CN210326481U - Multistage horn type recoil compression arc extinguishing lightning protection device - Google Patents

Abstract

The utility model discloses a multistage horn type recoil compression arc extinguishing lightning protection device, the interior of the device main body is hollow, the device main body is gradually enlarged from top to bottom and is horn-shaped, an arc extinguishing path consisting of arc extinguishing pipelines is arranged in the upper half space, an arc guiding ball I which is in close contact with the inner side wall of the device main body is arranged in the lower half space, an arc guiding ball III is arranged in the arc extinguishing pipeline, the end parts of every two adjacent arc extinguishing pipeline are connected through a conductive connecting piece, and the tail end of the last section of arc extinguishing pipeline is electrically connected with the arc guiding ball I positioned at the top; the side wall of the device main body is provided with a compressed air flow jet passage and a recoil jet passage, and the outer surface of the device main body is provided with a compressed air flow jet orifice and a recoil jet orifice. The utility model discloses a device main part of loudspeaker column structure can carry out the throat better and fill the effect to electric arc, produces bigger density difference, temperature difference, produces stronger recoil effect to the electric arc that energy is big, reduces electric arc energy by a wide margin, is favorable to extinguishing electric arc.

Description

Multistage horn type recoil compression arc extinguishing lightning protection device

Technical Field

The utility model belongs to the technical field of the electric power gold utensil that power transmission and distribution overhead line was used, a multistage horn type recoil compression arc extinguishing lightning protection device is related to.

Background

The distribution of electric energy and load center in China is not balanced, and mainly takes coal power generation as a main factor. Most of coal resources are concentrated in northwest areas, the developable hydraulic resources are mainly concentrated in western and middle areas, and the load center of China is concentrated in coastal areas, Jingjin Tang and middle developed areas of east. The problem of electric power of a load center in China is solved, and a trans-regional, large-capacity and long-distance energy transmission channel is inevitably constructed while hydraulic power and thermal power generation are vigorously developed.

With the continuous rise of the voltage grade of the transmission line, the country builds up 'eight-phase-ten-straight' ultrahigh voltage engineering cumulatively, forms a transmission line of more than 110 ten thousand kilometers, has nearly 5000 ten thousand base towers, and according to statistics, the power grid lightning damage risk is mainly concentrated on the transmission line, and the lightning damage is still an important factor influencing the safety, stability and reliability of the transmission network. The existing lightning protection system is mainly in a blocking type lightning protection mode, and the main measures are to erect a lightning conductor and a coupling ground wire, reduce tower grounding resistance, enhance line insulation, install a line lightning arrester and the like. The existing dredging type lightning protection mode is mainly characterized in that parallel protection gaps are arranged at two ends of an insulator string, although the lightning protection mode is simple in structure and convenient to install, short-circuit current continuously flows into a system due to the fact that an arc extinguishing function module is not arranged, the short-circuit current can only be cut off by means of a breaker, the trip rate is changed into the accident rate, and huge safety accidents of a circuit are easily caused. Meanwhile, due to the ablation effect of the short-circuit current, the parallel protection gap insulation matching fails, and the application function is lost.

For example, 2015100691235 discloses a countable arc-cutting lightning protection device, which has a good lightning protection effect, but still has some disadvantages, only in a longitudinal arc-blowing mode, and when the arc is strong, the arc is not easy to blow out.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, provide one kind and can carry out multistage recoil effect to the electric arc that the energy is big, can cut electric arc better, reduce electric arc energy by a wide margin, be favorable to extinguishing the multistage horn type recoil compression arc extinguishing lightning protection device of electric arc.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a multi-stage horn-shaped recoil compression arc extinguishing lightning protection device comprises a device main body; the device is characterized in that the device main body is hollow, the inner diameter and the outer diameter of the device main body are gradually increased from top to bottom, the device main body is in a horn shape, a plurality of arc extinguishing paths formed by arc extinguishing pipelines which are obliquely arranged from top to bottom are arranged in the upper half space, and a plurality of arc guiding balls I which are tightly contacted with the inner side wall of the device main body are arranged in the lower half space from top to bottom; an arc guide ball III is arranged in the arc extinguishing pipeline; the end parts of every two adjacent arc extinguishing pipelines are connected through a conductive connecting piece, and the tail end of the last section of arc extinguishing pipeline is electrically connected with an arc guiding ball I positioned at the top; a compressed air flow jet channel is arranged on the side wall of the device body corresponding to the end part of the arc extinguishing pipeline, and a compressed air flow jet orifice is correspondingly arranged on the outer surface of the device body; a backflushing jet channel is further arranged on the side wall of the device body between the two adjacent arc guide balls I, and backflushing jet orifices are correspondingly arranged on the outer surface of the device body, so that the lower half part of the device body forms a plurality of backflushing pipes in semi-closed space.

As a further technical improvement, a metal ring and a small platform are also arranged in the device main body; the small platform is arranged above the backflushing jet orifice; the metal ring is horn-shaped and is arranged on the small platform, and the outer surface of the metal ring is tightly attached to the inner side wall surface of the device main body. The backflushing jet orifice comprises a backflushing jet passage and a bottom backflushing jet orifice at the opening at the bottom of the device main body; the outer diameter of the metal ring is tightly attached to the inner diameter of the device main body, and the position of the metal ring is fixed through the small platform, so that the metal ring is prevented from shifting in the backflushing process; a plurality of metal rings can be added in the side-level recoil pipe (namely the device main body section forming the semi-closed space between the two arc guide balls I), wherein one metal ring is arranged above the recoil injection channel, and one metal ring is added in the bottom recoil injection port at the bottom of the device main body; the metal conductivity of the metal ring is utilized to ensure that the electric arc can smoothly enter the device main body, so that the back-flushing function is realized, and meanwhile, the metal ring can also play a role in protecting the outlet of the device main body due to the large stress at the outlet of the device main body; not only can design the becket at device main part bottom exit, also can design a becket at whole device main part interval certain distance and guarantee that the electric arc passageway is controlled at the track of settlement.

As a further technical improvement, the recoil injection channel is obliquely arranged.

As a further technical improvement, the conductive connecting piece is a wire or a metal sheet or a three-way pipe.

As a further technical improvement, two arc guiding balls II are arranged in the three-way pipe; an air gap is arranged between the two arc-shaped balls II, and the length of the air gap is just the diameter of a radial pipe of the three-way pipe. The arc guiding ball II is of a ball structure, after electric arc enters the three-way pipe, the middle jet orifice of the three-way pipe forms jet air flow to act on the electric arc, and transverse blowing is achieved.

As a further technical improvement, the radial pipe orifice of the three-way pipe is tightly attached to the inner side wall surface of the device main body, and a corresponding compressed air flow injection channel is arranged on the side wall of the device main body.

As a further technical improvement, the arc guide ball III is arranged in the middle of the arc extinguishing pipeline.

As a further technical improvement, the arc guiding ball I, the arc guiding ball II and the arc guiding ball III are made of graphite or metal materials.

As a further technical improvement, a plurality of skirt edges are arranged on the outer surface of the device main body; the diameter of the skirt edge is gradually increased from top to bottom on the outer surface of the device body.

As a further technical improvement, the lengths of the arc extinguishing pipelines arranged in the upper half space of the device main body are gradually increased from top to bottom, and the lengths of the arc extinguishing pipelines are larger than the length of the inner diameter of the device main body at the corresponding position.

The utility model discloses a theory of operation:

the electric arc is a plasma with elastic deformation, after the electric arc enters a recoil pipe (a device main body stage of a semi-closed space is formed after an arc guide ball I is embedded), due to the limitation of a recoil pipe wall, the density, the speed and the temperature of the electric arc are increased in a step mode when the electric arc enters the initial end of the recoil pipe, so that the pressure in the pipe is increased in a step mode, finally, a pressure explosion effect is generated, the electric arc impacts the arc guide ball I at the bottom of the recoil pipe, the electric arc is subjected to reverse elasticity at the bottom of the blocked recoil pipe, the advancing direction of most of the electric arc is changed by 180 degrees, a small part of the electric arc enters an arc extinguishing path formed by arc extinguishing pipelines due to coulomb force, and compressed air flow jet. The recoil arc is higher in speed, density and pressure, and the cavity effect acts on the outer arc at the inlet, so that the arc at the port of the recoil pipe is cut off.

The back flushing pipe in the utility model is a narrow pipe filling channel, which is the only channel for the electric arc entering device. A variety of physical changes occur during perfusion.

1. 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.

2. 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. Since the lightning arc is often used as a constant current source in practical empirical work, it can be known from the formula W ═ I2 × R Δ t that although the impact time is only a few microseconds, the overall energy is enhanced, and the convergence temperature in the recoil pipe is increased.

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, heat dissipation cannot be realized, so that blocking temperature rise can be generated, and the temperature in the pipeline is continuously increased.

3. 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.

The arc extinguishing pipeline is inclined in the device body, so that the phenomenon that the end parts of the upper and lower adjacent arc extinguishing pipelines are too close to each other to cause air breakdown and arc striking can be avoided, and the electric arc cannot be effectively blown out; two ends of the arc extinguishing pipeline are respectively contacted with two sides of the inner wall of the device main body; an opening at the bottom of the device main body is a bottom backflushing jet orifice; the top of the device main body is set to be in a closed state;

the main body of the device is of a horn-shaped structure; the arc guiding balls I are of a spherical structure and are arranged in the lower half space in the device main body at equal intervals; the arc guide ball I and the device main body are tightly embedded, the upper half space of the device main body forms a compression arc extinguishing pipeline, a section of the device main body at the lower part of the arc guide ball I at the bottom end forms a horn recoil pipe, and the horn recoil pipe is a semi-closed space; the space formed by every two adjacent arc guiding balls I and the device main body forms a side-level back flushing pipe, and each side-level back flushing pipe and the corresponding compressed air flow injection channel form a semi-closed space; the arc guide ball III is of a spherical structure and is embedded in the arc extinguishing pipeline, so that the arc extinguishing pipeline is divided into two semi-closed spaces by the arc guide ball III;

the device body is made of high-strength high-density high-temperature-resistant materials, such as alloy ceramics, rare earth ceramics, graphene-ceramic composite materials, organic ceramics, synthetic silicone rubber, organic insulating materials, alloy glass, rare earth glass, graphene glass, organic glass and other insulating materials.

When in use, the compression arc-extinguishing lightning protection device is arranged on the insulator string on one side of the low-voltage end, and the head end of the first section of arc-extinguishing pipeline is electrically connected with the insulator string on one side of the low-voltage end; the position of the compression arc-extinguishing lightning-protection device corresponds to the lower electrode on one side of the high-voltage end, a flashover air channel is arranged in the middle, through insulation matching, lightning overvoltage generated when a tower or a lightning conductor is struck by lightning preferentially punctures the parallel channel to protect an insulator string, the formed electric arc enters the recoil type compression arc-extinguishing lightning-protection device, and the electric arc firstly enters a horn recoil pipe;

the diameter of the device main body is smaller than the diameter of an electric arc, when the electric arc enters the device main body, the density of the electric arc in the device main body is increased due to the perfusion effect of the plasma narrow pipe, the temperature in the device main body pipe rises instantly due to the sealing performance of the device main body, the density difference and the temperature difference between the inside and the outside are formed and are limited by the inner wall of the device main body pipe, when the electric arc enters the initial end of the recoil pipe, the density, the speed and the temperature are increased in a step-like mode, the pressure in the pipe is increased in a step-like mode, the pressure explosion effect is finally generated, the electric arc is subjected to reverse elasticity at the bottom of the blocked recoil pipe, and the. The rebounding arc acts on the outer arc at the inlet due to the greater velocity, density, pressure, cavity effect, causing the arc at the port to break. Because the back flushing pipe contains a small amount of air, the small amount of air expands to form reverse jet airflow and acts on the electric arc, the generation of partial electric arc can be effectively restrained to a certain extent, and the cavity effect of longitudinal blowing airflow is formed in the center of the electric arc shaft to weaken the electric arc energy; the larger the energy of the electric arc entering the back flushing pipe is, the larger the filling effect of the narrow pipe of the back flushing pipe is, the larger the formed density difference and temperature difference are, so that the back flushing capacity is stronger, and even the electric arc is extinguished;

due to the conductivity of the multistage arc guide ball I, the electric arc enters the side-stage back-flushing pipe along the same current to repeat multistage back-flushing action, the electric arc is subjected to elasticity, the moving direction of the electric arc is changed, the electric arc is sprayed out from the side nozzle, and part of generated side jet air flow acts on the electric arc to realize transverse multistage truncation; the larger the arc energy is, the larger the formed density difference and temperature difference are, so that the recoil capacity is stronger; the electric arc is acted by a cavity effect in the horn recoil pipe, the energy of the electric arc is weakened, the energy of the electric arc entering the side-level recoil pipe is reduced, and the electric arc forms a plurality of breakpoints due to the transverse cutoff action of the side-level recoil pipe, so that the extinguishing of the electric arc is accelerated;

after the electric arc is subjected to the recoil action, the energy is greatly reduced, the residual electric arc enters an arc extinguishing pipeline at the upper part through the arc striking of the arc guiding ball I at the top, multi-point injection longitudinal blowing is formed through internal and external temperature difference, density difference and pressure difference due to the compression action, the electric arc is divided into a plurality of breakpoints, the electric arc cutting action is realized, the electric arc is finally extinguished, the electric arc is completely extinguished before the breaker is disconnected, and the tripping of the breaker is avoided while the insulator string is protected.

Compared with the structure and the principle of the prior art "angle lightning arrester (patent application number is CN 200810178607.3)", the structure and the principle of the present patent are different as follows:

1) the arc extinction has no time lag effect. In the arcing horn system, arc jet gas is discharged by lightning flashover, and this process requires a conductive component such as a metal component generated by melting and vaporization or an ion component in a plasmatized gas, and the component is in a floating state in the air, thereby reducing the insulating ability in the air and easily causing arc displacement, and the arc jet gas is discharged at the arc displacement position to interrupt the arc. Obviously, in the process of arc flashover, melting and vaporizing of the conductive material and ejection of arc jet, a time lag effect exists, namely, the energy of the arc jet ejected by the arcing horn device is smaller than that of the lightning flashover arc. The narrow tube perfusion effect provided by the patent makes full use of the elastic deformation of the arc plasma, the physical shape of the arc plasma is changed when the arc plasma enters the inlet of the recoil pipe, the coarse arc is changed into the ultrafine arc, the radial pressure is converted into the axial pressure, and the ejection speed is accelerated during the electric arc recoil due to the narrow tube recoil effect.

2) The arc extinction threshold is high. Because the arc extinguishing cylinder and the gas generating device of the arcing horn device are made of polyamide resin (also named nylon), the temperature of the arc extinguishing cylinder and the gas generating device can be about 500 ℃, and the value of the arc extinguishing cylinder and the gas generating device is far less than the arc burning temperature (the maximum value is 3726.85 ℃). Therefore, the arc extinguishing cylinder and the gas generating device are very susceptible to high temperature and finally burst. The patent proposes that the material is made of non-conductive materials with high strength, high temperature resistance and high pressure resistance, such as 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, and is combined with novel materials

3) No high-temperature baking gas generation mode exists. The arcing horn acts on the arc by spraying arc jet and blows the arc in the gap. The sprayed arc jet needs high-temperature baking to generate gas, which seriously results in loss of gas generating materials and obviously reduces the service life of the device. The patent proposes the plasma narrow tube perfusion effect: the radial displacement of the electric arc entering the recoil pipe is changed into axial expansion by utilizing the fluidity of the electric arc plasma; the bottom of the back punch pipe is subjected to geometric elastic deformation, and pressure superposition, temperature superposition and density superposition effects formed by the incoming flow electric arc and the outgoing flow electric arc enable the pressure in the back punch block to be multiplied at the highest speed, the follow-up energy of the electric arc is damaged, and the continuity of the electric arc is blocked. Therefore, a high-temperature baking gas generation mode does not exist, the loss of the patent material is ensured, and the service life is long.

Compared with the prior art, the utility model discloses the beneficial effect who possesses:

1. the utility model discloses a loudspeaker recoil pipe is as the one-level explosion chamber, can step to extrude electric arc, and the pressure of production explodes the effect more obvious, and the electric arc that can be big at first through the recoil effect, weakens its energy, gets into side recoil pipe and arc extinguishing pipeline again, can effectively protect the arc extinguishing pipeline, prolongs the life of arc extinguishing pipeline.

2. The utility model discloses a carry out multistage recoil to electric arc in the side level recoil pipe, can make electric arc form the multiple break point, reduce the electric arc energy by a wide margin, reentrant arc extinguishing pipeline.

3. The utility model discloses a device main part of loudspeaker column structure can produce density difference, temperature difference better, and the recoil effect of formation is more strong.

4. The utility model firstly carries out the longitudinal cutting action on the electric arc through the horn recoil pipe; and then the lateral recoil pipe performs a transverse cutting action on the electric arc, and the longitudinal cutting and the transverse cutting are combined, so that the electric arc can be better cut off.

5. The utility model discloses well device main part and arc extinguishing pipeline all utilize thunder and lightning self energy to carry out the arc extinguishing, do not rely on the power frequency energy.

6. The utility model discloses utilize the electric current fuel factor to change the inside and outside temperature difference of device main part to produce the air pressure difference and blow out electric arc, avoid using external gas production material, be favorable to long-term used repeatedly.

Drawings

Fig. 1 is an installation schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the external structure of the present invention.

Fig. 3 is a schematic view of the internal structure of embodiment 1 of the present invention.

Fig. 4 is a cross-sectional view of the arc extinguishing duct of the present invention.

Fig. 5 is a schematic view of the internal structure of embodiment 2 of the present invention.

Fig. 6 is a cross-sectional view of the middle three-way pipe of the present invention.

Fig. 7 is a schematic structural diagram of embodiment 3 of the present invention.

Fig. 8 is a schematic structural view of embodiment 4 of the present invention.

Reference numerals: 1-low-voltage end, 2-insulator string, 3-high-voltage end, 4-lower electrode, 5-compressed air flow jet orifice, 6-recoil jet channel, 7-bottom recoil jet orifice, 8-arc guide ball I, 9-skirt edge, 10-arc extinguishing pipeline, 11-arc guide ball III, 12-jet channel, 13-three-way pipe, 14-arc guide ball II, 15-metal ring, 16-small platform and 17-device main body.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1:

a multi-stage horn-shaped recoil compression arc extinguishing lightning protection device comprises a device main body 17; the outer surface of the device main body 17 is provided with a plurality of skirt edges 9; the device main body 17 is hollow, the inner diameter and the outer diameter of the device main body 17 are gradually increased from top to bottom, so that the device main body 17 is in a horn shape, a plurality of arc extinguishing paths consisting of arc extinguishing pipelines 10 which are obliquely arranged from top to bottom are arranged in the upper half space, and a plurality of arc guiding balls I8 which are tightly contacted with the inner side wall of the device main body are arranged in the lower half space from top to bottom; an arc guide ball III 11 is arranged in the arc extinguishing pipeline 10; the end parts of every two adjacent arc extinguishing pipelines are connected through a conductive connecting piece, and the tail end of the last section of arc extinguishing pipeline is electrically connected with an arc guiding ball I positioned at the top; a compressed air jet channel 12 is arranged on the side wall of the device body corresponding to the end part of the arc extinguishing pipeline 10, and a compressed air jet orifice 5 is correspondingly arranged on the outer surface of the device body; a backflushing jet channel 6 is also arranged on the side wall of the device body between the two adjacent arc guide balls I, and backflushing jet orifices are correspondingly arranged on the outer surface of the device body, so that the lower half part of the device body forms a plurality of backflushing pipes in semi-closed space.

The recoil injection channel 6 is obliquely arranged. The arc guide ball III 11 is arranged in the middle of the arc extinguishing pipeline 10. The conductive connecting piece is a metal sheet. The diameter of the skirt 9 is gradually increased from top to bottom on the outer surface of the device body 17. The length of the arc extinguishing duct 10 arranged in the upper half space of the apparatus main body 17 is gradually increased from top to bottom, and the length of the arc extinguishing duct 10 is greater than the length of the inner diameter of the apparatus main body at the corresponding position.

The working principle of this embodiment is as follows:

the arc extinguishing pipes 10 are inclined in the device main body 17, so that the phenomenon that air breaks through to strike an arc due to the fact that the end parts of the upper and lower adjacent arc extinguishing pipes 10 are close to each other, and the arc cannot be effectively blown out can be avoided; two ends of the arc extinguishing pipeline 10 are respectively contacted with two sides of the inner wall of the device main body 17; the opening at the bottom of the device main body 17 is a bottom backflushing jet orifice 7; the top of the device body 17 is set to be in a closed state; the device body 17 is of a trumpet-shaped structure; the arc guiding balls I8 are of a spherical structure, and the arc guiding balls I8 are arranged in the lower half space inside the device main body 17 at equal intervals; the arc guiding ball I8 and the device main body 17 are tightly embedded, the upper half space of the device main body 17 forms a compression arc extinguishing pipeline, a horn recoil pipe is formed between the arc guiding ball I8 at the bottom end and a horn mouth, and the horn recoil pipe is a semi-closed space; the space formed by the two adjacent arc guide balls I8 and the device main body 17 forms a side-level back flushing pipe, and each side-level back flushing pipe and the corresponding compressed air flow injection channel 12 form a semi-closed space; the arc guiding ball III 11 is of a ball structure, and the arc guiding ball III 11 is inlaid in the arc extinguishing pipeline 10, so that the arc extinguishing pipeline 10 is divided into two semi-closed spaces by the arc guiding ball III 11.

When in use, the compression arc-extinguishing lightning protection device is arranged on the insulator string 2 on one side of the low-voltage end 1, and the head end of the first section of arc-extinguishing pipeline 10 is electrically connected with the insulator string 2 on one side of the low-voltage end 1; the position of the compression arc-extinguishing lightning-protection device corresponds to the lower electrode 4 on one side of the high-voltage end 3, a flashover air channel is arranged in the middle, through insulation matching, lightning overvoltage generated when a tower or a lightning conductor is struck by lightning preferentially punctures the parallel channel to protect the insulator string 2, the formed electric arc enters the recoil type compression arc-extinguishing lightning-protection device, and the electric arc firstly enters the horn recoil pipe; the diameter of the device main body 17 is smaller than that of the electric arc, when the electric arc enters the device main body 17, the electric arc moves inwards, due to the perfusion effect of the narrow pipe of the back flushing pipe, the density, the speed and the temperature of the electric arc are increased step by step when the electric arc enters the initial end of the back flushing pipe, so that the pressure in the pipe is increased step by step, and finally, the pressure explosion effect is generated, so that the electric arc is subjected to elasticity at the bottom of the blocked back flushing pipe, and the direction of the electric arc is changed by 180 degrees. The rebounded arc forms a cavity effect at the inlet and acts on the outer arc due to higher speed, density and pressure, so that the arc at the port is cut off; at this time, the density of the arc in the apparatus main body 17 increases, and the temperature in the apparatus main body 17 rises instantaneously due to the sealing performance of the apparatus main body 17, thereby forming a density difference and a temperature difference between the inside and the outside; the larger the energy of the electric arc entering the recoil pipe is, the stronger the perfusion action of the narrow pipe is, the larger the formed density difference and temperature difference are, the stronger the recoil capacity is, and even the electric arc is extinguished.

Due to the conductivity of the multi-stage arc guide ball I8, the electric arc enters the side-stage back-flushing pipe along the same current to repeat multi-stage back-flushing action, the electric arc is subjected to elasticity, the moving direction of the electric arc is changed, the electric arc is sprayed out from the side nozzle, and generated side jet air flow acts on the electric arc to realize transverse multi-stage cutoff; the larger the arc energy is, the larger the formed density difference and temperature difference are, so that the recoil capacity is stronger; the electric arc is acted by the cavity effect in the horn recoil pipe, the energy of the electric arc is weakened, the energy of the electric arc entering the side-level recoil pipe is reduced, and the electric arc forms a plurality of breakpoints due to the transverse cutoff action of the side-level recoil pipe, so that the extinguishing of the electric arc is accelerated.

After the electric arc is acted on through the recoil, the energy is cut down greatly, and residual electric arc gets into upper portion's arc extinguishing pipe 10 through leading arc ball I8 striking at top, owing to receive the compression effect, forms the multiple spot through inside and outside temperature difference, density difference and pressure differential and sprays the vertical blowing, divides into a plurality of breakpoints to electric arc, realizes the electric arc and cuts off the effect, finally extinguishes electric arc, ensures to extinguish electric arc completely before the circuit breaker breaks off, avoids the circuit breaker tripping operation again when protecting insulator chain 2.

Example 2:

the present embodiment is different from embodiment 1 only in that: the device main body 17 is internally provided with a metal ring 15 and a small platform 16; the small platform 16 is arranged above the backflushing jet orifice; the metal ring 15 is trumpet-shaped, the metal ring 15 is arranged on a small platform 16, and the outer surface of the metal ring 15 is tightly attached to the inner side wall surface of the device main body 17.

The backflushing jet orifice comprises a backflushing jet passage 6 and a bottom backflushing jet orifice 7 at the opening at the bottom of the device main body 17; the outer diameter of the metal ring 15 is tightly attached to the inner diameter of the device main body 17, and the position of the metal ring is fixed through the small platform 16, so that the metal ring 15 is prevented from shifting in the backflushing process; similarly, a plurality of metal rings 15 can be added in the side-level recoil pipe, wherein one metal ring 15 is arranged above the recoil injection channel 6, and one metal ring 15 is added in the bottom recoil injection port 7 at the bottom of the device main body 17; the metal conductivity of the metal ring 15 is utilized to ensure that the electric arc can smoothly enter the device main body 17, so that the back-flushing function is realized, and meanwhile, the metal ring 15 can also play a role in protecting the outlet of the device main body 17 due to the large stress at the outlet of the device main body 17; not only can the metal ring 15 be designed at the bottom outlet of the device body 17, but also the metal ring 15 can be designed at a certain distance of the whole device body 17 to ensure that the arc channel is controlled at a set track.

Example 3:

this example differs from example 1 only in that: the conductive connecting piece is a three-way pipe. Two arc guiding balls II 14 are arranged in the three-way pipe 13; an air gap is arranged between the two arc balls II, and the length of the air gap is just the diameter of the radial pipe of the three-way pipe 13. The radial pipe orifice of the three-way pipe 13 is tightly attached to the inner side wall surface of the device main body, and a corresponding compressed air flow injection channel is arranged on the side wall of the device main body.

The arc guiding ball II 14 is of a ball structure, when electric arc enters the three-way pipe 13, the middle jet orifice of the three-way pipe 13 forms jet air flow to act on the electric arc, and transverse blowing is achieved.

Example 4:

this example differs from example 3 only in that: the device main body 17 is internally provided with a metal ring 15 and a small platform 16; the small platform 16 is arranged above the backflushing airflow jet orifice; the metal ring 15 is trumpet-shaped, the metal ring 15 is arranged on a small platform 16, and the outer surface of the metal ring 15 is tightly attached to the inner side wall surface of the device main body 17.

It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This list is not intended to be exhaustive or exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.

Claims (9)

1. A multi-stage horn-shaped recoil compression arc extinguishing lightning protection device comprises a device main body (17); the method is characterized in that: the inside of the device main body (17) is hollow, the inner diameter and the outer diameter of the device main body (17) are gradually increased from top to bottom, so that the device main body (17) is in a horn shape, a plurality of arc extinguishing paths consisting of arc extinguishing pipelines (10) which are obliquely arranged from top to bottom are arranged in the upper half space, and a plurality of arc guiding balls I (8) which are tightly contacted with the inner side wall of the device main body are arranged in the lower half space from top to bottom;

an arc guide ball III (11) is arranged in the arc extinguishing pipeline (10); the end parts of every two adjacent arc extinguishing pipelines are connected through a conductive connecting piece, and the tail end of the last section of arc extinguishing pipeline is electrically connected with an arc guiding ball I positioned at the top;

a compressed air jet channel (12) is arranged on the side wall of the device body corresponding to the end part of the arc extinguishing pipeline (10), and a compressed air jet orifice (5) is correspondingly arranged on the outer surface of the device body;

a backflushing jet channel (6) is also arranged on the side wall of the device body between the two adjacent arc guide balls I, and backflushing jet orifices are correspondingly arranged on the outer surface of the device body, so that the lower half part of the device body forms a plurality of backflushing pipes in semi-closed spaces.

2. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 1, characterized in that: a metal ring (15) and a small platform (16) are also arranged in the device main body (17); the small platform (16) is arranged above the backflushing airflow jet orifice; the metal ring (15) is horn-shaped, the metal ring (15) is arranged on the small platform (16), and the outer surface of the metal ring (15) is tightly attached to the inner side wall surface of the device body (17).

3. The multi-stage horn-type recoil compression arc extinguishing lightning protection device according to claim 1 or 2, characterized in that: the recoil injection channel (6) is obliquely arranged.

4. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 1, characterized in that: the conductive connecting piece is a wire or a metal sheet or a three-way pipe.

5. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 4, wherein: two arc guide balls II (14) are arranged in the three-way pipe (13); an air gap is arranged between the two arc-shaped balls II, and the length of the air gap is just the diameter of a radial pipe of the three-way pipe (13).

6. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 4, wherein: the radial pipe orifice of the three-way pipe (13) is tightly attached to the inner side wall surface of the device main body, and a corresponding compressed air flow injection channel is arranged on the side wall of the device main body.

7. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 1, characterized in that: the arc guide ball III (11) is arranged in the middle of the arc extinguishing pipeline (10).

8. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 1, characterized in that: the outer surface of the device main body (17) is provided with a plurality of skirt edges (9); the diameter of the skirt (9) is gradually increased from top to bottom on the outer surface of the device main body (17).

9. The multi-stage trumpet-shaped recoil compression arc extinguishing lightning protection device according to claim 1, characterized in that: the lengths of the arc extinguishing pipelines arranged in the upper half space of the device main body are gradually increased from top to bottom, and the lengths of the arc extinguishing pipelines are larger than the length of the inner diameter of the device main body at the corresponding position.

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