An overhead line lightning protection device

Abstract

The utility model discloses a lightning protection device for overhead line, including T type frame, the outer wall of T type frame places support, the outer wall of support has set up and passed through the hole, and the inner wall sliding connection of passed through the hole has lightning arrester body, the outer wall of support has set up and has connected the rectangular hole, and the inner wall sliding connection of rectangular hole has rectangular sleeve, the bottom of rectangular sleeve and the outer wall fixed connection of support, the inside fixed connection of rectangular sleeve has round rod, the outer wall fixed cover of round rod has set up V type metal sheet. The utility model discloses through T type frame multiple mounting hole fixed, lightning arrester bottom set up and passed through the hole cooperation heat explosion and disconnecter and nut fixed, and rectangular sleeve inclined type clamp block and V type metal sheet realize support quick clamping fixed, and the reliability of lightning arrester body and pole tower connection has been greatly improved, avoids the protection failure caused by installation deviation and external force, and simplifies the installation process simultaneously, reduces the risk of aerial work.

Description

Technical Field

[0001] This utility model relates to the field of lightning arrester technology, and in particular to a lightning protection device for overhead lines. Background Technology

[0002] The primary reason for the need for lightning protection in overhead power lines is that these lines are exposed to open fields or at high altitudes, making them susceptible to lightning strikes. Lightning strikes can damage line insulation, cause short circuits, tripping, and even equipment damage, thus affecting the safe operation of the power system. Therefore, taking effective lightning protection measures is crucial for ensuring the stable operation of the power system, and surge arresters are used in overhead lines to further enhance the effectiveness of lightning protection.

[0003] The main function of a surge arrester is to limit lightning overvoltage. When a lightning strike occurs, the surge arrester provides a low-impedance path to guide the lightning current to the ground, thereby limiting the voltage rise and protecting the safety of lines and equipment. The use of surge arresters can effectively reduce the damage of lightning strikes to lines and improve the reliability and safety of the system.

[0004] In existing technologies, the connection between surge arresters and towers in existing overhead lines mostly relies on a single bracket and bolt fixation, lacking a highly adaptable positioning structure. Existing surge arresters mostly rely solely on their own outer casing (such as porcelain bushings or composite jackets) for insulation protection, without designing protective structures for common external interferences in overhead lines. Therefore, we propose a surge protection device for overhead lines to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a lightning protection device for overhead lines.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lightning protection device for overhead lines includes a T-shaped frame. A support is placed on the outer wall of the T-shaped frame. A through hole is formed on the outer wall of the support. A lightning arrester body is slidably connected to the inner wall of the through hole. A rectangular hole is formed on the outer wall of the support. A rectangular sleeve is slidably connected to the inner wall of the rectangular hole. The bottom of the rectangular sleeve is fixedly connected to the outer wall of the support. A round rod is fixedly connected inside the rectangular sleeve. A V-shaped metal plate is fixedly fitted on the outer wall of the round rod. An inclined locking block is fixedly connected to the outer walls of both ends of the V-shaped metal plate. A threaded post is threadedly connected to the inner wall of the rectangular sleeve. A plastic rod is fixedly connected to the top of the threaded post. A connecting rod is fixedly connected to the outer wall of the plastic rod. A protective component is provided on the outer wall of the connecting rod.

[0008] Preferably, the protective component includes a nylon rope, one end of the connecting rod is fixedly connected to one end of the nylon rope, and the other end of the nylon rope is fixedly connected to a side-opening rubber sleeve. A wiring sleeve is fixedly connected to the outer wall of the side-opening rubber sleeve. The top of the surge arrester body is protected by setting the protective component.

[0009] Preferably, a thermal release device is threaded onto the bottom of the surge arrester body.

[0010] Preferably, the outer wall of the rectangular sleeve has two sliding holes, and the inner walls of the two sliding holes are slidably connected to the outer walls of the two inclined blocks, respectively, so that the two sliding holes assist the two inclined blocks in sliding.

[0011] Preferably, the side-opening rubber sleeve is fitted onto the top of the surge arrester body.

[0012] Preferably, the outer wall of the bracket has multiple mounting holes for mounting bolts.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This solution utilizes a T-shaped bracket with multiple mounting holes for fixation, a through hole at the bottom of the surge arrester for securing with a thermal release device and nut, and a rectangular sleeve with an inclined locking block and a V-shaped metal plate to achieve quick engagement and fixation of the bracket. This significantly improves the reliability of the connection between the surge arrester and the tower, avoids protection failures caused by installation deviations and external forces, simplifies the installation process, and reduces the risks of working at heights. By using a side-opening rubber sleeve and a wiring sleeve fitted from top to bottom onto the top of the surge arrester, it effectively shields small animals and foreign objects, reduces rainwater erosion and salt spray adhesion, lowers the probability of wet flashover, short circuits, and other faults, delays insulation degradation, extends the service life of the surge arrester, and ensures continuous power supply. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of a lightning protection device for overhead lines proposed in this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of a lightning protection device for overhead lines proposed in this utility model;

[0018] Figure 3 This utility model proposes a lightning protection device for overhead lines. Figure 2 A magnified structural diagram of part A in the diagram;

[0019] Figure 4 This is a partial three-dimensional structural diagram of a lightning protection device for overhead lines proposed in this utility model.

[0020] In the diagram: 1. T-shaped frame; 2. Bracket; 3. Surge arrester body; 4. Thermal release device; 5. Rectangular sleeve; 6. Round rod; 7. V-shaped metal sheet; 8. Slanted clamp; 9. Threaded post; 10. Plastic rod; 11. Connecting rod; 12. Nylon rope; 13. Side-opening rubber sleeve; 14. Cable routing sleeve. Detailed Implementation

[0021] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Depend on Figures 1-4 As shown, a lightning protection device for overhead lines is disclosed, comprising a T-shaped frame 1. The external structure of the T-shaped frame 1 can form a close fit support with the surface of the tower. A bracket 2 is placed on the outer wall of the T-shaped frame 1. Multiple mounting holes are opened on the outer wall of the bracket 2. A through hole is opened on the outer wall of the bracket 2. A surge arrester body 3 is slidably connected to the inner wall of the through hole. A thermal detonator 4 is threaded on the bottom of the surge arrester body 3, which ensures the tightness of the assembly of the two and facilitates the rapid separation of the thermal detonator 4 from the surge arrester body 3 when it is triggered after a fault, thereby avoiding the continuous connection of the faulty component to the grid and causing a power grid grounding accident.

[0023] The outer wall of the bracket 2 has a rectangular hole, and a rectangular sleeve 5 is slidably connected to the inner wall of the rectangular hole. The bottom of the rectangular sleeve 5 is fixedly connected to the outer wall of the bracket 2. A round rod 6 is fixedly connected inside the rectangular sleeve 5. A V-shaped metal piece 7 is fixedly sleeved on the outer wall of the round rod 6. The round rod 6 provides stable support for the V-shaped metal piece 7, ensuring that the elasticity of the V-shaped metal piece 7 is released evenly.

[0024] Both ends of the V-shaped metal sheet 7 are fixedly connected to inclined locking blocks 8. The outer wall of the rectangular sleeve 5 has two sliding holes. The inner walls of the two sliding holes are slidably connected to the outer walls of the two inclined locking blocks 8 respectively. When the bracket 2 is inserted, the V-shaped metal sheet 7 is compressed by the squeezing force, which drives the inclined locking blocks 8 to move inward. After the bracket 2 is in place, the V-shaped metal sheet 7 releases its elasticity, pushes the inclined locking blocks 8 outward and locks into the top of the bracket 2, thus achieving rapid fixation of the bracket 2.

[0025] The inner wall of the rectangular sleeve 5 is threaded with a threaded post 9, the top of the threaded post 9 is fixedly connected with a plastic rod 10, and the outer wall of the plastic rod 10 is fixedly connected with a connecting rod 11. The plastic rod 10 is made of insulating material, which has the advantage of avoiding the risk of electric conductivity and ensuring the safety of operation and maintenance personnel.

[0026] The outer wall of the connecting rod 11 is provided with a protective component, which includes a nylon rope 12. One end of the connecting rod 11 is fixedly connected to one end of the nylon rope 12, and the other end of the nylon rope 12 is fixedly connected to a side-opening rubber sleeve 13. The nylon rope 12 prevents the side-opening rubber sleeve 13 from being lost or falling.

[0027] A side-opening rubber sleeve 13 is fitted onto the top of the surge arrester body 3. A wiring sleeve 14 is fixedly connected to the outer wall of the side-opening rubber sleeve 13. The side-opening design makes it easy to fit the top of the surge arrester from above, and can be installed without disassembling the leads, simplifying the operation. The insulation and sealing properties of the rubber material can effectively block rainwater and salt spray, and prevent the terminals on the top of the surge arrester from getting damp and corroded. The wiring sleeve 14 is used for wiring of the high-voltage lines of the surge arrester body 3.

[0028] Working principle: In use, the T-shaped frame 1 is fixed to the tower of the overhead line through multiple mounting holes and bolts (nuts). Then, the bottom of the surge arrester body 3 is fitted into the through hole. Next, the thermal release device 4 is rotated and screwed into the bottom of the surge arrester body 3 to fix its position. The bracket 2 is then fitted into the rectangular sleeve 5 through the rectangular hole. During the fitting process, the inclined surfaces of the two inclined locking blocks 8 on the rectangular sleeve 5 contact the bottom of the bracket 2. The two inclined locking blocks 8 are subjected to compressive force and move inward along the two sliding holes. When the bottom of the bracket 2 contacts the top of the T-shaped frame 1, Two inclined blocks 8 slide outwards due to the elastic force of the V-shaped metal plate 7. The bottom of the two inclined blocks 8 is inserted into the top of the bracket 2 to fix the position of the bracket 2. The plastic rod 10 is rotated to screw the threaded post 9 into the rectangular sleeve 5, thereby fixing the connecting rod 11, nylon rope 12 and side-opening rubber sleeve 13 near the top of the surge arrester body 3. Then, the side-opening rubber sleeve 13 and the wiring sleeve 14 are put on the top of the surge arrester body 3 from top to bottom to provide shielding and reduce the failure of the surge arrester body 3 caused by external factors (such as small animals, foreign objects, wet flashover, salt spray, etc.).

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An overhead line lightning protection device comprising a T-shaped frame (1), characterized in that, The T-shaped frame (1) has a bracket (2) on its outer wall. The bracket (2) has a through hole on its outer wall. The inner wall of the through hole is slidably connected to the arrester body (3). The bracket (2) has a rectangular hole on its outer wall. The inner wall of the rectangular hole is slidably connected to a rectangular sleeve (5). The bottom of the rectangular sleeve (5) is fixedly connected to the outer wall of the bracket (2). A round rod (6) is fixedly connected inside the rectangular sleeve (5). A V-shaped metal piece (7) is fixedly fitted on the outer wall of the round rod (6). Both ends of the V-shaped metal piece (7) are fixedly connected to inclined clips (8). A threaded post (9) is threadedly connected to the inner wall of the rectangular sleeve (5). A plastic rod (10) is fixedly connected to the top of the threaded post (9). A connecting rod (11) is fixedly connected to the outer wall of the plastic rod (10). A protective component is provided on the outer wall of the connecting rod (11).

2. An overhead line lightning protection device according to claim 1, characterized in that, The protective component includes a nylon rope (12), one end of the connecting rod (11) is fixedly connected to one end of the nylon rope (12), and the other end of the nylon rope (12) is fixedly connected to a side-opening rubber sleeve (13), and a wiring sleeve (14) is fixedly connected to the outer wall of the side-opening rubber sleeve (13).

3. An overhead line lightning protection device according to claim 1, characterized in that, The bottom of the surge arrester body (3) is threaded with a thermal release device (4).

4. An overhead line lightning protection device according to claim 1, characterized in that, The outer wall of the rectangular sleeve (5) has two sliding holes, and the inner walls of the two sliding holes are slidably connected to the outer walls of the two inclined blocks (8).

5. An overhead line lightning protection device according to claim 2, characterized in that, The side-opening rubber sleeve (13) is fitted onto the top of the surge arrester body (3).

6. An overhead line lightning protection device according to claim 1, characterized in that, The outer wall of the bracket (2) has multiple mounting holes.

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