Lightning arrester on-line monitoring method and device

Abstract

The invention provides a lightning arrester on-line monitoring method and device, and relates to the technical field of lightning arrester monitoring equipment, and the detection device comprises a signal feedback assembly, a current monitoring assembly and a separation assembly. The detection method comprises the following steps: S1, fixing the mounting plate on the support frame and enabling the mounting plate to be adjacent to the corresponding lightning arrester; s2, fixing the monitoring device on the mounting plate; s3, a signal feedback assembly in the monitoring device is connected with an external receiver of a ground control room through a wire; s4, adjusting an adjusting assembly in the monitoring device; s5, supplying power to the lightning arrester system; s6, monitoring parameters are set or calibrated according to actual conditions; through arrangement of the rotating rod, the piston rod, the electromagnetic coil and the like, when leakage current of the lightning arrester is overlarge, the middle cylinder moves to a separation area, and the service life of the pointer is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of arrester monitoring equipment, and in particular to an arrester online monitoring method and device. Background Art

[0002] The arrester online monitor is an instrument used in conjunction with zinc oxide arresters in high-voltage AC power systems. The instrument is connected in series in the arrester grounding loop. The milliammeter in the monitor is used to monitor the leakage current (peak value) passing through the arrester under the operating voltage. It can determine whether the inside of the arrester is damp or whether the components are abnormal; the action counter records the number of overvoltage actions of the arrester.

[0003] A Chinese patent with application number CN202311751917.0 discloses a six-phase combined lightning arrester operation status monitoring device and installation method, including a lightning arrester main body and a monitoring component, the monitoring device also includes a base and a connecting component; a six-phase lightning arrester main body is arranged on the top of the base; the monitoring component is arranged inside the base, one end of the connecting component is connected to the monitoring component, and the other end passes through the top surface of the base and is movably connected to one of the phases of the lightning arrester main body; a protective component for shielding the connection part between the lightning arrester main body and the connecting component is arranged at the lower part of the lightning arrester main body; a pressing device for fixing the monitoring component is arranged inside the base, which can safely protect the connection parts between the operation monitoring devices of each phase lightning arrester to avoid exposure to the air, reduce the risk of causing excessive local discharge, and improve safety performance.

[0004] A Chinese patent with application number CN202211229377.5 discloses a lightning arrester monitoring device, including a monitor housing, a counting and display module integrated on the monitor housing, and a communication module and a power supply module installed in the housing; wherein the communication module is communicatively connected to a background server for transmitting monitored current data; the power supply module includes a photovoltaic cell unit arranged outside the monitor housing and a battery unit arranged in the housing, and the photovoltaic cell unit is used to absorb solar energy and convert it back into electrical energy, and then transmit the electrical energy to the battery unit for storage, and the battery unit is used to power the electrical elements in the device. The lightning arrester monitoring device proposed in this invention has higher accuracy than the existing pointer display.

[0005] However, the above-mentioned arrester monitoring device still has the following problems: 1. When the internal materials of the arrester are aged, or the surface of the arrester is exposed to dust, salt spray or is in a high humidity environment, its external insulation performance is affected, resulting in changes in leakage current or even irregular peak changes. Excessive current causes the pointer to move quickly or suddenly impact the limit position of the dial. In this case, mechanical stress is generated on the pointer itself or its connecting mechanism, causing the pointer to bend or break, greatly reducing the service life of the monitor.

[0006] 2. When the electromagnetic principle is used to protect the pointer from disengagement, the piston rod will move after the current passing through the coil exceeds a certain threshold. However, sometimes it is necessary to monitor and warn of different leakage current peaks of the lightning arrester. At this time, it is troublesome to replace different monitors. Summary of the invention

[0007] In view of the above problems, the present invention provides a method and device for online monitoring of a lightning arrester, which has the advantages of remote feedback of alarm signals, pointer separation protection, and higher universality of the monitoring device.

[0008] The technical solution is to provide an online monitoring device for a lightning arrester, comprising a support frame, a lightning arrester, a mounting plate and a sensor terminal, wherein the angle between the mounting plate and the support frame is an obtuse angle, and further comprising a shell, which is fixedly connected to the mounting plate and has an open cylindrical structure at one end; a cover plate, which is fixedly connected to the opening of the shell; a pointer, which is arranged on a side of the shell away from the cover plate; a dial, which is arranged on a side of the shell away from the cover plate; the sensor terminal and the grounding terminal are respectively fixedly connected to the cover plate; a signal feedback component, which is arranged in the shell; a current monitoring component, which is arranged in the shell, and the current monitoring component is respectively connected to the sensor terminal and the grounding terminal for electrical signals; the current monitoring component comprises a receiving plate fixed in the shell, and the receiving plate A horseshoe-shaped magnet is arranged on the plate, and symmetrically distributed pole shoes are arranged on both sides of the opening of the horseshoe-shaped magnet, an iron core is arranged between the two pole shoes, a positioning plate is fixed on the receiving plate, a connecting shaft is coaxially fixed on the end of the iron core close to it, and the end of the connecting shaft away from the iron core is fixedly connected to the positioning plate, a frame is rotatably connected to the connecting shaft, an energized coil is wound on the frame, and a rotating shaft is fixedly connected to the end of the frame away from the connecting shaft, a rotating rod coaxially arranged with the rotating shaft is rotatably connected to the shell, and the pointer is fixedly connected to the rotating rod; a disengagement component is arranged in the current monitoring component, and when the peak value of the leakage current exceeds the threshold value, the disengagement component causes the pointer to disengage from the current monitoring component to prevent the pointer from moving rapidly or suddenly impacting the extreme position of the dial.

[0009] Preferably, the disengagement assembly includes an intermediate cylinder coaxially sleeved with the rotating rod and the rotating shaft, the rotating shaft is provided with a card slot, and a card block matching the card slot is fixedly connected to the inner wall of the intermediate cylinder, the rotating rod includes a disengagement area and a connection area, the connection area is provided with a connection groove consistent with the axis direction of the rotating rod, and a connection block matching the connection groove is fixedly connected to the inner wall of the intermediate cylinder, when the intermediate cylinder moves to the side away from the rotating rod, the connection block moves from the connection area to the disengagement area, and at this time, the rotation of the rotating shaft no longer drives the rotating rod to rotate.

[0010] Preferably, the diameter of the separation zone is smaller than the diameter of the connection zone, and the connection between the connection zone and the separation zone is arranged as an inclined surface.

[0011] Preferably, the disengagement assembly also includes a fixed rod fixedly connected to the inner wall of the outer shell, a piston rod is coaxially slidably arranged on the fixed rod, the piston rod is made of ferromagnetic material, a step block is provided on the piston rod, a connecting plate is coaxially sleeved on the side of the piston rod away from the step block, the connecting plate is fixedly connected to the inner wall of the outer shell, an elastic member is provided between the step block and the connecting plate, a connecting strip is fixedly connected to one end of the piston rod away from the step block, a connecting disk is coaxially provided on the intermediate cylinder, and an end of the connecting strip away from the piston rod is slidably connected to the connecting disk.

[0012] Preferably, a mounting cylinder coaxial with the piston rod is fixedly connected to the inner wall of the shell, an electromagnetic coil is arranged in the mounting cylinder, and two ends of the electromagnetic coil are respectively connected to the sensing terminal and the energized coil to form a series circuit.

[0013] Preferably, it also includes an adjusting component, which includes an adjusting rod rotatably connected to the cover plate, the adjusting rod is located below the piston rod, an adjusting thread is provided at one end of the adjusting rod close to the piston rod, an adjusting ring matching the adjusting thread is provided on the adjusting rod, an annular groove is provided on the adjusting ring, and the outer edge of the connecting plate is located inside the annular groove; when the adjusting rod rotates, the adjusting ring moves on the adjusting rod and drives the connecting plate to move on the piston rod, and at this time the compression amount of the elastic member changes.

[0014] Preferably, the cover plate is provided with a dial coaxially arranged with the adjusting rod, the pitch of the adjusting thread matches the dial, a handle is coaxially fixed to the end of the adjusting rod, and an indicating arrow is provided on the handle.

[0015] Preferably, the signal feedback component includes a first contact piece arranged at the bottom of the receiving plate, a second contact piece is arranged on the connecting strip, the first contact piece and the second contact piece are electrically connected to an external receiver through a wire, and the external receiver is provided with a signal feedback unit, a display unit and a memory unit; when the piston rod moves so that the second contact piece contacts the first contact piece, the external receiver will receive an action signal, and the external receiver will send an alarm signal to the user and record it.

[0016] Preferably, the signal feedback unit includes a signal light and a buzzer, and the display unit includes a display.

[0017] The present invention also discloses a method for online monitoring of a lightning arrester, comprising the following steps: S1. Fix the mounting plate on the support frame and adjacent to the corresponding lightning arrester; S2. Fix the monitoring device on the mounting plate and connect the sensing terminal of the monitoring device to the grounding line of the arrester. The grounding terminal is grounded to the reference point of the grounding wire or directly grounded. S3, connecting the signal feedback component in the monitoring device to the external receiver in the ground control room through a wire; S4. Adjust the regulating components in the monitoring device to monitor different leakage current peak values; S5. Power the arrester system and check the readings on the monitor; S6. Set or calibrate monitoring parameters according to actual conditions.

[0018] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects: 1. During the process of executing protective disengagement on the pointer, each time the disengagement action is executed, a signal will be sent to the ground control room and the alarm signal will be recorded, reducing the dependence on patrol work. Even if it is inconvenient for staff to patrol in extreme weather, the ground control room can receive the alarm information. The staff can also view the number of alarms during the working cycle of the lightning arrester through the display to determine the possible fault problems of the lightning arrester.

[0019] 2. Through the settings of the rotating rod, the intermediate cylinder, the piston rod and the electromagnetic coil, whenever the leakage current of the arrester is too large, the torque generated by the electromagnetic coil will drive the piston rod to break through the restriction of the elastic part, thereby driving the intermediate cylinder to move to the disengagement area, preventing the pointer from moving quickly or suddenly impacting the extreme position of the dial, thereby increasing the service life of the pointer.

[0020] 3. Through the settings of adjusting rods, adjusting threads, adjusting rings and connecting plates, the monitoring device can alarm according to different peak values ​​of leakage current. The greater the compression of the spring, the greater the torque required for the piston rod and the greater the required leakage current. Conversely, when a smaller peak value of the leakage current occurs, the piston rod can move. This setting makes the monitoring device more versatile and more universal. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0022] Figure 2 It is a three-dimensional schematic diagram of the mounting plate and the monitoring device in the present invention.

[0023] Figure 3 It is a three-dimensional schematic diagram of the cover plate in the present invention.

[0024] Figure 4 It is a partial cross-sectional view of the monitoring device in the present invention.

[0025] Figure 5 The present invention Figure 4 A schematic diagram of the enlarged structure at point A in the middle.

[0026] Figure 6 It is a plan cross-sectional view of the monitoring device in the present invention.

[0027] Figure 7 The present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0028] Figure 8 It is a schematic diagram of the cooperation between the rotating shaft and the intermediate cylinder in the present invention.

[0029] Fig. 9 It is a schematic diagram of the separation zone and the connection zone in the present invention.

[0030] Fig.10 It is an exploded schematic diagram of the separation component in the present invention.

[0031] Fig.11 It is a three-dimensional schematic diagram of the adjustment component in the present invention.

[0032] Explanation of the symbols in the schematic diagram: 1. Support frame; 2. Lightning arrester; 3. Mounting plate; 4. Sensing terminal; 5. Shell; 6. Cover plate; 7. Pointer; 8. Dial; 9. Adapter plate; 10. Horseshoe magnet; 11. Pole shoe; 12. Iron core; 13. Positioning plate; 14. Connecting shaft; 15. Frame; 16. Power-carrying coil; 17. Rotating shaft; 18. Rotating rod; 19. Intermediate cylinder; 20. Slot; 21. Block; 22. Disengagement area; 23. Connecting area; 24. Connecting slot; 25. Connecting block; 26. Fixed rod; 27. Piston rod; 28. Step block; 29. ​​Connecting plate; 30. Elastic piece; 31. Connecting strip; 32. Connecting plate; 33. Mounting cylinder; 34. Electromagnetic coil; 35. Adjusting rod; 36. Adjusting ring; 37. Dial; 38. Handle; 39. First contact piece; 40. Second contact piece. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] refer to Figure 1 and Figure 2As shown, when using the arrester 2 online monitor to monitor the operating status of the arrester 2, the inspection personnel can observe the leakage current value of the arrester 2 through the pointer 7 on the monitor, and the action counter can record the number of times the leakage current of the detector exceeds the threshold. However, the alarm mode of the monitor mostly uses a signal light display, which has no feedback to the control room and is more dependent on the inspection work. In view of the above problems, a method for online monitoring of the arrester is proposed in this embodiment, including the following steps: S1. Fix the mounting plate 3 on the support frame 1 and adjacent to the corresponding lightning arrester 2.

[0035] S2. Fix the monitoring device on the mounting plate 3, and connect the sensing terminal 4 of the monitoring device to the grounding line of the lightning arrester 2. The grounding terminal is connected to the grounding wire reference point or directly grounded.

[0036] S3. Connect the signal feedback component in the monitoring device to the external receiver in the ground control room through a wire.

[0037] S4. Adjust the regulating components in the monitoring device to monitor different leakage current peak values.

[0038] S5. Power the arrester 2 system and check the readings displayed on the monitor.

[0039] S6. Set or calibrate monitoring parameters according to actual conditions.

[0040] Compared with the traditional online monitoring device of the lightning arrester 2, during the process of executing the protection disengagement of the pointer 7, this embodiment will send a signal to the ground control room and record the alarm signal each time the disengagement action is executed, thereby reducing the dependence on patrol work. Even if it is inconvenient for staff to patrol in extreme weather, the ground control room can still receive the alarm information.

[0041] When the internal material of the arrester 2 ages, or the surface of the arrester 2 is exposed to dust, smoke or high humidity, its external insulation performance is affected, resulting in changes in leakage current, or even irregular peak changes. Excessive current causes the pointer 7 to move quickly or suddenly impact the limit position of the dial 37. In this case, mechanical stress is generated on the pointer 7 itself or its connecting mechanism, which causes the pointer 7 to bend or break, greatly reducing the service life of the monitor. In view of the above problems, based on the above embodiments, this embodiment proposes an online monitoring device for a lightning arrester.

[0042] refer to Figures 1 to 11As shown, the monitoring device includes a shell 5 fixedly connected to the mounting plate 3, the angle between the mounting plate 3 and the support frame 1 is an obtuse angle, in this embodiment, the angle is 135 degrees, which is convenient for inspection personnel to observe the monitoring device, the shell 5 is a cylindrical structure with an opening at one end, and a cover plate 6 is fixedly connected to the opening of the shell 5, the cover plate 6 and the shell 5 are fixed by multiple groups of bolts, a pointer 7 and a dial 8 are provided on the side of the shell 5 away from the cover plate 6, the sensor terminal 4 and the grounding terminal are respectively fixedly connected to the cover plate 6, a current monitoring component is provided in the shell 5, and the current monitoring component is respectively connected to the sensor terminal 4 and the grounding terminal electrical signal, the above are all prior arts, no more details are given here, and the common lightning arrester 2 operation monitor can be directly referred to.

[0043] When the leakage current of the arrester 2 forms a complete circuit through the sensing terminal 4 , the current monitoring component and the grounding terminal, the current monitoring component controls the pointer 7 to rotate and displays the corresponding current value on the dial 8 .

[0044] A disengagement component is provided in the current monitoring component. When the peak value of the leakage current exceeds the threshold value, the disengagement component disengages the pointer 7 from the current monitoring component to prevent the pointer 7 from moving quickly or suddenly impacting the extreme position of the dial 37.

[0045] To further supplement the structure of the current monitoring component, the current monitoring component includes a receiving plate 9 fixed in the housing 5, a horseshoe magnet 10 is arranged on the receiving plate 9, and symmetrically distributed pole shoes 11 are arranged on both sides of the opening of the horseshoe magnet 10, an iron core 12 is arranged between the two pole shoes 11, a positioning plate 13 is fixed on the receiving plate 9, a connecting shaft 14 is coaxially fixed to the end close to the iron core 12, and the end of the connecting shaft 14 away from the iron core 12 is fixedly connected to the positioning plate 13, a frame 15 is rotatably connected to the connecting shaft 14, a power-carrying coil 16 is wound on the frame 15, and the frame 15 is away from the connecting shaft 14. One end of the connecting shaft 14 is fixedly connected to a rotating shaft 17, and a rotating rod 18 coaxially arranged with the rotating shaft 17 is rotatably connected to the shell 5. The rotating rod 18 and the connecting shaft 14 are both provided with a coil spring as a damping device. The pointer 7 is fixedly connected to the rotating rod 18. When the energized coil 16 is energized, according to Ampere's law, the energized coil is equivalent to a small electromagnet, which interacts with the surrounding fixed magnetic field to generate a torque that rotates the coil. The magnitude of the torque is proportional to the current passing through the coil. The above structure is the prior art of the ammeter, and the structure of the ammeter can be directly referred to, and no further details will be given here.

[0046] To further supplement the structure of the disengagement assembly, the disengagement assembly includes an intermediate cylinder 19 coaxially sleeved with the rotating rod 18 and the rotating shaft 17, a card slot 20 is provided on the rotating shaft 17, and a card block 21 matching the card slot 20 is fixedly connected to the inner wall of the intermediate cylinder 19. The rotating rod 18 includes a disengagement area 22 and a connection area 23. The connection area 23 is provided with a connection groove 24 consistent with the axial direction of the rotating rod 18, and a connection block 25 matching the connection groove 24 is fixedly connected to the inner wall of the intermediate cylinder 19. When the intermediate cylinder 19 moves to the side away from the rotating rod 18, the connection block 25 moves from the connection area 23 to the disengagement area 22. At this time, the rotation of the rotating shaft 17 no longer drives the rotating rod 18 to rotate.

[0047] Taking into account that each time the intermediate cylinder 19 moves to the disengagement zone 22 and is reset again, the position of the pointer 7 changes and the current value cannot be accurately displayed, in order to solve this problem, the diameter of the disengagement zone 22 is smaller than the diameter of the connection zone 23, and the connection between the connection zone 23 and the disengagement zone 22 is set as an inclined surface, and the connecting groove 24 is located at the lowest position of the inclined surface. The connection between the connecting groove 24 and the inclined surface is rounded. When the intermediate cylinder 19 is reset from the disengagement zone 22 to the connection zone 23, the connecting block 25 contacts the inclined surface and slides into the connecting groove 24 along the direction of the inclined surface, thereby ensuring that the reading of the pointer 7 is always correct.

[0048] The disengagement assembly also includes a fixed rod 26 fixedly connected to the inner wall of the outer shell, and a piston rod 27 is coaxially slidably arranged on the fixed rod 26. The piston rod 27 is made of ferromagnetic material, and a step block 28 is arranged on the piston rod 27. A connecting plate 29 is coaxially sleeved on the side of the piston rod 27 away from the step block 28. The connecting plate 29 is fixedly connected to the inner wall of the outer shell, and an elastic member 30 is arranged between the step block 28 and the connecting plate 29. A connecting strip 31 is fixedly connected to one end of the piston rod 27 away from the step block 28, and a connecting disk 32 is coaxially arranged on the intermediate cylinder 19. The end of the connecting strip 31 away from the piston rod 27 is slidably connected to the connecting disk 32.

[0049] A mounting cylinder 33 coaxial with the piston rod 27 is fixedly connected to the inner wall of the housing. An electromagnetic coil 34 is arranged in the mounting cylinder 33. Two ends of the electromagnetic coil 34 are respectively connected to the sensing terminal 4 and the energized coil 16 to form a series circuit.

[0050] During use, when the leakage current of the lightning arrester 2 is in a normal state, the current flowing through the electromagnetic coil 34 is small, and the torque generated is not enough to make the piston rod 27 break through the restriction of the elastic member 30. The leakage current enters the energized coil 16 after passing through the electromagnetic coil 34. At this time, the frame 15 drives the pointer 7 to rotate normally after conduction through the rotating shaft 17, the intermediate cylinder 19 and the rotating rod 18. When the leakage current of the lightning arrester 2 suddenly increases, the current flowing through the electromagnetic coil 34 suddenly increases. At this time, the piston rod 27 is subjected to a large torque and breaks through the restriction of the elastic member 30. At this time, the intermediate cylinder 19 moves toward the disengagement zone 22 driven by the connecting plate 32 and the connecting strip 31. When the connecting block 25 is completely in the disengagement zone 22, the frame 15 no longer drives the pointer 7 to rotate.

[0051] Through the above-mentioned settings of the rotating rod 18, the intermediate cylinder 19, the piston rod 27 and the electromagnetic coil 34, whenever the leakage current of the lightning arrester 2 is too large, the torque generated by the electromagnetic coil 34 will drive the piston rod 27 to break through the restriction of the elastic member 30, thereby driving the intermediate cylinder 19 to move to the disengagement area 22, preventing the pointer 7 from moving quickly or suddenly impacting the extreme position of the dial 37, thereby increasing the service life of the pointer 7.

[0052] When the electromagnetic principle is used to protect the pointer 7 from being disengaged, the piston rod 27 will move after the current passing through the coil exceeds a certain threshold value. However, sometimes it is necessary to monitor and warn different leakage current peak values ​​of the lightning arrester 2. At this time, it is troublesome to replace different monitors. In view of the above problems, this embodiment makes further improvements on the basis of the above embodiments.

[0053] It also includes an adjustment component, which includes an adjustment rod 35 rotatably connected to the cover plate 6, the adjustment rod 35 is located below the piston rod 27, and an adjustment thread is provided at one end of the adjustment rod 35 close to the piston rod 27. An adjustment ring 36 matching the adjustment thread is provided on the adjustment rod 35, and an annular groove is provided on the adjustment ring 36. The outer edge of the connecting plate 29 is located inside the annular groove.

[0054] When the adjusting rod 35 rotates, the adjusting ring 36 moves on the adjusting rod 35 and drives the connecting plate 29 to move on the piston rod 27. At this time, the compression amount of the elastic member 30 changes.

[0055] The cover plate 6 is provided with a dial 37 coaxially arranged with the adjusting rod 35 , the pitch of the adjusting thread matches the dial 37 , a handle 38 is coaxially fixed to the end of the adjusting rod 35 , and an indicating arrow is arranged on the handle 38 .

[0056] During use, when installing the monitoring device, the worker manually rotates the handle 38, the adjusting ring 36 moves on the adjusting rod 35 and drives the connecting plate 29 to slide on the piston rod 27, the compression amount of the elastic member 30 changes, and the inspection personnel can select the compression amount of the elastic member 30 according to the indication of the indicating arrow and the dial 37.

[0057] Through the settings of the adjusting rod 35, adjusting thread, adjusting ring 36 and connecting plate 29, the monitoring device can alarm according to the peak values ​​of different leakage currents. The greater the compression of the spring, the greater the torque required by the piston rod 27, and the greater the required leakage current. Conversely, when a smaller peak value of the leakage current occurs, the piston rod 27 can move. This setting makes the monitoring device more versatile and more universal.

[0058] In order to enable the monitoring device to realize remote alarm and reduce the dependence on patrol work, this embodiment makes further improvements on the basis of the above embodiment.

[0059] The signal feedback component includes a first contact piece 39 arranged at the bottom of the receiving plate 9, and a second contact piece 40 is arranged on the connecting strip 31. The first contact piece 39 and the second contact piece 40 are electrically connected to an external receiver through a wire, and the external receiver is provided with a signal feedback unit, a display unit and a memory unit.

[0060] When the piston rod 27 moves so that the second contact piece 40 contacts the first contact piece 39, the external receiver will receive an action signal, and the external receiver will send an alarm signal to the user and record it.

[0061] The signal feedback unit includes a signal lamp and a buzzer, and the display unit includes a display.

[0062] During use, when the piston rod 27 breaks through the restriction of the elastic member 30, the second contact piece 40 contacts the first contact piece 39, and the external receiver in the ground control room receives an action signal, sends out an alarm signal and records it.

[0063] Through the settings of the first contact piece 39, the second contact piece 40 and the external receiver, the remote alarm of the monitoring device is realized, and the staff can also view the number of alarms within the working cycle of the lightning arrester 2 through the display to determine the possible fault problems of the lightning arrester 2.

[0064] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An arrester online monitoring device, comprising a support frame (1), an arrester (2), a mounting plate (3) and a sensing terminal (4), wherein the angle between the mounting plate (3) and the support frame (1) is an obtuse angle, and characterized in that: It also includes a shell (5), which is fixedly connected to the mounting plate (3) and has an open cylindrical structure at one end; A cover plate (6) fixedly connected to the opening of the shell (5); A pointer (7) disposed on a side of the housing (5) away from the cover plate (6); A dial (8) disposed on a side of the housing (5) away from the cover plate (6); The sensing terminal (4) and the grounding terminal are respectively fixedly connected to the cover plate (6); A signal feedback component, which is arranged in the housing (5); A current monitoring component is arranged in the housing (5), the current monitoring component is respectively connected to the sensing terminal (4) and the grounding terminal by electrical signals, the current monitoring component comprises a receiving plate (9) fixed in the housing (5), a horseshoe magnet (10) is arranged on the receiving plate (9), symmetrically distributed pole shoes (11) are respectively arranged on both sides of the opening of the horseshoe magnet (10), an iron core (12) is arranged between the two pole shoes (11), a positioning plate (13) is fixed on the receiving plate (9), the iron core (12 ) is coaxially fixed with a connecting shaft (14), the end of the connecting shaft (14) away from the iron core (12) is fixedly connected to the positioning plate (13), the connecting shaft (14) is rotatably connected to a frame (15), an energized coil (16) is wound around the frame (15), the end of the frame (15) away from the connecting shaft (14) is fixedly connected to a rotating shaft (17), the housing (5) is rotatably connected to a rotating rod (18) coaxially arranged with the rotating shaft (17), and the pointer (7) is fixedly connected to the rotating rod (18); A disengagement component is provided in the current monitoring component, and when the peak value of the leakage current exceeds a threshold value, the disengagement component causes the pointer (7) to disengage from the current monitoring component, thereby preventing the pointer (7) from impacting the extreme position of the dial (37).

2. The arrester online monitoring device according to claim 1, characterized in that: The disengagement assembly comprises an intermediate cylinder (19) coaxially sleeved with the rotating rod (18) and the rotating shaft (17); a clamping groove (20) is formed on the rotating shaft (17); a clamping block (21) matching the clamping groove (20) is fixedly connected to the inner wall of the intermediate cylinder (19); the rotating rod (18) comprises a disengagement area (22) and a connection area (23); a connection groove (24) in the same direction as the axis of the rotating rod (18) is formed on the connection area (23); a connection block (25) matching the connection groove (24) is fixedly connected to the inner wall of the intermediate cylinder (19); when the intermediate cylinder (19) moves to a side away from the rotating rod (18), the connection block (25) moves from the connection area (23) to the disengagement area (22); at this time, the rotation of the rotating shaft (17) no longer drives the rotating rod (18) to rotate.

3. The arrester online monitoring device according to claim 2, characterized in that: The diameter of the separation zone (22) is smaller than the diameter of the connection zone (23), and the connection between the connection zone (23) and the separation zone (22) is arranged as an inclined surface.

4. The arrester online monitoring device according to claim 3, characterized in that: The disengagement assembly further comprises a fixed rod (26) fixedly connected to the inner wall of the housing, a piston rod (27) being coaxially slidably disposed on the fixed rod (26), the piston rod (27) being made of ferromagnetic material, a step block (28) being disposed on the piston rod (27), a connecting plate (29) being coaxially sleeved on a side of the piston rod (27) away from the step block (28), the connecting plate (29) being fixedly connected to the inner wall of the housing, an elastic member (30) being disposed between the step block (28) and the connecting plate (29), a connecting strip (31) being fixedly connected to one end of the piston rod (27) away from the step block (28), a connecting disk (32) being coaxially disposed on the intermediate cylinder (19), and an end of the connecting strip (31) away from the piston rod (27) being slidably connected to the connecting disk (32).

5. The arrester online monitoring device according to claim 4, characterized in that: A mounting cylinder (33) coaxial with the piston rod (27) is fixedly connected to the inner wall of the housing, an electromagnetic coil (34) is arranged in the mounting cylinder (33), and two ends of the electromagnetic coil (34) are respectively connected to the sensing terminal (4) and the energized coil (16) to form a series circuit.

6. The arrester online monitoring device according to claim 5, characterized in that: The invention also comprises an adjustment assembly, the adjustment assembly comprising an adjustment rod (35) rotatably connected to the cover plate (6), the adjustment rod (35) being located below the piston rod (27), an end of the adjustment rod (35) close to the piston rod (27) being provided with an adjustment thread, the adjustment rod (35) being provided with an adjustment ring (36) matching the adjustment thread, the adjustment ring (36) being provided with an annular groove, and the outer edge of the connecting plate (29) being located inside the annular groove; When the adjusting rod (35) rotates, the adjusting ring (36) moves on the adjusting rod (35) and drives the connecting plate (29) to move on the piston rod (27), and at this time, the compression amount of the elastic member (30) changes.

7. The arrester online monitoring device according to claim 6, characterized in that: The cover plate (6) is provided with a dial (37) coaxially arranged with the adjustment rod (35); the pitch of the adjustment thread matches the dial (37); a handle (38) is coaxially fixed to the end of the adjustment rod (35); and an indicating arrow is provided on the handle (38).

8. The arrester online monitoring device according to claim 7, characterized in that: The signal feedback component comprises a first contact piece (39) arranged at the bottom of the receiving plate (9), a second contact piece (40) being arranged on the connecting strip (31), the first contact piece (39) and the second contact piece (40) being electrically connected to an external receiver via a wire, and the external receiver is provided with a signal feedback unit, a display unit and a memory unit; When the piston rod (27) moves so that the second contact piece (40) contacts the first contact piece (39), the external receiver will receive an action signal, and the external receiver will send an alarm signal to the user and record it.

9. The arrester online monitoring device according to claim 8, characterized in that: The signal feedback unit includes a signal lamp and a buzzer, and the display unit includes a display.

10. A lightning arrester online monitoring method, applied to the lightning arrester online monitoring device according to claim 1, characterized in that: The following steps are involved: S1, fixing the mounting plate (3) on the support frame (1) and adjacent to the corresponding lightning arrester (2); S2. Fix the monitoring device on the mounting plate (3), and connect the sensing terminal (4) of the monitoring device to the grounding line of the lightning arrester (2), with the grounding terminal being connected to the grounding wire reference point or directly grounded; S3, connecting the signal feedback component in the monitoring device to the external receiver in the ground control room through a wire; S4. Adjust the regulating components in the monitoring device to monitor different leakage current peak values; S5. Power the arrester system and check the readings on the monitor; S6. Set or calibrate monitoring parameters according to actual conditions.

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