Tension testing device for cable

Abstract

The utility model discloses a tension testing device for a cable. The tension testing device comprises a test board; the stretching unit is arranged in the test bench, the stretching unit is used for stretching the two ends of the cable, the stretching unit is provided with a fixing assembly, and the fixing assembly is used for fixing the two ends of the cable; and the hoisting unit is arranged in the test bench, and the hoisting unit is used for hoisting the center of the cable. According to the utility model, the stretching unit is matched with the fixing assembly, so that the two ends of the cable are accurately and stably fixed, the tension is applied, the tension is uniformly and adjustably applied, the accuracy of test data is ensured, and the hoisting unit simulates a suspension stress scene in actual use of the cable and moves synchronously with the stretching unit; the multi-directional stress test of the cable is realized, the performance of the cable is reflected more truly, meanwhile, the guide assembly provides stable guidance for the hoisting unit, the hoisting process is ensured to be stable, and test errors are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of cable testing, and in particular to a tensile testing device for cables. Background Technology

[0002] A cable is an electrical energy or signal transmission device, typically consisting of one or more mutually insulated conductors and an outer protective covering material. As a key carrier for electrical energy and signal transmission, its quality and performance directly affect the safe and stable operation of the entire system.

[0003] In the production and use of cables, tensile testing is one of the key steps in evaluating cable quality. It can effectively assess the mechanical properties, structural stability, and insulation performance of cables under stress, and promptly detect potential problems such as conductor connection defects and weak points in the insulation layer, thus avoiding safety accidents such as breakage and leakage caused by insufficient tensile strength of the cable.

[0004] In existing technologies, conventional cable tensile tests mostly apply unidirectional tensile force to both ends of the cable and evaluate its mechanical properties by measuring parameters such as the cable's breaking load and elongation. The test data is relatively simple. However, the combined effects of gravity, wind force, and drag force during installation on cables in overhead laying or other similar scenarios result in an extremely complex stress state, which is not conducive to a comprehensive and accurate assessment of the cable's strength under actual working conditions. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems existing in the current cable tensile testing device, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a cable tensile testing device to solve the problem that "most conventional cable tensile tests only apply unidirectional tensile force to both ends of the cable and evaluate its mechanical properties by measuring parameters such as the cable's breaking load and elongation. The test data is relatively simple. However, the combined effects of gravity, wind force, and drag force during installation on cables in overhead laying or other similar scenarios result in an extremely complex stress state, which is not conducive to comprehensively and accurately evaluating the cable's strength under actual working conditions."

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: including:

[0009] Test bench;

[0010] A tensioning unit is installed inside the test bench. The tensioning unit is used to stretch both ends of the cable. A fixing component is provided on the tensioning unit to fix both ends of the cable.

[0011] The lifting unit is installed inside the test bench. The lifting unit is used to lift the center of the cable. The lifting unit is equipped with a guide component, which is used to guide the lifting unit to move up and down.

[0012] In a preferred embodiment of the cable tensile testing device of this utility model, the tensile unit includes a bidirectional lead screw, the two ends of which are rotatably connected to the inner walls of both sides of the test platform. Each of the two arms of the bidirectional lead screw is threaded with a moving block. Two guide rods are fixedly connected to the inner walls of both sides of the test platform. Both guide rods movably pass through the corresponding moving blocks. A reciprocating motor is fixedly connected to one side surface of the test platform. The output end of the reciprocating motor is fixedly connected to one end of the bidirectional lead screw. A rangefinder is fixedly connected to the test platform.

[0013] In a preferred embodiment of the cable tensile testing device of this utility model, the fixing component includes multiple vertical plates, which are respectively fixedly connected to the top surface of the corresponding moving blocks. Each of the multiple vertical plates is threaded with a screw rod, one end of each screw rod is fixedly connected with a knob, and the other end of each screw rod is rotatably connected with a clamping block. The top surfaces of the two moving blocks are provided with grooves, and the clamping blocks are slidably connected in the corresponding grooves.

[0014] In a preferred embodiment of the cable tensile testing device of this utility model, the lifting unit includes a bracket, which is fixedly connected to the inner wall of one side of the test bench. A lifting rope is movably mounted on the bracket, and a lifting block is fixedly connected to one end of the lifting rope. A baffle is hinged to the lifting block. A reel is fixedly connected to the center of the arm of the bidirectional screw, and the reel is fixedly connected to the other end of the lifting rope. A guide block is fixedly connected to the center of the arm of one of the guide rods, and the lifting rope moves through the guide block on the side near the bracket.

[0015] In a preferred embodiment of the cable tensile testing device of this utility model, the guide component includes a groove, which is formed on the inner wall of one side of the bracket. A slider is slidably connected in the groove, and the slider is fixedly connected to the suspension rope. The suspension rope moves through the slider on the side near the bracket.

[0016] In a preferred embodiment of the cable tensile testing device of the present invention, the inner walls of the plurality of clamping blocks are all fixedly connected with elastic pads, and the plurality of elastic pads are provided with anti-slip textures.

[0017] In a preferred embodiment of the cable tensile testing device of this utility model, the bottom surface of the test platform is fixedly connected to two slide rails, and a storage frame is slidably connected in both slide rails.

[0018] In a preferred embodiment of the cable tensile testing device of this utility model, the storage frame is fixedly connected to two side plates, and both plates are slidably connected to corresponding slide rails.

[0019] The beneficial effects of this utility model are:

[0020] 1. By cooperating with the tensioning unit and the fixing component, the two ends of the cable are precisely and stably fixed and tension is applied, ensuring that the tension is applied evenly and is adjustable, thus guaranteeing the accuracy of the test data. The lifting unit simulates the suspension stress scenario of the cable in actual use and moves synchronously with the tensioning unit to realize multi-directional stress testing of the cable, which more realistically reflects the cable performance. At the same time, the guide component provides stable guidance for the lifting unit, ensuring a smooth lifting process and reducing test errors. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a frontal schematic diagram of the overall structure of a cable tensile testing device proposed in this utility model;

[0023] Figure 2 for Figure 1 A magnified structural diagram of region A;

[0024] Figure 3 for Figure 1 A magnified structural diagram of region B;

[0025] Figure 4 This is a side view of the overall structure of a cable tensile testing device proposed in this utility model.

[0026] In the picture:

[0027] 100. Test stand; 101. Slide rail; 102. Storage frame; 103. Tray;

[0028] 200. Tensioning unit; 201. Bidirectional lead screw; 202. Moving block; 203. Guide rod; 204. Reciprocating motor; 205. Rangefinder;

[0029] 300. Fixing component; 301. Vertical plate; 302. Screw; 303. Clamping block; 304. Groove; 3031. Elastic pad;

[0030] 400. Lifting unit; 401. Bracket; 402. Lifting rope; 403. Lifting block; 404. Baffle; 405. Winding reel; 406. Guide block;

[0031] 500, guide assembly; 501, slide; 502, slider. Detailed Implementation

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0035] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0036] Example 1

[0037] Reference Figures 1 to 3 This is the first embodiment of the present utility model, which provides the following achievable effects:

[0038] Test bench 100;

[0039] Tensioning unit 200 is set inside test bench 100. Tensioning unit 200 is used to stretch both ends of cable. Tensioning unit 200 is provided with fixing component 300, which is used to fix both ends of cable.

[0040] The lifting unit 400 is installed inside the test bench 100. The lifting unit 400 is used to lift the center of the cable. The lifting unit 400 is equipped with a guide component 500, which is used to guide the lifting unit 400 to move up and down.

[0041] In use, the tensioning unit 200 cooperates with the fixing component 300 to accurately and stably fix both ends of the cable and apply tension, ensuring that the tension is applied evenly and is adjustable, thus guaranteeing the accuracy of the test data. The lifting unit 400 simulates the suspension stress scenario of the cable in actual use and moves synchronously with the tensioning unit 200 to realize multi-directional stress testing of the cable, which more realistically reflects the cable performance. At the same time, the guide component 500 provides stable guidance for the lifting unit 400, ensuring a smooth lifting process and reducing test errors.

[0042] Example 2

[0043] Reference Figures 1 to 3 This is the second embodiment of the present invention, which differs from the previous embodiment in that...

[0044] The tensile unit 200 includes a bidirectional lead screw 201, with both ends of the bidirectional lead screw 201 rotatably connected to the inner walls of both sides of the test platform 100. Each of the two arms of the bidirectional lead screw 201 is threadedly connected to a moving block 202. Two guide rods 203 are fixedly connected to the inner walls of both sides of the test platform 100. Both guide rods 203 movably pass through the corresponding moving block 202. A reciprocating motor 204 is fixedly connected to one side surface of the test platform 100. The output end of the reciprocating motor 204 is fixedly connected to one end of the bidirectional lead screw 201. A rangefinder 205 is fixedly connected to the test platform 100.

[0045] The reciprocating motor 204 is started to drive the bidirectional lead screw 201 to rotate, causing the two moving blocks 202 on both sides to move away from each other, thereby stretching both ends of the cable. This allows the rangefinder 205 to monitor the changes in cable tension. Before the cable tension test, the rangefinder 205 first measures the length of the cable in its initial state, that is, records the distance between the two ends of the cable and the rangefinder 205. When tension is applied to the cable, the cable will undergo elastic or plastic deformation, resulting in an increase in length. The rangefinder 205 continuously monitors the changes in the distance between the two ends of the cable and itself. By calculating the difference between the two measured distances, the elongation of the cable under tension can be obtained. Conventionally, laser ranging technology is used. The rangefinder 205 emits a laser pulse, which is reflected back after encountering the cable surface and received by the receiver of the rangefinder 205. This is the existing technology.

[0046] Specifically, the fixing component 300 includes multiple vertical plates 301, which are fixedly connected to the top surface of the corresponding moving blocks 202. Each of the multiple vertical plates 301 is threaded with a screw 302. One end of each screw 302 is fixedly connected with a knob, and the other end of each screw 302 is rotatably connected with a clamping block 303. The top surface of each of the two moving blocks 202 is provided with a groove 304, and the multiple clamping blocks 303 are slidably connected in the corresponding groove 304.

[0047] Multiple vertical plates 301 are arranged in pairs. When the screw 302 is rotated by the knob, it can drive the clamping block 303 at the other end to move horizontally. The groove 304 guides the clamping block 303 to ensure the stability of the horizontal movement and prevent the rotation from affecting the normal use of the clamping block 303. One side of the clamping block 303 is arc-shaped, which makes it easy to fit the surface of the cable for fixed clamping.

[0048] Specifically, the lifting unit 400 includes a bracket 401, which is fixedly connected to the inner wall of one side of the test bench 100. A lifting rope 402 is movably mounted on the bracket 401. A lifting block 403 is fixedly connected to one end of the lifting rope 402. A baffle 404 is hinged to the lifting block 403. A winding wheel 405 is fixedly connected to the center of the arm of the bidirectional lead screw 201. The winding wheel 405 is fixedly connected to the other end of the lifting rope 402. A guide block 406 is fixedly connected to the center of the arm of one of the guide rods 203. The lifting rope 402 moves through the guide block 406 on the side near the bracket 401.

[0049] The cable center can be placed inside the lifting block 403, and the baffle 404 is hinged and can only rotate upward. When the tensioning unit 200 is working, the reel 405 winds up the lifting rope 402, causing the other end of the lifting rope 402 to move the lifting block 403 upward, simulating the gravity and tension experienced by the cable in overhead laying or other similar scenarios. Targeted tests can be performed according to the cable's needs. If only the horizontal tension of the cable needs to be tested, it is not necessary to place the cable center inside the lifting block 403. The guide block 406 guides the lifting rope 402.

[0050] Specifically, the guide component 500 includes a slide 501, which is formed on one inner wall of the bracket 401. A slider 502 is slidably connected in the slide 501. The slider 502 is fixedly connected to the suspension rope 402, and the suspension rope 402 moves through the slider 502 on the side near the bracket 401.

[0051] When in use, when the lifting rope 402 is wound up, the end of the lifting rope 402 located on one side of the lifting block 403 drives the slider 502 to move upward, and the slider 502 slides in the groove 501, which guides the lifting of the lifting rope 402. The lifting rope 402 on the side closer to the bracket 401 moves through the slider 502, which facilitates the winding or unwinding of the lifting rope 402, thus achieving a dual guiding effect for the lifting rope 402.

[0052] Example 3

[0053] Reference Figures 2 to 4 This is the third embodiment of the present invention, which differs from the previous embodiment in that...

[0054] The inner walls of multiple clamping blocks 303 are all fixedly connected with elastic pads 3031, and the multiple elastic pads 3031 are all provided with anti-slip textures.

[0055] The elasticity of the 3031 elastic pad prevents damage to the cable when it is stretched and fixed at both ends, while the anti-slip texture improves the clamping effect on both ends of the cable, ensuring a firm stretch.

[0056] Specifically, the bottom surface of the test platform 100 is fixedly connected to two slide rails 101, and a storage frame 102 is slidably connected in both slide rails 101.

[0057] The storage box 102 is slidably set inside the slide rail 101, which is convenient for personnel to operate and saves time and effort. The storage box 102 can hold test workpieces and data, which is convenient for subsequent retrieval and use or for comparison with paper data.

[0058] Specifically, two trays 103 are fixedly connected to the two sides of the storage frame 102, and both trays 103 are slidably connected to the corresponding slide rails 101.

[0059] In use, the tray 103 slides on the slide rail 101, improving the sliding connection of the storage box 102, and the tray 103 also facilitates the handling of the storage box 102 by personnel.

[0060] During use, both ends of the cable are placed in the clamps 303 on both sides, and then the knob is turned to make the screw 302 move the clamps 303 closer together. The cable is clamped and fixed by the elastic pad 3031 and the anti-slip texture. The clamps 303 can slide in the grooves 304 to ensure stable clamping. The reciprocating motor 204 is started to drive the bidirectional lead screw 201 to rotate, so that the two moving blocks 202 on both sides move away from each other along the guide rod 203, thereby applying tension to the cable. The rangefinder 205 monitors the length change of the cable in real time during the tensile process, providing data support for tensile testing. The center of the cable can be placed in the hanging block 403. When the bidirectional lead screw 201 rotates, the cable is clamped and fixed by the elastic pad 3031 and the anti-slip texture. When 01 rotates, the reel 405 at the center of its arm rotates accordingly, winding and unwinding the lifting rope 402. At the same time, the lifting rope 402, guided by the guide block 406 and the slider 502, drives the lifting block 403 to move up and down, thereby applying an upward lifting force to the center of the cable. The baffle 404 hinged on the lifting block 403 can prevent the cable from slipping off the lifting block 403, simulating the combined effect of gravity and tension on the cable in overhead laying or other similar scenarios, making the test closer to the real working conditions, and enabling a more comprehensive evaluation of the mechanical performance, insulation performance, etc. of the cable under complex stress conditions. The storage box 102 is convenient for storing test tools and recording test data.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tension testing device for electrical cables, characterized by: include: Test stand (100); A tensioning unit (200) is provided inside the test bench (100). The tensioning unit (200) is used to stretch both ends of the cable. A fixing component (300) is provided on the tensioning unit (200) and is used to fix both ends of the cable. A lifting unit (400) is provided inside the test bench (100). The lifting unit (400) is used to lift the center of the cable. A guide component (500) is provided inside the lifting unit (400). The guide component (500) is used to guide the lifting unit (400) to move up and down.

2. A pull test device for a cable according to claim 1, characterized in that: The tensile unit (200) includes a bidirectional lead screw (201), with both ends of the bidirectional lead screw (201) rotatably connected to the inner walls of both sides of the test platform (100). The two arms of the bidirectional lead screw (201) are threadedly connected to moving blocks (202). The inner walls of both sides of the test platform (100) are fixedly connected to two guide rods (203), and the two guide rods (203) movably pass through the corresponding moving blocks (202). A reciprocating motor (204) is fixedly connected to one side surface of the test platform (100), and the output end of the reciprocating motor (204) is fixedly connected to one end of the bidirectional lead screw (201). A rangefinder (205) is fixedly connected to the test platform (100).

3. A pull test device for a cable according to claim 2, wherein: The fixing component (300) includes multiple vertical plates (301), which are fixedly connected to the top surface of the corresponding moving blocks (202). Each of the multiple vertical plates (301) is threaded with a screw (302). One end of each screw (302) is fixedly connected with a knob, and the other end of each screw (302) is rotatably connected with a clamping block (303). The top surfaces of the two moving blocks (202) are provided with grooves (304), and the clamping blocks (303) are slidably connected in the corresponding grooves (304).

4. A pull test device for a cable according to claim 3, wherein: The lifting unit (400) includes a bracket (401), which is fixedly connected to the inner wall of one side of the test bench (100). A lifting rope (402) is movably mounted on the bracket (401). One end of the lifting rope (402) is fixedly connected to a lifting block (403). A baffle (404) is hinged on the lifting block (403). A reel (405) is fixedly connected to the center of the arm of the bidirectional screw (201). The reel (405) is fixedly connected to the other end of the lifting rope (402). A guide block (406) is fixedly connected to the center of the arm of one of the guide rods (203). The lifting rope (402) moves through the guide block (406) on the side near the bracket (401).

5. A pull test device for a cable according to claim 4, wherein: The guide assembly (500) includes a slide groove (501), which is formed on the inner wall of one side of the bracket (401). A slider (502) is slidably connected in the slide groove (501). The slider (502) is fixedly connected to the suspension rope (402), and the suspension rope (402) moves through the slider (502) on the side of the bracket (401).

6. A pull test device for a cable according to claim 5, wherein: The inner walls of the multiple clamping blocks (303) are all fixedly connected with elastic pads (3031), and the multiple elastic pads (3031) are provided with anti-slip textures.

7. A pull test device for a cable according to claim 6, wherein: The bottom surface of the test bench (100) is fixedly connected to two slide rails (101), and a storage frame (102) is slidably connected in both slide rails (101).

8. A pull test device for a cable according to claim 7, wherein: The storage frame (102) has two trays (103) fixedly connected to its two sides, and both trays (103) are slidably connected to the corresponding slide rails (101).

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