A multi-stage lightning protection device for a power collection line of a wind farm

Abstract

This utility model discloses a multi-stage lightning protection device for wind farm collector lines, specifically relating to the field of lightning protection technology. It includes a lightning rod body with a conductive disk fixedly connected to its bottom. A multi-stage lightning protection assembly is located at the bottom of the conductive disk. The multi-stage lightning protection assembly includes a grounding conductive strip fixedly installed at the bottom of the conductive disk. A ceramic insulating cover is fixedly connected to the top of the inner wall of the grounding conductive strip. Ceramic insulating plates are provided on both sides of the grounding conductive strip, and both ceramic insulating plates are fixedly connected to the ceramic insulating cover. A lightning protection tip is fixedly connected to the top of the lightning rod body. This utility model uses a multi-stage lightning protection assembly to draw lightning to the conductive disk. The two ceramic insulating plates are spaced for insulation, and the ceramic insulating cover provides insulation protection, resulting in multi-stage lightning protection for wind farm collector lines and improved lightning protection effectiveness.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection technology, and more specifically, to a multi-level lightning protection device for wind farm collector lines. Background Technology

[0002] Lightning overvoltages are characterized by transient high energy, with peak values ​​reaching hundreds of kilovolts, which cannot be completely absorbed by single-stage protection. Multi-stage lightning protection devices reduce the impact through a multi-stage protection mechanism. The insulation level of wind power equipment is usually lower than that of lightning overvoltages. Multi-stage protection limits the overvoltage to the equipment's tolerance range, preventing insulation aging or breakdown.

[0003] Among the existing publicly available technical documents, patent publication number CN221509102U discloses a lightning protection device for power transmission lines. This technology connects the entire telescopic rod to the sleeve ring and mounting plate via a movable pin, allowing its extension component to swing left and right. When the wind force reaches a certain level, the support rod sways to a certain extent, thereby compressing the telescopic rod and inner tube to extend and retract, thus dissipating the force and significantly improving the wind resistance of the lightning protection device. However, this patent has the following drawbacks.

[0004] While multi-level lightning protection devices for wind farm collector lines can provide lightning protection through lightning arrestor points, they struggle to achieve multi-level lightning protection with gaps and insulation intervals during the lightning arrest process. This results in poor lightning protection effectiveness and low safety. Utility Model Content

[0005] To overcome the aforementioned deficiencies of the prior art, this utility model provides the following technical solution: a multi-stage lightning protection device for wind farm collector lines, comprising a lightning rod body, a conductive disk fixedly connected to the bottom end of the lightning rod body, and a multi-stage lightning protection assembly provided at the bottom end of the conductive disk; the multi-stage lightning protection assembly includes a grounding conductive strip fixedly disposed at the bottom end of the conductive disk, a ceramic insulating cover fixedly connected to the top of the inner wall of the grounding conductive strip, ceramic insulating plates provided on both sides of the grounding conductive strip, and both ceramic insulating plates fixedly connected to the ceramic insulating cover; and a lightning protection tip fixedly connected to the top end of the lightning rod body.

[0006] Preferably, the ceramic insulating cover has a concave vertical cross-section. Both the ceramic insulating cover and the ceramic insulating plate are made of ceramic material. The two ceramic insulating plates are symmetrically arranged about the conductive disk. The vertical cross-section of both ceramic insulating plates is concave. Two limiting rings are fixedly connected to the outer wall of the lightning rod body near the conductive disk, and a gap is provided between the two limiting rings. The cross-sectional shape of the two limiting rings is circular. A wiring screw is fixedly connected to the upper surface of the grounding conductive strip near both ends. A support ring is fixedly connected to the outer wall of each wiring screw. A nut is provided above the support ring, and the nut is threadedly connected to the wiring screw. Two mounting holes are opened on the lower surface of the grounding conductive strip, and the cross-sectional shape of the two mounting holes is circular.

[0007] When this technology is in use, after the lightning protection tip is struck by lightning, the lightning is attracted to the conductive plate, which in turn attracts the lightning to the grounding conductive strip, which then attracts the lightning to the wiring screw, and finally the wiring screw attracts the lightning to the grounding wire. The two ceramic insulating plates are spaced apart for insulation, and the ceramic insulating cover provides insulation protection.

[0008] Preferably, inclined protective components are installed on both sides of the ceramic insulating cover; each inclined protective component includes an inclined baffle fixedly installed on one side of the ceramic insulating cover, and an arc-shaped strip is fixedly connected to the inclined surface of one side of the inclined baffle. A support strip is installed on the inner wall of the arc-shaped strip, and both the arc-shaped strip and the inclined baffle are fixedly connected to the support strip; the arc-shaped strip is fixedly connected to the ceramic insulating cover. The vertical cross-sectional shape of the arc-shaped strip is circular, and the inclined baffle is made of ceramic material.

[0009] In use, the ceramic insulating cover supports the arc-shaped strip, the support strip supports the arc-shaped strip, and the support strip and arc-shaped strip provide support for the inclined baffle. The inclined baffle can achieve ceramic lightning protection insulation.

[0010] The technical effects and advantages of this utility model are as follows:

[0011] This utility model adopts a multi-level lightning protection component. After the lightning protection tip is struck by lightning, it attracts the lightning to the conductive plate, and the conductive plate attracts the lightning to the grounding conductive strip. The two ceramic insulating plates are insulated at intervals, and the ceramic insulating cover can provide insulation protection. This provides multi-level lightning protection for the wind farm's collector lines, resulting in better lightning protection effect.

[0012] 2. This utility model uses a ceramic insulating cover to support the arc-shaped strip, and the support strip supports the arc-shaped strip. The support strip and the arc-shaped strip provide support for the inclined baffle. The two inclined baffles achieve inclined lightning protection insulation protection, resulting in better lightning protection safety. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the main structure of the multi-level lightning protection device for wind farm collector lines according to this utility model.

[0014] Figure 2 This is a partial structural diagram of the connection between the lightning rod body and the conductive disk of this utility model.

[0015] Figure 3 This is a schematic diagram of a partial structure of the grounding conductive strip of this utility model.

[0016] Figure 4 This is a bottom view schematic diagram of the multi-stage lightning protection device for wind farm collector lines according to this utility model.

[0017] Figure 5 This is a partial structural diagram of the connection between the ceramic insulating cover and the inclined baffle of this utility model.

[0018] The attached diagram is labeled as follows: 1. Lightning rod body; 2. Conductive disc; 3. Grounding conductive strip; 4. Ceramic insulating cover; 5. Ceramic insulating plate; 6. Lightning rod tip; 7. Limiting ring; 8. Wiring screw; 9. Support ring; 10. Nut; 11. Mounting hole; 12. Arc-shaped strip; 13. Support strip; 14. Inclined baffle. Detailed Implementation

[0019] 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.

[0020] As attached Figure 1 - Appendix Figure 5 The present invention relates to a multi-stage lightning protection device for wind farm collector lines. The device is equipped with multi-stage lightning protection components, which provide multi-stage lightning protection for wind farm collector lines, resulting in better lightning protection performance. The specific structure of the multi-stage lightning protection components is as follows.

[0021] In this embodiment, as shown in the appendix Figure 1 - Appendix Figure 4As shown, a conductive disk 2 is fixedly connected to the bottom end of the lightning rod body 1, and a multi-level lightning protection assembly is provided at the bottom end of the conductive disk 2. The multi-level lightning protection assembly includes a grounding conductive strip 3 fixedly installed at the bottom end of the conductive disk 2, a ceramic insulating cover 4 fixedly connected to the top of the inner wall of the grounding conductive strip 3, and ceramic insulating plates 5 on both sides of the grounding conductive strip 3. Both ceramic insulating plates 5 are fixedly connected to the ceramic insulating cover 4. A lightning rod tip 6 is fixedly connected to the top end of the lightning rod body 1. The vertical cross-section of the ceramic insulating cover 4 is concave. Both the ceramic insulating cover 4 and the ceramic insulating plates 5 are made of ceramic material. The two ceramic insulating plates 5 are symmetrically arranged about the conductive disk 2. The vertical cross-section of both ceramic insulating plates 5 is concave.

[0022] In this embodiment, as shown in the appendix Figure 2 As shown, two limiting rings 7 are fixedly connected to the outer wall of the lightning rod body 1 near the conductive plate 2, and there is a gap between the two limiting rings 7. The cross-sectional shape of the two limiting rings 7 is circular, so that the hand can hold the lightning rod body 1 in the gap between the two limiting rings 7, thereby increasing the stability of the lightning rod body 1 and making it more stable when the grounding conductive strip 3 is installed.

[0023] In this embodiment, as shown in the appendix Figure 3 As shown, a connecting screw 8 is fixedly connected to the upper surface of the grounding conductive strip 3 near both ends; a support ring 9 is fixedly connected to the outer wall of each connecting screw 8, and a nut 10 is provided above the support ring 9. The nut 10 is threadedly connected to the connecting screw 8, so that by rotating the nut 10, the nut 10 and the connecting screw 8 move downward under the action of the thread transmission force, and the nut 10 presses the grounding wire onto the support ring 9 for tight fixing, thus performing the grounding wire bundle installation operation. Two mounting holes 11 are opened on the lower surface of the grounding conductive strip 3. The cross-sectional shape of the two mounting holes 11 is circular, so that screws can be inserted into the mounting holes 11 to fix the grounding conductive strip 3 at the external position of the wind farm's collector line.

[0024] When using this multi-stage lightning protection device for wind farm collector lines, the hand is held in the gap between the two limiting rings 7, while simultaneously holding and fixing the lightning rod body 1. The device is then screwed into the mounting hole 11, and the grounding conductive strip 3 is fixed to the outside of the wind farm collector line. The grounding conductive strip 3 supports the ceramic insulating cover 4, which provides concave-shaped insulation and lightning protection for the outside of the wind farm collector line. Simultaneously, the ceramic insulating cover 4 supports two ceramic insulating plates 5, which provide insulation and spacing protection for both sides of the conductive plate 2. Then, the ground wire is connected to the gap between the nut 10 and the support ring 9. By rotating the nut 10, the nut 10 and the connecting screw 8 move downward under the action of the thread transmission force. The nut 10 presses the ground wire on the support ring 9 to tighten and fix it. In this way, after the lightning protection tip 6 is struck by lightning, the lightning is attracted to the conductive plate 2, the conductive plate 2 attracts the lightning to the grounding conductive strip 3, the grounding conductive strip 3 attracts the lightning to the connecting screw 8, and the connecting screw 8 attracts the lightning to the ground wire. At the same time, the two ceramic insulating plates 5 are spaced for insulation treatment, and the ceramic insulating cover 4 can provide insulation protection.

[0025] In this embodiment, as shown in the appendix Figure 5 As shown, inclined protective components are installed on both sides of the ceramic insulating cover 4. Each inclined protective component includes an inclined baffle 14 fixedly installed on one side of the ceramic insulating cover 4, with an arc-shaped strip 12 fixedly connected to the inclined surface of one side of the baffle 14. A support strip 13 is installed on the inner wall of the arc-shaped strip 12, and both the arc-shaped strip 12 and the inclined baffle 14 are fixedly connected to the support strip 13. The arc-shaped strip 12 is fixedly connected to the ceramic insulating cover 4. The vertical cross-sectional shape of the arc-shaped strip 12 is circular, and the inclined baffle 14 is made of ceramic material.

[0026] In use, the ceramic insulating cover 4 supports the arc-shaped strip 12, and the support strip 13 supports the arc-shaped strip 12. In this way, the support strip 13 and the arc-shaped strip 12 provide support for the inclined baffle 14, so that the inclined baffle 14 can achieve ceramic lightning protection insulation. The two inclined baffles 14 achieve inclined lightning protection insulation.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage lightning protection device for a wind farm collector line, comprising a lightning rod body (1), wherein a conductive disk (2) is fixedly connected to the bottom end of the lightning rod body (1), characterized in that: The bottom of the conductive disk (2) is equipped with a multi-level lightning protection component; The multi-level lightning protection component includes a grounding conductive strip (3) fixedly installed at the bottom of the conductive disk (2). A ceramic insulating cover (4) is fixedly connected to the top of the inner wall of the grounding conductive strip (3). Ceramic insulating plates (5) are provided on both sides of the grounding conductive strip (3). Both ceramic insulating plates (5) are fixedly connected to the ceramic insulating cover (4). The top of the lightning rod body (1) is fixedly connected to a lightning protection tip (6).

2. The multi-stage lightning protection device for wind farm collector lines according to claim 1, characterized in that: The vertical cross-section of the ceramic insulating cover (4) is concave. Both the ceramic insulating cover (4) and the ceramic insulating plate (5) are made of ceramic material. The two ceramic insulating plates (5) are symmetrically arranged about the conductive disk (2). Both of the ceramic insulating plates (5) have concave vertical cross-sectional shapes.

3. The multi-stage lightning protection device for wind farm collector lines according to claim 1, characterized in that: Two limiting rings (7) are fixedly connected to the outer wall of the lightning rod body (1) near the conductive disk (2), and a gap is provided between the two limiting rings (7); Both of the limiting rings (7) have a circular cross-sectional shape.

4. A multi-stage lightning protection device for wind farm collector lines according to claim 1, characterized in that: The upper surface of the grounding conductive strip (3) and near its two ends are fixedly connected with wiring screws (8). Each of the terminal screws (8) has a support ring (9) fixedly connected to its outer wall. A nut (10) is provided above the support ring (9), and the nut (10) is threadedly connected to the terminal screw (8).

5. A multi-stage lightning protection device for wind farm collector lines according to claim 1, characterized in that: The lower surface of the grounding conductive strip (3) has two mounting holes (11), and the cross-sectional shape of the two mounting holes (11) is circular.

6. A multi-stage lightning protection device for wind farm collector lines according to claim 1, characterized in that: The ceramic insulating cover (4) is equipped with tilting protective components on both sides; The tilt protection assembly includes a tilt baffle (14) fixedly installed on one side of the ceramic insulating cover (4), and an arc strip (12) is fixedly connected to the tilted surface on one side of the tilt baffle (14). A support strip (13) is installed on the inner wall of the arc strip (12). The arc strip (12) and the tilt baffle (14) are both fixedly connected to the support strip (13). The arc-shaped strip (12) is fixedly connected to the ceramic insulating cover (4).

7. A multi-stage lightning protection device for wind farm collector lines according to claim 6, characterized in that: The vertical cross-section of the arc strip (12) is circular arc, and the inclined baffle (14) is made of ceramic material.

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