A cloud platform support and high-voltage power cable internal defect diagnosis system

Abstract

The application belongs to the technical field of cable detection, and discloses a holder for a cloud platform and a high-voltage power cable internal defect diagnosis system. The holder for the cloud platform comprises first and second alignment devices which are slidably connected, and a guide structure with an annular distribution positioning device is rotatably installed at both ends of the alignment devices, so that the detection equipment can be accurately positioned on the outer periphery of the high-voltage cable. Relying on the cooperation of the motor, the transmission gear and the gear ring, 360° rotation detection of the detection equipment can be realized, and the end driving motor of the positioning device can complete the longitudinal displacement of the equipment cable, so that omnidirectional and multi-zone adjustable detection can be realized. The diagnosis system collects working state data and environmental data such as cable operating current and temperature through a high-frequency current sensor and an infrared temperature sensor, respectively calculates current, temperature and gas concentration evaluation coefficients through a defect diagnosis module, obtains a comprehensive defect evaluation coefficient by weighted summation, and finally determines and triggers the early warning according to the coefficient by an intelligent early warning module, so that the intelligent diagnosis and early warning of the cable defects are realized.

Description

Technical Field

[0001] This invention relates to the field of cable testing technology, specifically a pan-tilt bracket and a diagnostic system for internal defects in high-voltage power cables. Background Technology

[0002] Rapid diagnosis of internal defects in high-voltage power cables has moved from traditional power outage testing to a new era of live, non-destructive, and intelligent testing. Currently, mainstream instruments are mainly based on three technical routes: oscillating wave partial discharge detectors locate partial discharge points by exciting damped oscillating waves inside the cable, with sensitivity reaching the picocou level, effectively detecting joint construction defects and hidden dangers such as air gaps inside the insulation; dielectric loss and infrared spectroscopy analyzers quickly assess the overall moisture aging and electrochemical damage of the cable by measuring the loss factor of the insulation material or detecting the characteristic gases generated by the ablation of the buffer layer.

[0003] Devices based on time-domain reflectometry and 3D scanning can accurately locate structural defects such as water tree aging or mechanical deformation, and even achieve 3D modeling of the internal structure of cables. These devices are generally integrated and portable, and can complete the detection in tens of minutes or even seconds, and automatically generate diagnostic reports in combination with AI algorithms.

[0004] Reference 1: Chinese patent document with publication number CN217981790U.

[0005] Reference 1 describes a rapid intelligent diagnostic device for high-voltage cable faults, relating to the field of high-voltage cable technology. The device includes a frame body, with side plates fixed to the top of the frame body near the edges of both side walls. A sleeve is provided on one side of one of the side plates, and a magnetic rod is installed inside the sleeve. One end of the magnetic rod extends through to one side of the other side plate. A pulley is rotatably connected to the outer surface of the sleeve at its center. The outer surface of the pulley has an arc-shaped groove. By using the pulley, the detection device can be fixed to the outer surface of the high-voltage cable via the frame and slid, thereby enabling the detection of the entire cable.

[0006] Reference 2: Chinese patent document with publication number CN217766685U.

[0007] Reference 2 describes a rapid intelligent diagnostic device for high-voltage cable faults, including a fixed frame with a through groove at the bottom center. A cable body is slidably connected inside the through groove. A limiting assembly is provided between the fixed frame and the cable body. The limiting assembly includes two connecting rods, two drive wheels, two electric push rods, two mounting brackets, and two auxiliary rollers. A transmission assembly is provided between the two connecting rods. This rapid intelligent diagnostic device for high-voltage cable faults, through the design of the limiting assembly, suspends the fixed frame on the surface of the cable body via the through groove. Then, the electric push rods operate until the cable body is clamped between the two drive wheels and the two auxiliary rollers, effectively solving the problem that traditional rapid intelligent diagnostic devices for high-voltage cable faults cannot diagnose faults in cables of different sizes.

[0008] However, the aforementioned cable testing and diagnostic instruments cannot perform 360° rotation testing and cannot quickly detect defects. Therefore, an improved device is needed to address these issues. Summary of the Invention

[0009] To address the problems in the prior art, the present invention provides a gimbal bracket and a system for diagnosing internal defects in high-voltage power cables.

[0010] The technical solution adopted by this invention to solve its technical problem is: On one hand, the present invention provides a gimbal bracket, including a data acquisition device, a first alignment device, a second alignment device, a guide device, and a positioning device; A first alignment device and a second alignment device, wherein the front ends of the first alignment device and the second alignment device are slidably connected. The acquisition equipment includes an imaging plate and an X-ray machine. The imaging plate is fixed on the first alignment device, and the X-ray machine is fixed on the second alignment device. The X-ray machine and the imaging plate are used to inspect high-voltage cables. The guide device is set at both ends of the first alignment device and rotates and is sleeved with the first alignment device. The guide device drives the first alignment device and the second alignment device and their structures to rotate 360° radially around the high voltage cable through the meshing of the gear ring and the drive transmission gear. The positioning device is installed on the guide device and has multiple sets. The multiple sets of positioning devices are distributed in a ring around the high-voltage cable. The hydraulic cylinder ends on the multiple sets of positioning devices move simultaneously radially toward the surface of the high-voltage cable, restricting the first alignment device and the second alignment device, as well as the acquisition equipment on the first alignment device and the second alignment device, to the high-voltage cable. The positioning device can drive the first alignment device and the second alignment device and the acquisition equipment on them to travel a long distance longitudinally along the high-voltage cable through the drive motor and drive wheel.

[0011] Preferably, the first alignment device includes a transmission gear, a drive motor, a T-shaped arc bracket, an imaging plate, a side support, a connecting arm, a guide rod, and a side support plate. The side support plate is fixedly installed at both ends of the imaging plate, the side support is fixedly installed on the side end of the side support plate away from the imaging plate, the connecting arm is fixedly installed on the inner side of the side support near the imaging plate, the T-shaped arc bracket is fixedly installed on the outer side of the side support, the guide rod is fixedly installed on the end of the connecting arm away from the imaging plate, the drive motor is fixedly installed on the side end of the side support plate away from the imaging plate, and the transmission gear is fixedly installed at the center of the side end of the drive motor, and the transmission gear is driven by the drive motor.

[0012] Preferably, the second alignment device includes a second bolt, a rear end bracket, an X-ray machine, and a U-shaped bracket. The X-ray machine is fixedly installed inside the rear end bracket, and the U-shaped bracket is fixedly installed at both ends of the rear end bracket. The guide rod enters the hollow end of the U-shaped bracket, and the second bolt is threaded into the U-shaped bracket and the guide rod.

[0013] Preferably, the guiding device includes a gear ring, a first bolt, a mating plate, and a supporting side ring. The gear ring is fixedly installed on the side end of the supporting side ring. Both the gear ring and the supporting side ring are circular. The gear ring and the supporting side ring are divided into two semi-circular structures. The two ends of the two semi-circular structures are respectively provided with mating plates. The mating plates are respectively fixedly installed at the junction of the supporting side ring and the gear ring. The first bolt is threaded into the interior of two sets of adjacent mating plates on different semi-circular structures.

[0014] Preferably, the positioning device further includes a connecting base plate and a guide rod. The hydraulic cylinder is fixedly installed inside the connecting base plate, and the drive motor is fixedly installed at one end of the hydraulic cylinder. The guide rod is symmetrical and slides through the connecting base plate and is connected to the end of the drive motor near the connecting base plate. The connecting base plate is fixedly installed on the side end of the support side ring near the gear ring, and the connecting base plate is arranged in a ring. A drive wheel is fixedly installed at the end of the drive motor away from the connecting base plate.

[0015] Preferably, a synchronization device is symmetrically fixedly installed on the side ends of the first alignment device and the second alignment device. The synchronization device includes a nylon brush, a circular washer, a return spring, an extension side arm, a support sleeve, a guide cylinder, and an arc sleeve. The support sleeve is symmetrically fixedly installed on the side end of the extension side arm. The return spring is fixedly installed inside the support sleeve. The circular washer is fixedly installed on the end of the return spring away from the extension side arm. The guide cylinder slides through the support sleeve and is connected to the end of the circular washer away from the return spring. The arc sleeve is fixedly installed between the two guide cylinders. The nylon brush is fixedly installed on the inner side of the arc sleeve away from the guide cylinder.

[0016] Preferably, the support sleeve has a circular hole inside near the arc-shaped bracket, the T-shaped guide panel has a slot on the side away from the auxiliary buckle, the guide key is connected to the U-shaped bracket and the connecting arm on the side away from the auxiliary buckle, a plastic ring is installed at the bottom of the auxiliary buckle, the support sleeve is hollow inside, and the side of the arc-shaped bracket away from the extended side arm is in contact with the outer surface of the high-voltage cable.

[0017] Preferably, an installation device is provided on the outer side of the first alignment device and the second alignment device. The installation device includes a plastic ring, a lower buckle, an upper buckle, a T-shaped guide panel, a top crossbar, a handle, a guide key, and an auxiliary buckle. The T-shaped guide panel and the auxiliary buckle are symmetrically fixedly installed at the bottom end of the handle, and the auxiliary buckle is located inside the T-shaped guide panel. The guide key is symmetrically slidably inserted into the inside of the side end of the T-shaped guide panel away from the auxiliary buckle. The top crossbar is fixedly installed at the side end of the T-shaped guide panel away from the auxiliary buckle. The upper buckle is fixedly installed at the bottom end of the top crossbar. The lower buckle is fixedly installed at the bottom end of the upper buckle. The plastic ring is fixedly installed on the inner sides of the upper buckle and the lower buckle.

[0018] On the other hand, the present invention provides a high-voltage power cable internal defect diagnosis system, which uses the above-mentioned gimbal bracket to complete defect diagnosis, including a drive module, a cable data acquisition module, a defect diagnosis module and an intelligent early warning module; The drive module is used to control the drive motor, hydraulic cylinder and drive motor in the gimbal bracket to drive the acquisition device.

[0019] The cable data acquisition module is used to collect working status data and working environment data of the cable during power transmission.

[0020] The defect diagnosis module includes a current anomaly analysis unit, a temperature anomaly analysis unit, and a gas anomaly analysis unit. The current anomaly analysis unit calculates a current evaluation coefficient based on the working status data, the temperature anomaly analysis unit calculates a temperature evaluation coefficient based on the working status data, and the gas anomaly analysis unit calculates a concentration evaluation coefficient based on the working environment data. The defect diagnosis module weights and sums the current evaluation coefficient, the concentration evaluation coefficient, and the temperature evaluation coefficient to obtain a comprehensive defect evaluation coefficient. The intelligent early warning module determines whether to issue an early warning based on a comprehensive defect evaluation coefficient.

[0021] The operating status data includes the cable's operating current and operating temperature, which are acquired by a high-frequency current sensor and an infrared temperature sensor, respectively.

[0022] The working environment data specifically refers to the gas concentration in the working environment of the cable, which is obtained by a gas concentration sensor.

[0023] The expression for the current evaluation coefficient is as follows: (1); In equation (1), Indicates the current evaluation coefficient; Indicates the operating current of the cable; Indicates the rated current of the cable; This represents the average historical operating current of the cable; This represents the standard deviation of the cable's historical operating current. It is an exponential function; and These are the weighting coefficients. ; It represents the absolute value.

[0024] The expression for the temperature evaluation coefficient is as follows: (2); In equation (2), Indicates the temperature assessment coefficient; and This is the adjustment coefficient; Indicates the operating temperature of the cable; This indicates the maximum temperature threshold at which the cable is safe to operate. It is an exponential function.

[0025] The calculation process for the concentration assessment coefficient includes the following steps: Step S1: Calculate the first concentration evaluation coefficient based on the gas concentration in the cable's working environment. ; Step S2: Calculate the second concentration assessment coefficient ; Step S3: Evaluate the first concentration coefficient Second concentration evaluation coefficient The concentration assessment coefficient is obtained by weighted summation. .

[0026] The first concentration evaluation coefficient in step S1 The expression is as follows: (3); In equation (3), This represents the first concentration assessment coefficient; Indicates the first in the cable working environment The weighting coefficients corresponding to the gases ; Indicates the first in the cable working environment The concentration of the gas; Indicates the first in the cable working environment The standard concentrations corresponding to these gases; This indicates the total number of gas types that need to be monitored in the cable's working environment; This indicates a summation operation.

[0027] The second concentration evaluation coefficient in step S2 The expression is as follows: (4); In equation (4), This represents the second concentration assessment coefficient; Indicates the first in the cable working environment The weighting coefficients corresponding to the gases ; Indicates the first in the cable working environment The gas at time The corresponding concentration; Indicates the first in the cable working environment At any time, a gas forward Concentration at that time; Indicates a time period; This indicates a summation operation.

[0028] In step S3, the defect diagnosis module weights and sums the current evaluation coefficient, concentration evaluation coefficient, and temperature evaluation coefficient to obtain the expression for the comprehensive defect evaluation coefficient, as follows: (5); In equation (5), This represents the overall defect assessment coefficient; , and These are the current evaluation coefficient, temperature evaluation coefficient, and concentration evaluation coefficient, respectively. , and These are the weighting coefficients. .

[0029] The intelligent early warning module determines whether to issue an early warning based on a comprehensive defect evaluation coefficient. Specifically, when the comprehensive defect evaluation coefficient... When the comprehensive defect assessment coefficient is greater than or equal to the warning threshold, a warning is issued. No warning will be issued if the threshold is not met.

[0030] The beneficial effects of this invention are: First, this invention employs a segmented design for the gear ring and support side ring, facilitating their placement on the outer ring of the high-voltage cable. Simultaneously, when the hydraulic cylinder is activated, it drives the drive motor to contact the surface of the high-voltage cable, thus confining the device to the outer ring. Furthermore, the drive motor's activation allows for lateral movement of the entire device, facilitating adjustment of its detection position. Additionally, the guide rod and U-shaped bracket can be segmented and inserted, enabling the imaging plate and X-ray machine to be easily mounted on the outer ring of the high-voltage cable. This allows for rapid assembly and position adjustment of the device.

[0031] Second, when the drive motor is turned on, the transmission gear can rotate, and the transmission gear meshes with the gear ring, allowing the guide base rod and U-shaped bracket to rotate. At the same time, the T-shaped arc bracket is rotatably installed inside the side end of the support side ring, which can support the rotation of the imaging plate and the X-ray machine. Furthermore, by making the support side ring and gear ring coaxial with the high-voltage cable, the imaging plate and U-shaped bracket can rotate 360° along the outer ring of the high-voltage cable. Thus, the imaging plate can cooperate with the U-shaped bracket to scan and detect the high-voltage cable, completing the 360° scanning and detection of the high-voltage cable.

[0032] Third, this invention collects working status data and working environment data of the cable during power transmission, calculates current evaluation coefficient and temperature evaluation coefficient based on the working status data, and calculates concentration evaluation coefficient based on the working environment data. The current evaluation coefficient, concentration evaluation coefficient and temperature evaluation coefficient are weighted and summed to obtain a comprehensive defect evaluation coefficient. This multi-dimensional collaborative analysis of the cable's operating status under high voltage improves the accuracy of the comprehensive defect evaluation coefficient. Based on the comprehensive defect evaluation coefficient, it determines whether to issue an early warning, thus improving the timeliness of early warning when cable defects occur. Attached Figure Description

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] Figure 1 This is a three-dimensional structural diagram of the main body from a frontal perspective in Embodiment 1 of the present invention; Figure 2 This is a three-dimensional structural diagram of the first alignment device from the front view in this invention; Figure 3 This is a frontal perspective three-dimensional structural diagram of the second alignment device in this invention; Figure 4 This is a three-dimensional structural diagram of the guide device from the front view in this invention; Figure 5 This is a three-dimensional structural diagram of the positioning device from the front view in this invention; Figure 6 This is a three-dimensional structural diagram of the main body from a frontal perspective in Embodiment 2 of the present invention; Figure 7 This is a partial cross-sectional schematic diagram of the synchronization device in this invention; Figure 8 This is a three-dimensional structural diagram of the mounting device from the front view in this invention; Figure 9 This is a system block diagram of the high-voltage power cable internal defect diagnosis system of the present invention.

[0035] In the diagram: 1-Positioning device, 2-Guiding device, 3-First alignment device, 4-Second alignment device, 5-High-voltage cable, 6-Drive motor, 7-Connecting base plate, 8-Hydraulic cylinder, 9-Guide rod, 10-Gear ring, 11-First bolt, 12-Mating plate, 13-Supporting side ring, 14-Transmission gear, 15-Drive motor, 16-T-shaped arc bracket, 17-Imaging plate, 18-Side end bracket, 19-Connecting arm, 20-Guide base rod, 21-Side end support plate 22-Second Bolt, 23-Rear End Bracket, 24-X-ray Machine, 25-U-shaped Bracket, 26-Synchronization Device, 27-Erection Device, 28-Nylon Brush, 29-Round Washer, 30-Reset Spring, 31-Extended Side Arm, 32-Support Sleeve, 33-Guide Cylinder, 34-Arc Sleeve, 35-Plastic Ring, 36-Lower Buckle, 37-Upper Buckle, 38-T-shaped Guide Panel, 39-Top Horizontal Frame, 40-Handle, 41-Guide Locking Key, 42-Auxiliary Buckle. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0037] like Figure 1-4As shown, the present invention provides a pan-tilt bracket for carrying a high-voltage power cable internal defect diagnosis system. The pan-tilt bracket includes a data acquisition device, a first alignment device 3, and a second alignment device 4. The front ends of the first alignment device 3 and the second alignment device 4 are slidably connected. The first alignment device 3 and the second alignment device 4 are respectively placed on both sides of the high-voltage cable 5. The data acquisition device includes an imaging plate 17 and an X-ray machine 24. The imaging plate 17 is fixed on the first alignment device 3, and the X-ray machine 24 is fixed on the second alignment device 4. The high-voltage cable 5 is inspected using the X-ray machine 24 and the imaging plate 17. Guide devices 2 are rotatably sleeved at both ends of the first alignment device 3. The guide devices 2 include gear rings 10. The first alignment device 3 includes a transmission gear 14 and a drive motor 1 for driving the transmission gear 14 to rotate. 5. The transmission gear 14 engages with the gear ring 10. Starting the drive motor 15 drives the transmission gear and gear ring to rotate in opposite directions. Multiple positioning devices 1 are symmetrically fixedly installed on the side of the guide device 2 opposite to the first alignment device 3. These positioning devices 1 are arranged in a ring around the high-voltage cable 5. Each positioning device 1 includes a drive motor 6 installed at its end and a hydraulic cylinder 8 that controls the radial movement of the drive motor 6 along the high-voltage cable 5. Starting the hydraulic cylinder 8 places the drive motor 6 against the high-voltage cable. The multiple positioning devices 1 restrict the relative rotation of the gear ring 10 on the guide device 2 with the high-voltage cable. Starting the drive motor 15, the engagement of the transmission gear 14 and gear ring 10 drives the acquisition devices on the first alignment device 3 and the second alignment device 4 to rotate 360° around the high-voltage cable 5. Starting the drive motor 6, the drive motor 6, through the drive wheel, carries the acquisition devices on the first alignment device 3 and the second alignment device 4 along the longitudinal direction of the high-voltage cable 5.

[0038] like Figure 2 As shown, the first alignment device 3 includes a transmission gear 14, a drive motor 15, a T-shaped arc bracket 16, an imaging plate 17, a side support 18, a connecting arm 19, a guide rod 20, and a side support plate 21. The side support plate 21 is fixedly installed at both ends of the imaging plate 17. The side support 18 is fixedly installed on the side end of the side support plate 21 away from the imaging plate 17. The connecting arm 19 is fixedly installed on the inner side of the side support 18 near the imaging plate 17. The T-shaped arc bracket 16 is fixedly installed on the outer side of the side support 18. The guide rod 20 is fixedly installed on the end of the connecting arm 19 away from the imaging plate 17. The drive motor 15 is fixedly installed on the side end of the side support plate 21 away from the imaging plate 17. The transmission gear 14 is fixedly installed at the center of the side end of the drive motor 15.

[0039] like Figure 3The second alignment device 4 includes a second bolt 22, a rear support 23, an X-ray machine 24, and a U-shaped support 25. The X-ray machine 24 is fixedly installed inside the rear support 23, and the U-shaped support 25 is fixedly installed at both ends of the rear support 23. The second bolt 22 is threaded into the top and bottom of the front end of the U-shaped support 25. The rear support 23 can support the stable operation of the X-ray machine 24.

[0040] The guide rod 20 enters the hollow at the end of the U-shaped bracket 25, and the second bolt 22 is threaded onto the U-shaped bracket 25 and the guide rod 20, thereby connecting the first alignment device 3 and the second alignment device 4.

[0041] like Figure 4 In addition to the gear ring 10, the guide device 2 also includes a first bolt 11, a mating plate 12, and a supporting side ring 13. The gear ring 10 is fixedly installed on the side end of the supporting side ring 13. Both the gear ring 10 and the supporting side ring 13 are circular. The gear ring 10 and the supporting side ring 13 are divided into two semi-circular structures. The two ends of the two semi-circular structures are respectively provided with mating plates 12. The mating plates 12 are respectively fixedly installed at the junction of the supporting side ring 13 and the gear ring 10. The first bolt 11 is threaded into the interior of the two sets of adjacent mating plates 12 on different semi-circular structures. The gear ring 10 and the supporting side ring 13 can be connected and joined together, so that the guide device 2 can be easily installed on the outer ring of the high-voltage cable 5.

[0042] like Figure 5 In addition to the drive motor 6 and the hydraulic cylinder 8, the positioning device 1 also includes a connecting base plate 7 and a guide rod 9. The hydraulic cylinder 8 is fixedly installed inside the connecting base plate 7, and the drive motor 6 is fixedly installed at one end of the hydraulic cylinder 8. The guide rod 9 slides symmetrically through the connecting base plate 7 and is connected to the end of the drive motor 6 near the connecting base plate 7. Through the setting of the hydraulic cylinder 8, the drive motor 6 can be driven to contact or move away from the high-voltage cable 5.

[0043] The working principle of Example 1 is as follows: In use, the T-shaped arc bracket 16 can be rotatably installed in the rotating groove inside the side end of the support side ring 13, so that the imaging plate 17 can be installed on the support side ring 13. Then, by means of the semi-circular arrangement of the gear ring 10 and the support side ring 13, the gear ring 10 and the support side ring 13 can be joined together and sleeved on the outer ring of the high-voltage cable 5 until the mating plates 12 are aligned with each other. Then, the first bolt 11 is screwed into the inside of the two mating plates 12, so that the gear ring 10 and the support side ring 13 can be connected and installed. Then, the hydraulic cylinder 8 can be opened, and the piston rod inside the hydraulic cylinder 8 is connected to the drive motor 6, so that when the hydraulic cylinder 8 is running, it can drive the drive motor 6 to move until the drive wheel on the drive motor 6 is aligned with the outer surface of the high-voltage cable 5. The surface contact allows the connecting base plate 7, gear ring 10, and support side ring 13 to be placed on the outer ring of the high-voltage cable 5. Simultaneously, as the drive motor 6 moves, the guide rod 9 slides into the connecting base plate 7, supporting the drive motor 6 to move linearly and improving the docking accuracy between the drive motor 6 and the high-voltage cable 5. Then, the U-shaped bracket 25 can be moved to align with the guide base rod 20 until the U-shaped bracket 25 slides onto the outer ring of the guide base rod 20. Simultaneously, after aligning the threaded hole on the U-shaped bracket 25 with the threaded hole inside the guide base rod 20, the second bolt 22 is screwed into the U-shaped bracket 25 and the guide base rod 20, connecting the guide base rod 20 and the U-shaped bracket 25 as a whole. Afterward, the drive motor 1 can be turned on. 5. The transmission gear 14 is driven to rotate. Through the meshing of the transmission gear 14 with the gear ring 10, the rotation of the transmission gear 14 drives the connecting arm 19 and the U-shaped bracket 25 to rotate along the high-voltage cable 5. When the X-ray machine 24 is running, it can cooperate with the imaging plate 17 to perform internal defect detection on the high-voltage cable 5. Simultaneously, through the rotation of the imaging plate 17 and the X-ray machine 24, a 360° inspection of the high-voltage cable 5 can be performed, completing the imaging inspection of the interior of the high-voltage cable 5. When it is necessary to inspect different areas on the high-voltage cable 5, the drive motor 6 can be turned on. The drive motor 6 drives the drive wheel to rotate, allowing the device to move longitudinally along the outer surface of the high-voltage cable 5 until the imaging plate 17 and the X-ray machine 24 move to the designated inspection area. However, when using this device, after the testing work is completed, the second bolt 22 can be unscrewed from the inside of the U-shaped bracket 25 and the guide base rod 20 to release the U-shaped bracket 25. Then, the U-shaped bracket 25 can be removed from the guide base rod 20, and the first bolt 11 can be unscrewed from the inside of the mating plate 12 to remove the gear ring 10 and the support side ring 13 respectively. Before this, it can be ensured that the transmission gear 14 is located on the outer ring of the gear ring 10, and at the same time, the T-shaped arc bracket 16 is located in the rotating groove inside the support side ring 13. Then, the gear ring 10 and the support side ring 13 can be removed. Subsequently, the hydraulic cylinder 8 can be opened to drive the drive motor 6 to move and reset, so that the drive motor 6 can contact the outer surface of the high-voltage cable 5 again to complete the testing of the high-voltage cable 5. Example 2

[0044] Based on Example 1, such as Figure 6 and Figure 7 As shown, a synchronization device 26 is fixedly installed on the side ends of the U-shaped bracket 25 and the side end support plate 21. The synchronization device 26 includes a nylon brush 28, a round washer 29, a return spring 30, an extension side arm 31, a support sleeve 32, a guide cylinder 33, and an arc sleeve 34. The support sleeve 32 is symmetrically fixedly installed on the side end of the extension side arm 31. The return spring 30 is fixedly installed inside the support sleeve 32. The round washer 29 is fixedly installed on the end of the return spring 30 away from the extension side arm 31. The guide cylinder 33 slides through the support sleeve 32 and connects to the end of the round washer 29 away from the return spring 30. The arc sleeve 34 is fixedly installed between the two guide cylinders 33. The nylon brush 28 is fixedly installed on the inner side of the arc sleeve 34 away from the guide cylinder 33.

[0045] like Figure 8 The mounting device 27 includes a plastic ring 35, a lower buckle 36, an upper buckle 37, a T-shaped guide panel 38, a top crossbar 39, a handle 40, a guide key 41, and an auxiliary buckle 42. The T-shaped guide panel 38 and the auxiliary buckle 42 are symmetrically fixedly installed at the bottom of the handle 40, and the auxiliary buckle 42 is located inside the T-shaped guide panel 38. The guide key 41 is symmetrically slidably inserted into the inside of the side end of the T-shaped guide panel 38 away from the auxiliary buckle 42. The top crossbar 39 is fixedly installed at the side end of the T-shaped guide panel 38 away from the auxiliary buckle 42. The upper buckle 37 is fixedly installed at the bottom of the top crossbar 39. The lower buckle 36 is fixedly installed at the bottom of the upper buckle 37. The plastic ring 35 is fixedly installed on the inner sides of the upper buckle 37 and the lower buckle 36. The handle 40 can be easily removed from the U-shaped bracket 25 and the side support plate 21 by means of the guide key 41, so that it can be easily moved upward and taken out.

[0046] The connecting base plate 7 is fixedly installed on the side end of the supporting side ring 13 near the gear ring 10, and the connecting base plate 7 is arranged in a ring. The T-shaped arc bracket 16 is rotatably installed inside the side end of the supporting side ring 13 away from the gear ring 10. The drive motor 6 is attached to the outer surface of the high-voltage cable 5. The guide base rod 20 is slidably inserted into the front end of the U-shaped bracket 25. The extension side arm 31 is fixedly installed on the side end of the U-shaped bracket 25 and the side end support plate 21. The drive motor 6 is fixedly installed with a drive wheel at the end away from the connecting base plate 7. The side end of the supporting side ring 13 away from the gear ring 10 has a rotating groove. Both the gear ring 10 and the supporting side ring 13 are circular. Threaded holes are provided at the top and bottom of the rod 20 and the U-shaped bracket 25. Insertion holes are symmetrically provided inside the front end of the U-shaped bracket 25. The transmission gear 14 meshes with the gear ring 10. A round hole is provided inside the support sleeve 32 near the arc sleeve 34. A slot is provided on the side of the T-shaped guide panel 38 away from the auxiliary buckle 42. The guide key 41 is connected to the U-shaped bracket 25 and the connecting arm 19 on the side away from the auxiliary buckle 42. A plastic ring 35 is installed at the bottom of the auxiliary buckle 42. The inside of the support sleeve 32 is hollow. The side of the arc sleeve 34 away from the extension arm 31 is in contact with the outer surface of the high-voltage cable 5.

[0047] In implementing this embodiment, before installation, the handle 40 can be moved above the high-voltage cable 5 until the bottom ends of the auxiliary buckle 42 and the upper buckle 37 slide and overlap the top end of the high-voltage cable 5. Then, the lower buckle 36 is moved to align with the bottom end of the upper buckle 37. The external bolts are then screwed into the interior of the lower buckle 36 and the upper buckle 37, thus securing the handle 40 to the top end of the high-voltage cable 5. Subsequently, the connecting arm 19 and the U-shaped bracket 25 are connected to the guide locks 41 at the front and rear ends of the T-shaped guide panel 38, respectively. The guide key 41 can be slidably inserted into the slot on the side of the T-shaped guide panel 38, so that the imaging plate 17 can be aligned with the X-ray machine 24 in a straight line, improving the alignment accuracy of the gear ring 10 and the support side ring 13. After the U-shaped bracket 25, imaging plate 17, support side ring 13 and gear ring 10 are aligned, the bolts inside the lower buckle 36 and upper buckle 37 can be removed, and then the guide key 41 can be detached from the connecting arm 19 and the U-shaped bracket 25 respectively, making it easy to remove the handle 40 from the top of the high-voltage cable 5. When using this device, By extending the side arm 31 and installing it on the outside of the U-shaped bracket 25 and the side support plate 21, the U-shaped bracket 25 and the side support plate 21 can rotate, thereby driving the arc sleeve 34 to rotate simultaneously. The arc sleeve 34 can then drive the nylon brush 28 to rotate against the surface of the high-voltage cable 5, cleaning the outer surface of the high-voltage cable 5. When the side support plate 21 and the U-shaped bracket 25 move laterally left and right, the nylon brush 28 can move laterally along the surface of the high-voltage cable 5, removing impurities attached to the high-voltage cable 5. This lifts the drive motor. The internal drive wheel moves smoothly on the high-voltage cable 5. When the guide base rod 20 and the U-shaped bracket 25 are assembled together, the arc sleeve 34 can be driven to fit against the high-voltage cable 5, thereby improving the tightness of the fit between the arc sleeve 34 and the high-voltage cable 5. At the same time, the setting of the return spring 30 allows the guide cylinder 33 to enter the interior of the support sleeve 32, so that the return spring 30 can always squeeze the guide cylinder 33 to drive the arc sleeve 34 to fit tightly against the surface of the high-voltage cable 5, thereby improving the cleaning efficiency of the nylon brush 28 and completing the work. Example 3

[0048] Please see Figure 9 The present invention provides a high-voltage power cable internal defect diagnosis system, which includes: a drive module, a cable data acquisition module, a defect diagnosis module and an intelligent early warning module; The drive module controls the drive motor, hydraulic cylinder, and drive motor in the pan-tilt bracket to drive the acquisition device. The hydraulic cylinder 8 is activated, and its internal piston rod connects to the drive motor, allowing the hydraulic cylinder to move the drive motor 6 until the drive wheel on the drive motor 6 contacts the outer surface of the high-voltage cable 5. This positions the pan-tilt bracket entirely outside the high-voltage cable 5, enabling the detection equipment to inspect the inside of the high-voltage cable 5. The drive motor 15 is activated, driving the transmission gear 14 to rotate. The transmission gear 14 meshes with the gear ring 10, causing the connecting arm 19 and U-shaped bracket 25 to rotate along the high-voltage cable 5. This causes the imaging plate 17 and X-ray machine 24 to rotate 360° around the high-voltage cable 5 to collect cable data. When different areas of the high-voltage cable 5 need to be inspected, the drive motor 6 is activated, driving the drive wheel to rotate, allowing the device to move longitudinally along the outer surface of the high-voltage cable 5 until the imaging plate 17 and X-ray machine 24 reach the designated inspection area.

[0049] The cable data acquisition module is used to collect the working status data and working environment data of the cable during power transmission. The working status data includes the cable's operating current and operating temperature, which are obtained by a high-frequency current sensor and an infrared temperature sensor, respectively. The working environment data specifically includes the gas concentration in the cable's working environment, which is obtained by a gas concentration sensor. The defect diagnosis module includes a current anomaly analysis unit, a temperature anomaly analysis unit, and a gas anomaly analysis unit. The current anomaly analysis unit calculates the current evaluation coefficient based on the working status data, the temperature anomaly analysis unit calculates the temperature evaluation coefficient based on the working status data, and the gas anomaly analysis unit calculates the concentration evaluation coefficient based on the working environment data. The defect diagnosis module weights and sums the current evaluation coefficient, the concentration evaluation coefficient, and the temperature evaluation coefficient to obtain the comprehensive defect evaluation coefficient.

[0050] The expression for the current evaluation coefficient is as follows: (1); In equation (1), Indicates the current evaluation coefficient; Indicates the operating current of the cable; Indicates the rated current of the cable; This represents the average historical operating current of the cable; This represents the standard deviation of the cable's historical operating current. It is an exponential function; and These are the weighting coefficients. ; Represents absolute value; Equation (1) Part 1 This reflects the degree of deviation of the current from its rated value. The first part reflects the impact of long-term overload or light load on insulation; the second part introduces historical statistical characteristics to characterize the fluctuation intensity of current relative to the historical mean. When the current fluctuation amplitude significantly exceeds the historical standard deviation, this part rapidly approaches the historical mean. This enhances the sensitivity to abnormal operating conditions; after the two parts are weighted and merged, the impact of current factors on cable defects can be assessed more comprehensively.

[0051] The expression for the temperature evaluation coefficient is as follows: ; In equation (2), Indicates the temperature assessment coefficient; and This is the adjustment coefficient; Indicates the operating temperature of the cable; This indicates the maximum temperature threshold at which the cable is safe to operate. It is an exponential function; When the operating temperature T is below the safe threshold When the exponent term is less than 1, the evaluation coefficient is small; when the temperature is close to or exceeds... At that time, the evaluation coefficient showed a non-linear and rapid increase, thus highlighting the risk of insulation degradation under high-temperature conditions; adjustment coefficient Control the growth rate, Used to scale the overall magnitude, making the temperature assessment coefficient It can be compared with other evaluation coefficients (current evaluation coefficients) and concentration assessment coefficient Maintain a reasonable numerical range during the fusion process.

[0052] The calculation process for the concentration assessment coefficient includes the following steps: Step S1: Calculate the first concentration evaluation coefficient based on the gas concentration in the cable's working environment. ; The expression is as follows: (3); In equation (3), This represents the first concentration assessment coefficient; Indicates the first in the cable working environment The weighting coefficients corresponding to the gases ; Indicates the first in the cable working environment The concentration of the gas; Indicates the first in the cable working environment The standard concentrations corresponding to these gases; This indicates the total number of gas types that need to be monitored in the cable's working environment; This indicates a summation operation.

[0053] Equation (3) constructs a comprehensive index reflecting abnormal gas accumulation by combining the concentration deviations of various characteristic gases through weighted summation; when the concentration of a certain gas exceeds its standard threshold, the corresponding value is positive; otherwise, it is negative or zero; the normalized weighting coefficients ensure that the influence ratio of each gas component is reasonable, making the evaluation coefficient... It can accurately reflect abnormal gas release caused by cable defects, such as abnormal gas release caused by partial discharge or overheating, thus providing auxiliary basis for defect diagnosis.

[0054] Step S2: Calculate the second concentration assessment coefficient Its expression is as follows: (4); In equation (4), This represents the second concentration assessment coefficient; Indicates the first in the cable working environment The weighting coefficients corresponding to the gases ; Indicates the first in the cable working environment At any time, a gas The corresponding concentration; Indicates the first in the cable working environment At any time, a gas forward Concentration at that time; Indicates a time period; This represents the summation operation; Equation (4) constructs a comprehensive index reflecting the dynamic trend of gas concentration by calculating the rate of change of each characteristic gas concentration per unit time and then summing the results with weights; this is compared with the first concentration evaluation coefficient. (Focusing on the static deviation of concentration relative to the standard value) is different. Focusing on the rate of concentration change, it can effectively capture the rapid gas release phenomenon caused by sudden partial discharge or accelerated insulation degradation; when the concentration of a certain gas increases significantly in a short period of time, the corresponding value increases, thereby improving the evaluation coefficient value and enhancing the system's sensitivity and response capability to sudden faults.

[0055] Step S3: Evaluate the first concentration coefficient Second concentration evaluation coefficient The concentration assessment coefficient is obtained by weighted summation. ; The defect diagnosis module calculates the comprehensive defect evaluation coefficient by weighting and summing the current evaluation coefficient, concentration evaluation coefficient, and temperature evaluation coefficient, as shown in the following expression: (5); In equation (5), This represents the overall defect assessment coefficient; , and These are the current evaluation coefficient, temperature evaluation coefficient, and concentration evaluation coefficient, respectively. , and These are the weighting coefficients. ; The intelligent early warning module determines whether to issue an early warning based on a comprehensive defect evaluation coefficient. Specifically, when the comprehensive defect evaluation coefficient... When the comprehensive defect assessment coefficient is greater than or equal to the warning threshold, a warning is issued. No warning will be issued if the threshold is not met.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gimbal bracket, characterized in that: It includes a data acquisition device, a first alignment device (3), a second alignment device (4), a guide device (2), and a positioning device (1); The front ends of the first alignment device (3) and the second alignment device (4) are slidably connected; The acquisition equipment includes an imaging plate (17) and a X-ray machine (24). The imaging plate (17) is fixed on the first alignment device (3), and the X-ray machine (24) is fixed on the second alignment device (4). The X-ray machine (24) and the imaging plate (17) detect the high-voltage cable (5). The guide device (2) is set at both ends of the first alignment device (3) and rotates and is sleeved with the first alignment device (3). The guide device (2) drives the first alignment device (3) and the second alignment device (4) and their structures to rotate 360° radially around the high-voltage cable (5) through the meshing of the gear ring (10) and the drive transmission gear (14). The positioning device (1) is installed on the guide device and is provided in multiple sets. The multiple sets of positioning devices (1) are arranged in a ring around the high voltage cable (5). The ends of the hydraulic cylinders (8) on the multiple sets of positioning devices (1) move radially towards the surface of the high voltage cable (5) at the same time, restricting the first alignment device (3) and the second alignment device (4) and the acquisition equipment on the first alignment device (3) and the second alignment device (4) to the high voltage cable (5). The positioning device (1) can drive the first alignment device (3) and the second alignment device (4) and the acquisition equipment on them to travel a long distance longitudinally along the high voltage cable (5) through the drive motor (6) and drive wheel.

2. A gimbal bracket according to claim 1, characterized in that: The first alignment device (3) includes a transmission gear (14), a drive motor (15), a T-shaped arc bracket (16), an imaging plate (17), a side support (18), a connecting arm (19), a guide rod (20), and a side support plate (21). The side support plate (21) is fixedly installed at both ends of the imaging plate (17), the side support (18) is fixedly installed on the side end of the side support plate (21) away from the imaging plate (17), and the connecting arm (19) is fixedly installed on the side support plate (21). The bracket (18) is located near the inner side of the imaging plate (17). The T-shaped arc bracket (16) is fixedly installed on the outer side of the side bracket (18). The guide base rod (20) is fixedly installed on the end of the connecting arm (19) away from the imaging plate (17). The drive motor (15) is fixedly installed on the side end of the side support plate (21) away from the imaging plate (17). The transmission gear (14) is fixedly installed at the center of the side end of the drive motor (15). The transmission gear (14) is driven by the drive motor (15).

3. A gimbal bracket according to claim 2, characterized in that: The second alignment device (4) includes a second bolt (22), a rear support (23), a X-ray machine (24), and a U-shaped support (25). The X-ray machine (24) is fixedly installed inside the rear support (23), and the U-shaped support (25) is fixedly installed at both ends of the rear support (23). The guide rod (20) enters the hollow at the end of the U-shaped support (25), and the second bolt (22) is threaded into the U-shaped support (25) and the guide rod (20).

4. A gimbal bracket according to claim 1, characterized in that: The guide device (2) includes a gear ring (10), a first bolt (11), a mating plate (12), and a support side ring (13). The gear ring (10) is fixedly installed on the side end of the support side ring (13). Both the gear ring (10) and the support side ring (13) are circular. The gear ring (10) and the support side ring (13) are divided into two semi-circular structures. The two ends of the two semi-circular structures are respectively provided with mating plates (12). The mating plates (12) are respectively fixedly installed at the junction of the support side ring (13) and the gear ring (10). The first bolt (11) is threaded into the interior of two sets of adjacent mating plates (12) on different semi-circular structures.

5. A gimbal bracket according to claim 4, characterized in that: The positioning device (1) further includes a connecting base plate (7) and a guide rod (9). The hydraulic cylinder (8) is fixedly installed inside the connecting base plate (7). The drive motor (6) is fixedly installed at one end of the hydraulic cylinder (8). The guide rod (9) is symmetrical and slides through the connecting base plate (7) and is connected to the end of the drive motor (6) near the connecting base plate (7). The connecting base plate (7) is fixedly installed on the side end of the support side ring (13) near the gear ring (10). The connecting base plate (7) is arranged in a ring. The drive wheel is fixedly installed at the end of the drive motor (6) away from the connecting base plate (7).

6. A gimbal bracket according to claim 1, characterized in that: The first alignment device (3) and the second alignment device (4) are respectively symmetrically fixedly installed with a synchronization device (26). The synchronization device (26) includes a nylon brush (28), a round pad (29), a return spring (30), an extension side arm (31), a support sleeve (32), a guide cylinder (33), and an arc sleeve (34). The support sleeve (32) is symmetrically fixedly installed on the side end of the extension side arm (31). The return spring (30) is fixedly installed inside the support sleeve (32). The round pad (29) is fixedly installed at the end of the return spring (30) away from the extension side arm (31). The guide cylinder (33) slides through the support sleeve (32) and is connected to the end of the round pad (29) away from the return spring (30). The arc sleeve (34) is fixedly installed between the two guide cylinders (33). The nylon brush (28) is fixedly installed on the inner side of the arc sleeve (34) away from the guide cylinder (33).

7. A gimbal bracket according to claim 6, characterized in that: The support sleeve (32) has a round hole inside near the arc sleeve (34). The T-shaped guide panel (38) has a slot on the side away from the auxiliary buckle (42). The guide key (41) is connected to the U-shaped bracket (25) and the connecting arm (19) on the side away from the auxiliary buckle (42). A plastic ring (35) is installed at the bottom of the auxiliary buckle (42). The support sleeve (32) is hollow inside. The side of the arc sleeve (34) away from the extension arm (31) is in contact with the outer surface of the high-voltage cable (5).

8. A gimbal bracket according to claim 1, characterized in that: An mounting device (27) is provided on the outside of the first alignment device (3) and the second alignment device (4). The mounting device (27) includes a plastic ring (35), a lower buckle (36), an upper buckle (37), a T-shaped guide panel (38), a top crossbar (39), a handle (40), a guide key (41), and an auxiliary buckle (42). The T-shaped guide panel (38) and the auxiliary buckle (42) are symmetrically fixedly installed at the bottom end of the handle (40), and the auxiliary buckle (42) is located at the bottom end of the T-shaped guide panel (35). Inside the T-shaped guide panel (38), the guide key (41) is symmetrically slidably inserted into the side end of the T-shaped guide panel (38) away from the auxiliary buckle (42). The top crossbar (39) is fixedly installed on the side end of the T-shaped guide panel (38) away from the auxiliary buckle (42). The upper buckle (37) is fixedly installed at the bottom end of the top crossbar (39). The lower buckle (36) is fixedly installed at the bottom end of the upper buckle (37). The plastic ring (35) is fixedly installed on the inner side of the upper buckle (37) and the lower buckle (36) opposite to each other.

9. A high-voltage power cable internal defect diagnosis system, wherein the high-voltage power cable internal defect diagnosis system utilizes the pan-tilt bracket described in any one of claims 1-8 to diagnose internal defects in the high-voltage power cable, characterized in that: It includes a drive module, a cable data acquisition module, a defect diagnosis module, and an intelligent early warning module; The drive module is used to control the drive motor, hydraulic cylinder and drive motor in the gimbal bracket to drive the acquisition device; The cable data acquisition module is used to collect working status data and working environment data of the cable during power transmission. The defect diagnosis module includes a current anomaly analysis unit, a temperature anomaly analysis unit, and a gas anomaly analysis unit. The current anomaly analysis unit calculates a current evaluation coefficient based on the working status data, the temperature anomaly analysis unit calculates a temperature evaluation coefficient based on the working status data, and the gas anomaly analysis unit calculates a concentration evaluation coefficient based on the working environment data. The defect diagnosis module weights and sums the current evaluation coefficient, the concentration evaluation coefficient, and the temperature evaluation coefficient to obtain a comprehensive defect evaluation coefficient. The intelligent early warning module determines whether to issue an early warning based on a comprehensive defect evaluation coefficient.

10. The high-voltage power cable internal defect diagnosis system according to claim 9, characterized in that: The operating status data includes the cable's operating current and operating temperature, which are obtained by a high-frequency current sensor and an infrared temperature sensor, respectively. The working environment data specifically refers to the gas concentration in the working environment of the cable, which is acquired by a gas concentration sensor. The expression for the current evaluation coefficient is as follows: （1）； In equation (1), Indicates the current evaluation coefficient; Indicates the operating current of the cable; Indicates the rated current of the cable; This represents the average historical operating current of the cable; This represents the standard deviation of the cable's historical operating current. It is an exponential function; and These are the weighting coefficients. ; Represents absolute value; The expression for the temperature evaluation coefficient is as follows: （2）； In equation (2), Indicates the temperature assessment coefficient; and This is the adjustment coefficient; Indicates the operating temperature of the cable; This indicates the maximum temperature threshold at which the cable is safe to operate. It is an exponential function; The calculation process for the concentration assessment coefficient includes the following steps: Step S1: Calculate the first concentration evaluation coefficient based on the gas concentration in the cable's working environment. ; Step S2: Calculate the second concentration assessment coefficient ; Step S3: Evaluate the first concentration coefficient Second concentration evaluation coefficient The concentration assessment coefficient is obtained by weighted summation. ; The first concentration evaluation coefficient in step S1 The expression is as follows: (3); In equation (3), This represents the first concentration assessment coefficient; Indicates the first in the cable working environment The weighting coefficients corresponding to the gases ; Indicates the first in the cable working environment The concentration of the gas; Indicates the first in the cable working environment The standard concentrations corresponding to these gases; This indicates the total number of gas types that need to be monitored in the cable's working environment; This represents the summation operation; The second concentration evaluation coefficient in step S2 The expression is as follows: （4）； In equation (4), This represents the second concentration assessment coefficient; Indicates the first in the cable working environment The weighting coefficients corresponding to the gases ; Indicates the first in the cable working environment At any time, a gas The corresponding concentration; Indicates the first in the cable working environment The gas at time forward Concentration at that time; Indicates a time period; This represents the summation operation; In step S3, the defect diagnosis module weights and sums the current evaluation coefficient, concentration evaluation coefficient, and temperature evaluation coefficient to obtain the expression for the comprehensive defect evaluation coefficient, as follows: （5）； In equation (5), This represents the overall defect assessment coefficient; , and These are the current evaluation coefficient, temperature evaluation coefficient, and concentration evaluation coefficient, respectively. , and These are the weighting coefficients. ; The intelligent early warning module determines whether to issue an early warning based on a comprehensive defect evaluation coefficient. Specifically, when the comprehensive defect evaluation coefficient... When the comprehensive defect assessment coefficient is greater than or equal to the warning threshold, a warning is issued. No warning will be issued if the threshold is not met.

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