Power frequency current leakage detection device and method for lightning arrester of power distribution network

Abstract

The invention provides a power frequency current leakage detection device and method for a power distribution network lightning arrester, and relates to the technical field of power distribution network lightning arrester detection.The power distribution network lightning arrester detection device comprises a pedestal, a rotating rod is installed on the pedestal, and the rotating rod is in transmission connection with a driving mechanism; a cylinder is installed on the supporting plate on the periphery of the rotating rod, a sleeving seat is arranged in the cylinder, a telescopic rod is installed in a support on the inner cavity wall of the cylinder, and a current sensing head is installed at one end of the telescopic rod; the pedestal is fixedly provided with a frequency-selecting amplifier, and the frequency-selecting amplifier is electrically connected with the current sensing head. According to the invention, the fine change of the resistive current can be accurately captured, the power frequency current data change when the power distribution network lightning arrester encounters electric breakdown can be accurately identified, and the measurement error is improved, so that the operation phenomenon of missing detection or misjudgment is avoided, meanwhile, the dependence degree of manual operation is reduced, the maintenance cost is further reduced, and the working efficiency is improved. And multi-node synchronous monitoring can be realized, and the operation and maintenance requirements of the power distribution network are fully met.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arrester detection in a distribution network, and in particular discloses a power frequency current leakage detection device and method for a lightning arrester in a distribution network. Background Art

[0002] Distribution network arresters are key devices that protect distribution system equipment from lightning and switching overvoltages. Their core principle is based on nonlinear resistance. During normal operation, they exhibit high impedance, allowing only microampere-level power-frequency current to pass. Once an overvoltage occurs, their impedance drops sharply, rapidly diverting the current to the ground and limiting the residual voltage to within the equipment's tolerance range. Distribution network arresters are typically installed on the incoming line side of a distribution cabinet or on the high-voltage side of a transformer. They are secured vertically at a high location by mounting a base platform on the outside of the distribution cabinet or transformer, ensuring their protective function.

[0003] Distribution network arresters are prone to electrical breakdown failures when exposed to harsh natural environments for extended periods. When this happens, the nonlinear resistors within the arrester experience excessive local current density, causing a sudden drop in insulation performance and a significant increase in leakage current, causing the arrester's power frequency current to exceed normal standard values. To ensure the arrester's ability to protect distribution system equipment, maintenance personnel must promptly identify the fault point after an electrical breakdown occurs. These personnel must use climbing equipment to ascend to the platform where the arrester is located and use external power frequency current detection equipment to identify the fault point.

[0004] The above-mentioned existing technologies have many technical defects. First, it is difficult for power frequency current detection equipment to accurately capture subtle changes in resistive current. When the arrester is operating normally, the resistive component of the leakage current only accounts for 10%-20%, and it is easily drowned out by capacitive current and electromagnetic noise. As a result, the weak distortion of the resistive current in the early stage of aging or local breakdown is difficult to identify, which may result in missed detection or misjudgment. Secondly, traditional power frequency detection requires power outage operation and cannot reflect the dynamic working conditions of the arrester in real time. During live detection, the equipment is easily affected by system harmonics, ambient temperature and humidity, and electromagnetic interference, and the measurement error can reach more than 30%. Thirdly, equipment maintenance and calibration rely on manual operation, which has high maintenance costs and cannot achieve multi-node synchronous monitoring. It is difficult to adapt to the operation and maintenance needs of the wide distribution of distribution networks and large equipment quantities. Summary of the Invention

[0005] In view of the problems that the current power frequency current leakage detection operation has a high misjudgment rate and high maintenance cost when an electrical breakdown fault occurs in a distribution network lightning arrester, the present invention provides a power frequency current leakage detection device and method for a distribution network lightning arrester.

[0006] To solve the above problems, the present invention provides the following technical solutions: The cam is connected to the drive shaft by the spring, and the cam is connected to the drive shaft by the spring, and the cam is connected to the drive shaft by the spring.

[0007] Preferably, the driving mechanism includes a gear fixedly mounted on the end of a transmission rod, an electric push rod is provided on the outside of the gear, the electric push rod is fixedly mounted on a base, a transmission plate is fixedly mounted on the push rod head of the electric push rod, the transmission plate is fastened to a mounting plate, a serrated plate is fixedly mounted inside the mounting plate, and the serrated plate is engaged with the gear transmission.

[0008] Preferably, the electric push rod is arranged perpendicular to the transmission rod, and the electric push rod is arranged parallel to the serrated plate; a reference plate is fixedly mounted on the base, and the reference plate is arranged parallel to the electric push rod, and a groove with an opening facing upward is provided in the reference plate, and the two sides of the bottom end of the serrated plate slide in conjunction with the inner groove wall of the groove.

[0009] Preferably, a protective frame is provided on the periphery of the gear, the protective frame is fastened to the pedestal, and a through slot is provided on the protective frame for the transmission rod to pass through.

[0010] Preferably, a coupling for transmission connection is provided between the rotating rod and the transmission rod, and the coupling is installed in a stabilizing seat. The stabilizing seat is arranged on the outside of the support and is fastened to the base.

[0011] Preferably, the outer periphery of the cylinder is fixedly sleeved with a sleeve plate, the side of the sleeve plate is fixedly connected to a first spring plate, the outer side of the first spring plate is provided with a second spring plate, the first spring plate and the second spring plate are connected by a telescopic spring, a limiting rod is provided inside the telescopic spring, the limiting rod is fastened to the first spring plate, and a circular hole is provided on the second spring plate for the limiting rod to pass through; a rod seat is fixedly installed on the pedestal, a support rod is fixedly installed on the rod seat, and a gasket is fixedly sleeved on the top of the support rod.

[0012] Preferably, a shell is fixedly installed on the bottom of the support plate, and a square groove is opened on the base to facilitate the passage of the shell; a shaft is rotatably installed in the support plate, the top end of the shaft is tightly connected to the socket, and the bottom end of the shaft is fixedly sleeved with a first pulley, a servo motor is fixedly installed on the outside of the shell, and the output shaft of the servo motor is tightly sleeved with a second pulley, and the second pulley is arranged inside the shell and is driven by a rubber belt with the first pulley.

[0013] Preferably, the socket is a truncated cone structure, and the diameter of the bottom end of the socket is smaller than the inner diameter of the cylinder.

[0014] Preferably, a stepped groove is provided on the inner side of the top end of the cylinder, and a rubber ring is provided on the stepped groove, and the rubber ring is interference-fitted with the distribution network arrester.

[0015] On the other hand, the present invention also provides a power frequency current leakage detection method for a distribution network lightning arrester, comprising the following steps: S1. The current sensor transmits the real-time detected power frequency current value to the frequency selective amplifier, which then transmits the data to the terminal control device. S2. When a lightning arrester in the distribution network experiences an electrical breakdown fault, the current sensor head transmits the abnormal power frequency current data to the terminal control device after amplification by a frequency-selective amplifier. The terminal device then controls and activates the servo motor, rotating the shaft, which in turn causes the socket to rotate the arrester within its cylinder. The terminal device then analyzes the power frequency current detection data to determine the damage location of the arrester. S3. The terminal control device controls and starts the electric push rod, causing the serrated plate to slide in the groove of the reference plate, causing the gear to drive the rotating rod to rotate, thereby flipping the support plate and placing the distribution network lightning arrester in the cylinder horizontally to facilitate maintenance and replacement of the distribution network lightning arrester.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by providing a transmission structure of a rotating rod and a transmission rod, the driving mechanism can output a driving force to the rotating rod, so that the rotating rod can drive the support plate to flip on the pedestal, and the distribution network lightning arrester can be stably loaded on the support plate with the help of the socket and the cylinder. By providing a transmission structure of a servo motor and a shaft rod, the distribution network lightning arrester can be rotated in the inner cavity of the cylinder, thereby cooperating with the current sensor head to perform all-round power frequency current leakage detection on the outer wall of the distribution network lightning arrester, so that the power frequency current value detected by the current sensor head is amplified and transmitted to the terminal equipment through the frequency selective amplifier to cooperate with the maintenance personnel to perform precise maintenance operations on the distribution network lightning arrester; the present invention can accurately capture subtle changes in resistive current, accurately identify changes in power frequency current data when the distribution network lightning arrester encounters electrical breakdown, improve measurement errors, and thus avoid the occurrence of missed detection or misjudgment. At the same time, the present invention reduces the dependence on manual operation, further reduces maintenance costs, and can realize multi-node synchronous monitoring, fully adapting to the operation and maintenance needs of the distribution network, and therefore has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the present invention, the following briefly introduces the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts. Figure 1 Schematic diagram of the structure of the detection device of the present invention; Figure 2 This is a schematic diagram of the support plate and sleeve plate installation structure of the present invention; Figure 3 Schematic diagram of the specific structure of the driving mechanism of the present invention; Figure 4 It is a schematic diagram of the protective frame structure of the present invention; Figure 5 This is a schematic diagram of the rod base installation structure of the present invention; Figure 6 It is a schematic diagram of the cylinder installation structure of the present invention; Figure 7 This is a schematic diagram of the installation structure of the telescopic spring of the present invention; Figure 8 Schematic diagram of the transmission structure of the first pulley and the second pulley of the present invention; Figure 9 This is a schematic diagram of the rubber ring arrangement structure of the present invention; Figure 10 This is a schematic diagram of the current sensor head arrangement structure of the present invention; In the figure: 1. Base, 2. Support, 3. Rotating rod, 4. Transmission rod, 5. Driving mechanism, 501. Gear, 502. Electric push rod, 503. Transmission plate, 504. Mounting plate, 505. Serrated plate, 506. Reference plate, 507. Groove, 6. Support plate, 7. Cylinder, 8. Socket, 9. Bracket, 10. Telescopic rod, 11. Current sensor head, 12. Frequency-selective amplifier, 13. Protective frame, 14. Through slot, 15. Coupling, 16. Stabilizing seat, 17. Sleeve plate, 18. First spring plate, 19. Second spring plate, 20. Telescopic spring, 21. Limit rod, 22. Round hole, 23. Rod seat, 24. Support rod, 25. Gasket, 26. Housing, 27. Square slot, 28. Shaft, 29. First pulley, 30. Servo motor, 31. Second pulley, 32. Rubber belt, 33. Step groove, 34. Rubber ring. DETAILED DESCRIPTION

[0018] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] This specific embodiment provides a power frequency current leakage detection device for a lightning arrester in a distribution network, such as Figures 1-10 As shown, it includes a pedestal 1, which is composed of four legs at the bottom and a top plate. Two supports 2 are fixedly mounted on the top plate of the pedestal 1. The bottoms of the two supports 2 are both tightly connected to the pedestal 1. A rotating rod 3 is provided between the two supports 2. The two ends of the rotating rod 3 are rotatably mounted inside the two supports 2 and rotate with them. A stabilizing seat 16 is provided on the outside of one of the supports 2. The bottom of the stabilizing seat 16 is tightly connected to the top plate of the pedestal 1. A coupling 15 is installed in the stabilizing seat 16. A transmission rod 4 that rotates and cooperates is provided on the side of the stabilizing seat 16. The rotating rod 3 and the transmission rod 4 are connected by transmission via the coupling 15.

[0020] The end of the transmission rod 4 away from the rotating rod 3 is connected to a drive mechanism 5. The drive mechanism 5 includes a gear 501 fixedly mounted on the end of the transmission rod 4 away from the rotating rod 3. The gear 501 can rotate with the transmission rod 4. An electric push rod 502 is provided on the outside of the gear 501. The outer shell of the electric push rod 502 is fixedly mounted on the pedestal 1. A push rod is provided inside the electric push rod 502. A transmission plate 503 is fixedly mounted on the push rod head of the electric push rod 502. The transmission plate 503 is fastened to a mounting plate 504. The mounting plate 504 is arranged between the electric push rod 502 and the stabilizing seat 16 and has a clearance fit with the pedestal 1. A serrated plate 505 is fixedly mounted inside the mounting plate 504. The serrated plate 505 has a plurality of evenly arranged serrated grooves therein. The serrated grooves match the tooth grooves of the gear 501, thereby enabling the serrated plate 505 to engage with the gear 501.

[0021] The electric push rod 502 is arranged perpendicular to the transmission rod 4 and parallel to the serrated plate 505. A reference plate 506 is fixedly mounted on the pedestal 1. The reference plate 506 is arranged parallel to the electric push rod 502 and has an upwardly facing groove 507 defined therein. The bottom sides of the serrated plate 505 slide with the inner groove walls of the groove 507, providing a sliding support structure for the serrated plate 505, thereby increasing the transmission stability of the serrated plate 505. Furthermore, a protective frame 13 is provided around the periphery of the gear 501. The bottom end of the protective frame 13 is securely connected to the platform of the pedestal 1 and is arranged between the reference plate 506 and the stabilizing seat 16. A through-slot 14 is defined on the side of the protective frame 13 near the stabilizing seat 16 to facilitate the passage of the transmission rod 4, thereby protecting the transmission structure of the gear 501 and the serrated plate 505.

[0022] A support plate 6 is mounted on the periphery of the rotating rod 3. One end of the support plate 6 is tightly mounted on the rotating rod 3 and can be flipped along with the rotating rod 3. A rod seat 23 is provided at the bottom of the other end of the support plate 6. There are multiple rod seats 23 and they are all tightly connected to the base 1. A vertically arranged support rod 24 is fixedly mounted on each rod seat 23. A gasket 25 is fixedly mounted on the top of each support rod 24. The gasket 25 can contact the bottom of the support plate 6, so that the support rod 24 provides a stable support structure for the support plate 6.

[0023] A cylinder 7 is fixedly mounted on the support plate 6, and the cylinder 7 is a cylindrical structure with an opening facing upward; a sleeve 17 is fixedly sleeved on the periphery of the cylinder 7, and a plurality of first spring plates 18 are fixedly connected to the plate surface of the sleeve 17 close to the rotating rod 3. A second spring plate 19 is provided on the outer side of the first spring plate 18, and the first spring plate 18 and the second spring plate 19 are connected by a telescopic spring 20. A limiting rod 21 is provided inside the telescopic spring 20, and the initial position of the limiting rod 21 is arranged perpendicular to the support rod 24. The end of the limiting rod 21 close to the sleeve 17 is fastened to the first spring plate 18, and a circular hole 22 is opened on the second spring plate 19, and the end of the limiting rod 21 away from the sleeve 17 can pass through the circular hole 22, so that when the second spring plate 19 contacts the base 1, the limiting rod 21 limits the minimum telescopic amount of the telescopic spring 20.

[0024] A shaft 28 is rotatably mounted inside the support plate 6, and the top end of the shaft 28 is arranged inside the cylinder 7 and fixedly connected to a socket 8; the socket 8 is a truncated cone-shaped structure, and the bottom end diameter of the socket 8 is smaller than the inner diameter of the cylinder 7, thereby facilitating the fixed loading of the power distribution network arrester, so that the bottom end of the power distribution network arrester is tightly sleeved on the socket 8. The bottom end of the shaft 28 is arranged at the bottom of the support plate 6 and is fixedly sleeved with a first pulley 29, and a servo motor 30 is fixedly mounted on the outside of the housing 26, and the output shaft of the servo motor 30 is tightly sleeved with a second pulley 31, which is arranged inside the housing 26 and is driven by a rubber belt 32 with the first pulley 29, so that the socket 8 rotates inside the cylinder 7, thereby rotating the power distribution network arrester inside the cylinder 7.

[0025] A bracket 9 is fixedly mounted on the inner wall of the cylinder 7. The bracket 9 has a mounting slot, and a telescopic rod 10 is fixedly mounted in the mounting slot. A current sensor head 11 is fixedly mounted on the end of the telescopic rod 10 facing the socket 8. The current sensor head 11 contacts the outer wall of the distribution network lightning arrester and detects the power frequency current value in real time. A frequency-selective amplifier 12 is fixedly mounted on the base 1. The frequency-selective amplifier 12 is electrically connected to the current sensor head 11 via a data bus. The frequency-selective amplifier 12 can transmit data to an external terminal control device via the data bus, thereby amplifying the detection data of the current sensor head 11 and transmitting it to the terminal control device.

[0026] In addition, a stepped groove 33 is provided on the inner side of the top of the cylinder 7, and the stepped groove 33 is arranged on the outside of the distribution network lightning arrester. A rubber ring 34 is provided on the stepped groove 33, and the rubber ring 34 is interference fit with the distribution network lightning arrester, thereby preventing dust and impurities in the external environment from entering the cylinder 7.

[0027] The above describes in detail an embodiment of a power frequency current leakage detection device for a distribution network lightning arrester. Based on the power frequency current leakage detection device described in the above embodiment, an embodiment of the present invention also provides a power frequency current leakage detection method corresponding to the device, including the following steps: S1. The current sensor head 11 transmits the real-time detected power frequency current value to the frequency selective amplifier 12. The frequency selective amplifier 12 filters and amplifies the power frequency current measured by the current sensor head 11. The frequency selective amplifier 12 transmits data to the terminal control device, thereby converting the filtered and amplified data into a digital signal recognizable by the terminal control device, allowing the terminal control device to coordinate the operation of the entire device. S2. When an electrical breakdown occurs in a distribution network lightning arrester, the current sensor head 11 transmits the abnormal power frequency current data to the terminal control device after amplification by the frequency selective amplifier 12. The terminal device then controls and activates the servo motor 309. The output shaft of the servo motor 309, coordinated by the first pulley 29 and the second pulley 31, rotates the shaft 28, causing the socket 8 to rotate the distribution network lightning arrester within the cylinder 7. The terminal device then analyzes the power frequency current detection data to determine the damage location of the distribution network lightning arrester. S3. After the damaged position of the distribution network arrester is determined, the terminal control device controls and starts the electric push rod 502, causing the serrated plate 505 to slide in the groove 507 of the reference plate 506, so that the gear 501 drives the transmission rod 4 to rotate, thereby rotating the rotating rod 3, flipping the support plate 6, and under the cooperation of the first spring plate 18 and the second spring plate 19, the base 1 stably supports the flipped support plate 6, so that the distribution network arrester in the cylinder 7 is arranged horizontally to facilitate the maintenance and replacement of the distribution network arrester.

[0028] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power frequency current leakage detection device for a distribution network lightning arrester, comprising a base (1), characterized in that: Two supports (2) are fixedly mounted on the pedestal (1), a rotating rod (3) is rotatably mounted between the two supports (2), the rotating rod (3) is transmission-connected to a transmission rod (4), and a driving mechanism (5) for driving the transmission rod (4) to rotate is mounted on the pedestal (1); a support plate (6) is sleeved on the periphery of the rotating rod (3), a cylinder (7) is fixedly mounted on the support plate (6), a socket seat (8) that rotatably cooperates with the support plate (6) is provided inside the cylinder (7), the socket seat (8) is fastened to the bottom end of the distribution network arrester, and the cylinder (7) A bracket (9) is fixedly mounted on the inner cavity wall, a telescopic rod (10) is fixedly mounted in the bracket (9), a current sensing head (11) is fixedly mounted on one end of the telescopic rod (10) facing the socket (8), the current sensing head (11) contacts the outer wall of the distribution network lightning arrester and detects the power frequency current value in real time; a frequency selective amplifier (12) is fixedly mounted on the pedestal (1), the frequency selective amplifier (12) is electrically connected to the current sensing head (11), and the frequency selective amplifier (12) is used to amplify and transmit the power frequency current value detected by the current sensing head (11).

2. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 1, characterized in that: The driving mechanism (5) comprises a gear (501) fixedly mounted on the end of a transmission rod (4); an electric push rod (502) is provided on the outer side of the gear (501); the electric push rod (502) is fixedly mounted on the pedestal (1); a transmission plate (503) is fixedly mounted on the push rod head of the electric push rod (502); the transmission plate (503) is fastened to a mounting plate (504); a sawtooth plate (505) is fixedly mounted inside the mounting plate (504); the sawtooth plate (505) is in transmission meshing engagement with the gear (501).

3. The power frequency current leakage detection device for a distribution network lightning arrester according to claim 2, characterized in that: The electric push rod (502) is arranged perpendicularly to the transmission rod (4), and the electric push rod (502) is arranged parallel to the sawtooth plate (505); a reference plate (506) is fixedly mounted on the pedestal (1), and the reference plate (506) is arranged parallel to the electric push rod (502); a groove (507) with an opening facing upward is provided in the reference plate (506), and both sides of the bottom end of the sawtooth plate (505) are slidably engaged with the inner groove wall of the groove (507).

4. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 2, characterized in that: A protective frame (13) is provided on the periphery of the gear (501), the protective frame (13) is fastened to the pedestal (1), and a through slot (14) is provided on the protective frame (13) for the transmission rod (4) to pass through.

5. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 1, characterized in that: A coupling (15) for transmission connection is provided between the rotating rod (3) and the transmission rod (4), and the coupling (15) is installed in a stabilizing seat (16). The stabilizing seat (16) is arranged outside the support (2) and is firmly connected to the pedestal (1).

6. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 1, characterized in that: A sleeve plate (17) is fixedly sleeved on the periphery of the cylinder (7), a first spring plate (18) is fixedly connected to the side of the sleeve plate (17), a second spring plate (19) is arranged on the outer side of the first spring plate (18), the first spring plate (18) and the second spring plate (19) are connected via a telescopic spring (20), a limiting rod (21) is arranged inside the telescopic spring (20), the limiting rod (21) is fastened to the first spring plate (18), and a circular hole (22) is provided on the second spring plate (19) for the limiting rod (21) to pass through; a rod seat (23) is fixedly mounted on the pedestal (1), a support rod (24) is fixedly mounted on the rod seat (23), and a gasket (25) is fixedly sleeved on the top of the support rod (24).

7. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 1, characterized in that: A housing (26) is fixedly mounted on the bottom of the support plate (6), and a square groove (27) is provided on the pedestal (1) for the housing (26) to pass through. A shaft (28) is rotatably mounted in the support plate (6), the top end of the shaft (28) is tightly connected to the socket (8), and the bottom end of the shaft (28) is fixedly sleeved with a first pulley (29). A servo motor (30) is fixedly mounted on the outside of the housing (26), and the output shaft of the servo motor (30) is tightly sleeved with a second pulley (31). The second pulley (31) is arranged inside the housing (26) and is driven by a rubber belt (32) and cooperates with the first pulley (29).

8. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 1, characterized in that: The sleeve seat (8) is a truncated cone-shaped structure, and the diameter of the bottom end of the sleeve seat (8) is smaller than the inner diameter of the cylinder (7).

9. The power frequency current leakage detection device for a lightning arrester in a distribution network according to claim 1, characterized in that: A stepped groove (33) is provided on the inner side of the top end of the cylinder (7), and a rubber ring (34) is provided on the stepped groove (33). The rubber ring (34) is interference-fitted with the distribution network arrester.

10. A power frequency current leakage detection method for a lightning arrester in a distribution network, according to the power frequency current leakage detection device according to any one of claims 1 to 9, characterized in that: The method comprises: S1. The current sensor head (11) transmits the real-time detected power frequency current value to the frequency selective amplifier (12), and the frequency selective amplifier (12) transmits data to the terminal control device; S2. When an electrical breakdown fault occurs in the distribution network lightning arrester, the current sensor head (11) amplifies the abnormal power frequency current data through the frequency selective amplifier (12) and transmits it to the terminal control device. The terminal device controls and starts the servo motor (309), causing the shaft (28) to rotate, causing the socket (8) to drive the distribution network lightning arrester to rotate in the cylinder (7), and obtains the damage position of the distribution network lightning arrester by analyzing the power frequency current detection data; S3. The terminal control device controls and starts the electric push rod (502), causing the sawtooth plate (505) to slide in the groove (507) of the reference plate (506), causing the gear (501) to drive the rotating rod (3) to rotate, thereby flipping the support plate (6) and placing the distribution network lightning arrester in the cylinder (7) horizontally to facilitate maintenance and replacement of the distribution network lightning arrester.

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