A lightning protection device for a power transmission line

Abstract

The utility model provides a kind of transmission line lightning arrester, belong to lightning protection technical field;Including: mounting bracket, insulator is fixedly arranged at the top of the mounting bracket;Mounting piece is arranged between the insulator and the mounting bracket;Lightning arrester is fixedly arranged at the top of the mounting piece;Limiting component is fixedly arranged on the side wall of the mounting bracket, and it is used for positioning the mounting piece;The limiting component includes: connecting shell is fixedly arranged on the mounting bracket;Rotary block is rotatably arranged at the top of the connecting shell;Extension rod first end is fixedly arranged on the side wall of the rotary block;Stand fixedly arranged on the second end of the extension rod away from the rotary block.The transmission line lightning arrester, mounting piece is accurately positioned by limiting component, ensure that extension rod can be stably rotated to the position where mounting piece is located, to realize the close adhesion of stand and mounting piece.

Description

Technical Field

[0001] This utility model belongs to the field of lightning protection technology, specifically relating to a lightning protection device for power transmission lines. Background Technology

[0002] A surge arrester is a critical electrical device used to protect electrical equipment from damage caused by lightning overvoltage and switching overvoltage, and its development history spans over a century. The earliest surge arrester was the horn-shaped gap, which appeared in the late 19th century and was mainly used in overhead transmission lines. In the 20th century, surge arrester technology underwent several major innovations, resulting in aluminum surge arresters, oxide film surge arresters, pellet surge arresters, tubular surge arresters, and silicon carbide valve surge arresters.

[0003] Chinese patent publication number CN222282758U discloses a lightning protection device for power transmission lines. Through the cooperation of an adjusting seat and a load-bearing rod, the device can be adjusted in angle as needed during use, making the installation more convenient and reducing the time required for installation. The adjusting seat allows the device to maintain stability while changing its angle during use, thus enabling the device to be connected to the power transmission line more quickly as needed. The load-bearing rod allows the device to rotate and be fixed at the required angle by changing its height.

[0004] Currently, surge arresters installed in power systems are typically at a certain height in their actual layout, often exceeding the height of adjacent insulators. This height difference can easily lead to accidental contact between the surge arrester's conductor and nearby wires, potentially causing short circuits or discharges. To avoid this, current installation methods typically involve rotating the mounting plates to adjust the surge arrester away from the conductor, increasing the electrical clearance between them. However, since the mounting plates are mostly fixed by pressing them against the insulator, this method lacks sufficient rigidity, allowing them to rotate under certain external forces. If external wind, equipment vibration, or other mechanical forces are significant, the mounting plates and the entire surge arrester may be pushed closer to the conductor, ultimately causing contact between the conductor and the conductor again, posing an operational risk. Utility Model Content

[0005] To address the problem of lightning arresters being unable to be positioned after adjustment in the existing technology, this utility model provides a lightning protection device for transmission lines. This device uses a mounting plate combined with a limiting component to achieve the effect of positioning the lightning arrester. The specific technical solution is as follows: A lightning protection device for transmission lines includes: a mounting frame; an insulator fixedly mounted on the top of the mounting frame; a mounting plate disposed between the insulator and the mounting frame; a lightning arrester fixedly mounted on the top of the mounting plate; and a limiting component fixedly mounted on the side wall of the mounting frame for positioning the mounting plate. The limiting component includes: a connecting shell fixedly mounted on the mounting frame; a rotating block rotatably mounted on the top of the connecting shell; a first end of an extension rod fixedly mounted on the side wall of the rotating block; and a vertical rod fixedly mounted on the second end of the extension rod away from the rotating block.

[0006] Preferably, a fixing seat is fixedly provided on the side wall of the mounting bracket, the fixing seat is detachably connected to the mounting bracket by a first locking bolt, and the connecting shell is fixedly provided on the fixing seat.

[0007] Preferably, the outer periphery of the pole is covered with a protective sleeve, which is made of an insulating elastic material.

[0008] Preferably, a fixed toothed ring is fixedly provided on the inner top wall of the connecting shell, and a sliding toothed ring is slidably and rotatably provided axially inside the connecting shell, the sliding toothed ring meshing with the fixed toothed ring; the sliding toothed ring and the rotating block are connected by a connecting rod, the connecting rod and the connecting shell being slidably and rotatably engaged; a spring is fixedly provided on the inner bottom wall of the connecting shell, the top end of the spring abutting against the bottom of the sliding toothed ring, the spring being configured to provide an elastic force to the sliding toothed ring toward the fixed toothed ring.

[0009] Preferably, the surge arrester is provided with a drain wire at its top, and the insulator is provided with an insulated wire at its top.

[0010] Preferably, a hook is fixedly provided at the end of the drain wire away from the surge arrester, and the hook is hung and electrically connected to the insulated wire to form a reliable electrical path.

[0011] Preferably, the hook includes: a housing fixedly disposed on the drain line; a screw threadedly connected to the housing in a vertical direction; a clamping block rotatably disposed at the top end of the screw and confined within the housing, wherein the clamping block can be driven to move in a vertical direction when the screw rotates, so as to clamp or release the insulated wire; and a knob fixedly disposed at the bottom of the screw.

[0012] Preferably, a wire clamp is provided on both sides of the hook on the insulated wire, and the two wire clamps are used together to stably clamp the insulated wire in a preset position.

[0013] Preferably, the wire clamp is internally fitted with an anti-slip sleeve, both ends of which extend beyond the clamping body of the wire clamp; the wire clamp is locked in place by a second locking bolt to adjust its clamping force on the insulated wire.

[0014] In addition, the lightning protection device for transmission lines in the above-mentioned technical solution provided by this utility model may also have the following features: the mounting plate is an integrally formed structure, which includes: a connecting part as the main frame; a hanging groove part is provided at one end of the connecting part, which has a groove for hanging on the top of the insulator; and an installation part is provided at the other end of the connecting part, which has a connection structure for fixing and installing the lightning arrester.

[0015] The lightning protection device for power transmission lines of this utility model has the following advantages compared with the prior art: 1. This surge arrester for transmission lines uses limiting components to precisely position the mounting plate, ensuring the extension rod can smoothly rotate to the location of the mounting plate, thus achieving a tight fit between the pole and the mounting plate. The interlocking structure between the toothed rings effectively prevents the mounting plate from shifting towards the conductor when subjected to external forces, significantly improving the safety of the surge arrester in transmission lines. Furthermore, by employing this simple and efficient fixing method of limiting components, the design of a more complex installation structure for the surge arrester is avoided. This simplifies the installation process and facilitates subsequent rapid replacement and flexible adjustment of the surge arrester, further improving maintenance efficiency and operational convenience.

[0016] 2. This lightning protection device for transmission lines utilizes a spring-loaded elastic rebound mechanism, ensuring the sliding toothed ring maintains a tight and stable contact with the fixed toothed ring, thus generating sufficient and reliable engagement force. This engagement force not only effectively prevents accidental rotation or loosening of the rotating block during operation but also further avoids situations where the mounting plate cannot be accurately aligned due to positional misalignment during installation. Overall, this design significantly improves structural stability while ensuring high precision during installation, providing crucial assurance for the long-term reliable operation of the equipment.

[0017] 3. This surge arrester for power transmission lines effectively limits the lateral movement of the hooks by symmetrically installing fixed clamps on both sides of the insulated conductor, preventing positional displacement due to external forces or vibrations during use. This design ensures that the hooks are always securely locked in the designated position on the insulated conductor, preventing accidental detachment from the conductor opening. This guarantees a stable and reliable electrical connection between the surge arrester and the conductor, enabling the surge arrester to continuously and normally perform its overvoltage protection function and effectively prevent damage to power system equipment from lightning strikes. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of the lightning protection device for power transmission lines provided by this utility model; Figure 2 for Figure 1 Enlarged view of point A; Figure 3 This is a front view schematic diagram of the limiting component provided by this utility model; Figure 4 A partial cross-sectional view of the limiting component provided by this utility model; Figure 5 A three-dimensional structural diagram of the limiting component provided by this utility model; Figure 6 A three-dimensional structural diagram of the mounting plate provided by this utility model; in, Figures 1 to 6 The reference numerals and component names in the attached drawings are as follows: 1. Mounting bracket, 2. Insulator, 3. Mounting plate, 4. Surge arrester, 5. Limiting component, 6. First locking bolt, 7. Drain wire, 8. Hook, 9. Insulated wire, 10. Wire clamp, 11. Anti-slip sleeve, 12. Second locking bolt, 31. Connecting part, 32. Hanging groove part, 33. Mounting part, 51. Fixing base, 52. Connecting shell, 53. Rotating block, 54. Extension rod, 55. Upright pole, 56. Protective sleeve, 57. Sliding toothed ring, 58. Fixed toothed ring, 59. Connecting rod, 510. Spring, 81. Outer shell, 82. Screw, 83. Clamping block, 84. Knob. Detailed Implementation

[0019] The following are specific implementation cases and appendices. Figures 1-6This utility model will be further described, but it is not limited to these embodiments. This utility model provides a technical solution: a lightning protection device for transmission lines, comprising: a mounting frame 1 as a basic support structure; an insulator 2 using a P15 or P10 type insulation structure, fixedly connected to the top of the mounting frame 1; a mounting plate 3 as a connecting transition component, arranged in the contact area between the insulator 2 and the mounting frame 1, serving to stabilize the connection; a surge arrester 4 as a lightning protection device, fixedly installed on the top surface of the mounting plate 3, used to guide and release overvoltage; and a limiting component 5 as a positioning structure, fixedly assembled to the mounting frame 1. The side wall portion functions to accurately position and constrain the mounting piece 3. The limiting component 5 specifically includes: a connecting shell 52 as a mounting base, fixedly mounted on the side wall surface of the mounting frame 1; a rotating block 53 as a rotation adjustment element, rotatably mounted on the top position of the connecting shell 52; an extension rod 54 as a connecting rod, with its first end fixedly connected to the side wall surface of the rotating block 53; and a vertical rod 55 as a limiting execution component, fixedly mounted on the second end of the extension rod 54 away from the rotating block 53. When the rotating block 53 is rotated and adjusted to the limiting position, the vertical rod 55 forms an abutment fit with the side surface of the mounting piece 3, thereby effectively limiting its displacement and ensuring the stability of the overall structure.

[0020] As a preferred option, a mounting base 51 is securely fixed to the side wall of the mounting bracket 1. This mounting base 51 is detachably connected to the mounting bracket 1 via a first locking bolt 6. This design allows for easy installation and removal of the mounting base 51, and also greatly facilitates subsequent maintenance and replacement. The connecting shell 52 is firmly fixed above the mounting base 51. Through precise fitting and fastening measures, the stability and reliability of the overall structure are further enhanced, ensuring that there will be no loosening or displacement during long-term use.

[0021] As a preferred option, the outer periphery of the pole 55 is further fitted with a protective sleeve 56 made of a highly insulating material. This sleeve not only possesses excellent insulation properties but also outstanding elasticity. This material is chosen to effectively isolate the pole from potential physical contact and electrical interference from the external environment, thereby preventing short circuits or damage caused by external factors. Simultaneously, the protective sleeve 56, with its good elasticity, can adapt to deformation requirements under different operating conditions, such as temperature changes, mechanical vibration, or external pressure, maintaining its structural integrity and functionality. This design significantly improves the reliability and safety of equipment operation, extends the service life of the pole, and reduces maintenance requirements.

[0022] As a preferred embodiment, a further step involves fixing an annular fixed-tooth ring 58 to the inner top wall of the connecting shell 52. This fixed-tooth ring 58 has a specific tooth profile for meshing and transmission with related components. A sliding toothed ring 57 is axially slidable and rotatable inside the connecting shell 52. The outer or inner circumference of the sliding toothed ring 57 has a tooth profile that matches that of the fixed-tooth ring 58, allowing the sliding toothed ring 57 to mesh with the fixed-tooth ring 58, thereby achieving power transmission or motion conversion. The sliding toothed ring 57 is connected to the rotating block 53 located within the connecting shell 52 via a connecting rod 59, which transmits motion and force. The connecting rod 59 and the connecting shell 52 are slidably and rotatably engaged through a specific mechanical structure, ensuring that the connecting rod 59 can smoothly move axially and rotate within the connecting shell 52. In addition, a spring 510 is fixedly installed on the inner bottom wall of the connecting shell 52. The top end of the spring 510 always abuts against the bottom of the sliding toothed ring 57, providing the sliding toothed ring 57 with a continuous elastic force toward the fixed toothed ring 58, thereby maintaining a stable meshing state between the sliding toothed ring 57 and the fixed toothed ring 58, and being able to compensate for position changes or absorb vibrations through elastic deformation when needed.

[0023] As a preferred option, the surge arrester 4 is further equipped with a precisely installed current-guiding wire 7. The main function of this current-guiding wire is to effectively guide the current in the system and prevent damage to the equipment caused by lightning strikes or operational overvoltages, thereby improving the system's overvoltage withstand capability. At the same time, the top of the insulator 2 is reliably connected to the insulated wire 9 by a strong binding method. This connection method not only ensures the mechanical stability and conductive continuity of the electrical connection, but also significantly improves the reliability and safety of the power system operation, effectively avoiding the risk of failure caused by poor connection.

[0024] As a preferred option, a robust metal hook 8 is fixedly installed at the end of the lead wire 7 away from the surge arrester 4. The hook 8 is reliably attached to the insulated wire 9 and the electrical connection between the two is achieved through a fastening connection, thereby forming a continuous, stable and electrical safety compliant conductive path between the surge arrester and the wire.

[0025] As a preferred embodiment, the hook 8 further comprises the following components: a housing 81 is fixedly connected to the drain line 7 to form a stable support structure; a screw 82 is arranged vertically and is adjustablely connected to the housing 81 via a threaded connection; a clamping block 83 is rotatably mounted on the top of the screw 82 and is constrained by the internal structure of the housing 81, allowing the screw 82 to drive the clamping block 83 to move up and down vertically during rotation, thereby achieving the function of clamping or releasing the insulated wire 9; in addition, a knob 84 is fixedly mounted on the bottom of the screw 82, providing a convenient operating interface for the user to control the operation of the entire clamping mechanism by rotating the knob.

[0026] As a preferred option, furthermore, a clamp 10 is installed on the left and right sides of the hook 8 on the insulated wire 9. The two clamps 10 are symmetrically distributed and can apply uniform clamping force from both sides at the same time. They work together to ensure that the insulated wire 9 is firmly clamped in the preset position and prevent it from shifting or loosening during operation.

[0027] As a preferred option, the clamp 10 is further reinforced with a high-quality anti-slip sleeve 11. This anti-slip sleeve is precision-made from high-strength insulating material, possessing not only excellent anti-slip and wear-resistant properties but also effectively isolating current, significantly improving electrical safety and preventing accidental electric shock. Both axial ends of the anti-slip sleeve 11 are designed to extend beyond the clamping body of the clamp 10, forming a thickened extra protective layer. This structure effectively prevents accidental displacement or surface wear of the conductor due to vibration, external pulling, etc., during installation or long-term use, extending the service life of the conductor and the clamp. Furthermore, the clamp 10 is equipped with a second locking bolt 12, which enables reliable locking. Operators can easily adjust this bolt according to actual installation needs, thereby precisely controlling the clamping force of the clamp on the insulated conductor 9. This adapts to conductors of different diameters and materials, and ensures the stability and electrical reliability of the connection point under various environmental conditions—such as temperature changes and mechanical vibration—ultimately guaranteeing the safe operation of the entire power distribution system.

[0028] As a preferred option, the mounting plate 3 further adopts an integrated molding structure, mainly composed of three parts: a connecting part 31, a hanging slot 32, and a mounting part 33. The connecting part 31 serves as the main frame of the entire mounting plate, providing support and connection, and possesses sufficient strength and rigidity. The hanging slot 32 is located at one end of the connecting part 31, and its structural design includes a slot specifically for hanging on the top of the insulator 2, ensuring stability and reliability during installation. The mounting part 33 is located at the other end of the connecting part 31, and is designed with a connection structure suitable for the fixed installation of the surge arrester 4, effectively bearing the weight of the surge arrester and resisting the influence of the external environment. The hanging slot 32 is interconnected with the mounting part 33 through the connecting part 31. This layout allows the installation position of the surge arrester 4 to be cantilevered relative to the hanging position of the insulator 2, facilitating installation and operation, and also enabling the surge arrester to perform optimally in actual use.

[0029] The insulators, surge arresters, drain wires, and insulated conductors in this case are existing technologies, and any insulators, surge arresters, drain wires, and insulated conductors that meet the requirements of this case are acceptable.

[0030] The specific types or circuit structures of the controllers for the electrical components mentioned in this application, as well as the circuit connection relationships between the electrical components and the accurate coordinated control of multiple power components, are all prior art. Therefore, the above content will not be elaborated in this application.

[0031] Working Principle: All electrical components described in this application are externally connected to a power supply and control switch during use. After installation, first check the installation, fixation, and safety precautions before use. During use, first, stably install the surge arrester 4 onto the mounting portion 33 of the mounting plate 3, ensuring a secure connection. Then, the operator loosens the insulator 2, accurately hangs the mounting slot 32 of the mounting plate 3 in the gap between the insulator 2 and the mounting frame 1, and then gradually tightens the insulator 2 to firmly fix the mounting plate 3 onto the mounting frame 1. Next, manually rotate the mounting plate 3 to adjust the position of the surge arrester 4, moving it away from the insulated conductor 9 to ensure that the current-carrying wire 7 cannot come into contact with or approach the insulated conductor 9, thereby eliminating potential safety hazards.

[0032] Next, the operator presses down on the rotating block 53. The rotating block 53, via the connecting rod 59, moves the sliding toothed ring 57 downwards until it completely disengages from the fixed toothed ring 58. At this point, the operator rotates the rotating block 53, causing the extension rod 54 to rotate close to the mounting plate 3, and the protective sleeve 56 to press tightly against the surface of the mounting plate 3. Then, the rotating block 53 is released. Under the elastic restoring force of the spring 510, the sliding toothed ring 57 automatically moves upwards and re-engages with the fixed toothed ring 58. This action locks the position of the rotating block 53, preventing it from rotating back. Through the blocking action of the upright rod 55, the mounting plate 3 is effectively fixed, avoiding the risk of the surge arrester 4 approaching the insulated conductor 9 due to external forces.

[0033] Next, the operator reliably connects the drain wire 7 to the hook 8. Then, a precise opening is cut into the surface of the insulated wire 9, allowing the bare wire inside to directly contact the hook 8, ensuring a stable electrical connection. The operator suspends the outer casing 81 on the wire and rotates the knob 84 to drive the screw 82, which in turn drives the clamp 83 to slide in a specific direction. This allows the clamp 83 and the outer casing 81 to work together to firmly hold the wire.

[0034] Finally, the staff took out two wire clamps 10, clamped them on both sides of the hook 8 respectively, and closed and tightened the wire clamps 10 with the second locking bolt 12. This operation effectively prevented the hook 8 from coming off the cut, further enhancing the stability and safety of the entire installation structure.

[0035] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lightning protection device for transmission lines, comprising: Mounting bracket (1), characterized in that, An insulator (2) is fixedly mounted on the top of the mounting bracket (1); Mounting plate (3) is disposed between the insulator (2) and the mounting frame (1); A surge arrester (4) is fixedly mounted on the top of the mounting plate (3); The limiting component (5) is fixedly disposed on the side wall of the mounting bracket (1) and is used to position the mounting piece (3). The limiting component (5) includes: The connecting shell (52) is fixedly mounted on the mounting bracket (1); A rotating block (53) is rotatably disposed on the top of the connecting shell (52); The first end of the extension rod (54) is fixedly mounted on the side wall of the rotating block (53); The upright (55) is fixedly installed at the second end of the extension rod (54) away from the rotating block (53).

2. The lightning protection device for transmission lines according to claim 1, characterized in that, A fixing seat (51) is fixedly installed on the side wall of the mounting bracket (1). The fixing seat (51) is detachably connected to the mounting bracket (1) by a first locking bolt (6). The connecting shell (52) is fixedly installed on the fixing seat (51).

3. The lightning protection device for transmission lines according to claim 1, characterized in that, The outer periphery of the pole (55) is covered with a protective sleeve (56), which is made of insulating elastic material.

4. The lightning protection device for transmission lines according to any one of claims 1 or 3, characterized in that, A fixed toothed ring (58) is fixedly provided on the inner top wall of the connecting shell (52). A sliding toothed ring (57) is slidably and rotatably provided in the connecting shell (52) along the axial direction. The sliding toothed ring (57) meshes with the fixed toothed ring (58). The sliding toothed ring (57) is connected to the rotating block (53) through a connecting rod (59). The connecting rod (59) is slidably and rotatably engaged with the connecting shell (52). A spring (510) is fixedly provided on the inner bottom wall of the connecting shell (52). The top end of the spring (510) abuts against the bottom of the sliding toothed ring (57). The spring (510) is configured to provide an elastic force to the sliding toothed ring (57) toward the fixed toothed ring (58).

5. The lightning protection device for transmission lines according to claim 1, characterized in that, The surge arrester (4) is provided with a drain wire (7) at the top, and the insulator (2) is provided with an insulated wire (9) at the top.

6. The lightning protection device for transmission lines according to claim 5, characterized in that, A hook (8) is fixedly provided at one end of the drain line (7) away from the surge arrester (4). The hook (8) is hung and electrically connected to the insulated wire (9) to form a reliable electrical path.

7. The lightning protection device for transmission lines according to claim 6, characterized in that, The hook (8) includes: The outer casing (81) is fixedly mounted on the drain line (7); The screw (82) is threaded to the outer casing (81) in the vertical direction; The clamp (83) is rotatably disposed at the top of the screw (82) and confined within the outer casing (81). When the screw (82) rotates, it can drive the clamp (83) to move in the vertical direction to clamp or release the insulated wire (9). The knob (84) is fixedly mounted on the bottom of the screw (82).

8. The lightning protection device for transmission lines according to claim 7, characterized in that, A wire clamp (10) is provided on both sides of the hook (8) on the insulated wire (9). The two wire clamps (10) are used together to stably clamp the insulated wire (9) in a preset position.

9. The lightning protection device for transmission lines according to claim 8, characterized in that, The wire clamp (10) is fixedly embedded with an anti-slip sleeve (11), and both ends of the anti-slip sleeve (11) extend beyond the clamping body of the wire clamp (10). The wire clamp (10) is locked and fixed by a second locking bolt (12) to adjust its clamping force on the insulated wire (9).

10. The lightning protection device for transmission lines according to claim 1, characterized in that, The mounting piece (3) is an integrally molded structure, comprising: The connecting part (31) serves as the main frame; The hanging groove (32) is provided at one end of the connecting part (31) and has a groove for hanging on the top of the insulator (2); The mounting part (33) is located at the other end of the connecting part (31) and has a connection structure for fixing the surge arrester (4).

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