A lightning arrester online monitor

Abstract

The present invention discloses an online monitor for a lightning arrester, comprising a monitor body and an insulator, wherein the insulator comprises an insulating body, a first conductive structure, a resistor valve plate, an outgoing line connecting rod, and an incoming line connecting rod, wherein the resistor valve plate is arranged in the insulating body, one end of the incoming line connecting rod and the outgoing line connecting rod are electrically connected to the incoming line side and the outgoing line side of the resistor valve plate respectively, and the other ends of the incoming line connecting rod and the outgoing line connecting rod are extended outside the insulating body, the first conductive structure is electrically connected to the incoming line side of the resistor valve plate, the monitor body comprises a housing, a second conductive structure, the insulator is detachably connected to the housing via the outgoing line connecting rod, and the first conductive structure and the second conductive structure are correspondingly conductive. The online monitor for the lightning arrester of the present invention arranges the resistor valve plate in a detachable insulator, and when the resistor valve plate is damaged, the insulator can be directly replaced on site, which is convenient and quick and can effectively reduce maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arrester monitoring, and in particular to an online monitor for a lightning arrester. Background Art

[0002] An online lightning arrester monitor (also known as a lightning arrester leakage current and action recorder) is an instrument used in conjunction with zinc oxide lightning arresters in high-voltage AC power systems. It is connected in series with the arrester's grounding circuit. Its operating principle is as follows: when the arrester is activated by a lightning strike, the discharge current flows through a nonlinear resistor valve plate. The voltage drop across this valve plate powers the discharge counting circuit in the monitor, completing the discharge count. Existing online lightning arrester monitors typically place the nonlinear resistor valve plate inside the monitor, ensuring reliable contact with the monitor's metal conductive housing. However, if the lightning discharge current is high or after multiple discharge current surges, the nonlinear resistor valve plate may be damaged, rendering the monitor unable to perform its lightning strike counting function. In this case, replacing the resistor valve plate requires disassembling the monitor housing. However, the monitor has very strict sealing requirements, making disassembly and replacement difficult on-site. Therefore, if the resistor valve plate is damaged, the entire monitor is usually replaced, resulting in significant cost waste.

[0003] In view of this, the inventors of the present application invented an online monitor for lightning arresters. Summary of the Invention

[0004] The object of the present invention is to provide an online monitor for a lightning arrester which has a simple structure, a reasonable design and can realize rapid replacement of an insulator of a built-in resistor valve.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an online monitor for a lightning arrester, comprising a monitor body and an insulator, the insulator comprising an insulating body, a first conductive structure, a resistance valve plate, a conductive outgoing line connecting rod and an incoming line connecting rod, the resistance valve plate being arranged in the insulating body, the resistance valve plate comprising an incoming line side and an outgoing line side, one end of the incoming line connecting rod and the outgoing line connecting rod being electrically connected to the incoming line side and the outgoing line side of the resistance valve plate respectively, and the other ends of the incoming line connecting rod and the outgoing line connecting rod both extending out of the insulating body, the first conductive structure being electrically connected to the incoming line side of the resistance valve plate, the monitor body comprising a conductive shell, a second conductive structure connected to a discharge counting circuit in the monitor body, the insulator being detachably connected to the shell through the outgoing line connecting rod, and the outgoing line connecting rod being fixedly connected to the shell, the first conductive structure being correspondingly conductive.

[0006] Furthermore, the first conductive structure includes a first conductive ring located outside the insulating body, and the first conductive ring is electrically connected to the incoming line side of the resistance valve plate through a conductor, and the second conductive structure includes a second conductive ring provided on the surface of the shell and corresponding to the first conductive ring.

[0007] Furthermore, the second conductive ring is provided with a plurality of raised contact springs along its circumference.

[0008] Furthermore, the contact springs are all in an inverted V shape.

[0009] Furthermore, the input side and output side of the resistance valve plate are respectively provided with a first electrode and a second electrode, the input connecting rod and the output connecting rod are respectively electrically connected to the resistance valve plate through the first electrode and the second electrode, and the first conductive structure is electrically connected to the first electrode.

[0010] Furthermore, the insulating body includes a mounting end, the end of the outlet connecting rod extends out of the insulating body at the mounting end of the insulating body, the shell is provided with a protrusion that matches the mounting end, and a sealing ring is provided between the mounting end and the protrusion.

[0011] Furthermore, the raised portion is provided with a mounting ring groove, the mounting end is provided with a mounting protruding ring corresponding to the mounting ring groove, the mounting ring groove is located inside the sealing ring, and the second conductive structure is located inside the mounting ring groove.

[0012] Furthermore, the incoming connecting rod and the outgoing connecting rod are both screws, the housing is provided with a threaded hole, and the outgoing connecting rod is threadedly connected to the threaded hole.

[0013] Furthermore, the insulating body is formed by injection molding of epoxy resin, and is integrally injection molded by placing the first conductive structure, the resistance valve plate, the outgoing connecting rod and the incoming connecting rod into an injection mold.

[0014] After adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] The arrester online monitor of the present invention arranges the resistor valve plate in the insulator, and the insulator is designed as an integrated structure that is easy to disassemble and assemble. When a lightning discharge occurs and causes the resistor valve plate to be damaged, the function of the arrester online monitor can be restored by directly replacing a new insulator. This is convenient and quick, and the monitor can be replaced on-site, effectively reducing maintenance costs. At the same time, the monitor can also be quickly restored to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an online monitor for a lightning arrester according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the main body of a monitor according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the insulator installation end according to an embodiment of the present invention;

[0019] Figure 4 Schematic cross-sectional view of an insulator according to an embodiment of the present invention.

[0020] Description of reference numerals:

[0021] 10-Monitor body,

[0022] 11-shell, 111-threaded hole,

[0023] 12-second conductive structure, 121-second conductive ring, 122-contact spring,

[0024] 13-protrusion, 131-mounting ring groove,

[0025] 14-Sealing ring,

[0026] 20-Insulator,

[0027] 21-insulating body, 211-mounting convex ring,

[0028] 22-first conductive structure, 221-first conductive ring, 222-conductor,

[0029] 23-resistance valve plate, 231-first electrode, 232-second electrode,

[0030] 24-outlet connecting rod,

[0031] 25-Inlet connecting rod. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are all based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Example

[0035] Cooperate Figures 1 to 4As shown, the present invention discloses an online monitor for a lightning arrester, comprising a monitor body 10 and an insulator 20, wherein the insulator 20 comprises an insulating body 21, a first conductive structure 22, a resistance valve plate 23, a conductive outgoing line connecting rod 24 and an incoming line connecting rod 25, wherein the resistance valve plate 23 is arranged in the insulating body 21, and the resistance valve plate 23 comprises an incoming line side and an outgoing line side, wherein one end of the incoming line connecting rod 25 and the outgoing line connecting rod 24 are electrically connected to the incoming line side and the outgoing line side of the resistance valve plate 23 respectively, and the incoming line connecting rod 25 The other end of the outlet connecting rod 24 extends out of the insulating body 21, the first conductive structure 22 is electrically connected to the incoming line side of the resistance valve plate 23, the monitor body 10 includes a conductive shell 11, and a second conductive structure 12 connected to the discharge counting circuit in the monitor body 10. The insulator 20 is detachably connected to the shell 11 through the outlet connecting rod 24, and when the outlet connecting rod 24 is connected and fixed to the shell 11, the first conductive structure 22 and the second conductive structure 12 are correspondingly conductive.

[0036] The housing 11 of the monitor body 10 includes a circuit board, on which the discharge counting circuit is located. The housing 11 is a metal housing 11, and a display screen is provided on the housing 11. The end of the incoming connecting rod 25 extending from the insulating body 21 is connected to the arrester, and the end of the outgoing connecting rod 24 extending from the insulating body 21 is used for detachable connection with the housing 11. Since both the outgoing connecting rod 24 and the housing 11 are conductive, and the housing 11 is grounded, the outgoing connecting rod 24 is detachably connected to the housing 11 while also being grounded through its connection with the housing 11. Specifically, the incoming connecting rod 25 and the outgoing connecting rod 24 are both screws, and the housing 11 is provided with a threaded hole 111, and the outgoing connecting rod 24 is threadedly connected to the threaded hole 111. The threaded connection facilitates replacement, allowing for quick replacement of the insulator 20 and the housing 11. Furthermore, a plurality of metal springs (not shown in the figure) are designed along the threaded hole 111 on the inner wall of the shell 11. When the outlet connecting rod 24 is not installed in the threaded hole 111, the metal springs close the threaded hole 111. When the outlet connecting rod 24 is installed with the threaded hole 111, the end of the outlet connecting rod 24 pushes the metal spring toward the inside of the shell 11. After the outlet connecting rod 24 is unscrewed, the metal springs are reset under their own elastic action and close the threaded hole 111, thereby preventing external air from entering the interior of the shell 11 when replacing the insulator 20.

[0037] The insulator 20 is an integrated design, manufactured and sold separately, making it easy to replace and maintain. The integrated design also facilitates quick replacement of the insulator 20. Specifically, the insulating body 21 is injection-molded from epoxy resin. The first conductive structure 22, the resistor valve plate 23, the outgoing connecting rod 24, and the incoming connecting rod 25 are placed into an injection mold and then integrally molded. Injection molding facilitates mass production of the insulator 20, and there are no gaps between the insulating body 21 and other components, effectively ensuring a tight seal.

[0038] The insulator 20 is designed to be detachably connected to the housing 11. In this way, when the resistance valve plate 23 in the insulator 20 is damaged, only the insulator 20 needs to be replaced without replacing the entire monitor. At the same time, it can be directly replaced on site, which effectively reduces costs and the monitor can be quickly put into use again.

[0039] The first electrode 231 and the second electrode 232 are provided on the input and output sides of the resistance valve plate 23, respectively. The input connecting rod 25 and the output connecting rod 24 are electrically connected to the resistance valve plate 23 via the first electrode 231 and the second electrode 232, respectively. The first conductive structure 22 is electrically connected to the first electrode 231. The first electrode 231 and the second electrode 232 are both electrode plates.

[0040] Cooperate Figures 2 to 4 As shown, the first conductive structure 22 includes a first conductive ring 221 located outside the insulating body 21, and the first conductive ring 221 is electrically connected to the incoming line side of the resistance valve plate 23 via a conductor 222. The second conductive structure 12 includes a second conductive ring 121 provided on the surface of the housing 11 and arranged corresponding to the first conductive ring 221. Specifically, the first electrode 231, the first conductive ring 221, and the conductor 222 are integrally formed. When the outgoing connecting rod 24 is fixedly connected to the housing 11, the first conductive ring 221 and the second conductive ring 121 are in contact and conductive, thereby connecting the resistance valve plate 23 to the discharge counting circuit.

[0041] Specifically, the second conductive ring 121 is provided with a plurality of raised contact springs 122 along its circumference, each of which is in an inverted V-shape. The provision of the contact springs 122 ensures reliable conduction between the first conductive ring 221 and the second conductive ring 121 when the outgoing connecting rod 24 is connected and fixed to the housing 11, thereby ensuring the performance of the monitor.

[0042] The insulating body 21 includes a mounting end, and the end of the outlet connecting rod 24 extends out of the insulating body 21 at the mounting end of the insulating body 21. The housing 11 is provided with a protrusion 13 that matches the mounting end, and a sealing ring 14 is provided between the mounting end and the protrusion 13.

[0043] The raised portion 13 is provided with a mounting ring groove 131 , and the mounting end is provided with a mounting protruding ring 211 corresponding to the mounting ring groove 131 . The mounting ring groove 131 is located inside the sealing ring 14 , and the second conductive structure 12 is located inside the mounting ring groove 131 .

[0044] Specifically, the raised portion 13 is cylindrical, and its top surface is provided with an annular sealing groove. The sealing ring 14 is embedded in the sealing groove, and the sealing ring 14 protrudes from the notch of the sealing groove, so as to ensure the sealing between the mounting end of the insulating body 21 and the raised portion 13. The inner side of the sealing groove is provided with the mounting ring groove 131. When installing the insulator 20, the mounting protruding ring 211 of the mounting end of the insulating body 21 is installed corresponding to the mounting ring groove 131, so that the insulator 20 can be quickly positioned. The inner side of the mounting ring groove 131 is provided with a circular groove, and the second conductive ring 121 is embedded in the circular groove, and a positioning column is provided in the circular groove. The second conductive ring 121 is provided with a positioning hole that matches the positioning column, thereby facilitating installation and fixation. Among them, the threaded hole 111 for installing and fixing the output connecting rod 24 passes through the raised portion 13.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A lightning arrester online monitor, characterized by: The monitor comprises a main body and an insulator, wherein the insulator comprises an insulating body, a first conductive structure, a resistance valve plate, a conductive outgoing connecting rod and an incoming connecting rod, wherein the resistance valve plate is arranged in the insulating body, the resistance valve plate comprises an incoming side and an outgoing side, one end of the incoming connecting rod and the outgoing connecting rod are electrically connected to the incoming side and the outgoing side of the resistance valve plate respectively, and the other ends of the incoming connecting rod and the outgoing connecting rod both extend outside the insulating body, the first conductive structure is electrically connected to the incoming side of the resistance valve plate, the monitor main body comprises a conductive shell, a second conductive structure connected to a discharge counting circuit in the monitor main body, the insulator is detachably connected to the shell via the outgoing connecting rod, and the outgoing connecting rod is fixedly connected to the shell, and the first conductive structure and the second conductive structure are correspondingly conductive; The outlet connecting rod is a screw rod, and the shell is provided with a threaded hole. The outlet connecting rod is threadedly connected to the threaded hole. A plurality of metal springs are designed on the inner wall of the shell along the threaded hole. When the outlet connecting rod is not installed in the threaded hole, the metal springs close the threaded hole; when the outlet connecting rod is installed in the threaded hole, the end of the outlet connecting rod pushes the metal spring toward the inside of the shell. When the outlet connecting rod is screwed out of the threaded hole, the metal springs are reset under their own elastic action to close the threaded hole.

2. The arrester online monitor according to claim 1, characterized in that: The first conductive structure includes a first conductive ring located outside the insulating body, and the first conductive ring is electrically connected to the incoming line side of the resistance valve plate through a conductor. The second conductive structure includes a second conductive ring provided on the surface of the shell and corresponding to the first conductive ring.

3. The arrester online monitor according to claim 2, characterized in that: The second conductive ring is provided with a plurality of raised contact springs along its circumference.

4. The arrester online monitor according to claim 3, characterized in that: The contact springs are all in an inverted V shape.

5. The arrester online monitor according to any one of claims 1 to 4, characterized in that: The input side and output side of the resistance valve plate are respectively provided with a first electrode and a second electrode. The input connecting rod and the output connecting rod are respectively electrically connected to the resistance valve plate through the first electrode and the second electrode, and the first conductive structure is electrically connected to the first electrode.

6. The arrester online monitor according to claim 1, characterized in that: The insulating body includes a mounting end, the end of the outlet connecting rod extends out of the insulating body at the mounting end of the insulating body, the shell is provided with a protrusion matched with the mounting end, and a sealing ring is provided between the mounting end and the protrusion.

7. The arrester online monitor according to claim 6, characterized in that: The raised portion is provided with a mounting ring groove, the mounting end is provided with a mounting convex ring corresponding to the mounting ring groove, the mounting ring groove is located inside the sealing ring, and the second conductive structure is located inside the mounting ring groove.

8. The arrester online monitor according to claim 1, characterized in that: The line-in connecting rod is a screw rod.

9. The arrester online monitor according to claim 1, characterized in that: The insulating body is formed by injection molding of epoxy resin, and is integrally injection molded by placing the first conductive structure, the resistance valve plate, the outgoing connecting rod and the incoming connecting rod into an injection mold.

Images