A wear resistance testing device for the production of all-plastic low-voltage power cables

Abstract

This application belongs to the field of cable abrasion resistance testing technology, and discloses an abrasion resistance testing device for the production of all-plastic low-voltage power cables. The device includes a base and a vertical plate. A set of fixed friction wheels is arranged on the front of the vertical plate, and a positioning rod is fixedly welded between each fixed friction wheel and the vertical plate. A bracket is arranged below the fixed friction wheels, and two moving friction wheels are placed inside the bracket. Guide blocks are fixedly welded to both sides of the moving friction wheels. Guide grooves are formed on the bracket corresponding to the positions of the guide blocks. S-type tension and compression sensors are fixedly installed on the upper inner wall of the bracket, directly opposite the moving friction wheels. This application allows the S-type tension and compression sensors to simultaneously detect the pressure exerted by the cable on the fixed and moving friction wheels while adjusting the initial tension of the cable. As the worn portion of the cable becomes thinner, the pressure detected by the S-type tension and compression sensors decreases synchronously. After data processing and calculation, the abrasion resistance test data of the cable can be quickly obtained.

Description

Technical Field

[0001] This application relates to the field of cable abrasion resistance testing technology, and more specifically, to an abrasion resistance testing device for the production of all-plastic low-voltage power cables. Background Technology

[0002] Cables are a general term for conductors used to transmit electrical energy, signals, or data. They typically consist of a conductor, insulation layer, shielding layer, and sheath, forming a complex system designed for a specific environment. According to International Electrotechnical Commission (IEC) standards and Chinese national standards, cables with a rated voltage of 1kV and below are classified as low-voltage power cables. During the production of low-voltage power cables, it is often necessary to cut a certain length of cable for abrasion resistance testing.

[0003] However, some cable abrasion testing devices on the market have certain limitations. Specifically, when testing the abrasion resistance of different parts of the same cable, multiple tests are often required to ensure the testing effect. The number of friction points tested simultaneously is too small and not intuitive enough, which needs further improvement. Summary of the Invention

[0004] To address the aforementioned issues, this application provides an abrasion resistance testing device for the production of all-plastic low-voltage power cables.

[0005] The wear resistance testing device for the production of all-plastic low-voltage power cables provided in this application adopts the following technical solution: A wear-resistant testing device for the production of all-plastic low-voltage power cables includes a base and a vertical plate. A set of fixed friction wheels is arranged on the front of the vertical plate. Each fixed friction wheel is fixedly welded to the vertical plate with a positioning rod. A bracket is arranged below each fixed friction wheel. Two moving friction wheels are placed inside the bracket. Guide blocks are fixedly welded to both sides of each moving friction wheel. Guide grooves are formed on the bracket corresponding to the positions of the guide blocks. S-shaped tension and compression sensors are fixedly installed on the upper inner wall of the bracket, directly opposite the moving friction wheels. The same cable is wound between the friction wheel and the moving friction wheel. An adjustment mechanism for adjusting the initial tension of the cable is provided on the vertical plate. A crossbar is provided below the bracket. The middle part of the crossbar is rotatably connected to the vertical plate. A second servo motor is fixedly installed on the reverse side of the vertical plate. The output end of the second servo motor is fixed to the middle part of the crossbar through a coupling. A limiting groove is provided at both ends of the crossbar. A cylindrical rod is movably arranged inside the limiting groove. A locking component for fixing the cable end is provided at the front end of the cylindrical rod.

[0006] Furthermore, the adjustment mechanism includes a threaded rod and two supports, both of which are fixedly welded to the vertical plate. The threaded rod is rotatably connected between the two supports. The support has a first threaded hole that matches the threaded rod. A first servo motor is provided at the bottom of the lower support. The output end of the first servo motor is connected to the bottom end of the threaded rod through a coupling.

[0007] Furthermore, the vertical plate has a first groove corresponding to the position of the first servo motor, and a first slider is slidably connected to the inner side of the first groove. The first slider extends to the outside of the first groove and is fixed to the bracket.

[0008] Furthermore, the locking component includes a lock head, which is fixedly welded to the front end of the cylindrical rod. The lock head has through cable holes on its upper and lower sides, and a second threaded hole is provided on the front side of the lock head. A locking bolt is threaded into the second threaded hole.

[0009] Furthermore, a second sliding groove is provided at each position of the vertical plate corresponding to the cylindrical rod, and a second slider is slidably connected to the inner side of the second sliding groove, and the rear end of the cylindrical rod is fixed to the second slider.

[0010] Furthermore, a power supply box is fixedly installed on the top of the base and near the second servo motor.

[0011] Furthermore, a control panel is fixedly installed on the vertical plate, and the first servo motor, power supply box, second servo motor and S-shaped tension and compression sensor are all electrically connected to the control panel.

[0012] Furthermore, a through-hole is provided on both sides of the vertical plate at the position corresponding to the S-shaped tension and compression sensor, and the wires that electrically connect the S-shaped tension and compression sensor to the control panel pass through the through-hole.

[0013] Furthermore, the first groove is located between the two supports, and the two dynamic friction wheels are symmetrical about the first groove.

[0014] Furthermore, both the fixed friction wheel and the moving friction wheel are "H" shaped, and the inner axial surfaces of both the fixed friction wheel and the moving friction wheel are rough surfaces with the same coefficient of friction.

[0015] In summary, this application includes at least one of the following beneficial technical effects: While adjusting the initial tension of the cable, this application can simultaneously enable the S-type tension and compression sensor to detect the pressure applied by the cable to the fixed friction wheel and the moving friction wheel. When the worn part of the cable becomes thinner, the pressure detected by the S-type tension and compression sensor decreases synchronously. After data processing and calculation, the wear resistance test data of the cable can be quickly obtained. This application has multiple friction points, which allows for a more intuitive comparison of multiple worn parts of the cable after it has been disassembled, thereby further improving the accuracy of the inspection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of this application; Figure 2 This is a schematic diagram of the structure of the stent in this application; Figure 3 This is a schematic diagram of the crossbar structure in this application; Figure 4 This is a schematic diagram of the lock head structure in this application; Figure 5 This is a schematic diagram of the reverse structure of this application.

[0017] Explanation of the labels in the diagram: 1. Base; 2. Vertical plate; 21. First slide groove; 211. First slider; 22. Reserved groove; 23. Second slide groove; 231. Second slider; 3. Fixed friction wheel; 4. Moving friction wheel; 41. Guide block; 5. Positioning rod; 6. Support; 7. Threaded rod; 8. First servo motor; 9. Bracket; 91. Guide groove; 92. S-shaped tension / compression sensor; 93. First threaded hole; 10. Control panel; 11. Power supply box; 12. Second servo motor; 13. Horizontal bar; 131. Limit groove; 132. Cylindrical rod; 14. Lock head; 141. Cable hole; 142. Second threaded hole; 143. Locking bolt. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0021] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0022] This application discloses an abrasion resistance testing device for the production of all-plastic low-voltage power cables, including a base 1 and a vertical plate 2. The vertical plate 2 is fixedly welded to the middle position of the top of the base 1. Please refer to [link to relevant documentation]. Figure 1 The front of the vertical plate 2 is provided with a set of three horizontally spaced fixed friction wheels 3, and each fixed friction wheel 3 is fixedly welded to the vertical plate 2 with a positioning rod 5, which keeps the fixed friction wheel 3 suspended in the air; please refer to Figure 2 It should be noted that a bracket 9 is installed below the fixed friction wheel 3. The bracket 9 is U-shaped, and two symmetrically distributed moving friction wheels 4 are placed on the inner side of the bracket 9. The fixed friction wheel 3 and the moving friction wheel 4 are wound with the same cable. To reduce the possibility of the cable accidentally coming loose, both the fixed friction wheel 3 and the moving friction wheel 4 are H-shaped. Please refer to... Figure 2 As shown, square guide blocks 41 are fixedly welded to both sides of the moving friction wheel 4. The bracket 9 has strip-shaped guide grooves 91 at positions corresponding to the guide blocks 41, and the guide blocks 41 are embedded in the corresponding guide grooves 91. Furthermore, S-shaped tension / compression sensors 92 are fixedly installed on the upper inner wall of the bracket 9, directly opposite the moving friction wheel 4. Before the cable is wound around the wheel, the moving friction wheel 4 and the guide blocks 41 are affected by their own weight and will not contact the S-shaped tension / compression sensors 92; they will only remain within the range of the S-shaped tension / compression sensors. Directly below 92, after the cable is threaded through and its two ends are fixed, the cable exerts an upward pulling force on the moving friction wheel 4, causing the moving friction wheel 4 to exert pressure on the S-shaped tension and compression sensor 92, thereby obtaining the initial tension of the cable. It can be understood that, in order to improve the accuracy of detection, the inner axial surfaces of the fixed friction wheel 3 and the moving friction wheel 4 are rough surfaces with the same coefficient of friction. In order to adjust the initial tension of the cable (i.e., the pressure exerted by the cable on the fixed friction wheel 3 and the moving friction wheel 4), an adjustment mechanism is provided on the vertical plate 2.

[0023] More specifically, the adjustment mechanism includes a threaded rod 7 and two supports 6, both of which are fixedly welded to the vertical plate 2. The threaded rod 7 is rotatably connected between the two supports 6. A first threaded hole 93 matching the threaded rod 7 is provided on the bracket 9, through which the threaded rod 7 passes. A first servo motor 8 is provided at the bottom of the lower support 6, mounted on the vertical plate 2. The output end of the first servo motor 8 is connected to the bottom end of the threaded rod 7 via a coupling. By controlling the operation of the first servo motor 8, the threaded rod 7 is driven to rotate, which facilitates the adjustment of the overall height of the bracket 9 and the dynamic friction wheel 4. When the bracket 9 and the dynamic friction wheel 4 move downward as a whole, the cable is gradually stretched and tightened, and the tension increases accordingly. During this process, the cable will dynamic friction... The friction wheel 4 and guide block 41 move upward along the guide groove 91. When the upper edge of the moving friction wheel 4 abuts against the bottom of the S-type tension and pressure sensor 92, the S-type tension and pressure sensor 92 detects the pressure and obtains the tension data of the cable. When the tension reaches the set range, the first servo motor 8 stops working, and the bracket 9 and the moving friction wheel 4 remain at the height before stopping. It can be understood that in order to ensure the stability of the bracket 9 in the vertical direction, the vertical plate 2 is provided with a first sliding groove 21 corresponding to the position of the first servo motor 8. The inner side of the first sliding groove 21 is slidably connected to the first slider 211. The first slider 211 extends to the outside of the first sliding groove 21 and is fixed to the bracket 9. The first sliding groove 21 is located between the two supports 6, and the two moving friction wheels 4 are symmetrical about the first sliding groove 21.

[0024] Please combine Figure 1 , Figure 3 and Figure 4To drive the cable to reciprocate, a crossbar 13 is provided below the bracket 9. The middle of the crossbar 13 is rotatably connected to the vertical plate 2. A second servo motor 12 is fixedly installed on the reverse side of the vertical plate 2. The output end of the second servo motor 12 is fixed to the middle of the crossbar 13 via a coupling. It can be understood that by controlling the forward and reverse rotation of the second servo motor 12, the crossbar 13 can be driven to reciprocate around its own center point, thereby causing the two ends of the crossbar 13 to swing up and down. It should be noted that each end of the crossbar 13 has a limiting groove 131. A cylindrical rod 132 is movably arranged inside the limiting groove 131. The front end of the cylindrical rod 132 is provided with a locking component for fixing the cable end. Furthermore, the vertical plate 2 has a second sliding groove 23 corresponding to the position of the cylindrical rod 132. A second slider 231 is slidably connected inside the second sliding groove 23. The rear end of 32 is fixed to the second slider 231. When the two ends of the crossbar 13 swing up and down, the crossbar 13 applies a pushing force to the cylindrical rod 132 in its limiting groove 131, so that the cylindrical rod 132 and the second slider 231 move together along the second sliding groove 23. Since the locking component is located at the front end of the cylindrical rod 132, it will drive the two ends of the cable to move back and forth synchronously. More specifically, the locking component includes a lock head 14, which is fixedly welded to the front end of the cylindrical rod 132. The upper and lower sides of the lock head 14 are provided with through cable holes 141 for passing through the cable. The front side of the lock head 14 is provided with a second threaded hole 142, which is connected to the cable hole 141. The second threaded hole 142 is threaded with a locking bolt 143. After the cable is passed through the cable hole 141, the two ends of the cable can be locked and fixed by tightening the locking bolt 143.

[0025] Please combine Figure 1 and Figure 5 As shown, it should be added that a power supply box 11 is fixedly installed on the top of the base 1 near the second servo motor 12 to provide power for convenient use at any time. In order to facilitate the control of related equipment and display of test information, a control panel 10 is fixedly installed on the vertical plate 2. The first servo motor 8, the power supply box 11, the second servo motor 12 and the S-type tension and compression sensor 92 are all electrically connected to the control panel 10. It can be understood that in order to avoid the wires of the S-type tension and compression sensor 92 from getting tangled with the cable being tested, a through-hole reserved slot 22 is opened on both sides of the vertical plate 2 at the position corresponding to the S-type tension and compression sensor 92. The wires of the S-type tension and compression sensor 92 electrically connected to the control panel 10 pass through the reserved slot 22. If it is desired to detect the number of times the cable reciprocates, a photogate can also be installed on the vertical plate 2. The number of times the cable reciprocates can be obtained by calculating the frequency of the crossbar 13 passing through the photogate. This will not be elaborated further here.

[0026] The implementation principle of the wear resistance testing device for all-plastic low-voltage power cable production according to this application embodiment is as follows: When the device is needed to perform wear resistance testing on the cable, firstly, the cable is passed through the fixed friction wheel 3 and the moving friction wheel 4 in sequence. Then, both ends of the cable are passed through the corresponding cable holes 141, and the locking bolts 143 are tightened to lock and fix the two ends of the cable. Next, the first servo motor 8 is controlled by the control panel 10 to drive the threaded rod 7 to rotate, thereby driving the bracket 9 and the moving friction wheel 4 to move downward as a whole. During this process, the cable pulls the moving friction wheel 4 upward, so that the upper edge of the moving friction wheel 4 abuts against the bottom of the S-shaped tension and pressure sensor 92. At this time, the S-shaped tension and pressure sensor 92 detects the pressure, thereby obtaining the tension data of the cable. At the same time, the control panel 10 displays the pressure applied by the cable to the fixed friction wheel 3 and the moving friction wheel 4. When the data reaches the set range, the first servo motor 8 stops working, and the bracket 9 and the moving friction wheel 4 remain stationary. Following the initial height adjustment, the second servo motor 12 is controlled by the control panel 10 to reciprocate in both directions, thereby driving the crossbar 13 to reciprocate around its center point. This causes the two ends of the crossbar 13 to swing up and down. During this process, the crossbar 13 applies a pushing force to the cylindrical rod 132, causing the cylindrical rod 132 and the second slider 231 to move along the second slide groove 23 as a whole. This synchronously drives the two ends of the cable to reciprocate. When one end of the cable moves down, the other end moves up synchronously, thus achieving the purpose of synchronous friction between the fixed friction wheel 3 and the moving friction wheel 4. As the cable wears at the fixed friction wheel 3 and the moving friction wheel 4, its friction area becomes thinner. According to the physical force analysis, the pressure on the S-shaped tension and compression sensor 92 will decrease, and therefore the detected pressure data will become smaller. After data processing and calculation, the wear resistance test data of the cable can be quickly obtained. In addition, the cable can be disassembled to more intuitively compare and view multiple wear parts of the cable, improving the accuracy of the test.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wear-resistant testing device for the production of all-plastic low-voltage power cables, comprising a base (1) and a vertical plate (2), characterized in that: A set of fixed friction wheels (3) is provided on the front of the vertical plate (2). A positioning rod (5) is fixedly welded between each fixed friction wheel (3) and the vertical plate (2). A bracket (9) is provided below the fixed friction wheel (3). Two moving friction wheels (4) are placed on the inner side of the bracket (9). Guide blocks (41) are fixedly welded on both sides of the moving friction wheel (4). Guide grooves (91) are provided on the bracket (9) at the positions corresponding to the guide blocks (41). S-shaped tension and compression sensors (92) are fixedly installed on the upper inner wall of the bracket (9) at the position facing the moving friction wheel (4). The fixed friction wheel (3) and the moving friction wheel (4) are wrapped together. There is a single cable. The vertical plate (2) is equipped with an adjustment mechanism for adjusting the initial tension of the cable. A crossbar (13) is provided below the bracket (9). The middle part of the crossbar (13) is rotatably connected to the vertical plate (2). A second servo motor (12) is fixedly installed on the reverse side of the vertical plate (2). The output end of the second servo motor (12) is fixed to the middle part of the crossbar (13) through a coupling. A limiting groove (131) is provided at both ends of the crossbar (13). A cylindrical rod (132) is movably provided inside the limiting groove (131). A locking component for fixing the cable end is provided at the front end of the cylindrical rod (132).

2. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 1, characterized in that: The adjustment mechanism includes a threaded rod (7) and two supports (6). The two supports (6) are fixedly welded to the vertical plate (2). The threaded rod (7) is rotatably connected between the two supports (6). The bracket (9) has a first threaded hole (93) that matches the threaded rod (7). The bottom of the lower support (6) is provided with a first servo motor (8). The output end of the first servo motor (8) is connected to the bottom end of the threaded rod (7) through a coupling.

3. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 2, characterized in that: The vertical plate (2) has a first groove (21) at the position corresponding to the first servo motor (8). A first slider (211) is slidably connected to the inner side of the first groove (21). The first slider (211) extends to the outside of the first groove (21) and is fixed to the bracket (9).

4. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 3, characterized in that: The locking component includes a lock head (14), which is fixedly welded to the front end of the cylindrical rod (132). The lock head (14) has through cable holes (141) on its upper and lower sides, and a second threaded hole (142) is provided on the front side of the lock head (14). A locking bolt (143) is internally threaded into the second threaded hole (142).

5. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 4, characterized in that: The vertical plate (2) is provided with a second sliding groove (23) at the position corresponding to the cylindrical rod (132). The inner side of the second sliding groove (23) is slidably connected to a second slider (231). The rear end of the cylindrical rod (132) is fixed to the second slider (231).

6. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 5, characterized in that: A power supply box (11) is fixedly installed on the top of the base (1) and near the second servo motor (12).

7. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 6, characterized in that: A control panel (10) is fixedly installed on the vertical plate (2). The first servo motor (8), power supply box (11), second servo motor (12) and S-type tension and compression sensor (92) are all electrically connected to the control panel (10).

8. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 7, characterized in that: The vertical plate (2) has through slots (22) on both sides and at the positions corresponding to the S-type tension and compression sensor (92). The wires that are electrically connected to the S-type tension and compression sensor (92) and the control panel (10) pass through the slots (22).

9. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 8, characterized in that: The first groove (21) is located between two supports (6), and the two dynamic friction wheels (4) are symmetrical about the first groove (21).

10. The wear resistance testing device for the production of all-plastic low-voltage power cables according to claim 9, characterized in that: Both the fixed friction wheel (3) and the moving friction wheel (4) are "H" shaped, and the inner axial surfaces of the fixed friction wheel (3) and the moving friction wheel (4) are rough surfaces with the same coefficient of friction.

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