Lightning arrester leakage current detection device

Abstract

A lightning arrester leakage current detection device relates to the technical field of electrical equipment detection and comprises a leakage current detector shell, a cleaning part, a starting part and a lightning arrester. The cleaning part and the starting part are both fixedly installed on the ground, the cleaning part is fixedly connected with the starting part, and the cleaning part and the starting part are arranged outside the lightning arrester in a sleeving mode; the cleaning part further comprises a water tank, an arc-shaped outer frame, a rectangular water spraying head, a connecting rod support, a limiting round rod, a strip-shaped supporting rod, an arc-shaped plate, a dryer, a collecting box, a semicircular sponge block and a small notch. According to the equipment, the cleaning part is used for cleaning the outer side of the lightning arrester, the influence of the external environment on a detection result is reduced to the greatest extent, and manual operation is reduced by constructing an intelligent monitoring system, so that real-time monitoring and early warning of the operation state of the lightning arrester are realized, the operation and maintenance efficiency is improved, and uninterruptible power detection is realized.

Description

Technical Field

[0001] This utility model relates to the field of power equipment testing technology, and in particular to a surge arrester leakage current detection device. Background Technology

[0002] The main function of a surge arrester is to quickly conduct current to the ground during overvoltage, thus protecting the equipment from damage. However, due to the complex working environment of surge arresters, there are inconsistencies between local and remote data in the live detection of the health status of surge arresters. Existing surge arrester leakage current sensors face problems such as the need to disassemble the surge arrester and large errors in leakage current measurement accuracy.

[0003] Therefore, a new type of surge arrester leakage current detection device is needed. Compared with traditional surge arrester leakage current detection devices that typically use the full current method for measurement, this method, although simple and easy to implement, has high power consumption and is susceptible to phase-to-phase interference. In contrast, this device uses a resistive current measurement and calculation method to separate the resistive current component through an algorithm. It does not require continuous monitoring of the full current signal, but only needs to sample and calculate at specific times, thereby significantly reducing the overall power consumption of the device. Furthermore, this device is directly fitted onto the outside of the surge arrester, facilitating real-time monitoring without the need for manual operation, thus reducing labor costs. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a surge arrester leakage current detection device to solve these issues.

[0005] To address the aforementioned issues, this utility model provides a surge arrester leakage current detection device, comprising: a leakage current detector housing, a cleaning section, a starting section, and a surge arrester instrument;

[0006] Both the cleaning section and the starting section are fixedly installed on the ground, and the cleaning section and the starting section are fixedly connected. The cleaning section and the starting section are fitted onto the outside of the lightning protection instrument.

[0007] The cleaning components also include: a water tank, an arc-shaped external frame, a rectangular spray nozzle, a connecting rod bracket, a limiting round rod, a strip-shaped support rod, an arc-shaped plate, a dryer, a collection box, a semi-circular sponge block, and a small notch;

[0008] Each of the aforementioned arc-shaped external frames has an internal cavity, and an arc-shaped plate is fixedly installed on the front end face of each arc-shaped external frame; there are four rectangular water spray heads, which are divided into two groups, with two rectangular water spray heads in each group. The two rectangular water spray heads in each group are symmetrically distributed, and the two rectangular water spray heads in each group are connected to a water tank on the same side through pipes. There are two water tanks, and the two water tanks are fixedly installed on the connecting support frame respectively; there are two connecting rod supports, which are symmetrically distributed. The long plate on each connecting rod support is slidably installed on an arc-shaped external frame on the same side. The vertical long plate of the connecting rod support is fixedly connected to the rods at the rear ends of multiple strip support rods. A limiting round rod is fixedly installed at the upper and lower ends of the vertical long plate of the connecting rod support, and each limiting round rod is slidably installed in the arc-shaped groove of the central disc at the corresponding position; there are multiple strip support rods, and a semi-circular sponge block is fixedly connected to the front end of each strip support rod; there are multiple small notches, which are respectively set on the arc-shaped plate, and the diameter of each support is smaller than the volume of the semi-circular sponge block;

[0009] The starting part also includes: a second cylindrical gear, a swing rectangular plate, a connecting shaft, a swing groove rod, a sliding long rod, a rectangular long plate, and a short spring;

[0010] There are two second cylindrical gears, each rotatably mounted on a connecting support frame. The shafts of the two second cylindrical gears are fixedly connected to each other, and each second cylindrical gear meshes with a larger gear on the same side. There are also two oscillating rectangular plates, symmetrically distributed. Each oscillating rectangular plate is rotatably mounted on the connecting support frame. Each oscillating rectangular plate has a circular hole at its center, and a short spring is fixedly connected to both sides of each oscillating rectangular plate. There are four short springs in total, divided into two groups of two, with each group containing two short springs symmetrically distributed. The other end of each short spring is fixedly connected to the connecting support frame; there are two connecting shafts, each of which is fixedly connected to a second cylindrical gear on the same side. Each connecting shaft passes through a circular hole at the center of a swing rectangular plate on the same side and is fixedly connected to a swing groove rod. There are two swing groove rods, which are symmetrically distributed. Each swing groove rod is provided with a sliding groove, which is slidably connected to a sliding long rod on the same side. Each sliding long rod is slidably installed in a groove of a rectangular long plate on the same side. The sliding long rod is intermittently engaged with a small slot on the same side. The rectangular long plate is fixedly installed on the connecting support frame.

[0011] Preferably, the cleaning component includes: a central disc, a large gear, and a cylindrical support;

[0012] There are two central discs, each with a large gear fixedly installed on it. Each central disc has two arc-shaped sliding grooves, which are symmetrically distributed. A cylindrical support is fixedly installed between the two central discs, and the cylindrical support has multiple through grooves.

[0013] Preferably, the water tank has an internal filtration device.

[0014] Preferably, the cleaning part further includes: a support;

[0015] The bracket is fixedly connected to the inner side of two central discs, and two arc-shaped external frames are fixedly installed inside the bracket.

[0016] Preferably, the collection box is fixedly installed at the bottom of the arc-shaped external frame.

[0017] Preferably, the starting part includes: a connecting support frame, a motor, and a first cylindrical gear;

[0018] The lower end of the connecting support frame is provided with a circular screw; the motor is installed on the connecting support frame by screws and nuts, the motor shaft is fixedly connected to the first cylindrical gear, and the first cylindrical gear meshes with one of the second cylindrical gears.

[0019] Preferably, the starting part further includes: a connecting plate, a small slot, a connecting frame, a small spring, a battery clamp, and a digital leakage current meter for the surge arrester;

[0020] There are two connecting plates, each fixedly connected to the connecting outer frame. Both connecting plates are slidably installed in holes on the connecting support frame. The two connecting plates are symmetrically distributed, and each connecting plate has a small slot. There are two small springs, one end of each small spring is fixedly connected to the connecting outer frame, and the other end of each small spring is fixedly connected to a plate on the connecting support frame. There are two battery clamps, both of which are open and fixedly installed on the connecting outer frame. Each battery clamp is connected to the digital leakage current meter of the surge arrester via a wire.

[0021] Preferably, the digital leakage current meter of the surge arrester is fixedly installed on the housing of the leakage current detector, and a portion of the digital leakage current meter of the surge arrester is exposed on the outside of the housing of the leakage current detector.

[0022] The advantages of this utility model compared to existing technologies are:

[0023] 1. Traditional surge arrester leakage current detection devices typically use the full current method for measurement. While this method is simple and easy to implement, it has high power consumption and is susceptible to phase-to-phase interference. In contrast, this device uses a resistive current measurement and calculation method to separate the resistive current component through an algorithm. It does not require continuous monitoring of the full current signal; it only needs to sample and calculate at specific times, thereby significantly reducing the overall power consumption of the device. Furthermore, this device is directly fitted onto the outside of the surge arrester, facilitating real-time monitoring without the need for manual operation, thus reducing labor costs.

[0024] This device adopts an innovative external design. It can be sleeved on the outside of the surge arrester while the surge arrester is being installed. Then, the leakage current detector housing is fixed in a specific position using tools, and the device can be securely installed in the designated location. No complicated tools or professional skills are required, and ordinary personnel can easily complete the installation, which greatly shortens the installation time and improves work efficiency. Moreover, the external design does not require any changes to the existing surge arrester structure and is suitable for surge arresters of various models and specifications, making it convenient for widespread application.

[0025] Traditional surge arrester leakage current detection devices are easily affected by the external environment, especially surface contamination, which leads to a decrease in detection accuracy. The device has a built-in cleaning component that can clean the surface of the surge arrester periodically or according to preset conditions, effectively removing dirt, dust and other adhering substances, avoiding their interference with leakage current measurement, further improving detection accuracy, extending the service life of the surge arrester, and reducing manual maintenance costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0027] Figure 2 This is a first-angle schematic diagram of the internal structure of the overall structure of this utility model.

[0028] Figure 3 This is a second-angle schematic diagram of the internal structure of the overall structure of this utility model.

[0029] Figure 4 This is a schematic diagram of the cleaning section of this utility model.

[0030] Figure 5 This is a schematic diagram of most of the structure of the cleaning section of this utility model.

[0031] Figure 6 This is a schematic diagram of a portion of the cleaning section of this utility model.

[0032] Figure 7 This is a schematic diagram of a small part of the cleaning section of this utility model.

[0033] Figure 8 This is a schematic diagram of the startup section of this utility.

[0034] Figure 9 For practical purposes Figure 8 A schematic diagram of the enlarged structure at point A.

[0035] Figure 10 This is a partial structural diagram of the startup section of this utility model.

[0036] Reference numerals: 1. Leakage current detector housing; 2. Cleaning section; 3. Starting section; 4. Lightning protection instrument; 201. Central disc; 202. Large gear; 203. Water tank; 204. Bracket; 205. Arc-shaped external frame; 206. Rectangular spray head; 207. Linkage bracket; 208. Limiting rod; 209. Strip support rod; 210. Arc-shaped plate; 211. Dryer; 212. Collection box; 213. Semi-circular sponge block; 214. Small notch; 215. Cylindrical bracket; 301. Connecting support frame; 302. Motor; 303. First cylindrical gear; 304. Second cylindrical gear; 305. Swinging rectangular plate; 306. Connecting shaft; 307. Swinging grooved rod; 308. Sliding long rod; 309. Rectangular long plate; 310. Connecting plate; 311. Small slot; 312. Connecting outer frame; 313. Small spring; 314. Battery clamp; 315. Digital leakage current meter for surge arrester; 316. Short spring. Detailed Implementation

[0037] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0038] In this description, it should be noted that the terms "upper," "lower," "front," "back," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the purpose of simplifying the description of this utility patent and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility patent. Furthermore, for ease of explanation, spatial relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the accompanying drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein can be interpreted accordingly. It should be noted that, in this document, some connection methods, such as "fixed connection" and "fixed installation," refer to fixing two components together through methods including but not limited to welding, fixing with screws and nuts, gluing, riveting, and interference fit. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0039] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0040] Implementation, for example Figures 1-10 As shown, a surge arrester leakage current detection device includes: a leakage current detector housing 1, a cleaning part 2, an activation part 3, and a surge arrester instrument 4;

[0041] Both the cleaning part 2 and the starting part 3 are fixedly installed on the ground. The cleaning part 2 and the starting part 3 are fixedly connected. The cleaning part 2 and the starting part 3 are fitted onto the outside of the lightning protection instrument 4.

[0042] The cleaning section 2 also includes: a water tank 203, an arc-shaped external frame 205, a rectangular spray head 206, a connecting rod bracket 207, a limiting round rod 208, a strip support rod 209, an arc-shaped plate 210, a dryer 211, a collection box 212, a semi-circular sponge block 213, and a small notch 214;

[0043] Each arc-shaped outer frame 205 has an internal cavity, and an arc-shaped plate 210 is fixedly installed on the front end face of each arc-shaped outer frame 205; there are four rectangular water nozzles 206, which are divided into two groups, with two rectangular water nozzles 206 in each group. The two rectangular water nozzles 206 in each group are symmetrically distributed, and the two rectangular water nozzles 206 in each group are connected to a water tank 203 on the same side through pipes. There are two water tanks 203, and the two water tanks 203 are fixedly installed on the connecting support frame 301 respectively; there are two connecting rod brackets 207, which are symmetrically distributed, and the long plate on each connecting rod bracket 207 slides... The connecting rod bracket 207 is mounted on an arc-shaped external frame 205 on the same side. The vertical long plate of the connecting rod bracket 207 is fixedly connected to the rods at the rear ends of multiple strip-shaped support rods 209. A limiting round rod 208 is fixedly installed at the upper and lower ends of the vertical long plate of the connecting rod bracket 207. Each limiting round rod 208 is slidably installed in the arc-shaped groove of the central disc 201 at the corresponding position. There are multiple strip-shaped support rods 209, and a semi-circular sponge block 213 is fixedly connected to the front end of each strip-shaped support rod 209. There are multiple small notches 214, and multiple small notches 214 are respectively set on the arc-shaped plate 210. The diameter of each bracket 204 is smaller than the volume of the semi-circular sponge block 213.

[0044] The starting part 3 also includes: a second cylindrical gear 304, a swing rectangular plate 305, a connecting shaft 306, a swing groove rod 307, a sliding long rod 308, a rectangular long plate 309, and a short spring 316;

[0045] There are two second cylindrical gears 304, each rotatably mounted on the connecting support frame 301. The shafts of the two second cylindrical gears 304 are fixedly connected to each other, and each second cylindrical gear 304 meshes with a large gear 202 on the same side. There are also two swing rectangular plates 305, symmetrically distributed, each rotatably mounted on the connecting support frame 301. Each swing rectangular plate 305 has a circular hole at its center, and a short spring 316 is fixedly connected to both sides of each swing rectangular plate 305. There are four short springs 316, divided into two groups, with each group containing two short springs 316. In each group, two short springs 316 are symmetrically distributed, and the other end of each short spring 316 is fixedly connected to the connecting support frame 301. There are two connecting shafts 306, each of which is fixedly connected to a second cylindrical gear 304 on the same side. Each connecting shaft 306 passes through a circular hole at the center of a swing rectangular plate 305 on the same side and is fixedly connected to a swing groove rod 307. There are two swing groove rods 307, which are symmetrically distributed. Each swing groove rod 307 is provided with a sliding groove, which is slidably connected to a sliding long rod 308 on the same side. Each sliding long rod 308 is slidably installed in a groove of a rectangular long plate 309 on the same side. The rod 308 intermittently engages with a small slot 311 on the same side, and the rectangular plate 309 is fixedly installed on the connecting support frame 301. Specifically, the motor 302 drives the first cylindrical gear 303 to rotate, which in turn drives the second cylindrical gear 304 to rotate, which in turn drives the large gear 202 to rotate, further driving the central disk 201 to rotate, which in turn drives the arc-shaped sliding groove on the central disk 201 to rotate, thereby driving the limiting rod 208 to move, further driving the connecting rod bracket 207 to move, which in turn drives the strip support rod 209 and the semi-circular sponge block 213 to move. After the semi-circular sponge block 213 is pushed out and comes into contact with the lightning protection instrument 4, the large gear 202 continues to rotate, and then the central... The arc-shaped groove on the disc 201 continues to rotate. When the limiting rod 208 moves to the tail of the arc-shaped groove on the central disc 201, the limiting rod 208 can no longer move. At this moment, as the large gear 202 continues to rotate, it will drive the central disc 201 to rotate, which will in turn drive the limiting rod 208 to rotate together. This will drive the connecting rod bracket 207, the strip support rod 209, and the semi-circular sponge block 213 to rotate by an acute angle, so that the semi-circular sponge block 213 can rotate and clean the outside of the leakage current detector housing 1, thereby improving the cleaning effect. Then the motor 302 reverses, thereby driving the limiting rod 208 back to its original position, and then causing the semi-circular sponge block 213 to return to the inside of the arc-shaped outer frame 205.The motor 302 drives the first cylindrical gear 303 to rotate, which in turn drives the second cylindrical gear 304 to rotate, thereby causing the semi-circular sponge block 213 to return to the interior of the arc-shaped outer frame 205. Subsequently, the motor 302 continues to drive the first cylindrical gear 303 to rotate, which in turn drives the second cylindrical gear 304 to rotate, thereby driving the connecting shaft 306 and the swing groove rod 307 to rotate, which in turn causes the sliding rod 308 to move and insert into the small slot 311. Since there is a certain distance between the sliding rod 308 and the small slot 311, the semi-circular sponge block 213 is pushed back into the arc-shaped outer frame 205. During the cleaning of the outside of the lightning arrester 4 by the circular sponge block 213, the sliding rod 308 cannot engage with the small slot 311 because the rotation amplitude of the second cylindrical gear 304 is small. At this moment, after the sliding rod 308 is inserted into the small slot 311, as the second cylindrical gear 304 continues to drive the connecting shaft 306 and the swinging groove rod 307 to swing, when the swinging groove rod 307 rotates to touch the rectangular plate 309, the swinging groove rod 307 is blocked by the rectangular plate 309 and cannot continue to rotate. However, at this moment, the second cylindrical gear 304... 04 continues to drive the connecting shaft 306 and the swing groove rod 307 to rotate. The connecting shaft 306 passes through the circular hole at the center of the swing rectangular plate 305, which is rotatably mounted on the connecting support frame 301. Therefore, the swing groove rod 307 pushes the rectangular long plate 309, which in turn pushes the swing rectangular plate 305 to rotate, thereby driving the sliding long rod 3087 to rotate. This further drives the small slot 311 and the connecting plate 310 to move, thereby driving the connecting outer frame 312 and the battery clamp 314 to move, so that the battery clamp 314 contacts the lightning protection instrument 4. The digital leakage current meter 315 enables the surge arrester to detect the surge arrester instrument 4. Since the digital leakage current meter 315 can perform continuous power-off detection of the surge arrester instrument 4, it achieves continuous power-off detection, reducing hardware and maintenance costs. Simultaneously, it can be easily integrated with other power equipment monitoring systems to achieve comprehensive monitoring. The second cylindrical gear 304 reverses, causing the sliding rod 308 to disengage from the small slot 311. Subsequently, the small slot 311 and the connecting frame 312 are pulled back to their original positions by the tension of the small spring 313, facilitating the next detection.

[0046] In one optional embodiment of this utility model, such as Figure 4 As shown, the cleaning part 2 includes: a central disc 201, a large gear 202, and a cylindrical support 215;

[0047] There are two central discs 201, each with a large gear 202 fixedly installed on it. Each central disc 201 has two arc-shaped sliding grooves, which are symmetrically distributed. A cylindrical support 215 is fixedly installed between the two central discs 201, and the cylindrical support 215 has multiple through grooves. This equipment is equipped with only one power source, a motor 302, which simplifies the mechanical structure, reduces the number of parts, lowers assembly difficulty and maintenance costs, and improves efficiency while reducing energy consumption.

[0048] In one optional embodiment of this utility model, such as Figure 4 , Figure 5 As shown, water tank 203 has a filter device inside.

[0049] In one optional embodiment of this utility model, such as Figure 4 , Figure 5 As shown, the cleaning section 2 also includes: a support 204;

[0050] The bracket 204 is fixedly connected to the inner side of the two central discs 201, and two arc-shaped external frames 205 are fixedly installed inside the bracket 204.

[0051] The collection box 212 is fixedly installed at the bottom of the arc-shaped external frame 205. The collection box 212 is connected to the water tank 203 through a pipe. The pump inside the water tank 203 can draw water from the collection box 212 into the water tank 203, filter it, and then deliver it to the rectangular spray head 206.

[0052] In one optional embodiment of this utility model, such as Figure 8 As shown, the starting part 3 includes: a connecting support frame 301, a motor 302, and a first cylindrical gear 303;

[0053] The lower end of the connecting support frame 301 is provided with a round screw. The round screw makes it easy to manually install the entire device inside the leakage current detector housing 1 using a nut, and makes it easy to remove the lightning protection instrument 4 for separate maintenance. The motor 302 is installed on the connecting support frame 301 by screws and nuts. The shaft of the motor 302 is fixedly connected to the first cylindrical gear 303, and the first cylindrical gear 303 meshes with one of the second cylindrical gears 304.

[0054] In one optional embodiment of this utility model, such as Figure 8 , Figure 9 , Figure 10 As shown, the starting part 3 also includes: a connecting plate 310, a small card slot 311, a connecting frame 312, a small spring 313, a battery clamp 314, and a digital leakage current meter for the surge arrester 315;

[0055] There are two connecting plates 310, which are fixedly connected to the connecting outer frame 312 respectively. Both connecting plates 310 are slidably installed in the holes on the connecting support frame 301. The two connecting plates 310 are symmetrically distributed, and each connecting plate 310 has a small slot 311. There are two small springs 313, one end of each small spring 313 is fixedly connected to the connecting outer frame 312, and the other end of each small spring 313 is fixedly connected to the plate on the connecting support frame 301. There are two battery clamps 314, both of which are open. Both battery clamps 314 are fixedly installed on the connecting outer frame 312, and each battery clamp 314 is connected to the digital leakage current meter 315 of the surge arrester through wires.

[0056] In one optional embodiment of this utility model, such as Figure 8 , Figure 9 , Figure 10 As shown, the digital leakage current meter 315 of the surge arrester is fixedly installed on the housing 1 of the leakage current detector, and part of the digital leakage current meter 315 of the surge arrester is exposed on the outside of the housing 1 of the leakage current detector. The digital leakage current meter 315 of the surge arrester enables uninterrupted detection, and at the same time, it eliminates the need to repeatedly disassemble the detection equipment and the surge arrester instrument 4, thereby reducing hardware costs and maintenance costs.

[0057] Working principle:

[0058] Traditional surge arrester leakage current detection devices typically use the full current method for measurement. While this method is simple and easy to implement, it has high power consumption and is susceptible to phase-to-phase interference. In contrast, this device uses a resistive current measurement and calculation method to separate the resistive current component through an algorithm. It does not require continuous monitoring of the full current signal; sampling and calculation are only performed at specific times, thereby significantly reducing the overall power consumption of the device. Furthermore, this device is directly fitted onto the outside of the surge arrester instrument 4, facilitating real-time monitoring without the need for manual operation, thus reducing labor costs.

[0059] Moreover, the resistive current-based measurement and calculation method can detect the deterioration of the surge arrester's insulation performance earlier and more accurately, promptly identify potential faults, and improve the safety and reliability of the power system. At the same time, the cleaning section 2 is used to clean the outside of the surge arrester 4, minimizing the impact of the external environment on the test results. Furthermore, by constructing an intelligent monitoring system, manual operation is reduced, which not only enables real-time monitoring and early warning of the surge arrester's operating status, improving operation and maintenance efficiency, but also achieves uninterrupted power testing. In addition, it eliminates the need for repeated disassembly of the testing equipment and the surge arrester 4, reducing hardware and maintenance costs.

[0060] First, this device adopts an innovative external design. While installing the surge arrester 4, the device can be sleeved on the outside of the surge arrester 4. Then, by using tools to fix the leakage current detector housing 1 in a specific position, the device can be securely installed in the designated location. No complicated tools or professional skills are required, and ordinary personnel can easily complete the installation, which greatly shortens the installation time and improves work efficiency. Moreover, the external design does not require changes to the existing surge arrester structure and is suitable for surge arresters of various models and specifications, making it convenient for promotion and application.

[0061] Traditional surge arrester leakage current detection devices are easily affected by the external environment, especially surface dirt, which leads to a decrease in detection accuracy. The device has a built-in cleaning section 2, which can clean the surface of the surge arrester periodically or according to preset conditions, effectively removing dirt, dust and other attachments, avoiding their interference with leakage current measurement, further improving detection accuracy, extending the service life of the surge arrester, and reducing manual maintenance costs.

[0062] To improve the cleaning effect, the semi-circular sponge block 213 is initially located inside the arc-shaped outer frame 205. Water is introduced from the pipe into the rectangular spray head 206 through the water tank 203. The water sprayed from the rectangular spray head 206 wets the semi-circular sponge block 213. Then, the connecting rod bracket 207 pushes the strip support rod 209, thereby moving the semi-circular sponge block 213 out of the arc-shaped outer frame 205. Since the diameter of the arc plate 210 is smaller than the volume of the semi-circular sponge block 213, when the strip support rod 209 pushes the semi-circular sponge block 213 out, it will squeeze the semi-circular sponge block 213 and squeeze out the excess water inside the semi-circular sponge block 213.

[0063] The motor 302 drives the first cylindrical gear 303 to rotate, which in turn drives the second cylindrical gear 304 to rotate, which in turn drives the large gear 202 to rotate, further driving the central disk 201 to rotate. This causes the arc-shaped groove on the central disk 201 to rotate, which in turn drives the limiting rod 208 to move, further driving the connecting rod bracket 207 to move, which in turn drives the strip support rod 209 and the semi-circular sponge block 213 to move. After the semi-circular sponge block 213 is pushed out and comes into contact with the lightning arrester 4, the large gear 202 continues to rotate, and the arc-shaped groove on the central disk 201 also continues to rotate. When the limiting rod 208 moves to the tail of the arc-shaped groove on the central disk 201, the limiting rod 208 can no longer move. At this moment, as the large gear 202 continues to rotate, it will drive the central disk 201 to rotate. The rotation of the motor 302 causes the limiting rod 208 to rotate, which in turn causes the connecting rod bracket 207, the strip support rod 209, and the semi-circular sponge block 213 to rotate sharply. This allows the semi-circular sponge block 213 to rotate and clean the outside of the leakage current detector housing 1, improving the cleaning effect. Then, the motor 302 reverses, causing the limiting rod 208 to return to its original position, which in turn causes the semi-circular sponge block 213 to return to the inside of the arc-shaped outer frame 205. After the semi-circular sponge block 213 is wetted and pushed out to clean the outside of the lightning arrester 4, it is pulled back into the arc-shaped outer frame 205. Then, the dryer 211 dries the semi-circular sponge block 213. Finally, the semi-circular sponge block 213 is pushed out and used to wipe and clean the outside of the lightning arrester 4.

[0064] The motor 302 drives the first cylindrical gear 303 to rotate, which in turn drives the second cylindrical gear 304 to rotate, thereby causing the semi-circular sponge block 213 to return to the interior of the arc-shaped outer frame 205. Subsequently, the motor 302 continues to drive the first cylindrical gear 303 to rotate, which in turn drives the second cylindrical gear 304 to rotate, thereby driving the connecting shaft 306 and the swing groove rod 307 to rotate, which in turn causes the sliding rod 308 to move and insert into the small slot 311. Since there is a certain distance between the sliding rod 308 and the small slot 311, the above-mentioned pushing of the semi-circular sponge block 213 affects the lightning protection instrument. 4. During the cleaning process on the outside, because the rotation amplitude of the second cylindrical gear 304 is small, the sliding rod 308 cannot engage with the small slot 311. At this moment, after the sliding rod 308 is inserted into the small slot 311, as the second cylindrical gear 304 continues to drive the connecting shaft 306 and the swinging groove rod 307 to swing, when the swinging groove rod 307 rotates to touch the rectangular plate 309, the swinging groove rod 307 is blocked by the rectangular plate 309 and cannot continue to rotate. However, at this moment, the second cylindrical gear 304 is still driving the connecting shaft 306 and the swinging groove rod 307 to rotate, and the connecting... The connecting shaft 306 passes through the circular hole at the center of the swing rectangular plate 305. The swing rectangular plate 305 is rotatably mounted on the connecting support frame 301. Therefore, the swing groove rod 307 pushes the rectangular long plate 309, which in turn pushes the swing rectangular plate 305 to rotate, thereby driving the sliding long rod 308 to rotate. This further drives the small slot 311 and the connecting plate 310 to move, thereby driving the connecting outer frame 312 and the battery clamp 314 to move, so that the battery clamp 314 contacts the surge arrester 4. This allows the surge arrester digital leakage current meter 315 to detect the surge arrester 4. And because the surge arrester digital leakage current meter The 315 is based on surge arrester live-line testing technology and can be tested under normal surge arrester operation without power interruption. Therefore, it avoids the power outage caused by the power interruption required by traditional testing methods, and eliminates the need to arrange power outage plans and organize personnel to operate, simplifying the testing process, reducing maintenance and time costs. At the same time, it can be easily integrated with other power equipment monitoring systems to achieve comprehensive monitoring. By reversing the second cylindrical gear 304, the sliding rod 308 is disengaged from the small slot 311. Subsequently, the small slot 311 and the connecting frame 312 are pulled back to their original positions by the tension of the small spring 313, which facilitates the next test.

[0065] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightning arrester leakage current detection device characterized by comprising: include: Leakage current detector housing (1), cleaning part (2), starting part (3) and lightning protection instrument (4); The cleaning part (2) and the starting part (3) are both fixedly installed on the ground. The cleaning part (2) and the starting part (3) are fixedly connected. The cleaning part (2) and the starting part (3) are fitted onto the outside of the lightning protection instrument (4). The cleaning part (2) also includes: a water tank (203), an arc-shaped external frame (205), a rectangular spray head (206), a connecting rod bracket (207), a limiting round rod (208), a strip support rod (209), an arc-shaped plate (210), a dryer (211), a collection box (212), a semi-circular sponge block (213), and a small notch (214); Each of the arc-shaped external frames (205) has an internal cavity, and an arc-shaped plate (210) is fixedly installed on the front end face of each arc-shaped external frame (205); there are four rectangular water nozzles (206), which are divided into two groups, with two rectangular water nozzles (206) in each group. The two rectangular water nozzles (206) in each group are symmetrically distributed, and the two rectangular water nozzles (206) in each group are connected to a water tank (203) on the same side through a pipe. There are two water tanks (203), and the two water tanks (203) are fixedly installed on the connecting support frame (301) respectively; there are two connecting rod brackets (207), which are symmetrically distributed, and the long plates on each connecting rod bracket (207) are respectively The vertical long plate of the connecting rod bracket (207) is fixedly connected to the rods at the rear ends of multiple strip rods (209). A limiting round rod (208) is fixedly installed at the upper and lower ends of the vertical long plate of the connecting rod bracket (207). Each limiting round rod (208) is slidably installed in the arc-shaped groove of the central disc (201) at the corresponding position. There are multiple strip rods (209). A semi-circular sponge block (213) is fixedly connected to the front end of each strip rod (209). There are multiple small notches (214). Multiple small notches (214) are respectively set on the arc plate (210). The diameter of each bracket (204) is smaller than the volume of the semi-circular sponge block (213). The starting part (3) further includes: a second cylindrical gear (304), a swing rectangular plate (305), a connecting shaft (306), a swing groove rod (307), a sliding long rod (308), a rectangular long plate (309), and a short spring (316); There are two second cylindrical gears (304), which are rotatably mounted on the connecting support frame (301). The shafts of the two second cylindrical gears (304) are fixedly connected to each other. Each second cylindrical gear (304) meshes with a large gear (202) on the same side. There are two swing rectangular plates (305), which are symmetrically distributed. Each swing rectangular plate (305) is rotatably mounted on the connecting support frame (301). Each swing rectangular plate (305) has a circular hole at its center. Each swing rectangular plate (305) has a short spring (316) fixedly connected to both sides. There are four short springs (316), which are divided into two groups. Each group contains two short springs (316). The two short springs (316) in each group are symmetrically distributed. The other end of the spring (316) is fixedly connected to the connecting support frame (301); there are two connecting shafts (306), each connecting shaft (306) is fixedly connected to a second cylindrical gear (304) on the same side, each connecting shaft (306) passes through the circular hole at the center of a swing rectangular plate (305) on the same side and is fixedly connected to a swing groove rod (307), there are two swing groove rods (307), the two swing groove rods (307) are symmetrically distributed, each swing groove rod (307) is provided with a sliding groove, the sliding groove is slidably connected to a sliding long rod (308) on the same side, each sliding long rod (308) is slidably installed in the groove of a rectangular long plate (309) on the same side, the sliding long rod (308) is intermittently engaged with a small slot (311) on the same side, and the rectangular long plate (309) is fixedly installed on the connecting support frame (301).

2. The device for detecting leakage current of a surge arrester according to claim 1, wherein The cleaning part (2) includes: a central disc (201), a large gear (202), and a cylindrical support (215). There are two central discs (201), and a large gear (202) is fixedly installed on each central disc (201). Each central disc (201) is provided with two arc-shaped sliding grooves, which are symmetrically distributed. A cylindrical support (215) is fixedly installed between the two central discs (201), and the cylindrical support (215) is provided with multiple through grooves.

3. The device for detecting leakage current of a surge arrester according to claim 1, wherein The water tank (203) has a filter inside.

4. The device for detecting leakage current of a surge arrester according to claim 1, wherein The cleaning part (2) further includes: a support (204); The bracket (204) is fixedly connected to the inner side of the two central discs (201), and two arc-shaped external frames (205) are fixedly installed inside the bracket (204).

5. The device for detecting leakage current of a surge arrester according to claim 1, wherein The collection box (212) is fixedly installed at the bottom of the arc-shaped external frame (205).

6. The device for detecting leakage current of a surge arrester according to claim 1, wherein The starting part (3) includes: a connecting support frame (301), a motor (302), and a first cylindrical gear (303); The lower end of the connecting support frame (301) is provided with a circular screw; the motor (302) is installed on the connecting support frame (301) by screws and nuts, and the shaft of the motor (302) is fixedly connected to the first cylindrical gear (303), and the first cylindrical gear (303) meshes with one of the second cylindrical gears (304).

7. The device for detecting leakage current of a surge arrester according to claim 1, wherein The starting part (3) also includes: a connecting plate (310), a small card slot (311), a connecting frame (312), a small spring (313), a battery clamp (314), and a digital leakage current meter for the surge arrester (315). There are two connecting plates (310), which are fixedly connected to the connecting frame (312) respectively. Both connecting plates (310) are slidably installed in the holes on the connecting support frame (301). The two connecting plates (310) are symmetrically distributed. Each connecting plate (310) has a small slot (311). There are two small springs (313). One end of each small spring (313) is fixedly connected to the connecting frame (312), and the other end of each small spring (313) is fixedly connected to the plate on the connecting support frame (301). There are two battery clamps (314). Both battery clamps (314) are in an open state. Both battery clamps (314) are fixedly installed on the connecting frame (312). Each battery clamp (314) is connected to the digital leakage current meter (315) of the surge arrester through wires.

8. The device for detecting leakage current of a surge arrester according to claim 7, wherein The digital leakage current meter (315) of the surge arrester is fixedly installed on the housing (1) of the leakage current detector, and part of the digital leakage current meter (315) of the surge arrester is exposed on the outside of the housing (1) of the leakage current detector.

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