Surge arrester with opening function
By designing a threaded rod and a limiting plate, and combining upper and lower sensors, the problems of unstable connection of the surge arrester's breaking guide rod and decreased monitoring accuracy were solved, thus achieving stable breaking and accurate monitoring of the surge arrester.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHUANGAN ELECTRIC POWER TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-26
AI Technical Summary
The connection between the breaking conductor rod and the conductive core of the existing surge arrester is unstable, the sensor monitoring accuracy is reduced, and it is easily affected by external objects.
The design incorporates a threaded rod, a break guide rod, a limit plate, a sealing rubber ring, and a rotating rod, along with a monitoring system using upper and lower sensors, to ensure stable lifting and lowering of the break guide rod and accurate monitoring.
It improves the stability and monitoring accuracy of the surge arrester's breaking function, avoids problems such as the decrease of spring elastic potential energy and sensor blockage, and extends its service life.
Smart Images
Figure CN224417576U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of surge arrester technology, specifically to a surge arrester with a breaking function. Background Technology
[0002] Gas-insulated metal-enclosed switchgear (GIS) is a metal-enclosed switchgear and control equipment in which at least part of it uses a gas at a pressure higher than atmospheric pressure as the insulating medium. GIS consists of circuit breakers, disconnecting switches, grounding switches, instrument transformers, surge arresters, busbars, connectors, and outgoing terminals. All these devices or components are enclosed in a grounded metal casing filled with SF6 insulating gas at a certain pressure; hence, it is also called SF6 fully enclosed combined electrical equipment. When testing or maintaining a GIS, if the voltage applied to the GIS exceeds the voltage that the surge arrester can withstand, the surge arrester must be removed before testing or maintenance. Before removal, the insulating gas in the surge arrester and its adjacent GIS gas chambers must be recovered. After testing or maintenance, the surge arrester is reinstalled, and the surge arrester and its adjacent GIS gas chambers are evacuated and filled with insulating gas. Finally, the surge arrester and its adjacent GIS gas chambers must be sealed and leak-tested.
[0003] Chinese patent document CN222867349U discloses a surge arrester with a breaking function, including a surge arrester housing and a base plate. The surge arrester housing is fixedly installed on the top outer wall of the base plate. A surge arrester conductive core is installed inside the surge arrester housing, and a breaking guide rod is provided inside the surge arrester housing. The top end of the breaking guide rod is electrically connected to the bottom end of the surge arrester conductive core. An insulating sealing plate is fixedly provided at the bottom end of the breaking guide rod. A limiting groove is formed in the middle of the bottom outer wall of the base plate, and the insulating sealing plate is slidably disposed on the inner wall of the limiting groove. This invention allows the insulating sealing plate to be pulled down, causing the breaking guide rod to move downwards. The breaking guide rod continues to move downwards within the movable hole until it is completely moved to the outside of the surge arrester housing, thus achieving the breaking of the surge arrester conductive core from the breaking guide rod. This is convenient to operate and can prevent the surge arrester from being subjected to overvoltage, making it practical and suitable for widespread promotion and use. The following problems exist with the existing technology:
[0004] While the aforementioned literature describes a quick disconnection between the top of the breaking conductor rod and the bottom of the surge arrester's conductive core, this method primarily relies on the pressing of a wedge-shaped locking block for both disconnection and installation. The wedge-shaped locking block's reset depends mainly on a compression spring. If the compression spring is used for an extended period, its elastic potential energy decreases, making reset difficult and resulting in an unstable connection between the breaking conductor rod and the surge arrester's conductive core. Furthermore, the aforementioned literature relies on sensors for monitoring the breaking conductor rod's reset and disconnection. However, these sensors are installed at the bottom of the base plate, far from the insulating sealing plate, making the central area susceptible to interference from external objects, thus reducing the sensor's monitoring accuracy. Utility Model Content
[0005] This invention provides a surge arrester with a breaking function to solve the problems mentioned in the background art.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] A surge arrester with a breaking function includes a surge arrester housing, a base plate fixedly installed at the bottom of the surge arrester housing, a basin-type insulator fixedly installed at the top of the surge arrester housing, an explosion-proof device fixedly installed on the left side of the surge arrester housing, an insulating support housing fixedly installed at the bottom of the inner wall of the surge arrester housing, a shield fixedly installed at the top of the insulating support housing, an insertion hole opened at the bottom center of the shield, a fixed protective box fixedly installed at the bottom center of the base plate, a threaded hole opened at the bottom of the base plate, the threaded hole being located at the top of the inner cavity of the fixed protective box, a threaded rod threaded into the inner ring of the threaded hole, a breaking guide rod fixedly installed at the top of the threaded rod, the top end of the breaking guide rod penetrating into the inner cavity of the insulating support housing and engaging with the insertion hole, a limiting plate fixedly installed at the bottom of the threaded rod, a rotating rod fixedly installed at the bottom of the limiting plate, the bottom end of the rotating rod penetrating into the bottom of the fixed protective box, and extension rotating plates fixedly installed on both the left and right sides.
[0008] A further improvement of this utility model is that: a surge arrester conductive core is fixedly installed on the top of the shield, and a conductive rod is fixedly installed on the top of the surge arrester conductive core.
[0009] A further improvement of this utility model is that the diameter of the limiting disc is larger than the inner diameter of the threaded hole, and a sealing rubber ring is fixedly bonded to the top of the limiting disc.
[0010] A further improvement of this utility model is that: a conductor is provided inside the basin-type insulator, the top end of the conductive rod is electrically connected to the conductor inside the basin-type insulator, and the conductor inside the basin-type insulator is electrically connected to an external circuit.
[0011] A further improvement of this utility model is that: a monitoring box is fixedly installed on the left side of the fixed protective box, the inner cavity of the monitoring box is interconnected with the inner cavity of the fixed protective box, an upper sensor is fixedly installed on the upper left side of the inner wall of the monitoring box, a lower sensor is fixedly installed on the lower left side of the inner wall of the monitoring box, and the signal output terminals of the upper and lower sensors are electrically connected to data transmission wires, and the other ends of the two data transmission wires pass through to the left side of the monitoring box and are communicatively connected to the signal input terminal of the monitoring system.
[0012] A further improvement of this utility model is that: when the breaking guide rod is engaged with the socket, the limiting disk is located to the right of the upper sensor; when the breaking guide rod is separated from the socket, the limiting disk is located to the right of the lower sensor.
[0013] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0014] 1. This utility model provides a surge arrester with a breaking function. Through the cooperation between the threaded rod, the breaking guide rod, the limiting plate, the sealing rubber ring, the rotating rod, and the extension plate, the breaking guide rod, which ensures the breaking function of the surge arrester, can maintain a stable lifting and lowering breaking, without worrying about the decrease of the elastic potential energy of the spring, thus improving the service life.
[0015] 2. This utility model provides a surge arrester with a breaking function. Through the cooperation between the fixed protective box, the monitoring box, the upper sensor, the lower sensor, and the limiting plate, the upper and lower sensors used to monitor the breaking state can monitor the state of the limiting plate inside the fixed protective box within the monitoring box. This effectively protects the sensors, prevents obstruction by foreign objects, and improves the monitoring accuracy of the surge arrester's breaking state. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic cross-sectional view of the surge arrester housing of the present invention.
[0018] Figure 3 This is a cross-sectional schematic diagram of the base plate and the fixed protective box of this utility model structure;
[0019] Figure 4 This is a schematic diagram of the limiting plate structure of this utility model;
[0020] Figure 5 This is a cross-sectional schematic diagram of the monitoring box of this utility model.
[0021] In the diagram: 1. Surge arrester housing; 11. Surge arrester conductive core; 12. Conductive rod; 13. Shielding body; 131. Socket; 14. Insulating support housing; 2. Base plate; 21. Threaded hole; 22. Fixed protective box; 221. Monitoring box; 2211. Upper sensor; 2212. Lower sensor; 2213. Data transmission wire; 23. Threaded rod; 231. Disconnecting guide rod; 232. Limiting plate; 2321. Sealing rubber ring; 233. Rotating rod; 234. Extension rotating plate; 3. Basin insulator; 4. Explosion-proof device. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand
[0023] Understood. The present invention will now be further described in conjunction with specific implementation methods.
[0024] like Figure 1 , Figure 2 As shown, this utility model provides a surge arrester with a breaking function, including a surge arrester housing 1, a base plate 2 fixedly installed at the bottom of the surge arrester housing 1, a basin-type insulator 3 fixedly installed at the top of the surge arrester housing 1, an explosion-proof device 4 fixedly installed on the left side of the surge arrester housing 1, an insulating support housing 14 fixedly installed at the bottom of the inner wall of the surge arrester housing 1, a shield 13 fixedly installed at the top of the insulating support housing 14, a surge arrester conductive core 11 fixedly installed at the top of the shield 13, a conductive rod 12 fixedly installed at the top of the surge arrester conductive core 11, a conductor inside the basin-type insulator 3, the top of the conductive rod 12 being electrically connected to the conductor inside the basin-type insulator 3, and the conductor inside the basin-type insulator 3 being electrically connected to the external circuit.
[0025] The insulating support shell 14 provides a preset insulation distance between the shield 13 and the base plate 2, preventing the leakage current of the surge arrester from being conducted to the ground through the base plate 2. In addition, the surge arrester has sufficient insulation when an overvoltage higher than the surge arrester can withstand is applied across its terminals.
[0026] like Figure 3 , Figure 4 As shown, a socket 131 is provided at the bottom center of the shield 13, and a fixed protective box 22 is fixedly installed at the bottom center of the base plate 2. A threaded hole 21 is provided at the bottom of the base plate 2. The threaded hole 21 is located at the top of the inner cavity of the fixed protective box 22. A threaded rod 23 is installed in the inner ring of the threaded hole 21. A breaking guide rod 231 is fixedly installed at the top of the threaded rod 23. The top end of the breaking guide rod 231 penetrates into the inner cavity of the insulating support shell 14 and engages with the socket 131. A limiting plate 232 is fixedly installed at the bottom of the threaded rod 23. A rotating rod 233 is fixedly installed at the bottom of the limiting plate 232. The bottom end of the rotating rod 233 penetrates into the bottom of the fixed protective box 22, and extension rotating plates 234 are fixedly installed on both the left and right sides. The diameter of the limiting plate 232 is larger than the inner ring diameter of the threaded hole 21. A sealing rubber ring 2321 is fixedly bonded to the top of the limiting plate 232.
[0027] When it is necessary to disconnect the connection between the breaking guide rod 231 and the bottom socket 131 of the shield 13, simply rotate the rotating rod 233 using the extension rotating plate 234 at the bottom of the fixed protective box 22. This will drive the limit plate 232 and the threaded rod 23 to rotate. Combined with the threaded connection between the threaded rod 23 and the threaded hole 21, the breaking guide rod 231 can be controlled to move downwards until it is completely disengaged from the socket 131. This achieves the disconnection of the surge arrester's conductive core 11 from the breaking guide rod 231. The operation is convenient and can prevent the surge arrester from being subjected to overvoltage. However, further steps are required... When reconnecting, simply reverse the extension plate 234. The rotating rod 233 will drive the limiting plate 232 and the threaded rod 23 to reverse. This will cause the threaded rod 23 to drive the breaking guide rod 231 to gradually move upward in the inner cavity of the insulating support shell 14 until the top of the limiting plate 232 abuts against the bottom of the base plate 2. At this time, the breaking guide rod 231 can be inserted into the insertion hole 131. The sealing rubber ring 2321 can improve the sealing of the limiting plate 232. At the same time, the self-locking property of the threaded connection between the threaded rod 23 and the threaded hole 21 will prevent the threaded rod 23 from falling down at will.
[0028] like Figure 5 As shown, a monitoring box 221 is fixedly installed on the left side of the fixed protective box 22. The inner cavity of the monitoring box 221 is interconnected with the inner cavity of the fixed protective box 22. An upper sensor 2211 is fixedly installed on the upper left side of the inner wall of the monitoring box 221, and a lower sensor 2212 is fixedly installed on the lower left side of the inner wall of the monitoring box 221. The signal output terminals of the upper sensor 2211 and the lower sensor 2212 are electrically connected to data transmission wires 2213. The other ends of the two data transmission wires 2213 pass through to the left side of the monitoring box 221 and are connected to the signal input terminal of the monitoring system. When the disconnecting guide rod 231 is engaged with the socket 131, the limiting disk 232 is located to the right of the upper sensor 2211. When the disconnecting guide rod 231 is separated from the socket 131, the limiting disk 232 is located to the right of the lower sensor 2212.
[0029] When the disconnecting guide rod 231 is inserted into the insertion hole 131 at the bottom of the shield 13, the limiting plate 232 will be detected by the upper sensor 2211 inside the monitoring box 221, and a signal will be sent to the monitoring system via the data transmission wire 2213. The monitoring system will output a connection information. When the disconnecting guide rod 231 is completely separated from the insertion hole 131 at the bottom of the shield 13, the limiting plate 232 will be detected by the lower sensor 2212, and a signal will be sent to the monitoring system via the data transmission wire 2213. The monitoring system will output a disconnect information. Since the fixed protective box 22 and the monitoring box 221 are in a mutually connected relationship, there is no need to worry about the upper sensor 2211 and the lower sensor 2212 being blocked by foreign objects from the limiting plate 232, which can ensure the accuracy of each monitoring.
[0030] The working principle of this surge arrester with breaking function will be explained in detail below.
[0031] like Figure 1-5 As shown, when it is necessary to disconnect the connection between the breaking guide rod 231 and the bottom socket 131 of the shield 13, simply rotate the rotating rod 233 using the extension rotating plate 234 at the bottom of the fixed protective box 22. This will drive the limiting plate 232 and the threaded rod 23 to rotate. With the threaded connection between the threaded rod 23 and the threaded hole 21, the breaking guide rod 231 can be controlled to move downwards until it is completely disengaged from the socket 131. This will disconnect the surge arrester conductive core 11 from the breaking guide rod 231. The operation is convenient and can prevent the surge arrester from being subjected to overvoltage. When reconnection is required, simply reverse the extension rotating plate 234. The rotating rod 233 will drive the limiting plate 232 and the threaded rod 23 to reverse. This will cause the threaded rod 23 to drive the breaking guide rod 231 to gradually move upwards in the inner cavity of the insulating support shell 14 until the top of the limiting plate 232 abuts against the bottom of the base plate 2. At this time, the breaking guide rod 231 can be inserted into the socket 131 and the sealing rubber will be used to... The ring 2321 improves the sealing of the limiting plate 232. Simultaneously, the self-locking nature of the threaded connection between the threaded rod 23 and the threaded hole 21 prevents the threaded rod 23 from descending arbitrarily. When the disconnecting guide rod 231 is inserted into the insertion hole 131 at the bottom of the shield 13, the limiting plate 232 is detected by the upper sensor 2211 inside the monitoring box 221 and sends a signal to the monitoring system via the data transmission wire 2213. The monitoring system outputs an on / off signal. When the disconnecting guide rod 231 is completely separated from the insertion hole 131 at the bottom of the shield 13, the limiting plate 232 is detected by the lower sensor 2212 and sends a signal to the monitoring system via the data transmission wire 2213. The monitoring system outputs a off / off signal. Since the fixed protective box 22 and the monitoring box 221 are in a mutually connected relationship, there is no need to worry about foreign objects obstructing the connection between the upper sensor 2211, the lower sensor 2212, and the limiting plate 232, ensuring the accuracy of each monitoring operation.
[0032] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A surge arrester with breaking function, comprising a surge arrester housing (1), characterized in that: A base plate (2) is fixedly installed at the bottom of the surge arrester housing (1). A basin-type insulator (3) is fixedly installed at the top of the surge arrester housing (1). An explosion-proof device (4) is fixedly installed on the left side of the surge arrester housing (1). An insulating support housing (14) is fixedly installed at the bottom of the inner wall of the surge arrester housing (1). A shield (13) is fixedly installed at the top of the insulating support housing (14). A socket (131) is opened at the bottom center of the shield (13). A fixed protective box (22) is fixedly installed at the bottom center of the base plate (2). A threaded hole (21) is opened at the bottom of the base plate (2). (21) Located at the top of the inner cavity of the fixed protective box (22), the inner ring of the threaded hole (21) is threaded with a threaded rod (23), the top of the threaded rod (23) is fixedly installed with a break guide rod (231), the top end of the break guide rod (231) penetrates into the inner cavity of the insulating support shell (14) and is engaged with the insertion hole (131), the bottom of the threaded rod (23) is fixedly installed with a limit plate (232), the bottom of the limit plate (232) is fixedly installed with a rotating rod (233), the bottom end of the rotating rod (233) penetrates into the bottom of the fixed protective box (22) and extension rotating plates (234) are fixedly installed on both the left and right sides.
2. A surge arrester with breaking function according to claim 1, characterized in that: A surge arrester conductive core (11) is fixedly installed on the top of the shield (13), and a conductive rod (12) is fixedly installed on the top of the surge arrester conductive core (11).
3. A surge arrester with breaking function according to claim 1, characterized in that: The diameter of the limiting plate (232) is larger than the inner diameter of the threaded hole (21), and a sealing rubber ring (2321) is fixedly bonded to the top of the limiting plate (232).
4. A surge arrester with breaking function according to claim 2, characterized in that: The basin-type insulator (3) is equipped with a conductor inside, and the top of the conductive rod (12) is electrically connected to the conductor inside the basin-type insulator (3). The conductor inside the basin-type insulator (3) is electrically connected to the external circuit.
5. A surge arrester with breaking function according to claim 1, characterized in that: A monitoring box (221) is fixedly installed on the left side of the fixed protective box (22). The inner cavity of the monitoring box (221) is interconnected with the inner cavity of the fixed protective box (22). An upper sensor (2211) is fixedly installed on the upper left side of the inner wall of the monitoring box (221), and a lower sensor (2212) is fixedly installed on the lower left side of the inner wall of the monitoring box (221). The signal output terminals of the upper sensor (2211) and the lower sensor (2212) are electrically connected to data transmission wires (2213). The other ends of the two data transmission wires (2213) pass through the left side of the monitoring box (221) and are communicatively connected to the signal input terminal of the monitoring system.
6. A surge arrester with breaking function according to claim 5, characterized in that: When the disconnecting guide rod (231) is engaged with the socket (131), the limiting disk (232) is located to the right of the upper sensor (2211). When the disconnecting guide rod (231) is separated from the socket (131), the limiting disk (232) is located to the right of the lower sensor (2212).