A high-low voltage cable branch box with insulation repair structure

Abstract

The application relates to the technical field of power distribution equipment, in particular to a high-low voltage cable branch box with an insulation repairing structure, which comprises a box body, a main wiring element and a plurality of branch wiring elements are arranged in the box body, and wires with insulation layers are connected to the main wiring element and the branch wiring elements; an insulation detecting assembly and an insulation repairing assembly driven by a longitudinal moving assembly and a transverse moving assembly are arranged in the box body; and the longitudinal moving assembly, the transverse moving assembly, the insulation detecting assembly and the insulation repairing assembly are electrically connected with a control system. The longitudinal and transverse moving assemblies are cooperatively matched to drive the insulation detecting assembly and the repairing assembly to move in the box body, thereby replacing the traditional manual visual inspection and manual coating. The control system can automatically dispatch the repairing operation according to the detection result, realizes the change from passive maintenance to active prevention, and improves the operation safety and intelligent operation and maintenance level of the high-low voltage cable branch box.

Description

Technical Field

[0001] This invention relates to the field of power distribution equipment technology, and more specifically to a high- and low-voltage cable branch box with an insulation repair structure. Background Technology

[0002] High and low voltage cable distribution boxes are widely used at the end of power systems in urban power grids, residential communities, and industrial plants, primarily responsible for cable branching, switching, and distribution. They typically integrate numerous terminals, circuit breakers, and connecting wires, making them a crucial node for ensuring safe power distribution.

[0003] In existing technologies, the conductors inside the enclosure are usually protected by the factory-installed insulation layer. However, during long-term operation, the insulation layer is prone to aging, cracking, wear, and even peeling due to factors such as condensation caused by temperature changes inside the enclosure, high-temperature baking by electric arcs, and mechanical compression during installation. Once the insulation layer fails, the exposed metal conductors may cause phase-to-phase short circuits or discharges to ground, seriously threatening the safety of the power grid.

[0004] Currently, insulation maintenance inside branch boxes mainly relies on regular manual inspections. Maintenance personnel visually inspect the insulation layer and use portable instruments for sampling tests. However, this method has several drawbacks: First, it is labor-intensive, as the confined space inside the box makes manual operation inconvenient, and the high-voltage environment poses a risk of electric shock. Second, the inspection accuracy is low; manual visual inspection is insufficient to detect minute hidden cracks or internal damage, easily leaving safety hazards. Third, repairs are delayed and of inconsistent quality; repairs are usually only carried out reactively after a fault trips, and the manual application of insulating tape or materials is greatly affected by human factors, making it difficult to guarantee sealing and durability.

[0005] Therefore, how to achieve real-time monitoring and automated repair of the insulation status of conductors in high and low voltage cable branch boxes, and transform traditional passive maintenance into proactive prevention, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In order to overcome the problems of existing high and low voltage cable branch boxes that cannot automatically detect insulation status and rely on manual repair with low efficiency, this application provides a high and low voltage cable branch box with an insulation repair structure.

[0007] The high- and low-voltage cable branch box with an insulation repair structure provided in this application adopts the following technical solution: A high- and low-voltage cable branch box with an insulation repair structure includes a box body, a door rotatably connected to the front end of the box body, an insulating mounting plate fixedly installed inside the box body, a main wiring element and several branch wiring elements fixedly installed on the insulating mounting plate, and several insulated wires connected to the main wiring element and the branch wiring elements; a longitudinal moving component is installed inside the box body, a lateral moving component is installed on the longitudinal moving component, and an insulation detection component and an insulation repair component are installed on the lateral moving component. The insulation detection component is used to detect the insulation layer on the wires, and the insulation repair component is used to repair the insulation layer on the wires; the longitudinal moving component, the lateral moving component, the insulation detection component, and the insulation repair component are electrically connected to a control system.

[0008] By adopting the above technical solution, a fully automated conductor insulation inspection and repair system was constructed. Utilizing the coordinated operation of longitudinal and lateral moving components, the insulation detection and repair components are driven to move within the enclosure, replacing traditional manual visual inspection and manual coating. The control system can automatically schedule repair operations based on the inspection results, realizing a shift from passive maintenance to proactive prevention, and improving the operational safety and intelligent maintenance level of high and low voltage cable branch boxes.

[0009] Furthermore, the longitudinal movement component includes a first mounting bracket, which is fixedly installed inside the housing near its front end. A vertically arranged threaded rod is rotatably connected to the first mounting bracket along its length. A first drive motor is fixedly installed on the first mounting bracket. The first drive motor is electrically connected to the control system. The drive shaft of the first drive motor is coaxially fixedly connected to the threaded rod. A threaded sleeve is threadedly connected to the threaded rod, and the threaded sleeve is fixedly installed on the transverse movement component.

[0010] By adopting the above technical solution, a stable spiral lifting mechanism is constructed. The first drive motor drives the threaded rod to rotate, and the rotational motion is converted into linear motion through thread transmission, thereby precisely controlling the lifting height of the lateral moving component and the detection and repair equipment installed on it. This structure features good self-locking and high positioning accuracy, ensuring that the detection head and nozzle can be accurately aligned with the wires at different heights.

[0011] Furthermore, the lateral movement component includes a second mounting bracket, which is fixedly installed inside the housing on the other side near its front end. A vertically arranged splined shaft is slidably connected to the second mounting bracket along its length. A second drive motor is fixedly installed on the second mounting bracket and is electrically connected to the control system. The drive shaft of the second drive motor is coaxially fixedly connected to the splined shaft. A splined sleeve is slidably connected to the splined shaft and is rotatably installed on a transversely arranged crossbeam. A threaded sleeve is also fixedly installed on the crossbeam. A groove is formed inside the crossbeam. A driven pulley is rotatably connected to one end of the groove away from the splined sleeve. A driving pulley is fixedly fitted on the outer side of the splined sleeve. A toothed belt is drivingly connected between the driven pulley and the driving pulley. A slider is fixedly installed on the toothed belt and slidably connected in the groove. A mounting base is fixedly installed on the outer end of the slider. A mounting bracket arranged along the depth direction of the housing is fixedly installed on the mounting base. The insulation detection component and the insulation repair component are mounted side by side on the mounting bracket.

[0012] By adopting the above technical solution, precise lateral displacement of the detection and repair mechanism is achieved. The second drive motor drives the spline sleeve and the drive pulley to rotate via a spline shaft, which in turn drives the slider to slide within the crossbeam via a toothed belt. The spline shaft design allows the crossbeam to maintain a transmission connection throughout the lifting process, while the toothed belt drive ensures the smoothness and positional accuracy of the lateral movement, thus enabling the mounting bracket to cover the positions of all critical wires within the housing.

[0013] Furthermore, the insulation detection assembly includes an insulation resistance detector electrically connected to the control system. A first telescopic member is fixedly installed on the mounting bracket along the depth direction of the housing. A detection head is installed on the telescopic end of the first telescopic member facing the interior of the housing. The detection head and the wire are both connected to the detection circuit of the insulation resistance detector.

[0014] By adopting the above technical solution, the quantitative detection of conductor insulation resistance can be completed automatically. The first telescopic component is responsible for accurately pushing the detection head into contact with the conductor, forming a complete detection circuit. The insulation resistance tester, by applying a test voltage and collecting current, can sensitively identify potential problems such as insulation aging, damage, or moisture absorption, and feeds the data back to the control system in real time for judgment.

[0015] Furthermore, the insulation repair component includes a storage tank, which is fixedly installed inside the housing near its top. The storage tank stores repair fluid. An output pipe is fixedly and sealed to the storage tank near the bottom of the housing. An electrically controlled pump is installed on the output pipe and is electrically connected to the control system. The electrically controlled pump is connected to a connecting hose. A second telescopic member is fixedly installed on the mounting bracket along the depth direction of the housing. A spray pipe is installed on the telescopic end of the second telescopic member facing the interior of the housing. A spray hole is opened at one end of the spray pipe facing the interior of the housing. The connecting hose is sealed and connected to the spray pipe.

[0016] By adopting the above technical solution, an automated in-situ repair function is provided. When an insulation fault is detected, the second telescopic component drives the nozzle to approach the damaged area, and the electronically controlled pump starts to pump the repair fluid through the connecting hose to the nozzle for spraying. The repair fluid quickly solidifies in the air, forming a new, high-performance insulating protective layer, and the repair can be completed without manual disassembly of the enclosure and wiring.

[0017] Furthermore, an electric winding machine is fixedly installed inside the housing near its top. The electric winding machine is electrically connected to the control system, and the connecting hose is wound onto the electric winding machine.

[0018] By adopting the above technical solution, the problem of storing and preventing tangling of the connecting hose during movement is solved. The electric rewinder can adjust the amount of hose winding and unwinding in real time according to the position of the lateral moving component, always keeping the hose taut and free from interference, preventing poor fluid supply or detachment caused by hose dragging or bending, and ensuring the continuity and reliability of repair operations.

[0019] Furthermore, the end of the detection head facing the inside of the housing is provided with a first conical surface, and a detection ring is fitted on the outside of the wire. The detection ring is made of conductive material, and the inner side of the detection ring is slidably connected to the insulation layer on the outside of the wire. The outer side of the detection ring facing the outside of the housing is provided with a first conical hole that matches the first conical surface.

[0020] By adopting the above technical solution, the adaptability and accuracy of the detection are improved. The detection ring, as a conductive medium, is pre-fitted onto the conductor. The detection head, through the cooperation of the first conical surface and the first conical hole, can adaptively align with and tightly abut against the detection ring, without the need for precise alignment with the conductor's axis. This design allows the detection head to smoothly glide across the conductor during movement, while continuously and reliably scanning the insulation status of the entire line.

[0021] Furthermore, the nozzle has a second conical surface at one end facing the inside of the housing, and a repair ring is fitted on the outer side of each wire. The inner side of the repair ring has an annular groove, and a plurality of evenly distributed annular injection holes are formed on the circumferential surface of the inner side of the annular groove. The outer side of the repair ring facing the outside of the housing has a second conical hole that matches the second conical surface, and the inside of the repair ring has an annular channel connecting the second conical hole and the injection hole.

[0022] By adopting the above technical solution, a 360° surround repair of the conductor insulation layer without dead angles is achieved. After the nozzle connects with the repair ring through the second conical surface, the repair liquid enters the annular channel and is evenly distributed, finally being sprayed out simultaneously from the circumferentially distributed spray holes, completely covering the damaged area of ​​the conductor. Compared with single-sided spraying, this method forms an insulation layer with uniform thickness and better sealing, completely eliminating local insulation weaknesses.

[0023] Furthermore, the repair ring is made of ferromagnetic material, and a permanent magnet block is fitted onto the nozzle.

[0024] By adopting the above technical solution, magnetic adsorption was used to achieve rapid and stable docking between the repair ring and the nozzle. The magnetic field generated by the permanent magnet can firmly attract the ferromagnetic repair ring to the end of the nozzle, which not only simplifies the positioning process, but also effectively suppresses the vibration caused by recoil force during high-pressure spraying, prevents nozzle displacement and spraying deviation, and ensures repair quality.

[0025] Furthermore, an external fixing bracket is fixedly connected to the outer rear end of the box, and a wire through hole is provided on the side wall of the box.

[0026] By adopting the above technical solution, the external fixing bracket facilitates the secure mounting of the box on a pre-set location such as a utility pole or wall, and the cable entry and exit holes facilitate the introduction and exit of cables. This optimizes the ease of installation for the branch box.

[0027] Beneficial effects achieved: This application utilizes the coordinated operation of longitudinal and lateral moving components to drive insulation detection and repair components within a housing, constructing a self-diagnostic and self-repairing intelligent operation and maintenance system. This changes the traditional passive mode that relies on periodic manual inspections. The system employs contact resistance detection technology with a detection ring to accurately identify aging and damage risks in the conductor insulation layer. Once a fault is diagnosed, the system immediately dispatches the repair component, using magnetic docking technology to lock the repair ring fitted onto the conductor. Utilizing its internal annular channel and circumferential spray holes, it performs a surrounding spraying of the damaged area, resulting in a uniform and dense repair quality superior to manual brushing. Simultaneously, the electric winding machine dynamically manages the tension of the liquid supply hose, and the permanent magnet blocks stabilize the system against spraying backlash, ensuring the stability and durability of the entire mechanism within the compact housing. This significantly improves power grid operation safety and reduces manual maintenance costs. Furthermore, its universal mounting design demonstrates high engineering practicality and promising prospects for widespread application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application.

[0029] Figure 2 This is a structural exploded view of one embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the internal structure of one embodiment of this application.

[0031] Figure 4 This is an exploded view of the structure of the longitudinal moving component, the lateral moving component, the insulation detection component, and the insulation repair component in one embodiment of this application.

[0032] Figure 5 This is a schematic diagram of the installation structure of the repair ring in one embodiment of this application.

[0033] Figure 6 This is a schematic diagram of the installation structure of the detection ring in one embodiment of this application.

[0034] Explanation of reference numerals in the attached drawings: 100, enclosure; 101, enclosure door; 102, insulating mounting plate; 103, main wiring element; 104, branch wiring element; 105, wire; 106, external fixing bracket; 107, wire hole; 200, longitudinal movement assembly; 201, first mounting bracket; 202, threaded rod; 203, first drive motor; 204, threaded sleeve; 300, lateral movement assembly; 301, second mounting bracket; 302, splined shaft; 303, second drive motor; 304, splined sleeve; 305, crossbeam; 306, slide groove; 307, driven pulley; 308, driving pulley; 309, toothed belt. 310, slider; 311, mounting base; 312, mounting bracket; 400, insulation detection assembly; 401, first telescopic component; 402, detection head; 403, first conical surface; 404, detection ring; 405, first conical hole; 500, insulation repair assembly; 501, storage tank; 502, output pipe; 503, electric pump; 504, connecting hose; 505, second telescopic component; 506, nozzle; 507, nozzle; 508, second conical surface; 509, repair ring; 510, annular groove; 511, spray hole; 512, second conical hole; 513, annular channel; 514, permanent magnet block; 600, electric winding machine. Detailed Implementation

[0035] The following combination Figures 1-6 This application will be described in further detail.

[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] This application discloses a high- and low-voltage cable branch box with an insulation repair structure.

[0039] Please refer to the above as well. Figures 1 to 6 In one embodiment of this application, a high- and low-voltage cable branch box with an insulation repair structure includes a box body 100. A door 101 is hinged to the front end of the box body 100 for easy opening and maintenance. An insulating mounting plate 102 is bolted to the rear wall inside the box body 100. This insulating mounting plate 102 is made of high-strength epoxy resin board and has good insulation performance. Main wiring elements 103 (e.g., incoming circuit breakers) and several branch wiring elements 104 (e.g., outgoing fuses) are respectively fixedly mounted on the insulating mounting plate 102 via insulators. Several conductors 105 with polyvinyl chloride (PVC) insulation are connected to the main wiring elements 103 and each branch wiring element 104. The conductors 105 include incoming lines connected to the main wiring elements 103, outgoing lines connected to each branch wiring element 104, and branch lines connecting the main wiring elements 103 and each branch wiring element 104.

[0040] To achieve automated operation and maintenance, a longitudinal moving component 200 is installed at the top front of the inner cavity of the enclosure 100. A lateral moving component 300 is fixedly installed at the moving end of the longitudinal moving component 200. An insulation detection component 400 and an insulation repair component 500 are installed at the moving end of the lateral moving component 300, arranged side-by-side in a vertical direction. The insulation detection component 400 scans the surface of the conductor 105 to check for the integrity of the insulation layer; the insulation repair component 500 sprays insulation repair fluid at any detected damage. The longitudinal moving component 200, the lateral moving component 300, the insulation detection component 400, and the insulation repair component 500 are all electrically connected to the built-in control system via control cables.

[0041] During operation, the control system periodically initiates a self-test program, automatically controlling the longitudinal movement component 200 and the lateral movement component 300 to work together, driving the insulation detection component 400 to move to the position of each conductor 105 for detection. If the detected insulation resistance is lower than the set threshold, the system records the fault coordinates and dispatches the insulation repair component 500 to move to that position to automatically spray and repair the damaged area.

[0042] In one specific embodiment of this application, the control system includes an integrated controller or central processing unit, such as a PLC, a microprocessor, etc.

[0043] Please refer to the above as well. Figures 1 to 6In one specific embodiment of this application, the longitudinal moving component 200 includes a first mounting bracket 201. The first mounting bracket 201 is fixed to the left side of the inner wall of the housing 100 by screws. A vertically arranged threaded rod 202 is rotatably connected to the first mounting bracket 201 via a bearing seat. A first drive motor 203 is fixedly mounted on the top of the first mounting bracket 201, and the drive shaft of the first drive motor 203 is coaxially fixedly connected to the lower end of the threaded rod 202 via a coupling. A threaded sleeve 204 is threadedly connected to the threaded rod 202, and the threaded sleeve 204 is rigidly connected to the transverse moving component 300, thereby converting the rotational motion into vertical linear motion and realizing the lifting function.

[0044] During operation, when an upward movement is required, the control system sends a positive pulse signal to the first drive motor 203. The drive shaft of the first drive motor 203 drives the threaded rod 202 to rotate forward via a coupling. Since the threaded sleeve 204 is rigidly connected to the bracket of the lateral moving assembly 300, the threaded sleeve 204 does not rotate with the threaded rod 202. Therefore, according to the principle of screw transmission, the threaded sleeve 204 converts the rotational motion into linear motion under the action of the threaded pair, moving upward along the axial direction of the threaded rod 202, thereby driving the entire lateral moving assembly 300 to rise smoothly in the vertical direction. Conversely, when a downward movement is required, the control system controls the first drive motor 203 to drive the threaded rod 202 in reverse, and the threaded sleeve 204 moves downward along the threaded rod 202, driving the lateral moving assembly 300 to fall back. Throughout the entire operation, the first mounting bracket 201, as the base, ensures the verticality of the threaded rod 202, and the bearing seat effectively bears the radial and axial forces, ensuring the stability and high-precision positioning of the lifting process.

[0045] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, the lateral movement assembly 300 includes a second mounting bracket 301, which is fixed to the right side of the inner wall of the housing 100 by screws. A vertically arranged spline shaft 302 is slidably connected to the second mounting bracket 301 in the horizontal direction. The spline shaft 302 can slide axially within the second mounting bracket 301 but cannot rotate. A second drive motor 303 is fixedly mounted at the bottom of the second mounting bracket 301. The drive shaft of the second drive motor 303 is coaxially fixedly connected to the lower end of the spline shaft 302.

[0046] A splined sleeve 304 is slidably fitted onto the splined shaft 302, and the splined sleeve 304 is rotatably mounted on the transversely arranged crossbeam 305 via a deep groove ball bearing. The aforementioned threaded sleeve 204 is also fixedly mounted on the left end of the crossbeam 305. A groove 306 along its length is formed inside the crossbeam 305, and one end of the groove 306 is rotatably connected to a driven pulley 307 via a bearing. A driving pulley 308 is fixedly fitted onto the outer side of the splined sleeve 304, and the two are connected by a toothed belt 309. A slider 310 is fixedly mounted on the toothed belt 309 by a clamp, and the slider 310 slides in engagement with the groove 306. A mounting base 311 is welded to the outer end of the slider 310, and a mounting bracket 312 extending along the depth direction (i.e., the front-to-back direction) of the housing 100 is fixed on the mounting base 311. The insulation detection assembly 400 and the insulation repair assembly 500 are mounted side by side on the mounting bracket 312.

[0047] During operation, when a rightward movement is required, the control system sends a positive pulse signal to the second drive motor 303. The drive shaft of the second drive motor 303 drives the spline shaft 302, which is coaxially fixed to it, to rotate positively around its own axis. Since the spline shaft 302 and the spline sleeve 304, which is slidably fitted on it, transmit torque through spline teeth, the rotational motion of the spline shaft 302 is smoothly transmitted to the spline sleeve 304, causing the spline sleeve 304 to rotate synchronously in the positive direction. The positive rotation of the spline sleeve 304 further drives the drive pulley 308, which is fixedly fitted on its outer side, to rotate. The drive pulley 308 drives the slider 310, which is fixedly mounted on the toothed belt 309, to slide to the right along the groove 306 inside the crossbeam 305 through the toothed belt 309 that meshes with it. This, in turn, drives the mounting bracket 312 to move smoothly to the right to the target position through the mounting base 311.

[0048] When a leftward movement is required, the control system sends a reverse pulse signal to the second drive motor 303. The drive shaft of the second drive motor 303 drives the spline shaft 302 to rotate in the opposite direction around its own axis, which in turn drives the spline sleeve 304 and the drive pulley 308 fixedly mounted on its outer side to rotate synchronously in the opposite direction through spline tooth engagement. The reverse rotation of the drive pulley 308 is transmitted through the engagement of the toothed belt 309, driving the slider 310 fixedly mounted on the toothed belt 309 to slide smoothly to the left along the slide groove 306 inside the crossbeam 305, thereby driving the mounting bracket 312 to move precisely to the target position on the left through the mounting base 311.

[0049] The cooperation between the longitudinal moving component 200 and the transverse moving component 300 allows the mounting frame 312 to move up and down with the crossbeam 305, move left and right with the slider 310, and move according to a set route. In this way, the mounting frame 312 can drive the insulation detection component 400 and the insulation repair component 500 to move in a two-dimensional plane according to the arrangement route of the conductor 105, thereby realizing the inspection and repair of the conductor 105.

[0050] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, both the first drive motor 203 and the second drive motor 303 are configured as stepper motors.

[0051] During operation, the control system controls the coordinated motion of two degrees of freedom by sending high-speed pulse sequences to the stepper motor driver. Because the stepper motor has excellent angular displacement rigidity, the rotation angle of its drive shaft is strictly proportional to the number of received pulses. When spatial path planning of the mounting frame 312 is required, the control system only needs to send a coordinated pulse sequence, calculated using an interpolation algorithm, to the drivers of the first drive motor 203 and the second drive motor 303 to control the mounting frame 312 to move along a predetermined trajectory in the two-dimensional plane formed by the longitudinal and transverse directions.

[0052] It is understood that in other specific embodiments of this application, the first drive motor 203 and the second drive motor 303 may also be configured as servo motors.

[0053] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, the insulation testing assembly 400 includes an insulation resistance tester. A first telescopic member 401, arranged along the depth direction, is fixedly mounted on the mounting bracket 312. A testing head 402 is mounted on the end of the telescopic rod of the first telescopic member 401 facing the inside of the housing. The testing head 402 is connected to the testing circuit of the insulation resistance tester via a wire. At the same time, the wire 105 to be tested is also connected to the testing circuit to form a loop. The insulation layer is determined to be damaged by the change in resistance of the testing loop.

[0054] During operation, when the mounting bracket 312 moves precisely to a preset position directly above the conductor 105 under the coordinated action of the longitudinal moving component 200 and the transverse moving component 300, the control system first controls the first telescopic component 401 to extend. The telescopic rod of the first telescopic component 401 drives the detection head 402 at its end to move smoothly forward until the detection head 402 comes into close contact with the test point of the conductor 105. At this point, the conductor 105 is connected to the detection circuit preset by the insulation resistance tester.

[0055] Subsequently, the insulation resistance tester applies a constant DC high-voltage test signal to the detection circuit and collects the current changes in the circuit in real time to calculate the insulation resistance value. The control system compares the measured resistance value with the safety standard threshold pre-stored in the system: if the measured resistance value is greater than or equal to the safety threshold, the insulation layer of conductor 105 is determined to be intact; if the measured resistance value is less than the safety threshold, the insulation layer is determined to be damaged or aged and at risk of leakage.

[0056] After the test is completed, the control system controls the first telescopic component 401 to retract by de-energizing, causing the test head 402 to disengage from the conductor 105. Subsequently, the longitudinal moving component 200 and the lateral moving component 300 work together again to move the mounting frame 312 to the next test position. This cycle is repeated to achieve efficient and automated point-by-point insulation scanning test of the entire section or key nodes of the conductor 105 under test.

[0057] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, the insulation repair component 500 includes a storage tank 501, which is fixedly installed inside the housing 100 near its top. The storage tank 501 stores a repair fluid, such as room temperature vulcanizing silicone rubber insulating varnish. An output pipe 502 is fixedly and sealed to the storage tank 501 near the bottom of the housing 100. An electrically controlled pump 503, such as a micro diaphragm pump, is installed on the output pipe 502. The electrically controlled pump 503 is electrically connected to a control system, and a connecting hose 504 is connected to the outlet of the electrically controlled pump 503. A second telescopic member 505, which is arranged along the depth direction of the housing 100, is fixedly installed on the mounting bracket 312. A nozzle 506 is installed on the telescopic end of the second telescopic member 505 facing the inside of the housing 100. A spray hole 507 is opened at one end of the nozzle 506 facing the inside of the housing 100. The end of the connecting hose 504 is sealed and connected to the internal flow channel of the nozzle 506.

[0058] During operation, when the control system determines, through the preceding insulation detection component 400, that the insulation resistance value of a certain conductor 105 is lower than the safety threshold, the system immediately records the coordinates of the fault point. Subsequently, the control system drives the longitudinal movement component 200 and the lateral movement component 300 in multi-axis linkage to precisely push the mounting bracket 312 directly in front of the fault point, preparing the space for the repair operation. After the mounting bracket 312 is in place, the control system immediately sends an extension command to the second telescopic component 505. The telescopic rod of the second telescopic component 505 drives the nozzle 506 at its end to move forward quickly and smoothly until the spray hole 507 at the end of the nozzle 506 approaches the damaged area of ​​the conductor 105 to be tested. This is typically controlled at the optimal atomization spraying distance of a few millimeters from the conductor surface, ensuring precise adhesion of the repair fluid while avoiding scratching the conductor.

[0059] At the same moment the nozzle 506 is in place, the control system sends a start signal to the electronically controlled pump 503. The electronically controlled pump 503 starts working, drawing out the repair fluid from the bottom outlet of the storage tank 501. The repair fluid flows sequentially through the output pipe 502, the electronically controlled pump 503, and the connecting hose 504, finally reaching the inner flow channel of the nozzle 506, and is evenly sprayed or dripped from the nozzle 507, tightly covering the damaged and exposed part of the wire 105. By precisely controlling the start and stop time or speed of the electronically controlled pump 503, the control system can achieve quantitative dispensing of the repair fluid, effectively preventing waste or leakage of adhesive and contamination of the surrounding good product area.

[0060] When the spraying time reaches the preset value, ensuring that the damaged area is completely covered, the control system first stops the electronic pump 503 to cut off the liquid flow, and then controls the second telescopic component 505 to retract, driving the spray nozzle 506 to return to its initial high position. At this time, the room temperature vulcanizing silicone rubber insulating varnish adhering to the damaged area of ​​the conductor 105 comes into contact with the air and begins to undergo a rapid vulcanization cross-linking reaction, curing in a short time to form a protective film with excellent insulation properties, waterproof and moisture-proof properties, and elasticity, completing the in-situ repair of the conductor insulation layer.

[0061] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, both the first telescopic member 401 and the second telescopic member 505 are configured as electric push rods.

[0062] During operation, the electric actuator, with its built-in high-precision ball screw or trapezoidal screw transmission mechanism, converts the rotary motion of the servo or stepper motor into a relatively smooth, jitter-free linear motion. In the insulation detection stage, the first electric actuator receives a micro-motion command from the control system and extends at a low speed, driving the detection head 402 to contact the test lead 105. At this time, the electric actuator can not only precisely control the end contact force by adjusting the output current to avoid puncturing the insulation layer due to excessive impact force, but also utilize its excellent self-locking characteristics to maintain an absolutely fixed position when the detection head 402 is stationary, ensuring that the signal collected by the insulation resistance detector is stable and drift-free. In the insulation repair stage, the electric actuator exhibits excellent repeatability, driving the nozzle 506 to precisely descend to the same distance from the repair ring 509 each time, ensuring consistent spraying quality. Simultaneously, under the high-pressure environment of the electric pump 503, the rigid structure of the electric actuator effectively suppresses vibration caused by recoil force, preventing splashing of the repair fluid.

[0063] It is understood that, in one specific embodiment of this application, the first telescopic member 401 and the second telescopic member 505 can also be configured as pneumatic telescopic cylinders, hydraulic cylinders, etc., to adapt to different industrial scenario requirements. For example, when configured as a pneumatic telescopic cylinder, it uses compressed air as power, has a faster response capability, and can shorten the cycle time of a single inspection and repair operation, making it particularly suitable for high-volume, high-throughput assembly line operation environments; while when configured as a hydraulic cylinder, due to the incompressible physical properties of hydraulic oil, it can output a larger thrust and has better load rigidity, which helps to ensure the reliability of the operation.

[0064] Please refer to the above as well. Figures 1 to 6In one specific embodiment of this application, an electric winding machine 600 is also fixedly installed at the top inside the housing 100, and the electric winding machine 600 is electrically connected to the control system. The middle section of the connecting hose 504 is neatly wound onto the drum of the electric winding machine 600, and the control system adjusts the winding amount in real time according to the position of the mounting bracket 312 to keep the connecting hose 504 taut and with appropriate slack.

[0065] During operation, as the mounting frame 312 moves within a two-dimensional plane, the connecting hose 504, which is wound on the electric winding machine 600, undergoes an alternating process of unwinding and winding.

[0066] Specifically, when the mounting frame 312 moves away from the electric winding machine 600, the connecting hose 504 is gradually pulled out, and the drum of the electric winding machine 600 is unwound synchronously; when the mounting frame 312 moves closer to the electric winding machine 600, the hose tends to loosen, and the electric winding machine 600 actively winds it up, rewinding the excess hose back onto the drum.

[0067] During dynamic displacement, the control system maintains closed-loop communication with the drive motors of the longitudinal moving component 200 and the lateral moving component 300. Based on the real-time coordinate position of the mounting bracket 312, the control system dynamically adjusts the winding torque or speed of the electric winding machine 600 using a preset algorithm. This dynamic tension adjustment mechanism not only ensures unobstructed flow of the repair fluid within the connecting hose 504, preventing fluid supply interruptions due to hose bends or kinks, but also significantly extends the hose's service life, ensuring a stable and reliable continuous fluid supply to the entire insulation repair component 500 during complex multi-dimensional spatial movements.

[0068] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, a first conical surface 403 is provided at one end of the detection head 402 facing the inside of the housing 100. A detection ring 404 is pre-movably fitted on the outside of the wire 105. The detection ring 404 is made of a conductive material, such as a copper alloy. The inner surface of the detection ring 404 is slidably connected to the insulation layer on the outside of the wire 105. A first conical hole 405 matching the first conical surface 403 is provided on the outer side of the detection ring 404 facing the outside of the housing 100.

[0069] During operation, the control system first controls the longitudinal moving component 200 and the lateral moving component 300 to move the detection head 402 on the mounting bracket 312 to the front of the detection ring 404 pre-fitted on the corresponding conductor 105. Then, it drives the first telescopic component 401 to extend, and under the push of the first telescopic component 401, the detection head 402 moves steadily forward. The first conical surface 403 at the end of the detection head 402 smoothly cuts into the first conical hole 405 on the outside of the detection ring 404 until the first conical surface 403 fits into the first conical hole 405. At this time, the detection head 402 and the detection ring 404 form reliable physical contact and electrical conduction, while the detection ring 404 is tightly fitted with the insulation layer of the conductor 105. If the insulation layer is damaged, it will directly conduct to the internal conductor. The insulation resistance tester applies a high-voltage test signal through the detection head 402, and the current flows into the conductor 105 through the detection ring 404 to form a complete circuit. The control system then coordinates the longitudinal movement component 200 and the lateral movement component 300 to move the detection head 402 and the detection ring 404 along the arrangement path of the conductor 105. During the movement, the control system can accurately determine the insulation condition of the conductor at that point by monitoring sudden changes in the loop resistance.

[0070] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, a second conical surface 508 is provided at one end of the nozzle 506 facing the inside of the housing 100, and a repair ring 509 is fitted on the outside of the wire 105. An annular groove 510 is provided on the inner side of the repair ring 509, and a plurality of annularly distributed spray holes 511 are provided on the circumferential surface of the inner side of the annular groove 510. A second conical hole 512 matching the second conical surface 508 is provided on the outer side of the repair ring 509 facing the outside of the housing 100, and an annular channel 513 connecting the second conical hole 512 and the spray hole 511 is provided inside the repair ring 509.

[0071] During operation, when the control system confirms through preliminary detection that the insulation layer of the conductor 105 is damaged, the control system first controls the longitudinal movement component 200 and the lateral movement component 300 to precisely position the nozzle 506 on the mounting bracket 312 directly in front of the repair ring 509 on the corresponding conductor 105. Then, it controls the second telescopic component 505 to extend, so that the second conical surface 508 first contacts and cuts into the corresponding second conical hole 512 on the outer side of the repair ring 509. The control system then controls the longitudinal movement component 200 and the lateral movement component 300 to move the nozzle 506 and the repair ring 509 together to the damaged position on the conductor 105. At this time, it controls the second telescopic component 505 to continue extending, so that the end face of the nozzle 506 forms a sealed contact with the inner bottom end of the repair ring 509. The control system then controls the start of the electronic pump 503, and the high-pressure repair fluid will flow into the inner cavity of the nozzle 506 along the connecting hose 504 and then be injected into the annular channel 513 inside the repair ring 509. Because the annular channel 513 is a closed annular cavity, the repair fluid quickly establishes a uniform hydraulic distribution within it. Subsequently, the repair fluid is simultaneously and at the same pressure sprayed at high speed from multiple sets of spray holes 511 evenly distributed in a ring on the inner circumference of the annular groove 510 onto the damaged insulation layer of the conductor 105, forming a repair fluid curtain around the conductor in a short time. After the spraying operation is completed, the electronically controlled pump 503 immediately stops flowing, and the control system then controls the longitudinal moving component 200 and the lateral moving component 300 to move the nozzle 506 and the repair ring 509 together to the initial predetermined position on the conductor 105, and then controls the second telescopic component 505 to drive the nozzle 506 to retract backward. The nozzle 506 separates from the second conical hole 512. At this time, the repair fluid that has been evenly covered at the damaged area of ​​the conductor 105 comes into contact with the air and begins to vulcanize and solidify, forming a new insulating protective layer.

[0072] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, the repair ring 509 is made of a ferromagnetic material, such as low-carbon steel. A neodymium iron boron permanent magnet 514 is fitted onto the head of the nozzle 506.

[0073] During operation, as the nozzle 506, carrying the permanent magnet 514 at its head, gradually approaches the repair ring 509 pre-mounted on the wire 105, the magnetic field of the permanent magnet penetrates the air gap between them, exerting a magnetic attraction. At this time, guided by the wedge-shaped mechanical shape of the second conical hole 512 on the outer side of the repair ring 509 and the second conical surface 508 of the nozzle, and with the continued extension of the second telescopic member 505, the distance between the permanent magnet 514 and the repair ring 509 further decreases, and the magnetic attraction further increases, thus attracting the repair ring 509 to the head end face of the nozzle 506. Furthermore, when the electronically controlled pump 503 pumps the high-pressure repair fluid into the nozzle 506, the constant magnetic attraction also stabilizes the nozzle assembly, effectively suppressing vibrations caused by liquid backflow.

[0074] Please refer to the above as well. Figures 1 to 6 In one specific embodiment of this application, an external fixing bracket 106 is welded to the outer rear end of the box 100 for mounting the entire branch box on a utility pole or wall. Several wiring holes 107 are provided on both side walls of the box 100 for introducing and exiting high and low voltage cables. The wiring holes 107 are filled with fireproof putty to seal and prevent dust.

[0075] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high- and low-voltage cable branch box with an insulation repair structure, characterized in that: The enclosure includes a housing (100), with a door (101) rotatably connected to the front end of the housing (100). An insulating mounting plate (102) is fixedly installed inside the housing (100). A main wiring element (103) and several branch wiring elements (104) are fixedly installed on the insulating mounting plate (102). Several insulated wires (105) are connected to the main wiring element (103) and the branch wiring elements (104). A longitudinal moving assembly (200) is installed inside the housing (100). A lateral movement component (300) is installed on the conductor (105), and an insulation detection component (400) and an insulation repair component (500) are installed on the lateral movement component (300). The insulation detection component (400) is used to detect the insulation layer on the conductor (105), and the insulation repair component (500) is used to repair the insulation layer on the conductor (105). The longitudinal movement component (200), the lateral movement component (300), the insulation detection component (400), and the insulation repair component (500) are electrically connected to a control system.

2. A high- and low-voltage cable branch box with an insulation repair structure according to claim 1, characterized in that: The longitudinal moving component (200) includes a first mounting bracket (201), which is fixedly installed inside the housing (100) near its front end. A vertically arranged threaded rod (202) is rotatably connected to the first mounting bracket (201) along its length direction. A first drive motor (203) is fixedly installed on the first mounting bracket (201). The first drive motor (203) is electrically connected to the control system. The drive shaft of the first drive motor (203) is coaxially fixedly connected to the threaded rod (202). A threaded sleeve (204) is threadedly connected to the threaded rod (202). The threaded sleeve (204) is fixedly installed on the transverse moving component (300).

3. A high- and low-voltage cable branch box with an insulation repair structure according to claim 2, characterized in that: The lateral movement assembly (300) includes a second mounting bracket (301), which is fixedly mounted inside the housing (100) on the other side near its front end. A vertically arranged splined shaft (302) is slidably connected to the second mounting bracket (301) along its length. A second drive motor (303) is fixedly mounted on the second mounting bracket (301). The second drive motor (303) is electrically connected to the control system. The drive shaft of the second drive motor (303) is coaxially fixedly connected to the splined shaft (302). A splined sleeve (304) is slidably connected to the splined shaft (302). The splined sleeve (304) is rotatably mounted on a horizontally arranged crossbeam (305). A threaded sleeve (204) is also fixedly mounted on the crossbeam (305). 05) An internal groove (306) is provided. A driven pulley (307) is rotatably connected to one end of the groove (306) away from the spline sleeve (304). A driving pulley (308) is fixedly fitted on the outer side of the spline sleeve (304). A toothed belt (309) is connected between the driven pulley (307) and the driving pulley (308). A slider (310) is fixedly installed on the toothed belt (309). The slider (310) is slidably connected in the groove (306). A mounting base (311) is fixedly installed on the outer end of the slider (310). A mounting bracket (312) is fixedly installed on the mounting base (311) along the depth direction of the housing (100). The insulation detection component (400) and the insulation repair component (500) are mounted side by side on the mounting bracket (312).

4. A high- and low-voltage cable branch box with an insulation repair structure according to claim 3, characterized in that: The insulation detection assembly (400) includes an insulation resistance detector electrically connected to the control system. A first telescopic member (401) is fixedly installed on the mounting bracket (312) along the depth direction of the housing (100). A detection head (402) is installed on the telescopic end of the first telescopic member (401) facing the inside of the housing (100). The detection head (402) and the wire (105) are both connected to the detection circuit of the insulation resistance detector.

5. A high- and low-voltage cable branch box with an insulation repair structure according to claim 3, characterized in that: The insulation repair component (500) includes a storage tank (501), which is fixedly installed inside the housing (100) near its top. The storage tank (501) stores repair fluid. An output pipe (502) is fixedly and sealed to the storage tank (501) near the bottom of the housing (100). An electrically controlled pump (503) is installed on the output pipe (502) and is electrically connected to the control system. The electric pump (503) is connected to a connecting hose (504); a second telescopic member (505) is fixedly installed on the mounting bracket (312) along the depth direction of the housing (100), and a nozzle (506) is installed on the telescopic end of the second telescopic member (505) facing the inside of the housing (100), and a nozzle hole (507) is opened at one end of the nozzle (506) facing the inside of the housing (100), and the connecting hose (504) is sealed and connected to the nozzle (506).

6. A high- and low-voltage cable branch box with an insulation repair structure according to claim 5, characterized in that: An electric winding machine (600) is fixedly installed inside the housing (100) near its top. The electric winding machine (600) is electrically connected to the control system. The connecting hose (504) is wound onto the electric winding machine (600).

7. A high- and low-voltage cable branch box with an insulation repair structure according to claim 4, characterized in that: The detection head (402) has a first conical surface (403) at one end facing the inside of the housing (100). A detection ring (404) is fitted on the outside of the wire (105). The detection ring (404) is made of conductive material. The inner side of the detection ring (404) is slidably connected to the insulating layer on the outside of the wire (105). A first conical hole (405) matching the first conical surface (403) is provided on the outer side of the detection ring (404) facing the outside of the housing (100).

8. A high- and low-voltage cable branch box with an insulation repair structure according to claim 5, characterized in that: The nozzle (506) has a second conical surface (508) at one end facing the inside of the housing (100). Repair rings (509) are fitted on the outer side of the wire (105). The inner side of the repair ring (509) has an annular groove (510). Several annularly distributed injection holes (511) are opened on the circumferential surface of the inner side of the annular groove (510). The outer side of the repair ring (509) facing the outside of the housing (100) has a second conical hole (512) that matches the second conical surface (508). The inside of the repair ring (509) has an annular channel (513) that connects the second conical hole (512) and the injection hole (511).

9. A high- and low-voltage cable branch box with an insulation repair structure according to claim 8, characterized in that: The repair ring (509) is made of ferromagnetic material, and a permanent magnet block (514) is fitted on the nozzle (506).

10. A high- and low-voltage cable branch box with an insulation repair structure according to any one of claims 1-9, characterized in that: An external fixing bracket (106) is fixedly connected to the outer rear end of the box (100), and a wire hole (107) is opened on the side wall of the box (100).

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