Power cable thermal aging detection device and method

Abstract

The application discloses a kind of electric power cable thermal aging detection device and method, it is related to cable detection technical field, including detection box, the both sides of detection box are provided with placing hole, fan, heating wire and irradiation lamp are further provided in detection box, the top of detection box both ends is provided with suspension assembly, suspension assembly is connected with clamping mechanism, lifting groove is horizontally installed in detection box, cable passes through placing hole and enters the lifting groove in detection box, clamping mechanism is fixedly installed with the both ends of cable respectively, clamping mechanism is connected with detection mechanism, the downside of detection box is provided with overhanging pulling mechanism, overhanging pulling mechanism pulls the middle part of cable and bends downward;Force state of cable installed in long distance is simulated by overhanging pulling mechanism, then thermal aging simulation detection is carried out, and the accuracy of detection data is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable detection, and in particular to a power cable thermal aging detection device and method. BACKGROUND

[0002] Cable thermal aging detection is an important means to evaluate the performance changes of the cable under long-term heat conditions. When exposed to high temperature, ultraviolet radiation and other harsh conditions for a long time, the insulation material of the cable will age, resulting in a decline in electrical performance, and even may cause safety accidents.

[0003] The existing cable thermal aging simulation detection is time-consuming, and cannot be combined with the cable installation environment for corresponding simulation detection. Especially for long-distance installed cables, the simulated working conditions are quite different from the actual installation environment, and it is difficult to obtain accurate thermal aging detection results. SUMMARY

[0004] The purpose of the present application is to provide a power cable thermal aging detection device and method to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A power cable thermal aging detection device, comprising a detection box, the two sides of the detection box are provided with a placing hole, a fan, heating wires and an irradiation lamp are further arranged in the detection box, the top of the detection box is provided with a suspension assembly at both ends, the suspension assembly is connected with a clamping mechanism, a lifting groove is horizontally installed in the detection box, the cable passes through the placing hole and enters the lifting groove in 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, the lower side of the detection box is provided with a pendant pulling mechanism, and the middle part of the cable is pulled downward by the pendant pulling mechanism.

[0007] The detection mechanism comprises a suspension-mounted telescopic column, a butt joint column is fittedly installed at the end of the telescopic column, a semicircular frame is rotationally installed at the end of the butt joint column, a contact wheel is rotationally installed in the semicircular frame, the semicircular frame is contactly installed between the outer wall of the cable in combination with the contact wheel, a connecting cable is provided at the end of the butt joint column, the connecting cable passes through the end of the telescopic column and is connected with a winding drum, and a camera is arranged on the inner side of the semicircular frame.

[0008] As a further scheme of the present application, a guide wheel is fixedly arranged at the side edge of the telescopic column, a butt joint groove is arranged at the end of the telescopic column, the connecting cable is inserted into the butt joint groove at the end of the telescopic column after mutual cooperation with the guide wheel, a matching protrusion is arranged on the outer side of the butt joint column, and the butt joint column is mutually cooperated between the matching protrusion and the butt joint groove.

[0009] As a further further scheme of the present application: the end of the docking column is provided with a mounting block, the semicircular frame is provided with a connecting plate one, the semicircular frame is rotatably installed between the connecting plate one and the mounting block, the rotating connection part of the connecting plate one and the mounting block is provided with a rotary motor two, the semicircular frame is provided with a connecting plate two, the connecting plate two is provided with a telescopic motor three, the contact wheel is rotatably installed between the output shaft of the telescopic motor three, and the contact wheel is connected with a rotating motor.

[0010] As a further further scheme of the present application: the overhanging pulling mechanism comprises a slide rail arranged in the detection box, two groups of electric sliding blocks are slidably installed on the slide rail, rotating frames are rotatably installed on the electric sliding blocks, the ends of the rotating frames on both sides are rotatably connected, the rotating frames form an isosceles triangle structure, telescopic motors four are fixedly arranged on the rotating axes of the two groups of rotating frames, telescopic rods are connected with the telescopic motors four, suspension blocks are installed on the telescopic rods, counterweight blocks are connected with the suspension blocks, and arc-shaped pressing blocks are suspendedly installed at the ends of the telescopic rods.

[0011] As a further further scheme of the present application: the detection box is vertically provided with a resistance sliding groove, extension columns are arranged on the rotating axes of the two groups of rotating frames, the ends of the extension columns are provided with matched sliding blocks two, and the matched sliding blocks two and the resistance sliding groove are matched with each other.

[0012] As a further further scheme of the present application: the clamping mechanism comprises a suspension-installed lifting column, the top of the lifting column is connected with a suspension assembly, the bottom of the lifting column is symmetrically provided with suspension plates, the side edges of the suspension plates are symmetrically provided with fixed plates two, telescopic motor one is arranged on the fixed plates two, the telescopic motor one is connected with a mounting plate, fixed shovels are arranged on the mounting plate, the fixed shovels are symmetrically arranged, right-angle frames are rotatably installed on the suspension plates, a rotary motor one is arranged between the right-angle frames and the suspension plates, telescopic motor two is arranged on the right-angle frames, a wrapping frame is connected with the telescopic motor two, matched notches are arranged on the wrapping frame, clamping motors are obliquely arranged in the wrapping frame, clamping frames are connected with the clamping motors, puncture nails are uniformly arranged on the side of the clamping frames facing the cable, and the telescopic column and the right-angle frame are fixedly connected.

[0013] As a further embodiment of the present invention: the suspension assembly includes an upper slide rail disposed on the top of the detection box, a first sliding block slidably mounted on the upper slide rail, a first fixing plate fixedly disposed on the upper slide rail, a slide rod disposed on the first fixing plate and the side of the detection box, a first sliding block slidably mounted on the first sliding block, the first sliding block slidably mounted on the slide rod, a first sliding block slidably mounted on the first sliding block, a first supporting spring sleeved on the slide rod between the first sliding block and the first fixing plate, a second sliding block horizontally connected to the second sliding block, the second sliding block extending out of the detection box and connected to a plug, the plug engaging with a placement hole, and the bottom of the second sliding block connected to a clamping mechanism.

[0014] As a further embodiment of the present invention: a positioning block is provided at the placement hole, a horizontal cylinder is provided on the outside of the detection box, the horizontal cylinder is connected to the middle of the lifting groove, and 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 testing method for a power cable thermal aging testing device as described above includes the following steps: S1, placing the cable to be tested into the lifting slot inside the testing box through the placement hole; S2, controlling the clamping mechanism to descend into the lifting slot, clamping and fixing both ends of the cable, then raising the cable and controlling the lifting slot to move to the side wall of the testing box; S3, lowering the cable and using the suspension and pulling mechanism to suspend and pull the middle part of the cable, causing the cable to bend downwards; S4, starting the fan, irradiation lamp, and heating wire to heat and irradiate the cable, and cooperating with the testing mechanism to test the surface of the cable.

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

[0017] (1) The two ends of the cable are clamped and fixed by the clamping mechanism, and then the lifting groove is moved to the inner wall of the test box to avoid interference with subsequent tests. The middle part of the cable is suspended and pulled by the suspension and pulling mechanism to simulate the installation form of the middle part of the cable drooping due to its own weight during long-distance installation, which is close to the actual installation environment of the cable, and then the cable is subjected to thermal aging test.

[0018] (2) By connecting the connecting cable to the docking post and the semi-circular frame, the semi-circular frame is released by winding the drum. The semi-circular frame, along with the contact wheel, moves along the surface of the cable, allowing for timed inspection of the cable surface to check for thermal aging. During inspection, the semi-circular frame is controlled to close. The contact wheel, along with the power component, rotates, causing the closed semi-circular frame to move along the cable surface, thus enabling rapid inspection of the cable surface. After inspection, the connecting cable is retrieved by winding the drum, returning the inspection mechanism to its initial position.

[0019] (3) the fixed spade is moved to the surface of the cable in combination with the telescopic motor, the two sides of the fixed spade complete the primary clamping and fixing of the cable surface, then the cable is lifted in combination with the lifting column, the control lifting groove is moved to the inner wall part of the detection box, the right-angle frame is rotated in combination with the rotating motor, the cable is made to pass through the matching gap part and fall into the wrapping frame in combination with the telescopic motor two, the clamping frame is moved to the cable in combination with the clamping motor, and finally the piercing nail is pierced into the cable to complete the clamping and fixing of the cable.

[0020] (4) the clamping mechanism and the detection mechanism are synchronously hung on the top of the detection box in combination with the hanging assembly, when the cable is hung and fixedly installed, the middle part of the cable is bent and simulated in combination with the overhanging pulling mechanism, the two ends of the cable move to the middle part, at this time, the matching column moves to the fixed plate one in combination with the matching sliding block one, until the top rod end is abutted against the surface of the fixed plate one, at this time, the plug is sealed to the placing groove in combination with the plug rod of the matching column, so that the temperature in the detection box is constant during the subsequent heat aging detection. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0023] Figure 3 It is a schematic diagram of the structure of the hanging assembly in the application.

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

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

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

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

[0028] Figure 8 It is a schematic diagram of the connection of the butt joint column and the telescopic column in the application.

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

[0030] Figure 10 It is a schematic diagram of the structure of the overhanging pulling mechanism in the application.

[0031] Figure 11 It is Figure 10 It is a schematic diagram of the enlarged structure at A in the application.

[0032] In the diagram: 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. Fixing plate one; 23. Top rod; 24. Slide rod; 25. Matching column; 26. Insert rod; 27. Plug; 28. Support spring; 3. Clamping mechanism; 30. Lifting column; 31. Suspension plate; 32. Fixing plate two; 33. Mounting plate; 34. Fixing shovel; 35. Telescopic motor one; 36. Right angle frame; 37. Rotary motor one; 38. Telescopic motor two; 39. Packaging rack; 310. Clamping motor; 311. Clamping frame; 312. Puncture 313. Nail; 4. Detection mechanism; 40. Connecting cable; 41. Guide wheel; 42. Telescopic column; 420. Docking groove; 43. Docking column; 430. Docking protrusion; 44. Mounting block; 45. Rotary motor II; 46. Semicircular frame; 460. Connecting plate I; 461. Camera; 47. Contact wheel; 470. Connecting plate II; 471. Telescopic motor III; 472. Rotating motor; 5. Suspension and pulling mechanism; 50. Lower slide rail; 51. Electric slider; 52. Rotating frame; 53. Resistance slide groove; 54. Docking slider II; 55. Extension column; 56. Telescopic motor IV; 57. Telescopic rod; 58. Suspension block; 59. Counterweight block; 510. Arc-shaped pressure block. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0034] like Figure 1 , Figure 2 As shown, a power cable thermal aging testing device includes a testing box 1. The testing box 1 has placement holes 10 on both sides. Inside the testing box 1, there is also a fan 100, a heating wire 101, and an illumination lamp 102. Suspension assemblies 2 are located at both ends of the top of the testing box 1. The suspension assemblies 2 are connected to clamping mechanisms 3. A lifting groove 11 is horizontally installed inside the testing box 1. The cable passes through the placement holes 10 and enters the lifting groove 11 inside the testing box 1. The clamping mechanisms 3 are fixedly installed at both ends of the cable. The clamping mechanisms 3 are connected to a testing mechanism 4. A suspension pulling mechanism 5 is located on the lower side of the testing box 1. The suspension pulling mechanism 5 pulls the middle of the cable downwards.

[0035] Specifically, before placing the cable, the lifting groove 11 is controlled to reach the position of the placing hole 10, and then the cable is placed into the detection box 1 from the position of the placing hole 10, the other end of the cable is drawn out of the placing hole 10 on the other side of the detection box 1, and a part of the cable is left outside the detection box 1 at both ends, which facilitates the taking out of the cable after the detection is completed. The clamping mechanism 3 is combined to clamp and fix both ends of the cable, and then the lifting groove 11 is controlled to move to the inner wall of the detection box 1, so as to avoid interference with subsequent detection. The middle part of the cable is suspended and pulled by the suspension pulling mechanism 5, so as to simulate the installation form of the middle part of the long-distance installed cable due to its own gravity sag, close to the actual installation environment of the cable, and then the cable is subjected to heat aging detection.

[0036] As shown in Figure 7 , the detection mechanism 4 comprises a suspension installed telescopic column 42, the end of the telescopic column 42 is matched with a docking column 43, the end of the docking column 43 is rotationally and symmetrically installed with a semicircular frame 46, the semicircular frame 46 is rotationally installed with a contact wheel 47, the semicircular frame 46 is combined with the contact wheel 47 and is contact installed between the outer wall of the cable, the end of the docking column 43 is provided with a connecting cable 40, the connecting cable 40 passes through the end of the telescopic column 42 and is connected with a winding drum, the inner side of the semicircular frame 46 is provided with a camera 461.

[0037] Specifically, the connecting cable 40 is connected with the docking column 43 and the semicircular frame 46, when the winding drum releases the semicircular frame 46, the semicircular frame 46 moves along the surface of the cable combined with the contact wheel 47, so as to realize the regular shooting inspection of the heat aging condition of the surface of the cable. When detecting, the semicircular frame 46 is controlled to be folded, and when the contact wheel 47 rotates combined with the power component, the folded semicircular frame 46 is driven to move along the surface of the cable, so as to realize the rapid detection of the surface of the cable. After the detection is completed, the connecting cable 40 is recovered through the winding drum, so as to drive the detection mechanism 4 to return to the initial position.

[0038] Further, as shown in Figure 7 , Figure 8 , the side of the telescopic column 42 is fixedly provided with a guide wheel 41, the end of the telescopic column 42 is provided with a docking groove 420, the connecting cable 40 passes into the docking groove 420 at the end of the telescopic column 42 after being matched with the guide wheel 41, the outer side of the docking column 43 is provided with a matching protrusion 430, and 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 semicircular frame 46, the matching protrusion 430 is positioned between the docking column 43 and the docking groove 420, and the release and recovery of the semicircular frame 46 are quickly completed through the docking groove 420, which facilitates the rapid detection of the heat aging of the surface of the cable.

[0040] Further, as shown in Figure 8 ,Figure 9 As shown, the end of the docking column 43 is provided with a mounting block 44, the semicircular frame 46 is provided with a connecting plate one 460, the semicircular frame 46 is rotatably installed between the connecting plate one 460 and the mounting block 44, the rotating connection position of the connecting plate one 460 and the mounting block 44 is provided with a rotary motor two 45, the semicircular frame 46 is provided with a connecting plate two 470, the connecting plate two 470 is provided with a telescopic motor three 471, the contact wheel 47 is rotatably installed between the output shaft of the telescopic motor three 471, and the contact wheel 47 is connected with a rotating motor 472.

[0041] Specifically, the semicircular frame 46 is rotatably installed through the rotary motor two 45, after the clamping of the cable is completed by the clamping mechanism 3, the semicircular frame 46 is controlled to fold by the rotary motor two 45 to wrap the cable between the semicircular frame 46, the contact wheel 47 abuts against the surface of the cable through the telescopic motor three 471, the rotating motor 472 drives the contact wheel 47 to rotate to drive the semicircular frame 46 and the camera 461 to move along the cable as a whole, so as to perform detection operation.

[0042] Further, as shown in Figure 10 , Figure 11 The overhanging pulling mechanism 5 includes a lower slide rail 50 arranged in the detection box 1, two groups of electric sliding blocks 51 are slidably installed on the lower slide rail 50, rotating frames 52 are rotatably installed on the electric sliding blocks 51, the ends of the rotating frames 52 on both sides are rotatably connected, the rotating frames 52 form an isosceles triangle structure, telescopic motors four 56 are fixedly arranged on the rotating axes of the two groups of rotating frames 52, telescopic rods 57 are connected with the telescopic motors four 56, suspension blocks 58 are installed on the telescopic rods 57, counterweight blocks 59 are connected with the suspension blocks 58, arc-shaped pressing blocks 510 are suspendedly installed at the ends of the telescopic rods 57, and the bottoms of the arc-shaped pressing blocks 510 are matched with the surface of the cable.

[0043] Specifically, the electric sliding blocks 51 move on the lower slide rail 50 to adjust the included angle between the rotating frames 52, so as to adjust the height of the arc-shaped pressing blocks 510, the arc-shaped pressing blocks 510 are placed on the upper surface of the middle part of the cable through the telescopic motor four 56, the counterweight block 59 adjusts the downward pressure of the middle part of the cable, the gravity pulling effect of the middle part of the cable installed in a long distance suspension mode is simulated, and thus the heat aging detection is performed.

[0044] Further, as shown in Figure 10 The resistance slide groove 53 is vertically arranged in the detection box 1, the extension columns 55 are arranged on the rotating axes of the two groups of rotating frames 52, the ends of the extension columns 55 are provided with matching slide blocks two 54, and the matching slide blocks two 54 are matched with the resistance slide groove 53.

[0045] Specifically, by setting the resistance sliding slot 53, the cable continuously carries out the heat aging detection process by reading the resistance value in the resistance sliding slot 53 to judge the cable surface deformation data.

[0046] Further, as shown in Figure 4 、 Figure 5 、 Figure 6 The clamping mechanism 3 includes a suspension-mounted lifting column 30, the top of the lifting column 30 is connected with the suspension assembly 2, the bottom of the lifting column 30 is symmetrically provided with a suspension plate 31, the side edges of the suspension plate 31 are symmetrically provided with a fixed plate two 32, the fixed plate two 32 is provided with a telescopic motor one 35, the telescopic motor one 35 is connected with a mounting plate 33, the mounting plate 33 is provided with a fixed shovel 34, the fixed shovel 34 is symmetrically provided, the suspension plate 31 is rotatably provided with a right-angle frame 36, the right-angle frame 36 and the suspension plate 31 are provided with a rotating motor one 37, the right-angle frame 36 is provided with a telescopic motor two 38, the telescopic motor two 38 is connected with a wrapping frame 39, the wrapping frame 39 is provided with a matching notch 313, the wrapping frame 39 is obliquely provided with a clamping motor 310, the clamping motor 310 is connected with a clamping frame 311, the clamping frame 311 is uniformly provided with a puncture nail 312 on the side facing the cable, and the telescopic column 42 is fixedly connected with 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 fixed shovel 34 is driven by the telescopic motor one 35 to move towards the cable, and the two fixed shovels 34 complete the preliminary clamping and fixing of the surface of the cable. Then, the cable is lifted by the lifting column 30, the lifting groove 11 is moved to the inner wall part of the detection box 1, the right-angle frame 36 is rotated by the rotating motor one 37, the cable passes through the matching notch 313 part and falls into the wrapping frame 39 by the telescopic motor two 38, the clamping frame 311 is driven by the clamping motor 310 to move towards the cable, and finally the puncture nail 312 pierces into the cable to complete the clamping and fixing of the cable.

[0048] Further, as shown in Figure 3As shown, the suspension assembly 2 comprises an upper sliding rail 20 arranged at the top of the detection box 1, a matching sliding block one 21 is slidingly installed on the upper sliding rail 20, a fixed plate one 22 is fixedly arranged on the upper sliding rail 20, a sliding rod 24 is arranged on the side of the fixed plate one 22, a matching column 25 is arranged on the matching sliding block one 21, the matching column 25 is slidingly installed between the sliding rod 24, a horizontal top rod 23 is arranged on the matching sliding block one 21, a supporting spring 28 is sleeved on the sliding rod 24 between the matching column 25 and the fixed plate one 22, the matching column 25 is horizontally connected with a plug-in rod 26, the plug-in rod 26 penetrates through the detection box 1 and is connected with a plug 27, the plug 27 cooperates with the placement hole 10, and the bottom of the matching column 25 is connected with the clamping mechanism 3.

[0049] Specifically, the clamping mechanism 3 and the detection mechanism 4 are synchronously suspended on the top of the detection box 1 in combination with the suspension assembly 2, after the cable is suspended and fixedly installed, the middle part of the cable is bent and simulated in combination with the suspension and pulling mechanism 5, the two ends of the cable move to the middle part, at this time, the matching column 25 moves to the fixed plate one 22 in combination with the matching sliding block one 21, until the end of the top rod 23 abuts against the surface of the fixed plate one 22, at this time, the plug 27 seals the placement groove in combination with the plug-in rod 26, so that the temperature in the detection box 1 is constant during subsequent heat aging detection.

[0050] Further, as shown in the figure, Figure 2 The outer side of the detection box 1 is provided with a horizontal air cylinder, the horizontal air cylinder is connected with the middle part of the lifting groove 11, and when the lifting groove 11 cooperates with the positioning block 12, the axis part of the lifting groove 11 and the axis of the placement hole 10 coincide with each other.

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

[0052] A detection method of the power cable heat aging detection device, comprising the following steps: S1, placing the cable to be detected from the placement hole 10 into the lifting groove 11 in the detection box 1; S2, controlling the clamping mechanism 3 to descend into the lifting groove 11, clamping and fixing the two ends of the cable, then lifting the cable and controlling the lifting groove 11 to move to the side wall of the detection box 1; S3, lowering the cable and suspending and pulling the middle part of the cable in combination with the suspension and pulling mechanism 5, so that the cable assumes a downward bending shape; S4, starting the fan 100 and the irradiation lamp 102 and the heating wire 101 to heat and irradiate the cable, and cooperating with the detection mechanism 4 to detect the surface of the cable.

[0053] The working principle of the embodiment of the application is as follows:

[0054] As shown in the figure, Figures 1-11As shown, the two ends of the cable are clamped and fixed by the clamping mechanism 3, and then the control lifting groove 11 moves to the inner wall part of the detection box 1 to avoid interference with subsequent detection. The middle part of the cable is suspended and pulled by the suspension pulling mechanism 5 to simulate the sagging shape of the middle part of the long-distance installed cable due to its own gravity, close to the actual installation environment of the cable, and then the cable is subjected to heat aging detection. The connecting cable 40 is connected to the docking column 43 and the semicircular frame 46, and when the semicircular frame 46 is released by winding the drum, the semicircular frame 46 moves along the surface of the cable in combination with the contact wheel 47, thereby realizing the timed shooting inspection of the heat aging condition of the surface of the cable. When detecting, control the semicircular frame 46 to close, and when the contact wheel 47 rotates in combination with the power component, it will drive the closed semicircular frame 46 to move along the surface of the cable, thereby realizing the rapid detection of the surface of the cable. After the detection is completed, the connecting cable 40 is recovered by the winding drum, thereby driving the detection mechanism 4 to return to the initial position. The semicircular frame 46 is installed by rotating motor two 45, and after the clamping mechanism 3 completes the clamping and fixing of the cable, the semicircular frame 46 is controlled by rotating motor two 45 to close and wrap the cable between the semicircular frame 46, the contact wheel 47 is abutted on the surface of the cable by the extension motor three 471, and the rotating motor 472 drives the contact wheel 47 to rotate, thereby driving the semicircular frame 46 and the camera 461 to move along the cable as a whole, thereby performing detection operation. The electric sliding block 51 moves on the lower sliding rail 50 to adjust the included angle between the rotating frames 52, thereby adjusting the height of the arc-shaped pressing block 510, and the extension motor four 56 is combined to make the arc-shaped pressing block 510 placed on the upper surface of the middle part of the cable, and the counterweight 59 adjusts the downward pressure of the middle part of the cable, simulates the gravity pulling effect on the middle part of the long-distance suspended and installed cable, thereby performing heat aging detection. After the cable is placed in the lifting groove 11, the lifting column 30 is controlled to descend, the fixed spade 34 is driven to move towards the cable in combination with the extension motor one 35, and the two fixed spades 34 complete the preliminary clamping and fixing of the surface of the cable, and then the lifting column 30 is controlled to lift the cable, the lifting groove 11 is moved to the inner wall part of the detection box 1, the right-angle frame 36 is driven to rotate by the rotating motor one 37, the cable passes through the matching gap 313 part and falls into the wrapping frame 39 in combination with the extension motor two 38, the clamping frame 311 is driven to close to the cable by the clamping motor 310, and finally the piercing nails 312 pierce into the cable to complete the clamping and fixing of the cable. The clamping mechanism 3 and the detection mechanism 4 are combined with the suspension assembly 2 to be suspended and installed on the top of the detection box 1 synchronously, when the cable is suspended and fixedly installed, the middle part of the cable is bent and simulated in combination with the suspension pulling mechanism 5, the two 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 sliding block one 21 until the end of the jacking rod 23 is abutted on the surface of the fixed plate one 22, at this time the plug 27 plugs the placing groove in combination with the plug-in rod 26 to ensure that the temperature in the detection box 1 is constant during subsequent heat aging detection.

[0055] The above merely describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. Any reference sign in the claims shall not be considered as limiting the involved claims.

[0056] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. A power cable thermal aging detection device, comprising a detection box (1), both sides of the detection box (1) are provided with a placing hole (10), and a fan (100), a heating wire (101) and an irradiation lamp (102) are further arranged in the detection box (1), characterized in that, The both ends of the top of the detection box (1) are provided with hanging assemblies (2), the hanging assemblies (2) are connected with clamping mechanisms (3), horizontal lifting grooves (11) are installed in the detection box (1), cables pass through placing holes (10) and enter the lifting grooves (11) in the detection box (1), the clamping mechanisms (3) are fixedly installed with the both ends of the cables respectively, the clamping mechanisms (3) are connected with detection mechanisms (4), the undersides of the detection box (1) are provided with overhanging pulling mechanisms (5), the overhanging pulling mechanisms (5) pull the middle parts of the cables to bend downwards; The detection mechanisms (4) comprise suspendingly installed telescopic columns (42), the ends of the telescopic columns (42) are cooperatively installed with butt joint columns (43), the ends of the butt joint columns (43) are rotatably and symmetrically installed with semicircular frames (46), the semicircular frames (46) are rotatably installed with contact wheels (47), the semicircular frames (46) are contactly installed between the outer walls of the cables in combination with the contact wheels (47), the ends of the butt joint columns (43) are provided with connecting ropes (40), the connecting ropes (40) pass through the ends of the telescopic columns (42) and are connected with winding drums, the inner sides of the semicircular frames (46) are provided with cameras (461). The clamping mechanisms (3) comprise suspendingly installed lifting columns (30), the tops of the lifting columns (30) are connected with the hanging assemblies (2), the bottoms of the lifting columns (30) are symmetrically provided with suspending plates (31), the side edges of the suspending plates (31) are symmetrically provided with fixed plates two (32), the fixed plates two (32) are provided with telescopic motors one (35), the telescopic motors one (35) are connected with mounting plates (33), the mounting plates (33) are provided with fixed shovels (34), the fixed shovels (34) are symmetrically provided, the suspending plates (31) are rotatably installed with right angle frames (36), the right angle frames (36) and the suspending plates (31) are provided with rotating motors one (37), the right angle frames (36) are provided with telescopic motors two (38), the telescopic motors two (38) are connected with wrapping frames (39), the wrapping frames (39) are provided with cooperatively notched portions (313), the wrapping frames (39) are obliquely provided with clamping motors (310) therein, the clamping motors (310) are connected with clamping frames (311), the sides of the clamping frames (311) facing the cables are uniformly provided with piercing nails (312), the telescopic columns (42) and the right angle frames (36) are fixedly connected.

2. The power cable thermal aging detection device according to claim 1, characterized in that, The side edges of the telescopic columns (42) are fixedly provided with guide wheels (41), the ends of the telescopic columns (42) are provided with butt joint grooves (420), the connecting ropes (40) pass into the butt joint grooves (420) in the ends of the telescopic columns (42) after mutual cooperation with the guide wheels (41), the outer sides of the butt joint columns (43) are provided with cooperatively protrusions (430), the butt joint columns (43) are mutually cooperated between the cooperatively protrusions (430) and the butt joint grooves (420).

3. The power cable thermal aging detection device according to claim 2, characterized in that, The end of the butt joint column (43) is provided with a mounting block (44), the semicircular frame (46) is provided with a connecting plate I (460), the semicircular frame (46) is rotatably connected between the connecting plate I (460) and the mounting block (44), the connecting plate I (460) and the rotating connection part of the mounting block (44) are provided with a rotary motor II (45), the semicircular frame (46) is provided with a connecting plate II (470), the connecting plate II (470) is provided with a telescopic motor III (471), the contact wheel (47) is rotatably connected between the output shaft of the telescopic motor III (471), and the contact wheel (47) is connected with a rotary motor (472).

4. The power cable thermal aging detection device according to claim 1, characterized in that, The overhanging pulling mechanism (5) comprises a lower sliding rail (50) arranged in the detection box (1), two groups of electric sliding blocks (51) are slidably arranged on the lower sliding rail (50), rotary frames (52) are rotatably arranged on the electric sliding blocks (51), the ends of the rotary frames (52) on both sides are rotatably connected, the rotary frames (52) between the two groups form an isosceles triangle structure, telescopic motors IV (56) are fixedly arranged on the rotary axes of the two groups of rotary frames (52), telescopic rods (57) are connected with the telescopic motors IV (56), suspension blocks (58) are arranged on the telescopic rods (57), counterweight blocks (59) are connected with the suspension blocks (58), arc-shaped pressing blocks (510) are suspendedly arranged at the ends of the telescopic rods (57), and the bottoms of the arc-shaped pressing blocks (510) are matched with the surface of the cable.

5. The power cable thermal aging detection device according to claim 4, characterized in that, The detection box (1) is vertically provided with a resistance sliding groove (53), and the rotary axes of the two groups of rotary frames (52) are provided with extension columns (55). The ends of the extension columns (55) are provided with matched sliding blocks II (54), and the matched sliding blocks II (54) and the resistance sliding groove (53) are matched with each other.

6. The power cable thermal aging detection device according to claim 1, characterized in that, The suspension assembly (2) comprises an upper sliding rail (20) arranged at the top of the detection box (1), a matched sliding block I (21) slidably arranged on the upper sliding rail (20), a fixed plate I (22) fixedly arranged on the upper sliding rail (20), a sliding rod (24) arranged between the fixed plate I (22) and the side of the detection box (1), a matched column (25) arranged on the matched sliding block I (21), the matched column (25) and the sliding rod (24) being slidably arranged, a horizontal top rod (23) arranged on the matched sliding block I (21), a support spring (28) sleeved on the sliding rod (24) between the matched column (25) and the fixed plate I (22), a plug-in rod (26) horizontally connected with the matched column (25), the plug-in rod (26) penetrating out of the detection box (1) and being connected with a plug (27), the plug (27) and the placing hole (10) being matched with each other, and the bottom of the matched column (25) is connected with the clamping mechanism (3).

7. The power cable thermal aging detection device according to claim 1, characterized in that, The position of the placing hole (10) is provided with a positioning block (12), the outer side of the detection box (1) is provided with a horizontal air cylinder, the horizontal air cylinder is connected with the middle part of the lifting groove (11), and the axis part of the lifting groove (11) coincides with the axis of the placing hole (10) when the lifting groove (11) cooperates with the positioning block (12).

8. A detection method of the power cable heat aging detection apparatus according to claim 1, characterized by, The method comprises the following steps: S1, the cable to be detected is placed into the lifting groove (11) in the detection box (1) from the position of the placing hole (10); S2, the clamping mechanism (3) is controlled to descend into the lifting groove (11), the two ends of the cable are clamped and fixed, then the cable is lifted, and the lifting groove (11) is controlled to move to the side wall of the detection box (1); S3, the cable is lowered, and the middle part of the cable is suspended and pulled in combination with the suspension and pulling mechanism (5), so that the cable is in a downward bending shape; S4, the fan (100), the irradiation lamp (102) and the heating wire (101) are started to heat and irradiate the cable, and the detection mechanism (4) is used to detect the surface of the cable.

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