A lightning arrester protection device

Abstract

The present invention relates to the technical field of lightning arresters, and specifically to a lightning arrester protection device, comprising a composite support insulator, wherein a lower bracket and an upper bracket are respectively installed at both ends of the composite support insulator, and further comprising two lightning arresters symmetrically arranged on the upper bracket, and electrically connected to a cable through the upper bracket, a monitoring component electrically connected to the lightning arrester is provided on the lower bracket, and is used to monitor the leakage current of the lightning arrester, and a switching component connected to the monitoring component is provided on the lower bracket. The device adopts two symmetrical lightning arresters to form redundant protection, and initially only one is grounded. When an abnormal leakage current occurs, the switching component can isolate the faulty lightning arrester in time and put another one into operation, thereby ensuring power supply reliability and system safety and avoiding the expansion of the fault. The monitoring component monitors the leakage current in real time to realize early warning, and precise switching reduces the risk of misoperation, clearly locates the fault, and extends the life of the lightning arrester.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, in particular to a lightning arrester protection device. Background Art

[0002] As the core protection device for transmission cables, lightning arresters use their nonlinear volt-ampere characteristics to clamp overvoltage amplitudes and discharge transient overcurrents in real time, stabilizing cable voltages within safety thresholds. This effectively suppresses insulation breakdown and equipment failures. They also absorb and dissipate overvoltage energy, ensuring continuous and stable operation of the lines under complex operating conditions such as lightning strikes and operational overvoltages. They are a key barrier to safe power supply in the power grid.

[0003] In the existing technology, lightning arresters generally have integrated disconnectors. Their function is to quickly cut off the circuit through thermal fuse or mechanical tripping mechanism when a serious fault such as short circuit or explosion occurs in the lightning arrester, isolate the fault point to prevent cascading damage to the system, and accurately locate the fault position through visual means such as mechanical burst pieces and color identification to avoid secondary disasters caused by equipment explosion, significantly reduce operation and maintenance costs and improve system reliability. However, when the lightning arrester is disconnected due to a fault, the cable segment it protects will be directly exposed to the risk of lightning strike or overvoltage, which may lead to short circuit, equipment burning or even fire accidents due to insulation overload breakdown. For this reason, we propose a lightning arrester protection device. Summary of the Invention

[0004] In order to solve the above technical problems, an embodiment of the present application provides a lightning arrester protection device, including a composite support insulator, wherein a lower bracket and an upper bracket are respectively installed at both ends of the composite support insulator, and also includes two lightning arresters symmetrically arranged on the upper bracket, and electrically connected to the cable through the upper bracket. A monitoring component electrically connected to the lightning arrester is provided on the lower bracket, for monitoring the leakage current of the lightning arrester. A switching component connected to the monitoring component is provided on the lower bracket. In the initial state, only one of the lightning arresters is grounded. When the monitoring component detects that the leakage current of the lightning arrester is continuously abnormal, the switching component is used to disconnect the grounding connection of the currently grounded lightning arrester and ground the other lightning arrester.

[0005] In some embodiments, the switching assembly includes an insulating housing disposed on a lower bracket, two grounded Z-shaped conductors symmetrically disposed within the insulating housing, a push rod disposed on one side of the Z-shaped conductor, the push rod being made of an insulating material, a sliding sleeve fixedly connected within the insulating housing, the push rod passing through the sliding sleeve and slidably connected to the inner wall thereof, and moving the push rod thereby drives the Z-shaped conductor to connect to the lightning arrester;

[0006] A driving motor is fixedly connected to the insulating shell, a rotating disc is fixedly connected to the output shaft of the driving motor, one end of the push rod is rotatably connected to a cylinder, a guide groove part 1 is provided on the rotating disc, one end of the cylinder is located in the guide groove part 1, and is used for starting the driving motor to drive the rotating disc to rotate, the rotating disc first drives a Z-shaped conductor to move to dock with a lightning arrester, then drives another Z-shaped conductor to move to dock with another lightning arrester, and finally drives the Z-shaped conductor that first docked with the lightning arrester to separate from the lightning arrester.

[0007] In some embodiments, the guide groove member 1 includes an arcuate groove 1 provided on a rotating disc, one end of a cylinder is located in the arcuate groove 1 and is slidably connected to its inner wall, the rotating disc is provided with an arcuate groove 2 which is concentric with the rotating disc, the arcuate groove 2 is connected to the arcuate groove 1, and the rotating disc is provided with an arcuate groove 3 which is connected to the arcuate groove 2, and during the rotation of the rotating disc, the cylinder sequentially passes through the arcuate groove 1, the arcuate groove 2, and the arcuate groove 3 to drive the Z-shaped conductor to first dock with the lightning arrester, then maintain the docking state with the lightning arrester, and finally detach from the lightning arrester;

[0008] An arc-shaped groove four is provided on the rotating disc, which is concentric with the rotating disc. One end of the other cylinder is located in the arc-shaped groove four and is slidably connected to its inner wall. An arc-shaped groove five is provided on the rotating disc, which is connected to the arc-shaped groove four. An arc-shaped groove six is ​​provided on the rotating disc, which is concentric with the rotating disc. The arc-shaped groove six is ​​connected to the arc-shaped groove five. During the rotation of the rotating disc, the cylinder passes through the arc-shaped groove four, the arc-shaped groove five, and the arc-shaped groove six in sequence to drive the Z-shaped conductor to maintain a disconnected state with the lightning arrester, then drive it to dock with the lightning arrester, and finally maintain a docking state with the lightning arrester.

[0009] In some embodiments, one end of the arrester is fixedly connected to an insulating mounting plate, the insulating mounting plate is fixedly connected to the lower bracket, and one end of the arrester is fixedly connected to a disconnector, the disconnector is fixedly connected to a conductive stud, and a nut is screwed onto the conductive stud;

[0010] One end of the Z-shaped conductor is designed in a C shape, which is used to move the Z-shaped conductor to connect with the conductive stud.

[0011] In some embodiments, a sliding rod is fixedly connected to the Z-shaped conductor, one end of the sliding rod slides through the push rod, and a tension spring is sleeved on the sliding rod, with both ends respectively fixed to the Z-shaped conductor and the push rod. When the Z-shaped conductor and the conductive stud are in a docking state, the tension spring is in an elongated state, and is used to reset the tension spring when the disconnector is actuated to assist in driving the disconnector to disconnect from the lightning arrester.

[0012] In some embodiments, one end of the Z-shaped conductor is fixedly connected to a hollow cylinder, a sliding post is slidably connected to the hollow cylinder, a second guide groove is provided on the inner wall of the insulating shell, and one end of the sliding post is located in the second guide groove, so as to maintain the tension state of the tension spring by sliding the sliding post in the second guide groove when the push rod is moved to drive the Z-shaped conductor to connect with the conductive stud;

[0013] After the disconnector is actuated, the tension spring is stretched by sliding the sliding post in the second guide groove member during the process of moving the push rod to drive the Z-shaped conductor to be recovered.

[0014] In some embodiments, the guide groove member 2 includes a horizontal groove provided on the inner wall of the insulating shell, one end of the sliding column is located in the horizontal groove and is slidably connected to the inner wall thereof, the insulating shell is provided with a vertical groove connected to the horizontal groove, and the insulating shell is provided with an oblique groove, and both ends of the oblique groove are respectively connected to the horizontal groove and the vertical groove;

[0015] The inclined slide adopts a stepped design, and the steps adopt a sloped design. The deeper part of the inclined slide is the same depth as the horizontal slide and the vertical slide, and the shallower part is connected to the horizontal slide to form a step. The sliding column is located in the hollow cylinder and one end is fixedly connected to a spring, and one end of the spring is fixed to the inner wall of the hollow cylinder.

[0016] In some embodiments, the sliding post is designed with a conductive material, a conductive plate is provided in the insulating housing, the conductive plate contacts and abuts against the sliding post, and a conductive post is fixedly connected to one side of the conductive plate;

[0017] The monitoring component includes a leakage current meter fixedly connected to the insulating shell, the leakage current meter is electrically connected to the controller of the drive motor, and the leakage current meter is grounded, and one end of the push rod corresponding to the arc groove is fixedly connected to a connecting column, and the connecting column is designed with an insulating material, and one end of the connecting column is fixedly connected to a connecting plate, and a docking plate 1 is provided on one side of each of the two conductive columns, and a connecting column is also fixedly connected between the docking plate 1 and the connecting plate, and the docking plate 1 is grounded through a wire.

[0018] In some embodiments, a docking plate 2 is provided on one side of each of the two conductive columns, and a connecting column is also fixedly connected between the docking plate 2 and the connecting plate. The docking plate 2 is electrically connected to the leakage current meter through a wire. When the Z-shaped conductor corresponding to the arc-shaped slot 1 is driven to dock with the lightning arrester, the conductive column corresponding to the Z-shaped conductor only contacts with the docking plate 2, and the conductive column corresponding to the other Z-shaped conductor only contacts with the docking plate 1.

[0019] In some embodiments, a ring body is rotatably connected to the nut, and a rope body is fixedly connected between the ring body and the insulating mounting plate.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. This device uses two symmetrical lightning arresters to form redundant protection. Initially, only one is grounded. When an abnormal leakage current occurs, the switching component can promptly isolate the faulty lightning arrester and put the other one into operation, ensuring power supply reliability and system safety, and preventing the expansion of the fault. The monitoring component monitors the leakage current in real time to provide early warning. Accurate switching reduces the risk of misoperation, clearly locates the fault, and extends the life of the lightning arrester.

[0022] 2. The arrester of this device also integrates a disconnector. When the arrester suddenly fails, the disconnector can be automatically triggered to disconnect the arrester. During this process, the Z-shaped conductive plate will not interfere with the operation of the disconnector. It can also use the elastic force generated by the tension spring reset to provide assistance or auxiliary drive for the disconnector's operation, effectively ensuring that the disconnector can be separated from the arrester smoothly and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0024] Figure 2 For the present invention Figure 1 Another structural diagram;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of the local cross-section structure;

[0026] Figure 4 For the present invention Figure 3 Schematic diagram of the local cross-section structure;

[0027] Figure 5 For the present invention Figure 4 Another structural diagram;

[0028] Figure 6 For the present invention Figure 4 Schematic diagram of the local cross-section structure;

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the local cross-section structure;

[0030] Figure 8 This is a structural diagram of the conductive plate of the present invention;

[0031] Figure 9 This is a structural diagram of Example 2 of the present invention.

[0032] In the figure: 1-composite post insulator; 11-lower bracket; 12-upper bracket; 2-lightning arrester; 3-monitoring component; 4-switching component; 41-insulating housing; 42-Z-shaped conductor; 43-push rod; 44-sliding sleeve; 45-driving motor; 46-rotating disk; 47-cylinder; 48-guide groove part 1; 49-arc groove 1; 51-arc groove 2; 52-arc groove 3; 53-arc groove 4; 54-arc groove 5; 55-arc groove 6; 5 6-insulating mounting plate; 57-disconnector; 58-conductive stud; 59-nut; 61-slide rod; 62-tension spring; 63-hollow cylinder; 64-sliding column; 65-guide groove part 2; 66-horizontal slide groove; 67-vertical slide groove; 68-oblique slide groove; 69-spring; 71-conductive plate; 72-conductive column; 73-leakage current meter; 74-connecting column; 75-connecting plate; 76-docking plate 1; 77-docking plate 2; 78-ring body; 79-rope body. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1-8 The present invention provides a technical solution: a lightning arrester protection device, comprising a composite post insulator 1, a lower bracket 11 and an upper bracket 12 being respectively installed at both ends of the composite post insulator 1, and further comprising:

[0035] Two lightning arresters 2 are symmetrically arranged on the upper bracket 12 and electrically connected to the cable through the upper bracket 12;

[0036] A monitoring component 3 is provided on the lower bracket 11 and is electrically connected to the arrester 2, and is used to monitor the leakage current of the arrester 2;

[0037] The switching component 4 is provided on the lower bracket 11 and is connected to the monitoring component 3. In the initial state, only one lightning arrester 2 is grounded. When the monitoring component 3 detects that the leakage current of the lightning arrester 2 is continuously abnormal, the switching component 4 is used to disconnect the ground connection of the currently grounded lightning arrester 2 and ground the other lightning arrester 2.

[0038] Specifically, this device uses two symmetrical lightning arresters 2 to form redundant protection. Initially, only one is grounded. When an abnormal leakage current occurs, the switching component 4 can promptly isolate the faulty lightning arrester 2 and switch to the other one, ensuring power supply reliability and system safety, and preventing the fault from expanding. The monitoring component 3 monitors the leakage current in real time to provide early warning, and accurate switching reduces the risk of misoperation, clearly locates the fault, and extends the life of the lightning arrester 2.

[0039] The lightning arrester 2 of this device also integrates a disconnector 57. When the lightning arrester 2 suddenly fails, the disconnector 57 can be automatically triggered to disconnect the lightning arrester 2. During this process, the Z-shaped conductive plate 71 will not interfere with the action of the disconnector 57. It can also use the elastic force generated by the reset of the tension spring 62 to provide assistance or auxiliary drive for the action of the disconnector 57, effectively ensuring that the disconnector 57 can be smoothly and stably separated from the lightning arrester 2.

[0040] The switching assembly 4 includes an insulating housing 41 fixedly connected to the lower bracket 11. Two grounded Z-shaped conductors 42 are symmetrically arranged in the insulating housing 41. A push rod 43 is provided on one side of each Z-shaped conductor 42. The push rod 43 is made of insulating material. A sliding sleeve 44 is fixedly connected to the insulating housing 41. The push rod 43 passes through the sliding sleeve 44 and is slidably connected to the inner wall of the sliding sleeve. Moving the push rod 43 drives the Z-shaped conductor 42 to connect to the lightning arrester 2.

[0041] A drive motor 45 is fixedly connected to the insulating housing 41, and a rotating disc 46 is fixedly connected to the output shaft of the drive motor 45. A cylinder 47 is rotatably connected to one end of the push rod 43. A guide groove 48 is provided on the rotating disc 46, and one end of the cylinder 47 is located in the guide groove 48. When the drive motor 45 is started to drive the rotating disc 46 to rotate, the rotating disc 46 first drives one Z-shaped conductor to move to dock with one lightning arrester 2, then drives another Z-shaped conductor 42 to move to dock with another lightning arrester 2, and finally drives the Z-shaped conductor 42 that first docked with the lightning arrester 2 to separate from the lightning arrester 2;

[0042] Specifically, after the two lightning arresters 2 are respectively installed on the upper and lower brackets 11, the top ends of the lightning arresters 2 are electrically connected to the cable through the upper bracket 12, while the bottom ends are disconnected. The driving motor 45 is started to drive the rotating disk 46 to rotate, first causing a Z-shaped conductor 42 to move and dock with a lightning arrester 2. The lightning arrester 2 is then grounded through the leakage current meter 73, and the device enters normal working state.

[0043] During operation, if the leakage current meter 73 detects that the lightning arrester 2 has frequent overvoltages for a period of time, the program will control the drive motor 45 to rotate, driving another Z-shaped conductor 42 to connect with another lightning arrester 2. This lightning arrester 2 is directly grounded, so the leakage current meter 73 still monitors the initial lightning arrester 2. At this time, the two lightning arresters 2 are connected in parallel to jointly resist subsequent overvoltages and extend their service life. When the overvoltage returns to normal and the leakage current meter 73 shows normal current, the program controls the drive motor 45 to rotate and disconnect the subsequently connected lightning arrester 2;

[0044] If the leakage current meter 73 shows that the current is continuously abnormal, the program controls the drive motor 45 to first drive another Z-shaped conductor 42 to connect with another lightning arrester 2, and then drive the first connected Z-shaped conductor 42 to separate from the original lightning arrester 2, thereby completing the switching of the lightning arrester 2 and ensuring that the device continues to effectively protect the cable.

[0045] Guide member 1 48 includes an arcuate groove 1 49 defined on rotating disk 46 . One end of a cylinder 47 is positioned within arcuate groove 1 49 and is slidably connected to its inner wall. Rotating disk 46 defines an arcuate groove 2 51 concentric with rotating disk 46 . Arcuate groove 2 51 communicates with arcuate groove 1 49 . Furthermore, rotating disk 46 defines an arcuate groove 3 52 that communicates with arcuate groove 2 51 . During rotation of rotating disk 46 , cylinder 47 sequentially passes through arcuate groove 1 49 , arcuate groove 2 51 , and arcuate groove 3 52 , thereby driving the Z-shaped conductor connected to push rod 43 to first dock with arrester 2 , then maintain docking with arrester 2 , and finally disengage from arrester 2 .

[0046] An arc-shaped groove four 53 is provided on the rotating disk 46, which is concentric with the rotating disk 46. One end of another cylinder 47 is located in the arc-shaped groove four 53 and is slidably connected to its inner wall. An arc-shaped groove five 54 is provided on the rotating disk 46, which is connected to the arc-shaped groove four 53. The rotating disk 46 also has an arc-shaped groove six 55 concentric with the rotating disk 46. The arc-shaped groove six 55 is connected to the arc-shaped groove five 54. During the rotation of the rotating disk 46, the cylinder 47 passes through the arc-shaped groove four 53, the arc-shaped groove five 54, and the arc-shaped groove six 55 in sequence to drive the Z-shaped conductor 42 connected to the push rod 43 to first maintain a disconnected state with the lightning arrester 2, then drive it to dock with the lightning arrester 2, and finally maintain a docking state with the lightning arrester 2.

[0047] An insulating mounting plate 56 is fixedly connected to one end of the arrester 2, and the insulating mounting plate 56 is fixedly connected to the lower bracket 11. A disconnector 57 is fixedly connected to one end of the arrester 2, and a conductive stud 58 is fixedly connected to the disconnector 57, and a nut 59 is screwed onto the conductive stud 58;

[0048] One end of the Z-shaped conductor 42 adopts a C-shaped design, which is used to move the Z-shaped conductor 42 to connect with the conductive stud 58. Specifically, the Z-shaped conductor 42 is inserted into the gap between the nut 59 and the disconnector 57, and contacts and abuts against the conductive stud 58 to conduct current.

[0049] A slide rod 61 is fixedly connected to the Z-shaped conductor 42, and one end of the slide rod 61 slides through the push rod 43. A tension spring 62 is sleeved on the slide rod 61, with both ends fixed to the Z-shaped conductor 42 and the push rod 43 respectively. When the Z-shaped conductor 42 and the conductive stud 58 are in a docking state, the tension spring 62 is in an elongated state, and is used to reset the tension spring 62 when the disconnector 57 is actuated to assist in disconnecting the disconnector 57 from the lightning arrester 2. In this design, the Z-shaped conductive plate 71 will neither interfere with the action of the disconnector 57 nor provide assistance or auxiliary drive for the action of the disconnector 57 with the help of the elastic force generated by the resetting of the tension spring 62.

[0050] One end of the Z-shaped conductor 42 is fixedly connected to a hollow cylinder 63, and a sliding column 64 is slidably connected inside the hollow cylinder 63. A second guide groove 65 is opened on the inner wall of the insulating shell 41, and one end of the sliding column 64 is located in the second guide groove 65;

[0051] The second guide groove member 65 includes a horizontal groove 66 formed on the inner wall of the insulating housing 41. One end of the sliding post 64 is located in the horizontal groove 66 and is slidably connected to the inner wall. The insulating housing 41 is provided with a vertical groove 67 connected to the horizontal groove 66. The insulating housing 41 is also provided with an inclined groove 68. The ends of the inclined groove 68 are respectively connected to the horizontal groove 66 and the vertical groove 67.

[0052] The inclined chute 68 adopts a stepped design, and the step adopts an inclined surface design. The deeper part of the inclined chute 68 is the same depth as the horizontal chute 66 and the vertical chute 67, and the shallower part is connected to the horizontal chute 66 to form a step. The sliding column 64 is located in the hollow cylinder 63 and one end is fixedly connected to the spring 69. One end of the spring 69 is fixedly connected to the inner wall of the hollow cylinder 63.

[0053] Specifically, in the process of moving the push rod 43 to drive the Z-shaped conductor 42 to dock with the lightning arrester 2, the sliding column 64 can only move along the horizontal slot 66 to the vertical slot 67. Because the depth of the horizontal slot 66 is deeper than the oblique slot 68 docked with it, the Z-shaped conductor 42 moving parallel to the horizontal slot 66 can be easily inserted into the gap between the nut 59 and the disconnector 57 to complete the docking. Subsequently, if the disconnector 57 triggers the disconnection action, at this time, the sliding column 64 is located in the vertical slot 67, so the tension spring 62 can freely contract and reset, thereby driving the Z-shaped conductor 42 to dock with the disconnector. The isolator 57 moves and moves away from the lightning arrester 2, and then the sliding column 64 moves into the inclined slot 68. At the same time, the leakage current meter 73 detects that the lightning arrester 2 has no current due to disconnection, and thus drives the motor 45 to rotate through program control, thereby driving the push rod 43 and the Z-shaped conductor 42 to move and retract. During this process, the sliding column 64 slides along the inclined slot 68 and passes through the inclined surface. The inclined surface pushes the sliding column 64 and compresses the spring 69 connected to it. When the sliding column 64 docks with the horizontal slot 66, the spring 69 resets and drives the sliding column 64 to embed into the horizontal slot 66, thereby completing the reset operation.

[0054] The sliding post 64 is made of conductive material. A conductive plate 71 is provided in the insulating housing 41. The conductive plate 71 contacts and abuts against the sliding post 64. A conductive post 72 is fixedly connected to one side of the conductive plate 71.

[0055] The monitoring component 3 includes a leakage current meter 73 fixedly connected to the insulating shell 41. The leakage current meter 73 is electrically connected to the controller of the drive motor 45 and is grounded. One end of the push rod 43 corresponding to the arc groove 49 is fixedly connected to a connecting column 74. A sliding groove is provided on the insulating shell 41, and one end of the connecting column 74 slides through the sliding groove. The connecting column 74 is designed with an insulating material. One end of the connecting column 74 is fixedly connected to a connecting plate 75. A docking plate 76 is provided on one side of each of the two conductive columns 72. A connecting column 74 is also fixedly connected between the docking plate 76 and the connecting plate 75. The docking plate 76 is grounded through a wire.

[0056] A second docking plate 77 is provided on one side of each of the two conductive posts 72. A connecting post 74 is also fixedly connected between the second docking plate 77 and the connecting plate 75. The second docking plate 77 is electrically connected to the leakage current meter 73 via a wire. When the Z-shaped conductor 42 corresponding to the arc-shaped slot 1 49 is driven to dock with the lightning arrester 2, the conductive post 72 corresponding to the Z-shaped conductor 42 only contacts the second docking plate 77, while the conductive post 72 corresponding to the other Z-shaped conductor 42 only contacts the first docking plate 76.

[0057] Specifically, docking plate 1 76 is directly grounded, while docking plate 2 77 is grounded via the leakage current meter 73. With this design, no matter what the docking state of the two arresters 2 and the cable is, only one arrester 2 in use is always connected to the leakage current meter 73, thereby improving the monitoring accuracy.

[0058] There are three specific docking states. The first is that the first arrester 2 is in use while the second arrester 2 is not in use. At this time, the Z-shaped conductor 42 docked with the first arrester 2 is docked with the second docking plate 77, that is, the first arrester 2 is grounded through the leakage current meter 73.

[0059] The second method is that both the first lightning arrester 2 and the second lightning arrester 2 are put into use. At this time, the first lightning arrester 2 is still grounded through the leakage current meter 73, and the Z-shaped conductor 42 connected to the second lightning arrester 2 is connected to the docking plate 1 76, that is, the second lightning arrester 2 is directly grounded. Because the first lightning arrester 2 is used for a long time when the device is working normally, the probability of its damage is greater. Therefore, the leakage current meter 73 is used to strictly monitor it in real time to detect problems in time.

[0060] The third type is that the first lightning arrester 2 is damaged and not in use, while the second lightning arrester 2 is put into use. At this time, the Z-shaped conductor 42 docked with the second lightning arrester 2 is docked with the docking plate 2 77, so that the leakage current meter 73 can monitor the second lightning arrester 2 in real time.

[0061] Example 2: Please refer to Figures 1-9 , the present invention provides a technical solution: Example 2 is optimized based on Example 1;

[0062] A ring body 78 is rotatably connected to the nut 59, and a rope body 79 is fixedly connected between the ring body 78 and the insulating mounting plate 56. After the disconnector 57 is actuated, the rope body 79 can pull the fragments of the disconnector 57 to prevent them from falling.

[0063] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0064] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A lightning arrester protection device, comprising a composite post insulator (1), wherein a lower bracket (11) and an upper bracket (12) are respectively installed at both ends of the composite post insulator (1), characterized in that: Also included are: Two lightning arresters (2) are symmetrically arranged on the upper bracket (12) and electrically connected to the cable through the upper bracket (12); A monitoring component (3), arranged on the lower bracket (11) and electrically connected to the lightning arrester (2), for monitoring leakage current of the lightning arrester (2); A switching component (4) is arranged on the lower bracket (11) and is connected to the monitoring component (3). In an initial state, only one of the lightning arresters (2) is grounded. When the monitoring component (3) detects that the leakage current of the lightning arrester (2) is continuously abnormal, the switching component (4) is used to disconnect the ground connection of the currently grounded lightning arrester (2) and ground the other lightning arrester (2). The switching assembly (4) includes an insulating housing (41) disposed on a lower bracket (11), two grounded Z-shaped conductors (42) are symmetrically disposed in the insulating housing (41), a push rod (43) is disposed on one side of the Z-shaped conductor (42), the push rod (43) is made of an insulating material, a sliding sleeve (44) is fixedly connected to the insulating housing (41), the push rod (43) passes through the sliding sleeve (44) and is slidably connected to the inner wall thereof, and the push rod (43) is moved, thereby driving the Z-shaped conductor (42) to connect to the lightning arrester (2); A driving motor (45) is fixedly connected to the insulating housing (41), a rotating disc (46) is fixedly connected to the output shaft of the driving motor (45), one end of the push rod (43) is rotatably connected to a cylinder (47), a guide groove member (48) is provided on the rotating disc (46), one end of the two cylinders (47) are both located in the guide groove member (48), and when the driving motor (45) is started to drive the rotating disc (46) to rotate, the rotating disc (46) first drives a Z-shaped conductor (42) to move to dock with one lightning arrester (2), then drives another Z-shaped conductor (42) to move to dock with another lightning arrester (2), and finally drives the Z-shaped conductor (42) that first docks with the lightning arrester (2) to detach from the lightning arrester (2).

2. The lightning arrester protection device according to claim 1, characterized in that: The guide groove member 1 (48) includes an arc groove 1 (49) provided on the rotating disc (46), one end of the cylinder (47) is located in the arc groove 1 (49) and is slidably connected to the inner wall thereof, the rotating disc (46) is provided with an arc groove 2 (51) which is concentric with the rotating disc (46), the arc groove 2 (51) is connected to the arc groove 1 (49), and the rotating disc (46) is provided with an arc groove 3 (52) which is connected to the arc groove 2 (51), and in the process of rotating the rotating disc (46), the cylinder (47) passes through the arc groove 1 (49), the arc groove 2 (51), and the arc groove 3 (52) in sequence to drive the Z-shaped conductor (42) to first dock with the lightning arrester (2), then maintain the docking state with the lightning arrester (2), and finally detach from the lightning arrester (2); The rotating disc (46) is provided with an arc groove four (53) which is concentric with the rotating disc (46), one end of another cylinder (47) is located in the arc groove four (53) and is slidably connected to the inner wall thereof, the rotating disc (46) is provided with an arc groove five (54) which is connected to the arc groove four (53), and the rotating disc (46) is provided with an arc groove six (55) which is concentric with the rotating disc (46), the arc groove six (55) is connected to the arc groove five (54), and in the process of rotating the rotating disc (46), the cylinder (47) passes through the arc groove four (53), the arc groove five (54), and the arc groove six (55) in sequence to drive the Z-shaped conductor (42) to maintain a disconnected state with the lightning arrester (2), then drive it to dock with the lightning arrester (2), and finally maintain a docking state with the lightning arrester (2).

3. The lightning arrester protection device according to claim 2, characterized in that: One end of the lightning arrester (2) is fixedly connected to an insulating mounting plate (56), the insulating mounting plate (56) is fixedly connected to the lower bracket (11), and one end of the lightning arrester (2) is fixedly connected to a disconnector (57), the disconnector (57) is fixedly connected to a conductive stud (58), and a nut (59) is screwed onto the conductive stud (58); One end of the Z-shaped conductor (42) is designed in a C shape, which is used to move the Z-shaped conductor (42) to connect with the conductive stud (58).

4. The lightning arrester protection device according to claim 3, characterized in that: A slide rod (61) is fixedly connected to the Z-shaped conductor (42), one end of the slide rod (61) slides through the push rod (43), and a tension spring (62) is sleeved on the slide rod (61), the two ends of which are respectively fixed to the Z-shaped conductor (42) and the push rod (43). When the Z-shaped conductor (42) and the conductive stud (58) are in a docking state, the tension spring (62) is in an extended state, and is used for resetting the tension spring (62) when the disconnector (57) is actuated to assist in driving the disconnector (57) to disconnect from the lightning arrester (2).

5. The lightning arrester protection device according to claim 4, characterized in that: One end of the Z-shaped conductor (42) is fixedly connected to a hollow cylinder (63), and a sliding column (64) is slidably connected inside the hollow cylinder (63). A second guide groove (65) is provided on the inner wall of the insulating shell (41), and one end of the sliding column (64) is located in the second guide groove (65). When the push rod (43) is moved to drive the Z-shaped conductor (42) to dock with the conductive stud (58), the sliding column (64) slides in the second guide groove (65) to maintain the tension state of the tension spring (62); After the disengagement device (57) is actuated, the tension spring (62) is lengthened by the sliding of the sliding post (64) in the second guide groove member (65) during the process of moving the push rod (43) to drive the Z-shaped conductor (42) to be recovered.

6. The lightning arrester protection device according to claim 5, characterized in that: The second guide groove member (65) includes a horizontal slide groove (66) provided on the inner wall of the insulating shell (41), one end of the sliding column (64) is located in the horizontal slide groove (66) and is slidably connected to the inner wall thereof, the insulating shell (41) is provided with a vertical slide groove (67) connected to the horizontal slide groove (66), and the insulating shell (41) is provided with an inclined slide groove (68), and the two ends of the inclined slide groove (68) are respectively connected to the horizontal slide groove (66) and the vertical slide groove (67); The inclined chute (68) adopts a stepped design, and the step adopts an inclined surface design. The deeper part of the inclined chute (68) is the same depth as the horizontal chute (66) and the vertical chute (67), and the shallower part is connected to the horizontal chute (66) to form a step. The sliding column (64) is located in the hollow cylinder (63) and one end is fixedly connected to the spring (69). One end of the spring (69) is fixed to the inner wall of the hollow cylinder (63).

7. The lightning arrester protection device according to claim 6, characterized in that: The sliding column (64) is designed with a conductive material, and a conductive plate (71) is provided in the insulating housing (41). The conductive plate (71) contacts and abuts against the sliding column (64), and a conductive column (72) is fixedly connected to one side of the conductive plate (71); The monitoring component (3) includes a leakage current meter (73) fixedly connected to the insulating housing (41), the leakage current meter (73) is electrically connected to the controller of the drive motor (45), and the leakage current meter (73) is grounded. One end of the push rod (43) corresponding to the arc groove (49) is fixedly connected to a connecting column (74), the connecting column (74) is designed with an insulating material, and one end of the connecting column (74) is fixedly connected to a connecting plate (75). A docking plate (76) is provided on one side of each of the two conductive columns (72), and a connecting column (74) is also fixedly connected between the docking plate (76) and the connecting plate (75), and the docking plate (76) is grounded through a wire.

8. The lightning arrester protection device according to claim 7, characterized in that: A docking plate 2 (77) is provided on one side of each of the two conductive columns (72), and a connecting column (74) is also fixedly connected between the docking plate 2 (77) and the connecting plate (75). The docking plate 2 (77) is electrically connected to the leakage current meter (73) through a wire. When the Z-shaped conductor (42) corresponding to the arc-shaped slot 1 (49) is driven to dock with the lightning arrester (2), the conductive column (72) corresponding to the Z-shaped conductor (42) is only in contact with the docking plate 2 (77), and the conductive column (72) corresponding to the other Z-shaped conductor (42) is only in contact with the docking plate 1 (76).

9. The lightning arrester protection device according to claim 8, characterized in that: A ring body (78) is rotatably connected to the nut (59), and a rope body (79) is fixedly connected between the ring body (78) and the insulating mounting plate (56).

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