High-voltage transmission line area lightning protection device

Abstract

The utility model discloses a high voltage transmission line area lightning rejection device, which comprises a base, a support rod, an ionization module and a passive fan, the support rod is arranged on the base, the ionization module is arranged at the top end of the support rod, the passive fan is arranged on the support rod, an air outlet of the passive fan is arranged at the bottom of the ionization module, and the air outlet of the passive fan is communicated with the ionization module. And the ionization module comprises an ionization rod mounting seat, an ionization rod and a spray point. According to the utility model, positive ions generated by the ionization module are quickly blown to the bottom of thundercloud through the passive fan, the charge neutralization process is accelerated, and compared with a traditional passive lightning arrester, the passive lightning arrester can reduce the local electric field intensity in a shorter time, effectively reduce the probability of thunder and lightning, and improve the lightning protection efficiency of a high-voltage transmission line area.

Description

Technical Field

[0001] This utility model relates to the technical field of power lightning protection, and in particular to a lightning protection device for high-voltage transmission lines. Background Technology

[0002] Currently, the passive lightning rods and lightning conductors commonly used in high-voltage transmission lines introduce lightning current to the ground by providing a lightning interception channel, which poses risks of thermal effects and local overvoltage. On the other hand, active lightning protection devices require an external high-voltage power supply to drive the ionization system, which is costly, complex to maintain, and has low reliability.

[0003] Passive surge arresters are based on the principle of self-excited corona discharge from the thundercloud's electric field. Through a multi-needle-tip effect, they create a potential trap at the bottom of the thundercloud, generating positive and negative ions. The positive ions are attracted to the negative charge of the thundercloud and rise, neutralizing it to reduce the local electric field strength and block the formation of the leader discharge channel, thus achieving non-stop lightning protection for the area. A typical product, such as a passive surge arrester, mainly consists of a needle rod, fiber electrodes, and a grounding base. Relying on the self-excited discharge of the thundercloud's electric field, it can continuously release dissipation current without external energy input, safely guiding lightning energy to the ground.

[0004] Existing passive lightning arresters are unable to continuously trigger corona discharge in environments with weak electric fields in thunderclouds, resulting in reduced positive ion generation efficiency. Furthermore, in atmospheric environments, ions mainly rely on positive ion diffusion and weak updrafts, leading to slow transport speeds to the clouds and poor lightning protection response time.

[0005] In the early stages or edge areas of thunderstorms, the lightning field strength is insufficient to trigger tip discharge, and the lightning protection device cannot provide enough positive ions in time, resulting in a delayed neutralization process and obvious protection blind spots. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a lightning protection device for high-voltage transmission lines. This device involves adding a passive fan to the bottom of the induced ionization device, using natural wind to achieve high-speed rotation of the impeller and generate directional airflow. This airflow efficiently blows the positive ions generated by the induced ionization device to the bottom region of high-altitude thunderclouds, accelerating charge neutralization, significantly improving lightning protection efficiency, and extending the effective protection radius.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A lightning protection device for high-voltage transmission lines includes a base, a support rod, an ionization module, and a passive fan. The support rod is mounted on the base, the ionization module is mounted on the top of the support rod, and the passive fan is mounted on the support rod. The outlet of the passive fan is located at the bottom of the ionization module. The ionization module includes an ionization rod mounting base, an ionization rod, and a discharge needle.

[0009] The ionization mounting base is fixed to the top of the support rod by a flange. The ionization mounting base is evenly provided with multiple mounting holes. The ionization rod is installed in the mounting holes, and the front end of the ionization rod is provided with multiple discharge needles.

[0010] The passive fan is mounted on the support rod via bearings. The passive fan includes a hood and a fixing ring. The fixing ring is located at the opening edge of the hood. The hood is connected to the support rod via bearing A. A fixing bracket is provided on the inner edge of the fixing ring. The fixing bracket is fixed to the support rod via bearing B. The passive fan generates an upward airflow, which transports the positive ions generated by the ionization module upward.

[0011] The mounting hole is threadedly connected to the ionization rod.

[0012] The base is equipped with a grounding interface, which is connected to a grounding wire to ensure that the generated charge can be safely introduced into the ground.

[0013] The bottom of the hood is equipped with a conical platform to prevent water accumulation.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. Improve lightning protection efficiency: The passive fan quickly blows the positive ions generated by the ionization module to the bottom of the thundercloud, accelerating the charge neutralization process. Compared with traditional passive lightning arresters, it can reduce the local electric field intensity in a shorter time, effectively reduce the probability of lightning, and improve the lightning protection efficiency of high-voltage transmission line areas.

[0016] 2. Expanded protection range: The directional airflow generated by the passive fan allows positive ions to be transported over a longer distance, extending the effective protection radius of the device, reducing blind spots, and providing reliable lightning protection for a wider range of high-voltage transmission lines.

[0017] 3. Simple structure and low cost: The device is mainly composed of a base, support rod, ionization module and passive fan. The structure is reasonably designed. The passive fan is driven by natural wind and does not require an external power supply, which reduces equipment cost and maintenance complexity.

[0018] 4. High stability: The base is equipped with a grounding interface, which can safely introduce the generated charge into the ground, ensuring the stability and safety of the device operation; the conical platform design at the bottom of the hood effectively prevents water accumulation and avoids affecting the device performance due to water accumulation, further improving the stability and reliability of the device. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a structural diagram of the inner bottom of the hood of this utility model;

[0022] In the diagram: 1. Base; 2. Support rod; 21. Bearing A; 22. Bearing B; 3. Passive fan; 31. Wind cap; 32. Fixing ring; 33. Fixing bracket; 34. Conical platform; 4. Ionization rod mounting base; 41. Mounting hole; 42. Flange; 5. Ionization rod; 51. Discharge needle. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0024] Example 1

[0025] like Figure 1-3 As shown, this utility model provides a lightning protection device for high-voltage transmission lines. Its structure includes a base 1 made of high-strength insulating material to ensure stable support of the entire device in harsh environments and to provide good insulation performance. Multiple mounting holes are provided at the bottom of the base 1 for easy fixing to the ground or tower using anchor bolts. A support rod 2 is vertically mounted on the base 1. The support rod 2 is made of lightweight, high-strength alloy material, such as aluminum alloy, which ensures sufficient strength to support the ionization module and passive fan while reducing the overall weight.

[0026] The ionization rod mounting base 4 is installed at the top of the support rod 2 via a flange 42. The flange 42 is welded or bolted to both the support rod 2 and the ionization rod mounting base 4 to ensure a secure connection. Six mounting holes 41 are evenly distributed on the ionization rod mounting base 4. These holes are threaded onto the ionization rod 5 for easy installation and removal. The ionization rod 5 is made of a highly conductive metal, such as a copper alloy, and has five discharge needles 51 at its front end. These needles have a sharp, needle-like structure to effectively improve the corona discharge effect.

[0027] A passive fan 3 is mounted on the support rod 2 via bearings A21 and B22. The fan cap 31 of the passive fan 3 features a streamlined design to reduce wind resistance and improve wind energy utilization efficiency. A fixing ring 32 is provided at the opening edge of the fan cap 31. The fixing bracket 33 on the inner edge of the fixing ring 32 is fixed to the support rod 2 via bearing B22. The fan cap 31 is connected to the support rod 2 via bearing A21, allowing the fan cap 31 to rotate flexibly. A conical platform 34 is provided at the bottom inside the fan cap 31. The slope of the conical platform 34 is 30°, which can effectively guide rainwater to flow outwards and prevent water accumulation.

[0028] Working Principle: Before a thunderstorm, when the electric field strength of the thundercloud gradually increases and reaches the trigger threshold of the ionization module (e.g., set to 300kV / m), the ionization module begins to self-excite corona discharge. The air around the discharge needle 51 at the front end of the ionization rod 5 is ionized, releasing a large number of positive ions. At this time, the natural wind in the atmosphere begins to blow the wind cap 31 of the passive fan 3. Under the action of the wind force, the wind cap 31 rotates at high speed around the support rod 2 through bearings A21 and B22. The rotation of the wind cap 31 drives the surrounding air flow, forming an upward airflow inside the wind cap 31. This airflow carries the positive ions generated by the ionization module upward. As the positive ions are continuously blown to the bottom of the thundercloud, the positive ions quickly combine with the negative ions at the bottom of the thundercloud, neutralizing the charge and reducing the local electric field strength. When the local electric field strength is reduced to a level where lightning leader discharge cannot form, the occurrence of lightning is effectively suppressed, protecting the high-voltage transmission lines below.

[0029] In practical applications, the device can be rationally deployed according to the distribution of high-voltage transmission lines and the characteristics of local thunderstorm activity. For example, in areas with frequent thunderstorms and densely packed transmission lines, the number of devices installed can be appropriately increased, and the installation height and angle can be adjusted appropriately to achieve the best lightning protection effect. Simultaneously, the device should be regularly inspected and maintained, such as checking for corrosion or damage to the ionization rod 5 and discharge needle 51, ensuring the smooth rotation of the passive fan 3, and verifying the proper grounding of the base 1, to ensure the device is always in normal working condition.

Claims

1. A lightning protection device for high-voltage transmission lines, characterized in that: The device includes a base, a support rod, an ionization module, and a passive fan. The support rod is mounted on the base, the ionization module is mounted on the top of the support rod, and the passive fan is mounted on the support rod. The air outlet of the passive fan is located at the bottom of the ionization module. The ionization module includes an ionization rod mounting base, an ionization rod, and a discharge needle.

2. A high-voltage transmission line area lightning protection device according to claim 1, characterized in that: The ionization mounting base is fixed to the top of the support rod by a flange. The ionization mounting base is evenly provided with multiple mounting holes. The ionization rod is installed in the mounting holes, and the front end of the ionization rod is provided with multiple discharge needles.

3. A high-voltage transmission line area lightning protection device according to claim 1, characterized in that: The passive fan is mounted on the support rod via bearings. The passive fan includes a hood and a fixing ring. The fixing ring is located at the opening edge of the hood. The hood is connected to the support rod via bearing A. A fixing bracket is provided on the inner edge of the fixing ring. The fixing bracket is fixed to the support rod via bearing B.

4. A high-voltage transmission line area lightning protection device according to claim 2, characterized in that: The mounting hole is threadedly connected to the ionization rod.

5. A high-voltage transmission line area lightning protection device according to claim 1, characterized in that: The base is equipped with a grounding interface for connecting to a ground wire.

6. A high-voltage transmission line area lightning protection device according to claim 3, characterized in that: The bottom of the windproof cap is provided with a conical platform.

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