Malleability test extensometer for wires and cables

Abstract

The invention is applicable to the technical field of electric wire and cable ductility test, and provides an electric wire and cable ductility test extensometer, which comprises a case, and the case comprises a bottom plate, a cabinet door mounted on the side wall of the bottom plate, and a top plate arranged at the top of the cabinet door; the top of the bottom plate is provided with a test unit, and the side wall of the cabinet door is provided with a control unit. The testing unit comprises a wire coiling assembly arranged at the top of the bottom plate, a side stretching assembly arranged at the top of the bottom plate and a stretching assembly arranged longitudinally; a control module is arranged in the control unit, and temperature and humidity are adjusted according to different test requirements. The device solves the problems that in the actual use process of wires and cables, the wires and cables face complex environments, high-temperature and high-humidity conditions possibly exist, and ductility testing needs to be carried out on the wires and cables at different temperatures and different humidity, and the purposes of testing the ductility of the wires and cables in different environments and improving the ductility of the wires and cables are achieved. And the breakage-proof capability of the rubber of the electric wire and the cable can be tested.

Description

Technical Field

[0001] The invention relates to the technical field of cable tensile testing, and more specifically, to a ductility testing tensile instrument for electric wires and cables. Background Art

[0002] There are two key links in the wire and cable manufacturing industry, namely the wire and cable production link and the wire and cable testing link, especially the wire and cable testing link, which is a key stop for quality control and a comprehensive assessment of the various performances of wires and cables. The tensile test is a very important test for cable testing to detect its quality. The purpose of the experiment is to perform tensile tests on wires and cables and obtain a series of experimental data, and compare the obtained data with the national wire and cable production quality standard data to ensure the qualification of the tensile strength of the wires and cables and the correctness and effectiveness of the tensile test.

[0003] The test tensile testers on the market usually use a stretching mechanism to stretch the wires and cables and record the data. Although this test can test the ductility of the wires and cables, in actual use, the layout environment of the wires and cables is very complex. The wires and cables may be arranged in environments with different humidity and temperature, or even in high temperature and high humidity environments. Therefore, the test tensile tester should take this into consideration.

[0004] At the same time, in actual use, the high temperature and high humidity environment of wires and cables will not only affect the wires and cables themselves, but also the insulating plastic skin wrapped on the outside. During use, the tensile ductility of the insulating plastic skin is a very important consideration, but it is also necessary to consider its ductility when subjected to small impacts on the force-bearing area and its ability to prevent damage, so design is required. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a wire and cable ductility test tensile instrument that can perform tensile tests on wires and cables, and can test the ductility of wires and cables in different environments by setting different ambient temperatures and humidities, and can also test the plastic rubber of wires and cables.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A ductility test tensile tester for electric wires and cables, comprising a chassis, wherein the chassis comprises a bottom plate, a cabinet door installed on a side wall of the bottom plate, and a top plate arranged on the top of the cabinet door;

[0008] A test unit is installed on the top of the bottom plate, and a control unit is installed on the side wall of the cabinet door;

[0009] The test unit includes a wire coiling assembly arranged on the top of the bottom plate, a side stretching assembly arranged on the top of the bottom plate, and a longitudinally arranged stretching assembly;

[0010] The control unit has a built-in control module to adjust the temperature and humidity according to different test requirements.

[0011] The present invention is further configured as follows: the wire coiling assembly includes a wire coiling support frame arranged on the top of the base plate, a mounting plate is installed on the top of the wire coiling support frame, a wire coiling plate is connected to the side wall of the mounting plate, and a driving end is installed on the side of the wire coiling plate close to the mounting plate.

[0012] The present invention is further configured as follows: a wire threading hole is formed through the wire winding board, one end of the wire winding board away from the wire winding support frame is rotatably connected to a wire winding column, a wire following clamp is arranged at a position of the wire winding board corresponding to the wire threading hole, and a wire winding shell is sleeved on the wire winding board.

[0013] By adopting the above technical solution, the tester places the wire and cable reel on the wire reel assembly, passes the wire and cable through the threading hole and places it on the wire clamp. The driving end can drive the wire reel column to rotate, and the wire and cable can be transmitted outward by rotation. After the wire and cable are transported to the tensile assembly, the wire and cable can be subjected to a tensile test.

[0014] The present invention is further configured as follows: the side stretching assembly includes a first slide rail vertically arranged on the top of the bottom plate, a side stretching module is slidably connected to the first slide rail, and a puncture module is slidably connected to the side of the first slide rail away from the side stretching module.

[0015] The present invention is further configured as follows: the side stretching module includes a first side slider slidably connected to the first slide rail, a side mounting plate is installed on the side of the first side slider away from the wire coil support frame, the side mounting plate is connected to a side main part on the side away from the first side slider, a rotating head is connected to the side main part, and two groups of clamping heads are symmetrically connected to one end of the rotating head away from the side main part.

[0016] The present invention is further configured as follows: the puncture module includes a second side slider slidably connected to the first slide rail, the second side slider is connected to a mounting block at one end away from the first slide rail, the mounting block is connected to a puncture body, the puncture body is connected to a telescopic rod at one end away from the mounting block, and the telescopic rod is connected to a puncture needle.

[0017] After the stretching assembly clamps the wires and cables, the two sets of clamping heads clamp the plastic rubber of the wires and cables. After clamping, the rotating head drives it to move in the opposite direction to test the lateral ductility of the plastic rubber of the wires and cables. At the same time, after clamping, the plastic rubber of the wires and cables can be rotated by rotating the rotating head so that its wider side faces the puncture module, and the telescopic rod drives the puncture needle to puncture the rubber of the wires and cables to test its puncture toughness.

[0018] The present invention is further configured as follows: the stretching assembly includes a collecting frame configured as a hollow rectangular parallelepiped, a second slide rail connected to the bottom of the top plate, a lower stretching block is slidably connected to the second slide rail, and an upper stretching block with the same structure is arranged on the top of the lower stretching block.

[0019] The present invention is further configured as follows: the upper stretching block includes a driving block, the driving block is connected to a stretching slider slidably connected to the second slide rail, one side of the stretching slider is connected to a stretching body, the stretching body is connected to a fixing plate, and two groups of wire clamping heads are symmetrically arranged on the fixing plate.

[0020] The present invention is further configured as follows: the two groups of thread clamping heads are symmetrically arranged facing each other, and each group of the thread clamping heads is provided with a group of thread clamping grooves.

[0021] When the wires and cables are output from the winding assembly to the stretching assembly, the upper stretching block and the lower stretching block tightly clamp the wires and cables to prevent them from falling off. After clamping, the upper stretching block slides upward and the lower stretching block slides downward to stretch the wires and cables and record them.

[0022] The present invention is further configured as follows: the control module includes a temperature control module, a humidity control module, and a recording module;

[0023] The temperature control module controls the temperature of the equipment according to different experimental requirements;

[0024] The humidity control module controls the humidity of the equipment according to different experimental requirements;

[0025] The recording module records the deformation process and data of the cable, including the elastic stage, the yield stage, the strengthening stage, the local deformation stage and the fracture stage.

[0026] By adopting the above technical solution, the recording module can record the deformation process and data of the cable, including the elastic stage, yield stage, strengthening stage, local deformation stage and fracture stage. The recording module can take points of the recorded data, calculate the tensile strength and elongation, and analyze the stress-strain curve. The performance of the wires and cables can be analyzed through the curves and the performance of the wires and cables.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The tester places the wire and cable reel on the winding assembly, passes the wire and cable through the threading hole and places it on the line clamp. The driving end can drive the winding column to rotate, and the wire and cable can be transmitted outward by rotation. After the wire and cable are transported to the stretching assembly, the wire and cable can be stretched and tested. When the wire and cable are output from the winding assembly to the stretching assembly, the upper stretching block and the lower stretching block tightly clamp the wire and cable to prevent the wire and cable from falling off. After the clamping is completed, the upper stretching block slides upward and the lower stretching block slides downward to stretch the wire and cable and record it.

[0029] 2. After the stretching assembly clamps the wires and cables, the two sets of clamping heads clamp the plastic rubber of the wires and cables. After clamping, the rotating head drives it to move in the opposite direction to test the lateral ductility of the plastic rubber of the wires and cables. At the same time, after clamping, the plastic rubber of the wires and cables can be rotated by rotating the rotating head so that its wider side faces the puncture module, and the telescopic rod drives the puncture needle to puncture the rubber of the wires and cables to test its puncture toughness.

[0030] 3. The recording module can record the deformation process and data of the cable, including the elastic stage, yield stage, strengthening stage, local deformation stage and fracture stage. The recording module can take points from the recorded data, calculate the tensile strength and elongation, and analyze the stress-strain curve. The performance of the wires and cables can be analyzed through the curves and the performance of the wires and cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic structural diagram of a ductility testing tensile tester for electric wires and cables.

[0032] Figure 2 It is a schematic diagram of the structure of the test unit in the present invention.

[0033] Figure 3 It is a schematic diagram of the structure of the coil wire assembly in the present invention.

[0034] Figure 4 It is an exploded schematic diagram of the coil wire assembly of the present invention.

[0035] Figure 5 It is a schematic diagram of the structure of the stretching assembly in the present invention.

[0036] Figure 6 It is a schematic structural diagram of the upper stretching block in the present invention.

[0037] Figure 7 It is a schematic structural diagram of the side stretching assembly in the present invention.

[0038] Figure 8 It is a schematic structural diagram of the side stretching module in the present invention.

[0039] Fig. 9 It is a structural schematic diagram of the puncture module in the present invention.

[0040] Description of reference numerals: 1, chassis; 11, bottom plate; 12, cabinet door; 13, top plate;

[0041] 2. Test unit; 21. Wire coiling assembly; 211. Wire coiling support frame; 212. Mounting plate; 213. Wire coiling plate; 214. Driving end; 215. Wire coiling column; 216. Threading hole; 217. Wire clamp; 218. Wire coil shell; 22. Side stretching assembly; 221. First slide rail; 222. Side stretching module; 2221. First side slider; 2222. Side mounting plate; 2223. Side main part; 2224. Rotating head; 2225. Clamping head ; 223, puncture module; 2231, second side slider; 2232, mounting block; 2233, puncture body; 2234, telescopic rod; 2235, puncture needle; 23, stretching assembly; 231, collection frame; 232, lower stretching block; 233, upper stretching block; 2331, driving block; 2332, stretching slider; 2333, stretching body; 2334, fixing plate; 2335, clamping head; 2336, clamping groove; 234, second slide rail;

[0042] 3. Control unit. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0045] See also Figure 1-Figure 9 , the present invention provides the following technical solutions:

[0046] For example, see Figure 1-Figure 9 A ductility test tensile instrument for wires and cables includes a chassis 1. The chassis 1 includes a bottom plate 11. The bottom plate 11 is arranged in a rectangular structure. The bottom plate 11 is provided with holes. A cabinet door 12 is installed on the side wall of the bottom plate 11. The cabinet door 12 is composed of a metal frame and a glass plate. The glass plate can ensure that the tester can observe the test process. A top plate 13 is installed on the top of the cabinet door 12. The top plate 13 is arranged in a horizontal direction, and the top plate 13 has the same shape as the bottom plate 11.

[0047] A test unit 2 is installed on the top of the bottom plate 11, and the test unit 2 can perform tensile tests on wires and cables. A control unit 3 is installed on the side wall of the cabinet door 12. The control unit 3 has a built-in control module to adjust the temperature and humidity according to different test requirements.

[0048] The test unit 2 includes a wire coiling assembly 21 disposed on the top of the bottom plate 11, a side stretching assembly 22 disposed on the top of the bottom plate 11, and a longitudinally disposed stretching assembly 23;

[0049] See also Figure 2 , Figure 3 The test unit 2 includes a wire coiling assembly 21 disposed on the top of the bottom plate 11. The wire coiling assembly 21 can coil the wires and cables required for the tensile test, and can automatically transport the wires and cables. The wire coiling assembly 21 includes a wire coiling support frame 211 disposed on the top of the bottom plate 11. The wire coiling support frame 211 is disposed in a vertical direction. A mounting plate 212 is installed on the top of the wire coiling support frame 211. The wire coiling support frame 211 provides an installation environment for the mounting plate 212. A wire coiling plate 213 is connected to the side wall of the mounting plate 212. The mounting plate 212 provides an installation environment for the wire coiling plate 213. A driving end 214 is installed on the side of the wire coiling plate 213 close to the mounting plate 212. The driving end 214 can drive the wire coiling assembly 21 to coil the wire.

[0050] See also Figure 3 A wire threading hole 216 is formed through the wire coiling plate 213, and the wire threading hole 216 is set as a rectangular through hole. The wire threading hole 216 can allow electric wires and cables to pass through. The wire coiling plate 213 is rotatably connected to a wire coiling column 215 at one end away from the wire coiling support frame 211. The wire coiling column 215 can reel in and unreel the wires and cables. The wire coiling plate 213 is provided with a wire following clamp 217 at the position corresponding to the wire threading hole 216. The wire following clamp 217 can limit the position of the wires and cables to ensure that the wires and cables can pass through the wire threading hole 216 and enter the stretching assembly 23 accordingly. A wire coil shell 218 is sleeved on the wire coiling plate 213, and the wire coil shell 218 is set as a hollow ring structure. The wire coil shell 218 ensures the stable installation of the wire and cable reel.

[0051] Specifically, the tester places the wire and cable reel on the wire reel assembly 21, passes the wire and cable through the threading hole 216 and places it on the wire clamp 217. The driving end 214 can drive the wire reel column 215 to rotate, and the wire and cable can be transmitted outward by rotation. After the wire and cable are transported to the tensile assembly 23, the wire and cable can be subjected to a tensile test.

[0052] See also Figure 5The stretching component 23 includes a collection frame 231 configured as a hollow rectangular parallelepiped. The collection frame 231 can collect the wires and cables that are broken after stretching to prevent the broken wires and cables from contaminating the stretching instrument. The collection frame 231 is snap-connected to the hole in the bottom plate 11. The collection frame 231 can be removed, which can facilitate the staff to collect the broken wires and cables.

[0053] See also Figure 6 The stretching assembly 23 also includes a second slide rail 234 connected to the bottom of the top plate 13, a lower stretching block 232 is slidably connected to the second slide rail 234, an upper stretching block 233 with the same structure is arranged on the top of the lower stretching block 232, the upper stretching block 233 includes a driving block 2331, a stretching slider 2332 slidably connected to the second slide rail 234 is connected to the driving block 2331, the driving block 2331 can drive the upper stretching block 233 to slide on the second slide rail 234, a stretching body 2333 is connected to one side of the stretching slider 2332, a fixing plate 2334 is connected to the stretching body 2333, the stretching body 2333 provides an installation environment for the fixing plate 2334, and two groups of clamping heads 2335 are symmetrically arranged on the fixing plate 2334. The two groups of clamping heads 2335 are symmetrically arranged facing each other, and can clamp the wires and cables, and each group of clamping heads 2335 is provided with a group of clamping grooves 2336, and the clamping grooves 2336 can allow the wires and cables to pass through.

[0054] Specifically, after the wires and cables are output from the winding assembly 21 to the stretching assembly 23, the upper stretching block 233 and the lower stretching block 232 tightly clamp the wires and cables to prevent them from falling off. After clamping is completed, the upper stretching block 233 slides upward and the lower stretching block 232 slides downward to stretch the wires and cables and record them.

[0055] For example 2, please refer to Figure 6-Figure 9 The second embodiment makes the following improvements on the basis of the first embodiment. Although the tensile test of the wires and cables can be completed by the first embodiment, during the actual use of the wires and cables, the wires and cables themselves may be affected by the impact, and the insulating plastic skin wrapped on the outside may also be affected. During the use of the insulating plastic skin, although its tensile ductility is a very important consideration, it is also necessary to consider its ductility and ability to prevent damage when subjected to impact with a small force area. Therefore, it is necessary to set up a group of devices to test its ductility and ability to prevent damage when subjected to impact with a small force area.

[0056] See also Figure 7The side stretching component 22 can clamp the outer rubber of the wire and cable, and then stretch the rubber of the wire and cable laterally, so as to detect the lateral extensibility of the rubber of the wire and cable. The side stretching component 22 includes a first slide rail 221 vertically arranged on the top of the bottom plate 11, and a side stretching module 222 is slidably connected to the first slide rail 221. The side stretching module 222 can slide vertically relative to the first slide rail 221. A puncture module 223 is slidably connected to the side of the first slide rail 221 away from the side stretching module 222, and the puncture module 223 can slide vertically relative to the first slide rail 221.

[0057] See also Figure 8 The side stretching module 222 includes a first side slider 2221 slidably connected to the first slide rail 221. The first side slider 2221 can slide relative to the first slide rail 221. A side mounting plate 2222 is installed on the side of the first side slider 2221 away from the coiling support frame 211. The side mounting plate 2222 is connected to a side main component 2223 on the side away from the first side slider 2221. The side mounting plate 2222 provides an installation environment for the side main component 2223. A rotating head 2224 is connected to the side main component 2223. The rotating head 2224 can rotate and retract. Two groups of clamping heads 2225 are symmetrically connected to one end of the rotating head 2224 away from the side main component 2223. The two groups of clamping heads 2225 are arranged facing each other and can perform lateral clamping.

[0058] See also Fig. 9 The puncture module 223 includes a second side slider 2231 slidably connected to the first slide rail 221, the second side slider 2231 can slide vertically relative to the first slide rail 221, the second side slider 2231 is connected to a mounting block 2232 at one end away from the first slide rail 221, the mounting block 2232 is connected to a puncture body 2233, the puncture body 2233 is connected to a telescopic rod 2234 at one end away from the mounting block 2232, the telescopic rod 2234 can be telescoped in the horizontal direction, and the telescopic rod 2234 is connected to a puncture needle 2235.

[0059] Specifically, after the stretching assembly 23 clamps the wires and cables, the two groups of clamping heads 2225 clamp the plastic rubber of the wires and cables. After the clamping is completed, the rotating head 2224 drives it to move in the opposite direction, thereby testing the lateral ductility of the plastic rubber of the wires and cables. At the same time, after the clamping is completed, the rotating head 2224 can be rotated to rotate the plastic rubber of the wires and cables so that its wider side faces the puncture module 223, and the telescopic rod 2234 drives the puncture needle 2235 to puncture the rubber of the wires and cables to test its puncture toughness.

[0060] Embodiment 3. Embodiment 3 makes the following improvements on the basis of Embodiment 1 and Embodiment 2. Although the tensile test of wires and cables can be completed through Embodiment 1 and Embodiment 2, in the actual use of wires and cables, the environment they face is quite complex, and they may even face a high temperature and high humidity environment. Wires and cables have different ductility under different temperature and humidity environments, so it is necessary to set up a group of control modules to control the changes in temperature and humidity. In addition, the fracture change process of wires and cables is complex, and each deformation process needs to be recorded in order to better record it.

[0061] The control unit 3 has a built-in control module to adjust the temperature and humidity according to different test requirements. The control module includes a temperature control module, a humidity control module, and a recording module;

[0062] The temperature control module controls the temperature of the equipment according to different experimental requirements. The temperature adjustment range of the temperature control module is -30° to 70°, covering the extreme temperatures that may occur in the outside world.

[0063] The humidity control module controls the humidity of the equipment according to different experimental requirements.

[0064] The temperature control module and humidity control module in this embodiment adopt existing technology. The temperature control module and humidity control module that can be directly or improved by technical personnel in this field can be applied to the system of this embodiment. No absolute limitation is made on the specific structure of the temperature control module and humidity control module here.

[0065] The recording module records the deformation process and data of the cable, including the elastic stage, yield stage, strengthening stage, local deformation stage and fracture stage. The recording module can take points from the recorded data, calculate the tensile strength and elongation, and analyze the stress-strain curve. The performance of the wires and cables can be analyzed through the curves and the performance of the wires and cables.

[0066] Elastic Stage: In this stage, the cable material exhibits completely elastic behavior. When the stretching force is removed, the cable is able to return to its original length with no permanent deformation.

[0067] Yield stage: As the tensile force increases, the cable material reaches its yield point. At this point, the material begins to exhibit plastic deformation and the cable will not fully return to its original state even if the external force is removed.

[0068] Strengthening stage: After yielding, more force needs to be added to continue deforming the cable. In this stage, the internal structure of the cable material begins to rearrange to resist further deformation.

[0069] Local deformation stage (necking): When the tensile force reaches the maximum value, the weakest point of the cable begins to deform intensively, forming a local necking area. The cross-sectional area of ​​this area decreases, and the material continues to deform until it breaks.

[0070] Fracture: Eventually, the cable breaks in the necking area, which usually occurs at the weakest point of the material. After the fracture, the maximum tensile force that the wire and cable can withstand can be obtained, and its ductility can be calculated.

[0071] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A ductility test tensile tester for wires and cables, characterized in that: The case (1) comprises a bottom plate (11), a cabinet door (12) mounted on a side wall of the bottom plate (11), and a top plate (13) arranged on the top of the cabinet door (12); A test unit (2) is installed on the top of the bottom plate (11), and a control unit (3) is installed on the side wall of the cabinet door (12); The testing unit (2) comprises a wire coiling assembly (21) arranged on the top of the bottom plate (11), a side stretching assembly (22) arranged on the top of the bottom plate (11), and a longitudinally arranged stretching assembly (23); The control unit (3) has a built-in control module for adjusting temperature and humidity according to different test requirements.

2. A ductility test tensile tester for wires and cables according to claim 1, characterized in that: The wire coiling assembly (21) comprises a wire coiling support frame (211) arranged on the top of the base plate (11), a mounting plate (212) being mounted on the top of the wire coiling support frame (211), a wire coiling plate (213) being connected to the side wall of the mounting plate (212), and a driving end (214) being mounted on a side of the wire coiling plate (213) close to the mounting plate (212).

3. A ductility test tensile tester for wires and cables according to claim 2, characterized in that: The wire coiling plate (213) is provided with a wire threading hole (216) through it, and one end of the wire coiling plate (213) away from the wire coiling support frame (211) is rotatably connected to a wire coiling column (215), and a wire following clamp (217) is provided at a position of the wire coiling plate (213) corresponding to the wire threading hole (216), and a wire coil shell (218) is sleeved on the wire coiling plate (213).

4. The ductility test tensile tester for wires and cables according to claim 1, characterized in that: The side stretching assembly (22) comprises a first slide rail (221) vertically arranged on the top of the bottom plate (11); a side stretching module (222) is slidably connected to the first slide rail (221); and a puncture module (223) is slidably connected to the side of the first slide rail (221) away from the side stretching module (222).

5. A ductility test tensile tester for wires and cables according to claim 4, characterized in that: The side stretching module (222) comprises a first side slider (2221) slidably connected to the first slide rail (221); a side mounting plate (2222) is installed on the side of the first side slider (2221) away from the coiling support frame (211); a side main part (2223) is connected to the side mounting plate (2222) away from the first side slider (2221); a rotating head (2224) is connected to the side main part (2223); and two groups of clamping heads (2225) are symmetrically connected to one end of the rotating head (2224) away from the side main part (2223).

6. A ductility test tensile tester for wires and cables according to claim 4, characterized in that: The puncture module (223) includes a second side slider (2231) slidably connected to the first slide rail (221); the second side slider (2231) is connected to a mounting block (2232) at one end away from the first slide rail (221); the mounting block (2232) is connected to a puncture body (2233); the puncture body (2233) is connected to a telescopic rod (2234) at one end away from the mounting block (2232); and the telescopic rod (2234) is connected to a puncture needle (2235).

7. A ductility test tensile tester for wires and cables according to claim 1, characterized in that: The stretching assembly (23) comprises a collecting frame (231) arranged as a hollow cuboid, and a second slide rail (234) connected to the bottom of the top plate (13); a lower stretching block (232) is slidably connected to the second slide rail (234); and an upper stretching block (233) with the same structure is arranged on the top of the lower stretching block (232).

8. A ductility test tensile tester for wires and cables according to claim 7, characterized in that: The upper stretching block (233) comprises a driving block (2331), the driving block (2331) is connected to a stretching slider (2332) slidably connected to the second slide rail (234), one side of the stretching slider (2332) is connected to a stretching body (2333), the stretching body (2333) is connected to a fixing plate (2334), and two groups of clamping heads (2335) are symmetrically arranged on the fixing plate (2334).

9. A ductility test tensile tester for wires and cables according to claim 8, characterized in that: The two groups of thread clamping heads (2335) are symmetrically arranged facing each other, and each group of thread clamping heads (2335) is provided with a group of thread clamping grooves (2336).

10. The ductility test tensile tester for wires and cables according to claim 1, characterized in that: The control module includes a temperature control module, a humidity control module, and a recording module; The temperature control module controls the temperature of the equipment according to different experimental requirements; The humidity control module controls the humidity of the equipment according to different experimental requirements; The recording module records the deformation process and data of the cable, including the elastic stage, the yield stage, the strengthening stage, the local deformation stage and the fracture stage.

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