A tank-type surge arrester based on zero-carbon environment-friendly gas insulation

Abstract

The application discloses a tank-type lightning arrester based on zero-carbon environment-friendly gas insulation, and relates to the technical field of electric power, which comprises a tank body, an upper core body and a lower core body are arranged in the tank body, the upper core body and the lower core body are installed in series in an insulating cylinder, an insulator is installed at the top of the tank body, a conductive rod is arranged at the lower part of the insulator, an upper shielding cover is installed outside the conductive rod, the top of the upper core body is connected with the conductive rod through a shielding seat, a protective cap is installed on the insulator, the bottom of the lower core body is fixed to the bottom of the inner cavity of the tank body, a voltage-sharing shielding cover is arranged on the insulating cylinder, the voltage-sharing shielding cover comprises an upper ring and a lower ring, the upper ring and the lower ring are connected through a plurality of telescopic rods, the upper ring is connected with the upper shielding seat, an inflation valve is arranged on the tank body, the inner cavity of the tank body is filled with clean air, compared with the original SF6 insulation, the clean air is zero-carbon and fluorine-free, and is pure green; the voltage-sharing shielding cover is designed as a telescopic structure, can adapt to lightning arresters of different models, and can achieve optimal voltage-sharing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric power, and particularly relates to a tank-type surge arrester based on zero-carbon environment-friendly gas insulation. BACKGROUND

[0002] A surge arrester is an electrical device used to protect electrical equipment from high transient overvoltages and limit the time of current flow and also limit the current value. The main material of the surge arrester is zinc oxide. The surge arrester is usually connected between the power grid conductor and the ground or connected beside the electrical winding or between the conductors. The surge arrester is also sometimes called an overvoltage protector. The surge arrester is mainly used to protect the power system from overvoltages such as lightning or operating surges, so as to ensure the safe operation of the power system. The tank-type surge arrester is a commonly used surge arrester. The tank-type surge arrester is made into a tank structure and is widely used in SF6 enclosed combined electrical apparatus (GIS).

[0003] At present, most of the tank-type surge arresters used in GIS are SF6 insulation, and a small amount are SF6 and N2 mixed gas insulation. The pressure in the tank is 0.5mpa. SF6 gas is a very strong greenhouse gas, and its greenhouse effect is 23900 times that of CO2 gas, which is easy to cause air pollution. On the other hand, different models of surge arresters of the same voltage grade generally use the same voltage-sharing shield, but the voltage-sharing shield is not completely suitable, thereby causing the potential distribution coefficient of part of the models of the surge arrester to be large, accelerating the aging of the resistance disc and seriously reducing the service life of the surge arrester. SUMMARY

[0004] In order to overcome the defects that air pollution is easy to be caused and the voltage-sharing shield is not completely suitable in the prior art, the present application provides a tank-type surge arrester based on zero-carbon environment-friendly gas insulation.

[0005] The technical scheme adopted by the present application to solve the technical problem is as follows: a tank-type surge arrester based on zero-carbon environment-friendly gas insulation, comprising a tank, an upper core body and a lower core body are arranged in the tank, the upper core body and the lower core body are installed in series in an insulation cylinder, an insulator is installed at the top of the tank, a conductive rod is arranged at the lower part of the insulator, an upper shield is installed outside the conductive rod, the upper core body is connected with the conductive rod through a shield seat, a protective cap is installed on the insulator, the bottom of the lower core body is fixed to the bottom of the inner cavity of the tank, a voltage-sharing shield is arranged on the insulation cylinder, the voltage-sharing shield comprises an upper ring and a lower ring, the upper ring and the lower ring are connected through a plurality of telescopic rods, the upper ring is connected with the upper shield, a gas filling valve is arranged on the tank, and the inner cavity of the tank is filled with clean air.

[0006] As a further improvement of the present application, an accessory box is arranged on the outer side of the tank, a low-voltage outgoing terminal is arranged in the accessory box, one end of the low-voltage outgoing terminal is connected with a monitor through a wire, and the other end of the low-voltage outgoing terminal is connected with the lower core body through a wire.

[0007] As a further improvement of the present application, the accessory box is installed on the tank body through the grounding row, and the monitor is connected to the grounding row through the wire.

[0008] As a further improvement of the present application, the insulator is an arc-shaped structure protruding towards the outside of the tank body.

[0009] As a further improvement of the present application, the protective cap is connected to the insulator through the bolt.

[0010] As a further improvement of the present application, the bottom of the inner cavity of the tank body is provided with a mounting groove for fixing the insulating cylinder, and a flange for fixing the lower core body is arranged on the mounting groove.

[0011] As a further improvement of the present application, the tank body is provided with an explosion-proof device.

[0012] As a further improvement of the present application, the tank body is made of aluminum.

[0013] Compared with the prior art, the present application has the beneficial effects: in the present application, the inner cavity of the tank body is filled with clean air, which is zero-carbon and green compared with the original SF6 insulation; the equalizing shield is designed as a telescopic structure, which is suitable for different models of lightning arresters and achieves the optimal equalizing effect, maximally reduces the uneven coefficient of potential distribution, slows down the aging of the resistance sheet, and increases the service life of the lightning arrester. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in combination with the drawings and specific embodiments.

[0015] Figure 1 FIG. 1 is a structural schematic diagram of a tank-type lightning arrester based on zero-carbon environmentally friendly gas insulation according to the present application.

[0016] Figure 2 FIG. 2 is a structural schematic diagram of an equalizing shield according to the present application.

[0017] In the figure: 1, protective cap; 2, insulator; 3, conductive rod; 4, upper shield; 5, shield seat; 6, upper core body; 7, equalizing shield; 71, upper ring; 72, telescopic rod; 73, lower ring; 8, insulating cylinder; 9, lower core body; 10, explosion-proof device; 11, wire; 12, tank body; 13, monitor; 14, accessory box; 15, low-voltage outgoing terminal; 16, grounding row; 17, inflation valve. DETAILED DESCRIPTION

[0018] In order to make the technical scheme and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with specific embodiments.

[0019] REFERENCE Figure 1The embodiment of the application discloses a tank-type lightning arrester based on zero-carbon environment-friendly gas insulation, which comprises a tank body 12, an upper core body 6 and a lower core body 9 are arranged in the tank body 12, the upper core body 6 and the lower core body 9 are installed in series in an insulation cylinder 8, an insulator 2 is installed at the top of the tank body 12, a lower portion of the insulator 2 is provided with a conductive rod 3, an upper shielding cover 4 is installed outside the conductive rod 3, a top portion of the upper core body 6 is connected with the conductive rod 3 through a shielding seat 5, a protective cap 1 is installed on the insulator 2, a bottom portion of the lower core body 9 is fixed to the bottom of the inner cavity of the tank body 12, a voltage-sharing shielding cover 7 is arranged on the insulation cylinder 8, the voltage-sharing shielding cover 7 is connected with the shielding seat 5, an inflation valve 17 is arranged on the tank body 12, and clean air is filled in the inner cavity of the tank body 12.

[0020] Wherein, the tank body 12 is provided with an accessory box 14 on the outer side, the accessory box 14 is provided with a low-voltage outgoing terminal 15, one end of the low-voltage outgoing terminal 15 is connected with a monitor 13 through a wire 11, the other end of the low-voltage outgoing terminal 15 is connected with the lower core body 9 through the wire 11, the accessory box 14 is installed on the tank body 12 through a grounding row 16, and the monitor 13 is connected with the grounding row 16 through the wire 11. The monitor 13 in the accessory box 14 can monitor the operation condition of the lightning arrester, so that the abnormal condition can be found in time and the fault can be found and eliminated quickly.

[0021] The inner cavity bottom of the tank body 12 is provided with a mounting groove for fixing the insulation cylinder 8, and a flange for fixing the lower core body 9 is arranged on the mounting groove, so that the stability of the upper core body 6 and the lower core body 9 is ensured.

[0022] Referring to Figure 2 The voltage-sharing shielding cover 7 comprises an upper ring 71 and a lower ring 73, the upper ring 71 and the lower ring 73 are connected through a plurality of telescopic rods 72, and the upper ring 71 is connected with the shielding seat 5.

[0023] The inner cavity of the tank body 12 is filled with clean air, and the pressure is 0.8mpa. Compared with the original SF6 insulation, the clean air is used for pressure, the pressure of the tank body can completely adapt, the cost increase can be completely ignored, the clean air is zero-carbon and fluorine-free, and is pure green. The voltage-sharing shielding cover 7 is designed as a telescopic structure, can adapt to different models of lightning arresters, and can achieve the optimal voltage-sharing effect. The uneven coefficient of potential distribution is reduced to the maximum extent, the aging of the resistance disc is slowed down, and the service life of the lightning arrester is increased.

[0024] The insulator 2 is an arc-shaped structure protruding towards the outer side of the tank body 12. The protective cap 1 is connected with the insulator 2 through bolts, so that the electric field and the potential distribution at the connection position of the insulator 2 and the tank body 12 are relatively uniform, and the electrical performance of each joint is ensured.

[0025] The tank body 12 is made of aluminum material, the aluminum material is light in quality, convenient to install and connect wires, and good in shielding effect. The tank body 12 is provided with an explosion-proof device 10. The explosion-proof device 10 can quickly release the gas with abnormally high pressure in the inner cavity of the tank body 12, so that the explosion accident is avoided.

[0026] It is to be understood that the specific embodiments described herein are merely illustrative of the present application and that all other embodiments not described here are within the scope of the present application.

Claims

1. A tank-type surge arrester based on zero-carbon environmentally friendly gas insulation, characterized in that: The tank (12) is made of aluminum. Inside the tank (12) are an upper core (6) and a lower core (9). The upper core (6) and the lower core (9) are connected in series and installed inside an insulating cylinder (8). The bottom of the inner cavity of the tank (12) is provided with an installation groove for fixing the insulating cylinder (8). The installation groove is provided with a flange for fixing the lower core (9). An insulator (2) is installed on the top of the tank (12). The insulator (2) is an arc-shaped structure that protrudes outward from the tank (12). A conductive rod (3) is provided at the bottom of the insulator (2). An upper shield is installed on the outside of the conductive rod (3). Cover (4); the top of the upper core (6) is connected to the conductive rod (3) through the shielding seat (5), the insulator (2) is equipped with a protective cap (1), and the bottom of the lower core (9) is fixed to the bottom of the inner cavity of the tank (12); the insulating cylinder (8) is provided with a pressure equalization shield (7), the pressure equalization shield (7) includes an upper ring (71) and a lower ring (73), the upper ring (71) and the lower ring (73) are connected by several telescopic rods (72), the upper ring (71) is connected to the upper shielding seat (5), the tank (12) is provided with an air filling valve (17), and the inner cavity of the tank (12) is filled with clean air.

2. A tank-type surge arrester based on zero-carbon environmentally friendly gas insulation according to claim 1, characterized in that: The outer side of the tank (12) is provided with an accessory box (14), and the accessory box (14) is provided with a low-voltage output terminal (15). One end of the low-voltage output terminal (15) is connected to the monitor (13) through a wire (11), and the other end of the low-voltage output terminal (15) is connected to the lower core (9) through a wire (11).

3. A tank-type surge arrester based on zero-carbon environmentally friendly gas insulation according to claim 2, characterized in that: The accessory box (14) is installed on the tank (12) via a grounding busbar (16), and the monitor (13) is connected to the grounding busbar (16) via a wire (11).

4. A tank-type surge arrester based on zero-carbon environmentally friendly gas insulation according to claim 3, characterized in that: The protective cap (1) is connected to the insulator (2) by bolts.

5. A tank-type surge arrester based on zero-carbon environmentally friendly gas insulation according to claim 4, characterized in that: The tank (12) is equipped with an explosion-proof device (10).

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