CN112117660A - Multistage recoil arc control device and lightning rod - Google Patents

Abstract

The invention discloses a multistage recoil arc extinguishing device and a lightning rod, belonging to the technical field of lightning protection and arc extinguishing, and comprising an arc striking component, n lightning receiving components and n +1 recoil components, wherein n is a positive integer larger than or equal to 1, the n +1 recoil components are sequentially connected to form the multistage recoil component, the arc striking component is arranged at one end of the multistage recoil component, the lightning receiving components are arranged at the joint of the two recoil components, one end of a through pipe in the recoil component is sealed, and a recoil nozzle is arranged on the recoil component at the bottom of the lightning receiving component and communicated with the outside. The arc extinguishing effect of the stage recoil component is better than that of a single recoil component, and the serial connection mode of the plurality of recoil components can ensure that the leakage current allowance flowing through the lightning rod is smaller, so that the lightning rod is better in protection strength.

Description

Multistage recoil arc control device and lightning rod

Technical Field

The invention relates to the technical field of lightning protection and arc extinction, in particular to a multistage recoil arc extinction device and a lightning rod.

Background

Lightning is a gas discharge phenomenon in nature, which endangers the life safety of human beings and animals and destroys various buildings, and a protection device is needed to avoid or reduce damage caused by lightning. The lightning rod is used for protecting buildings, tall trees and the like from being struck by lightning, and has the function of attracting lightning to strike the lightning rod per se and rapidly discharging the lightning current into the ground through the grounding device. But the lightning rod still has some disadvantages.

1. The current leakage process of the lightning rod has great influence:

when thunder comes, the common lightning rod can defend the damage of lightning stroke to buildings or power transmission lines to a certain extent, and the safety of the buildings and a power system is protected. However, when a large lightning current is rapidly discharged to the ground, the lightning current will generate a large transient electromagnetic field, and the large electromagnetic field will affect the circuits of electronic equipment, communication equipment and power systems in the magnetic field, which may generate additional induced current, and if so, malfunction of the device may occur, and if so, the device may be damaged.

2. The reduction degree of the lightning overvoltage is not enough:

when an object is protected by using a common lightning rod, strong lightning current flows through the lightning rod quickly, high impulse voltage can be generated, but the reduction degree of lightning overvoltage by lightning protection is insufficient because the impulse voltage is related to the lightning current and the impulse resistance of the object to be struck, and equipment cannot be protected by the lightning rod completely. Meanwhile, in the process of discharging lightning current into the earth, electric arcs can be flashover to various nearby grounding conductors, the voltage can reach more than tens of thousands of volts, and the electric arcs still have great influence on electronic equipment and power transmission lines in buildings.

Disclosure of Invention

The recoil lightning arrester with the improved lightning protection effect is provided for overcoming the defects of the conventional lightning rod at present. The lightning rod aims to improve the existing lightning rod, and solves the problems that the current leakage allowance of lightning passing through the lightning rod is too large and the lightning stroke induction overvoltage is too high through a multi-stage recoil device.

The utility model provides a multistage recoil arc control device, includes striking subassembly, a n meet sudden strain of a muscle subassembly and a n +1 recoil subassembly, and wherein n is more than or equal to 1's positive integer, and a n +1 recoil subassembly connects gradually constitutes multistage recoil subassembly, the striking subassembly sets up the one end at multistage recoil subassembly, meets sudden strain of a muscle subassembly and sets up at two recoil subassembly junctions, and seals the one end of recoil subassembly, is provided with recoil spout and outside intercommunication on the recoil subassembly of meeting sudden strain of a muscle subassembly bottom.

Further, n +1 recoil subassembly all includes that a plurality of climbs arc limit and recoil pipe, set up to hollow structure in the middle of the recoil pipe, a plurality of climbs the outside that the arc limit set up at the recoil pipe.

Further, the mine lighting device also comprises a lightning rod, wherein the lightning rod is arranged at the other end of the multistage recoil assembly, and an arc guide ring is arranged between the arc lighting assembly and the recoil assembly.

Furthermore, n connects the sudden strain of a muscle subassembly all to set up to electrically conductive motor, electrically conductive motor upper end structure and the same of the inside hollow structure of recoil subassembly, and with the bottom of sealing the recoil subassembly, electrically conductive motor bottom structure sets up to decurrent toper structure or arc structure.

Furthermore, the arc striking assembly is arranged into a conical tube, the interior of the conical tube is arranged into a hollow structure, the top end and the bottom of the conical tube are both provided with a hollow hole structure, and the bottom of the conical tube is fixedly arranged with the arc guide ring;

the lateral wall of toper pipe has a plurality of arc chimb, a plurality of arc chimes or a plurality of plane board to constitute, and a plurality of plane board sets up to the triangle-shaped plate structure, and the slope of triangle-shaped plate sets up, and interconnect, and a plurality of arc chimb slope sets up, and an arc chimb is connected with another arc chimb another side on one side, and the salient structure of arc chimb sets up in the outside, and the slope of a plurality of arc chimb sets up, and an arc chimb is connected with another arc chimb another side on one side, and the groove structure setting of arc chimb is in the outside.

Further, the arc striking component is arranged to be an oval metal spherical shell, openings are formed in the bottom and the top of the oval metal spherical shell, a spout pipeline wall is arranged inside the oval metal spherical shell and is arranged on the side of the bottom opening and the side of the top opening, the bottom opening of the oval metal spherical shell is fixed to the electric arc guide ring, and the bottom opening and the top opening of the oval metal spherical shell are communicated with the recoil component at the joint of the electric arc guide ring to form an electric arc nozzle.

Further, the striking subassembly includes circular metal spherical shell and/or spout foot mound, circular metal spherical shell bottom and top all are provided with the trompil, and the bottom trompil of circular metal spherical shell is fixed on the electric arc guide ring or on the spout foot mound, the spout foot mound sets up to the big upper end in bottom little, and the inside hollow mound pipe, the mound pipe bottom is fixed on the electric arc guide ring, and the recoil subassembly intercommunication of spout foot mound and electric arc guide ring junction is passed through to the bottom trompil and the top trompil of circular metal spherical shell constitutes the electric arc spout.

Further, the arc striking assembly is composed of a cylindrical metal shell, the bottom of the cylindrical metal shell is fixed on the arc guide ring, a cylindrical nozzle pipeline wall is arranged inside the cylindrical metal shell and surrounds the cylindrical metal shell to form an arc nozzle, the top of the cylindrical metal shell is of a tip structure or a flat top structure, and meanwhile, other structures can be arranged, so that the arc striking assembly is within the protection range of the arc striking assembly.

A multistage recoil arc extinguishing lightning rod comprises any one of the multistage recoil arc extinguishing devices, a locking assembly and a metal ball seat, wherein the recoil arc extinguishing device is fixed on the metal ball seat through the locking assembly.

Furthermore, the multistage recoil arc extinguishing device comprises a plurality of multistage recoil arc extinguishing devices of any one of the above, and the multistage recoil arc extinguishing devices are all fixed on the metal ball seat through the lightning rod and the locking assembly.

The invention adopts the following connecting structure and installation mode: the lightning rod is provided with the recoil pipe with the skirt edge, the upper end of the recoil pipe is provided with the arc striking component, the arc striking component can use an arc striking metal rod and an arc striking metal ring and also can use a conical metal pipe, the upper end of the conical metal pipe is provided with a nozzle, the outside of the conical metal pipe is provided with a circle of metal ring, the gas of the recoil is sprayed out by the nozzle, and the recoil pipe is internally provided with a lightning receiving component to play a role in lightning striking.

The technical scheme comprises the following steps: when the device is struck by lightning, the lightning is introduced into the recoil device through the arc striking component, and because the lightning electric arc is plasma with elastic deformation, when the lightning electric arc passes through the recoil pipe, due to the limitation of the recoil pipe, the density, the speed and the temperature of the electric arc are increased when the electric arc enters the initial end of the recoil pipe, so that the pressure in the pipe is increased, and finally, the pressure explosion effect is generated, so that the electric arc is subjected to the elasticity at the bottom of the blocked recoil pipe, and the direction of the electric arc is changed by 180 degrees. Most of the electric arc rebounded back is higher in speed, density and pressure, and a cavity effect is formed at the inlet of the electric arc to act on the outer electric arc, so that partial electric arc at the port is cut off.

Because most of electric arcs are back-flushed and sprayed by the back-flushing pipe, only a small part of electric arcs flow into the ground through the lightning rod, the leakage current allowance flowing through the lightning rod is reduced, the lightning induced overvoltage is reduced, the effects of reducing loss and prolonging the service life of the lightning rod are achieved, and meanwhile, the safety of electronic equipment and an electric power system in a building is protected.

Back flushing pipe principle:

the passage of the arc into the back-flushing pipe is a narrow pipe filling passage, and various physical changes are generated in the filling process.

The arc plasma is elastically deformed. When the arc plasma enters the inlet of the back flushing pipe, the physical shape is changed firstly, a coarse arc is changed into an ultrafine arc, the radial pressure is changed into the axial pressure, and the spraying speed is accelerated during the arc back flushing due to the back flushing effect of the narrow pipe.

The arc temperature rise effect is exacerbated. After the electric arc is thinned, the cross-sectional area of the electric arc is reduced according to the formula

The arc resistance will rise substantially. Because the lightning arc often serves as a constant current source in practical experience work, according to the formula W ═ I²Xrat indicates that the total energy increases and the packing temperature in the recoil tube increases, although the impact time is only a few microseconds.

Arc radiation, convection and conduction are three ways of energy loss, and because heat cannot be released in a closed pipeline, namely an exogenous plugging environment, the arc is blocked, heat can be generated only, and heat can not be dissipated. This produces a blocking temperature rise, which causes the temperature in the tube to rise continuously.

The pressure explosion effect increases sharply. When the temperature is gradually increased, the accumulation of the electric arc is increased, the pressure explosion effect is further aggravated, and the electric arc spraying strength is larger.

Meanwhile, the creepage distance can be increased by using the back flushing pipe with the skirt edge, so that the electric arc enters the back flushing pipe and does not go outside.

By adopting the technical scheme, the invention has the following technical effects:

(1) compared with a single recoil pipe, the multistage recoil assembly has better arc extinguishing effect, and the serial connection mode of the recoil pipes can ensure that the leakage current flowing through the lightning rod is smaller and the lightning rod is better in protection strength.

(2) The current leakage allowance is reduced, and the lightning stroke induced overvoltage is reduced. The lightning rod with the recoil pipe can reduce the amount of electric arcs flowing through the lightning rod, and the recoil pipe reversely sprays most of the electric arcs, so that the lightning rod is protected, the lightning rod is prevented from bearing huge pressure, and meanwhile, the degree of lightning stroke influence on electronic equipment and an electric power system in a building is reduced.

(3) The safety capability of the device is improved, and the safety of the recoil lightning rod installed on the device is more effective, so that the destructive capability of lightning current on the protected device is weakened, and the safety effect of the protecting device is achieved.

(4) The stable operation of the power transmission line is protected, the recoil lightning rod arranged on the power transmission line tower can effectively protect the operation of the power transmission line, lightning is prevented from being suffered, the lightning shielding failure rate is reduced, and the occurrence of accidents is reduced.

(5) Several improvements in the safety of the power system, the capability, level, and reliability of the device itself, lead to an improvement in the safety of the power system, and the probability of occurrence of various short circuits and the probability of occurrence of serious accidents are greatly reduced.

(6) The cost performance of lightning protection is improved, and the lightning protection can be processed in time before malignant mutation occurs, so that damage to a lightning rod is reduced, the maintenance cost is reduced, and the protection degree of a line is improved.

Drawings

Fig. 1 is a schematic structural diagram of a multistage recoil arc extinguishing device of the invention.

Fig. 2 is another schematic structural diagram of the multistage recoil arc extinguishing device.

Fig. 3 is a schematic structural diagram of the lightning rod of the present invention.

Fig. 4 is another schematic view of the structure of the lightning rod of the invention.

FIG. 5 is a schematic view of the multi-electrode arc striking assembly of the present invention.

Fig. 6 is a schematic structural view of the arc striking assembly of the present invention as a tapered tube.

Fig. 7 is a cross-sectional view of three different configurations of the tapered tube of fig. 6.

Fig. 8 is a schematic structural view of the arc striking assembly of the present invention being a conical tube.

Fig. 9 is a structural schematic diagram of the arc striking assembly of the present invention in a pancake shape.

Fig. 10 is a schematic structural diagram of the arc striking assembly of the present invention in a ball-and-socket type.

Fig. 11 is a schematic structural view of the arc striking assembly of the present invention as a metal housing.

Fig. 12 is a schematic structural view of the arc striking assembly of the present invention in a cylindrical shape.

Fig. 13 is a schematic structural view of the arc striking assembly of the present invention in a pointed column shape.

FIG. 14 is a schematic view of a lightning receptor assembly according to the present invention.

In the figure: the device comprises a 1-arc striking component, a 2-arc guide ring, a 3-lightning receiving component, a 4-recoil nozzle, a 5-recoil component, a 6-arc climbing edge, a 7-recoil pipe, an 8-lightning rod, a 9-locking component, a 10-metal ball seat, a 1A-metal rod, a 1B-conical pipe, a 1B 1-arc convex edge, a 1B 2-arc concave edge, a 1B 3-plane plate, a 1C-conical pipe, a 1D-oval metal ball shell, a 1D 1-nozzle pipeline wall, a 1E-round metal ball shell, a 1E 1-nozzle foot pier, a 1F-hollow ball shell, a 1F 1-communicating pipe, a 1G-cylindrical metal shell and a 1G 1-cylindrical nozzle pipeline wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings by way of examples of preferred embodiments. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.

Example 1

The utility model provides a multistage recoil arc extinguishing device, as shown in figure 1, includes striking subassembly 1, n meet sudden strain of a muscle subassembly 3 and n +1 recoil subassembly 5, and wherein n is more than or equal to 1's positive integer, and n +1 recoil subassembly 5 connects gradually and constitutes multistage recoil subassembly, striking subassembly 1 sets up the one end at multistage recoil subassembly, and meet sudden strain of a muscle subassembly 3 and set up in two recoil subassembly 5 junctions, and seal the one end of recoil subassembly 5, is provided with recoil spout 4 and outside intercommunication on the recoil subassembly 5 of meeting sudden strain of a muscle subassembly 3 bottom. The multistage recoil arc extinguishing device can be arranged on any lightning rod to form the lightning rod with the multistage recoil effect.

The arc striking component 1 is used for introducing electric arcs, then the electric arcs enter the backflushing component 5, after backflushing, a part of electric arc directions are in opposite rush, wherein the backflushing component 3 plays a role in the backflushing, the bottom of each backflushing component 5 is blocked by the backflushing component 3, then the upper end of the backflushing component 5 is open, and then a good opposite rush effect is formed. The number of the recoil assemblies 5 is generally one more than that of the lightning receptor assemblies 3, the bottom of the recoil assembly 5 at the lowest is not designed with the lightning receptor assemblies 3, but can be designed according to the requirements of users, and the design at the lowest is also a structural type belonging to the application.

Example 2

N +1 individual recoil subassembly 5 all includes that a plurality of climbs arc limit 6 and recoil pipe 7, set up to hollow structure in the middle of the recoil pipe 7, a plurality of climbs the outside that arc limit 6 set up at recoil pipe 7.

The recoil pipe 7 is made of a high-strength high-temperature-resistant high-pressure-resistant non-conductive material, and the high-strength high-temperature-resistant high-pressure-resistant non-conductive material is made of any one of alloy ceramics, rare earth ceramics, graphene-ceramic composite materials, organic ceramics, synthetic silicone rubber, organic insulating materials, alloy glass, rare earth glass, graphene glass and organic glass. The material has the characteristic of high arc extinction threshold, and is made of a high-strength, high-temperature-resistant and high-pressure-resistant non-conductive material, so that the burning temperature is higher.

The radiuses of the circular arc climbing edges 6 are different and are arranged on the outer side of the recoil pipe 7 at equal intervals. The circular radius of climbing arc limit 6 all is different, generally sets up the radius of climbing arc limit 6 at both ends great relatively, because the voltage at both ends can be higher to the better creeping distance who satisfies electric arc realizes better arc extinguishing. The number of the arc climbing edges 6 is generally 5-7, and the set distance is generally 60 mm.

Example 3

In the embodiment of the invention, the mine-guiding device further comprises a mine-guiding rod 8, and the mine-guiding rod 8 is arranged at the other end of the multistage recoil assembly. The lightning rod 8 is used for discharging residual electric arcs into the ground, has no lightning guiding effect, introduces thunder and lightning into the ground and the like, and meanwhile, the lightning rod 8 also has the effect of fixing the whole multistage recoil arc extinguishing device, can be fixed on a roof, is fixed at the top end of a transformer station and the like, and is fixed at different places according to the requirements of users.

Example 4

The n lightning receiving assemblies 3 are all arranged to be conductive motors, the upper end structures of the conductive motors are the same as the hollow structures inside the backflushing assemblies 5, the upper end structures of the conductive motors are sealed at the bottoms of the backflushing assemblies 5, and the bottom end structures of the conductive motors are arranged to be downward conical structures or arc-shaped structures.

As shown in fig. 14, the lightning receptor assembly 3 is a cone-shaped structure, a semi-spherical structure, a circular truncated cone structure, or a plurality of cone-shaped structures fixed at the bottom of a circular plate, and the lightning receptor assembly 3 is made of a conductive material. The structure is arranged, so that when the electric arc impacts on the lightning receiving assembly 3, the electric arc is conveniently transferred to the back flushing pipe of the next stage, and the part of the electric arc enters the next back flushing assembly 2. The structure has the arc guide effect, so that the arc can be weakened step by step, and arc extinction is realized finally.

When the device is struck by lightning, the lightning is introduced into the recoil device through the arc striking component 1, and because the lightning electric arc is plasma with elastic deformation, when the lightning electric arc passes through the recoil pipe of the recoil component 5, due to the limitation of the recoil pipe, the density, the speed and the temperature of the electric arc are increased when the electric arc enters the initial end of the recoil pipe, so that the pressure in the pipe is increased, and finally, a pressure explosion effect is generated, so that the electric arc is subjected to elasticity at the bottom of the blocked recoil pipe, and the direction of the electric arc is changed by 180 degrees. Most of the electric arc rebounded back is higher in speed, density and pressure, and a cavity effect is formed at the inlet of the electric arc to act on the outer electric arc, so that partial electric arc at the port is cut off.

Example 5

As shown in fig. 5, the arc striking assembly 1 is composed of one or more metal rods 1A, and the metal rods 1A are fixedly disposed on the arc guide ring 11. The metal rods 1A are uniformly arranged on the arc guide ring 11, and the metal rods 1A are of a sharp-pointed metal rod structure. The electric arc is transmitted to the electric arc guide ring 2 through the metal rod 1A and then recoiled through the recoiling component 5, so that the electric arc forms the counter-recoil and mutual weakening effect.

Example 6

As shown in fig. 6-7, the arc striking assembly 1 is a tapered tube 1B, the tapered tube 1B is provided with a hollow structure inside, the top end and the bottom of the tapered tube 1B are both provided with a hollow structure, and the bottom of the tapered tube 1B is fixedly arranged with the arc guide ring 11. The side wall of the conical pipe 1B is provided with a plurality of arc convex edges 1B1, a plurality of arc concave edges 1B2 or a plurality of plane plates 1B3, the number of the plane plates 1B3 is not fixed, the setting is carried out according to the requirements of users, and the number of the plane plates 1B3 is generally 3-8. A plurality of flat panel 1B3 sets up to the triangle-shaped plate structure, the slope of triangle-shaped plate sets up, and interconnect, the slope of a plurality of arc chimb 1B1 sets up, an arc chimb 1B1 is connected on one side with another arc chimb 1B1 another side, the protruding structure of arc chimb 1B1 sets up in the outside, the slope of a plurality of arc chime 1B2 sets up, an arc chime 1B2 is connected on one side with another arc chime 1B2 another side, the groove structure of arc chime 1B2 sets up in the outside. Through setting up inside and outside arc structure to the area on increase surface that can be great, a large amount of opposite sex charges of gathering (positive ion) have powerful coulomb's power to electric charge (anion) on the thundercloud, can stop on the surface more steadily, and the lightning-induced effect is obvious. And after the electric arc is recoiled, a gathering effect pair is carried out to reverse, and then a good recoiling effect is formed with the forward electric arc.

Example 7

As shown in fig. 8, the arc striking assembly 1 is configured as a conical tube 1C, the inner portion of the conical tube 1C is configured as a hollow structure, the upper end and the lower end of the conical tube 1C are configured as an open structure, and the bottom of the conical tube 1C is fixed on the arc guide ring 2. The outside of the conical pipe 1C is arranged to be a smooth structure, so that the conical pipe is very convenient to process, can be produced in batches quickly, and has the characteristic of simple processing. Meanwhile, the conical tube 1C is a metal conical tube, can diffuse from one point during arc striking, then is conducted to the arc guide ring 2, and then is transmitted to the recoil assembly 5 for recoil.

Example 8

As shown in fig. 9, the arc striking component 1 is set to be an elliptical metal spherical shell 1D, the bottom and the top of the elliptical metal spherical shell 1D are both provided with openings, the inside of the elliptical metal spherical shell 1D is provided with a spout pipeline wall 1D1, the spout pipeline wall 1D1 is arranged at the side of the bottom opening and the top opening, the bottom opening of the elliptical metal spherical shell 1D is fixed on the arc guide ring 2, and the bottom opening and the top opening of the elliptical metal spherical shell 1D are both communicated with the recoil component 5 at the joint of the arc guide ring 11 to form an arc spout. The oval metal spherical shell 1D is externally arranged to be oval, and then the positions of the inner holes are provided with the spout pipeline wall 1D1, so that an up-and-down convection spout is formed.

Example 9

As shown in fig. 10, the arc striking assembly 1 includes a circular metal spherical shell 1E and/or a spout pier 1E1, the bottom and the top of the circular metal spherical shell 1E are both provided with openings, the bottom opening of the circular metal spherical shell 1E is fixed on the arc guide ring 11 or the spout pier 1E1, the spout pier 1E1 is provided with a pier tube with a large bottom and a small upper end and a hollow interior, the bottom of the pier tube is fixed on the arc guide ring 2, and the bottom opening and the top opening of the circular metal spherical shell 1E are communicated with the recoil assembly 5 at the connection position of the arc guide ring 2 through the spout pier 1E1 to form an arc spout. The spout footer 1E1 is typically made of a non-metallic insulating material and functions as the spout pipe.

Example 10

As shown in fig. 11, the arc striking assembly 1 includes a hollow ball housing 1F and a communication pipe 1F1, the bottom and the top of the hollow ball housing 1F are both provided with an opening, the bottom opening of the hollow ball housing 1F is fixed at the top of the communication pipe 1F1, the bottom end of the communication pipe 1F1 is fixed on the arc guide ring 2, and the bottom opening and the top opening of the hollow ball housing (1F) are communicated with the recoil assembly 5 at the connection position of the arc guide ring 2 through the communication pipe 1F1, so as to form an arc spout. The communicating pipe 1F1 serves as a flushing passage for the recoil gas, and then is ejected through the bottom opening and the top opening of the hollow ball housing 1F. The arc striking assemblies 1 of the present application all use a metal structure. The metal spherical shell is arranged outside and connected with the backflushing pipe through a metal ring, the wall of the pipeline of the nozzle is made of insulating materials, and backflushing gas is discharged through the pipeline. On the basis of the arc striking assembly, the metal shell in the arc striking assembly is combined by a conical structure and a spherical structure.

Example 11

As shown in fig. 12 to 13, the arc striking assembly 1 is composed of a cylindrical metal shell 1G, the bottom of the cylindrical metal shell 1G is fixed on the arc guide ring 11, a cylindrical spout pipe wall 1G1 is provided inside the cylindrical metal shell 1G, a cylindrical spout pipe wall 1G1 surrounds inside the cylindrical metal shell 1G to form an arc spout, and the top of the cylindrical metal shell 1G is provided with a tip structure. The outer shell of the cylindrical metal shell 1G is still made of metal substances, the wall of a pipeline of the nozzle is made of insulating materials, and backflush gas is discharged through the pipeline. The column shape can be cylindrical or column-shaped. A pointed-end column type structure is adopted. Referring to fig. 13, the pillar shape may be a cylinder shape or a pillar shape, and has a tip structure.

A multistage recoil arc extinguishing lightning rod, as shown in fig. 3 to 4, comprising a multistage recoil arc extinguishing device according to any one of the above embodiments 1 to 11, a locking assembly 9 and a metal ball seat 10, wherein the recoil arc extinguishing device is fixed on the metal ball seat 10 through the locking assembly 9. The multistage recoil arc extinguishing device can also comprise a plurality of multistage recoil arc extinguishing devices in any one of embodiments 1 to 11, and the multistage recoil arc extinguishing devices are all fixed on the metal ball seat 10 through the lightning rod 8 and the locking assembly 9. Fig. 3 is an upper structure of a kick section with a screw thread at an upper end of a ball-shaped lightning rod, and fig. 4 is an upper structure of a kick section with a screw thread at an upper end of a multi-rod type lightning rod. The different arc striking components and different combination modes can be arranged on the lightning rod and are also suitable for the spherical lightning rod and the multi-rod type lightning rod.

In the present application, the outer arc may be defined to have a velocity v0 at the inlet, a pressure p0, a density p0, 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.

Connection structure and mounting means: the lightning rod is provided with a multistage recoil device with a skirt edge, the multistage recoil device is formed by serially connecting and combining a plurality of recoil pipes, and the recoil pipes are semi-closed pipe fittings which are hollow inside and have one open end and the other closed end. The upper end of the recoil pipe is connected with an arc striking component, and the arc striking component can use an arc striking metal rod or an arc striking metal ring, and the like. The lightning receptor component with a cone structure is used at the closed end of the recoil pipe and is made of a conductive material. The second-stage recoil pipe and the recoil pipes behind the second-stage recoil pipe are provided with inclined side recoil pipe nozzles, and recoil gas is sprayed out. The pipe wall of the recoil pipe is made of a high-strength high-temperature-resistant high-pressure-resistant non-conductive material, and the pipe wall of the recoil pipe is of a solid structure. The outermost skirt of the multistage recoil assembly can increase the creepage distance. The lower end of the multi-stage recoil device is connected with the upper end of the lightning rod.

The specific process of backflushing is as follows:

firstly, the multistage recoil assembly is connected with an arc striking assembly, so that a lightning arc can better enter a recoil pipe. Installing a lightning receiving assembly at one port of a backflushing assembly of the multistage backflushing assembly for sealing, so that the backflushing assembly forms a semi-closed pipe fitting;

step two, when the electric arc flashover occurs, the outer electric arc is introduced into the back-flushing component under the coulomb force action of the lightning receiving component;

thirdly, the electric arc entering the interior of the backflushing assembly is called an inlet electric arc (the direction of the electric arc is a positive direction), the diameter of an arc column of the inlet electric arc is limited by a pipe wall in the backflushing assembly and is perfused by a narrow pipe, so that the conductive cross-sectional area of the whole electric arc is reduced, the density of the electric arc is increased, the temperature of the center of the electric arc is increased, the speed is increased, and the pressure in the backflushing assembly; the inlet electric arc rapidly enters the backflushing assembly, is radially thinned and generates elastic force with larger axial force, and rushes to the lightning receiving assembly to generate elastic collision, so that the direction of the electric arc is converted by 180 degrees, an outlet electric arc (the direction of the electric arc is a negative direction) is formed, and an outlet path is rushed out from an inlet of a perfusion tubule in the backflushing assembly and leaves the backflushing assembly;

fourthly, in the recoil assembly, pressure superposition, temperature superposition and density superposition effects formed by the inlet arc and the outlet arc which have opposite movement directions are used for multiplying the pressure in the recoil assembly at the highest speed; finally, the outer electric arc and the electric arc in the backflushing assembly form internal and external pressure difference, temperature difference, density difference and speed difference, so that the inner electric arc is flushed out of the backflushing assembly under the backflushing action, the energy in the backflushing assembly is weakened, the entry of the electric arc at an inlet is blocked, an electric arc large-scale fracture is formed at the inlet of the backflushing assembly, the continuity of the electric arc is damaged, and the extinguishing of the electric arc is accelerated; the outlet electric arc after backflushing acts on the outer electric arc at the inlet of the backflushing component to form a cavity effect, so that the interception of the outer electric arc is accelerated;

and step five, the energy of the electric arc is greatly reduced after the electric arc is acted by the first-stage recoil pipe, the residual electric arc enters the second-stage recoil pipe through the lightning receiving assembly, the electric arc energy is weakened through the recoil action again, then the processes are sequentially carried out, and the residual electric arc is conducted downwards along the lightning rod and flows into the ground. In the whole process, the device plays a role in reducing the leakage current allowance flowing through the lightning rod, reducing the lightning induced overvoltage, reducing the loss of the lightning rod and prolonging the service life of the lightning rod. Meanwhile, the safety of electronic equipment and a power system in the building is protected.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.

Claims (10)

1. The utility model provides a multistage recoil arc control device, its characterized in that, dodges subassembly (3) and n +1 recoil subassembly (5) including striking subassembly (1), n, wherein n is more than or equal to 1 positive integer, and n +1 recoil subassembly (5) connect gradually and constitute multistage recoil subassembly, striking subassembly (1) sets up the one end at multistage recoil subassembly, and the subassembly (3) that dodges sets up in two recoil subassembly (5) junctions, and seals the one end of the inside siphunculus of recoil subassembly (5), connects to be provided with recoil spout (4) and outside intercommunication on the recoil subassembly (5) of dodging subassembly (3) bottom.

2. The multi-stage recoil arc extinguishing device according to claim 1, wherein: n +1 individual recoil subassembly (5) all include that a plurality of climbs arc limit (6) and recoil pipe (7), set up to hollow structure in the middle of recoil pipe (7), a plurality of climbs the outside that arc limit (6) set up at recoil pipe (7).

3. The multi-stage recoil arc extinguishing device according to claim 1, wherein: the mine-lighting device is characterized by further comprising a lightning-striking rod (8), wherein the lightning-striking rod (8) is arranged at the other end of the multistage recoil assembly, and an electric arc guide ring (2) is arranged between the arc-striking assembly (1) and the recoil assembly (5).

4. The multi-stage recoil arc extinguishing device according to claim 1, wherein: the n lightning receiving assemblies (3) are all arranged to be conductive motors, the upper end structures of the conductive motors are the same as the hollow structures in the backflushing assemblies (5), the upper end structures of the conductive motors are sealed at the bottoms of the backflushing assemblies (5), and the bottom end structures of the conductive motors are arranged to be downward conical structures or arc-shaped structures.

5. The multi-stage recoil arc extinguishing device according to claim 1, wherein: the arc striking component (1) is arranged to be a conical tube (1B), the interior of the conical tube (1B) is arranged to be a hollow structure, the top end and the bottom of the conical tube (1B) are both provided with a hollow hole structure, and the bottom of the conical tube (1B) is fixedly arranged with the arc guide ring (2);

the lateral wall of conical duct (1B) has a plurality of arc chimb (1B1), a plurality of arc chime (1B2) or a plurality of plane board (1B3) are constituteed, a plurality of plane board (1B3) set up to the triangle-shaped plate structure, the slope of triangle-shaped plate sets up, and interconnect, a plurality of arc chimb (1B1) slope sets up, an arc chimb (1B1) one side is connected with another arc chimb (1B1) another side, the bulge structure setting of arc chimb (1B1) is in the outside, a plurality of arc chimb (1B2) slope sets up, one side of arc chimb (1B2) is connected with another arc chimb (1B2) another side, the groove structure setting of arc chimb (1B2) is in the outside.

6. The multi-stage recoil arc extinguishing device according to claim 1, wherein: the arc striking component (1) is arranged to be an oval metal spherical shell (1D), the bottom and the top of the oval metal spherical shell (1D) are provided with open holes, a spout pipeline wall (1D1) is arranged inside the oval metal spherical shell (1D), the spout pipeline wall (1D1) is arranged on the side of the open holes at the bottom and the top, the open holes at the bottom of the oval metal spherical shell (1D) are fixed on an arc guide ring (2), and the open holes at the bottom and the top of the oval metal spherical shell (1D) are communicated with a recoil component (5) at the joint of the arc guide ring (2) to form an arc spout.

7. The multi-stage recoil arc extinguishing device according to claim 1, wherein: the arc striking component (1) comprises a circular metal spherical shell (1E) and/or a nozzle foot pier (1E 1), the bottom and the top of the circular metal spherical shell (1E) are provided with openings, the bottom opening of the circular metal spherical shell (1E) is fixed on an arc guide ring (2) or the nozzle foot pier (1E 1), the nozzle foot pier (1E 1) is arranged to be small in the large upper end of the bottom, a hollow pier tube is arranged inside the bottom of the pier tube, the bottom of the pier tube is fixed on the arc guide ring (2), and the bottom opening and the top opening of the circular metal spherical shell (1E) are communicated with a recoil component (5) at the joint of the nozzle foot pier (1E 1) and the arc guide ring (2) to form an arc nozzle.

8. The multi-stage recoil arc extinguishing device according to claim 1, wherein: the arc striking component (1) is composed of a cylindrical metal shell (1G), the bottom of the cylindrical metal shell (1G) is fixed on an arc guide ring (2), a cylindrical nozzle pipeline wall (1G1) is arranged inside the cylindrical metal shell (1G), the cylindrical nozzle pipeline wall (1G1) surrounds an arc nozzle formed inside the cylindrical metal shell (1G), and the top of the cylindrical metal shell (1G) is arranged to be of a tip structure or a plane structure.

9. The utility model provides a multistage recoil arc extinguishing lightning rod which characterized in that: comprising a multistage recoil arc extinguishing device according to any one of claims 1 to 8, a locking assembly (9) and a metal ball seat (10), the recoil arc extinguishing device being fixed to the metal ball seat (10) by the locking assembly (9).

10. The multi-stage recoil arc extinguishing lightning rod of claim 9, characterized in that: a multistage recoil arc extinguishing device comprising a plurality of multistage recoil arc extinguishing devices according to any one of claims 1 to 8, each of the plurality of multistage recoil arc extinguishing devices being fixed to a metal ball seat (10) by a lightning rod (8) and a locking assembly (9).

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