A tensile property detection device for cable production

Abstract

The application relates to the field of cable detection, and particularly discloses a tensile property detection equipment for cable production, which comprises a supporting base, and two clamping devices are arranged on the supporting base and are both arranged on the supporting base. The clamping device comprises a supporting pipe which is rotatably arranged on the supporting base, a plurality of metal aperture mechanisms which are coaxially arranged in the supporting pipe, an elastic clamping pipe which is coaxially arranged in the plurality of metal aperture mechanisms and is connected with aperture blades of the metal aperture mechanisms, and a tensile force adjusting device which is arranged on the supporting base between the two clamping devices and is used for pulling the cable and detecting the tensile force data that can be borne by the cable. The application can be adapted to cables of various sizes and can disperse the clamping stress of the contact part between the clamp and the cable.

Description

Technical Field

[0001] This application relates to the field of cable testing, and in particular to a tensile performance testing device for cable production. Background Technology

[0002] Currently, as core basic components of power transmission, rail transit, building wiring, and municipal pipeline networks, the tensile strength of finished wires and cables is a mandatory sampling inspection indicator before they leave the factory. According to national standards such as GB / T2951 and GB / T12976, tensile tests are required to verify the breaking tensile force and elongation parameters of the sheath, insulation layer, and stranded conductors. This is to avoid potential failures such as sheath cracking, conductor breakage, and interlayer peeling under laying traction, cable tray bends, conduit bends, and overhead load-bearing conditions. Currently, cable manufacturers generally equip themselves with universal tensile testing machines to complete the tensile strength sampling inspection of finished products, which is an indispensable process in cable quality control.

[0003] In related technologies, existing conventional cable tensile testing machines uniformly adopt three types of clamping structures: end-split clamps, V-groove clamps, and three-point / four-point chucks. These can only clamp the two ends of the cable to achieve single linear axial tension. The clamps are fixed-size rigid structures, and when the cable outer diameter is changed, different specifications of clamps need to be replaced in batches. Large-diameter clamps cause interference, and small-diameter clamps cause slippage. Alternating testing of multiple specifications of cables and changing parts is time-consuming, resulting in low testing efficiency. For example, CN118687979A discloses a cable tensile testing device and method for transmission lines. In use, the cable to be tested is first straightened and its two ends are respectively connected to the corresponding four-jaw self-centering chuck, and the cable is locked by the four-jaw self-centering chuck. This invention uses a four-jaw self-centering chuck to replace the traditional clamping head structure, which further improves the stability of the clamping and ensures that the deformation at the clamping point of the coaxial cable is small.

[0004] The aforementioned technologies have the following drawbacks: The clamps are fixed-size rigid structures, requiring batch replacement of clamps of different specifications when changing the cable's outer diameter. Large-diameter clamps experience interference, while small-diameter clamps slip and suspend in mid-air. Alternating testing of multiple cable specifications and replacement of clamps is time-consuming, resulting in low testing efficiency. Three-jaw / four-jaw chuck structures and clamping plates involve localized point / line contact clamping, leading to highly concentrated clamping stress. This easily causes premature crushing and breakage of the clamping sheath, resulting in the fracture location falling within the clamping area rather than the cable itself. Consequently, the measured tensile force and elongation data are distorted and cannot reflect the cable's true tensile strength. Furthermore, in existing technologies, the clamping device is generally fixed to the worktable and cannot rotate. This causes the cable to rotate near the clamping device during stretching, resulting in the cable at the clamping position failing before the main cable body. Summary of the Invention

[0005] In order to enable the clamp to be compatible with cables of various sizes and to disperse the clamping stress at the contact point between the clamp and the cable, so that the cable is less likely to break due to excessive stress at the clamp during tensile performance testing, thus preventing distortion of the tensile force and elongation test data, this application provides a tensile performance testing device for cable production.

[0006] The tensile performance testing equipment for cable production provided in this application adopts the following technical solution: A tensile strength testing device for cable production includes a support base, on which: Two clamping devices are both mounted on the support base, and the clamping devices include: The support tube is rotatably mounted on the support base; Multiple metal aperture mechanisms are coaxially mounted inside the support tube; A flexible clamping tube, coaxially disposed within the plurality of said metal aperture mechanisms, is connected to the aperture blades of said metal aperture; and... A tension adjustment device is provided on the support base between the two clamping devices; The cable is placed in two elastic clamping tubes at both ends, and the levers of multiple metal aperture mechanisms are rotated synchronously. This causes the multiple aperture blades of the metal aperture mechanisms to close synchronously and elastically clamp the ends of the cable through the elastic clamping tubes. The tension adjustment device is used to pull the cable and detect the tension data that the cable can withstand.

[0007] Optionally, a following is provided between the support tube and the support base: The movable base is fixedly connected to the support tube and rotatably connected to the support base; Multiple adjustment and maintenance holes are provided on the support tube and correspond one-to-one with multiple metal aperture mechanisms. The lever of the metal aperture mechanism is located in the corresponding adjustment and maintenance hole. Wherein, after the metal aperture mechanism is inserted into the corresponding adjustment and maintenance hole, the fixed base ring of the metal aperture mechanism is detachably connected to the support tube.

[0008] Optionally, the elastic clamping tube is provided with the following in the circumferential direction: Multiple metal rods are distributed along the length of the elastic clamping tube, and each of the multiple metal rods corresponds one-to-one with a plurality of aperture blades of the metal aperture mechanism, with each metal rod connected to the corresponding aperture blade.

[0009] Optionally, each of the aperture blades is connected to a corresponding metal rod by a sliding assembly, the sliding assembly comprising: A dovetail slider is connected to the metal rod, and a plug is provided at the end of the dovetail slider that points to the tension adjustment device; A dovetail slide rail is connected to the end of the aperture blade that points to the center of the metal aperture mechanism, and a slot is provided on the dovetail slide rail; The dovetail slider is slidably connected to the dovetail slide rail, and the dovetail slider slides toward the tension adjustment device, so that the plug can be inserted into the slot.

[0010] Optionally, the plug and the slot can be magnetically attached.

[0011] Optionally, the clamping device further includes a synchronous drive mechanism disposed on the movable base, the synchronous drive mechanism comprising: A synchronizing rod is detachably connected to the levers of the plurality of metal aperture mechanisms; The rotating ring is coaxial with the support tube and rotatably connected to the movable base, and is also detachably connected to the synchronizing rod.

[0012] Optionally, there are two rotating rings, which are respectively located at both ends of the synchronizing rod and are detachably connected to the synchronizing rod. The outer wall of the rotating ring is provided with a coaxial first toothed ring, and a meshing first driving gear is provided on the side of the first toothed ring. The first driving gear is connected to a first motor mounted on the movable base.

[0013] Optionally, the tension adjustment device includes: The second rotating ring is rotatably connected to the support base; The threading loop is coaxially disposed inside the second rotating ring; The telescopic component has one end connected to the second rotating ring and the other end connected to the threading ring via a tension sensor; The cable threading ring is used to pass through the cable, the telescopic member is used to pull the cable threading ring, thereby pulling the cable, and the second rotating ring adjusts the direction in which the telescopic member pulls the cable threading ring by rotation.

[0014] In summary, this application includes at least one of the following beneficial technical effects: 1. In this application, compared with the prior art, the metal aperture mechanism, by setting multiple aperture blades, such as 10-15 or even more, ensures that the stress of the metal aperture mechanism clamping the cable is not concentrated at two or three points, but is distributed to more than ten points. This avoids excessive stress concentration that could cause damage to the clamped part of the cable first, rather than the cable body itself being pulled apart first. The tubular elastic clamping tube itself can wrap around the cable surface under the action of the restoring elastic force, which also has a certain limiting effect on the cable. Moreover, the elastic clamping tube allows the aperture blades to make flexible contact with the cable, which can further effectively disperse stress, reduce local peak clamping stress, and further disperse the clamping stress on the cable surface. Thus, the clamping stress on the cable surface is distributed as much as possible along the circumference of the cable, rather than being too concentrated at a few points. Furthermore, the metal aperture mechanism can freely adjust the size of the inner ring, allowing for stepless adjustment and thus adapting to cables of various sizes. When a traditional claw-type clamping mechanism holds a cable, if the axial tensile force exceeds the maximum static friction force that the claw can provide, the cable is pulled outward, forcing the claw to retract along the conical surface. This causes the claw to open radially (the opening expands outward), resulting in the loss of clamping force and cable slippage. The metal aperture mechanism, on the other hand, secures the cable by gripping it with multiple aperture blades. The direction of the cable's tension is perpendicular to the direction of the aperture blades' movement. Even with excessive cable tension, unless the cable is broken from the aperture blades or the aperture blades are deformed, it is less likely for the aperture blades to loosen due to excessive cable tension. Compared to the traditional claw-type clamping mechanism, this gripping method of the metal aperture mechanism is more stable.

[0015] 2. In this application, when the tension adjustment device pulls the cable, the movable base can be pulled and rotated adaptively by the cable tension. Furthermore, the movable base can automatically adjust the angle of the metal ring mechanism (clamping device) in real time according to the direction of the cable tension. This ensures that the cable on one side of the tension adjustment device and the clamping device holding that side of the cable maintain a coaxial posture, thus preventing the cable from easily turning at the position near the clamping device. This prevents stress concentration and lateral compression damage caused by turning during the tensioning process, which could lead to cable failure at the clamping device before the main cable body, ensuring the accuracy of the cable tensile performance test.

[0016] 3. In this application, when the metal aperture mechanism drives multiple aperture blades to move outward synchronously and pull the elastic tube, the elastic tube directly pulled by the multiple aperture blades will expand in diameter. However, the elastic tube between two adjacent metal aperture mechanisms is not directly pulled, and under its own restoring elastic force, the diameter of that elastic tube segment will be smaller than the diameter of the elastic tube end inside the metal aperture mechanism. In other words, the overall expansion of the elastic tube is uneven, which is not conducive to the smooth insertion of the cable into the elastic tube. By using the aperture blades to pull the metal rod outward, the entire elastic tube can be pulled outward directly to expand in diameter, so that the elastic tube can expand in diameter uniformly and is less likely to have uneven expansion.

[0017] 4. In this application, when installing the elastic clamping tube, the dovetail slider and the dovetail slide rail are slidably connected, and the plug is directly inserted into the slot to realize the installation of the elastic clamping tube. The elastic clamping tube is easy and quick to install and remove. When testing the tensile performance of the cable, the more force the cable is pulled, the more secure the plug-slot connection is.

[0018] 5. In this application, a first motor drives a first driving gear to rotate, which in turn drives a first gear ring to rotate. The first gear ring then drives a rotating ring to rotate, which in turn drives a synchronizing rod to rotate. The synchronizing rod then drives multiple levers to rotate synchronously, enabling multiple metal aperture mechanisms to operate synchronously. Here, the first motor is a self-locking motor, such as a worm gear reducer motor. The two rotating rings can respectively limit the ends of the synchronizing rod, allowing the synchronizing rod to drive all the metal aperture mechanisms to operate synchronously and effectively, thus ensuring that all metal aperture mechanisms can stably and effectively clamp the cable. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the overall structure of the clamping device; Figure 3 yes Figure 2 Top view of the clamping device; Figure 4 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 5 yes Figure 4 A magnified structural diagram of part A in the middle.

[0021] Figure label: 1. Support base; 10. Clamping device; 2. Support tube; 201. Adjustment and maintenance hole; 20. Movable base; 3. Metal aperture mechanism; 31. Fixed base ring; 32. Aperture blades; 33. Drive ring; 34. Lever; 4. Flexible clamping tube; 41. Metal rod; 5. Sliding assembly; 51. Dovetail slider; 511. Plug; 52. Dovetail slide rail; 521. Slot; 6. Synchronous drive mechanism; 61. Sleeve; 62. Synchronous rod; 63. First rotating ring; 64. First gear ring; 65. First drive gear; 66. First motor; 7. Tension adjustment device; 71. Second rotating ring; 72. Telescopic component; 73. Threading ring; 74. Tension sensor. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] This application discloses a tensile performance testing device for cable production.

[0024] Reference Figure 1 and Figure 2 A tensile strength testing device for cable production includes a support base 1, on which: Reference Figure 2 , Figure 3 and Figure 4 Two clamping devices 10 are both mounted on the support base 1. Each clamping device 10 includes: Reference Figure 2 , Figure 3 and Figure 4 Support tube 2 is rotatably mounted on support base 1. Specifically, support tube 2 is set horizontally. Reference Figure 2 , Figure 3 and Figure 4 Multiple metal aperture mechanisms 3 are coaxially mounted inside the support tube 2. Specifically, the metal aperture mechanism 3 is the aperture mechanism on a camera in the prior art. The structure of the metal aperture mechanism 3 is briefly described below. The metal aperture mechanism 3 includes a fixed base ring 31, aperture blades 32 (preferably, the number of aperture blades 32 is at least 10), a drive rotating ring 33, and a lever 34. The fixed base ring 31 has a pivot hole. The aperture blades 32 are hinged into the pivot hole through their own fixed pivot pins, allowing each aperture blade 32 to rotate around a fixed pivot pin. The movable pin at the other end of the blade is engaged in the arc-shaped guide groove of the drive rotating ring 33. The drive rotating ring 33 is coaxially sleeved on the outside of the fixed base ring 31 and can rotate circumferentially relative to the base ring. External force actuates the lever 34 on the drive rotating ring 33, causing the drive rotating ring 33 to rotate circumferentially around the aperture center. Unlike existing technologies, the metal aperture mechanism 3 of this application is made of rigid metal, such as stainless steel, and the aperture blades 32 need to have a certain thickness in order to clamp the cable instead of cutting it. Reference Figure 2 , Figure 3 and Figure 4 The elastic clamping tube 4 is coaxially disposed within multiple metal aperture mechanisms 3 and connected to the aperture blades 32 of the metal aperture; and, Reference Figure 2 , Figure 3 and Figure 4 The tension adjustment device 7 is located on the support base 1 between the two clamping devices 10, and is used to limit the position of the middle part of the cable, as well as to pull the cable and detect the tension that the cable can withstand. Reference Figure 2 , Figure 3 and Figure 4 In this process, the two ends of the cable are placed in two elastic clamping tubes 4 respectively, and the levers 34 of multiple metal aperture mechanisms 3 are pushed to rotate synchronously, so that the multiple aperture blades 32 of the metal aperture mechanism 3 are closed synchronously and the ends of the cable are elastically clamped through the elastic clamping tubes 4. The tension adjustment device 7 is used to pull the cable and detect the tension data that the cable can withstand.

[0025] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, the middle of the cable is limited by a tension adjustment device 7, and both ends of the cable are fixed by a clamping device 10. When the clamping device 10 is in operation, it pushes the levers 34 of the multiple metal aperture mechanisms 3, causing the multiple aperture blades 32 to move outward synchronously, thereby pulling the elastic clamping tube 4 outward and expanding its inner diameter to facilitate cable entry. Then, it pushes the levers 34 of the multiple metal aperture mechanisms 3 in the opposite direction, causing the multiple aperture blades 32 to move inward synchronously, thereby reducing the diameter of the elastic clamping tube 4 to fit against the cable. The multiple aperture blades 32 then close inward, pressing the elastic clamping tube 4 against the outer wall of the cable, thus clamping the cable. The elastic clamping tube 4 allows the aperture blades 32 to make flexible contact with the cable. The tension adjustment device 7 is then used to pull the cable until it tears or breaks, and to detect the tensile force the cable can withstand, thereby determining the maximum tensile force the cable can withstand.

[0026] Reference Figure 1 , Figure 3 and Figure 4In existing technologies, traditional claw-type clamping mechanisms not only suffer from excessive concentration of clamping stress, but also tend to loosen when the tension exceeds a preset value, as they achieve cable clamping by rotating multiple claws towards the cable. In contrast, this application utilizes a metal aperture mechanism 3 with multiple aperture blades 32 (e.g., 10-15 or more) to distribute the cable clamping stress from two or three points to more than ten points, preventing excessive stress concentration from damaging the clamped portion of the cable before the cable itself is pulled apart. The tubular elastic clamping tube 4 wraps around the cable surface under the action of restoring elasticity, providing a certain degree of restraint. Furthermore, the elastic clamping tube 4 allows the aperture blades 32 to flexibly contact the cable, further effectively dispersing stress, reducing local peak clamping stress, and further dispersing the clamping stress on the cable surface. This ensures that the clamping stress on the cable surface is distributed as much as possible around the circumference of the cable, rather than being concentrated at a few points. The metal aperture mechanism 3 allows for free adjustment of the inner ring size, enabling stepless adjustment to accommodate cables of various sizes. In traditional claw-type clamping mechanisms, when the axial tension exceeds the maximum static friction force provided by the claws, the cable is pulled outwards, forcing the claws to retract along the conical surface, causing the claws to open radially (the openings expand outwards), leading to the loss of clamping force and cable slippage. The metal aperture mechanism 3 secures the cable by gripping it with multiple aperture blades 32. The direction of cable tension and the direction of movement of the aperture blades 32 are perpendicular. Even with excessive cable tension, unless the cable is broken from the aperture blades 32 or the aperture blades 32 are deformed, it is less likely for the aperture blades 32 to loosen due to excessive cable tension. Compared to traditional claw-type clamping mechanisms, this gripping method of the metal aperture mechanism 3 is more stable.

[0027] Reference Figure 1 , Figure 3 and Figure 4 A connection is provided between the support tube 2 and the support base 1: The movable base 20 is fixedly connected to the support tube 2 and rotatably connected to the support base 1. Specifically, in this application, the movable base 20 and the support base 1 are hinged together by a hinge, and the hinge is also rotatably connected to the support base 1. In other embodiments, the movable base 20 and the support base 1 can also be hinged together by a ball joint. Multiple adjustment and maintenance holes 201 are provided on the support tube 2 and correspond one-to-one with multiple metal aperture mechanisms 3. The lever 34 of the metal aperture mechanism 3 is provided in the corresponding adjustment and maintenance hole 201. Specifically, the adjustment and maintenance hole 201 is provided on the top tube wall of the support tube 2, which facilitates the vertical insertion and removal of the metal aperture mechanism 3 in the adjustment and maintenance hole 201. When the metal aperture mechanism 3 is inserted into the corresponding adjustment and maintenance hole 201, the fixed base ring 31 of the metal aperture mechanism 3 is detachably connected to the support tube 2. Specifically, the fixed base ring 31 of the metal aperture mechanism 3 and the support tube 2 are fixed by bolts. When a metal aperture mechanism 3 needs maintenance, the corresponding bolts can be removed first, and then the metal aperture mechanism 3 can be taken out from the adjustment and maintenance hole 201, so as to realize the quick disassembly and maintenance of the metal aperture mechanism 3.

[0028] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, when the tension adjustment device 7 pulls the cable, the movable base 20 can be pulled and rotated adaptively by the cable tension. The movable base 20 can then automatically adjust the angle of the metal ring mechanism 3 (i.e., the clamping device 10) in real time according to the direction of the cable tension. This ensures that the cable on one side of the tension adjustment device 7 and the clamping device 10 holding that side of the cable maintain a coaxial posture, thus preventing the cable from easily turning at the position near the clamping device 10. This prevents stress concentration and lateral compression damage caused by turning during the stretching process, which could lead to cable failure at the clamping device 10 before the main cable body, ensuring the accuracy of the cable tensile performance test.

[0029] Reference Figure 1 , Figure 3 and Figure 4 The elastic clamping tube 4 is provided with the following in the circumferential direction: Multiple metal rods 41 are distributed along the length of the elastic tube. Each metal rod 41 corresponds to a different aperture blade 32 of the metal aperture mechanism 3. The metal rods 41 are connected to the corresponding aperture blades 32. Specifically, the length of the metal rods 41 is equal to that of the elastic tube, and the two ends of the metal rods 41 are flush with the two ends of the elastic tube.

[0030] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, when the metal aperture mechanism 3 drives multiple aperture blades 32 to move outward synchronously and pull the elastic tube, the elastic tube directly pulled by the multiple aperture blades 32 will expand in diameter. However, the elastic tube between two adjacent metal aperture mechanisms 3 is not directly pulled, and under its own restoring elastic force, the diameter of the elastic tube segment at that point will be smaller than the diameter of the elastic tube end inside the metal aperture mechanism 3. In other words, the overall expansion of the elastic tube is uneven, which is not conducive to the smooth insertion of the cable into the elastic tube. Here, by pulling the metal rod 41 outward by the aperture blades 32, the entire elastic tube can be directly pulled outward to expand in diameter, so that the elastic tube can expand in diameter uniformly and is less likely to have uneven expansion.

[0031] Reference Figure 4 and Figure 5Each aperture blade 32 is connected to a corresponding metal rod 41 by a sliding assembly 5, the sliding assembly 5 including: The dovetail slider 51 is connected to the metal rod 41, and the end of the dovetail slider 51 pointing towards the tension adjustment device 7 is provided with a plug 511; The dovetail slide rail 52 is connected to one end of the aperture blade 32 that points to the center of the metal aperture mechanism 3, and the dovetail slide rail 52 is provided with a slot 521. The dovetail slider 51 is slidably connected to the dovetail slide rail 52, and the dovetail slider 51 slides toward the tension adjustment device 7, so that the plug 511 can be plugged into the slot 521, and the plug 511 and the slot 521 can be magnetically attracted.

[0032] Reference Figure 4 and Figure 5 In this embodiment of the application, when installing the elastic clamping tube 4, the dovetail slider 51 is slidably connected to the dovetail slide rail 52, and the plug 511 is directly inserted into the slot 521 to realize the installation of the elastic clamping tube 4. The elastic clamping tube 4 is easy and quick to install and remove. When testing the tensile performance of the cable, the more force the cable is pulled, the more firmly the plug 511 is connected to the slot 521.

[0033] Reference Figure 1 , Figure 3 and Figure 4 The clamping device 10 also includes a synchronous drive mechanism 6 disposed on the movable base 20, the synchronous drive mechanism 6 including: The synchronizing rod 62 is detachably connected to the levers 34 of the multiple metal aperture mechanisms 3. Specifically, the levers 34 are provided with sleeves 61, and the synchronizing rod 62 passes through the multiple sleeves 61. The rotating ring is coaxial with the support tube 2 and rotatably connected to the movable base 20. It is also detachably connected to the synchronizing rod 62. Specifically, the synchronizing rod 62 is screwed to the rotating ring. There are two rotating rings, which are respectively located at both ends of the synchronizing rod 62 and are detachably connected to the synchronizing rod 62. The outer wall of the rotating ring is provided with a coaxial first toothed ring 64. A meshing first driving gear 65 is provided on the side of the first toothed ring 64. The first driving gear 65 is connected to a first motor 66 mounted on the movable base 20.

[0034] Reference Figure 1 , Figure 3 and Figure 4In this embodiment, a first motor 66 drives a first drive gear 65 to rotate, which in turn drives a first gear ring 64 to rotate. The gear ring 64 then drives a rotating ring to rotate, which in turn drives a synchronizing rod 62 to rotate. The synchronizing rod 62 then drives multiple levers 34 to rotate synchronously, causing multiple metal aperture mechanisms 3 to operate synchronously. Here, the first motor 66 is a self-locking motor, such as a worm gear reducer motor. The two rotating rings can respectively limit the two ends of the synchronizing rod 62, enabling the synchronizing rod 62 to drive all the metal aperture mechanisms 3 to operate synchronously and effectively, thus ensuring that all metal aperture mechanisms 3 can stably and effectively clamp the cable.

[0035] Reference Figure 1 , Figure 3 and Figure 4 The tension adjustment device 7 includes: The second rotating ring 71 is rotatably connected to the support base 1. Specifically, the outer side of the second rotating ring 71 is provided with a coaxial second toothed ring, and the side of the second toothed ring is provided with a meshing second drive gear. The second drive gear is connected to a second motor installed on the support base 1. The second motor drives the second drive gear to rotate, the second drive gear drives the second toothed ring to rotate, and the second toothed ring drives the rotating ring to rotate. The threading ring 73 is coaxially disposed within the second rotating ring 71; The telescopic component 72 is connected at one end to the second rotating ring 71, and at the other end to the threaded ring 73 via the tension sensor 74; The cable threading ring 73 is used to pass the cable through, the telescopic member 72 is used to pull the cable threading ring 73, and thus pull the cable. The second rotating ring 71 adjusts the direction in which the telescopic member 72 pulls the cable threading ring 73 by rotating.

[0036] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, the cable first passes through the threading ring 73, and then the clamping device 10 fixes both ends of the cable. When testing the tensile strength of the cable, the direction of the telescopic member 72 pulling the threading ring 73 is adjusted by rotating the second rotating ring 71, thereby adjusting the tensile direction of the cable. By shortening the telescopic member 72, the cable is pulled, and a tensile force is applied to the cable.

Claims

1. A tensile performance testing device for cable production, characterized in that: Includes a support base (1), on which are provided: Two clamping devices (10) are both mounted on the support base (1), and each clamping device (10) includes: The support tube (2) is rotatably mounted on the support base (1); Multiple metal aperture mechanisms (3) are coaxially installed inside the support tube (2); An elastic clamping tube (4) is coaxially disposed within the plurality of said metal aperture mechanisms (3) and connected to the aperture blades (32) of said metal aperture; and, A tension adjustment device (7) is provided on the support base (1) between the two clamping devices (10); The two ends of the cable are respectively placed in the two elastic clamping tubes (4), and the levers (34) of the multiple metal aperture mechanisms (3) are pushed to rotate synchronously, so that the multiple aperture blades (32) of the metal aperture mechanism (3) are closed synchronously and the ends of the cable are elastically clamped by the elastic clamping tubes (4). The tension adjustment device (7) is used to pull the cable and detect the tension data that the cable can withstand.

2. The tensile performance testing equipment for cable production according to claim 1, characterized in that: A connection is provided between the support tube (2) and the support base (1): The movable base (20) is fixedly connected to the support tube (2) and rotatably connected to the support base (1); Multiple adjustment and maintenance holes (201) are provided on the support tube (2) and correspond one-to-one with multiple metal aperture mechanisms (3). The lever (34) of the metal aperture mechanism (3) is provided in the corresponding adjustment and maintenance hole (201). Wherein, after the metal aperture mechanism (3) is inserted into the corresponding adjustment and maintenance hole (201), the fixed base ring (31) of the metal aperture mechanism (3) is detachably connected to the support tube (2).

3. The tensile performance testing equipment for cable production according to claim 1, characterized in that: The elastic clamping tube (4) is provided with the following circumferential direction: Multiple metal rods (41) are distributed along the length of the elastic clamping tube (4). Each of the multiple metal rods (41) corresponds to a multiple aperture blade (32) of the metal aperture mechanism (3). The metal rods (41) are connected to the corresponding aperture blade (32).

4. The tensile performance testing equipment for cable production according to claim 3, characterized in that: Each of the aperture blades (32) is connected to a corresponding metal rod (41) by a sliding assembly (5), the sliding assembly (5) comprising: A dovetail slider (51) is connected to the metal rod (41), and a plug (511) is provided at one end of the dovetail slider (51) pointing towards the tension adjustment device (7). The dovetail slide rail (52) is connected to one end of the aperture blade (32) pointing to the center of the metal aperture mechanism (3), and the dovetail slide rail (52) is provided with a slot (521). The dovetail slider (51) is slidably connected to the dovetail slide rail (52), and the dovetail slider (51) slides toward the tension adjustment device (7) so that the plug (511) can be plugged into the slot (521).

5. The tensile performance testing equipment for cable production according to claim 4, characterized in that: The plug (511) and the slot (521) can be magnetically attracted to each other.

6. The tensile performance testing equipment for cable production according to claim 2, characterized in that: The clamping device (10) further includes a synchronous drive mechanism (6) disposed on the movable base (20), the synchronous drive mechanism (6) comprising: Synchronization rod (62) is detachably connected to the levers (34) of the plurality of metal aperture mechanisms (3); The rotating ring is coaxial with the support tube (2) and rotatably connected to the movable base (20), and is also detachably connected to the synchronizing rod (62).

7. The tensile performance testing equipment for cable production according to claim 6, characterized in that: There are two rotating rings, which are respectively located at both ends of the synchronizing rod (62) and are detachably connected to the synchronizing rod (62). The outer wall of the rotating ring is provided with a coaxial first toothed ring (64), and a meshing first driving gear (65) is provided on the side of the first toothed ring (64). The first driving gear (65) is connected to a first motor (66) mounted on the movable base (20).

8. The tensile performance testing equipment for cable production according to claim 1, characterized in that: The tension adjustment device (7) includes: The second rotating ring (71) is rotatably connected to the support base (1); The threading loop (73) is coaxially disposed inside the second rotating ring (71); The telescopic component (72) is connected at one end to the second rotating ring (71) and at the other end to the threading ring (73); The threading ring (73) is used to pass through the cable, the telescopic member (72) is used to pull the threading ring (73) and thus pull the cable, and the second rotating ring (71) adjusts the direction in which the telescopic member (72) pulls the threading ring (73) by rotating.

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