Lightning protection device for overhead line

Abstract

The utility model relates to an overhead line lightning protection device, which comprises a fixed shell and a puncture shell, the fixed shell comprises a base and an arc-shaped cover, a circular through hole is arranged between the base and the arc-shaped cover, and the puncture shell is slidably arranged in a puncture shell groove in the middle of the circular through hole. An insulated wire is arranged in the circular through hole and an inner cavity of the puncture shell in a penetrating mode, a thorn tooth set is arranged on the inner wall of the puncture shell, and the insulated wire is clamped and fixed through the fixing shell. According to the device, the fixed shell and the puncturing shell are arranged to separate the function areas for clamping, fixing and puncturing the insulated wire, the damage caused by shaking and twisting at the puncturing and clamping position of the insulated wire due to a severe environment is effectively prevented, the structure is simple, the size is small, the application range is wide, and the insulated wire is clamped more stably.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning protection for power transmission lines, in particular to an overhead line lightning protection device. Background Art

[0002] Lightning protection insulators are mainly used for supporting and protecting conductors from lightning. In order to improve the conductivity of lightning charges into the earth, piercing lightning protection insulators need to pierce the outer skin of the insulated conductor through the thorn teeth to achieve the lightning protection function. However, when using the thorn teeth to pierce the outer skin of the insulated conductor and clamp it, in the face of harsh environments such as typhoon season, the high-voltage conductor swings and sways greatly under the action of wind, which can easily cause serious strain on the clamping point of the conductor.

[0003] For example, the authorization announcement number CN 116316388 B discloses a lightning protection device for overhead lines of a power distribution network, which stably fixes the conductor between the upper and lower pressure blocks by means of a clamping wheel, effectively reducing the problem of the conductor being scratched by the teeth due to shaking and swinging during typhoons or strong winds. However, the device disclosed in the document has a complex structure, many structural components, and a large overall volume, and may have reliability issues when used in harsh environments. Utility Model Content

[0004] The purpose of the utility model is to provide an overhead line lightning protection device to solve the above-mentioned problems existing in the prior art.

[0005] In order to solve the above problems, the utility model provides an overhead line lightning protection device, including a fixed shell and a puncture shell, the fixed shell including a base and an arc-shaped cover, a circular through hole is provided between the base and the arc-shaped cover, the puncture shell is slidably arranged in a puncture shell groove in the middle of the circular through hole, the insulated wire is penetrated through the circular through hole and the inner cavity of the puncture shell, a thorn tooth group is provided on the inner wall of the puncture shell, and the fixed shell clamps and fixes the insulated wire.

[0006] The overhead line lightning protection device provided by the utility model also has the following technical features:

[0007] Furthermore, a composite shed is fixedly provided at the lower end of the base, an arc-extinguishing ball is provided below the composite shed, and an arc-starting rod is fixedly provided on the side wall of the base.

[0008] Furthermore, clamping blocks are fixedly provided at both ends of the circular through hole, and the clamping blocks clamp and fix the insulated wire.

[0009] Furthermore, the puncture shell includes two identical arc plates, the cavity between the arc plates is the inner cavity of the puncture shell, and the arc plates are fixedly connected by connecting ear plates; an ear plate groove communicating with the circular through hole is provided in the middle of the fixed shell, and the ear plate groove limits the sliding of the puncture shell.

[0010] Furthermore, the puncture shell also includes a ball and a ball cover, the ball is rotatably fixed by the ball cover in the ball groove of the outer wall of the arc plate, and the ball portion extends out of the puncture shell and is rollingly connected to the puncture shell groove.

[0011] Furthermore, a thorn block is fixedly provided between the two arc plates, and the thorn group is fixedly provided on the inner wall of the thorn block, and the thorn block punctures and clamps the insulated wire.

[0012] The utility model has the following beneficial effects: 1. The device separates the functions of clamping and fixing and puncturing the insulated wire by setting a fixed shell and a puncture shell, and by setting a ball between the fixed shell and the puncture shell to make the two slidably connected, the device can effectively prevent the puncture and clamping part of the insulated wire from being damaged by shaking and twisting in a harsh environment; 2. The device has a simple structure and a small size, and can be set in different types of overhead line lightning protection facilities that require puncturing of insulated wires, and has a wide range of uses; 3. The device can cope with different diameters of insulated wires, further improving the scope of use of the device; 4. The device uses a two-stage clamping and fixing method to clamp and fix the insulated wire, which can improve the stability of the insulated wire in the fixed shell, and the clamping of the insulated wire is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the fixed shell and the puncture shell of the utility model;

[0015] Figure 3 This is an exploded view of the fixed shell of the utility model;

[0016] Figure 4 It is an exploded view of the puncture shell of the utility model. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0018] like Figures 1 to 4In the embodiment of the overhead line lightning protection device of the utility model shown, the overhead line lightning protection device includes a fixed shell 1 and a piercing shell 2, the fixed shell 1 includes a base 11 and an arc cover 12, a circular through hole is provided between the base 11 and the arc cover 12, and a fixed ear plate 103 is provided on the base 11 and the arc cover 1, and the base 11 and the arc cover 12 are fixedly connected by the fixed ear plate 103; in addition, a composite umbrella skirt 4 is fixedly provided at the lower end of the base 11, an arc extinguishing ball 41 is fixedly provided below the composite umbrella skirt 4, and an arc-starting rod 5 is fixedly provided on the side wall of the base 11; it is worth noting that the exposed metal parts above the umbrella skirt are all wrapped with an insulating shell; the present device is an improvement on the conductor clamping part of the piercing lightning protection insulator, but the present device is not limited to being arranged at the conductor clamping part of the piercing lightning protection insulator, and can also be arranged in other types of overhead line lightning protection facilities that require piercing insulated conductors.

[0019] like Figure 1 As shown, the insulated wire 3 is passed through the circular through hole, and the fixed shell 1 clamps and fixes the insulated wire 3; specifically, as shown in FIG. Figure 2 , Figure 3 As shown, clamping blocks 13 are fixedly provided at both ends of the circular through hole, and the clamping blocks 13 clamp and fix the insulated wire 3. The clamping blocks 13 are fixedly provided in clamping block fixing grooves 104 at both ends of the circular through hole (i.e., both ends of the fixed shell 1). The clamping blocks 13 can cope with different diameters of the insulated wire 3, thereby improving the use range of the device; the insulated wire 3 is clamped and fixed by a two-stage clamping and fixing method, which can improve the stability of the insulated wire 3 in the fixed shell 1, and the clamping is more stable.

[0020] like Figures 2 to 4 As shown, the puncture shell 2 includes two identical arc plates 21, the cavity between the arc plates 21 is the inner cavity of the puncture shell 2, the insulated wire 3 is inserted into the circular through hole and the inner cavity of the puncture shell 2 (i.e. the cavity between the arc plates 21), and the inner wall of the puncture shell 2 is provided with a thorn tooth group to puncture the insulated wire 3 and clamp and fix the insulated wire 3; specifically, as Figure 3 , Figure 4 As shown, a thorn block 24 is fixed between the two arc plates 21, and the thorn block 24 is fixed in the thorn block groove 2102 on the inner wall of the arc plate. A thorn group is fixed on the inner wall of the thorn block 24, and the thorn block 24 punctures and clamps the insulated wire 3. The thorn block 24 and the clamping block 13 are both provided to cope with different diameters of the insulated wire 3 and improve the use range of the device.

[0021] like Figures 2 to 4As shown, the puncture shell 2 is slidably arranged in the puncture shell groove 101 in the middle of the circular through hole, and the sliding range of the puncture shell 2 is limited by the fixed shell 1; specifically, the arc plates 21 are fixedly connected by connecting ear plates 211; an ear plate groove 102 communicating with the circular through hole is provided in the middle of the fixed shell 1, and the ear plate groove 102 is arranged between two fixed ear plates 103 in the axial direction of the circular through hole; the connecting ear plate 211 extends out of the ear plate groove 102, and the bolt used to fix the connecting ear plate 211 extends out of the ear plate groove 102 by a certain distance (the distance is based on the bolt not affecting the sliding of the puncture shell 2), and the ear plate groove 102 achieves the effect of limiting the sliding of the puncture shell 2 by limiting the connecting ear plate 211; as shown Figure 2 As shown, the puncture shell 2 is slidably arranged in the fixed shell 1, and the puncture shell 2 can slide radially along the circular through hole in the fixed shell 1, or rotate circumferentially along the circular through hole, but the connecting ear plate 211 integrally arranged with the puncture shell 2 extends out of the ear plate groove 102, so the sliding range of the puncture shell 2 is limited by the fixed shell 1.

[0022] like Figure 3 , Figure 4 As shown, the puncture shell 2 is slidably arranged in the puncture shell groove 101 in the middle of the circular through hole through the ball 22, and the puncture shell 2 and the fixed shell 1 are only slidably connected by the ball 22 (the connecting ear plate 211 is a limit), specifically, the outer wall of the puncture shell 2 is provided with a ball 22 and a ball cover 23, the ball 22 is rotatably fixed in the ball groove 2101 of the outer wall of the arc plate 21 by the ball cover 23, the ball cover 23 is fixedly connected to the outer wall of the puncture shell 2, the ball 22 partially extends out of the outer wall ball cover 23 of the puncture shell 2 (the corresponding ball cover 23 is provided with a ball hole 2301), the ball 22 and the puncture shell groove 101 are in direct contact and rolling connection; therefore, the puncture shell 2 can slide in the fixed shell 1, specifically, the puncture shell 2 can slide in the radial direction of the circular through hole in the fixed shell 1, or rotate along the circumferential direction of the circular through hole, but the sliding range of the puncture shell 2 is limited by the fixed shell 1.

[0023] The overhead line lightning protection device provided by the utility model not only has a simple structure and a small size and thus has good reliability, but also distinguishes the functions of clamping and fixing the insulated wire and piercing the insulated wire by arranging a fixing shell 1 and a piercing shell 2, and arranging a ball 22 between the fixing shell 1 and the piercing shell 2 so that the two are slidably connected, so that the device can effectively prevent damage caused by shaking and twisting in a harsh environment at the piercing clamping position of the insulated wire.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An overhead line lightning protection device, characterized in that: The invention comprises a fixed shell (1) and a puncture shell (2), wherein the fixed shell (1) comprises a base (11) and an arc-shaped cover (12), a circular through hole is provided between the base (11) and the arc-shaped cover (12), the puncture shell (2) is slidably arranged in a puncture shell groove (101) in the middle of the circular through hole, an insulated wire (3) is inserted into the inner cavity of the circular through hole and the puncture shell (2), a thorn tooth group is provided on the inner wall of the puncture shell (2), and the fixed shell (1) clamps and fixes the insulated wire (3).

2. The overhead line lightning protection device according to claim 1, characterized in that: A composite shed (4) is fixedly provided at the lower end of the base (11), an arc extinguishing ball (41) is fixedly provided below the composite shed (4), and an arc striking rod (5) is fixedly provided on the side wall of the base (11).

3. The overhead line lightning protection device according to claim 1, characterized in that: Clamping blocks (13) are fixedly provided at both ends of the circular through hole.

4. The overhead line lightning protection device according to claim 1, characterized in that: The puncture shell (2) comprises two identical arc plates (21); the cavity between the arc plates (21) is the inner cavity of the puncture shell (2); the arc plates (21) are fixedly connected via connecting ear plates (211); an ear plate groove (102) communicating with the circular through hole is provided in the middle of the fixed shell (1); the ear plate groove (102) limits the sliding of the puncture shell (2).

5. The overhead line lightning protection device according to claim 4, characterized in that: The puncture shell (2) further comprises a ball (22) and a ball cover (23); the ball (22) is rotatably fixed by the ball cover (23) in a ball groove (2101) on the outer wall of the arc plate (21); the ball (22) partially extends out of the puncture shell (2) and is rollingly connected to the puncture shell groove (101).

6. The overhead line lightning protection device according to claim 4, characterized in that: A piercing tooth block (24) is fixedly provided between the two arc plates (21), and the piercing tooth group is fixedly provided on the inner wall of the piercing tooth block (24). The piercing tooth block (24) pierces the insulated wire (3) and clamps and fixes it.

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