Multi-cavity gap lightning arrester

Abstract

The utility model discloses a multi-cavity gap lightning arrester, which comprises a base, a multi-cavity lightning arrester body and a composite insulator, the multi-cavity lightning arrester body and the composite insulator are both arranged on the base, the multi-cavity lightning arrester body is used for extinguishing a power frequency arc, and the composite insulator is used for extinguishing the power frequency arc. The multi-cavity lightning arrester body comprises a composite jacket, metal electrodes, air chambers, a power frequency arc and air nozzles, a plurality of air chambers are arranged in the composite jacket, a pair of opposite metal electrodes are arranged in each air chamber, a certain gap is formed between the metal electrodes, one end of each air chamber is provided with the air nozzle, and the other end of each air chamber is provided with the power frequency arc. And the air jet holes are connected with the adjacent air chambers to form a serial air jet channel. According to the multi-chamber gap lightning arrester, by arranging the composite jacket and the top electrode, the action voltage of the multi-chamber gap lightning arrester can be reduced, the response speed and the release capability of the multi-chamber gap lightning arrester to lightning current are improved, and meanwhile, the mechanical strength and the weather resistance of the lightning arrester are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arresters, in particular to a multi-chamber gap lightning arrester. Background Art

[0002] A lightning arrester is an electrical device used to protect power systems and electrical equipment from lightning overvoltage and operating overvoltage. Common lightning arresters include multi-chamber gap lightning arresters. Multi-chamber gap lightning arresters are lightning arresters that use air as a medium and achieve lightning protection through a gap composed of multiple series-connected air chambers and metal electrodes. When a lightning current passes through the lightning arrester, an industrial frequency arc will be generated in a certain air chamber. The high-temperature and high-pressure gas generated by the arc will be transported to the adjacent air chamber through the jet port, thereby achieving multi-stage arc blowing, extinguishing the arc, and avoiding the occurrence of industrial frequency continuous current. Multi-chamber gap lightning arresters have the advantages of simple structure, no need for grounding, no valve failure and moisture problems, strong lightning release ability, and long service life.

[0003] However, the existing multi-chamber gap arrester still has some shortcomings, such as:

[0004] The operating voltage of multi-chamber gap arrester is high, which may cause the arrester to fail to operate in time, causing damage to the line by lightning current;

[0005] The insulation performance of multi-chamber gap arresters is poor and they are easily affected by environmental factors such as dirt and moisture, which reduces the lightning protection effect of the arrester;

[0006] The multi-chamber gap arrester has large dimensions and requires high installation space, which is not conducive to the widespread application of the arrester.

[0007] Therefore, it is necessary to improve the multi-chamber gap arrester to improve its operating voltage, insulation performance and installation convenience to meet the lightning protection needs under different power grid conditions. Utility Model Content

[0008] The purpose of the utility model is to solve the above technical problems, thereby providing a multi-chamber gap arrester;

[0009] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0010] The utility model provides a multi-chamber gap arrester.

[0011] It includes a base, a multi-cavity lightning arrester body, and a composite insulator. The multi-cavity lightning arrester body and the composite insulator are both arranged on the base. The multi-cavity lightning arrester body is used to extinguish the power frequency arc. The multi-cavity lightning arrester body includes a composite jacket, a metal electrode, an air chamber, a power frequency arc, and a jet nozzle. A plurality of air chambers are arranged inside the composite jacket. A pair of opposing metal electrodes are arranged in each of the air chambers, and a certain gap is formed between the metal electrodes. A jet nozzle is arranged at one end of the air chamber, and the jet nozzle is connected to the adjacent air chamber to form a series jet channel. When the power frequency arc is generated in a certain air chamber, the high-temperature and high-pressure gas can be transported to the adjacent air chamber through the jet channel, thereby realizing multi-stage arc blowing.

[0012] Optionally, a top electrode is provided at one end of the composite jacket away from the base.

[0013] Optionally, the composite insulator is configured to be rod-shaped or column-shaped, and a plurality of insulator sheets distributed along the axial direction are provided on the outer surface thereof to increase the insulation strength and pollution flashover resistance performance of the composite insulator.

[0014] Optionally, a grounding wire is provided at one end of the multi-cavity lightning arrester body for electrically connecting the multi-cavity lightning arrester body to the ground, so as to improve the lightning protection reliability of the multi-cavity lightning arrester body.

[0015] Optionally, a plurality of the air chambers are evenly spaced apart, and a plurality of the insulator sheets are evenly spaced apart.

[0016] Optionally, the shape of the metal electrode is set to be cylindrical, conical or other shapes that are conducive to generating a strong electric field, so as to reduce the operating voltage of the multi-cavity lightning arrester body and improve its lightning release capability.

[0017] Optionally, a skirt is provided on the composite jacket.

[0018] Beneficial effects of the utility model

[0019] The present application can reduce the action voltage of the multi-chamber gap arrester by providing a composite jacket and a top electrode, improve its response speed and release capacity to lightning current, and also increase the mechanical strength and weather resistance of the arrester;

[0020] The present application can enhance the insulation strength and pollution flashover resistance of the multi-chamber gap arrester by providing a composite insulator and a skirt, reduce the impact of environmental factors on the arrester, and also facilitate the installation and maintenance of the arrester;

[0021] The present application can optimize the structural design of the multi-chamber gap arrester by setting a uniform spacing between the air chamber and the insulator sheet, reduce its overall size, reduce its weight and cost, and improve its arc extinguishing efficiency and reliability;

[0022] The present application sets the shape of the metal electrode to be cylindrical, conical or other shapes that are conducive to generating a strong electric field, thereby reducing the operating voltage of the multi-chamber gap lightning arrester and improving its lightning release capability, while also reducing the wear and corrosion of the electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model.

[0024] Figure 2 It is a top view of the structure of the utility model.

[0025] Figure 3 It is a cross-sectional view of the structure of the utility model.

[0026] Explanation of the reference numerals: 1-base, 2-multi-cavity arrester body, 3-composite insulator, 4-composite jacket, 5-metal electrode, 6-jet outlet, 7-top electrode, 8-insulator sheet, 9-skirt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example

[0029] like Figure 1-Figure 3 As shown, the utility model provides a multi-chamber gap arrester.

[0030] It includes a base 1, a multi-cavity lightning arrester body 2, and a composite insulator 3. The multi-cavity lightning arrester body 2 and the composite insulator 3 are both arranged on the base 1. The multi-cavity lightning arrester body 2 is used to extinguish the power frequency arc. The multi-cavity lightning arrester body 2 includes a composite jacket 4, a metal electrode 5, an air chamber, a power frequency arc, and a jet nozzle 6. A plurality of air chambers are arranged inside the composite jacket 4. A pair of opposite metal electrodes 5 are arranged in each of the air chambers. A certain gap is formed between the metal electrodes 5. A jet nozzle 6 is arranged at one end of the air chamber. The jet nozzle 6 is connected to the adjacent air chamber to form a series jet channel. When a power frequency arc is generated in a certain air chamber, high-temperature and high-pressure gas can be transported to the adjacent air chamber through the jet channel, thereby realizing multi-stage arc blowing.

[0031] A top electrode 7 is provided at one end of the composite jacket 4 away from the base 1. The provision of the top electrode 7 can reduce the action voltage of the multi-chamber gap arrester, improve its response speed and release capacity to lightning current, and also increase the mechanical strength and weather resistance of the arrester;

[0032] The composite insulator 3 is configured to be rod-shaped or column-shaped, and a plurality of insulator sheets 8 distributed along the axial direction are provided on its outer surface to increase the insulation strength and pollution flashover resistance performance of the composite insulator 3;

[0033] One end of the multi-cavity lightning arrester body 2 is provided with a grounding wire for electrically connecting the multi-cavity lightning arrester body 2 to the ground, so as to improve the lightning protection reliability of the multi-cavity lightning arrester body 2;

[0034] The plurality of air chambers are evenly spaced apart, and the plurality of insulator sheets 8 are evenly spaced apart;

[0035] The shape of the metal electrode 5 is set to be cylindrical, conical or other shapes that are conducive to generating a strong electric field, so as to reduce the operating voltage of the multi-cavity lightning arrester body 2 and improve its lightning release capability;

[0036] The composite jacket 4 is provided with a skirt 9;

[0037] The multi-chamber gap lightning arrester of the present application is a lightning arrester that uses air as a medium and realizes the lightning protection function through a gap composed of multiple series-connected air chambers and metal electrodes 5. Its working principle is as follows:

[0038] Under normal circumstances, the multi-chamber gap arrester is in a high-impedance state, the gap between the metal electrodes 5 does not discharge, the air in the air chamber remains in an insulating state, and the impact of the arrester on the power grid can be ignored;

[0039] When the arrester is subjected to lightning overvoltage or operation overvoltage, the gap between the metal electrodes 5 will be broken down, generating a power frequency arc. The high temperature of the power frequency arc ionizes the air in the air chamber to form a high temperature and high pressure gas. The gas is transported to the adjacent air chamber through the jet port 6, thereby realizing multi-stage arc blowing, extinguishing the arc and avoiding the occurrence of power frequency continuous current.

[0040] When the power frequency arc is extinguished, the gas in the air chamber will cool down quickly, the air will return to the insulating state, the gap between the metal electrodes 5 will also return to the high impedance state, the arrester will stop discharging, and the power grid will resume normal operation;

[0041] The multi-chamber gap arrester of the present application is an electrical device for protecting medium voltage distribution lines from lightning overvoltage and switching overvoltage, and has the following advantages:

[0042] The lightning protection effect is significant: the multi-chamber gap lightning arrester of the present application uses air as a medium, and realizes the lightning protection function through a gap composed of multiple series-connected air chambers and metal electrodes 5. When the lightning current passes through the lightning arrester, an industrial frequency arc will be generated in a certain air chamber, and the high-temperature and high-pressure gas generated by the arc will be transported to the adjacent air chamber through the jet port 6, thereby realizing multi-stage arc blowing, extinguishing the arc, and avoiding the occurrence of industrial frequency continuous current. In this way, the multi-chamber gap lightning arrester of the present application can effectively discharge lightning current, protect the power system and electrical equipment, and will not cause malfunction of the relay protection device, thereby improving the reliability of power supply.

[0043] Large current capacity: The multi-chamber gap lightning arrester of the present application uses air as the medium, has excellent insulation self-recovery performance, can withstand multiple lightning strikes, and will not have problems such as valve aging and cracking. Therefore, the multi-chamber gap lightning arrester of the present application has a large current capacity, can withstand large lightning currents, and meet the lightning protection needs under different power grid conditions.

[0044] Good environmental adaptability: Since the multi-chamber gap arrester of the present application does not need to use sensitive components such as zinc oxide valve plates, the multi-chamber gap arrester of the present application will not be affected by environmental factors such as dirt and moisture, and has good environmental adaptability and can be applied to different climates and regions. At the same time, the multi-chamber gap arrester of the present application is also provided with a composite insulator 3 and a skirt 9, which can enhance the insulation strength and pollution flash resistance performance of the arrester, and further improve the lightning protection effect of the arrester.

[0045] Simple structure and easy installation: Since the multi-chamber gap arrester of the present application uses air as the medium, there is no need to use complex components such as zinc oxide valve plates. Therefore, the multi-chamber gap arrester of the present application has the characteristics of simple structure, light weight, and small appearance. It can be easily installed on the distribution line without the need for additional grounding devices and supporting structures. At the same time, the multi-chamber gap arrester of the present application also has self-cleaning performance, does not require regular cleaning and maintenance, and can reduce operating costs and maintenance difficulties.

[0046] Low cost and can be widely promoted: Since the multi-chamber gap arrester of the present application uses air as the medium, there is no need to use expensive components such as zinc oxide valve plates. Therefore, the multi-chamber gap arrester of the present application has the characteristics of low cost and high cost performance, which can save the investment and operating costs of the power system. At the same time, the multi-chamber gap arrester of the present application is also highly versatile and can be applied to distribution lines of different voltage levels. It can be widely promoted and applied to domestic power systems to improve the lightning protection level of the power grid;

[0047] The present application can reduce the operating voltage of the multi-chamber gap arrester by providing a composite jacket 4 and a top electrode 7, improve its response speed and release capability to lightning current, and also increase the mechanical strength and weather resistance of the arrester.

[0048] The present application can enhance the insulation strength and pollution flashover resistance of the multi-chamber gap arrester by providing the composite insulator 3 and the skirt 9, reduce the impact of environmental factors on the arrester, and also facilitate the installation and maintenance of the arrester.

[0049] The present application can optimize the structural design of the multi-chamber gap arrester by setting uniform intervals between the air chambers and the insulator plates 8, reduce its overall dimensions, reduce its weight and cost, and improve its arc extinguishing efficiency and reliability.

[0050] The present application sets the shape of the metal electrode 5 to be cylindrical, conical or other shapes that are conducive to generating a strong electric field, thereby reducing the operating voltage of the multi-chamber gap lightning arrester and improving its lightning release capability, while also reducing the wear and corrosion of the electrode.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A multi-chamber gap arrester, It is characterized in that It includes a base, a multi-cavity lightning arrester body, and a composite insulator. The multi-cavity lightning arrester body and the composite insulator are both arranged on the base. The multi-cavity lightning arrester body is used to extinguish the power frequency arc. The multi-cavity lightning arrester body includes a composite jacket, a metal electrode, an air chamber, a power frequency arc, and a jet nozzle. A plurality of air chambers are arranged inside the composite jacket. A pair of opposing metal electrodes are arranged in each of the air chambers, and a certain gap is formed between the metal electrodes. A jet nozzle is arranged at one end of the air chamber, and the jet nozzle is connected to the adjacent air chamber to form a series jet channel. When the power frequency arc is generated in a certain air chamber, the high-temperature and high-pressure gas can be transported to the adjacent air chamber through the jet channel, thereby realizing multi-stage arc blowing.

2. A multi-chamber gap arrester according to claim 1, It is characterized in that A top electrode is disposed at one end of the composite jacket away from the base.

3. A multi-chamber gap arrester according to claim 1, It is characterized in that The composite insulator is configured in a rod or column shape, and a plurality of insulator sheets distributed along the axial direction are provided on the outer surface of the composite insulator to increase the insulation strength and pollution flashover resistance performance of the composite insulator.

4. A multi-chamber gap arrester according to claim 1, It is characterized in that One end of the multi-cavity lightning arrester body is provided with a grounding wire for electrically connecting the multi-cavity lightning arrester body to the ground, so as to improve the lightning protection reliability of the multi-cavity lightning arrester body.

5. A multi-chamber gap arrester according to claim 3, It is characterized in that The plurality of air chambers are evenly spaced apart, and the plurality of insulator sheets are evenly spaced apart.

6. A multi-chamber gap arrester according to claim 1, It is characterized in that The shape of the metal electrode is set to be cylindrical or conical to reduce the operating voltage of the multi-cavity lightning arrester body and improve its lightning release capability.

7. A multi-chamber gap arrester according to claim 2, It is characterized in that The composite outer jacket is provided with a skirt.

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