Power cable thermal aging detection device and method

Abstract

The invention discloses a power cable thermal aging detection device and method, and relates to the technical field of cable detection.The power cable thermal aging detection device comprises a detection box, placement holes are formed in the two sides of the detection box, a fan, a heating wire and an irradiation lamp are further arranged in the detection box, hanging assemblies are arranged at the two ends of the top of the detection box, and the hanging assemblies are connected with a clamping mechanism; a holding hole is formed in the detection box, a lifting groove is horizontally formed in the detection box, a cable penetrates through the holding hole to enter the lifting groove in the detection box, the clamping mechanism is fixedly installed with the two ends of the cable, the clamping mechanism is connected with a detection mechanism, a suspension pulling mechanism is arranged on the lower side of the detection box, and the suspension pulling mechanism pulls the middle of the cable to bend downwards; the stress state of the long-distance installed cable is simulated through the overhanging pulling mechanism, and then thermal aging simulation detection is performed, so that the accuracy of detection data is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and specifically to a device and method for detecting the thermal aging of power cables. Background Technique

[0002] The detection of cable thermal aging is an important means to evaluate the performance change of cables under long-term heating. When exposed to harsh conditions such as high temperature and ultraviolet radiation for a long time, the insulating materials of cables will age, resulting in a decline in electrical performance and even potentially triggering safety accidents.

[0003] The existing simulation detection of cable thermal aging takes a long time and cannot perform corresponding simulation detection in combination with the cable installation environment. Especially for long-distance installed cables, there are significant differences between the simulated working conditions and the actual installation environment, making it difficult to obtain relatively accurate thermal aging detection results. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for detecting the thermal aging of power cables to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A device for detecting the thermal aging of power cables includes a detection box. There are placement holes on both sides of the detection box. A fan, a heating wire, and an irradiation lamp are also arranged inside the detection box. Suspension components are arranged at both ends of the top of the detection box. The suspension components are connected with a clamping mechanism. A lifting groove is horizontally installed inside the detection box. The cable passes through the placement hole and enters the lifting groove inside the detection box. The clamping mechanism is fixedly installed at both ends of the cable respectively. The clamping mechanism is connected with a detection mechanism. A suspension pulling mechanism is arranged on the lower side of the detection box. The suspension pulling mechanism pulls the middle part of the cable to bend downward.

[0007] The detection mechanism includes a telescopically installed column that is suspended. A docking column is fitted at the end of the telescopic column. Semi-circular frames are symmetrically rotatably installed at the end of the docking column. A contact wheel is rotatably installed inside the semi-circular frame. The semi-circular frame in combination with the contact wheel is in contact installation with the outer wall of the cable. A connecting cable is arranged at the end of the docking column. The connecting cable passes through the end of the telescopic column and is connected with a winding drum. A camera is arranged inside the semi-circular frame.

[0008] As a further scheme of the present invention: A guide wheel is fixedly arranged on the side of the telescopic column. A docking groove is arranged at the end of the telescopic column. The connecting cable passes through the docking groove at the end of the telescopic column after being mutually matched with the guide wheel. A matching protrusion is arranged on the outer side of the docking column. The docking column is mutually matched with the docking groove through the matching protrusion.

[0009] As a further solution of the present invention: an installation block is provided at the end of the docking column, a first connecting plate is provided on the semi-circular frame, the semi-circular frame is rotatably installed between the first connecting plate and the installation block, a second rotating motor is provided at the rotating connection part between the first connecting plate and the installation block, a second connecting plate is provided inside the semi-circular frame, a third telescopic motor is provided on the second connecting plate, the contact wheel is rotatably installed between the output shaft of the third telescopic motor, and the contact wheel is connected with a rotating motor.

[0010] As a further solution of the present invention: the suspension pulling mechanism includes a lower slide rail provided in the detection box, two groups of electric sliders are slidably installed on the lower slide rail, a rotating frame is rotatably installed on the electric slider, the ends of the two rotating frames on both sides are rotatably connected, an isosceles triangle structure is formed between the rotating frames, a fourth telescopic motor is fixedly provided on the rotation axis of the two rotating frames, the fourth telescopic motor is connected with a telescopic rod, a suspension block is installed on the telescopic rod, the suspension block is connected with a counterweight block, an arc-shaped pressing block is suspended and installed at the end of the telescopic rod, and the bottom of the arc-shaped pressing block cooperates with the surface of the cable.

[0011] As a further solution of the present invention: a resistance chute is vertically provided in the detection box, an extension column is provided on the rotation axis of the two rotating frames, a second matching slider is provided at the end of the extension column, and the second matching slider cooperates with the resistance chute.

[0012] As a further solution of the present invention: the clamping mechanism includes a suspended lifting column, the top of the lifting column is connected with a suspension assembly, suspension plates are symmetrically provided at the bottom of the lifting column, fixing plates two are symmetrically provided on the sides of the suspension plates, a first telescopic motor is provided on the fixing plate two, the first telescopic motor is connected with a mounting plate, a fixed shovel is provided on the mounting plate, the fixed shovels are symmetrically arranged, a right-angle frame is rotatably installed on the suspension plate, a first rotating motor is provided between the right-angle frame and the suspension plate, a second telescopic motor is provided on the right-angle frame, the second telescopic motor is connected with a wrapping frame, a matching notch is provided on the wrapping frame, a clamping motor is obliquely arranged inside the wrapping frame, the clamping motor is connected with a clamping frame, puncture nails are evenly arranged on the side of the clamping frame facing the cable, and the telescopic column is fixedly connected with the right-angle frame.

[0013] As a further solution of the present invention: The suspension assembly includes an upper slide rail provided at the top of the detection box. A first mating slider is slidably mounted on the upper slide rail. A first fixing plate is fixedly provided on the upper slide rail. A slide rod is provided between the first fixing plate and the side of the detection box. A mating column is provided on the first mating slider. The mating column is slidably mounted between the slide rod. A horizontal ejector rod is provided on the first mating slider. A support spring is sleeved on the slide rod between the mating column and the first fixing plate. The mating column is horizontally connected to a plugging rod. The plugging rod passes through the detection box and is connected to a plug. The plug and the placement hole cooperate with each other. The bottom of the mating column is connected to the clamping mechanism.

[0014] As a further solution of the present invention: A positioning block is provided at the position of the placement hole. A horizontal air cylinder is provided outside the detection box. The horizontal air cylinder is connected to the middle of the lifting groove. When the lifting groove and the positioning block cooperate with each other, the axis of the lifting groove coincides with the axis of the placement hole.

[0015] A detection method of a power cable thermal aging detection device as described above includes the following steps: S1. Place the cable to be detected into the lifting groove in the detection box from the position of the placement hole; S2. Control the clamping mechanism to descend into the lifting groove, clamp and fix both ends of the cable, then lift the cable and control the lifting groove to move to the inner wall of the detection box; S3. Lower the cable and combine the suspension pulling mechanism to perform suspension pulling on the middle of the cable, so that the cable is in a downwardly curved shape; S4. Start the fan, the irradiation lamp, and the heating wire to heat and irradiate the cable, and cooperate with the detection mechanism to detect the surface of the cable.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) Combine the clamping mechanism to clamp and fix both ends of the cable, and then control the lifting groove to move to the inner wall part of the detection box to avoid interference with subsequent detection. Perform suspension pulling on the middle of the cable through the suspension pulling mechanism to simulate the installation form of the middle part of a long-distance installed cable sagging due to its own gravity, which is close to the actual installation environment of the cable, and then perform thermal aging detection on the cable.

[0018] (2) Combine the connecting cable to connect the docking column and the semi-circular frame. When the semi-circular frame is released by the winding drum, the semi-circular frame moves along the surface of the cable in combination with the contact wheel, so as to realize regular photographing of the cable surface to check the thermal aging situation. During detection, control the semi-circular frame to close. When the contact wheel rotates in combination with the power component, it will drive the closed semi-circular frame to move along the cable surface, so as to realize rapid detection of the cable surface. After the detection is completed, the connecting cable is recovered by the winding drum, thereby driving the detection mechanism back to the initial position.

[0019] (3) Combine the telescopic motor 1 to drive the fixed shovel to move towards the cable. The fixed shovels on both sides complete the preliminary clamping and fixing of the cable surface. Subsequently, raise the cable by combining the lifting column, control the lifting groove to move to the inner wall part of the detection box, drive the right-angle frame to rotate by combining the rotating motor 1, and make the cable pass through the matching notch part and fall into the wrapping frame by combining the telescopic motor 2. Drive the clamping frame to move closer to the cable by using the clamping motor, and finally, the puncture nail penetrates into the cable to complete the clamping and fixing of the cable.

[0020] (4) The clamping mechanism and the detection mechanism are synchronously suspended and installed on the top of the detection box in combination with the suspension assembly. After the cable is suspended and fixed, when the middle part of the cable is bent and simulated by combining the hanging pulling mechanism, the two ends of the cable move towards the middle part. At this time, the matching column combines with the matching slider 1 to move towards the fixed plate 1 until the end of the ejector rod abuts against the surface of the fixed plate 1. At this time, the matching column combines with the inserting rod to drive the plug to block the placing groove, ensuring the constant temperature inside the detection box during subsequent thermal aging detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the suspension assembly in the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the clamping mechanism in the present invention.

[0025] Figure 5 It is a schematic diagram of the assembly structure of the wrapping frame and the cable in the present invention.

[0026] Figure 6 It is a schematic diagram of the connection structure between the clamping frame and the wrapping frame in the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the detection mechanism in the present invention.

[0028] Figure 8 It is a schematic diagram of the connection between the docking column and the telescopic column in the present invention.

[0029] Figure 9 It is a schematic diagram of the installation structure of the contact wheel in the present invention.

[0030] Figure 10 It is a schematic diagram of the structure of the hanging pulling mechanism in the present invention.

[0031] Figure 11 For Figure 10 The enlarged structure schematic diagram at position A in

[0032] In the figure: 1. Detection box; 100. Fan; 101. Heating wire; 102. Irradiation lamp; 10. Placement hole; 11. Lifting groove; 12. Positioning block; 2. Suspension assembly; 20. Upper slide rail; 21. Matching slider one; 22. Fixed plate one; 23. Jacking rod; 24. Slide bar; 25. Matching column; 26. Insertion rod; 27. Plug; 28. Support spring; 3. Clamping mechanism; 30. Lifting column; 31. Suspension plate; 32. Fixed plate two; 33. Mounting plate; 34. Fixed shovel; 35. Telescopic motor one; 36. Right-angle frame; 37. Rotary motor one; 38. Telescopic motor two; 39. Wrapping frame; 310. Clamping motor; 311. Clamping frame; 312. Piercing nail; 313. Matching notch; 4. Detection mechanism; 40. Connecting cable; 41. Guide wheel; 42. Telescopic column; 420. Docking groove; 43. Docking column; 430. Matching protrusion; 44. Mounting block; 45. Rotary motor two; 46. Semi-circular frame; 460. Connecting plate one; 461. Camera; 47. Contact wheel; 470. Connecting plate two; 471. Telescopic motor three; 472. Rotating motor; 5. Suspension pulling mechanism; 50. Lower slide rail; 51. Electric slider; 52. Rotating frame; 53. Resistance chute; 54. Matching slider two; 55. Extension column; 56. Telescopic motor four; 57. Telescopic rod; 58. Suspension block; 59. Counterweight; 510. Arc-shaped pressing block. Detailed implementation manners

[0033] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0034] As Figure 1 , Figure 2 shown, a thermal aging detection device for power cables includes a detection box 1. Placement holes 10 are provided on both sides of the detection box 1. A fan 100, a heating wire 101, and an irradiation lamp 102 are further provided inside the detection box 1. Suspension assemblies 2 are provided at both ends of the top of the detection box 1. The suspension assemblies 2 are connected with a clamping mechanism 3. A lifting groove 11 is horizontally installed inside the detection box 1. The cable passes through the placement hole 10 and enters the lifting groove 11 inside the detection box 1. The clamping mechanism 3 is fixedly installed at both ends of the cable respectively. The clamping mechanism 3 is connected with a detection mechanism 4. A suspension pulling mechanism 5 is provided on the lower side of the detection box 1. The suspension pulling mechanism 5 pulls the middle part of the cable to bend downward.

[0035] Specifically, before placing the cable, control the lifting groove 11 to reach the position of the placement hole 10, and then put the cable into the detection box 1 from the position of the placement hole 10. The other end of the cable passes through the placement hole 10 on the other side of the detection box 1, and control a part of the cable to be left outside both ends of the detection box 1 to facilitate the removal of the cable after the detection. Combine the clamping mechanism 3 to clamp and fix both ends of the cable, and then control the lifting groove 11 to move to the inner wall part of the detection box 1 to avoid interfering with subsequent detections. Use the hanging pulling mechanism 5 to hang and pull the middle part of the cable to simulate the installation form in which the middle part of the cable sags due to its own gravity during long-distance installation, approaching the actual installation environment of the cable, and then conduct a thermal aging test on the cable.

[0036] As Figure 7 shown, the detection mechanism 4 includes a telescopically mounted telescopic column 42. The end of the telescopic column 42 is fitted with a docking column 43. The end of the docking column 43 is rotationally symmetrically mounted with a semi-circular frame 46. A contact wheel 47 is rotatably mounted in the semi-circular frame 46. The semi-circular frame 46 is in contact with the outer wall of the cable in combination with the contact wheel 47. A connecting cable 40 is provided at the end of the docking column 43. The connecting cable 40 passes through the end of the telescopic column 42 and is connected to a winding drum. A camera 461 is provided inside the semi-circular frame 46.

[0037] Specifically, combine the connecting cable 40 to connect the docking column 43 and the semi-circular frame 46. When the semi-circular frame 46 is released by the winding drum, the semi-circular frame 46 moves along the surface of the cable in combination with the contact wheel 47, so as to realize the regular shooting and inspection of the cable surface for thermal aging. During the detection, control the semi-circular frame 46 to close. When the contact wheel 47 rotates in combination with the power component, it will drive the closed semi-circular frame 46 to move along the cable surface, so as to realize the rapid detection of the cable surface. After the detection is completed, the connecting cable 40 is recovered by the winding drum, thereby driving the detection mechanism 4 back to the initial position.

[0038] Furthermore, as Figure 7 、 Figure 8 shown, a guide wheel 41 is fixedly provided on the side of the telescopic column 42. A docking groove 420 is provided at the end of the telescopic column 42. The connecting cable 40 is passed through the docking groove 420 at the end of the telescopic column 42 after being matched with the guide wheel 41. A matching protrusion 430 is provided on the outside of the docking column 43. The docking column 43 is matched with the docking groove 420 through the matching protrusion 430.

[0039] Specifically, in order to facilitate the control of the angle of the semi-circular frame 46, the docking column 43 and the docking groove 420 are positioned through the matching protrusion 430, and at the same time, the release and recovery of the semi-circular frame 46 are quickly completed through the docking groove 420, which is convenient for the rapid detection of the thermal aging of the cable surface.

[0040] Furthermore, as Figure 8 、Figure 9 As shown, an installation block 44 is provided at the end of the docking column 43. A first connecting plate 460 is provided on the semi-circular frame 46. The semi-circular frame 46 is rotatably installed between the first connecting plate 460 and the installation block 44. A second rotating motor 45 is provided at the rotating connection part between the first connecting plate 460 and the installation block 44. A second connecting plate 470 is provided inside the semi-circular frame 46. A third telescopic motor 471 is provided on the second connecting plate 470. The contact wheel 47 is rotatably installed between the output shaft of the third telescopic motor 471. The contact wheel 47 is connected with a rotating motor 472.

[0041] Specifically, the semi-circular frame 46 is rotatably installed by the second rotating motor 45. After the cable is clamped and fixed by the clamping mechanism 3, the semi-circular frame 46 is controlled by the second rotating motor 45 to close and wrap the cable between the semi-circular frames 46. The contact wheel 47 abuts against the surface of the cable through the third telescopic motor 471. The rotating motor 472 drives the contact wheel 47 to rotate, thereby driving the semi-circular frame 46 and the camera 461 as a whole to move along the cable, so as to perform the detection operation.

[0042] Furthermore, as Figure 10 、 Figure 11 shown, the suspension pulling mechanism 5 includes a lower slide rail 50 provided in the detection box 1. Two groups of electric sliders 51 are slidably installed on the lower slide rail 50. A rotating frame 52 is rotatably installed on the electric slider 51. The ends of the two rotating frames 52 are rotatably connected. An isosceles triangle structure is formed between the rotating frames 52. A fourth telescopic motor 56 is fixedly provided on the rotation axis of the two rotating frames 52. The fourth telescopic motor 56 is connected with a telescopic rod 57. A suspension block 58 is installed on the telescopic rod 57. The suspension block 58 is connected with a counterweight 59. An arc-shaped pressing block 510 is suspended and installed at the end of the telescopic rod 57. The bottom of the arc-shaped pressing block 510 cooperates with the surface of the cable.

[0043] Specifically, the electric slider 51 moves on the lower slide rail 50 to adjust the included angle between the rotating frames 52, thereby adjusting the height of the arc-shaped pressing block 510. Combining with the fourth telescopic motor 56, the arc-shaped pressing block 510 is placed on the upper surface of the middle part of the cable. The downward pressure of the middle part of the cable is adjusted by the counterweight 59 to simulate the gravity pulling effect on the middle part of the cable installed by long-distance suspension, so as to perform the thermal aging detection.

[0044] Furthermore, as Figure 10 shown, a resistance slide groove 53 is vertically provided in the detection box 1. An extension column 55 is provided on the rotation axis of the two rotating frames 52. A second matching slider 54 is provided at the end of the extension column 55. The second matching slider 54 cooperates with the resistance slide groove 53.

[0045] Specifically, by setting the resistance chute 53, during the continuous thermal aging detection process of the cable, the surface deformation data of the cable is judged by reading the resistance value in the resistance chute 53.

[0046] Further, as Figure 4 , Figure 5 , Figure 6 shown, the clamping mechanism 3 includes a lifting column 30 installed by hanging. The top of the lifting column 30 is connected to the hanging assembly 2. Symmetrically arranged hanging plates 31 are provided at the bottom of the lifting column 30. Symmetrically arranged second fixing plates 32 are provided on the sides of the hanging plates 31. A first telescopic motor 35 is provided on the second fixing plate 32. The first telescopic motor 35 is connected to a mounting plate 33. A fixing shovel 34 is provided on the mounting plate 33. The fixing shovels 34 are symmetrically arranged. A right-angle frame 36 is rotatably installed on the hanging plate 31. A first rotation motor 37 is provided between the right-angle frame 36 and the hanging plate 31. A second telescopic motor 38 is provided on the right-angle frame 36. The second telescopic motor 38 is connected to a wrapping frame 39. A matching notch 313 is provided on the wrapping frame 39. A clamping motor 310 is inclinedly arranged in the wrapping frame 39. The clamping motor 310 is connected to a clamping frame 311. Piercing nails 312 are evenly arranged on the side of the clamping frame 311 facing the cable. The telescopic column 42 is fixedly connected to the right-angle frame 36.

[0047] Specifically, after the cable is placed in the lifting groove 11, the lifting column 30 is controlled to descend. The first telescopic motor 35 drives the fixing shovel 34 to move towards the cable. The fixing shovels 34 on both sides complete the preliminary clamping and fixing of the cable surface. Subsequently, the cable is lifted by the lifting column 30. The lifting groove 11 is controlled to move to the inner wall part of the detection box 1. The right-angle frame 36 is driven to rotate by the first rotation motor 37. The second telescopic motor 38 is combined to enable the cable to pass through the matching notch 313 and fall into the wrapping frame 39. The clamping motor 310 is used to drive the clamping frame 311 to approach the cable. Finally, the piercing nails 312 penetrate into the cable to complete the clamping and fixing of the cable.

[0048] Further, as Figure 3As shown in the figure, the suspension assembly 2 includes an upper slide rail 20 provided at the top of the detection box 1. A first mating slider 21 is slidably mounted on the upper slide rail 20. A first fixing plate 22 is fixedly provided on the upper slide rail 20. A slide bar 24 is provided between the first fixing plate 22 and the side of the detection box 1. A mating post 25 is provided on the first mating slider 21. The mating post 25 is slidably mounted between the slide bar 24. A horizontal ejector rod 23 is provided on the first mating slider 21. A support spring 28 is sleeved on the slide bar 24 between the mating post 25 and the first fixing plate 22. The mating post 25 is horizontally connected to a plugging rod 26. The plugging rod 26 passes through the detection box 1 and is connected to a plug 27. The plug 27 is matched with the placement hole 10. The bottom of the mating post 25 is connected to the clamping mechanism 3.

[0049] Specifically, the clamping mechanism 3 and the detection mechanism 4 are synchronously suspended and installed on the top of the detection box 1 in combination with the suspension assembly 2. After the cable is suspended and fixedly installed, when the middle part of the cable is subjected to bending simulation in combination with the pendant pulling mechanism 5, the two ends of the cable move towards the middle part. At this time, the mating post 25 and the first mating slider 21 move towards the first fixing plate 22 until the end of the ejector rod 23 abuts against the surface of the first fixing plate 22. At this time, the mating post 25 and the plugging rod 26 drive the plug 27 to block the placement groove, ensuring that the temperature inside the detection box 1 is constant during subsequent thermal aging detection.

[0050] Furthermore, as Figure 2 shown, a positioning block 12 is provided at the position of the placement hole 10. A horizontal air cylinder is provided outside the detection box 1. The horizontal air cylinder is connected to the middle part of the lifting groove 11. When the lifting groove 11 is matched with the positioning block 12, the axis of the lifting groove 11 coincides with the axis of the placement hole 10.

[0051] Specifically, the positioning block 12 facilitates positioning the lifting groove 11, ensuring that the cable can be smoothly placed and taken out.

[0052] [[ID=]14]A detection method for a power cable thermal aging detection device as described above includes the following steps: S1. Place the cable to be detected into the lifting groove 11 inside the detection box 1 from the position of the placement hole 10; S2. Control the clamping mechanism 3 to descend into the lifting groove 11, clamp and fix the two ends of the cable, then lift the cable and control the lifting groove 11 to move to the side wall of the detection box 1; S3. Lower the cable and combine the pendant pulling mechanism 5 to perform pendant pulling on the middle part of the cable, so that the cable is in a downward bending shape; S4. Start the fan 100, the irradiation lamp 102, and the heating wire 101 to heat and irradiate the cable, and cooperate with the detection mechanism 4 to detect the surface of the cable.

[0053] The working principle of the embodiment of the present invention is:

[0054] ] [[ID=]20]As Figures 1 - 11As shown, the clamping and fixing mechanism 3 is used to clamp and fix both ends of the cable. Subsequently, the lifting groove 11 is controlled to move to the inner wall part of the detection box 1 to avoid interference with subsequent detections. The middle part of the cable is suspended and pulled by the hanging pulling mechanism 5 to simulate the shape of the middle part of a long-distance installed cable sagging due to its own gravity, approaching the actual installation environment of the cable, and then the cable is subjected to thermal aging detection. The connecting cable 40 is combined to connect the docking column 43 and the semi-circular frame 46. When the semi-circular frame 46 is released by the winding drum, the semi-circular frame 46 moves along the surface of the cable in combination with the contact wheel 47, so as to realize the regular shooting of the cable surface to check the thermal aging situation. During the detection, the semi-circular frame 46 is controlled to close. When the contact wheel 47 rotates in combination with the power component, it will drive the closed semi-circular frame 46 to move along the surface of the cable, so as to realize the rapid detection of the cable surface. After the detection is completed, the connecting cable 40 is recovered by the winding drum, thereby driving the detection mechanism 4 back to the initial position. The semi-circular frame 46 is rotationally installed by the second rotary motor 45. After the cable is clamped and fixed by the clamping mechanism 3, the semi-circular frame 46 is controlled to close by the second rotary motor 45 to wrap the cable between the semi-circular frames 46. The contact wheel 47 abuts against the surface of the cable through the telescopic motor three 471, and the rotating motor 472 drives the contact wheel 47 to rotate, thereby driving the semi-circular frame 46 and the camera 461 as a whole to move along the cable, so as to perform the detection operation. The electric slider 51 moves on the lower slide rail 50 to adjust the included angle between the rotating frames 52, thereby adjusting the height of the arc-shaped pressing block 510. In combination with the telescopic motor four 56, the arc-shaped pressing block 510 is placed on the upper surface of the middle part of the cable, and the downward pressure of the middle part of the cable is adjusted by the counterweight 59 to simulate the gravity pulling effect received by the middle part of a long-distance suspended and installed cable, so as to perform the thermal aging detection. After the cable is placed in the lifting groove 11, the lifting column 30 is controlled to descend. In combination with the telescopic motor one 35, the fixed shovel 34 is driven to move towards the cable. The fixed shovels 34 on both sides complete the preliminary clamping and fixing of the cable surface. Subsequently, the cable is lifted by the lifting column 30, and the lifting groove 11 is controlled to move to the inner wall part of the detection box 1. The right-angle frame 36 is driven to rotate by the first rotary motor 37. In combination with the telescopic motor two 38, the cable passes through the matching notch 313 part and falls into the wrapping frame 39. The clamping motor 310 drives the clamping frame 311 to approach the cable, and finally the puncture nail 312 pierces into the cable to complete the clamping and fixing of the cable. The clamping mechanism 3 and the detection mechanism 4 are synchronously suspended and installed on the top of the detection box 1 in combination with the suspension assembly 2. When the cable is suspended and fixedly installed, when the middle part of the cable is bent and simulated by the hanging pulling mechanism 5, both ends of the cable move towards the middle part. At this time, the matching column 25 moves towards the fixed plate one 22 in combination with the matching slider one 21 until the end of the ejector rod 23 abuts against the surface of the fixed plate one 22. At this time, the matching column 25 drives the plugging rod 26 to drive the plug 27 to block the placement groove, ensuring that the temperature in the detection box 1 is constant during the subsequent thermal aging detection.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. Any reference signs in the claims shall not be construed as limiting the claimed invention.

[0056] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A thermal aging detection device for power cables, comprising a detection box (1). Placement holes (10) are provided on both sides of the detection box (1). A fan (100), a heating wire (101), and an irradiation lamp (102) are further provided inside the detection box (1), characterized in that, At both ends of the top of the detection box (1), suspension components (2) are provided. The suspension components (2) are connected to a clamping mechanism (3). A lifting groove (11) is horizontally installed in the detection box (1). The cable passes through the placement hole (10) and enters the lifting groove (11) in the detection box (1). The clamping mechanism (3) is fixedly installed at both ends of the cable respectively. The clamping mechanism (3) is connected to a detection mechanism (4). A hanging and pulling mechanism (5) is arranged on the lower side of the detection box (1). The hanging and pulling mechanism (5) pulls the middle part of the cable to bend downward; The detection mechanism (4) includes a telescopically column (42) installed by suspension. At the end of the telescopically column (42), a docking column (43) is fitted and installed. At the end of the docking column (43), semi-circular frames (46) are symmetrically installed by rotation. In the semi-circular frames (46), contact wheels (47) are rotatably installed. The semi-circular frames (46) are in contact installation with the outer wall of the cable in combination with the contact wheels (47). At the end of the docking column (43), a connecting cable (40) is provided. The connecting cable (40) passes through the end of the telescopically column (42) and is connected to a winding drum. A camera (461) is arranged on the inner side of the semi-circular frame (46).

2. The thermal aging detection device for a power cable according to claim 1, characterized in that, A guide wheel (41) is fixedly arranged on the side of the telescopically column (42). A docking groove (420) is arranged at the end of the telescopically column (42). After the connecting cable (40) cooperates with the guide wheel (41), it penetrates into the docking groove (420) at the end of the telescopically column (42). A matching protrusion (430) is arranged on the outer side of the docking column (43). The docking column (43) is in mutual cooperation with the docking groove (420) through the matching protrusion (430).

3. The thermal aging detection device for a power cable according to claim 2, characterized in that, An installation block (44) is arranged at the end of the docking column (43). A first connecting plate (460) is arranged on the semi-circular frame (46). The semi-circular frame (46) is rotatably installed with the installation block (44) through the first connecting plate (460). A second rotating motor (45) is arranged at the rotating connection part of the first connecting plate (460) and the installation block (44). A second connecting plate (470) is arranged inside the semi-circular frame (46). A third telescopic motor (471) is arranged on the second connecting plate (470). The contact wheel (47) is rotatably installed with the output shaft of the third telescopic motor (471). The contact wheel (47) is connected to a rotating motor (472).

4. A power cable thermal aging detection device according to claim 1, characterized in that, The hanging and pulling mechanism (5) includes a lower slide rail (50) arranged in the detection box (1). Two groups of electric sliders (51) are slidably mounted on the lower slide rail (50). A rotating frame (52) is rotatably mounted on the electric slider (51). The ends of the two rotating frames (52) on both sides are rotatably connected. An isosceles triangle structure is formed between the rotating frames (52). A fourth telescopic motor (56) is fixedly arranged on the rotation axis of the two rotating frames (52). The fourth telescopic motor (56) is connected with a telescopic rod (57). A hanging block (58) is mounted on the telescopic rod (57). The hanging block (58) is connected with a counterweight block (59). An arc-shaped pressing block (510) is suspended and mounted at the end of the telescopic rod (57). The bottom of the arc-shaped pressing block (510) cooperates with the surface of the cable.

5. The thermal aging detection device for a power cable according to claim 4, wherein A resistance chute (53) is vertically arranged in the detection box (1). An extension column (55) is arranged on the rotation axis of the two rotating frames (52). A second matching slider (54) is arranged at the end of the extension column (55). The second matching slider (54) cooperates with the resistance chute (53).

6. The thermal aging detection device for a power cable according to claim 1, characterized in that, The clamping mechanism (3) includes a vertically arranged lifting column (30) mounted by suspension. The top of the lifting column (30) is connected with a suspension assembly (2). Suspension plates (31) are symmetrically arranged at the bottom of the lifting column (30). Second fixing plates (32) are symmetrically arranged on the sides of the suspension plates (31). A first telescopic motor (35) is arranged on the second fixing plate (32). The first telescopic motor (35) is connected with a mounting plate (33). Fixed shovels (34) are arranged on the mounting plate (33). The fixed shovels (34) are symmetrically arranged. A right-angle frame (36) is rotatably mounted on the suspension plate (31). A first rotating motor (37) is arranged between the right-angle frame (36) and the suspension plate (31). A second telescopic motor (38) is arranged on the right-angle frame (36). The second telescopic motor (38) is connected with a wrapping frame (39). A matching notch (313) is arranged on the wrapping frame (39). A clamping motor (310) is obliquely arranged in the wrapping frame (39). The clamping motor (310) is connected with a clamping frame (311). Piercing nails (312) are evenly arranged on the side of the clamping frame (311) facing the cable. The telescopic column (42) is fixedly connected with the right-angle frame (36).

7. The thermal aging detection device for a power cable according to claim 1, characterized in that, The suspension assembly (2) includes an upper slide rail (20) provided at the top of the detection box (1). A mating slider one (21) is slidably mounted on the upper slide rail (20). A fixing plate one (22) is fixedly provided on the upper slide rail (20). A slide rod (24) is provided between the fixing plate one (22) and the side of the detection box (1). A mating column (25) is provided on the mating slider one (21). The mating column (25) is slidably mounted between the slide rod (24). A horizontal ejector rod (23) is provided on the mating slider one (21). A support spring (28) is sleeved on the slide rod (24) between the mating column (25) and the fixing plate one (22). The mating column (25) is horizontally connected with a plugging rod (26). The plugging rod (26) passes through the detection box (1) and is connected with a plug (27). The plug (27) is matched with the placement hole (10). The bottom of the mating column (25) is connected with the clamping mechanism (3).

8. The thermal aging detection device for a power cable according to claim 1, wherein, A positioning block (12) is provided at the position of the placement hole (10). A horizontal cylinder is provided outside the detection box (1). The horizontal cylinder is connected with the middle part of the lifting groove (11). When the lifting groove (11) is matched with the positioning block (12), the axis part of the lifting groove (11) coincides with the axis of the placement hole (10).

9. A detection method for the power cable thermal aging detection device according to claim 1, characterized in that, It includes the following steps: S1. Place the cable to be detected into the lifting groove (11) in the detection box (1) from the position of the placement hole (10). S2. Control the clamping mechanism (3) to descend into the lifting groove (11), clamp and fix the two ends of the cable, then lift the cable and control the lifting groove (11) to move to the side wall of the detection box (1). S3. Lower the cable and combine with the suspension pulling mechanism (5) to perform suspension pulling on the middle part of the cable, so that the cable is in a downward curved shape. S4. Start the fan (100), the irradiation lamp (102) and the heating wire (101) to heat and irradiate the cable, and cooperate with the detection mechanism (4) to detect the surface of the cable.

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