Busbar insulation layer detection device

Abstract

The application relates to the technical field of insulation detection, and discloses a busbar insulation layer detection equipment, which comprises a detection table provided with a table top, a transparent cover shell arranged above the table top, a flip cover arranged on the front side of the transparent cover shell, a control panel and a voltage supply module arranged on the front side of the detection table, a grounding module arranged on the rear side of the detection table, a busbar arrangement module and a sand point detection module arranged on the table top, wherein the voltage supply module is connected with the busbar and the sand point detection module through an extension connection module; the busbar arrangement module comprises a fixed support arranged on the front side of the table top and a sliding support arranged on the table top in a sliding mode, the sliding support is driven by a moving module arranged below the table top, and the fixed support and the sliding support are respectively provided with busbar clamping structures; compared with the prior art, the application has the advantages that the busbar can be automatically supplied with voltage and the insulation layer resistance can be detected in an isolated space, the application is safer, and whether the insulation layer has sand points can be detected.

Description

Technical Field

[0001] This invention relates to the field of insulation testing technology, specifically to a busbar insulation layer testing device. Background Technology

[0002] Busbars are bare conductors or stranded wires that connect various voltage distribution devices in a substation, as well as electrical equipment such as transformers and their corresponding distribution devices. The main function of busbars is to collect, distribute, and transmit electrical energy. They mainly include rigid busbars, flexible busbars, and enclosed busbars. Rigid and flexible busbars are wrapped with an insulation layer to isolate the conductor from the external environment and prevent current leakage or short circuit accidents.

[0003] However, during use, the insulation layer of busbars can be damaged due to high temperatures, wear, oxidation, etc., leading to a decrease in its insulation effect and even the appearance of pinholes or broken points, resulting in current leakage or short circuit accidents. Existing busbar insulation layer inspection methods simply rely on visual inspection to check whether the insulation layer is intact and use a megohmmeter to measure the insulation layer resistance. This method can only inspect a certain part of the insulation layer, which has limitations and biases. It is difficult to detect small pinholes in the insulation layer and cannot eliminate the risk of current leakage or short circuit accidents. Moreover, when measuring with a megohmmeter, the personnel are at close range. If the voltage is too high and the insulation layer is broken down by current, an arc discharge may occur, posing a danger of electric shock and fire to the surrounding personnel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a busbar insulation layer testing device, which can automatically supply voltage and test insulation layer resistance of the busbar in an isolated space, and can also perform sand spot detection and withstand voltage test on the busbar insulation layer.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] A busbar insulation layer testing device, comprising:

[0007] The testing platform is equipped with a tabletop, and a transparent cover is installed above the tabletop. The front of the transparent cover is open and has a flip cover. The front of the testing platform is equipped with a control panel and a pressure supply module, and the rear is equipped with a grounding module. The tabletop is equipped with a busbar arrangement module and a sand spot detection module.

[0008] The pressure supply module is connected to the busbar and the sand spot detection module through an extension connection module;

[0009] The busbar arrangement module includes a fixed support on the front side of the platform and a sliding support that slides back and forth on the platform. The sliding support is driven by a moving module located below the platform, and the fixed support and the sliding support are respectively provided with busbar clamping structures.

[0010] Furthermore, the busbar clamping structure includes a mounting ring rotatably mounted on the top of the fixed support and the sliding support. A clamping bevel ring and a clamping bevel gear are rotatably mounted inside the mounting ring. Multiple clamping bevel gears are circumferentially arranged along the outer edge of the clamping bevel ring and mesh with it. Adjusting screws are mounted on the rotating shafts of each gear. Multiple clamping plates are slidably mounted on the inner side of the mounting ring corresponding to the clamping bevel gears, and each clamping plate has a threaded sleeve that threadedly engages with the corresponding adjusting screw. A knob is rotatably mounted on the outer side of the mounting ring and is connected to one of the clamping bevel gears. Rotating the knob causes each clamping plate to move radially along the mounting ring.

[0011] Furthermore, the fixed support is equipped with a hand-cranked module, including a transmission bevel gear ring rotatably mounted on the rear side of the fixed support and fixedly connected to the mounting collar, a transmission bevel gear meshing with the transmission bevel gear ring rotatably mounted on the platform, a crank handle rotatably mounted on one side of the platform, and the crank handle shaft and the transmission bevel gear shaft are connected by a gear set provided below the platform. After the crank handle rotates, the transmission bevel gear ring drives the busbar clamping structure to rotate.

[0012] Furthermore, the pressure supply module includes a megohmmeter, with an L-line and an E-line on the top of the megohmmeter, a generator inside, and a voltage regulating motor on the outside. The generator shaft is connected to the voltage regulating motor drive shaft. After the voltage regulating motor rotates, a voltage difference is generated between the L-line and E-line of the megohmmeter.

[0013] Furthermore, the extended connection module includes an L-end expansion dock and an E-end expansion dock. The E-end expansion dock is set on the platform in front of the fixed support. The front side is provided with an E-end interface and connected to the E-line. Sand spot detection lines and insulation detection lines are respectively provided on both sides, and power switches are provided for the sand spot detection lines and insulation detection lines. An E-end electric clamp is provided at the other end of the insulation detection line, and a detection connector is provided at the other end of the sand spot detection line. The L-end expansion dock is set on the top of the E-end expansion dock. The front side is provided with an L-end interface that is connected to the L-line. The top is connected to the L-end electric clamp and the busbar connector through wires, and a power switch is provided for each wire.

[0014] Furthermore, the sand spot detection module includes a conveyor belt and a positioning rod. A platform is provided on one side of the platform, and the top surface of the platform is inclined inward. The conveyor belt is placed on the top surface of the platform. The positioning rod is horizontally arranged, with a carbon brush at one end and a downwardly inclined positioning handle at the other end. The positioning handle is rotatably set in the positioning sleeve of the conveyor belt. A second slide groove is provided on the platform, and a positioning slider is slidably arranged back and forth in the second slide groove. A positioning upright is slidably arranged on the positioning slider, and the top of the positioning upright is movably sleeved on the positioning rod. A detection interface is provided on the carbon brush and connected to the detection connector. After the conveyor belt is started, it drives the carbon brush to brush the insulation layer of the busbar.

[0015] Furthermore, a sliding base is slidably arranged on the platform, and a vertical rod is slidably arranged on the sliding base. A flip rod is hinged to the top of the vertical rod, and a busbar clamp is provided at the other end of the flip rod. Wire clamps are provided on both sides, and the wire clamps are adapted to the insulation detection wire and the grounding wire of the grounding module. The insulation detection wire and the grounding wire are respectively arranged on both sides of the flip rod through the wire clamps.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. This invention is equipped with a busbar arrangement module and a transparent cover. With the busbar arrangement module, the operator only needs to be in front of the table to complete the busbar arrangement work and automatically arrange the busbars straight on the test table surface, so as to facilitate the test and observation of the busbars. The transparent cover can isolate the table surface to avoid the generation of electric arc discharge and cause harm to the surrounding personnel, making it more convenient and safer to use.

[0018] 2. This invention is equipped with a sand spot detection module, which can detect the busbar insulation layer through a carbon brush. When the carbon brush comes into contact with the sand spot in the busbar insulation layer, a current loop is generated, causing the carbon brush bristles to produce sparks. The number of sand spots in the busbar insulation layer is displayed according to the number of sparks generated, which more intuitively shows the integrity and effectiveness of the busbar insulation layer. The detection effect is more comprehensive and the detection capability is stronger, and it is more convenient and safer to use.

[0019] 3. This invention is equipped with a pressure supply module, a sand spot detection module, a grounding module, etc. By selecting different connection methods, the insulation layer of the busbar insulation layer can be tested for insulation resistance, sand spots, and withstand voltage. The insulation properties of the insulation layer can be tested from multiple aspects such as resistance, integrity, and withstand voltage performance, which has stronger testing capabilities and more comprehensive and reliable testing results.

[0020] 4. The generator shaft of the megohmmeter in the pressure supply module of this invention is connected to the motor. Compared with the existing hand-cranked power supply method of megohmmeter, the magnitude of the supplied voltage can be adjusted by controlling the speed of the motor, so as to detect the bus insulation layer under different voltages. Moreover, the supply voltage difference is more stable, it is more convenient to use, and the detection effect is more comprehensive. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram of the countertop structure of the present invention.

[0023] Figure 3 This is a schematic diagram showing the unfolded structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the busbar arrangement module of the present invention.

[0025] Figure 5 This is a cross-sectional schematic diagram of the busbar clamping structure of the present invention.

[0026] Figure 6 This is a schematic diagram showing the unfolded structure of the busbar clamping structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure of the hand-cranked module of the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the sand spot detection module of the present invention.

[0029] Figure 9 This is a schematic diagram of the carbon brush structure of the present invention.

[0030] Figure 10 This is a schematic diagram of the structure of the follower bracket of the present invention.

[0031] Figure 11 This is a schematic diagram showing the unfolded structure of the follower bracket of the present invention.

[0032] Figure 12 This is a schematic diagram of the pressure supply module of the present invention.

[0033] Figure 13 This is a schematic diagram of the structure of the extended connection module of the present invention.

[0034] Figure 14 This is a schematic diagram of the grounding module of the present invention.

[0035] As shown in the figure: 1. Testing platform; 11. Platform surface; 111. Slide 1; 112. Slide rail; 113. Arrangement platform; 114. Slide 2; 12. Transparent cover; 121. Flip cover; 13. Control panel; 14. Camera; 2. Busbar arrangement module; 21. Fixed support; 22. Sliding support; 23. Busbar clamping structure; 231. Mounting collar; 232. Clamping bevel gear ring; 233. Clamping bevel gear. 234. Adjusting screw; 235. Threaded sleeve; 236. Clamping plate; 237. Knob; 24. Hand crank module; 241. Transmission bevel gear ring; 242. Transmission bevel gear; 243. Gear seat; 244. Driven bevel gear; 245. Driving bevel gear; 246. Hand crank; 247. Bearing seat; 25. Moving module; 251. Moving motor; 252. Moving screw; 253. Moving connecting rod; 26. Cover 3. Housing, 4. Pressure supply module, 5. Megohmmeter, 6. L-line, 7. E-line, 8. Voltage regulating motor, 9. Follower bracket, 10. Sliding base, 11. Upright pole, 12. Flip bar, 13. Busbar clamp, 14. Wire clamp, 15. Sand spot detection module, 16. Conveyor belt, 17. Positioning sleeve, 18. Positioning rod, 19. Positioning handle, 10. Carbon brush, 11. Detection interface, 12. Positioning upright pole, 13. Positioning rod, 14. Positioning arm, 15. Positioning arm, 16. Positioning arm, 17. Positioning arm, 18. Positioning arm, 19. Positioning arm, 10 ... 6. Grounding module, 61. Grounding flat iron, 62. Grounding wire, 63. Grounding clamp, 7. Extension connection module, 71. L-end expansion dock, 711. L-end interface, 712. L-end clamp, 713. Busbar connector, 72. E-end expansion dock, 721. E-end interface, 722. Sand spot detection line, 723. Insulation detection line, 724. Detection connector, 725. E-end clamp, 73. Power switch. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings.

[0037] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 3As shown, a busbar insulation layer testing device includes a testing platform 1, which has a horizontal platform 11. A first slide groove 111 is provided in the middle of the platform 11, a slide rail 112 is provided on one side, and a placement platform 113 is provided on the other side. A second slide groove 114 is provided between the placement platform 113 and the first slide groove 111. The first slide groove 111, slide rail 112, placement platform 113, and second slide groove 114 are all arranged front-to-back. The top surface of the placement platform 113 is a plane that gradually slopes downwards from the outside to the inside. A transparent cover 12 is provided above the platform 11. A camera 14 is provided on one side of the shell 12, and the front side is open and has a flip cover 121. The flip cover 121 is hinged to the front top of the transparent shell 12, and after being flipped up, the front part of the table 11 is exposed. The front side of the detection table 1 is provided with a control panel 13 and a pressure supply module 3, and the rear side is provided with a grounding module 6. The table 11 is provided with a busbar arrangement module 2 and a sand spot detection module 5. The pressure supply module 3 is connected to the sand spot detection module 5 and the busbar arranged on the busbar arrangement module 2 through an extension connection module 7. A follower bracket 4 is provided on the slide rail 112.

[0038] In the above description, after opening the flip cover 121 and arranging the busbar directly above the slide groove 111 via the busbar arrangement module 2, the voltage supply module 3 is connected to one end of the busbar and one point on the outside of the insulation layer via the extension connection module 7. The control panel 13 is operated, and after voltage is supplied by the voltage supply module 3, the resistance value of the insulation layer is detected. If current is detected, the insulation layer has failed and broken down. After the detection is completed, the connection is disconnected, and the voltage supply module 3 is connected to one end of the busbar and the sand spot detection module 5 via the extension connection module 7. Next, the sand spot detection module 5 is used to detect the sand spots on the busbar insulation layer. After the detection is completed, the connection is disconnected again, and the two ends of the busbar are connected to the voltage supply module 3 and the grounding module 6 respectively. The voltage supply module 3 continuously provides high voltage to the busbar. The withstand voltage performance of the busbar insulation layer is tested by observing whether the busbar insulation layer breaks down and generates an electric arc. During the inspection, the flip cover 121 is closed, so that the busbar is isolated in the transparent cover 12 to prevent the electric arc discharge generated after the busbar insulation layer is broken down during the inspection from causing injury to the surrounding personnel.

[0039] Combined with appendix Figure 3 Appendix Figure 4As shown, the busbar arrangement module 2 includes a fixed support 21 disposed on the front side of the platform 11 and a sliding support 22 slidably disposed on the slide groove 111. The sliding support 22 is driven by a moving module 25 disposed below the platform 11. The fixed support 21 and the sliding support 22 are respectively provided with busbar clamping structures 23. The fixed support 21 is also provided with a hand-cranked module 24 for controlling the rotation of the busbar clamping structures 23. The moving module 25 includes a moving motor 251 and a moving screw 252 disposed below the platform 11. The moving screw 252 is arranged horizontally back and forth, with one end rotatably disposed on the detection table 1 and the other end connected to the drive shaft of the moving motor 251. A moving connecting rod 253 is threadedly sleeved on the moving screw 252, and the top of the moving connecting rod 253 is connected to the sliding support 22.

[0040] Combined with appendix Figure 4 Appendix Figure 5 Appendix Figure 6 As shown, the busbar clamping structure 23 includes a mounting collar 231 rotatably mounted on the top of the fixed support 21 and the sliding support 22. A clamping bevel ring 232 and a clamping bevel gear 233 are rotatably mounted inside the mounting collar 231. Three clamping bevel gears 233 are circumferentially arranged around the outer edge of the clamping bevel ring 232 and mesh with it. Adjusting screws 234 are mounted on the rotating shaft, and threaded sleeves 235 are threaded onto the adjusting screws 234. Clamping plates 236, slidably mounted inside the mounting collar 231, are connected to both sides of the threaded sleeves 235. The clamping plates 236 are staggered along the front and rear sides (the shape of the clamping plates 236 is shown in the attached figure). Figure 6 As shown, the clamping plates 236 between the two threaded sleeves 235 are attached together from front to back. The clamping surfaces of the clamping plates 236 are respectively provided with insulating pads. A knob 237 is rotatably provided on the outside of the mounting ring 231, and the knob 237 is connected to one of the clamping bevel gears 233.

[0041] Combined with appendix Figure 4 Appendix Figure 7As shown, a hand-cranked module 24 is provided on the fixed support 21, including a transmission bevel gear ring 241 rotatably disposed on the rear side of the fixed support 21 and connected and fixed together with the mounting collar 231 (the shafts of the transmission bevel gear ring 241 and the mounting collar 231 are both tubular and connected and fixed together). A gear seat 243 is provided on the platform 11, and a transmission bevel gear 242 that meshes with the transmission bevel gear ring 241 is rotatably disposed on the top of the gear seat 243, and the shaft of the transmission bevel gear 242 passes through the platform 11. It is then connected to the driven bevel gear 244 located under the platform 11. A bearing seat 247 is provided on one side of the bottom surface of the platform 11. A rocker arm 246 is rotatably mounted on the bearing seat 247. A driving bevel gear 245 that meshes with the driven bevel gear 244 is mounted on the shaft of the rocker arm 246. A cover 26 is provided on the rear side of the fixed support 21. The transmission bevel ring 241, the transmission bevel gear 242 and the gear seat 243 are respectively located inside the cover 26. The cover 26 shields the gears to prevent the cable from getting caught in the gears.

[0042] In the above description, after opening the flip cover 121, the busbar is a rigid busbar. After passing one end of the busbar through the two busbar clamping structures 23, the knob 237 of the rear busbar clamping structure 23 is rotated to clamp one end of the busbar onto the sliding support 22. The control panel 13 is operated to turn on the moving motor 251, thereby causing the sliding support 22 to move backward along the slide groove 111 and pull the busbar until the busbar is positioned above the slide groove 111. Then, the knob 237 of the front busbar clamping structure 23 is rotated to clamp the other end of the busbar onto the fixed support 21, thereby supporting and fixing the rigid busbar. If the busbar is a flexible busbar, both ends of the busbar are respectively connected through the busbar clamping structure. The structure 23 is fixed on the sliding support 22 and the fixed support 21. The moving motor 251 is turned on, so that the sliding support 22 moves backward along the slide groove 111 and pulls the busbar until the busbar is straight and directly supported above the slide groove 111, thus completing the arrangement of the busbar and making it easier to connect the busbar. When the busbar needs to be rotated, the crank handle 246 is rotated. Under the action of the gear set, the bevel gear ring 232 is used to drive the busbar clamping structure 23 on the fixed support 21 to rotate, thereby driving the busbar to rotate (when the busbar is a soft busbar, a certain amount of torsion will occur during the rotation, which can be eliminated by rotating the crank handle 246 in the opposite direction).

[0043] Combined with appendix Figure 1 Appendix Figure 2 Appendix Figure 10 Appendix Figure 11 As shown, the follower bracket 4 includes a sliding base 41 slidably mounted on a slide rail 112. A vertical rod 42 is slidably mounted on the sliding base 41. A flip rod 43 is hinged to the top of the vertical rod 42 (the flip rod 43 is horizontally arranged and abuts against the top of the vertical rod 42). A busbar clamp 44 is provided at the other end of the flip rod 43, and wire clamps 45 are provided on both sides. The entire follower bracket 4 is made of insulating material.

[0044] As described above, after pulling the flip lever 43 and clamping the busbar clamp 44 onto the busbar, the moving module 25 is activated, and the sliding support 22 drives the busbar to move. At the same time, the busbar drives the follower bracket 4 to slide along the slide rail 112. The cable is arranged by the cable clamp 45 on the follower bracket 4, thereby reducing the tension between the busbar and the cable connection point when the busbar moves, making the connection more stable and the wiring safer and more convenient.

[0045] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 12 As shown, the pressure supply module 3 includes a megohmmeter 31. The top of the megohmmeter 31 is provided with an L-line 32 (line end, connecting wire) and an E-line 33 (grounding end, connecting insulation layer, shell or ground). A generator is provided inside, and a voltage regulating motor 34 is provided outside. The generator shaft is connected to the drive shaft of the voltage regulating motor 34. The voltage regulating motor 34 is a variable frequency motor controlled by the control panel 13. After starting, it drives the generator to rotate and generate electricity, so that a potential difference is generated at the two ends of the L-line 32 and the E-line 33. The magnitude of the potential difference is adjusted by the speed of the voltage regulating motor 34.

[0046] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 12 Appendix Figure 13 As shown, the extended connection module 7 includes an L-end expansion dock 71 and an E-end expansion dock 72. The E-end expansion dock 72 is mounted on the platform 11 in front of the fixed support 21. An E-end interface 721 is provided on the front and connected to the E-line 33. Sand spot detection lines 722 and insulation detection lines 723 are respectively provided on both sides, and power switches 73 are provided corresponding to the sand spot detection lines 722 and insulation detection lines 723. The insulation detection line 723 is adapted to the wire clamp 45, and an E-end electrical clamp 725 is provided at the other end (the head of the E-end electrical clamp 725 extends with...). The other end of the sand spot detection line 722 is equipped with a detection connector 724; the L-end expansion dock 71 is located on the top of the E-end expansion dock 72, and the front side is equipped with an L-end interface 711 that is plugged into the L line 32. The top is connected to the L-end electric clamp 712 and the bus connector 713 (multiple bus connectors 713 are provided, and different specifications are provided. The L-end expansion dock 71 is equipped with a suitable resistor through the wire, so that the megohmmeter 31 can be used for a wider range of busbars), and a power switch 73 is provided for each wire.

[0047] In the above description, after the insulation detection wire 723 is arranged on the clamp 45 on one side of the flip rod 43, the E-end clamp 725 and the busbar clamp 44 of the follower bracket 4 are respectively clamped onto the busbar insulation layer (the busbar is too thick for the E-end clamp 725 to clamp, so the busbar clamp 44 can be used to clamp the metal piece of the E-end clamp 725 onto the busbar insulation layer for connection). The sliding support 22 drives the busbar to move after being driven by the moving module 25, and the E-end clamp 725 moves with the busbar through the sliding support 22 and is stably connected to the busbar insulation layer. At the same time, the L-end clamp 725 moves with the busbar through the sliding support 22. Connect busbar connector 713 to the end of the busbar (interface end or exposed part of the conductor), start the voltage regulating motor 34, and make the megohmmeter 31 generator rotate to generate electricity. A potential difference is generated at the two ends of L line 32 and E line 33. Because the resistance of the busbar insulation layer is large, it is difficult to generate current between the two ends of L line 32 and E line 33. The resistance of the busbar insulation layer is detected by the megohmmeter 31, and the resistance of the busbar insulation layer is displayed on the control panel 13. If current is generated between the two ends of L line 32 and E line 33, the busbar insulation layer fails and is broken down, and there is a problem with the insulation of the busbar insulation layer.

[0048] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 8 Appendix Figure 9 As shown, the sand spot detection module 5 includes a conveyor belt 51 and a positioning rod 52. The conveyor belt 51 is set on the top surface of the arrangement platform 113 and is parallel to the top surface of the arrangement platform 113. A corresponding motor is arranged in the arrangement platform 113. The positioning rod 52 is horizontally arranged in the left-right direction. One end is provided with a carbon brush 53 and the other end is provided with a downwardly inclined positioning handle 521. The positioning handle 521 is rotatably set in the positioning sleeve 511 of the conveyor belt 51. The platform 11 is provided with a second slide groove 114. A positioning slider 55 is slidably arranged back and forth in the second slide groove 114. A positioning upright 54 is slidably arranged up and down on the positioning slider 55. The top of the positioning upright 54 is movably sleeved on the positioning rod 52. One side of the carbon brush 53 is provided with brush bristles and the other side is provided with a detection interface 531, which is connected to the detection connector 724.

[0049] In the above description, the sand spot detection line 722 is connected to the carbon brush 53 through the detection connector 724 and the detection interface 531. The voltage regulating motor 34 is started, causing the megohmmeter 31 generator to rotate and generate electricity. A potential difference is generated at the two ends of the L line 32 and the E line 33. Then, the conveyor belt 51 is started, and the positioning rod 52, under the action of the positioning upright 54 and the positioning slider 55, maintains a lateral arrangement and moves with the conveyor belt 51, driving the carbon brush 53 to brush the busbar from back to front. After that, it moves diagonally upward away from the busbar and then returns to the rear side via the conveyor belt 51 to brush the busbar again. During the reciprocating brushing process, due to the high resistance of the busbar insulation layer, the busbar and the carbon brush 53 cannot... When a current is generated, the carbon brush 53 brushes the surface of the busbar normally. If the busbar insulation layer is damaged, forming sand spots or broken points, the carbon brush 53 brush bristles will directly contact the internal busbar, forming a current loop. When the current passes through the carbon brush 53 brush bristles, it will produce flashing sparks and a popping sound. The more sparks produced, the more sand spots there are in the busbar insulation layer, and the more serious the damage to the busbar insulation layer. During the test, the crank handle 246 can be rotated to make the hand crank module 24 control the busbar clamping structure 23 of the fixed support 21 to rotate, and drive the busbar to rotate slowly for several turns, thereby increasing the contact area between the carbon brush 53 brush bristles and the busbar insulation layer, making the test effect more comprehensive and accurate, and preventing the sand spots from being missed.

[0050] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 14 As shown, the grounding module 6 includes a grounding flat iron 61 disposed on the rear side of the test platform 1. The upper end of the grounding flat iron 61 is connected to the grounding wire 62 disposed inside the transparent cover 12. The grounding wire 62 is adapted to the wire clamp 45, and the other end is provided with a grounding electric clamp 63 (the head of the grounding electric clamp 63 is provided with a metal piece, which facilitates connection with a thicker busbar by means of the busbar clamp 44). The grounding wire 62 is arranged on the other side of the flip bar 43 through the wire clamp 45.

[0051] In the above description, the grounding clamp 63 and the busbar clamp 44 of the follower bracket 4 are respectively clamped on the rear end of the busbar (interface end or exposed conductor part), and connected to the front end of the busbar (interface end or exposed conductor part) through the L-end clamp 712 and the busbar connector 713. The voltage regulating motor 34 is started, causing the megohmmeter 31 generator to rotate and generate electricity. A specific high voltage potential difference is generated at both ends of the L line 32 and the E line 33, and it continues for a period of time. During the process, it is observed whether the busbar insulation layer is broken down and an arc discharge phenomenon occurs. If it occurs, it indicates that the busbar insulation layer is damaged and its high voltage resistance is insufficient. If it does not occur, it indicates that the insulation performance of the busbar insulation layer is good and it has a certain high voltage resistance.

[0052] During the above testing process, the busbar is photographed and recorded by camera 14, and the recorded content is played back through control panel 13 to confirm and record whether the arc discharge phenomenon has occurred.

[0053] In specific implementations of this invention, the contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0054] Working principle of the invention: The principles of the three detection methods for busbar insulation layers in this invention are as follows:

[0055] Insulation resistance testing: Insulators have a high resistance value. A megohmmeter is used to apply a high voltage DC current to both ends of the insulator to measure the insulation resistance value of the electrical equipment or line (unit: megohm / MΩ), thereby determining whether the insulation material is damp, aged or damaged.

[0056] Insulation layer sand spot detection: To test the uniformity of the conductor insulation layer, one end of the conductor is connected to carbon brush 53 via a megohmmeter. After applying high voltage DC current through the megohmmeter, carbon brush 53 is used to brush the conductor insulation layer, allowing the brush bristles to penetrate the sand holes, gaps, and breaks in the insulation layer and make direct contact with the internal conductor, forming a current loop. When the current passes through the brush bristles with a high carbon content, local heat is generated due to resistance, resulting in sparks and deflagration, which can be used to detect sand holes, gaps, and breaks.

[0057] Insulation withstand voltage test: The insulation performance of the conductor insulation layer is tested by applying a specific high voltage to both ends of the conductor. A test voltage (AC or DC) higher than the rated working voltage is applied to the busbar. Utilizing the dielectric properties of the insulation material, electrical breakdown will occur when the voltage exceeds its withstand limit, thereby exposing insulation defects (such as air gaps, cracks or moisture).

Claims

1. A busbar insulation layer detection device, characterized by, include: The testing platform (1) is provided with a platform (11), and a transparent cover (12) is provided above the platform (11). The front of the transparent cover (12) is open and is provided with a flip cover (121). The front of the testing platform (1) is provided with a control panel (13) and a pressure supply module (3), and the rear is provided with a grounding module (6). The platform (11) is provided with a busbar arrangement module (2) and a sand spot detection module (5). The pressure supply module (3) is connected to the busbar and the sand spot detection module (5) through the extension connection module (7); The busbar arrangement module (2) includes a fixed support (21) disposed on the front side of the platform (11) and a sliding support (22) slidably disposed on the platform (11). The sliding support (22) is driven by a moving module (25) disposed below the platform (11). The fixed support (21) and the sliding support (22) are respectively provided with busbar clamping structures (23). The busbar clamping structure (23) includes mounting collars (231) rotatably disposed on the front top of the fixed support (21) and the sliding support (22). The fixed support (21) is provided with a hand-cranked module (24), including a transmission bevel ring (241) rotatably disposed on the rear side of the fixed support (21) and connected and fixed to the mounting collar (231), a transmission bevel gear (242) meshing with the transmission bevel ring (241) is rotatably disposed on the platform (11), a crank handle (246) is rotatably disposed on one side of the platform (11), and the crank handle (246) shaft and the transmission bevel gear (242) shaft are connected by a gear set disposed below the platform (11); The sand spot detection module (5) includes a conveyor belt (51) and a positioning rod (52). A platform (113) is provided on one side of the platform (11), and the top surface of the platform (113) is inclined inward. The conveyor belt (51) is provided on the top surface of the platform (113). The positioning rod (52) is horizontally arranged, with a carbon brush (53) at one end and a downwardly inclined positioning handle (521) at the other end. The positioning handle (521) is rotatably arranged in the positioning sleeve (511) provided on the conveyor belt (51). A second slide groove (114) is provided on the platform (11). A positioning slider (55) is slidably arranged back and forth in the second slide groove (114). A positioning rod (54) is slidably arranged up and down on the positioning slider (55), and the top of the positioning rod (54) is movably sleeved on the positioning rod (52).

2. The busbar insulation layer detection device according to claim 1, characterized in that: The clamping bevel ring (232) and the clamping bevel gears (233) are rotationally arranged in the mounting ring (231), the clamping bevel gears (233) are arranged in the circumference of the clamping bevel ring (232) and are in mesh with the clamping bevel ring (232), the adjusting screw (234) is arranged on the rotating shaft, the clamping plates (236) are slidably arranged on the inner side of the mounting ring (231) corresponding to the clamping bevel gears (233), the threaded sleeve (235) is arranged on the clamping plate (236) corresponding to the adjusting screw (234), the knob (237) is rotationally arranged on the outer side of the mounting ring (231) and is connected with one of the clamping bevel gears (233).

3. The busbar insulation layer detection device according to claim 1, characterized in that: The pressure supply module (3) comprises a watch (31), the top of the watch (31) is provided with an L line (32) and an E line (33), the inside of the watch (31) is provided with a generator, the outside of the watch (31) is provided with a voltage regulating motor (34), and the rotating shaft of the generator is connected with the driving shaft of the voltage regulating motor (34).

4. The busbar insulation layer detection device according to claim 3, characterized in that: The expansion cable module (7) comprises an L end expansion dock (71) and an E end expansion dock (72), the E end expansion dock (72) is arranged on the table top (11) of the front side of the fixed support (21), the front side is provided with an E end interface (721) and is connected with the E line (33), the two sides are respectively provided with a sand point detection line (722) and an insulation detection line (723), and the power on switch (73) is arranged corresponding to the sand point detection line (722) and the insulation detection line (723), the other end of the insulation detection line (723) is provided with an E end electric clamp (725), and the other end of the sand point detection line (722) is provided with a detection connector (724).

5. The busbar insulation layer detection device according to claim 4, characterized in that: The L end expansion dock (71) is arranged on the top of the E end expansion dock (72), the front side is provided with an L end interface (711) matched with the L line (32), the top is connected with an L end electric clamp (712) and a bus connector (713) through wires, and the power on switch (73) is arranged corresponding to each wire.

6. The busbar insulation layer detection device according to claim 4, characterized in that: The detection interface (531) is arranged on the carbon brush (53) and is connected with the detection connector (724).

7. The busbar insulation layer detection device according to claim 4, characterized in that: The table top (11) is provided with a sliding base (41) sliding forward and backward, the sliding base (41) is provided with a vertical rod (42) sliding left and right, the vertical rod (42) is hingedly connected with a turning rod (43) at the top, the turning rod (43) is provided with a bus clamp (44) at the other end, and the wire clamp (45) is arranged corresponding to the insulation detection line (723) on the two sides.

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