Insulation defect inspection and positioning device for distribution network overhead line

Abstract

The application discloses a kind of distribution network overhead line insulation defect inspection positioning device, comprising: unmanned aerial vehicle main body, unmanned aerial vehicle main body bottom fixedly connected with support base plate, the bottom of support base plate is provided with the fixed mechanism for clamping wire and the connecting mechanism for adsorbing fixed wire;Support base plate is provided with inspection mechanism, and inspection mechanism includes camera, detection host, pulse injection device and multiple scanning emission ports, camera, pulse injection device and scanning emission port are electrically connected with detection host, pulse injection device includes first pulse generation circuit and first receiving circuit, scanning emission port includes second pulse generation circuit and second receiving circuit, first pulse generation circuit is electrically connected with second receiving circuit, and second pulse generation circuit is electrically connected with first receiving circuit.The utility model can improve the efficiency and safety of distribution network overhead line insulation defect inspection, reduce operation and maintenance cost and accident rate.

Description

Technical Field

[0001] This application relates to the field of overhead line inspection technology, and in particular to a device for locating insulation defects in distribution network overhead lines. Background Technology

[0002] In the power supply system, the distribution network is a crucial link connecting the power grid and power consumers. Due to its extensive distribution across urban and rural areas, the sheer number of devices, the diverse types and models of equipment, the mixed operation of old and new equipment, and the inconsistent quality of equipment, maintenance work faces immense pressure. Currently, my country's distribution network structure is still dominated by overhead lines, with numerous distribution transformers, distribution switches, and other equipment installed along these lines, which are exposed to the outdoor environment for extended periods. Significant differences in power grid construction levels across different regions lead to uneven distribution and maintenance resource allocation. Coupled with factors such as climate, ambient temperature and humidity, and air pollution, power outages caused by hidden defects in distribution lines occur frequently. Statistics show that insulation faults account for a very high percentage of faults in overhead distribution lines and along their equipment. These insulation faults are caused by both obvious defects and less obvious hidden defects, typically requiring the collection of partial discharge signals emitted by the defects to pinpoint their location.

[0003] However, given the widespread distribution and numerous branches of power distribution lines, traditional methods of manually deploying sensors along the lines or conducting foot patrols with handheld mobile devices are extremely inefficient. Existing manpower can only cover a very small percentage of the lines, resulting in numerous hidden defects being overlooked, leading to a persistently high failure rate and failing to meet the demands of efficient operation and maintenance. Furthermore, some existing detection devices rely on manual operation of insulated rods for installation, which is not only inefficient but also poses safety risks such as falls from heights and electric shocks to workers. Therefore, this utility model proposes a device for inspecting and locating insulation defects in overhead power distribution lines. Utility Model Content

[0004] This application provides a device for locating insulation defects in overhead distribution lines, which improves the efficiency and safety of insulation defect inspection, and reduces operation and maintenance costs and accident rates.

[0005] In view of this, this application provides a device for inspecting and locating insulation defects in overhead power distribution lines, comprising: a drone body;

[0006] The bottom of the drone body is fixedly connected to a support base plate;

[0007] The bottom of the support base plate is provided with a fixing mechanism for clamping the wire and a connecting mechanism for adsorbing and fixing the wire.

[0008] An inspection mechanism is provided on the supporting base plate;

[0009] The inspection mechanism includes cameras on both sides of the main body of the drone, a detection host that can be detachably installed on the support base plate, a pulse injection device fixed to one side of the bottom of the support base plate, and multiple scanning emission ports on both sides of the support base plate.

[0010] The camera, the pulse injection device, and the scanning emission port are all electrically connected to the detection host.

[0011] The pulse injection device includes a first pulse generation circuit and a first receiving circuit;

[0012] The scanning transmission port includes a second pulse generation circuit and a second receiving circuit.

[0013] The first pulse generating circuit is electrically connected to the second receiving circuit;

[0014] The second pulse generating circuit is electrically connected to the first receiving circuit.

[0015] Optionally, the fixing mechanism includes a fixing connecting plate;

[0016] The lower surface of the support base plate is provided with a sliding groove along its length.

[0017] The top of the fixed connecting plate is slidably connected to the slide groove via a first telescopic drive component;

[0018] A fixing plate is fixedly connected to one side of the fixing connecting plate;

[0019] The fixing plate is provided with a clamping assembly for clamping the wire;

[0020] A cylinder is fixedly installed on the fixed connecting plate;

[0021] The cylinder is connected to the clamping assembly via a linkage component to achieve adaptive clamping of the wire.

[0022] Optionally, the clamping assembly includes a fixing clamp, a connecting crossbar, and a support slot.

[0023] The support slot is fixedly mounted on the fixing plate and is used to support the wire;

[0024] A first rotating shaft is fixedly connected to the connecting crossbar;

[0025] One end of the first rotating shaft passes through the connecting crossbar and is slidably connected to the fixed connecting plate in the horizontal direction;

[0026] The other end of the first rotating shaft is rotatably connected to the upper part of the fixing clamp;

[0027] A second rotating shaft is fixedly connected to the fixed plate;

[0028] The second rotating shaft is rotatably connected to the middle of the fixing clamp;

[0029] The fixing clip is located directly above the support slot, and a clamping space is formed between the fixing clip and the support slot;

[0030] The cylinder is connected to the connecting crossbar via the linkage assembly, and is used to clamp and release the fixing clamp by driving the connecting crossbar to slide in the horizontal direction.

[0031] Optionally, the linkage component includes a connecting ring, a sliding ring, and a connecting rod;

[0032] The sliding ring is a square ring structure composed of a U-shaped rod and a sliding rod;

[0033] The fixing plate is provided with horizontal sliding holes;

[0034] The U-shaped rod is located outside the horizontal sliding hole;

[0035] The sliding rod passes through the horizontal sliding hole and is slidably connected to the horizontal sliding hole;

[0036] The connecting ring is sleeved on the U-shaped rod, and the outside of the connecting ring is fixedly connected to the output end of the cylinder;

[0037] One end of the connecting rod is rotatably connected to the sliding rod, and the other end is rotatably connected to the connecting crossbar.

[0038] Optionally, the pulse injection device includes a pulse connection port;

[0039] The pulse connection port is located on the side of the fixed connection plate away from the fixed plate;

[0040] The fixed connecting plate and the fixed plate are respectively provided with through holes for injecting pulse signals into the wires through the pulse connection port via parasitic capacitance coupling.

[0041] Optionally, the connecting mechanism includes a second telescopic drive member, a support plate, and a connecting column;

[0042] The second telescopic drive component is fixed to the lower surface of the support base plate, and the output end of the second telescopic drive component is fixedly connected to the support plate, for driving the support plate to move up and down in the vertical direction;

[0043] At least two of the connecting columns are fixed at intervals to the bottom of the support plate;

[0044] A vacuum suction cup is provided at the bottom of the connecting column;

[0045] The connecting column is equipped with a vacuum pump for evacuating the vacuum suction cup.

[0046] Optionally, a support ring for limiting the position of the detection host is provided on the top of the support base plate;

[0047] The bottom of the detection host is slidably connected to the inner wall of the support ring in the vertical direction;

[0048] The bottom of the detection host is equipped with locking teeth;

[0049] The upper surface of the support base plate is provided with a corresponding slot for engaging with the locking teeth;

[0050] The detection host is engaged with the slot via the locking teeth.

[0051] Optionally, the transmitter of the detection host has a built-in adjustable capacitor coupling structure.

[0052] Optionally, the detection host integrates a partial discharge sensor, an infrared thermal imager, and an ultraviolet imaging module;

[0053] The detection host is equipped with wireless communication antennas on both sides.

[0054] Optionally, the top two sides of the support base plate are provided with baffles for protecting the detection host.

[0055] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: The overhead power distribution line insulation defect inspection and positioning device constructs a stable working platform through a support base plate rigidly connected to the bottom of the UAV body. Its bottom fixing mechanism and connecting mechanism work together to achieve dual locking (clamping and adsorption) of the conductor, completely avoiding the risk of manual pole climbing; the inspection mechanism integrated into the support base plate forms an efficient detection closed loop: the cameras on both sides accurately locate the conductor, the detachable and installable detection host facilitates quick maintenance, and the pulse injection device and scanning emission port achieve accurate location of the fault point through a bidirectional closed loop circuit (the first pulse generation circuit is directly connected to the second receiving circuit to transmit calibration pulses, and the second pulse generation circuit is directly connected to the first receiving circuit to transmit reflected signals). Among them, the pulse injection device verifies the line length through capacitive coupling, and calculates the defect location based on the bidirectional signal time difference after scanning the transmission port to emit a high-frequency narrow pulse, which greatly improves the positioning accuracy; the high-altitude mobility of the UAV platform enables the device to cover the entire line in a single flight, improving the detection efficiency by more than 90% compared to manual inspection, and requiring no power outages throughout the process. It systematically overcomes the three major industry pain points of "low efficiency, high risk, and poor accuracy" in the inspection of distribution network insulation defects, and promotes the innovation of smart grid operation and maintenance technology paradigm. Attached Figure Description

[0056] Figure 1This is a schematic diagram of the first angle of the distribution network overhead line insulation defect inspection and positioning device in the embodiments of this application;

[0057] Figure 2 This is a schematic diagram of the second angle of the distribution network overhead line insulation defect inspection and positioning device in the embodiments of this application;

[0058] Figure 3 This is a schematic diagram of the connection structure between the detection host and the support ring in an embodiment of this application;

[0059] Figure 4 for Figure 3 Enlarged detail view of point A in the middle;

[0060] Figure 5 This is a schematic diagram of the third angle of the distribution network overhead line insulation defect inspection and positioning device in the embodiments of this application;

[0061] Figure 6 for Figure 5 Enlarged detail view of point B in the middle;

[0062] Figure 7 This is a schematic diagram of the fourth angle of the overhead power distribution line insulation defect inspection and positioning device in this application embodiment.

[0063] The attached figures are labeled as follows:

[0064] 1. UAV body; 2. Camera; 3. Support frame; 4. Support base plate; 5. Detection host; 6. Baffle; 7. Fixed connecting plate; 8. Connecting crossbar; 9. Fixing plate; 10. First rotating shaft; 11. Fixing clamp; 12. Support slot support; 13. Second rotating shaft; 14. Sliding ring; 15. Cylinder; 16. Connecting ring; 17. Pulse injection device; 18. Pulse connection port; 19. Second telescopic drive component; 20. Support plate; 21. Connecting column; 22. Scanning emission port; 23. Support ring; 24. Connecting rod. Detailed Implementation

[0065] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0066] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0068] This application provides an embodiment of a device for inspecting and locating insulation defects in overhead power distribution lines. Please refer to the following for details. Figure 1 , Figure 2 and Figure 5 .

[0069] The overhead power distribution line insulation defect inspection and positioning device in this embodiment includes: a drone body 1, a support base plate 4 fixedly connected to the bottom of the drone body 1, a fixing mechanism for clamping the conductor and a connecting mechanism for adsorbing and fixing the conductor at the bottom of the support base plate 4; an inspection mechanism is provided on the support base plate 4, the inspection mechanism includes cameras 2 set on both sides of the drone body 1, a detection host 5 detachably installed on the support base plate 4, a pulse injection device 17 fixed on one side of the bottom of the support base plate 4, and multiple scanning emission ports 22 set on both sides of the support base plate 4. The cameras 2, the pulse injection device 17 and the scanning emission ports 22 are all electrically connected to the detection host 5. The pulse injection device 17 includes a first pulse generation circuit and a first receiving circuit. The scanning emission ports 22 include a second pulse generation circuit and a second receiving circuit. The first pulse generation circuit is electrically connected to the second receiving circuit, and the second pulse generation circuit is electrically connected to the first receiving circuit.

[0070] It should be noted that: This overhead power distribution line insulation defect inspection and positioning device constructs a stable working platform through the support base plate 4 rigidly connected to the bottom of the UAV body 1. Its bottom fixing mechanism and connecting mechanism work together to achieve dual locking (clamping and adsorption) of the conductor, completely avoiding the risks of manual pole climbing; the inspection mechanism integrated into the support base plate 4 forms an efficient detection closed loop: the cameras 2 on both sides accurately locate the conductor, the detachable detection host 5 facilitates quick maintenance, and the pulse injection device 17 and the scanning emission port 22 achieve accurate fault location through a bidirectional closed loop circuit (the first pulse generation circuit is directly connected to the second receiving circuit to transmit calibration pulses, and the second pulse generation circuit is directly connected to the first receiving circuit to transmit reflected signals). Among them, the pulse injection device 17 verifies the line length through capacitive coupling, and after scanning the emission port 22 to emit high-frequency narrow pulses, it calculates the defect location based on the bidirectional signal time difference, which greatly improves the positioning accuracy. The high-altitude mobility of the UAV platform enables the device to cover the entire line in a single flight, improving the detection efficiency by more than 90% compared to manual inspection, and requiring no power outages throughout the process. It systematically overcomes the three major industry pain points of "low efficiency, high risk, and poor accuracy" in the inspection of distribution network insulation defects, and promotes the innovation of smart grid operation and maintenance technology paradigm.

[0071] The above is Embodiment 1 of a distribution network overhead line insulation defect inspection and location device provided in this application. The following is Embodiment 2 of the same device. Please refer to the following for details. Figures 1 to 7 .

[0072] The overhead power distribution line insulation defect inspection and positioning device in this embodiment includes: a drone body 1, a support base plate 4 fixedly connected to the bottom of the drone body 1, a fixing mechanism for clamping the conductor and a connecting mechanism for adsorbing and fixing the conductor at the bottom of the support base plate 4; an inspection mechanism is provided on the support base plate 4, the inspection mechanism includes cameras 2 set on both sides of the drone body 1, a detection host 5 detachably installed on the support base plate 4, a pulse injection device 17 fixed on one side of the bottom of the support base plate 4, and multiple scanning emission ports 22 set on both sides of the support base plate 4. The cameras 2, the pulse injection device 17 and the scanning emission ports 22 are all electrically connected to the detection host 5. The pulse injection device 17 includes a first pulse generation circuit and a first receiving circuit. The scanning emission ports 22 include a second pulse generation circuit and a second receiving circuit. The first pulse generation circuit is electrically connected to the second receiving circuit, and the second pulse generation circuit is electrically connected to the first receiving circuit.

[0073] Understandably, the scanning transmitter 22 is used to verify the actual length of the line and calculate the distance to the fault point by injecting pulse signals and cooperating with dual-end traveling wave positioning. Specifically, the detection host 5 sends command pulse frequency, amplitude, and injection duration to the pulse injection device 17 and the scanning transmitter 22, adjusting the operating parameters of the scanning transmitter 22. After the signal is injected into the scanning transmitter 22, the detection host 5 calculates the positioning data by receiving the reflected signal or traveling wave signal from the other end of the conductor, displays the problem area, and controls the drone to locate the position. The camera 2 uses a binocular vision module equipped with AI image recognition, which enables real-time identification of insulators, clamps, and other hardware through the detection host 5, assisting the drone in locating the installation point.

[0074] The fixing mechanism includes a fixing connecting plate 7. A groove is formed along the length of the lower surface of the supporting base plate 4. The top of the fixing connecting plate 7 is slidably connected to the groove via a first telescopic drive component. A fixing plate 9 is fixedly connected to one side of the fixing connecting plate 7. A clamping assembly for clamping wires is provided on the fixing plate 9. A cylinder 15 is fixedly installed on the fixing connecting plate 7. The cylinder 15 is connected to the clamping assembly via a linkage component to achieve adaptive clamping of the wires. Specifically, the surface of the fixing plate 9 is coated with an insulating coating.

[0075] Understandably, the fixing mechanism is used to contact the location of the wire problem and to keep the circuit running normally by stimulating it with pulses.

[0076] The clamping assembly includes a fixed clamp 11, a connecting crossbar 8, and a support slot 12. The support slot 12 is fixedly mounted on the fixed plate 9 to support the wire. A first rotating shaft 10 is fixedly connected to the connecting crossbar 8. One end of the first rotating shaft 10 passes through the connecting crossbar 8 and is slidably connected to the fixed connecting plate 7 in the horizontal direction. The other end of the first rotating shaft 10 is rotatably connected to the upper part of the fixed clamp 11. A second rotating shaft 13 is fixedly connected to the fixed plate 9 and is rotatably connected to the middle part of the fixed clamp 11. The fixed clamp 11 is located directly above the support slot 12, and a clamping space is formed between the fixed clamp 11 and the support slot 12. A cylinder 15 is connected to the connecting crossbar 8 through a linkage assembly and is used to achieve adaptive clamping of the wire by driving the connecting crossbar 8 to slide in the horizontal direction, maintaining a constant air gap, and avoiding signal attenuation or electromagnetic interference caused by poor contact.

[0077] The linkage assembly includes a connecting ring 16, a sliding ring 14, and a connecting rod 24. The sliding ring 14 is a square ring structure composed of a U-shaped rod and a sliding rod. A horizontal sliding hole is provided on the fixing plate 9. The U-shaped rod is located outside the horizontal sliding hole, and the sliding rod passes through the horizontal sliding hole and is slidably connected to the horizontal sliding hole. The connecting ring 16 is sleeved on the U-shaped rod, and the outside of the connecting ring 16 is fixedly connected to the output end of the cylinder 15. One end of the connecting rod 24 is rotatably connected to the sliding rod, and the other end is rotatably connected to the connecting crossbar 8.

[0078] The pulse injection device 17 includes a pulse connection port 18, which is located on the side of the fixed connecting plate 7 away from the fixed plate 9. The fixed connecting plate 7 and the fixed plate 9 have corresponding through holes for injecting pulse signals into the conductor via the pulse connection port 18 through parasitic capacitance coupling. The pulse connection port 18 couples the signal through the through holes to the conductor on the support slot 12 for pulse stimulation. Parasitic capacitance coupling is established between the pulse connection port 18 and the conductor, injecting calibration pulses for line length verification and clock synchronization in dual-end positioning technology. Specifically, the pulse connection port 18 uses a metal connector. When it is close to the conductor, it acts as two plates of a capacitor, with the air or other insulating medium in between acting as the insulating layer. When the pulse injection device 17 generates a pulse signal, the potential at the pulse connection port 18 changes. Due to the parasitic capacitance, this potential change induces a corresponding charge change in the conductor, thereby achieving signal coupling and transmission.

[0079] It should be noted that the pulse injection device 17 has a built-in high-frequency pulse generator, supporting both capacitive and inductive coupling modes to achieve non-invasive detection. Utilizing the reflection, attenuation, and distortion characteristics of pulse signals during cable transmission, combined with time and spatial measurements, it accurately determines the location of partial discharge. This technology offers high positioning accuracy, fast response speed, and low interference. Specifically, the Keysight 81150A pulse function arbitrary noise generator can be used, which has signal generation, modulation, and distortion functions, enabling it to generate specific forms of pulse signals for non-invasive detection.

[0080] The connecting mechanism is used to assist in fixing the wire. The connecting mechanism includes a second telescopic drive member 19, a support plate 20, and connecting posts 21. The second telescopic drive member 19 is fixed to the lower surface of the support base plate 4, and its output end is fixedly connected to the support plate 20, used to drive the support plate 20 to move vertically up and down. At least two connecting posts 21 are fixedly spaced at the bottom of the support plate 20. A vacuum suction cup is provided at the bottom of each connecting post 21, and a vacuum pump is installed inside the connecting post 21 to evacuate the vacuum suction cup. By activating the vacuum pump, the air pressure inside the vacuum suction cup can be reduced in a short time, thereby firmly adsorbing the wire. Specifically, the vacuum suction cup is an arc-shaped silicone rubber surface located at the bottom of the connecting post 21. In this embodiment, there are three connecting posts 21.

[0081] A support ring 23 for limiting the position of the detection host 5 is fixedly installed on the top of the support base plate 4. The bottom of the detection host 5 is slidably connected to the inner wall of the support ring 23 in the vertical direction. The bottom of the detection host 5 is provided with locking teeth, and the upper surface of the support base plate 4 is provided with corresponding locking grooves for cooperating with the locking teeth. The detection host 5 is engaged with the locking teeth and locking grooves. Specifically, the locking teeth can be a square strip structure, and the shape of the locking groove is adapted to the shape of the locking teeth to facilitate fixing the detection host 5 and prevent it from shifting. The support ring 23 is a square frame structure surrounding the outside of the detection host 5 to fix the position of the detection host 5. Both the locking teeth and the support base plate 4 are made of polytetrafluoroethylene insulation material to ensure stable mechanical connection and electrical isolation.

[0082] The transmitter of the detection host 5 has a built-in adjustable capacitor coupling structure, which can generate and adjust MHz-level high-frequency narrow pulse signals as needed.

[0083] Understandably, capacitive coupling is a common signal transmission method in the electronics field. This adjustable capacitive coupling structure is existing technology. It changes the capacitance value by finely adjusting the spacing of a pair of metal plates, injecting pulse signals into the line non-contactly via parasitic capacitance coupling. Combined with the scanning transmitter 22 and receiving device at both ends of the line, the transmitted pulse signal propagates along the conductor and is reflected and refracted at the fault point. The system calculates the distance to the fault point by measuring the time difference between the transmitted and reflected signals and combining this with the wave velocity. Simultaneous signal transmission at both ends and recording the arrival time allow for verification of the actual line length, ensuring the accuracy of transmission line maintenance data.

[0084] The detection host 5 integrates a partial discharge sensor, an infrared thermal imager, and an ultraviolet imaging module, supporting simultaneous acquisition of multi-source data. Wireless communication antennas are located on both sides of the detection host 5, supporting real-time data transmission. The use of wireless communication avoids cumbersome on-site wiring and safety issues, facilitating flexible use in different locations. Specifically, the detection host 5 has a built-in lithium-sulfur battery, with a charging port located on the side of the host 5 near the battery. A single charge allows for continuous long-term operation, meeting low power consumption requirements and eliminating the need for a separate power supply. Furthermore, the detection host 5 features digital filtering capabilities, enabling noise filtering within a set frequency band, resulting in significant noise reduction and anti-interference effects.

[0085] It should be noted that this device is based on the principle of dual-end traveling wave positioning. The pulse injection device 17 is used to realize system self-testing and synchronization, and sends pulse signals to verify the length of the overhead line. The detection host 5 synchronously collects traveling wave data from both ends, and uses the time difference positioning method to calculate the defect location. Combined with the AI ​​algorithm, partial discharge, infrared and ultraviolet data are fused to realize automatic identification of defect type. Compared with traditional manual line inspection and positioning, it can greatly improve work efficiency and positioning accuracy.

[0086] The top two sides of the support base plate 4 are equipped with baffles 6 to protect the detection host 5. Support frames 3 are fixedly connected to the bottom two sides of the drone body 1. The support frames 3 are foldable insulated structures that can be unfolded to provide stable support. The outer shell of the drone body 1 can be made of carbon fiber epoxy resin composite material with an antistatic coating to meet the insulation requirements for live-line work. Specifically, the drone body 1 has a built-in RTK-GPS module and inertial navigation system, enabling centimeter-level flight path control.

[0087] In practice, the main body of the drone 1, equipped with the detection host 5 and pulse injection device 17, takes off and flies along a preset route. The cameras 2 on both sides capture video in real time and transmit it back to the ground station. The lidar inside the detection host 5 synchronously constructs a three-dimensional point cloud model of the line. The obstacle avoidance system automatically avoids obstacles such as poles and crossarms. The data is transmitted to the control panel of the drone, which then flies to the conductor near the insulator of the target detection point. The drone hovers at a vertical distance from the conductor. At the same time, the first telescopic drive component on the top of the fixed connecting plate 7 is activated, causing the fixed plate 9 to descend. The support slot 12 is aligned with the bottom of the conductor and hooks it. At this time, the fixing clamp 11 maintains an air insulation gap with the conductor. The cylinder 15 pulls the connecting ring 16, causing the sliding rod of the sliding ring 14 to slide in the horizontal sliding hole. Then, the connecting rod 24 drives the connecting crossbar 8 to slide horizontally on the fixed connecting plate 7. At this time, the connecting crossbar 8 pulls the fixing clamp 11, causing the fixing clamp 11 to rotate around the second rotating shaft 13, thereby reducing the distance between the fixing clamp 11 and the support slot 12, and realizing the clamping and fixing of the conductor. At the same time, the second telescopic drive component 19 extends, causing the support plate 20 and the connecting column 21 to move down synchronously. The vacuum suction cup at the bottom of the connecting column 21 is used to adhere to the outside of the wire. The pulse connection port 18 at the bottom of the pulse injection device 17 establishes capacitive coupling with the wire through the corresponding through holes on the fixed connecting plate 7 and the fixed plate 9. The pulse injection device 17 emits calibration pulses to stimulate the wire to repair.

[0088] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A device for inspecting and locating insulation defects in overhead power distribution lines, characterized in that, include: The main body of the drone; The bottom of the drone body is fixedly connected to a support base plate; The bottom of the support base plate is provided with a fixing mechanism for clamping the wire and a connecting mechanism for adsorbing and fixing the wire. An inspection mechanism is provided on the supporting base plate; The inspection mechanism includes cameras on both sides of the main body of the drone, a detection host that can be detachably installed on the support base plate, a pulse injection device fixed to one side of the bottom of the support base plate, and multiple scanning emission ports on both sides of the support base plate. The camera, the pulse injection device, and the scanning emission port are all electrically connected to the detection host. The pulse injection device includes a first pulse generation circuit and a first receiving circuit; The scanning transmission port includes a second pulse generation circuit and a second receiving circuit. The first pulse generating circuit is electrically connected to the second receiving circuit; The second pulse generating circuit is electrically connected to the first receiving circuit.

2. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 1, characterized in that, The fixing mechanism includes a fixing connecting plate; The lower surface of the support base plate is provided with a sliding groove along its length. The top of the fixed connecting plate is slidably connected to the slide groove via a first telescopic drive component; A fixing plate is fixedly connected to one side of the fixing connecting plate; The fixing plate is provided with a clamping assembly for clamping the wire; A cylinder is fixedly installed on the fixed connecting plate; The cylinder is connected to the clamping assembly via a linkage component to achieve adaptive clamping of the wire.

3. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 2, characterized in that, The clamping assembly includes a fixing clamp, a connecting crossbar, and a support slot. The support slot is fixedly mounted on the fixing plate and is used to support the wire; A first rotating shaft is fixedly connected to the connecting crossbar; One end of the first rotating shaft passes through the connecting crossbar and is slidably connected to the fixed connecting plate in the horizontal direction; The other end of the first rotating shaft is rotatably connected to the upper part of the fixing clamp; A second rotating shaft is fixedly connected to the fixed plate; The second rotating shaft is rotatably connected to the middle of the fixing clamp; The fixing clip is located directly above the support slot, and a clamping space is formed between the fixing clip and the support slot; The cylinder is connected to the connecting crossbar via the linkage assembly, and is used to clamp and release the fixing clamp by driving the connecting crossbar to slide in the horizontal direction.

4. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 3, characterized in that, The linkage component includes a connecting ring, a sliding ring, and a connecting rod; The sliding ring is a square ring structure composed of a U-shaped rod and a sliding rod; The fixing plate is provided with horizontal sliding holes; The U-shaped rod is located outside the horizontal sliding hole; The sliding rod passes through the horizontal sliding hole and is slidably connected to the horizontal sliding hole; The connecting ring is sleeved on the U-shaped rod, and the outside of the connecting ring is fixedly connected to the output end of the cylinder; One end of the connecting rod is rotatably connected to the sliding rod, and the other end is rotatably connected to the connecting crossbar.

5. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 2, characterized in that, The pulse injection device includes a pulse connection port; The pulse connection port is located on the side of the fixed connection plate away from the fixed plate; The fixed connecting plate and the fixed plate are respectively provided with through holes for injecting pulse signals into the wires through the pulse connection port via parasitic capacitance coupling.

6. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 1, characterized in that, The connecting mechanism includes a second telescopic drive component, a support plate, and a connecting column; The second telescopic drive component is fixed to the lower surface of the support base plate, and the output end of the second telescopic drive component is fixedly connected to the support plate, for driving the support plate to move up and down in the vertical direction; At least two of the connecting columns are fixed at intervals to the bottom of the support plate; A vacuum suction cup is provided at the bottom of the connecting column; The connecting column is equipped with a vacuum pump for evacuating the vacuum suction cup.

7. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 1, characterized in that, The top of the support base plate is provided with a support ring for limiting the position of the detection host. The bottom of the detection host is slidably connected to the inner wall of the support ring in the vertical direction; The bottom of the detection host is equipped with locking teeth; The upper surface of the support base plate is provided with a corresponding slot for engaging with the locking teeth; The detection host is engaged with the slot via the locking teeth.

8. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 1, characterized in that, The transmitter of the detection host has a built-in adjustable capacitor coupling structure.

9. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 1, characterized in that, The detection host integrates a partial discharge sensor, an infrared thermal imager, and an ultraviolet imaging module. The detection host is equipped with wireless communication antennas on both sides.

10. The device for inspecting and locating insulation defects in overhead power distribution lines according to claim 1, characterized in that, The top two sides of the support base plate are provided with baffles to protect the detection host.

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