A lightning arrester insulating base and a lightning arrester

Abstract

The application discloses a lightning arrester insulating base and a lightning arrester, and belongs to the technical field of lightning arrester installation. The lightning arrester insulating base comprises an insulating mounting base, an angle adjusting part arranged at one end of the insulating mounting base, a rotating disc rotatably connected with the insulating mounting base, a clamping plate two adjustably arranged on the outer side of the rotating disc, a clamping plate one arranged on one side of the clamping plate two, a fixing bolt arranged between the clamping plate one and the clamping plate two, and an anti-loosening part arranged on the outer side of the clamping plate two and used for preventing the fixing bolt from loosening. First-stage adjustment is achieved by cooperation of a rotating shaft, a limiting disc two and a limiting bolt two, so that the rotating disc can be horizontally rotated around the axis of the rotating disc, and horizontal angle compensation of the installation direction of the lightning arrester is realized. Second-stage adjustment is achieved by cooperation of a limiting disc one and a limiting bolt one in the middle of the rotating disc, so that the clamping plate two can be swung around the rotating shaft, and the elevation angle of the lightning arrester can be adjusted. The two-stage adjustment is independent and does not interfere with each other, and can meet the differentiated needs of different installation sites for the installation angle of the lightning arrester.

Description

Technical Field

[0001] This invention relates to the field of surge arrester technology, specifically to a surge arrester insulating base and a surge arrester. Background Technology

[0002] Surge arresters, as indispensable overvoltage protection devices in power systems, have the core function of rapidly diverting current to ground when overvoltage occurs, thereby protecting the insulation safety of critical equipment such as transformers and switches. Surge arresters are typically fixedly installed on supporting structures such as towers, frames, or angle steel using insulating bases. The quality of this installation directly affects whether the surge arrester can operate accurately and reliably discharge current when overvoltage occurs. However, existing surge arrester insulating bases often have fixed angles or insufficient adjustment capabilities during installation. Most existing surge arrester insulating bases are fixed structures, and the angle cannot be changed after installation. However, in actual engineering projects, factors such as tower tilt, foundation settlement, and line routing deviations often cause a deviation between the ideal installation direction of the surge arrester and the fixed direction of the base, resulting in the surge arrester not being in its optimal protective posture and significantly reducing its protective effect. Furthermore, surge arrester bases are generally fixed to the mounting surface using bolt clamping. During long-term outdoor operation, surge arresters are continuously subjected to various dynamic loads such as wind vibration, alternating temperature differences, and impacts from ice shedding. The fixing bolts are very prone to loosening or even falling off under alternating stress. This can lead to the surge arrester tilting and deviating of its protection characteristics, or even cause the surge arrester to fall, resulting in serious safety accidents. Summary of the Invention

[0003] The purpose of this invention is to provide an insulating base for a surge arrester and a surge arrester to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a surge arrester insulating base, comprising: Insulating mounting base; An angle adjustment part is placed at one end of the insulating mounting base. The angle adjustment part includes a rotating disk rotatably connected to the insulating mounting base. A second clamping plate is tunably installed on the outer side of the rotating disk. A first clamping plate is provided on one side of the second clamping plate. A fixing bolt is installed between the first clamping plate and the second clamping plate. An anti-loosening part is installed on the outer side of the second clamping plate to prevent the fixing bolt from loosening.

[0005] Preferably, the angle adjustment part further includes a rotating shaft rotatably mounted at one end of the insulating mounting base, the rotating shaft passing through the insulating mounting base and fixedly connected to a limiting disk.

[0006] Preferably, the outer wall of the rotating disk is fixed to the top of the limiting disk II, and multiple limiting grooves are equidistantly provided on the outer side of the limiting disk II. The bottom of the insulating mounting base is threaded with a limiting bolt II for cooperating with the limiting groove.

[0007] Preferably, the middle part of the rotating disk is rotatably connected to the end of the clamping plate two, and a limiting disk one with multiple limiting grooves is fixedly connected to the middle part of the rotating disk. A limiting bolt one is bolted on one side of the clamping plate two for cooperating with the limiting groove to limit the rotation disk.

[0008] Preferably, both clamping plates one and two have rounded rectangular holes in their middle sections. A reinforcing bolt is threaded into the middle section of clamping plate one. One end of the fixing bolt passes through the rounded rectangular hole and is threaded with a fastening nut. Two constraint plates are fixed to the outside of clamping plate one and outside the rounded rectangular hole to restrict the rotation of the fixing bolt.

[0009] Preferably, the anti-detachment part includes a one-way bearing, and a limiting sleeve that cooperates with a fastening nut is fixedly connected inside the one-way bearing, and a limiting piece is fixedly connected to the outside of the one-way bearing.

[0010] Preferably, the second clamping plate has a guide groove on its side, and the second clamping plate is slidably connected to a limiting sleeve that cooperates with the guide groove. The limiting sleeve has a groove in its middle that cooperates with a limiting piece.

[0011] A surge arrester includes a surge arrester body, an insulating mounting base, and a thermally explosive disconnector. The surge arrester body is fixedly connected to the top of the insulating mounting base, which is the surge arrester insulating base described above. A high-voltage connection terminal is fixedly connected to the top of the surge arrester body. A core is installed inside the surge arrester body. A thermally explosive disconnector is fixedly connected to the bottom of the surge arrester body through the insulating mounting base. A protective layer is provided on the outside of the core.

[0012] Compared with the prior art, the beneficial effects of this invention are as follows: By setting an angle adjustment section, two levels of independent angle adjustment in the horizontal and vertical directions are achieved; the first level of adjustment, through the cooperation of the rotating shaft, the second limiting plate, and the second limiting bolt, allows the rotating disk to rotate horizontally around its axis, achieving horizontal deflection compensation of the surge arrester's installation direction; the second level of adjustment, through the cooperation of the first limiting plate and the first limiting bolt in the middle of the rotating disk, allows the second clamping plate to swing vertically around the rotating shaft, achieving elevation adjustment of the surge arrester; the two levels of adjustment are independent of each other and do not interfere with each other, which can meet the differentiated requirements of the surge arrester's installation angle at different installation sites, effectively compensate for foundation installation errors, and improve the installation adaptability and engineering performance of the surge arrester. Features include: an anti-loosening mechanism with a mechanical interlocking structure consisting of a one-way bearing, a limiting sleeve, a limiting plate, a limiting slide sleeve, and a guide groove, providing strong anti-loosening protection for the fastening nut; the one-way bearing restricts the fastening nut to rotate only in the tightening direction; the limiting slide sleeve, constrained by the guide groove, can only slide axially, and its groove sidewall forms a rigid engagement with the limiting plate; when external vibration attempts to loosen the fastening nut by reversing, the reverse torque is transmitted to the limiting plate via the one-way bearing, but the rotational tendency of the limiting plate is immediately blocked by the groove sidewall of the limiting slide sleeve, forming a robust mechanical interlock, reducing the possibility of the fastening nut loosening due to vibration, and significantly improving the long-term reliability of the connection, especially suitable for high-voltage transmission lines and other high-vibration environments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention when it is installed with angle iron; Figure 3 This is a schematic diagram of the structure of the surge arrester body of the present invention; Figure 4 This is an enlarged view of point A in the present invention; Figure 5 This is a schematic diagram of the structure of the limiting sleeve of the present invention; Figure 6 This is a schematic diagram of the structure of the clamping plate 2 of the present invention; Figure 7 This is a schematic diagram of the rotating disk of the present invention.

[0014] In the diagram: 1. Clamping plate one; 2. Constraint plate; 3. Reinforcing bolt; 4. Fixing bolt; 5. Clamping plate two; 6. Guide groove; 7. Mounting slot; 8. Rotary disc; 9. Limiting disc one; 10. Limiting bolt one; 11. Rotating shaft; 12. Limiting disc two; 13. Limiting bolt two; 14. Insulating mounting base; 15. Surge arrester body; 16. Thermal release device; 17. Core; 18. High-voltage connection terminal; 19. Protective layer; 20. Limiting sleeve; 21. Fastening nut; 22. Limiting plate; 23. One-way bearing; 24. Limiting sleeve. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-7 The present invention provides a technical solution: a surge arrester insulating base, comprising: an insulating mounting base 14; an angle adjustment part located at one end of the insulating mounting base 14, the angle adjustment part comprising a rotating disk 8 rotatably connected to the insulating mounting base 14, a second clamping plate 5 adjustablely mounted on the outer side of the rotating disk 8, a first clamping plate 1 provided on one side of the second clamping plate 5, a fixing bolt 4 installed between the first clamping plate 1 and the second clamping plate 5, and an anti-loosening part installed on the outer side of the second clamping plate 5 to prevent the fixing bolt 4 from loosening.

[0017] It should be noted that in this embodiment, clamping plate 1 and clamping plate 5 clamp the position to be installed in the middle, and the anti-detachment fixing bolt 4 is used to limit the position and prevent loosening during use. The axis of the rotating disk 8 and the direction of the vertical axis of the rotating disk 8 are adjusted by the angle adjustment part to rotate the insulating mounting base 14, and then it is fixed. In this way, the angle of the surge arrester can be adjusted as needed.

[0018] In one embodiment, the angle adjustment part further includes a rotating shaft 11 rotatably mounted on one end of the insulating mounting base 14. The rotating shaft 11 passes through the insulating mounting base 14 and is fixedly connected to a limiting disk 12. The outer wall of the rotating disk 8 is fixedly connected to the top of the limiting disk 12. Multiple limiting grooves are equidistantly provided on the outer side of the limiting disk 12. The bottom of the insulating mounting base 14 is threadedly connected to a limiting bolt 13 for engaging with the limiting groove. The middle part of the rotating disk 8 is rotatably connected to the end of the clamping plate 5. A limiting disk 9 with multiple limiting grooves is fixedly connected to the middle part of the rotating disk 8. A limiting bolt 10 is bolted on one side of the clamping plate 5 for engaging with the limiting groove to limit the rotation disk 8.

[0019] It should be noted that in this embodiment, the limiting plate 12 is a disc-shaped component with multiple limiting grooves evenly spaced on its outer circumference. The bottom of the insulating mounting base 14 is threadedly connected to the limiting bolt 13. When the limiting bolt 13 is screwed in, its end is embedded in a limiting groove of the limiting plate 12, thereby preventing further rotation of the rotating shaft 11. The outer wall (outer circumferential surface) of the rotating disk 8 is fixedly installed on the top of the limiting plate 12. Therefore, when the rotating shaft 11 is locked by the limiting bolt 13, the entire rotating disk 8 is also locked at the current angular position. In the free state, the limiting bolt 13 can be loosened, allowing the rotating shaft 11, together with the limiting plate 12 and the rotating disk 8, to rotate horizontally around its axis, thereby achieving horizontal deflection compensation of the surge arrester installation direction. The clamping plate 5 has an L-shaped structure, and one end of the clamping plate 5 is rotatably engaged with the central area of ​​the rotating disk 8 through a rotating shaft, allowing the clamping plate 5 to pitch and swing around the rotating shaft. The rotating shaft is fixedly connected to the rotating disk 8. The limiting disc 9 is fixed to the end of the rotating shaft. The limiting disc 9 is a disc-shaped component with multiple limiting grooves on its outer side. The clamping plate 5 is threadedly connected to the corresponding position of the limiting groove with a limiting bolt 10. When the limiting bolt 10 is screwed in, its end is embedded in a limiting groove of the limiting disc 9, thereby preventing the clamping plate 25 from rotating relative to the rotating disk 8. The rotating disk 8 can be adjusted in elevation at the end of the clamping plate 25. After the elevation attitude of the surge arrester is adjusted to the correct position, the limiting bolt 10 is tightened again to complete the second stage of locking.

[0020] In one embodiment, both clamping plate 1 and clamping plate 5 have rounded rectangular holes in their middle parts. A reinforcing bolt 3 is threadedly connected to the middle part of clamping plate 1. One end of the fixing bolt 4 passes through the rounded rectangular hole and is threadedly connected to a fastening nut 21. Two constraint plates 2 are fixedly connected to the outside of clamping plate 1 and to the outside of the rounded rectangular hole to restrict the rotation of the fixing bolt 4.

[0021] It should be noted that, in this embodiment, when installing the clamping plate 1 and the constraint plate 2 to the corresponding installation position, the reinforcing bolt 3 located at the top is first passed through the rounded rectangular hole between clamping plate 1 and clamping plate 2 5, and a fastening nut 21 is threaded onto the end that passes through the middle of clamping plate 2 5. One end of the fixing bolt 4 is also inserted into the two constraint plates 2. Clamping plate 1 and clamping plate 2 5 are placed on both sides of the installation position, so that the fixing bolt 4 contacts the top of the installation position. Then, another fixing bolt 4 passes through the middle of clamping plate 1 and exits through the middle of clamping plate 2 5. Under the limitation of the constraint plate 2 and the end of the fixing bolt 4, the fastening nut 21 is tightened with a corresponding wrench. By pressing clamping plate 2 5, it is fixed in the designated position. When the installation position is an angle iron, the reinforcing bolt 3 is rotated so that its end is pressed and fixed with the inside of the angle iron, thereby making the connection between clamping plate 1 and the angle more stable and the force balanced.

[0022] In one embodiment, the anti-detachment part includes a one-way bearing 23, a limiting sleeve 24 that cooperates with the fastening nut 21 is fixedly connected inside the one-way bearing 23, a limiting piece 22 is fixedly connected to the outside of the one-way bearing 23, a guide groove 6 is provided on the side of the clamping plate 2 5, a limiting sleeve 20 that cooperates with the guide groove 6 is slidably connected to the clamping plate 2 5, and a groove that cooperates with the limiting piece 22 is provided in the middle of the limiting sleeve 20.

[0023] It should be noted that in this embodiment, a wrench is used to rotate the fastening nut 21, causing it to press and fix the clamping plate 5. Then, the limiting sleeve 24 is fitted onto the outside of the fastening nut 21. The one-way bearing 23 restricts the fastening nut 21 to rotate only in the tightening direction. By rotating the one-way bearing 23, the limiting piece 22 is kept in a vertical position. The limiting sleeve 20 is fitted onto the outside of the clamping plate 5 and constrained by the guide groove 6, causing it to move downwards. The limiting sleeve 20 is locked onto the outside of the limiting piece 22, thus providing strong anti-torque support for the limiting piece 22. When external vibration attempts to loosen the fastening nut 21, the reverse torque is transmitted through the fastening nut 21 to the inner ring of the limiting sleeve 24 and the one-way bearing 23. The limiting piece 22 on the outer ring then tries to rotate, but its rotational tendency is immediately locked onto the groove sidewall of the limiting sleeve 20. Since the limiting sleeve 20 is restricted by the guide groove 6 and cannot rotate, a strong mechanical interlock is formed, preventing any reverse rotation of the fastening nut 21 and achieving anti-loosening.

[0024] A surge arrester includes a surge arrester body 15, an insulating mounting base 14, and a thermally explosive disconnector 16. The surge arrester body 15 is fixedly connected to the top of the insulating mounting base 14, which is a surge arrester insulating base as described above. A high-voltage connection terminal 18 is fixedly connected to the top of the surge arrester body 15. A core 17 is installed inside the surge arrester body 15. The thermally explosive disconnector 16 is fixedly connected to the bottom of the surge arrester body 15 through the insulating mounting base 14. A protective layer 19 is provided on the outer side of the core 17.

[0025] It should be noted that in this embodiment, the thermal explosion disconnector 16 is connected in series in the arrester grounding circuit. It contains a propellant element and a mechanical actuation mechanism. When the arrester malfunctions, the abnormally large current flowing through it persists for a certain period, generating heat that melts the fusible element inside the disconnector or ignites the propellant, triggering the mechanical device to act rapidly. This forcibly pulls the arrester body away from the grounding system in a very short time, creating a significant air gap. First, the insulating mounting base 14 is placed in the installation position using clamp 1 and clamp 5. The fixing bolts 4 are pre-tightened. Then, the limiting bolts 13 and 10 are loosened sequentially, and the arrester is manually adjusted to the required horizontal and vertical angles. The two limiting bolts are then tightened. Finally, the locking nut 21 is thoroughly tightened with a wrench, and the anti-loosening mechanism is placed on the outside of the locking nut 21. When an overvoltage occurs, high voltage is applied to the core 17 through terminal 18, causing its resistance to drop sharply, discharging the current to ground. After the voltage returns to normal, the core 17 returns to its high-resistance state. If the core 17 is aged or damp, it may thermally collapse under system voltage, resulting in a continuous large current. This current flows through the thermally detonating disconnector 16, causing it to heat up and activate, forcibly disconnecting the grounding wire, isolating the faulty surge arrester from the system, preventing an explosion, and indicating the fault location.

[0026] In the description of this invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," "both ends," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, 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 limiting this invention.

[0027] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surge arrester insulating base, characterized in that: include: Insulating mounting base (14); An angle adjustment part is placed at one end of the insulating mounting base (14). The angle adjustment part includes a rotating disk (8) rotatably connected to the insulating mounting base (14). A second clamping plate (5) is adjustablely installed on the outer side of the rotating disk (8). A first clamping plate (1) is provided on one side of the second clamping plate (5). A fixing bolt (4) is installed between the first clamping plate (1) and the second clamping plate (5). An anti-loosening part is installed on the outer side of the second clamping plate (5) to prevent the fixing bolt (4) from loosening.

2. The surge arrester insulating base according to claim 1, characterized in that: The angle adjustment part also includes a rotating shaft (11) that is rotatably installed at one end of the insulating mounting base (14). The rotating shaft (11) passes through the insulating mounting base (14) and is fixedly connected to the limiting disk (12).

3. The surge arrester insulating base according to claim 2, characterized in that: The outer wall of the rotating disk (8) is fixed to the top of the limiting disk two (12). Multiple limiting grooves are provided at equal intervals on the outer side of the limiting disk two (12). The bottom of the insulating mounting base (14) is threaded with a limiting bolt two (13) for cooperating with the limiting groove.

4. The surge arrester insulating base according to claim 1, characterized in that: The middle part of the rotating disk (8) is rotatably connected to the end of the clamping plate (5). The middle part of the rotating disk (8) is fixedly connected to a limiting disk (9) with multiple limiting grooves. A limiting bolt (10) is bolted on one side of the clamping plate (5) to cooperate with the limiting groove to limit the rotating disk (8).

5. The surge arrester insulating base according to claim 1, characterized in that: Both the first clamp (1) and the second clamp (5) have rounded rectangular holes in their middle parts. The first clamp (1) is threaded with a reinforcing bolt (3) in its middle part. One end of the fixing bolt (4) passes through the rounded rectangular hole and is threaded with a fastening nut (21). Two constraint plates (2) are fixed to the outside of the first clamp (1) and outside the rounded rectangular hole to restrict the rotation of the fixing bolt (4).

6. The surge arrester insulating base according to claim 5, characterized in that: The anti-detachment part includes a one-way bearing (23), and a limiting sleeve (24) that cooperates with the fastening nut (21) is fixedly connected inside the one-way bearing (23). A limiting piece (22) is fixedly connected to the outside of the one-way bearing (23).

7. The surge arrester insulating base according to claim 6, characterized in that: The side of the clamping plate (5) is provided with a guide groove (6), and the clamping plate (5) is slidably connected with a limiting sleeve (20) that cooperates with the guide groove (6). The middle part of the limiting sleeve (20) is provided with a groove that cooperates with the limiting piece (22).

8. A surge arrester, characterized in that: The surge arrester includes a surge arrester body (15), an insulating mounting base (14), and a thermally explosive disconnector (16). The surge arrester body (15) is fixedly connected to the top of the insulating mounting base (14). The insulating mounting base (14) is a surge arrester insulating base as described in any one of claims 1-7. A high-voltage connection terminal (18) is fixedly connected to the top of the surge arrester body (15). A core (17) is installed inside the surge arrester body (15). A thermally explosive disconnector (16) is fixedly connected to the bottom of the surge arrester body (15) through the insulating mounting base (14). A protective layer (19) is provided on the outside of the core (17).

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