A thermal aging testing device for power cables

Abstract

This invention discloses a power cable thermal aging testing device, comprising a main body with two rotatably mounted sealing doors, each with an observation window. In use, the cable to be tested is placed on a feeding roller, with one end passing through two rectangular holes and the other end wound around a receiving roller. At the start of testing, two electric lifting rods are controlled via a control panel to vertically raise two movable clamping blocks, which then cooperate with two fixed clamping blocks to position and clamp the cable. This allows for downward and upward pressure on the cable between the two positioning and clamping components. When the downward or upward pressure on the cable reaches a threshold, the drive motor immediately reverses direction, repeatedly lifting and lowering the cable to repeatedly tighten and loosen it. A heating component heats the cable and simulates weathering, thus effectively performing closed-loop thermal aging testing on the cable, and the test results are unaffected by external factors.

Description

Technical Field

[0001] This invention relates to the field of cable aging testing equipment technology, and in particular to a power cable thermal aging testing device. Background Technology

[0002] Power cables typically have a rubber sheath on the outside of the cable. The rubber sheath not only secures multiple cables but also protects them. However, due to the limited heat resistance of the rubber sheath, cables used at high temperatures are prone to damage, leading to exposed wires and electric shock. Therefore, the heat aging resistance of the cable sheath is one of the key factors determining the cable's service life. As a result, the determination of the cable's heat aging performance is crucial, thus requiring a power cable heat aging testing device. Summary of the Invention

[0003] The purpose of this invention is to provide a power cable thermal aging detection device to solve the cable aging detection problem mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a power cable thermal aging testing device, comprising a device body, two sealing doors rotatably mounted on the device body, observation windows arranged on the sealing doors, a control panel mounted on the device body, several support columns mounted on the bottom of the device body, a testing cavity opened inside the device body, a sliding support plate slidably mounted inside the testing cavity, a feeding assembly arranged on the sliding support plate, and a heating assembly arranged on the sliding support plate;

[0005] The feeding assembly includes a feeding rack and a receiving rack symmetrically arranged on a sliding support plate. A feeding roller is rotatably mounted on the feeding rack, and a receiving roller is rotatably mounted on the receiving rack. A receiving motor is mounted on the receiving rack, and the output shaft of the receiving motor is connected to the receiving roller.

[0006] The sliding support plate is provided with a lifting assembly. The lifting assembly includes a fixed block arranged between the feeding rack and the receiving rack. A lifting slide groove is opened in the fixed block. A drive motor is installed on the bottom inner wall of the lifting slide groove. A threaded rod is installed on the output shaft of the drive motor. A transmission slider is threadedly connected to the threaded rod. A detection assembly is provided on the transmission slider.

[0007] The detection assembly includes a sliding plate mounted on a transmission slider. A pressure sensor is mounted on the bottom of the sliding plate, and a mounting plate is mounted on the bottom of the pressure sensor. A reset sliding groove is formed in the mounting plate, and a guide rod is mounted in the reset sliding groove. Two symmetrical sliding blocks are slidably mounted on the guide rod. Each of the two sliding blocks has a clamping block at its bottom, and a pull ring is mounted on each clamping block. Two compression springs are slidably sleeved on the guide rod. One end of each compression spring is mounted on the inner wall of the reset sliding groove, and the other end of each compression spring is mounted on one of the two sliding blocks respectively.

[0008] The sliding support plate is equipped with a positioning and clamping assembly, which includes two mounting blocks symmetrically mounted on the sliding support plate. Each mounting block has a rectangular hole. A fixed clamping block is installed on the top inner wall of the rectangular hole, and an electric lifting rod is installed on the bottom inner wall of the rectangular hole. A movable clamping block is installed on the output end of the electric lifting rod.

[0009] The inner wall of the lifting slide is provided with toothed grooves. A reciprocating screwing assembly is installed at the bottom of the sliding plate. The reciprocating screwing assembly includes a transmission protection box installed at the bottom of the sliding plate. Several connecting rods are installed on the top of the transmission protection box. The tops of the connecting rods are all installed at the bottom of the sliding plate. Two symmetrical connecting plates are installed at the bottom of the transmission slider. A first gear that meshes with the toothed groove is rotatably installed between the two connecting plates. A first fixed support plate is installed inside the transmission protection box. A first connecting shaft is rotatably installed on the first fixed support plate. A second gear that meshes with the first gear is installed at one end of the first connecting shaft. A first helical gear is installed at the other end of the first connecting shaft. A second fixed support plate is installed inside the transmission protection box. A second connecting shaft is rotatably installed on the second fixed support plate. A second helical gear that meshes with the first helical gear is installed at one end of the second connecting shaft. A third gear is installed at the other end of the second connecting shaft. A fourth gear that meshes with the third gear is rotatably installed inside the transmission protection box. A fifth gear that meshes with the fourth gear is rotatably installed inside the transmission protection box.

[0010] The fifth gear has two symmetrical arc-shaped limiting grooves, and several limiting rods are slidably installed in each of the two arc-shaped limiting grooves. The limiting rods are respectively installed on the inner walls of both sides of the transmission protection box. The fifth gear has a slot adapted to the cable, and a reset groove is formed on the inner wall of each slot. Anti-slip blocks are slidably installed in each of the two reset grooves, and a reset spring is installed in each of the two reset grooves. One end of the reset spring is installed on the inner wall of the reset groove, and the other end of the reset spring is installed on the anti-slip block.

[0011] The receiving motor, drive motor, pressure sensor, electric lifting rod, and heating assembly are all electrically connected to the control panel.

[0012] Preferably, the bottom inner wall of the detection cavity has two symmetrical sliding grooves, and the bottom of the sliding support plate is provided with a sliding assembly. The sliding assembly includes two C-shaped strips symmetrically installed at the bottom of the sliding support plate. Several rollers are rotatably installed in the C-shaped strips, and the C-shaped strips are slidably installed in the sliding grooves.

[0013] Preferably, a limiting groove is formed on the inner wall of both sides of the two sliding grooves, and a limiting slide bar is slidably installed in the limiting groove, and the limiting slide bar is installed on the C-shaped bar.

[0014] Preferably, the heating assembly includes a hot air blower body mounted on a sliding support plate, a fan arranged inside the hot air blower body, and a protective net arranged at the top opening of the hot air blower body.

[0015] Preferably, a plurality of electric heating wires are evenly distributed along the circumference on the inner wall of the hot air blower body, and a fixing plate is installed at both ends of the electric heating wires, and the fixing plate is installed on the inner wall of the hot air blower body.

[0016] Preferably, the transmission slider has a threaded hole that is compatible with the threaded rod.

[0017] Preferably, the bottom of both clamping blocks is provided with an inclined surface, and the side of the two clamping blocks that are close to each other is provided with an arc-shaped positioning groove.

[0018] Preferably, the sliding block has a sliding hole that is adapted to the guide rod.

[0019] Preferably, vertical limiting grooves are provided on the inner walls of both sides of the rectangular hole, and vertical limiting blocks are slidably installed in the vertical limiting grooves. The two vertical limiting blocks are respectively installed on both sides of the movable clamping block.

[0020] Preferably, the movable clamping block and the fixed clamping block each have an arc-shaped clamping groove on the side that is close to each other, and the surface of the arc-shaped clamping groove is evenly arranged with anti-slip rubber strips.

[0021] The beneficial effects of this invention are:

[0022] In this invention, through the coordinated operation of the feeding assembly, lifting assembly, detection assembly, and positioning clamping assembly, the cable to be tested is placed on the feeding roller during use. One end of the cable is passed through two rectangular holes, and the other end is wound around the take-up roller. At the start of detection, the control panel operates two electric lifting rods to vertically raise two movable clamping blocks, which then cooperate with two fixed clamping blocks to position and clamp the cable to be tested. The cable between the two positioning clamping assemblies is positioned directly below the detection assembly. At this point, the drive motor is activated via the control panel. Through the interaction of the threaded rod and the transmission slider, the detection assembly descends vertically, and the compression spring causes the clamping blocks to press against the cable. The cable is clamped and fixed. After the two clamping blocks are connected to the cable, the drive motor is started through the control panel to make the detection component move vertically upward or downward. The pressure sensor can obtain the pressure value of pressing down and lifting up, and a threshold can be set. Since the cable is fixed by the two positioning clamping components, the cable between the two positioning clamping components can be pressed down and lifted up. When the pressing down or lifting up process of the cable reaches the threshold, the drive motor immediately rotates in the opposite direction to repeatedly lift and press up the cable to repeatedly tighten and loosen it. The heating component can heat the cable and simulate weathering, so as to effectively perform closed thermal aging detection on the cable. The measurement is convenient and automated, and the measurement results are not affected by external factors.

[0023] In this invention, the reciprocating twisting assembly allows the cable to be engaged in the slot of the fifth gear, and the cable is clamped and fixed by two anti-slip blocks. This allows the first gear to slide back and forth along the tooth groove while the sliding plate moves vertically up and down. The interaction between the tooth groove and the first gear causes the first gear to rotate reciprocally. This first gear then drives the second gear to rotate, which in turn drives the first helical gear to rotate via the first connecting shaft. The first helical gear then drives the second helical gear to rotate, and the interaction between the second helical gear and the second connecting shaft drives the third gear to rotate. The third gear then drives the fourth gear to rotate, and finally, the fourth gear drives the fifth gear to rotate reciprocally. Because the cable is fixed by the two positioning clamping assemblies, the cable testing section can be reciprocated, causing the cable to repeatedly tighten and loosen, thus effectively performing aging detection on the cable.

[0024] In this invention, the feeding assembly allows for the inspection of an entire cable without the need for frequent material replacement, thus saving workers' time. Workers only need to replace the cable on the feeding roller and the receiving roller at the start and end of the inspection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a power cable thermal aging testing device proposed in this invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of a power cable thermal aging detection device proposed in this invention;

[0027] Figure 3 This is a cross-sectional structural diagram of the positioning clamping assembly and heating assembly of a power cable thermal aging detection device proposed in this invention.

[0028] Figure 4 This is a cross-sectional structural diagram of the lifting assembly and the detection assembly of a power cable thermal aging detection device proposed in this invention.

[0029] Figure 5 This invention provides a power cable thermal aging testing device. Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0030] Figure 6 This invention provides a power cable thermal aging testing device. Figure 4 Enlarged schematic diagram of the structure at point B;

[0031] Figure 7 This is a side view cross-sectional structural diagram of the positioning and clamping assembly of a power cable thermal aging detection device proposed in this invention.

[0032] Figure 8 This is a side cross-sectional view of the sliding component of a power cable thermal aging detection device proposed in this invention.

[0033] Figure 9 This is a top view cross-sectional structural diagram of the sliding component of a power cable thermal aging detection device proposed in this invention.

[0034] Figure 10 This invention provides a power cable thermal aging testing device. Figure 7 Enlarged schematic diagram of the structure at point C;

[0035] Figure 11 This is a bottom view cross-sectional structural diagram of the reciprocating twisting component of a power cable thermal aging testing device proposed in this invention.

[0036] Figure 12 This invention provides a power cable thermal aging testing device. Figure 11 Enlarged schematic diagram of the structure at point D;

[0037] Figure 13 This is a bottom view cross-sectional structural diagram of the transmission protection box of a power cable thermal aging detection device proposed in this invention.

[0038] Figure 14This is a top view cross-sectional structural diagram of the transmission protection box of a power cable thermal aging detection device proposed in this invention.

[0039] In the diagram: 1. Main body of the device; 11. Sealed door; 12. Observation window; 13. Control panel; 14. Support column; 15. Sliding support plate; 16. Detection chamber; 2. Feeding assembly; 21. Feeding rack; 22. Feeding roller; 23. Receiving rack; 24. Receiving motor; 25. Receiving roller; 3. Lifting assembly; 31. Fixing block; 32. Drive motor; 33. Threaded rod; 34. Transmission slider; 35. Lifting chute; 36. Threaded hole; 37. Toothed groove; 4. Detection component; 41. Sliding plate; 42. Pressure sensor; 43. Mounting plate; 44. Reset sliding groove; 45. Guide rod; 46. Compression spring; 47. Sliding block; 48. Sliding hole; 49. Clamping block; 410. Inclined surface; 411. Arc-shaped positioning groove; 412. Pull ring; 5. Positioning and clamping component; 51. Electric lifting rod; 52. Movable clamping block; 53. Vertical limit groove; 54. Vertical limit block; 55. 56. Fixed clamping block; 57. Anti-slip rubber strip; 58. Mounting block; 59. Rectangular hole; 60. Heating assembly; 61. Hot air blower body; 62. Fan; 63. Protective net; 64. Electric heating wire; 65. Fixing plate; 76. Sliding assembly; 71. C-shaped strip; 72. Sliding groove; 73. Roller; 74. Limiting slide bar; 75. Limiting slide groove; 87. Reciprocating screwing assembly; 88. Connecting rod; 89. First gear; 80. Connecting plate; 81. ... 85. First connecting shaft; 86. First fixed support plate; 87. First helical gear; 88. Second helical gear; 89. Second connecting shaft; 810. Third gear; 811. Arc-shaped limiting groove; 812. Transmission protection box; 813. Second fixed support plate; 814. Fourth gear; 815. Fifth gear; 816. Limiting rod; 817. Slot; 818. Anti-slip clamp; 819. Return spring; 820. Return groove. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0041] Reference Figure 1-14 A power cable thermal aging testing device includes a device body 1, two sealing doors 11 rotatably mounted on the device body 1, observation windows 12 arranged on the sealing doors 11, a control panel 13 mounted on the device body 1, several support columns 14 mounted on the bottom of the device body 1, a testing chamber 16 opened inside the device body 1, a sliding support plate 15 slidably mounted inside the testing chamber 16, a feeding assembly 2 arranged on the sliding support plate 15, and a heating assembly 6 arranged on the sliding support plate 15.

[0042] The feeding assembly 2 includes a feeding rack 21 and a receiving rack 23 symmetrically arranged on the sliding support plate 15. A feeding roller 22 is rotatably mounted on the feeding rack 21, and a receiving roller 25 is rotatably mounted on the receiving rack 23. A receiving motor 24 is mounted on the receiving rack 23, and the output shaft of the receiving motor 24 is connected to the receiving roller 25.

[0043] The sliding support plate 15 is provided with a lifting assembly 3. The lifting assembly 3 includes a fixed block 31 arranged between the feeding rack 21 and the receiving rack 23. A lifting slide 35 is provided in the fixed block 31. A drive motor 32 is installed on the bottom inner wall of the lifting slide 35. A threaded rod 33 is installed on the output shaft of the drive motor 32. A transmission slider 34 is threadedly connected to the threaded rod 33. A detection assembly 4 is provided on the transmission slider 34.

[0044] The detection assembly 4 includes a sliding plate 41 mounted on a transmission slider 34. A pressure sensor 42 is mounted on the bottom of the sliding plate 41, and a mounting plate 43 is mounted on the bottom of the pressure sensor 42. A reset sliding groove 44 is formed in the mounting plate 43, and a guide rod 45 is mounted in the reset sliding groove 44. Two symmetrical sliding blocks 47 are slidably mounted on the guide rod 45. A clamping block 49 is mounted on the bottom of each sliding block 47, and a pull ring 412 is mounted on the clamping block 49. Two compression springs 46 are slidably sleeved on the guide rod 45. One end of each compression spring 46 is mounted on the inner wall of the reset sliding groove 44, and the other end of each compression spring 46 is mounted on the two sliding blocks 47 respectively.

[0045] The sliding support plate 15 is provided with a positioning and clamping assembly 5. The positioning and clamping assembly 5 includes two mounting blocks 57 symmetrically mounted on the sliding support plate 15. Each mounting block 57 has a rectangular hole 58. A fixing clamping block 55 is installed on the top inner wall of the rectangular hole 58, and an electric lifting rod 51 is installed on the bottom inner wall of the rectangular hole 58. A movable clamping block 52 is installed on the output end of the electric lifting rod 51.

[0046] The inner wall of the lifting slide 35 is provided with a toothed groove 37. A reciprocating turning assembly 8 is installed at the bottom of the sliding plate 41. The reciprocating turning assembly 8 includes a transmission protection box 812 installed at the bottom of the sliding plate 41. Several connecting rods 81 are installed on the top of the transmission protection box 812. The tops of the connecting rods 81 are all installed at the bottom of the sliding plate 41. Two mutually symmetrical connecting plates 83 are installed at the bottom of the transmission slider 34. A first gear 82 that meshes with the toothed groove 37 is rotatably installed between the two connecting plates 83. A first fixed support plate 86 is installed inside the transmission protection box 812. A first connecting shaft 85 is rotatably installed on the first fixed support plate 86. One end of the first connecting shaft 85 is equipped with a second gear 84 that meshes with the first gear 82, and the other end of the first connecting shaft 85 is equipped with a first helical gear 87. A second fixed support plate 813 is installed inside the transmission protection box 812. A second connecting shaft 89 is rotatably mounted on the second fixed support plate 813. A second helical gear 88 that meshes with the first helical gear 87 is installed at one end of the second connecting shaft 89. A third gear 810 is installed at the other end of the second connecting shaft 89. A fourth gear 814 that meshes with the third gear 810 is rotatably mounted inside the transmission protection box 812. A fifth gear 815 that meshes with the fourth gear 814 is rotatably mounted inside the transmission protection box 812.

[0047] The fifth gear 815 has two symmetrical arc-shaped limiting grooves 811. Several limiting rods 816 are slidably installed within each of the two arc-shaped limiting grooves 811. The limiting rods 816 are respectively installed on the inner walls of both sides of the transmission protection box 812. The fifth gear 815 has a slot 817 adapted to the cable. Reset grooves 820 are formed on the inner walls of both sides of the slot 817. Anti-slip blocks 818 are slidably installed within each of the two reset grooves 820. A reset spring 819 is installed within each of the two reset grooves 820. One end of the reset spring 819 is installed on the inner wall of the reset groove 820, and the other end is installed on the anti-slip block 818.

[0048] The receiving motor 24, drive motor 32, pressure sensor 42, electric lifting rod 51, and heating component 6 are all electrically connected to the control panel 13.

[0049] Through the coordinated operation of the feeding assembly 2, lifting assembly 3, detection assembly 4, and positioning clamping assembly 5, the cable to be tested can be placed on the feeding roller 22 during use. One end of the cable is passed through the two rectangular holes 58, and the other end is wound around the receiving roller 25. At the start of the test, the two electric lifting rods 51 are operated via the control panel 13 to drive the two movable clamping blocks 52 to rise vertically, thereby cooperating with the two fixed clamping blocks 55 to position and clamp the cable to be tested, and to position the cable between the two positioning clamping assemblies 5 directly below the detection assembly 4. At this time, the drive motor is turned on via the control panel 13. 32. Through the cooperation of the threaded rod 33 and the transmission slider 34, the detection component 4 descends vertically. The clamping spring 46 clamps and fixes the cable with the clamping block 49. After the two clamping blocks 49 are connected to the cable, the drive motor 32 is started through the control panel 13, making the detection component 4 move vertically upward or downward. The pressure sensor 42 can obtain the pressure value of pressing down and lifting up, and set the threshold. Since the cable is fixed by the two positioning clamping components 5, the cable between the two positioning clamping components 5 can be pressed down and lifted up. When the pressing down or lifting up process of the cable reaches the threshold, the drive motor 32 immediately reverses. The cable is repeatedly pulled up and down, causing it to taut and loosen repeatedly. Heating component 6 heats the cable and simulates weathering. A reciprocating twisting component 8 engages the cable in the slot 817 of the fifth gear 815, and two anti-slip blocks 818 clamp and secure the cable. Simultaneously, the sliding plate 441 moves vertically up and down, causing the first gear 82 to slide back and forth along the tooth groove 37. The interaction between the tooth groove 37 and the first gear 82 causes the first gear 82 to rotate, which in turn drives the second gear 84 to rotate, thus connecting the first connecting shaft. 85 drives the first helical gear 87 to rotate, which in turn drives the second helical gear 88 to rotate. The second helical gear 88, in turn, drives the third gear 810 to rotate through the interaction of the second helical gear 88 and the second connecting shaft 89. The third gear 810 then drives the fourth gear 814 to rotate, and finally the fourth gear 814 drives the fifth gear 815 to rotate reciprocally. Since the cable is fixed by the two positioning clamping components 5, the cable testing section can be reciprocated, causing the cable to be repeatedly tightened and loosened. This allows for effective closed-loop thermal aging testing of the cable, which is convenient and automated, and the test results are not affected by external factors.

[0050] Specifically, in this invention, two symmetrical sliding grooves 72 are provided on the bottom inner wall of the detection cavity 16, and a sliding assembly 7 is arranged at the bottom of the sliding support plate 15. The sliding assembly 7 includes two C-shaped strips 71 symmetrically installed at the bottom of the sliding support plate 15. Several rollers 73 are rotatably installed in the C-shaped strips 71, and the C-shaped strips 71 are slidably installed in the sliding grooves 72.

[0051] Through the cooperation of the sliding groove 72, C-shaped strip 71 and roller 73, the sliding support plate 15 can slide along the sliding groove 72 through the cooperation of the C-shaped strip 71 and the roller 73. Due to the setting of the roller 73, the sliding support plate 15 can slide more smoothly.

[0052] Specifically, in this invention, limiting grooves 75 are provided on the inner walls of both sides of the two sliding grooves 72, and limiting slide bars 74 are slidably installed in the limiting grooves 75. The limiting slide bars 74 are installed on the C-shaped strip 71.

[0053] By the cooperation of the limiting slide groove 75 and the limiting slide bar 74, the limiting slide bar 74 can slide along the limiting slide groove 75, thereby limiting the movement range of the C-shaped bar 71, and thus limiting the movement range of the sliding support plate 15.

[0054] Specifically, in this invention, the heating component 6 includes a hot air blower body 61 mounted on a sliding support plate 15, a fan 62 arranged inside the hot air blower body 61, and a protective net 63 arranged at the top opening of the hot air blower body 61.

[0055] The protective net 63 prevents the cable end from falling into the hot air blower body 61 in case of an accident, thereby improving the safety of the device and protecting the personal safety of the testing personnel.

[0056] Specifically, in this invention, a plurality of electric heating wires 64 are evenly distributed along the circumference on the inner wall of the hot air blower body 61, and a fixing plate 65 is installed at both ends of the electric heating wires 64. The fixing plate 65 is installed on the inner wall of the hot air blower body 61.

[0057] The electric heating wire 64 can heat the air temperature inside the hot air blower body 61 when the fan 62 blows air, so that the fan 62 blows out hot air, thereby heating the cable and simulating weathering.

[0058] Specifically, in this invention, the transmission slider 34 is provided with a threaded hole 36, which is adapted to the threaded rod 33.

[0059] By engaging the threaded hole 36 with the threaded rod 33, when the threaded rod 33 rotates, the transmission slider 34 can move vertically up and down along the threaded rod 33 through the engagement of the threaded hole 36 with the threaded rod 33.

[0060] Specifically, in this invention, the bottom of each of the two clamping blocks 49 is provided with an inclined surface 410, and the side of each of the two clamping blocks 49 that is close to each other is provided with an arc-shaped positioning groove 411.

[0061] With the inclined surface 410 provided, when the two clamping blocks 49 are perpendicularly downward and in contact with the cable, the inclined surface 410 can cause the two clamping blocks 49 to move away from each other, thereby causing the two sliding blocks 47 to move away from each other along the guide rod 45 and compress the two compression springs 46. When the cable passes through the inclined surface 410 and reaches the arc-shaped positioning groove 411, the force of the compression spring 46 can push the two sliding blocks 47 to move closer to each other, thereby causing the two clamping blocks 49 to move closer to each other. Thus, the cable can be clamped and limited by the arc-shaped positioning groove 411 on the two clamping blocks 49.

[0062] Specifically, in this invention, the sliding block 47 is provided with a sliding hole 48, which is adapted to the guide rod 45.

[0063] The sliding block 47 can slide along the guide rod 45 through the sliding hole 48 by interacting with the guide rod 45.

[0064] Specifically, in this invention, vertical limiting grooves 53 are provided on both inner walls of the rectangular hole 58, and vertical limiting blocks 54 are slidably installed in the vertical limiting grooves 53. The two vertical limiting blocks 54 are respectively installed on both sides of the movable clamping block 52.

[0065] By cooperating with the vertical limiting groove 53 and the vertical limiting block 54, the vertical limiting block 54 can slide along the vertical limiting groove 53, thereby guiding and limiting the movement direction of the movable clamping block 52, and further restricting the movement range of the movable clamping block 52.

[0066] Specifically, in this invention, both the movable clamping block 52 and the fixed clamping block 55 have arc-shaped clamping grooves on their sides that are close to each other, and anti-slip rubber strips 56 are evenly arranged on the surface of the arc-shaped clamping grooves.

[0067] With the anti-slip rubber strip 56 provided, when the fixed clamping block 55 and the movable clamping block 52 clamp and position the cable, the anti-slip rubber strip 56 can increase the friction between the fixed clamping block 55 and the movable clamping block 52 and the cable, thereby more effectively positioning and clamping the cable and preventing slippage.

[0068] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power cable thermal aging testing device, comprising a device body (1), characterized in that: Two sealing doors (11) are rotatably mounted on the main body (1) of the device. An observation window (12) is arranged on the sealing door (11). A control panel (13) is installed on the main body (1). Several support columns (14) are installed at the bottom of the main body (1). A detection chamber (16) is opened inside the main body (1). A sliding support plate (15) is slidably installed inside the detection chamber (16). A feeding assembly (2) is arranged on the sliding support plate (15). A heating assembly (6) is arranged on the sliding support plate (15). The feeding assembly (2) includes a feeding rack (21) and a receiving rack (23) symmetrically arranged on the sliding support plate (15). A feeding roller (22) is rotatably mounted on the feeding rack (21), and a receiving roller (25) is rotatably mounted on the receiving rack (23). A receiving motor (24) is mounted on the receiving rack (23), and the output shaft of the receiving motor (24) is connected to the receiving roller (25). The sliding support plate (15) is provided with a lifting assembly (3). The lifting assembly (3) includes a fixed block (31) arranged between the feeding rack (21) and the receiving rack (23). A lifting slide groove (35) is opened in the fixed block (31). A drive motor (32) is installed on the bottom inner wall of the lifting slide groove (35). A threaded rod (33) is installed on the output shaft of the drive motor (32). A transmission slider (34) is threadedly connected to the threaded rod (33). A detection assembly (4) is provided on the transmission slider (34). The detection component (4) includes a sliding plate (41) mounted on a transmission slider (34). A pressure sensor (42) is mounted on the bottom of the sliding plate (41). A mounting plate (43) is mounted on the bottom of the pressure sensor (42). A reset sliding groove (44) is provided in the mounting plate (43). A guide rod (45) is installed in the reset sliding groove (44). Two mutually symmetrical sliding blocks (47) are slidably mounted on the guide rod (45). A clamping block (49) is installed on the bottom of each of the two sliding blocks (47). A pull ring (412) is installed on the clamping block (49). Two compression springs (46) are slidably sleeved on the guide rod (45). One end of each of the two compression springs (46) is mounted on the inner wall of the reset sliding groove (44). The other ends of the two compression springs (46) are respectively mounted on the two sliding blocks (47). The sliding support plate (15) is provided with a positioning clamping assembly (5). The positioning clamping assembly (5) includes two mounting blocks (57) symmetrically installed on the sliding support plate (15). Each of the two mounting blocks (57) has a rectangular hole (58). A fixed clamping block (55) is installed on the top inner wall of the rectangular hole (58). An electric lifting rod (51) is installed on the bottom inner wall of the rectangular hole (58). A movable clamping block (52) is installed on the output end of the electric lifting rod (51). The inner wall of the lifting slide (35) is provided with a toothed groove (37). A reciprocating screwing assembly (8) is installed at the bottom of the sliding plate (41). The reciprocating screwing assembly (8) includes a transmission protection box (812) installed at the bottom of the sliding plate (41). Several connecting rods (81) are installed on the top of the transmission protection box (812). The tops of the connecting rods (81) are all installed at the bottom of the sliding plate (41). Two mutually symmetrical connecting plates (83) are installed at the bottom of the transmission slider (34). A first gear (82) that meshes with the toothed groove (37) is rotatably installed between the two connecting plates (83). A first fixed support plate (86) is installed inside the transmission protection box (812). A first connecting shaft (85) is rotatably installed on the first fixed support plate (86). One end of the first connecting shaft (85) is equipped with a second gear (84) that meshes with the first gear (82), and the other end of the first connecting shaft (85) is equipped with a first helical gear (87). A second fixed support plate (813) is installed inside the transmission protection box (812). A second connecting shaft (89) is rotatably installed on the second fixed support plate (813). One end of the second connecting shaft (89) is equipped with a second helical gear (88) that meshes with the first helical gear (87), and the other end of the second connecting shaft (89) is equipped with a third gear (810). A fourth gear (814) that meshes with the third gear (810) is rotatably installed inside the transmission protection box (812), and a fifth gear (815) that meshes with the fourth gear (814) is rotatably installed inside the transmission protection box (812). The fifth gear (815) has two symmetrical arc-shaped limiting grooves (811). Several limiting rods (816) are slidably installed in each of the two arc-shaped limiting grooves (811). The limiting rods (816) are respectively installed on the inner walls of both sides of the transmission protection box (812). The fifth gear (815) has a slot (817) adapted to the cable. The inner walls of both sides of the slot (817) have reset grooves (820). Anti-slip clamps (818) are slidably installed in each of the two reset grooves (820). Reset springs (819) are installed in each of the two reset grooves (820). One end of the reset spring (819) is installed on the inner wall of the reset groove (820), and the other end of the reset spring (819) is installed on the anti-slip clamp (818). The receiving motor (24), drive motor (32), pressure sensor (42), electric lifting rod (51) and heating component (6) are all electrically connected to the control panel (13).

2. The power cable thermal aging testing device according to claim 1, characterized in that: The detection cavity (16) has two symmetrical sliding grooves (72) on its bottom inner wall. The sliding support plate (15) has a sliding assembly (7) at its bottom. The sliding assembly (7) includes two C-shaped strips (71) symmetrically installed at the bottom of the sliding support plate (15). Several rollers (73) are rotatably installed in the C-shaped strips (71). The C-shaped strips (71) are slidably installed in the sliding grooves (72).

3. The power cable thermal aging testing device according to claim 2, characterized in that: Limiting grooves (75) are provided on the inner walls of both sides of the two sliding grooves (72). Limiting slide bars (74) are slidably installed in the limiting grooves (75) and the limiting slide bars (74) are installed on the C-shaped strip (71).

4. The power cable thermal aging testing device according to claim 1, characterized in that: The heating assembly (6) includes a hot air blower body (61) mounted on a sliding support plate (15), a fan (62) is arranged inside the hot air blower body (61), and a protective net (63) is arranged at the top opening of the hot air blower body (61).

5. The power cable thermal aging testing device according to claim 4, characterized in that: The inner wall of the hot air blower body (61) is evenly distributed with several electric heating wires (64) along the circumference. Both ends of the electric heating wires (64) are equipped with fixing plates (65), which are installed on the inner wall of the hot air blower body (61).

6. The power cable thermal aging testing device according to claim 1, characterized in that: The transmission slider (34) has a threaded hole (36) that is compatible with the threaded rod (33).

7. The power cable thermal aging testing device according to claim 1, characterized in that: Both clamping blocks (49) have inclined surfaces (410) at their bottoms, and arc-shaped positioning grooves (411) are provided on the sides of the two clamping blocks (49) that are close to each other.

8. The power cable thermal aging testing device according to claim 1, characterized in that: The sliding block (47) has a sliding hole (48) that is adapted to the guide rod (45).

9. The power cable thermal aging testing device according to claim 1, characterized in that: Vertical limiting grooves (53) are provided on both inner walls of the rectangular hole (58). Vertical limiting blocks (54) are slidably installed in the vertical limiting grooves (53). The two vertical limiting blocks (54) are respectively installed on both sides of the movable clamping block (52).

10. The power cable thermal aging testing device according to claim 1, characterized in that: Both the movable clamping block (52) and the fixed clamping block (55) have arc-shaped clamping grooves on their sides that are close to each other, and anti-slip rubber strips (56) are evenly arranged on the surface of the arc-shaped clamping grooves.

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