An online monitoring device for leakage current of surge arresters

Abstract

This invention discloses an online monitoring device for leakage current of a surge arrester, belonging to the field of surge arrester technology. Through the setting of a quick-installation mechanism and a clamping mechanism, the insulating sleeve drives the connecting shaft and the snap-fit ​​block to rotate in the sliding groove. When the snap-fit ​​block rotates to the end with the smaller aperture, the insulating sleeve and the monitor body are limited, and the monitor body is quickly installed in the mounting cavity. When it is necessary to quickly remove the monitor body, the elastic potential energy stored in the spring is quickly released and pushes the clamping part to move. Under the guidance of the mounting ring, the clamping part accelerates along the axial direction of the mounting cavity to push the monitor body out of the mounting cavity to complete the quick removal.

Description

Technical Field

[0001] This invention relates to the field of surge arrester technology, and in particular to an online monitoring device for surge arrester leakage current. Background Technology

[0002] The surge arrester leakage current online monitoring device is a key device used to monitor the leakage current of surge arresters in real time under operating voltage. Through high-precision sensors, data acquisition and intelligent analysis technology, it accurately captures changes in the internal insulation state of the surge arrester, realizes early warning of faults and status assessment, and is an important tool to ensure the safe and stable operation of the power system.

[0003] In actual use, pointer jamming may cause the displayed leakage current value to remain at a certain value, while the actual leakage current may have exceeded the safe range. This may prevent the potential problems of the surge arrester from being detected in time, increasing the risk of the power system being damaged by overvoltage such as lightning strikes. In this case, it is necessary to quickly disassemble the ammeter for further inspection.

[0004] Because the space around high-voltage equipment is often narrow, the operating space is greatly limited when maintenance personnel disassemble the leakage current meter of the surge arrester. The traditional screw fixing method requires the use of tools such as wrenches to tighten the screws. In the narrow space, the use of tools is hindered, and it is difficult to find a suitable operating angle and force point, which makes the disassembly work impossible to carry out smoothly.

[0005] At the same time, since operating near high-voltage equipment inherently carries certain safety risks, maintenance personnel need to be more cautious when disassembling ammeters to avoid touching high-voltage equipment or live parts. Improper operation may lead to serious accidents such as electric shock or short circuits, threatening the lives of maintenance personnel and the stable operation of the power system. Summary of the Invention

[0006] The purpose of this invention is to address the problem that when using a conventional screw-fixed ammeter for quick disassembly and inspection, the use of tools is hindered in confined spaces, making it difficult to find a suitable operating angle and force point, thus preventing the disassembly work from proceeding smoothly. Therefore, this invention proposes an online monitoring device for surge arrester leakage current.

[0007] To achieve the above objectives, the present invention employs the following technology: an online monitoring device for surge arrester leakage current.

[0008] The device includes a monitor body and a mounting base installed on a surge arrester. The mounting base has a connection port in the middle for connecting to the surge arrester. The monitor body is equipped with a terminal for monitoring leakage current. The mounting base is equipped with a quick-release mechanism for installing and storing the monitor body. The quick-release mechanism includes an insulating sleeve fitted on the monitor body, and a snap-fit ​​block is installed on the insulating sleeve via a connecting shaft.

[0009] In addition, a mounting cavity for the monitor body to be embedded in the mounting base is provided. The end is connected to the connection port through a connector that runs through the middle of the mounting cavity. An abutment platform is provided in the mounting cavity. At least one sliding groove is equidistantly arranged around the surface of the abutment platform. Limiting holes are provided on each sliding groove.

[0010] The diameter of the limiting hole gradually decreases from one end to the other. The end with the larger diameter is set as the entrance for inserting the snap-fit ​​block. After the snap-fit ​​block rotates to the end with the smaller diameter, the monitor body is limited.

[0011] A clamping mechanism is provided in the middle of the mounting cavity. The clamping mechanism includes a clamping member movably disposed in the mounting cavity and a spring connected to the clamping member. After the monitor body is embedded in the mounting cavity, the spring is in a compressed state, and the clamping member applies a force to push the monitor body out of the mounting cavity through the spring.

[0012] Further description of an online monitoring device for surge arrester leakage current as described above:

[0013] The clamping mechanism also includes a countersunk hole in the middle of the abutment platform, a mounting ring in the middle of the countersunk hole, a clamping member that is slidably nested on the mounting ring and has a positioning hole in the middle, and a connector that is rotatably embedded in the positioning hole.

[0014] The spring is wound around the surface of the mounting ring, and both ends of the spring are connected to the mounting ring and the abutment, respectively.

[0015] Further description of an online monitoring device for surge arrester leakage current as described above:

[0016] The bottom of the snap-fit ​​block and the sliding groove, the bottom of the connector and the connection port, and the bottom of the clamping member and the countersunk hole are all reserved with stroke clearance required for the monitor body to perform secondary downward pressure.

[0017] Further description of an online monitoring device for surge arrester leakage current as described above:

[0018] The end with the larger diameter of the limiting hole is the same as the diameter of the snap-fit ​​block, and the end with the smaller diameter is the same as the diameter of the connecting shaft.

[0019] Further description of an online monitoring device for surge arrester leakage current as described above:

[0020] The insulating sleeve includes a first sleeve body and a second sleeve body that are rotatably connected. The first sleeve body and the second sleeve body are combined to form an annulus that fits the outer diameter of the monitor body. An annular positioning ring is separably provided inside the first sleeve body and the second sleeve body. The positioning ring abuts against the monitor body for limiting. An annular back plate connected to the connecting shaft is provided on the first sleeve body.

[0021] The first and second sets are connected by a locking mechanism.

[0022] Further description of an online monitoring device for surge arrester leakage current as described above:

[0023] The locking mechanism includes a hinge member provided on the first body and a hinge groove provided on the second body, wherein the hinge member and the hinge groove are rotatably connected.

[0024] In addition, the second set of the body is provided with an abutment block and a first rotating shaft. The rotating rod on the first rotating shaft has a movable cavity at the top, and a threaded rod is provided in the movable cavity. A rotating rod that meshes with the threaded rod is rotatably provided in the movable cavity. An abutment block that fits against the surface of the abutment block is sleeved on the surface of the rotating rod.

[0025] Further description of an online monitoring device for surge arrester leakage current as described above:

[0026] The rotating rod surface is provided with a ring, and a spring washer is wound around the rotating rod surface located below the ring. The two ends of the spring washer are respectively attached to the inner wall of the movable cavity and the ring provided on the rotating rod surface.

[0027] Further description of an online monitoring device for surge arrester leakage current as described above:

[0028] The mounting cavity is provided with a first mating cavity that mates with the hinge and the hinge groove, and a second mating cavity that mates with the abutment block and the first rotating shaft. The first and second mating cavities are adapted to the maximum rotation angle of the insulating sleeve.

[0029] Further description of an online monitoring device for surge arrester leakage current as described above:

[0030] The mounting cavity is fixed in position by a locking mechanism. The locking mechanism includes a second rotating shaft located at the bottom of the mounting cavity, and a hook is rotatably mounted on the surface of the second rotating shaft. A button is provided on the hook.

[0031] The second set of body has several slots on its surface that cooperate with the hooks.

[0032] Further description of an online monitoring device for surge arrester leakage current as described above:

[0033] The engaging part of the hook is respectively set as an inclined surface and a vertical surface, and the slot is provided with an inclined surface and a flat surface that cooperate with the hook. When the inclined surface of the hook contacts the inclined surface of the slot, the hook deflects about the second axis.

[0034] A torsion spring is wound around the surface of the second rotating shaft, and the two ends of the torsion spring are connected to the second rotating shaft and the hook, respectively.

[0035] One of the above technical solutions has the following advantages or beneficial effects:

[0036] 1. With the quick-installation mechanism, when installing the monitor body, first, an insulating sleeve is placed on the surface of the monitor body. The insulating sleeve and the monitor body are then placed into the installation cavity together. At this time, the snap-fit ​​block and the connecting shaft on the insulating sleeve pass through the end with the larger diameter of the limiting hole in sequence until the insulating sleeve abuts against the abutment platform. At this time, the snap-fit ​​block abuts against the inner wall of the sliding groove. Then, the insulating sleeve is rotated, causing the insulating sleeve to drive the connecting shaft and the snap-fit ​​block to rotate in the sliding groove. When the snap-fit ​​block rotates to the end with the smaller diameter, the limiting hole restricts the position of the snap-fit ​​block, preventing it from moving out of the sliding groove. The insulating sleeve and the monitor body are limited, and the monitor body is quickly installed, thus achieving the purpose of quick installation of the monitor body.

[0037] 2. Through the set clamping mechanism, after the snap-fit ​​block is engaged with the limiting hole to fix the insulating sleeve, the elastic potential energy of the spring is continuously converted into thrust, so that the snap-fit ​​block and the inner wall of the limiting hole are always in a tight fit, further increasing the friction between the snap-fit ​​block and the sliding groove, and preventing the monitor body and the insulating sleeve from shifting in the opposite direction. At the same time, when it is necessary to quickly remove the monitor body, the monitor body and the insulating sleeve need to be pressed again, and then the insulating sleeve is rotated in the opposite direction to release the restriction of the snap-fit ​​block and the limiting hole on the position of the insulating sleeve. The elastic potential energy stored in the spring is quickly released and pushes the clamping part to move. Under the guidance of the mounting ring, the clamping part accelerates along the axial direction of the mounting cavity and pushes the snap-fit ​​block out of the sliding groove. The insulating sleeve and the monitor body are pushed out of the mounting cavity by the clamping part, thereby achieving the purpose of quickly removing the monitor body. Attached Figure Description

[0038] Figure 1 A three-dimensional structural schematic diagram of an online monitoring device for leakage current of a surge arrester is shown;

[0039] Figure 2 A three-dimensional structural diagram of the quick-release mechanism in its disassembled state is shown;

[0040] Figure 3 A three-dimensional structural diagram of the mounting base in its detached state is shown;

[0041] Figure 4 This diagram shows a three-dimensional cross-sectional view of the quick-assembly mechanism in its disassembled state.

[0042] Figure 5 A three-dimensional cross-sectional view of the quick-assembly mechanism in its fixed state is shown.

[0043] Figure 6 A three-dimensional structural diagram of the monitor body when separated from the quick-release mechanism is shown;

[0044] Figure 7A three-dimensional structural schematic diagram of the insulating sleeve is shown;

[0045] Figure 8 A front sectional view of the quick-release mechanism and the clamping mechanism is shown.

[0046] Figure 9 A three-dimensional cross-sectional structural diagram of the clamping component is shown;

[0047] Figure 10 A three-dimensional structural diagram of the insulating sleeve in its separated state is shown;

[0048] Figure 11 A three-dimensional structural diagram of the assembled insulating sleeve is shown;

[0049] Figure 12 A schematic diagram of the three-dimensional structure of the second set of bodies is shown;

[0050] Figure 13 A front sectional view of the locking mechanism is shown.

[0051] Figure 14 A three-dimensional cross-sectional structural diagram of the locking mechanism is shown;

[0052] Figure 15 It shows Figure 14 A magnified structural diagram of point A in the middle.

[0053] Legend:

[0054] 11. Monitor body; 12. Mounting base; 121. Connecting port; 122. Threaded ring; 123. Bolt hole; 124. Bolt; 125. Wire; 126. Fitting groove; 127. Fitting block; 128. Mounting bracket; 13. End;

[0055] 20. Quick-release mechanism; 21. Mounting cavity; 211. Threaded groove; 212. First mating cavity; 213. Second mating cavity; 22. Abutment platform; 23. Connecting shaft; 24. Snap-fit ​​block; 25. Sliding groove; 26. Limiting hole; 27. Insulating sleeve; 271. First sleeve body; 272. Second sleeve body; 273. Positioning ring; 274. Back plate; 28. Connector;

[0056] 30. Clamping mechanism; 31. Countersunk hole; 32. Mounting ring; 33. Clamping element; 34. Spring; 35. Positioning hole;

[0057] 40. Locking mechanism; 41. Hinge; 42. Hinge groove; 43. Abutment block; 44. First rotating shaft; 45. Rotating rod; 46. Movable cavity; 47. Threaded rod; 48. Rotating rod; 49. Pressing block; 410. Spring washer;

[0058] 50. Locking mechanism; 51. Second rotating shaft; 52. Hook; 53. Toggle button; 54. Torsion spring; 55. Slot. Detailed Implementation

[0059] The following will describe in detail, with reference to the accompanying drawings of the embodiments of the present invention, a surge arrester leakage current online monitoring device according to the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0060] To address the problem of traditional screw-mounted ammeters being difficult to disassemble for inspection in confined spaces, hindering tool use and making it hard to find suitable operating angles and leverage points, thus preventing smooth disassembly, this invention proposes an online monitoring device for surge arrester leakage current. Figure 1 - Figure 15 As shown:

[0061] The device includes a monitor body 11 and a mounting base 12 installed on the surge arrester. The monitor body 11 is equipped with a terminal 13 for monitoring leakage current, such as... Figure 3 As shown, a connection port 121 is provided in the middle of the mounting base 12. The connection port 121 is connected to the surge arrester through a wire 125. Two mounting brackets 128 are mounted on the surge arrester, and a fitting block 127 is provided on the mounting bracket 128. The connection port 121 is fitted into the fitting block 127 through a fitting groove 126 opened on the surface, so that the connection port 121 is fixedly installed under the surge arrester.

[0062] like Figures 4-8 As shown, a quick-release mechanism 20 for mounting and storing the monitor body 11 is provided on the mounting base 12. The quick-release mechanism 20 includes an insulating sleeve 27 sleeved on the monitor body 11. Three snap-fit ​​blocks 24 are mounted on the insulating sleeve 27 via a connecting shaft 23.

[0063] Additionally, a mounting cavity 21 is installed on the mounting base 12 for the monitor body 11 to be embedded in. The end 13 is connected to the connection port 121 through a connector 28 that passes through the middle of the mounting cavity 21. An abutment platform 22 is provided inside the mounting cavity 21, such as... Figures 2-6 As shown, a threaded ring 122 is provided on the mounting base 12, and three bolt holes 123 are opened on the surface of the threaded ring 122. A threaded groove 211 is provided on the mounting cavity 21, and a through hole corresponding to the position of the bolt hole 123 is opened on the surface of the abutment platform 22. After the mounting cavity 21 is installed on the mounting base 12 through the rotational engagement of the threaded groove 211 and the threaded ring 122, the bolt 124 passes through the through hole and engages with the bolt hole 123 for reinforcement. The installation of the mounting cavity 21 is completed.

[0064] Three sliding grooves 25 are equidistantly arranged around the surface of the contact platform 22. Each sliding groove 25 has a limiting hole 26. The diameter of the limiting hole 26 gradually decreases from one end to the other. The end with the larger diameter is set as the entry point for the snap-fit ​​block 24. When installing the monitor body 11, first, an insulating sleeve 27 is fitted onto the surface of the monitor body 11. The insulating sleeve 27 and the monitor body 11 are then placed into the mounting cavity 21. At this time, the snap-fit ​​block 24 and the connecting shaft 23 on the insulating sleeve 27 pass through the end with the larger diameter of the limiting hole 26 in sequence until the insulating sleeve 27 abuts against the contact platform 22. At this time, the snap-fit ​​block 24 abuts against the inner wall of the sliding groove 25. Then, the insulating sleeve 27 is rotated so that the insulating sleeve 27 abuts against the contact platform 22. 7 drives the connecting shaft 23 and the snap-fit ​​block 24 to rotate in the sliding groove 25. When the snap-fit ​​block 24 rotates to the end with the smaller aperture, the limiting hole 26 restricts the position of the snap-fit ​​block 24 so that it cannot move out of the sliding groove 25. The insulating sleeve 27 and the monitor body 11 are limited, and the monitor body 11 is quickly installed. At this time, the end 13 is connected to the connection port 121 through the connector 28. The leakage current data of the surge arrester is sequentially transmitted through the wire 125, the connection port 121, the connector 28 and the end 13 to the monitor body 11. The monitor body 11 records the number of times the surge arrester operates due to lightning strikes or operational overvoltages through a counter, providing a basis for evaluating the lightning protection effect and equipment life.

[0065] Preferably, the larger diameter end of the limiting hole 26 is the same as the diameter of the snap-fit ​​block 24. This design requires all three snap-fit ​​blocks 24 to simultaneously pass through the larger diameter end of the limiting hole 26 and be embedded in the sliding groove 25, which restricts the insertion direction and position of the snap-fit ​​blocks 24 and effectively avoids misassembly caused by negligence or improper operation during assembly. Since the initial positions of the three snap-fit ​​blocks 24 are the same after being embedded in the sliding groove 25, when the insulating sleeve 27 is rotated for limiting, the three snap-fit ​​blocks 24 slide along the trajectory of the sliding groove 25 at the same time, ensuring that each snap-fit ​​block 24 can accurately reach the predetermined position, thereby improving the accuracy and efficiency of assembly.

[0066] Meanwhile, the smaller diameter end has the same diameter as the connecting shaft 23. When the locking block 24 rotates to the other end of the sliding groove 25, the connecting shaft 23 can fit tightly against the inner wall of the smaller diameter end of the limiting hole 26, thereby limiting the rotation range of the locking block 24, clarifying the limit position of the locking block 24 rotation, preventing the locking block 24 from rotating excessively, and preventing the locking block 24 from moving in the opposite direction by the additional friction generated by the tight contact between the connecting shaft 23 and the limiting hole 26, further improving the fixing effect of the locking block 24 and the limiting hole 26 on the insulating sleeve 27.

[0067] like Figures 8-9As shown, under the premise that the snap-fit ​​block 24 and the sliding groove 25, the connecting shaft 23 and the limiting hole 26 are tightly fitted, and the surface roughness is appropriate to generate a certain friction force, the mounting cavity 21 will have a good limiting effect on the insulating sleeve 27. When the force generated by vibration is less than the friction force, the insulating sleeve 27 will not reverse or shift in the mounting cavity 21. However, in actual use, when the voltage surges, it is easy to cause the transformer to work unstablely, thereby generating mechanical vibration that exceeds the friction limiting effect. In order to further improve the stability of the insulating sleeve 27 when it is set in the mounting cavity 21, a clamping mechanism 30 is provided in the middle of the mounting cavity 21. The clamping mechanism 30 includes a clamping member 33 movably set in the mounting cavity 21 and a spring 34 connected to the clamping member 33.

[0068] And a countersunk hole 31 is provided in the middle of the abutment platform 22. A mounting ring 32 is provided in the middle of the countersunk hole 31. The clamping member 33 is slidably nested on the mounting ring 32 and a positioning hole 35 is provided in the middle. The connector 28 is rotatably embedded in the positioning hole 35. The spring 34 is wound on the surface of the mounting ring 32, and the two ends of the spring 34 are respectively connected to the mounting ring 32 and the clamping member 33.

[0069] When the monitor body 11 and the insulating sleeve 27 are inserted into the mounting cavity 21, the end 13 is inserted into the positioning hole 35 and connected to the connector 28. At the same time, the insulating sleeve 27 abuts against the clamping member 33 and pushes the clamping member 33 to move under the restriction of the mounting ring 32. The clamping member 33 moves and cooperates with the mounting ring 32 to squeeze the spring 34. At this time, the spring 34 is in a compressed state. Then, the insulating sleeve 27 is rotated, so that the monitor body 11 drives the connector 28 to rotate under the restriction of the positioning hole 35. At the same time, the insulating sleeve 27 drives the snap-fit ​​block 24 to move in the sliding groove 25. After the snap-fit ​​block 24 cooperates with the limiting hole 26 to fix the insulating sleeve 27, the elastic potential energy of the spring 34 is continuously converted into thrust, so that the snap-fit ​​block 24 and the inner wall of the limiting hole 26 are always in a tight fit, further increasing the friction between the snap-fit ​​block 24 and the sliding groove 25, and preventing the monitor body 11 and the insulating sleeve 27 from being reversed.

[0070] When it is necessary to quickly remove the monitor body 11, press the monitor body 11 and the insulating sleeve 27 again, and then rotate the insulating sleeve 27 in the opposite direction to release the restriction of the position of the insulating sleeve 27 by the snap-fit ​​block 24 and the limiting hole 26. The elastic potential energy stored in the spring 34 is quickly released and pushes the clamping member 33 to move. Under the guidance of the mounting ring 32, the clamping member 33 accelerates along the axial direction of the mounting cavity 21 and pushes the snap-fit ​​block 24 out of the sliding groove 25. The insulating sleeve 27 and the monitor body 11 are pushed out of the mounting cavity 21 by the clamping member 33, thereby achieving the purpose of quick disassembly.

[0071] It is important to note that, such as Figure 8As shown, the bottom of the snap-fit ​​block 24 and the bottom of the sliding groove 25, the bottom of the connector 28 and the connection port 121, and the bottom of the clamping member 33 and the countersunk hole 31 are all reserved with stroke gaps required for the monitor body 11 to perform secondary pressing. The movement generated by the secondary pressing makes the snap-fit ​​block 24 no longer tightly fitted with the limiting hole 26, improving the smoothness of the snap-fit ​​block 24 when rotating in the sliding groove 25.

[0072] like Figures 10-13 As shown, in order to facilitate the fitting of the insulating sleeve 27 onto the surface of the monitor body 11, the insulating sleeve 27 includes a first sleeve body 271 and a second sleeve body 272 rotatably connected. The first sleeve body 271 is provided with an annular back plate 274 connected to the connecting shaft 23. The first sleeve body 271 and the second sleeve body 272 are combined to form an annular shape that fits the outer diameter of the monitor body 11, so as to achieve leakage protection and protect the monitor body 11 from damage caused by physical collisions that may occur when it pops out of the mounting cavity 21. An annular positioning ring 273 is separably provided inside the first sleeve body 271 and the second sleeve body 272. During installation, the positioning ring 273 is placed together with the monitor body 11 inside the first sleeve body 271 and the second sleeve body 272. Under the compression of the first sleeve body 271 and the second sleeve body 272, the positioning ring 273 presses against the monitor body 11 to limit its movement, so that the monitor body 11 cannot rotate inside the first sleeve body 271 and the second sleeve body 272.

[0073] The first set 271 and the second set 272 are connected by a locking mechanism 40. The locking mechanism 40 includes a hinge 41 provided on the first set 271 and a hinge groove 42 provided on the second set 272. The hinge 41 and the hinge groove 42 are rotatably connected. The second set 272 also includes an abutment block 43 and a first rotating shaft 44. The rotating rod 45 provided on the first rotating shaft 44 has a movable cavity 46 at its top. A threaded rod 47 is provided in the movable cavity 46. A rotating rod 48 that meshes with the threaded rod 47 is rotatably provided in the movable cavity 46. An abutment block 49 that fits against the surface of the abutment block 43 is sleeved on the surface of the rotating rod 48.

[0074] By rotating the first sleeve 271, the first sleeve 271 drives the hinge 41 to rotate under the restriction of the hinge groove 42 and combine with the second sleeve 272 to form a ring. At this time, the rotating rod 45 is rotated, so that the rotating rod 45 is embedded in the abutment block 43 under the restriction of the first rotating shaft 44. Then, the rotating rod 48 is rotated and pushed, so that the rotating rod 48 meshes with the threaded rod 47 and pushes the abutment block 49 to abut against the abutment block 43. The abutment block 43 and the first rotating shaft 44 are locked under the cooperation of the rotating rod 45 and the abutment block 49. The first sleeve 271 and the second sleeve 272 cannot be rotated and unfolded, and the insulating sleeve 27 is installed.

[0075] Furthermore, a ring is provided on the surface of the rotating rod 48, and a spring washer 410 is wound around the surface of the rotating rod 48 located below the ring. The two ends of the spring washer 410 are respectively attached to the inner wall of the movable cavity 46 and the ring provided on the surface of the rotating rod 48. While the rotating rod 48 engages with the threaded rod 47 to push the pressing block 49 to move, the rotating rod 48 cooperates with the movable cavity 46 to squeeze the spring washer 410. Through the reverse elastic force generated when the spring washer 410 is compressed, tension is continuously applied to the rotating rod 48. When the rotating rod 48 has a tendency to loosen, the spring washer 410 applies additional friction to the rotating rod 48 through its own elastic deformation, so as to prevent the rotating rod 48 from loosening on its own due to vibration, impact and other factors.

[0076] It should be noted that the mounting cavity 21 is provided with a first mating cavity 212 that mates with the hinge 41 and the hinge groove 42, and a second mating cavity 213 that mates with the abutment block 43 and the first rotating shaft 44. The first mating cavity 212 and the second mating cavity 213 are adapted to the maximum rotation angle of the insulating sleeve 27. When the insulating sleeve 27 is inserted into the mounting cavity 21, the components on the locking mechanism 40 are respectively inserted into the first mating cavity 212 and the second mating cavity 213 to achieve the purpose of protecting the locking mechanism 40.

[0077] To prevent the monitor body 11 and the insulating sleeve 27 from rotating on their own in the mounting cavity 21 due to vibration, impact, or other factors, an embodiment for fixing the insulating sleeve 27 is also proposed, such as... Figure 12 , Figure 14 and Figure 15 As shown, the mounting cavity 21 fixes the position of the second sleeve 272 by the locking mechanism 50. The locking mechanism 50 includes a second rotating shaft 51 disposed at the bottom of the mounting cavity 21, and a hook 52 is rotatably sleeved on the surface of the second rotating shaft 51. A button 53 is disposed on the hook 52. Several slots 55 that cooperate with the hook 52 are opened on the surface of the second sleeve 272.

[0078] Before the monitor body 11 and the insulating sleeve 27 are inserted into the mounting cavity 21, the dial 53 is turned to drive the hook 52 to deflect around the second rotating shaft 51 and completely move it out of the mounting cavity 21, so as to avoid the hook 52 from colliding with the insulating sleeve 27. After the insulating sleeve 27 is rotated and locked, the position of the second sleeve 272 is restricted by the cooperation of the hook 52 and the slot 55, so that it cannot rotate on its own. When it is necessary to release the restriction on the second sleeve 272, the dial 53 is turned again to move the dial 53 out of the slot 55.

[0079] Furthermore, the engaging part of the hook 52 is respectively set as an inclined surface and a vertical surface, the slot 55 is provided with an inclined surface and a flat surface that cooperate with the hook 52, and a torsion spring 54 is wound around the surface of the second rotating shaft 51, with the two ends of the torsion spring 54 connected to the second rotating shaft 51 and the hook 52 respectively.

[0080] After the monitor body 11 and the insulating sleeve 27 are fully inserted into the mounting cavity 21, the dial 53 can be released. Under the push of the elastic deformation recovery of the torsion spring 54, the dial 53 will automatically embed itself into the slot 55. The dial 53 and the slot 55 pre-limit the position of the insulating sleeve 27 so that it will not be pushed out of the mounting cavity 21 by the clamping member 33. At this time, the insulating sleeve 27 is rotated, and the second sleeve 272 drives the slot 55 to rotate. When the inclined surface of the hook 52 contacts the inclined surface of the slot 55, the slot 55 pushes the hook 52 to deflect around the second rotating shaft 51 and pulls the torsion spring 54 to undergo elastic deformation. Repeat the above operation. Under the action of the elastic deformation recovery of the torsion spring 54, the hook 52 will be embedded into each slot 55 in turn until the insulating sleeve 27 rotates to the maximum angle.

[0081] Working principle:

[0082] Connect the mounting base 12 to the surge arrester via the wire 125, and then embed the mounting base 12 into the mounting block 127 of the mounting bracket 128 on the surge arrester via the fitting groove 126, and fix it below the surge arrester.

[0083] The mounting cavity 21 is installed on the mounting base 12 through the threaded groove 211 and the threaded ring 122, and then the bolt 124 is used to penetrate the through hole of the abutment platform 22 and engage with the bolt hole 123 of the threaded ring 122 for reinforcement.

[0084] The first body 271 and the second body 272 of the insulating sleeve 27 are connected by the locking mechanism 40 to form a ring that fits the outer diameter of the monitor body 11. The positioning ring 273 is placed in the ring together with the monitor body 11 and squeezed to make the positioning ring 273 press against the monitor body 11 for limitation.

[0085] By rotating the first sleeve 271, the hinge 41 rotates under the restriction of the hinge groove 42 and combines with the second sleeve 272 to form a ring. Then, the rotating rod 45 is rotated to embed into the abutment block 43. The rotating rod 48 is rotated and pushed to engage with the threaded rod 47, and the abutment block 49 is pushed to abut and lock with the abutment block 43.

[0086] The monitor body 11 with the insulating sleeve 27 on is placed into the mounting cavity 21. The snap block 24 and the connecting shaft 23 of the insulating sleeve 27 pass through the larger end of the limiting hole 26 in sequence until the insulating sleeve 27 abuts against the abutment platform 22 and the snap block 24 abuts against the inner wall of the sliding groove 25.

[0087] Rotate the insulating sleeve 27 to drive the connecting shaft 23 and the snap block 24 to rotate in the sliding groove 25 until the snap block 24 reaches the end with the smaller diameter. The limiting hole 26 restricts the position of the snap block 24. At this time, the end 13 is connected to the connection port 121 through the connector 28.

[0088] When the clamping mechanism 30 in the middle of the mounting cavity 21 is activated, the elastic potential energy of the spring 34 is converted into a thrust, which makes the snap block 24 fit tightly against the inner wall of the limiting hole 26. When the monitor body 11 and the insulating sleeve 27 are inserted, the end 13 is inserted into the positioning hole 35 and connected to the connector 28. The insulating sleeve 27 pushes the clamping member 33 to move and squeezes the spring 34. After the insulating sleeve 27 is fixed by rotation, the spring 34 continues to act, and the monitor body 11 is quickly installed.

[0089] If it is necessary to further secure the insulating sleeve 27, the locking mechanism 50 can be used. Before the monitor body 11 and the insulating sleeve 27 are inserted into the mounting cavity 21, the toggle button 53 is turned so that the hook 52 is deflected out of the mounting cavity 21 with the second rotating shaft 51 as the axis.

[0090] After the insulating sleeve 27 is rotated and locked, the lever 53 is released. Under the action of the torsion spring 54, the hook 52 is inserted into the slot 55. Rotating the insulating sleeve 27 causes the hook 52 to be inserted into the slot 55 in sequence to restrict its position.

[0091] When disassembly is required, press the monitor body 11 and the insulating sleeve 27 again to loosen the tight fit between the snap block 24 and the limiting hole 26. Rotate the insulating sleeve 27 in the opposite direction to release the restriction of the position of the insulating sleeve 27 by the snap block 24 and the limiting hole 26. The elastic potential energy of the spring 34 is released, pushing the clamping member 33 to move, causing the snap block 24 to pop out of the sliding groove 25. The insulating sleeve 27 and the monitor body 11 pop out of the mounting cavity 21, and the monitor body 11 is quickly disassembled.

[0092] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the present invention's technology and inventive concept, should be covered within the scope of protection of the present invention.

Claims

1. An online monitoring device for leakage current of a surge arrester, comprising a monitor body (11) and a mounting base (12) installed on the surge arrester, wherein the mounting base (12) has a connection port (121) for connecting to the surge arrester in the middle, and a terminal (13) for monitoring leakage current is installed on the monitor body (11), characterized in that, The mounting base (12) is provided with a quick-release mechanism (20) for installing and storing the monitor body (11). The quick-release mechanism (20) includes an insulating sleeve (27) sleeved on the monitor body (11). A snap-fit ​​block (24) is installed on the insulating sleeve (27) through a connecting shaft (23). The insulating sleeve (27) includes a first sleeve body (271) and a second sleeve body (272) that are rotatably connected. The first sleeve body (271) and the second sleeve body (272) are combined to form an annulus that fits the outer diameter of the monitor body (11). An annular positioning ring (273) is detachably provided inside the first sleeve body (271) and the second sleeve body (272). The positioning ring (273) abuts against the monitor body (11) for limiting. An annular back plate (274) connected to the connecting shaft (23) is provided on the first sleeve body (271). The first set (271) and the second set (272) are connected by a locking mechanism (40); In addition, a mounting cavity (21) is installed on the mounting base (12) for the monitoring body (11) to be embedded. The end (13) is connected to the connection port (121) through a connector (28) that passes through the middle of the mounting cavity (21). An abutment platform (22) is provided in the mounting cavity (21). At least one sliding groove (25) is equidistantly arranged around the surface of the abutment platform (22). Limiting holes (26) are provided on each sliding groove (25). The diameter of the limiting hole (26) gradually decreases from one end to the other. The end with the larger diameter is set as the entrance for inserting the snap-fit ​​block (24). After the snap-fit ​​block (24) rotates to the end with the smaller diameter, the monitor body (11) is limited. A clamping mechanism (30) is provided in the middle of the mounting cavity (21). The clamping mechanism (30) includes a clamping member (33) movably disposed in the mounting cavity (21) and a spring (34) connected to the clamping member (33). After the monitor body (11) is embedded in the mounting cavity (21), the spring (34) is in a compressed state. The clamping member (33) applies a force through the spring (34) to push the monitor body (11) out of the mounting cavity (21).

2. The online monitoring device for leakage current of a surge arrester according to claim 1, characterized in that, The clamping mechanism (30) also includes a countersunk hole (31) in the middle of the abutment platform (22), a mounting ring (32) is provided in the middle of the countersunk hole (31), the clamping member (33) is slidably nested on the mounting ring (32) and a positioning hole (35) is provided in the middle, and the connector (28) is rotatably embedded in the positioning hole (35); The spring (34) is wound around the surface of the mounting ring (32), and the two ends of the spring (34) are connected to the mounting ring (32) and the abutment (33) respectively.

3. The online monitoring device for leakage current of a surge arrester according to claim 2, characterized in that, The bottom of the snap-fit ​​block (24) and the bottom of the sliding groove (25), the bottom of the connector (28) and the connection port (121), and the bottom of the clamping member (33) and the countersunk hole (31) are all reserved with a stroke clearance required for the monitor body (11) to perform secondary downward pressure.

4. The surge arrester leakage current online monitoring device according to claim 3, characterized in that, The larger end of the limiting hole (26) is the same as the diameter of the snap-fit ​​block (24), and the smaller end is the same as the diameter of the connecting shaft (23).

5. The online monitoring device for leakage current of a surge arrester according to claim 1, characterized in that, The locking mechanism (40) includes a hinge (41) provided on the first body (271) and a hinge groove (42) provided on the second body (272), wherein the hinge (41) and the hinge groove (42) are rotatably connected; In addition, the second set (272) is provided with an abutment block (43) and a first rotating shaft (44). The rotating rod (45) provided on the first rotating shaft (44) has a movable cavity (46) at the top, and a threaded rod (47) is provided in the movable cavity (46). A rotating rod (48) that meshes with the threaded rod (47) is rotatably provided in the movable cavity (46). An abutment block (49) that fits against the surface of the abutment block (43) is sleeved on the surface of the rotating rod (48).

6. The online monitoring device for leakage current of a surge arrester according to claim 5, characterized in that, The rotating rod (48) has a ring on its surface, and a spring washer (410) is wound around the rotating rod (48) below the ring. The two ends of the spring washer (410) are respectively attached to the inner wall of the movable cavity (46) and the ring on the surface of the rotating rod (48).

7. The surge arrester leakage current online monitoring device according to claim 5, characterized in that, The mounting cavity (21) is provided with a first mating cavity (212) that mates with the hinge (41) and the hinge groove (42), and a second mating cavity (213) that mates with the abutment block (43) and the first rotating shaft (44). The first mating cavity (212) and the second mating cavity (213) are adapted to the maximum rotation angle of the insulating sleeve (27).

8. The online monitoring device for leakage current of a surge arrester according to claim 1, characterized in that, The mounting cavity (21) fixes the position of the second sleeve (272) by a locking mechanism (50). The locking mechanism (50) includes a second rotating shaft (51) at the bottom of the mounting cavity (21), and a hook (52) is rotatably sleeved on the surface of the second rotating shaft (51). A button (53) is provided on the hook (52). The second set (272) has several slots (55) on its surface that cooperate with the hook (52).

9. The online monitoring device for leakage current of a surge arrester according to claim 8, characterized in that, The engaging part of the hook (52) is respectively set as an inclined surface and a vertical surface. The slot (55) is provided with an inclined surface and a flat surface that cooperate with the hook (52). When the inclined surface of the hook (52) contacts the inclined surface of the slot (55), the hook (52) deflects about the second rotating shaft (51). A torsion spring (54) is wound around the surface of the second rotating shaft (51), and the two ends of the torsion spring (54) are connected to the second rotating shaft (51) and the hook (52) respectively.

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