CN211405002U

CN211405002U - Supercharged single-recoil arc-extinguishing device

Info

Publication number: CN211405002U
Application number: CN202020297639.1U
Authority: CN
Inventors: 王嬿蕾; 王国锋; 徐宇恒; 庞智毅; 李心如; 张奇星; 段小嬿; 彭斐; 杨倩颖; 张清河; 王巨丰; 骆耀敬; 黄萍; 金星
Original assignee: Nanning Chaofu Electric Technology Co ltd
Current assignee: Nanning Chaofu Electric Technology Co ltd
Priority date: 2019-06-20
Filing date: 2020-03-11
Publication date: 2020-09-01
Anticipated expiration: 2030-03-11
Also published as: CN211238811U; CN211238810U; CN211238809U; CN112117645A; CN112117649A; CN211405001U; CN211404999U; CN112117643A; CN211405000U; CN211428571U; CN112117646A; CN112117653A; CN112117652A; CN112117650A; CN112117647A; CN112117644A; CN112117647B; CN112117648A; CN112117644B; CN112117648B

Abstract

The utility model discloses a single recoil arc extinguishing device of booster-type belongs to arc extinguishing lightning protection technical field, including striking subassembly, recoil pipe and lightning electrode, the recoil pipe sets up to hollow tubular structure, striking subassembly lid closes the top that sets up at the recoil pipe, the sealed inside bottom that sets up at the recoil pipe of lightning electrode, lightning electrode and outside earth connection contact setting. The sealing cover can increase the pressure of the backflush airflow during spraying, generate airflow with higher pressure and higher speed to cut off the electric arc, and improve the arc extinguishing effectiveness; the mouth of the back flushing pipe is provided with a metal sealing cover which has a traction effect on the flashover electric arc.

Description

Supercharged single-recoil arc-extinguishing device

Technical Field

The utility model relates to an arc extinguishing lightning protection technical field especially relates to a single recoil arc control device of booster-type.

Background

Lightning strike can bring different forms of damage and destruction to electric power facilities, and thundercloud discharge can cause lightning strike overvoltage in an electric power system, and the lightning strike overvoltage is divided into direct lightning strike overvoltage and induced lightning strike overvoltage. Lightning overvoltage can damage insulators and power transmission lines; the line insulator flashover is caused by impact flashover caused by lightning strike on the transmission line, and then large power frequency follow current is generated to damage the insulator string and hardware fittings, so that line accidents are caused; lightning strikes on a power transmission line or a lightning conductor can cause strand breakage and even breakage, so that power transmission work cannot be carried out.

The existing active type back-flushing arc extinguishing method utilizes the self energy of electric arc to cut off the electric arc, after the electric arc enters a semi-closed back-flushing pipe, the temperature of air in the pipe is rapidly raised by the high-temperature electric arc, the air pressure of the air in the pipe is multiplied after the air in the pipe is heated and expanded, high-speed strong airflow is finally sprayed out from the orifice of the back-flushing pipe, a cavity effect is generated at the orifice, meanwhile, the follow-up electric arc is blown off, and the continuity of the electric arc is.

Through years of research, the fact that for special occasions and higher voltage levels, larger arc extinguishing gas pressure is needed is found, and therefore the booster type single-recoil arc extinguishing device is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a single recoil arc control device of booster-type solves the technical problem that current recoil device cavity effect can not extinguish the high-voltage line electric arc of higher voltage level, and higher voltage level generally is several thousand kV's high-voltage line field.

The utility model provides a single recoil arc control device of booster-type, includes striking subassembly, recoil pipe and connects dodges the electrode, the recoil pipe sets up to hollow tubular structure, striking subassembly lid closes the top that sets up at the recoil pipe, connect and dodge the sealed inside bottom that sets up at the recoil pipe of electrode, connect and dodge the electrode and contact the setting with outside earth connection.

Furthermore, the arc striking component is arranged to be a metal sealing cover which is covered on the top of the back flushing pipe and can be turned over.

Further, the arc striking component comprises a fixed column, a rotating point, a sealing cover and a magnet, the fixed column is arranged at the top of the recoil pipe, the magnet is arranged on one side opposite to the fixed column and arranged at the top of the recoil pipe, the rotating point is arranged at the top end of the fixed column, and the sealing cover is rotatably arranged on the rotating point and is attracted to the magnet.

Furthermore, the top end of the recoil pipe is provided with a notch structure, the arc striking component covers the notch at the top of the recoil pipe in an inclined mode, and one side of the arc striking component can be arranged on the notch in a lifting mode.

Furthermore, the arc striking assembly comprises a fixed column, a rotating point and a sealing cover, the fixed column is arranged on the higher side of the notch structure at the top end of the recoil pipe, the rotating point is arranged on the fixed column, the sealing cover can be arranged on the rotating point in a turnover mode, the sealing cover is arranged to be a metal cover, and the sealing cover covers the notch structure.

Further, the sealing cover is of an oval metal cover structure, and the size of the oval metal cover structure is the same as the outer diameter of the notch structure at the top end of the back flushing pipe.

Furthermore, the arc striking component comprises a sealing cover and an arc striking cover, the sealing cover can be arranged at the top end of the recoil pipe in a lifting mode, and the arc striking cover is arranged at the top end of the recoil pipe, arranged on the edge of the sealing cover and not in contact with the sealing cover.

Furthermore, the sealing cover is rotatably arranged at the top end of the recoil pipe through a fixed column and a rotating point, the rotating point is fixed on the fixed column, a spring is arranged at the bottom of the other side of the sealing cover, one end of the spring is fixed at the top end of the recoil pipe, and the other end of the spring is fixed at the bottom of the sealing cover.

Furthermore, the arc striking cover is of a metal structure and is arranged in a funnel shape, and a water leakage hole is formed in the side edge of the bottom of the arc striking cover.

Furthermore, the lightning receiving electrode is of a metal structure, the shape of the lightning receiving electrode is the same as that of a hollow pipe in the backflushing pipe, and the side wall of the backflushing pipe is made of a high-strength high-temperature-resistant high-pressure-resistant non-conductive material.

A metal sealing cover is additionally arranged at an electric arc inlet of the back flushing pipe, and the sealing cover is a circular plate and has a certain thickness. The back-flushing pipe structure comprises a back-flushing pipe wall and a lightning receiving electrode, wherein the pipe wall is made of high-temperature-resistant and high-pressure-resistant insulating materials, such as ceramics and the like; the lightning receiving electrode can be a metal arc conducting ball, and one end of the back flushing pipe is blocked, so that a semi-closed space structure is formed.

The top end of the orifice of the back flushing pipe is provided with a fixed point for connecting the sealing cover and the back flushing pipe. And a rotary connecting point, such as a rotary shaft or a spherical movable device, is arranged at the upper end of the fixed point, so that the sealing cover can be opened and closed up and down. When the air pressure in the back flushing pipe is higher than the air pressure outside the pipe, the sealing cover is flushed away by strong air flow; after the air flow strength is weakened, the sealing cover is closed under the action of the spring. The two ends of the spring are connected with the fixed point and the sealing cover at the pipe orifice of the back flushing pipe, and the spring and the rotating connecting point can be arranged integrally or separately (the connecting spring is arranged near or at two sides of the rotating connecting point).

And a magnet is arranged at the top end of the orifice of the back flushing pipe opposite to the fixed point and is fixed at the top end of the orifice of the back flushing pipe. When the closing cap is in a closed state, the closing cap is attracted to the pipe orifice of the backflushing pipe by the magnet, and the effect of promoting the pressure of air flow in the pipe is increased. When the sealing cover is opened to be closed, the magnetic force of the magnet on the metal sealing cover enables the metal sealing cover to normally seal the orifice of the backflushing pipe.

Further, an annular inclined plane arc striking cover is additionally arranged at the periphery of the mouth of the backflushing pipe and the sealing cover, and the arc striking cover is made of metal and is fixed at the upper end of the mouth of the backflushing pipe. The lower end of the arc striking cover is provided with the plurality of round holes, so that rainwater in the arc striking cover can be discharged outside the backflushing arc extinguishing device, and the rainwater is prevented from being accumulated in the backflushing pipe. The arc striking cover made of metal has a traction effect on the flashover electric arc near the backflushing device, and can realize strict management and control of an electric arc flashover path.

Further, when an annular inclined arc striking cover is additionally arranged around the backflushing pipe orifice and the sealing cover, the sealing cover material used in the case can be metal or insulating material. When the sealing cover made of insulating materials is adopted, the arc striking function is mainly realized through the arc striking cover; if the sealing cover made of metal is adopted, the arc striking function is realized by the arc striking cover and the sealing cover together.

The utility model adopts the above technical scheme, the utility model discloses following technological effect has:

the sealing cover can increase the pressure of the backflush airflow during spraying, generate airflow with higher pressure and higher speed to cut off the electric arc, and improve the arc extinguishing effectiveness; a metal sealing cover is arranged at the orifice of the backflushing pipe, so that the backflushing pipe has a traction effect on the flashover electric arc, the path of the electric arc is better controlled, and the flashover electric arc smoothly enters the backflushing device; the arc striking cover is additionally arranged at the pipe orifice of the backflushing pipe and around the sealing cover, so that flashover electric arcs can be guaranteed to smoothly enter the backflushing device, rainwater can be prevented from being accumulated in the pipe, and the device is simple in structure, reasonable in design, reliable and feasible.

Drawings

Fig. 1 is a schematic view of a first pressurized recoil structure of the present invention.

Fig. 2 is a schematic view of the structure of the sealing cover of the present invention.

Fig. 3 is a schematic view of a second pressurized recoil structure of the present invention.

Fig. 4 is a top view of the arc-striking cover of the present invention.

Fig. 5 is a schematic diagram of the recoil structure of the present invention.

Fig. 6 is a flow chart of the recoil arc extinguishing operation of the present invention.

Fig. 7 is a schematic view of a third pressurized recoil structure of the present invention.

Description of the drawings: 1-backflushing the pipe; 2-lightning electrodes; 3-fixing the column; 4-rotation point; 5-sealing the cover; 6-a magnet; 7-arc striking cover; 8-water leakage holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, preferred embodiments are described in detail. It should be understood, however, that the numerous specific details set forth in the specification are merely set forth to provide a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

Example 1:

as shown in fig. 1-2, the utility model relates to a single recoil arc extinguishing device of booster-type, including striking subassembly, recoil pipe 1 and lightning receiving electrode 2, recoil pipe 1 sets up to hollow tubular structure, striking subassembly lid closes the top that sets up at recoil pipe 1, lightning receiving electrode 2 seals the inside bottom that sets up at recoil pipe 1, lightning receiving electrode 2 sets up with outside earth connection contact. The arc striking component is arranged as a metal sealing cover, covers the top of the back flushing pipe and can be turned over. The arc striking component comprises a fixed column 3, a rotating point 4, a sealing cover 5 and a magnet 6, wherein the fixed column 3 is arranged at the top of the recoil pipe 1, the magnet 6 is arranged on one side opposite to the fixed column 3 and arranged at the top of the recoil pipe 1, the rotating point 4 is arranged at the top end of the fixed column 3, and the sealing cover 5 is rotatably arranged on the rotating point 4 and is attracted to the magnet 6.

A metal sealing cover 5 is additionally arranged at an electric arc inlet of the back flushing pipe 1, the sealing cover 5 is a circular plate and has a certain thickness, generally 1-3cm, and the thickness can be adjusted according to the requirement and the tannin. The top end of the mouth of the back flushing pipe is provided with a fixed point for connecting the sealing cover 5 and the back flushing pipe 1. And a rotary connecting point, such as a rotary shaft or a spherical movable device, is arranged at the upper end of the fixed point, so that the sealing cover can be opened and closed up and down. A magnet 6 is arranged at the top end of the orifice of the back flushing pipe opposite to the fixed point, and the magnet 6 is fixed at the top end of the orifice of the back flushing pipe. When the closing cap is in a closed state, the closing cap is attracted to the pipe orifice of the backflushing pipe by the magnet, and the effect of promoting the pressure of air flow in the pipe is increased.

The magnet 6 can also be replaced by a spring, namely, the spring with not very strong elasticity, so that the sealing cover 5 further increases the pressure inside the recoil pipe 1, the cavity effect and the pressure explosion effect are more obvious, the electric arc with higher registered voltage can be recoiled and extinguished, and the arc extinguishing effect is better. When the pressure explosion effect occurs, the sealing cover 5 is lifted by the air pressure in the recoil pipe 1, and then high-pressure air is sprayed out from the top end of the recoil pipe 1, so that the better recoil effect is achieved, the arc is extinguished, and the arc extinguishing effect is very good.

Example 2:

the difference between this embodiment and embodiment 1 is that, as shown in fig. 7, the top end of the recoil pipe 1 is provided with a notch structure, the striking assembly obliquely covers the notch on the top of the recoil pipe 1, and one side of the striking assembly is arranged on the notch in a lifting way. The arc striking assembly comprises a fixed column 3, a rotating point 4 and a sealing cover 5, wherein the fixed column 3 is arranged on the higher side of the notch structure at the top end of the recoil pipe 1, the rotating point 4 is arranged on the fixed column 3, the sealing cover 5 can be arranged on the rotating point 4 in a turnover mode, the sealing cover 5 is a metal cover, and the metal cover covers the notch structure. The sealing cover 5 is of an oval metal cover structure, and the size of the oval metal cover structure is the same as the outer diameter of the notch structure at the top end of the recoil pipe 1. The sealing cover 5 is arranged to be of an inclined structure, so that the gravity of the sealing cover 5 is directly used for covering the recoil pipe 1, the gas pressure inside the recoil pipe 1 is increased, namely the gas pressure inside the recoil pipe 1 is larger than the gravity of the sealing cover 5 compared with the outside, the sealing cover 5 is lifted, a cavity effect and a pressure explosion effect are generated, the gas pressure after recoil is larger, and larger or stronger electric arcs can be extinguished.

Compared with the embodiment 1, the structure has the advantages that the number of constraint parts is reduced, loss is avoided, the service life is greatly prolonged especially in the field of electric arcs, and the requirements of customers are met.

Example 3:

this embodiment differs from the embodiment in that, as shown in fig. 3-4, the arc striking assembly comprises a cover 5 and an arc striking cover 7, the cover 5 is arranged at the top end of the recoil pipe 1 in a flip-flop manner, and the arc striking cover 7 is arranged at the top end of the recoil pipe 1 and arranged on the edge of the cover 5 without contacting the cover 5. The sealing cover 5 is rotatably arranged at the top end of the back flushing pipe 1 through a fixed column 3 and a rotating point 4, the rotating point 4 is fixed on the fixed column 3, a spring is arranged at the bottom of the other side of the sealing cover 5, one end of the spring is fixed at the top end of the back flushing pipe 1, and the other end of the spring is fixed at the bottom of the sealing cover 5. The arc striking cover 7 is of a metal structure and is arranged in a funnel shape, and a water leakage hole 8 is formed in the side edge of the bottom of the arc striking cover.

An annular inclined plane arc striking cover 7 is additionally arranged at the periphery of the opening of the backflushing pipe 1 and the sealing cover 5, and the arc striking cover is made of metal and is fixed at the upper end of the opening of the backflushing pipe. The lower end of the arc striking cover 7 is provided with a plurality of water leakage holes 8, rainwater in the arc striking cover can be discharged outside the backflushing arc extinguishing device, and the rainwater is prevented from being accumulated in the backflushing pipe. The arc striking cover 7 made of metal has a traction effect on the flashover arc near the backflushing device, and can realize strict management and control of an arc flashover path.

When an annular inclined arc striking cover 7 is additionally arranged around the opening of the back flushing pipe 1 and the sealing cover 5, the sealing cover material used in the case can be metal or insulating material. When the sealing cover made of insulating materials is adopted, the arc striking function is mainly realized through the arc striking cover 7; if a metal sealing cover is adopted, the arc striking function is realized by the arc striking cover 7 and the sealing cover 5 together. The arc striking cover 7 is additionally arranged, so that the arc striking effect is better, generally very small electric arcs can be directly introduced into the recoil pipe 1 for recoil, the effect is very good when the arc striking cover is used on power frequency insulation, arc striking and arc extinguishing are quickly realized, and flashover is prevented.

The lightning receiving electrode 2 is of a metal structure, the shape of the lightning receiving electrode is the same as that of an empty pipe structure in the recoil pipe 1, and the side wall of the recoil pipe 1 is made of a high-strength high-temperature-resistant high-pressure-resistant non-conductive material. The arc striking component is arranged to be a conductive metal ring, the outer side wall of the conductive metal ring is tightly attached to the inner wall of the recoil pipe, and the lightning receiving component is made of a conductive material. The high-strength high-temperature-resistant high-pressure-resistant non-conductive material is any one of alloy ceramic, rare earth ceramic, graphene-ceramic composite material, organic ceramic, synthetic silicone rubber, organic insulating material, alloy glass, rare earth glass, graphene glass and organic glass.

As shown in FIG. 5, the outer arc may be defined to have a velocity at the inlet v0, a pressure p0, a density ρ 0, and a temperature T0. After the outer arc enters the recoil assembly, an inlet arc velocity v1, a pressure p1, a density ρ 1 and a temperature T1 are formed. After passing through the arc striking assembly, the outlet arc speed v2 is p2, the pressure is p2, and the temperature is T2. The outer arc enters the recoil assembly through the inlet to form an inner arc, the inner arc is limited by the recoil assembly wall, the diameter is mechanically compressed by a large scale, and the temperature, the density, the pressure and the speed of the inner arc are all increased. Regardless of the arc energy loss and friction effects, when the inlet arc passes through the lightning strike assembly to achieve a resilient impact moment, v1 is considered to be-v 2, i.e., the inlet arc velocity is equal in magnitude and opposite in direction to the outlet velocity. Considering the energy loss and friction of the arc, after the inlet arc collides with the lightning receiving assembly, it is considered that | v2 | v1 | that the outlet velocity is smaller than the inlet velocity and the direction is opposite. The outlet arc is impeded by the inlet arc, which is smaller in diameter than the inlet arc, so that the outlet arc has a greater density, temperature and pressure than the inlet arc, i.e. ρ 2 > ρ 1, T2 > T1, p2 > p1, which in combination accelerate v2 more than v1, i.e. a2 > a 1. As the outlet arc diameter is increasingly compressed, resulting in an increase in outlet arc density, temperature and pressure, v2 > v1 eventually causes the outlet arc to rush out of the recoil assembly from the inlet. After the electric arc at the outlet rushes out of the recoil component, a cavity effect is formed on the external electric arc, the continuity of the electric arc is damaged, the energy of the electric arc is weakened, and the cutting and extinguishing of the electric arc are accelerated.

Considering that air exists in the recoil assembly, after the electric arc enters the recoil assembly, a series of effects and mechanisms are formed, so that the air in the recoil assembly is compressed, the air pressure in the recoil assembly is increased, the free stroke length of the electron is reduced, the ionization process is weakened and inhibited, the electric insulation strength is obviously improved, and the electric arc is favorably cut off and extinguished. According to experimental data, when air is compressed from 0.1Mpa (1atm) to 2.8Mpa, the breakdown voltage of the compressed air can be increased to 9-12 times of the standard air breakdown voltage (30kV/cm), and the electrical insulation strength is greatly improved. The original air in the recoil component is influenced by the temperature rise effect and the pressure rise effect in the recoil component, the generated jet air flow is jetted from the recoil component and acts on the outer electric arc, and the convection, radiation and conduction of the outer electric arc are accelerated by utilizing the cavity effect of the air flow on the outer electric arc, so that the electric arc is converted into dielectric property from electric conductivity, and the electric arc is self-extinguished.

As shown in fig. 6, when the lightning flashover arc approaches the structure of the present application, the arc striking electrode forms an upward motion by physical touch, coulomb force action or point discharge to the flashover arc, the arc is drawn near the inlet of the first recoil pipe, the outer arc is drawn by the arc striking component of the first recoil pipe to enter the superfine recoil pipe, wherein the inner diameter of the recoil pipe is far smaller than the diameter of the arc, the arc column is filled by the narrow pipe in the recoil pipe, the arc is limited by the pipe wall in the recoil unit, the diameter of the arc column is forcibly reduced, the conductive cross-sectional area of the whole arc is reduced, the arc resistance is increased,from the power calculation formula: p ═ I²R, the electric arc power is increased, so that the heat and the temperature in the tube are increased, which is power temperature rise, meanwhile, 180-degree opposite impact collision is generated between the inlet electric arc and the outlet electric arc in the tube, a channel for arc radiation, convection, conduction and loss is cut off, heat dissipation is blocked, the temperature is further increased, which is blocking temperature rise, the density of the electric arc plasma in the tube is sharply increased, the friction and the collision among particles are accelerated, the heat and the temperature are increased again, which is frictional temperature rise, the temperature difference between the inside and the outside of the tube is increased, the pressure difference is increased, when the pressure in the recoil tube is larger than the pressure outside the tube, a directional electric arc explosion effect from inside to outside is generated, the electric arc in the tube is rapidly evacuated, the cavity effect of the outer electric arc is blocked, the energy injection of the outer electric arc is blocked, the residual electric arc is sequentially subjected to lightning receiving through a lightning conductor, is guided by a next arc striking assembly 1 and then enters a next, and finally, the electric arc is simultaneously broken at a plurality of break points, the continuity of the electric arc is damaged, the extinguishing of the impact electric arc is accelerated, and the formation of a power frequency arc establishing channel is eliminated.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a single recoil arc control device of booster-type which characterized in that: including striking subassembly, recoil pipe (1) and connecing and dodging electrode (2), recoil pipe (1) sets up to hollow tubular structure, striking subassembly lid closes the top that sets up at recoil pipe (1), connect and dodge the inside bottom that electrode (2) are sealed to be set up at recoil pipe (1), meet and dodge electrode (2) and the outside earth connection contact setting.

2. The booster-type single-bounce arc extinguishing device according to claim 1, wherein: the arc striking component is arranged as a metal sealing cover, covers the top of the back flushing pipe and can be turned over.

3. The booster-type single-bounce arc extinguishing device according to claim 2, wherein: the arc striking component comprises a fixed column (3), a rotating point (4), a sealing cover (5) and a magnet (6), the fixed column (3) is arranged at the top of the recoil pipe (1), the magnet (6) is arranged on one side, opposite to the fixed column (3), of the recoil pipe (1), the rotating point (4) is arranged at the top end of the fixed column (3), and the sealing cover (5) is rotatably arranged on the rotating point (4) and is attracted to the magnet (6).

4. The booster-type single-bounce arc extinguishing device according to claim 1, wherein: the top end of the recoil pipe (1) is of a notch structure, the arc striking component covers the notch at the top of the recoil pipe (1) in an inclined mode, and one side of the arc striking component can be arranged on the notch in a lifting mode.

5. The boost-type single-bounce arc extinguishing device according to claim 4, wherein: the arc striking assembly comprises a fixing column (3), a rotating point (4) and a sealing cover (5), wherein the fixing column (3) is arranged on the higher side of an incision structure at the top end of the recoil pipe (1), the rotating point (4) is arranged on the fixing column (3), the sealing cover (5) can be arranged on the rotating point (4) in a turnover mode, the sealing cover (5) is arranged to be a metal cover, and the sealing cover is covered on the incision structure.

6. The boost-type single-bounce arc extinguishing device according to claim 5, wherein: the sealing cover (5) is of an oval metal cover structure, and the size of the oval metal cover structure is the same as the outer diameter of the notch structure at the top end of the recoil pipe (1).

7. The booster-type single-bounce arc extinguishing device according to claim 1, wherein: the arc striking component comprises a sealing cover (5) and an arc striking cover (7), the sealing cover (5) can be arranged at the top end of the recoil pipe (1) in a lifting mode, and the arc striking cover (7) is arranged at the top end of the recoil pipe (1), arranged on the edge of the sealing cover (5) and arranged without being in contact with the sealing cover (5).

8. The boost-type single-bounce arc extinguishing device according to claim 7, wherein: the sealing cover (5) is rotatably arranged at the top end of the recoil pipe (1) through a fixed column (3) and a rotating point (4), the rotating point (4) is fixed on the fixed column (3), a spring is arranged at the bottom of the other side of the sealing cover (5), one end of the spring is fixed at the top end of the recoil pipe (1), and the other end of the spring is fixed at the bottom of the sealing cover (5).

9. The boost-type single-bounce arc extinguishing device according to claim 8, wherein: the arc striking cover (7) is of a metal structure and is arranged in a funnel shape, and a water leakage hole (8) is formed in the side edge of the bottom of the arc striking cover.

10. The booster-type single-bounce arc extinguishing device according to claim 1, wherein: the lightning receiving electrode (2) is of a metal structure, the shape of the lightning receiving electrode is the same as that of a hollow pipe structure in the recoil pipe (1), and the side wall of the recoil pipe (1) is made of a high-strength high-temperature-resistant high-pressure-resistant non-conductive material.