A lightning arrester convenient to disassemble and assemble

Abstract

The utility model discloses a kind of lightning arresters of lifting type convenient to disassemble and assemble, including lightning arrester main body and base, lightning arrester main body bottom is equipped with the installation rod of multiple fixed holes with positioning plane, base is equipped with the rod seat with through hole and installation plane, installation plane is equipped with telescopic rod and retaining mechanism with pressure spring. Through pressure spring drive telescopic rod automatic insertion fixed hole realizes quick locking, retaining mechanism locks telescopic rod to prevent accidental drop, after unlocking, pull out telescopic rod can be disassembled or adjust height. Realized tool-free quick disassembly, multi-gear lifting adjustment and double locking anti-loosening, significantly improve operation efficiency and operation reliability. It is suitable for installation maintenance of power system lightning arrester.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester technology, specifically to a surge arrester that is easy to disassemble and lift. Background Technology

[0002] Surge arresters are important overvoltage protection devices in power system transmission and transformation equipment. They are mainly used to limit lightning overvoltages and switching overvoltages, protecting transmission lines, transformers, switchgear, etc., from instantaneous high-voltage surges. Existing distribution or transmission type surge arresters are usually installed on poles, crossarms, or outdoor foundations, and operate under long-term exposure to the natural environment.

[0003] Currently, the common surge arrester installation structures in the industry mainly include the following forms: one is to directly fix the surge arrester base to the mounting bracket using a flange and bolts; another is to lock the surge arrester body to the tower crossarm using clamps. However, the above traditional installation methods have the following drawbacks in practical applications: First, disassembly and maintenance are inconvenient. The service life of surge arresters is usually shorter than the overall lifespan of power equipment, requiring regular inspections or replacements. Traditional bolted connections are prone to seizing due to corrosion after prolonged outdoor operation, making disassembly difficult. Especially when working at heights, maintenance personnel need to carry wrenches and other tools to disassemble multiple fasteners one by one, which is cumbersome, labor-intensive, and poses a safety hazard of falling from heights.

[0004] Secondly, the height adjustment flexibility is poor. Due to differences in terrain or equipment layout at the installation site, surge arresters sometimes need to be adjusted in height to meet electrical clearance or safety distance requirements. Traditional fixed bases cannot be height adjusted, usually requiring on-site cutting of the mounting rod or the addition of shims at the bottom, which not only makes it difficult to control precision but also seriously affects construction efficiency.

[0005] Therefore, there is an urgent need for a new type of surge arrester installation structure that can be easily and quickly disassembled and assembled, has a highly adjustable function, and has a stable and reliable connection, in order to solve the above-mentioned problems existing in the prior art. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides a surge arrester that is easy to disassemble and install.

[0007] The technical solution adopted by this utility model is: a surge arrester that is easy to disassemble and lift, including a surge arrester body and a base for mounting the surge arrester body; The arrester body has a mounting rod at its bottom, and the mounting rod has at least one positioning plane on its side wall, and multiple fixing holes are provided on the positioning plane along its length. The base includes a mounting base plate and a rod seat disposed on the mounting base plate. The rod seat and the mounting base plate are provided with through holes. One side of the rod seat is provided with a mounting plane disposed on the same side as the positioning plane. The mounting surface is provided with a telescopic hole that connects to the through hole, and a telescopic rod that can reciprocate is provided in the telescopic hole; A compression spring is fitted on the telescopic rod. The compression spring is configured to continuously apply a force to the telescopic rod in the direction of the through hole, so that the telescopic rod can be inserted into the fixing hole, thereby connecting the lightning arrester body to the base. The mounting surface is also provided with a retaining mechanism, which is used to lock the position of the telescopic rod when it is inserted into the fixing hole, and to allow the telescopic rod to exit the fixing hole when it is unlocked.

[0008] Furthermore, a limiting step is provided at the end of the telescopic rod away from the through hole; One end of the compression spring is connected to the limiting step, and the other end is connected to the mounting surface.

[0009] Furthermore, the retaining mechanism includes a fixed shaft and a retaining plate; The fixed shaft is connected to the mounting plane; The retaining plate is rotatably connected to the end of the fixed shaft by a pin. The retaining plate can rotate around the pin and selectively block or disengage from the end face of the limiting step to block or release the axial displacement of the telescopic rod.

[0010] Furthermore, the cross-section of the mounting rod is non-circular, and the shape of the through hole is adapted to the cross-sectional shape of the mounting rod to prevent the mounting rod from rotating relative to the rod seat.

[0011] Furthermore, the cross-section of the mounting rod is D-shaped or polygonal, and the positioning plane is a plane formed by cutting the side wall of the mounting rod.

[0012] Furthermore, the mounting base plate is provided with assembly holes for fixing to the ground or tower foundation.

[0013] Furthermore, the end of the telescopic rod near the through hole is provided with a chamfer or guide bevel to facilitate insertion into the fixing hole.

[0014] The beneficial effects of this utility model are: 1. It enables tool-free quick disassembly and assembly, greatly improving operation and maintenance efficiency.

[0015] Unlike traditional bolt fastening methods, this invention utilizes a pressure spring to automatically drive the telescopic rod into the fixing hole of the mounting rod, achieving a self-locking connection. During disassembly, simply rotate the retaining plate manually and pull out the telescopic rod against the spring force; no wrench or other auxiliary tools are required. This design significantly reduces the replacement time of the surge arrester, making it particularly suitable for high-altitude work environments and effectively reducing the labor intensity and operational risks for maintenance personnel.

[0016] 2. It has a height adjustment function and is highly adaptable.

[0017] By setting multiple spaced fixing holes on the mounting rod, and selectively inserting the telescopic rod, the installation height of the surge arrester body can be flexibly adjusted according to actual site requirements (such as avoiding obstacles, adjusting electrical clearance, or adapting to different voltage levels). Compared with the traditional crude adjustment method that requires cutting or adding shims, this utility model has high adjustment precision, is easy to operate, and has greater versatility.

[0018] 3. The dual-locking mechanism ensures extremely high operational reliability.

[0019] This invention not only relies on the elastic force of the pressure spring to maintain the position of the telescopic rod within the fixing hole, but also adds a retaining mechanism consisting of a fixed shaft and a retaining plate. When the retaining plate rotates to the blocking limit step, even if the surge arrester is subjected to severe vibration or strong wind load, it can physically prevent the telescopic rod from retracting, preventing loosening or pin retraction accidents caused by vibration, and significantly improving the safety and stability of power lines.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is an exploded view of the present invention.

[0023] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0024] Figure 4 This is a schematic diagram of the telescopic rod.

[0025] Figure 1-4In the middle: 1. Surge arrester body; 2. Base; 3. Mounting rod; 4. Positioning plane; 5. Fixing hole; 6. Mounting base plate; 7. Rod seat; 8. Through hole; 9. Mounting plane; 10. Telescopic hole; 11. Telescopic rod; 12. Compression spring; 13. Limiting step; 14. Fixing shaft; 15. Retaining plate; 16. Pin; 17. Assembly hole; 18. Chamfer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] This utility model provides a surge arrester that is easy to disassemble and install.

[0029] In this embodiment, refer to Figure 1-4 The easily detachable and retractable lifting surge arrester includes a surge arrester body 1 and a base 2 for mounting the surge arrester body; The arrester body has a mounting rod 3 at the bottom, and the mounting rod 3 has at least one positioning plane 4 on its side wall. The positioning plane 4 has multiple fixing holes 5 along its length. The base includes a mounting base plate 6 and a rod seat 7 disposed on the mounting base plate 6. The rod seat 7 and the mounting base plate are provided with through holes 8. One side of the rod seat is provided with a mounting plane 9 disposed on the same side as the positioning plane. The mounting plane 9 is provided with a telescopic hole 10 that connects to the through hole, and a telescopic rod 11 that can reciprocate is provided in the telescopic hole 10. A compression spring 12 is sleeved on the telescopic rod 11. The compression spring 12 is configured to continuously apply a force toward the through hole to the telescopic rod so that the telescopic rod can be inserted into the fixing hole, thereby connecting the lightning arrester body to the base. The mounting surface is also provided with a retaining mechanism, which is used to lock the position of the telescopic rod when it is inserted into the fixing hole, and to allow the telescopic rod to exit the fixing hole when it is unlocked.

[0030] In the above technical solution, the surge arrester body is inserted into the through hole of the base from top to bottom via the mounting rod at its bottom; the pressure spring continuously applies an elastic thrust toward the through hole to the telescopic rod, causing the telescopic rod to automatically extend into the corresponding height fixing hole on the mounting rod, thereby achieving rapid axial locking between the surge arrester body and the base; the retaining mechanism mechanically locks the position of the telescopic rod after it is inserted into place, preventing the telescopic rod from retracting under external force or vibration; when it is necessary to disassemble or adjust the height, the retaining mechanism is operated to release the lock, which overcomes the spring force and pulls the telescopic rod out of the fixing hole, allowing the mounting rod to return to an axially movable state, thereby allowing the surge arrester body to be disassembled or adjusted to the height position corresponding to other fixing holes.

[0031] Through the dual cooperation of spring self-locking and holding mechanism, tool-free quick disassembly and assembly and multi-level lifting adjustment between the surge arrester body and the base are realized, which greatly shortens the disassembly and assembly time during live work or maintenance. The holding mechanism effectively prevents the telescopic rod from accidentally coming out of the fixing hole due to wind vibration, accidental contact or spring fatigue, which significantly improves connection reliability and operational safety. The fit and guidance between the positioning plane and the installation plane ensures the precise alignment of the telescopic rod and the fixing hole, making the height adjustment operation smooth and the positioning accurate.

[0032] Specifically, a limiting step 13 is provided at the end of the telescopic rod away from the through hole; One end of the compression spring is connected to the limiting step 13, and the other end is connected to the mounting plane.

[0033] In this embodiment, the limiting step provides a stable force fulcrum for the compression spring. The preload of the spring makes the telescopic rod always tend to automatically insert into the fixing hole. Even in long-term outdoor vibration environment, it can maintain a reliable locking state. Moreover, this structure does not require additional spring seats or fasteners, has fewer parts, and is easy to assemble.

[0034] Specifically, the retaining mechanism includes a fixed shaft 14 and a retaining plate 15; The fixed shaft is connected to the mounting plane; The retaining plate is rotatably connected to the end of the fixed shaft by a pin 16. The retaining plate can rotate around the pin and selectively block or disengage from the end face of the limiting step to block or release the axial displacement of the telescopic rod.

[0035] In this embodiment, the telescopic rod can be reliably locked and quickly released by simply rotating the retaining plate. The operation is intuitive and requires no special tools. The retaining plate and the end face of the limiting step directly abut to form a rigid stop. Compared with the locking method that relies solely on spring friction, its impact resistance and vibration resistance are significantly enhanced. This effectively avoids the risk of the telescopic rod slipping out of the fixing hole under strong winds or accidental pulling, and improves the mechanical safety of the connection between the surge arrester body and the base.

[0036] Specifically, the mounting rod has a non-circular cross-section, and the shape of the through hole is adapted to the cross-sectional shape of the mounting rod to prevent the mounting rod from rotating relative to the rod seat.

[0037] In this embodiment, the cross-section of the mounting rod is designed as a non-circular structure such as a D-shape, ellipse, or polygon, and the inner contour of the through hole is machined into a matching non-circular shape. By utilizing the geometric asymmetry of the non-circular cross-section in the circumferential direction, a specific area of ​​the outer peripheral wall of the mounting rod and the inner peripheral wall of the through hole are made to fit or engage with each other, thereby eliminating the relative rotational freedom between the two and improving the smoothness of the lifting adjustment and the reliability of the locking.

[0038] Specifically, the cross-section of the mounting rod is D-shaped or polygonal, and the positioning plane is a plane formed by cutting the side wall of the mounting rod.

[0039] In this embodiment, based on a cylindrical or near-cylindrical mounting rod, a portion of the cylindrical surface is removed by cutting the sidewall material to form a positioning plane in a D-shaped or polygonal cross-section. This positioning plane is machined to match the inner contour of the through hole to fit the non-circular cross-section of the mounting rod, ensuring that the mounting rod can only pass through axially and cannot rotate. Furthermore, it serves a guiding and directional function.

[0040] Specifically, the mounting base plate is provided with mounting holes 17 for fixing to the ground or tower foundation.

[0041] In this embodiment, a through-hole is made in the mounting base plate. Fasteners such as anchor bolts, expansion bolts or U-shaped clamps are passed through the mounting hole to rigidly anchor the mounting base plate to the ground concrete foundation, tower crossarm or other supporting structure, so that the base becomes a fixed support base for the main body of the surge arrester.

[0042] Specifically, the end of the telescopic rod near the through hole is provided with a chamfer 18 or a guide bevel to facilitate insertion into the fixing hole.

[0043] In this embodiment, a chamfer, rounded corner, or guide slope is machined at the end of the telescopic rod near the through hole, so that the end forms a tapered or inclined transition structure that gradually narrows from the outside to the inside. When the mounting rod moves up and down in the through hole, if the end of the telescopic rod contacts the outer wall of the mounting rod or the edge of the fixing hole, the guide slope can generate a radial component force, guiding the end of the telescopic rod to slide along the outer wall of the mounting rod to the fixing hole opening, and then slide into the hole under the action of the spring thrust.

[0044] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A surge arrester that is easy to install and disassemble, characterized in that: Includes a surge arrester body and a base for mounting the surge arrester body; The arrester body has a mounting rod at its bottom, and the mounting rod has at least one positioning plane on its side wall, and multiple fixing holes are provided on the positioning plane along its length. The base includes a mounting base plate and a rod seat disposed on the mounting base plate. The rod seat and the mounting base plate are provided with through holes. One side of the rod seat is provided with a mounting plane disposed on the same side as the positioning plane. The mounting surface is provided with a telescopic hole that connects to the through hole, and a telescopic rod that can reciprocate is provided in the telescopic hole; A compression spring is fitted on the telescopic rod. The compression spring is configured to continuously apply a force to the telescopic rod in the direction of the through hole, so that the telescopic rod can be inserted into the fixing hole, thereby connecting the lightning arrester body to the base. The mounting surface is also provided with a retaining mechanism, which is used to lock the position of the telescopic rod when it is inserted into the fixing hole, and to allow the telescopic rod to exit the fixing hole when it is unlocked.

2. The easily disassembled and retractable lifting surge arrester according to claim 1, characterized in that: The telescopic rod is provided with a limiting step at the end away from the through hole; One end of the compression spring is connected to the limiting step, and the other end is connected to the mounting surface.

3. The easily disassembled and retractable lifting surge arrester according to claim 2, characterized in that: The retaining mechanism includes a fixed shaft and a retaining plate; The fixed shaft is connected to the mounting plane; The retaining plate is rotatably connected to the end of the fixed shaft by a pin. The retaining plate can rotate around the pin and selectively block or disengage from the end face of the limiting step to block or release the axial displacement of the telescopic rod.

4. The easily disassembled and retractable lifting surge arrester according to claim 1, characterized in that: The mounting rod has a non-circular cross-section, and the shape of the through hole is adapted to the cross-sectional shape of the mounting rod to prevent the mounting rod from rotating relative to the rod base.

5. The easily disassembled and retractable lifting surge arrester according to claim 4, characterized in that: The cross-section of the mounting rod is D-shaped or polygonal, and the positioning plane is a plane formed by cutting the side wall of the mounting rod.

6. The easily disassembled and retractable lifting surge arrester according to claim 1, characterized in that: The mounting base plate has assembly holes for fixing to the ground or tower foundation.

7. The easily disassembled and retractable lifting surge arrester according to claim 1, characterized in that: The telescopic rod has a chamfer or guide bevel at one end near the through hole to facilitate insertion into the fixing hole.

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