A device for testing the combustion of electrical wires and cables

Abstract

This utility model discloses a wire and cable combustion testing device, including a test platform. Mounting grooves are provided on both sides of the upper surface of the test platform. A cable tension adjustment mechanism is detachably connected to each mounting groove. Each cable tension adjustment mechanism includes a base, and a mounting platform is integrally formed on the upper surface of the base. A limiting tension mechanism is rotatably mounted at one end of the mounting platform. An end limiting groove is provided on the top surface of the mounting platform, and a pressure block is slidably disposed inside the end limiting groove. A burner is disposed between two cable tension adjustment mechanisms on the upper surface of the test platform. The cable tension adjustment mechanism can accurately simulate the state of wires and cables under different tensions, improving the comprehensiveness of the test and its fit with actual application scenarios, ensuring the reliability, applicability, and efficiency of the wire and cable combustion test.

Description

Technical Field

[0001] This utility model relates to the field of wire and cable testing, and more specifically, to a wire and cable combustion testing device. Background Technology

[0002] In the production and application of wires and cables, flammability is one of the key indicators for evaluating their safety and reliability, leading to the development of related flammability testing devices. However, most existing flammability testing devices can only test wires and cables in a naturally relaxed or fixed tensioned state, neglecting the varying degrees of tension that wires and cables often experience in actual use due to factors such as suspension, dragging, and installation fixation. This tension can cause changes in the structure of wires and cables, such as tensile deformation of the insulation layer or sheath, and changes in the stress on the internal structure, thus affecting their flammability characteristics. Existing devices lack simulation of different tension conditions, making it difficult for test results to comprehensively reflect the flammability performance of wires and cables under complex actual working conditions. This results in insufficient test comprehensiveness and a disconnect from actual application scenarios, failing to provide sufficient data support for the safety design, selection, and standardization of wires and cables.

[0003] How to invent a wire and cable combustion testing device to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a wire and cable combustion testing device, which aims to improve the problem that existing combustion testing devices can only test wires and cables under natural relaxation or fixed tension, lack simulation of different tension conditions, resulting in insufficient comprehensiveness of test results, disconnect from actual application scenarios, and inability to provide sufficient data support for the safety design, selection and standardization of wires and cables.

[0005] This utility model is implemented as follows: A wire and cable combustion testing device includes a test platform. Mounting grooves are provided on both sides of the upper surface of the test platform. A cable tension adjustment mechanism is detachably connected to each mounting groove. Each cable tension adjustment mechanism includes a base. A mounting platform is integrally formed on the upper surface of the base. A limiting tension mechanism is rotatably mounted at one end of the mounting platform. An end limiting groove is provided on the top surface of the mounting platform. A pressure block is slidably disposed inside the end limiting groove. A burner is disposed between two cable tension adjustment mechanisms on the upper surface of the test platform.

[0006] In a preferred embodiment of this utility model, the limiting tensioning mechanism includes a Y-shaped rotating frame, which is rotatably mounted on one side surface of the mounting platform. End plates are rotatably mounted on opposite sides of the other two ends of the Y-shaped rotating frame. A mounting shaft is fixedly connected between the two end plates. A limiting groove wheel is provided on the mounting shaft. A drive motor is fixedly mounted on the other side surface of the mounting platform. One end of the output shaft of the drive motor is fixedly connected to the corresponding end surface of the Y-shaped rotating frame through a through hole.

[0007] In a preferred embodiment of this utility model, the limiting grooved wheel structure consists of two independent parts equally divided along its axis perpendicularly. Each independent part has a coaxial quarter-circular groove on one side edge. Each independent part is slidably sleeved on the mounting shaft. An adjusting screw sleeve is rotatably installed on the other side surface of each independent part. A connecting screw is threaded into the adjusting screw sleeve. One end of the connecting screw is fixedly connected to one side surface of the corresponding end plate.

[0008] In a preferred embodiment of this utility model, each of the quarter-circular grooves has a heat-insulating and anti-slip pad on its inner wall.

[0009] In a preferred embodiment of this utility model, the bottom inner wall of the end limiting groove and the bottom surface of the pressure block are provided with a number of evenly distributed toothed grooves.

[0010] In a preferred embodiment of this utility model, ear plates are integrally provided on both sides of the pressure block, and a sliding hole is provided through the surface of each ear plate. A guide slide rod is slidably connected in each sliding hole. The bottom ends of the two guide slide rods are fixedly connected to the upper surface of the base. A limiting spring is sleeved on the outside of each guide slide rod, and the two ends of the limiting spring are fixedly connected to the bottom surface of the corresponding ear plate and the upper surface of the base, respectively.

[0011] In a preferred embodiment of this utility model, a plurality of mounting slots are provided on both sides of the upper surface of the test platform, and a mounting hole is provided through the upper surface of the test platform between two corresponding mounting slots, and a burner is detachably installed in the mounting hole.

[0012] The beneficial effects of this utility model are as follows: The wire and cable combustion testing device obtained by the above design can accurately simulate the state of wires and cables under different tensions through the cable tension adjustment mechanism, which improves the comprehensiveness of the test and the fit with the actual application scenario, and ensures the reliability, applicability and efficiency of the wire and cable combustion test. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic perspective view of the overall structure provided by the embodiment of this utility model;

[0015] Figure 2 A three-dimensional schematic diagram of the overall structure of the cable tension adjustment mechanism provided for an embodiment of this utility model;

[0016] Figure 3 A schematic perspective view of the overall structure of the Y-shaped rotating frame provided for an embodiment of this utility model;

[0017] Figure 4 A perspective view of the overall structure of the pressing block provided for an embodiment of this utility model.

[0018] In the diagram: 1-Test stand; 2-Cable tension adjustment mechanism; 3-Burner; 101-Mounting groove; 102-Mounting hole; 201-Base; 202-Mounting platform; 203-Y-type rotating frame; 204-End plate; 205-Mounting shaft; 206-Limiting groove wheel; 207-Drive motor; 208-End limiting groove; 209-Pressure block; 210-Groove; 211-Adjusting screw sleeve; 212-Connecting screw; 213-Ear plate; 214-Guide slide rod; 215-Limiting spring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1 to 4This utility model provides a technical solution: a wire and cable combustion testing device, including a test platform 1. The test platform 1 has mounting grooves 101 on both sides of its upper surface. A cable tension adjustment mechanism 2 is detachably connected to each mounting groove 101. Each cable tension adjustment mechanism 2 includes a base 201. A mounting platform 202 is integrally formed on the upper surface of the base 201. A limiting tension mechanism is rotatably mounted at one end of the mounting platform 202. An end limiting groove 208 is formed on the top surface of the mounting platform 202. A pressure block 209 is slidably disposed inside the end limiting groove 208. A burner 3 is disposed between the two cable tension adjustment mechanisms 2 on the upper surface of the test platform 1.

[0021] Please see Figures 2 to 4 The limiting tensioning mechanism includes a Y-shaped rotating frame 203, which is rotatably mounted on one side surface of the mounting platform 202. End plates 204 are rotatably mounted on opposite sides of the other two ends of the Y-shaped rotating frame 203. A mounting shaft 205 is fixedly connected between the two end plates 204. A limiting groove wheel 206 is provided on the mounting shaft 205. A drive motor 207 is fixedly mounted on the other side surface of the mounting platform 202. One end of the output shaft of the drive motor 207 is fixedly connected to the corresponding end surface of the Y-shaped rotating frame 203 through a through hole.

[0022] The Y-shaped rotating frame 203 is rotatably mounted on one side of the mounting platform 202, allowing it to rotate around the mounting point and thus change the relative angle of contact with the wires and cables. End plates 204 are rotatably mounted on the other two ends of the Y-shaped rotating frame 203. A mounting shaft 205 is fixed between the two end plates 204, and a limiting grooved wheel 206 is mounted on the mounting shaft 205 to limit and support the wires and cables, ensuring that they do not detach from the mechanism during tensioning. A drive motor 207 is fixedly mounted on the other side of the mounting platform 202, with its output shaft fixedly connected to one end of the Y-shaped rotating frame 203. The operation of the drive motor 207 drives the Y-shaped rotating frame 203 to rotate, achieving automated angle adjustment and tension application. After the drive motor 207 starts, the output shaft rotates, causing the Y-shaped rotating frame 203 to rotate around the rotation point on the mounting platform 202. The rotation of the Y-shaped rotating frame 203 will drive the limit groove wheel 206 to move through the end plate 204 and the mounting shaft 205, thereby stretching the wires and cables placed on the limit groove wheel 206. By controlling the rotation angle of the drive motor 207, the degree of stretching can be precisely controlled, thereby adjusting the tension. This achieves automation and precision in tension adjustment, which is more efficient than manual adjustment and can ensure the accuracy of tension application.

[0023] Furthermore, the limiting groove wheel 206 is structured as two independent parts equally divided along its axis perpendicularly. Each independent part has a coaxial quarter-circular groove on one side surface edge. Each independent part is slidably sleeved on the mounting shaft 205. An adjusting screw sleeve 211 is rotatably installed on the other side surface of each independent part. A connecting screw 212 is threadedly connected to the adjusting screw sleeve 211. One end of the connecting screw 212 is fixedly connected to one side surface of the corresponding end plate 204.

[0024] The limiting grooved wheel 206 is divided into two independent parts perpendicular to its axis. The quarter-circular grooves on the edges of each independent part form a semi-circular groove when closed, designed to accommodate wires and cables. Each independent part is slidably fitted onto the mounting shaft 205, allowing it to move axially along the shaft and adjust the distance between the two independent parts. An adjusting screw sleeve 211 is rotatably mounted on the opposite surface of each independent part. A connecting screw 212 is threaded into the adjusting screw sleeve 211, with one end fixed to the end plate 204. Rotating the adjusting screw sleeve 211 moves the independent part along the mounting shaft 205, thereby adjusting the size of the groove formed by the two independent parts. According to the diameter of the wire and cable to be tested, rotate the adjusting sleeve 211. Since the connecting screw 212 is fixed to the end plate 204, the rotation of the adjusting sleeve 211 will cause the corresponding independent part to slide along the mounting shaft 205, thereby changing the distance between the two independent parts, so that the formed groove matches the diameter of the wire and cable, realizing stable limiting of wires and cables of different diameters, improving the adaptability of the device to wires and cables of different specifications, ensuring that the wire and cable can always be stably limited during the test, and ensuring the accuracy of the test.

[0025] Furthermore, each quarter-circular groove has a heat-insulating and anti-slip pad on its inner wall.

[0026] The heat-resistant and anti-slip pad is made of a material with high temperature resistance and high friction. When the wire or cable is placed in the groove, the anti-slip pad increases the friction between the pad and the wire or cable, preventing slippage during stretching and combustion, and ensuring the stability of the applied tension. Simultaneously, the heat-resistant properties reduce the damage to the limiting groove wheel 206 caused by heat transferred from the flame during combustion, extending its service life. The heat-resistant and anti-slip pad is pre-installed on the inner wall of the quarter-circular groove. When the wire or cable is placed in the groove formed by the two independent parts, the pad is in close contact with the surface of the wire or cable, providing sufficient friction to prevent slippage during stretching and blocking some heat during combustion. Without affecting the basic function of the limiting groove wheel 206, the addition of the heat-resistant and anti-slip pad further improves the limiting stability of the wire or cable, while protecting the limiting groove wheel 206, thus improving the reliability and durability of the device.

[0027] Furthermore, the bottom inner wall of the end limiting groove 208 and the bottom surface of the pressure block 209 are provided with several evenly distributed toothed grooves 210.

[0028] The end of the wire / cable is placed into the end limiting groove 208, and the pressure block 209 is pushed to slide downwards. The toothed groove 210 at the bottom of the pressure block 209 engages with the toothed groove 210 at the bottom of the end limiting groove 208, thus locking and fixing the end of the wire / cable from both the top and bottom. The toothed groove 210 ensures that the end of the wire / cable remains in a stable fixed state during the test, providing a guarantee for the stable application of tension.

[0029] Furthermore, ear plates 213 are integrally provided on both sides of the pressure block 209. Each ear plate 213 has a through hole, and a guide rod 214 is slidably connected in each hole. The bottom ends of the two guide rods 214 are fixedly connected to the upper surface of the base 201. Each guide rod 214 is fitted with a limiting spring 215. The two ends of the limiting spring 215 are fixedly connected to the bottom surface of the corresponding ear plate 213 and the upper surface of the base 201, respectively.

[0030] The ear plate 213 and the pressure block 209 are integrally formed, providing an installation position for the sliding hole. The guide rod 214 passes through the sliding hole and guides the sliding of the pressure block 209, ensuring that the pressure block 209 can only slide vertically up and down, preventing it from deviating during sliding. The limiting spring 215 is sleeved on the outside of the guide rod 214, and its two ends are fixedly connected to the bottom surface of the ear plate 213 and the upper surface of the base 201, respectively. When the pressure block 209 is lifted upward, the limiting spring 215 is stretched, generating a downward elastic force. When the pressure block 209 is released, the elastic force drives the pressure block 209 to slide downward, automatically pressing the end of the wire or cable. When it is necessary to place the end of the wire or cable, lift the pressure block 209 upward, the limiting spring 215 is stretched, and after placing the end of the wire or cable into the end limiting groove 208, release the pressure block 209. Under the elastic force of the limiting spring 215, the pressure block 209 slides downward along the guide rod 214, pressing the end of the wire or cable. The pressure block 209 is automatically tightened by the elastic force of the spring, which is convenient to operate. At the same time, the elastic tightening method can adapt to the ends of wires and cables of different diameters, avoiding damage to the wires and cables due to excessive tightness and unstable fixation due to excessive looseness, thus improving the flexibility and reliability of end fixing.

[0031] Please see Figure 1 The test bench 1 has multiple mounting slots 101 on both sides of its upper surface. A mounting hole 102 is provided between two corresponding mounting slots 101 on the upper surface of the test bench 1. A burner 3 can be detachably installed in the mounting hole 102.

[0032] Multiple mounting slots 101 allow for the simultaneous installation of multiple sets of cable tension adjustment mechanisms 2, enabling simultaneous combustion tests on multiple sets of wire and cable samples and improving testing efficiency. Based on the required number of tests, a corresponding number of cable tension adjustment mechanisms 2 are installed in the multiple mounting slots 101. Multiple sets of wire and cable samples are then installed between their respective cable tension adjustment mechanisms 2. The burner 3 is then installed in a suitable position through the mounting holes 102, allowing it to perform combustion tests on the corresponding samples. The design of multiple mounting slots 101 enables simultaneous testing of multiple samples, saving testing time and improving work efficiency. The detachable installation of the burner 3 increases testing flexibility and better meets the needs of different testing scenarios.

[0033] Working principle: First, according to the test requirements, install the corresponding number of cable tension adjustment mechanisms 2 through the mounting slots 101 on the test bench 1, and install the corresponding number of burners 3 in appropriate positions through the mounting holes 102; then, place the wires and cables on two corresponding limiting groove wheels 206, and according to the cable diameter, rotate the adjusting screw sleeve 211 to drive the two independent parts of the limiting groove wheel 206 to slide along the mounting shaft 205 to adjust the spacing. At the same time, place both ends of the cable in the end limiting grooves 208, lift the pressure block 209 and use the elastic force of the limiting spring 215 to reset the pressure block 209, and use the toothed groove 210 to fix the ends; then, control the drive motor 207 to drive the Y-shaped rotating frame 203 to rotate, and adjust the cable tension by changing the angle of the two corresponding Y-shaped rotating frames 203, and the heat-resistant and anti-slip pads on the limiting groove wheels 206 ensure the stability of the cable; finally, start the burners 3 to conduct combustion tests on the cables under different tensions. Multiple sets of mounting slots 101 can realize the simultaneous testing of multiple sets of samples.

[0034] It should be noted that the specific models and specifications of the drive motor 207 and burner 3 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0035] The power supply and principle of the drive motor 207 and the burner 3 are clear to those skilled in the art and will not be described in detail here.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for testing the combustion of electrical wires and cables, characterized in that, The device includes a test stand, on both sides of the test stand's upper surface, with mounting slots. Each mounting slot is detachably connected to a cable tension adjustment mechanism. Each cable tension adjustment mechanism includes a base, with a mounting platform integrally formed on the upper surface of the base. A limiting tension mechanism is rotatably mounted on one end of the mounting platform. An end limiting groove is formed on the top surface of the mounting platform, and a pressure block is slidably disposed inside the end limiting groove. A burner is disposed between two cable tension adjustment mechanisms on the upper surface of the test stand.

2. The wire and cable combustion testing device as described in claim 1, characterized in that: The limiting tensioning mechanism includes a Y-shaped rotating frame, which is rotatably mounted on one side surface of the mounting platform. End plates are rotatably mounted on opposite sides of the other two ends of the Y-shaped rotating frame. A mounting shaft is fixedly connected between the two end plates. A limiting groove wheel is provided on the mounting shaft. A drive motor is fixedly mounted on the other side surface of the mounting platform. One end of the output shaft of the drive motor is fixedly connected to the corresponding end surface of the Y-shaped rotating frame through a through hole.

3. The wire and cable combustion testing device as described in claim 2, characterized in that: The limiting grooved wheel structure consists of two independent parts that are equally divided along its axis perpendicularly. Each independent part has a coaxial quarter-circular groove on one side of its surface edge. Each independent part is slidably sleeved on the mounting shaft. An adjusting screw sleeve is rotatably installed on the other side of each independent part. A connecting screw is threaded into the adjusting screw sleeve. One end of the connecting screw is fixedly connected to one side of the corresponding end plate.

4. The wire and cable combustion testing device as described in claim 3, characterized in that: Each of the quarter-circular grooves has a heat-insulating and anti-slip pad on its inner wall.

5. The wire and cable combustion testing device as described in claim 1, characterized in that: The bottom inner wall of the end limiting groove and the bottom surface of the pressure block are both provided with several evenly distributed toothed grooves.

6. The wire and cable combustion testing device as described in claim 1, characterized in that: Both sides of the pressure block are integrally provided with ear plates, and each ear plate has a through hole. A guide rod is slidably connected in each of the sliding holes. The bottom ends of the two guide rods are fixedly connected to the upper surface of the base. Each guide rod is fitted with a limiting spring, and the two ends of the limiting spring are fixedly connected to the bottom surface of the corresponding ear plate and the upper surface of the base, respectively.

7. The wire and cable combustion testing device as described in claim 1, characterized in that: The test platform has multiple mounting slots on both sides of its upper surface. A mounting hole is formed between two corresponding mounting slots on the upper surface of the test platform, and a burner can be detachably installed in the mounting hole.

Images