15 to move synchronously, so that the fixed block 15, in conjunction with the semi-circular toothed block 21, pulls the cable into a taut state. Then, the sliding plate 13 continues to drive the fixed block 15 upwards, causing the telescopic column 25 to slide inside the sliding plate 13. Simultaneously, the telescopic column 25 pulls the traction rope 26 downward, causing the traction rope 26 to pull the compression block 27 to slide closer to each other within the inner cavity of the detection box 14. This causes the compression block 27 to compress the spring 28, which can withstand a tensile force of 1000N. The detection box 14 is equipped with a tensile sensor. When the compression block 27 compresses the spring 28, causing elastic deformation, the strain gauge attached to the surface of the elastic body deforms accordingly, changing its resistance value. This resistance change is then converted into voltage or current by a corresponding measurement circuit and transmitted to the control console 7. The control console 7 calculates the tensile force based on the change in resistance value and displays the result. This measurement method offers high accuracy, fast response, and good stability, thereby improving the efficiency of cable tensile testing. It solves the problem of existing cable tensile testing devices being unable to monitor in real time whether the cable elongates after being subjected to a specified tensile force, thus hindering the determination of the cable's tensile strength.

[0047] Example 2

[0048] like Figure 1As shown, there are two observation windows 4 slidably connected inside the front end of the protective cover 3. The upper and lower walls of the front end inner cavity of the protective cover 3 are provided with grooves 9, and the two observation windows 4 are slidably connected in the inner cavity of the grooves 9. A handle 5 is fixed to one side of the front end face of each observation window 4. Multiple strong magnets 6 are provided between the two observation windows 4 to attract and fix the observation windows 4 and seal the protective cover 3. The observation windows 4 are made of transparent acrylic sheet and are used to observe the changes in cable tension during the test.

[0049] Specifically, during the cable tensile testing process, by holding the handle 5, the two observation windows 4 are slid closer together within the inner cavity of the slide groove 9, thus bringing the two observation windows 4 into contact with each other. Simultaneously, the two observation windows 4 are secured by a strong magnetic magnet 6. Both observation windows 4 are made of transparent acrylic sheets. Therefore, during the cable tensile testing process, if the cable breaks due to overload, the protective cover 3, in conjunction with the two observation windows 4, can cover and protect the fixing frame 10, preventing the broken cable from posing a safety hazard to the operator. This improves the safety and practicality of the cable testing device and solves the problem that existing cable tensile testing devices typically use two clamps to hold and fix both ends of the cable, then pull the cable to straighten and test its tensile strength. However, if the cable tensile testing device lacks a protective mechanism, the cable may break due to overload or one end of the cable may detach from the clamps during the tensile testing, causing the cable to break out of the testing device and posing a safety hazard to the operator.

[0050] like Figure 3 , Figure 5 and Figure 6 As shown, a transmission groove 33 is provided inside the lower end of the fixed frame 10. A transmission shaft 32 is rotatably connected to the inner cavity of the transmission groove 33. Two second bevel gears 31 are fixedly connected to the two ends of the transmission shaft 32. The two second bevel gears 31 are meshed with a first bevel gear 30. One end of the first bevel gear 30 is fixedly connected to the threaded rod 12.

[0051] like Figure 3 , Figure 5 and Figure 6 As shown, a transmission bevel gear 35 is rotatably connected to the bottom of the inner cavity of the transmission groove 33. One end of the transmission bevel gear 35 passes through the fixed frame 10 and has a cross slot 36. The transmission bevel gear 35 is meshed with a driven bevel gear 34, and the driven bevel gear 34 is externally fixed to the transmission shaft 32.

[0052] Specifically, after the two ends of the cable to be tested are clamped and fixed, the drive bevel gear 35 is rotated, which in turn meshes with the driven bevel gear 34 to rotate. At the same time, the driven bevel gear 34 drives the drive shaft 32 to rotate, which in turn drives the two second bevel gears 31 to rotate. During the rotation of the two second bevel gears 31, they mesh with the first bevel gear 30 to rotate, which in turn drives the threaded rod 12 to rotate. Then, the threaded rod 12 drives the sliding plate 13 to move upward. At the same time, the sliding plate 13 drives the fixed block 15 to move synchronously, which in turn drives the cable to move upward to straighten it, thereby performing tensile testing. Moreover, the threaded rod 12 drives the sliding plate 13 to move upward and pull the cable to perform tensile testing, which can improve the stability and accuracy of cable tensile testing.

[0053] like Figure 1 , Figure 5 and Figure 6 As shown, a servo motor 37 is installed on the upper wall of the inner cavity of the worktable 1. The output shaft end of the servo motor 37 passes through the worktable 1 and is fixedly connected to a cross-shaped plug 38. The cross-shaped plug 38 is inserted and engaged with the cross-shaped slot 36 to drive the transmission bevel gear 35 to rotate.

[0054] Specifically, after the two ends of the cable to be tested are clamped and fixed, the servo motor 37 is started to drive the cross plug 38 to rotate. At the same time, the cross plug 38, together with the cross slot 36, drives the transmission bevel gear 35 to rotate, which in turn drives the slide plate 13 to drive the cable to perform tensile testing.

[0055] The working principle is as follows: the cable to be tested for tensile strength is installed at the lower end of the fixed block 15, and the other end is installed in the inner cavity of the L-shaped fixed block 20, so that it is wound and fixed with the semi-circular toothed block 21. Then, the threaded rod 12 is driven to rotate, which causes the threaded rod 12 to drive the sliding plate 13 to move upward. At the same time, the sliding plate 13 drives the fixed block 15 to move synchronously, thereby causing the fixed block 15 to pull the cable and the L-shaped fixed block 20 to form a tensile force. Moreover, when the sliding plate 13 is controlled to move upward by the threaded rod 12, the cable will pull the fixed block 15 to slide inside the sliding plate 13. The length of the fixed block 15 sliding inside the sliding plate 13 is 10 centimeters, and this 10 centimeters can withstand a maximum of 1000N. The cable is taut when the fixed block 15 pulls it upward. The cable then pulls the fixed block 15 to slide to the bottom of the inner cavity of the slide plate 13. The drive threaded rod 12 stops and drives the slide plate 13 upward. At the same time, the detection box 14 monitors the position of the fixed block 15 in the inner cavity of the slide plate 13 in real time. If the cable elongates after being subjected to a tensile force of 1000N for a certain period of time, the fixed block 15 will slide into the inner cavity of the slide plate 13 and move upward. The detection box 14 then calculates the elongation of the cable by measuring the distance the fixed block 15 slides in the inner cavity of the slide plate 13. Based on the elongation of the cable, the standard tensile force that the cable can withstand is calculated.

[0056] Before conducting a tensile test on the cable, one end of the cable is placed between the clamping blocks 17, and the crank 16 is rotated, causing the bidirectional threaded rod 24 to rotate. This causes the two clamping blocks 17 to move closer together via the threaded drive. Each clamping block 17 has a rack between it, allowing the clamping blocks 17 to clamp and fix one end of the cable. The other end of the cable is then passed through the inner cavity of the L-shaped fixing block 20 and wound around the semi-circular toothed block 21. Simultaneously, the electric push rod 23 is activated to drive the U-shaped clamping block 22 upward. The inner wall of the U-shaped clamping block 22 has evenly spaced grooves that mesh with the semi-circular toothed block 21. Once the U-shaped clamping block 22 slides outside the semi-circular toothed block 21, it clamps the cable. The threaded rod 12 is then driven to rotate, causing the threaded drive sliding plate 13 to move upward. Simultaneously, the sliding plate 13 drives the fixing block 15 to move synchronously, so that the fixing block 15, in conjunction with the semi-circular toothed block 21, pulls the cable into a taut state. The sliding plate 13 is then continuously driven... The fixed block 15 moves upward, which in turn causes the telescopic column 25 to slide inside the slide plate 13. At the same time, the telescopic column 25 pulls the traction rope 26 downward, causing the traction rope 26 to pull the compression block 27 to slide closer to each other in the inner cavity of the detection box 14. This causes the compression block 27 to compress the spring 28, which can withstand a tensile force of 1000N. The detection box 14 is equipped with a tensile sensor. When the compression block 27 compresses the spring 28 and causes elastic deformation, the resistance strain gauge attached to the surface of the elastic body will also deform, thereby changing its resistance value. This resistance change is then converted into voltage or current by the corresponding measurement circuit and transmitted to the control console 7. The control console 7 calculates the tensile force based on the change in the measured resistance value and displays it on the control console 7. This measurement method has high measurement accuracy, fast response speed, and good stability, thereby improving the efficiency of cable tensile force detection.

[0057] During the tensile testing of the cable, by holding the handle 5, the two observation windows 4 are slid and moved closer to each other in the inner cavity of the slide groove 9, so that the two observation windows 4 fit together. At the same time, the two observation windows 4 are fixed by strong magnetic magnets 6. Both observation windows 4 are made of transparent acrylic sheets. Therefore, if the cable breaks under overload during the tensile testing, the protective cover 3 can be used in conjunction with the two observation windows 4 to cover and protect the fixing frame 10, preventing the broken cable from causing safety hazards to the operators, thus improving the safety and practicality of the cable waste detection device.

[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable tensile strength testing device, characterized in that: Includes a workbench (1), with two cabinet doors (2) rotatably connected inside the front end of the workbench (1), and a fixed frame (10) installed on the upper surface of the workbench (1). The two walls of the inner cavity of the fixed frame (10) are provided with grooves (11), and a tensile force detection drive assembly is provided in the inner cavity of the grooves (11). The tensile force detection drive assembly includes two fixed cylinders (18) fixed to the bottom of the inner cavity of the groove (11). The inner cavities of the two fixed cylinders (18) are rotatably connected to threaded rods (12). The threaded rods (12) are externally threaded to a sliding plate (13). A fixed block (15) is slidably connected to the lower end of the sliding plate (13). A detection box (14) is installed on the upper surface of the sliding plate (13). The detection box (14) is used to monitor the tensile force of the cable. A support frame (19) is installed at the bottom of the inner cavity of the fixed frame (10). An L-shaped fixing block (20) is fixed to the upper end of the support frame (19). A semi-circular toothed block (21) is fixed to the upper part of the inner cavity of the L-shaped fixing block (20), and teeth are evenly arranged on the outside of the semi-circular toothed block (21) to increase the friction of the cable. The upper end of the fixed block (15) is fixedly connected to a telescopic column (25), and the telescopic column (25) is slidably connected to the slide plate (13). The inner cavity of the fixed block (15) is rotatably connected to a bidirectional threaded rod (24). One end of the bidirectional threaded rod (24) passes through the fixed block (15) and is fixedly connected to a crank handle (16). The external thread of the bidirectional threaded rod (24) is connected to two clamping blocks (17), and a rack is provided between the two clamping blocks (17) to increase the clamping force of the cable. The inner cavity of the detection box (14) is slidably connected to two compression blocks (27), and a spring (28) is fixed between the two compression blocks (27). One end of the spring (28) is fixed to the inner wall of the detection box (14), and a traction rope (26) is fixed to one end of the compression block (27). A cable routing hole (29) is opened in the lower end of the detection box (14), and the traction rope (26) passes through the cable routing hole (29) and is fixed to the telescopic column (25).

2. The cable tensile strength testing device according to claim 1, characterized in that: An electric push rod (23) is provided inside the lower end of the support frame (19). The output shaft end of the electric push rod (23) passes through the support frame (19) and is fixed to a U-shaped clamp (22). The inner wall of the U-shaped clamp (22) is evenly provided with tooth grooves for meshing with the semi-circular tooth block (21) to increase the clamping force of the cable.

3. The cable tensile strength testing device according to claim 1, characterized in that: The workbench (1) shown is equipped with a protective cover (3) on its upper surface. A control panel (7) is installed on the front surface of the protective cover (3). An adjustment knob (8) is provided on the front surface of the protective cover (3) at the lower part of the control panel (7) to adjust the sliding speed of the slide plate (13).

4. The cable tensile strength testing device according to claim 1, characterized in that: The inner cavity of the detection box (14) is equipped with a tension sensor, which is used to measure the deformation and tension of the spring (28) in real time with precision. The tension sensor is electrically connected to the control console (7) through a wire.

5. The cable tensile strength testing device according to claim 3, characterized in that: The protective cover (3) has two observation windows (4) slidably connected inside the front end. The upper and lower walls of the front end cavity of the protective cover (3) are provided with grooves (9), and the two observation windows (4) are slidably connected in the grooves (9). A handle (5) is fixed to one side of the front end face of each observation window (4). Multiple strong magnets (6) are provided between the two observation windows (4) to attract and fix the observation windows (4) and seal the protective cover (3). The observation windows (4) are made of transparent acrylic sheets and are used to observe the changes in cable tension during the testing process.

6. The cable tensile strength testing device according to claim 1, characterized in that: The lower end of the fixed frame (10) is provided with a transmission groove (33). The inner cavity of the transmission groove (33) is rotatably connected to a transmission shaft (32). Two second bevel gears (31) are fixedly connected to the two outer ends of the transmission shaft (32), and the two second bevel gears (31) are meshed with a first bevel gear (30). One end of the first bevel gear (30) is fixedly connected to the threaded rod (12).

7. The cable tensile strength testing device according to claim 6, characterized in that: The bottom of the inner cavity of the transmission groove (33) is rotatably connected to a transmission bevel gear (35). One end of the transmission bevel gear (35) passes through the fixed frame (10) and has a cross slot (36). The transmission bevel gear (35) is meshed with a driven bevel gear (34), and the driven bevel gear (34) is fixedly connected to the outside of the transmission shaft (32).

8. The cable tensile strength testing device according to claim 1, characterized in that: A servo motor (37) is installed on the upper wall of the inner cavity of the workbench (1). The output shaft end of the servo motor (37) passes through the workbench (1) and is fixedly connected to a cross plug (38). The cross plug (38) is inserted and engaged with the cross slot (36) to drive the transmission bevel gear (35) to rotate.

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