A lightning protection insulator device for a power line

Abstract

The utility model relates to the technical field of insulating and lightning protection equipment of power collection line, especially a lightning protection insulator device of power collection line, including core rod, insulator, limiting piece, lightning protection connecting structure and arc leading piece, the insulator is sleeved in the outer periphery of core rod and has multiple umbrella skirts, the limiting piece is located at the lower end of core rod and axially limits the insulator, the lightning protection connecting structure contains first, second connecting parts that distribute up and down, both are fixed through detachable fastener and form the clamping cavity fixed core rod upper end, the trigger assembly and linkage assembly are equipped on it, the arc leading piece is metal material, one end is connected with lightning protection connecting structure, the other end extends, the device solves the problem that the existing insulator lightning protection assembly is easy to loosen, arc guiding is poor, the creepage distance is insufficient and maintenance is inconvenient, can enhance the reliability of insulation and lightning protection, the structure is stable and convenient to dismount, can improve the lightning stroke resistance of power collection line, reduces operation and maintenance cost.

Description

Technical Field

[0001] This utility model relates to the technical field of insulation and lightning protection equipment for power collection lines, and in particular to a lightning protection insulator device for power collection lines. Background Technology

[0002] In new energy projects such as wind power and photovoltaic power generation, collector lines play a crucial role in gathering and transmitting electrical energy generated by distributed power generation units to the substation. Exposed to the outdoor environment for extended periods, they must withstand complex conditions including lightning strikes, humidity, dirt accumulation, and strong wind vibrations. Lightning strikes are one of the main causes of collector line failures. When a collector line is struck by lightning, it generates instantaneous high voltage and surge current, which can easily puncture the insulation components and damage conductors, tower accessories, and other equipment, leading to line tripping, prolonged power outages, and severely impacting the power generation efficiency and operational stability of the new energy power plant.

[0003] Therefore, we propose a lightning protection insulator device for power collection lines. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lightning protection insulator device for a power line, comprising a core rod; an insulator sleeved on the outer periphery of the core rod; a limiting member disposed at the lower end of the core rod and cooperating with the core rod to form an axial limiting for the insulator; a lightning protection connection structure disposed at the upper end of the core rod; and an arc-guiding member having one end connected to the lightning protection connection structure and the other end extending away from the core rod; the lightning protection connection structure includes a first connecting part and a second connecting part distributed vertically, the first connecting part and the second connecting part being fixedly connected by detachable fasteners, and the lightning protection connection structure is provided with a triggering component for triggering lightning protection action and a linkage component cooperating with the triggering component.

[0006] Preferably, the insulator has a plurality of sheds spaced apart along the axial direction of the core rod, and each shed extends radially outward along the core rod.

[0007] Preferably, the first connecting part and the second connecting part are respectively provided with grooves on opposite sides, and the two grooves cooperate to form a clamping cavity for clamping the upper end of the mandrel; the detachable fastener includes a bolt and a nut, and the bolt passes through the first connecting part and the second connecting part in sequence and is screwed and fixed to the nut.

[0008] Preferably, the linkage component is fixed to the first connecting part and the second connecting part by a fixing member; the triggering component is located on the side of the linkage component facing the arc-initiating component, and a preset gap is left between the triggering component and the arc-initiating component.

[0009] Preferably, the arc-starting component is made of metal, and one end of it connected to the lightning protection connection structure has a connection hole, which is fixed to the lightning protection connection structure by bolts.

[0010] Preferably, the core rod is a glass fiber reinforced epoxy resin core rod; the limiting member is a limiting nut that is threaded to the outer circumference of the lower end of the core rod, and the outer diameter of the limiting nut is larger than the outer diameter of the lower end of the insulator.

[0011] The beneficial effects of this utility model are: By combining the core rod and the insulator with the multi-skirt structure of the insulator, the insulation performance can be effectively enhanced to meet the insulation requirements of the collector line. The limiting component provides stable axial positioning for the insulator, ensuring the stability of the overall structure. In the lightning protection connection structure, the first and second connecting parts are connected by detachable fasteners, which facilitates the installation, disassembly, and subsequent maintenance of the device. The triggering component and the linkage component work together to accurately trigger the lightning protection action, and the metal arc-initiating component can effectively guide the arc path, improve the reliability of lightning protection, and prevent line equipment from being damaged by lightning strikes. At the same time, the glass fiber reinforced epoxy resin core rod has high strength and aging resistance, and the nut-type limiting component has a simple structure and reliable limiting effect. The overall device takes into account insulation, lightning protection, structural stability, and ease of maintenance, and is suitable for lightning protection scenarios of collector lines. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the 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.

[0013] Figure 1 This is a schematic diagram of the isometric structure of this utility model.

[0014] Figure 2 This utility model Figure 1 A frontal view of the structure.

[0015] Figure 3 This utility model Figure 1 A magnified schematic diagram of the structure at point A.

[0016] Reference numerals in the attached figures: 1. Core rod; 2. Insulator; 3. Limiting component; 4. Arc-initiating component; 5. First connecting part; 6. Second connecting part; 7. Removable fastener; 8. Removable fastener; 9. Fixing component; 10. Triggering component; 11. Linkage component. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Example

[0021] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a lightning protection insulator device for a power line.

[0022] Specifically, to solve the above-mentioned technical problems, this utility model provides the following technical solution: including a core rod 1; an insulator 2 sleeved on the outer periphery of the core rod 1; a limiting member 3 located at the lower end of the core rod 1 and cooperating with the core rod 1 to form an axial limiting for the insulator 2; a lightning protection connection structure located at the upper end of the core rod 1; and an arc-guiding member 4 with one end connected to the lightning protection connection structure and the other end extending away from the core rod 1; the lightning protection connection structure includes a first connecting part 5 and a second connecting part 6 distributed vertically, the first connecting part 5 and the second connecting part 6 being fixedly connected by detachable fasteners 7 and 8, and the lightning protection connection structure is provided with a triggering component 10 for triggering lightning protection action and a linkage component 11 cooperating with the triggering component 10.

[0023] Furthermore, the insulator 2 has a plurality of sheds spaced apart along the axial direction of the core rod 1, each of the sheds extending radially outward along the core rod 1.

[0024] Furthermore, the first connecting part 5 and the second connecting part 6 are respectively provided with grooves on their opposite sides, and the two grooves cooperate to form a clamping cavity for clamping the upper end of the mandrel 1; the detachable fasteners 7 and 8 include bolts and nuts, and the bolts are screwed and fixed to the nuts after passing through the first connecting part 5 and the second connecting part 6 in sequence.

[0025] Furthermore, the linkage component 11 is fixed to the first connecting part 5 and the second connecting part 6 by the fixing part 9; the triggering component 10 is located on the side of the linkage component 11 facing the arc-inducing part 4, and a preset gap is left between the triggering component 10 and the arc-inducing part 4.

[0026] Furthermore, the arc-starting component 4 is made of metal, and one end of it connected to the lightning protection connection structure is provided with a connection hole, which is fixed to the lightning protection connection structure by bolts.

[0027] Furthermore, the core rod 1 is a glass fiber reinforced epoxy resin core rod; the limiting member 3 is a limiting nut that is threaded to the lower end of the core rod 1, and the outer diameter of the limiting nut is larger than the outer diameter of the lower end of the insulator 2. Firstly, the structural support and insulation guarantee for daily power transmission: Core rod 1 is made of glass fiber reinforced epoxy resin, possessing high strength and aging resistance. One end is connected to the conductor of the collecting line, and the other end is fixed to the tower via a lightning protection connection structure, providing the core support framework for the entire device. The insulator 2, fitted around the core rod 1, has multiple sheds spaced along the axial direction of the core rod 1, extending radially outwards, significantly increasing the creepage distance around the core rod 1. Even in humid, dirty outdoor environments, this effectively blocks the leakage of line current to the tower, while preventing the core rod 1 from being directly exposed to the external environment, ensuring the insulation performance of the collecting line during normal power transmission. The limiting member 3 at the lower end of the core rod 1 (a nut that mates with the threaded outer circumference of the lower end of the core rod 1) must be tightened clockwise during installation, ensuring its upper surface tightly presses against the lower surface of the insulator 2. Because the outer diameter of the limiting member 3 is larger than that of the insulator 2... The lower outer diameter can completely support the insulator 2, and at the same time, it works in conjunction with the upper lightning protection connection structure to limit the upper end of the insulator 2 (the clamping cavity sidewalls of the first connecting part 5 and the second connecting part 6 are attached to the upper outer periphery of the insulator 2). This double restriction prevents the insulator 2 from moving up and down along the core rod 1 axial direction, ensuring that the position of the insulator 2 is stable and the insulation function remains effective during daily use.Secondly, there is the lightning protection action during a lightning strike: When the collector line is struck by lightning, and a momentary high voltage and large current are generated in the line, the trigger component 10 (an overvoltage sensing element) on the linkage component 11 of the lightning protection connection structure first captures the overvoltage signal generated by the lightning strike and then triggers its own action—at this time, the preset gap reserved between the trigger component 10 and the arc ignition component 4 is instantaneously broken down, forming an initial arc channel; at the same time, the linkage component 11 remains stable under the action of the trigger component 10 (because the linkage component 11 is fixed to the first connection part 5 and the second connection part 6 through the fixing part 9, and the first connection part 5 and the second connection part 6 are tightly connected by detachable fasteners 7 and 8, and the grooves on opposite sides of the two form a clamping cavity that matches the shape of the upper end of the core rod 1, which can firmly clamp the upper end of the core rod 1 and ensure that the entire lightning protection connection structure is not loose), providing a basis for the stable action of the trigger component 10; and the second connection part 6 of the lightning protection connection structure The connected arc-initiating element 4 (made of metal with excellent conductivity, its connection end to the second connecting part 6 is fixed by its own connecting hole and bolt, ensuring a firm connection without detachment) guides the arc to its own surface after the initial arc is generated, thanks to its own metallic conductivity and its extension direction away from the core rod 1 (usually extending horizontally or downwards towards the outside of the tower). The arc is continuously released along the extension path of the arc-initiating element 4 and is eventually conducted to the tower grounding system through the arc-initiating element 4, realizing the discharge of lightning current to the ground. Throughout the process, the arc is always confined to the arc-initiating element 4 and will not come into contact with the core rod 1, insulator 2, or conductor of the collecting line. This effectively avoids the problem of the arc burning the insulator 2, causing insulation failure, breaking down the core rod 1, or damaging the conductor of the line. Finally, it completes the lightning protection of the collecting line and ensures that the line can quickly restore normal power transmission after a lightning strike.

[0028] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lightning protection insulator device for a current collector line, characterized in that, The system includes a core rod (1); an insulator (2) sleeved on the outer periphery of the core rod (1); a limiting member (3) located at the lower end of the core rod (1) and cooperating with the core rod (1) to axially limit the insulator (2); a lightning protection connection structure located at the upper end of the core rod (1); and an arc-guiding member (4) with one end connected to the lightning protection connection structure and the other end extending away from the core rod (1); the lightning protection connection structure includes a first connecting part (5) and a second connecting part (6) distributed vertically, the first connecting part (5) and the second connecting part (6) being fixedly connected by detachable fasteners (7, 8), and the lightning protection connection structure is provided with a triggering component (10) for triggering lightning protection action and a linkage component (11) cooperating with the triggering component (10).

2. The lightning protection insulator device for power collection lines according to claim 1, characterized in that, The insulator (2) has a plurality of skirts spaced apart along the axial direction of the core rod (1), each of the skirts extending radially outward along the core rod (1).

3. The lightning protection insulator device for power collection lines according to claim 1, characterized in that, The first connecting part (5) and the second connecting part (6) are respectively provided with grooves on their opposite sides, and the two grooves cooperate to form a clamping cavity for clamping the upper end of the mandrel (1); the detachable fasteners (7, 8) include bolts and nuts, and the bolts are screwed and fixed to the nuts after passing through the first connecting part (5) and the second connecting part (6) in sequence.

4. The lightning protection insulator device for power collection lines according to claim 3, characterized in that, The linkage component (11) is fixed to the first connecting part (5) and the second connecting part (6) by the fixing part (9); the trigger component (10) is located on the side of the linkage component (11) facing the arc-drawing part (4), and a preset gap is left between the trigger component (10) and the arc-drawing part (4).

5. The lightning protection insulator device for power collection lines according to claim 1, characterized in that, The arc-starting component (4) is made of metal, and one end of it connected to the lightning protection connection structure is provided with a connection hole. The connection hole is fixed to the lightning protection connection structure by bolts.

6. The lightning protection insulator device for power collection lines according to claim 1, characterized in that, The core rod (1) is a glass fiber reinforced epoxy resin core rod; the limiting member (3) is a limiting nut that is threaded to the outer circumference of the lower end of the core rod (1), and the outer diameter of the limiting nut is larger than the outer diameter of the lower end of the insulator (2).

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