CN112103769A - Horn-shaped recoil type compression arc extinguishing lightning protection device - Google Patents
Horn-shaped recoil type compression arc extinguishing lightning protection device Download PDFInfo
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- CN112103769A CN112103769A CN201910305810.0A CN201910305810A CN112103769A CN 112103769 A CN112103769 A CN 112103769A CN 201910305810 A CN201910305810 A CN 201910305810A CN 112103769 A CN112103769 A CN 112103769A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/48—Means for obtaining improved distribution of voltage; Protection against arc discharges over chains or other serially-arranged insulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
- H01T1/08—Means for extinguishing arc using flow of arc-extinguishing fluid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a horn-shaped recoil type compression arc-extinguishing lightning protection device, wherein a plurality of skirt edges are arranged on the outer surface of a device main body, the device main body is gradually enlarged from top to bottom and is horn-shaped, an arc-guiding ball I is embedded in the device main body and divides the device main body into two parts of spaces, an arc-extinguishing path consisting of arc-extinguishing pipelines is arranged in the upper part of the space, arc-guiding balls III are arranged in the arc-extinguishing pipelines, the end parts of every two adjacent arc-extinguishing pipelines are connected through a conductive connecting piece, the tail end of the last section of arc-extinguishing pipeline is electrically connected with the arc-guiding ball I, and a compressed air flow injection channel and a compressed air flow injection port are arranged on. The invention has simple structure, adopts the filling function of the trumpet-shaped back flushing pipe narrow pipe and the transverse and longitudinal blowing function of the compression pipeline on the electric arc, can better generate density difference and temperature difference, can generate stronger back flushing function on the electric arc with large energy, can better cut off the electric arc, greatly reduces the energy of the electric arc, and is beneficial to extinguishing the electric arc.
Description
Technical Field
The invention belongs to the technical field of electric power fittings for power transmission and distribution overhead lines, and relates to a horn-shaped recoil type compression arc extinguishing lightning protection device.
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.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the horn-shaped recoil type compression arc-extinguishing lightning protection device which can generate stronger recoil action on the electric arc with large energy, can better cut off the electric arc, greatly reduces the energy of the electric arc and is beneficial to extinguishing the electric arc.
In order to achieve the purpose, the invention adopts the following technical scheme:
a horn-shaped recoil type compression arc extinguishing lightning protection device comprises a device main body; the outer surface of the device main body is provided with a plurality of skirt edges; 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 horn-shaped, an arc guide ball I is embedded in the device main body, the device main body is divided into two parts by the arc guide ball I, and a plurality of arc extinguishing paths composed of arc extinguishing pipelines which are obliquely arranged from top to bottom are arranged in the upper part of the space; the lower half part of the device main body is a recoil pipe of a semi-closed space; 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 the arc guiding ball I; the side wall of the device body corresponding to the end part of the arc extinguishing pipeline is provided with a compressed air flow jet channel, and the outer surface of the device body is correspondingly provided with a compressed air flow jet orifice.
As a further technical improvement, a plurality of metal rings and small platforms are sequentially arranged in the space of the lower half part of the interior of the device main body from top to bottom; the metal ring is horn-shaped and is arranged on the small platform, the outer surface of the metal ring is tightly attached to the inner side wall surface of the device main body, and one small platform is arranged above the backflushing jet orifice 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; 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; a metal ring is designed at a certain distance from the whole device body to ensure that the arc channel is controlled in the set track.
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, the metal rings are arranged in the space of the lower half part of the device main body at equal intervals.
As a further technical improvement, the arc-guiding ball I is arranged in the middle 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 working principle of the invention is as follows:
the electric arc is a plasma with elastic deformation, after the electric arc enters the back flushing pipe, due to the pouring effect of the narrow pipe of the back flushing pipe, 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 back flushing pipe, so that the pressure in the pipe is increased in a step mode, the pressure explosion effect is finally generated, the electric arc impacts the arc guide ball I in the back flushing pipe, the electric arc is subjected to reverse elasticity at the bottom of the blocked back flushing pipe, and the advancing direction of most of the electric arc is changed by 180 degrees. The rebounded arc is higher in speed, density and pressure, and forms a cavity effect to act on the outer arc at the inlet, so that the arc at the port is cut off.
The back flushing pipe in the present invention is a narrow pipe filling channel, which is the only channel for the electric arc to enter the 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 increase substantially. Because the lightning arc is often used as a constant current source in practical experience work according to a formula
It is known that although the impact time is only a few microseconds, the overall energy increases and the packing temperature in the recoil tube increases.
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 air breaks down to strike an arc due to the fact that the end parts of the upper and lower adjacent arc extinguishing pipelines are close to each other and the arc cannot be effectively blown out can be avoided; 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 guide ball I is of a spherical structure, 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, the lower half space of the device main body forms a horn recoil pipe, and the horn recoil pipe is 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 main body is made of high-strength high-density high-temperature-resistant materials, such as novel insulating materials 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, organic glass and the like.
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, lightning overvoltage generated when a tower or a lightning conductor is struck by lightning preferentially punctures the parallel channel to protect an insulator string through insulation matching, the formed electric arc enters the horn-shaped recoil type compression arc-extinguishing lightning-protection device, and the electric arc firstly enters the horn recoil pipe;
the diameter of the inlet of the device main body is smaller than that of the electric arc, when the electric arc enters the device main body, the electric arc moves inwards, and the perfusion effect of the narrow pipe on the pipe wall of the device main body is stronger; at the moment, the density of the electric arc in the device main body is increased, the temperature in the device main body pipe is instantly increased 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, the limit of the inner wall of the device main body pipe is limited, the density, the speed and the temperature are increased in a step mode when the electric arc enters the initial end of the recoil pipe, the pressure explosion effect is caused, the electric arc is subjected to elastic force at the bottom of the recoil pipe which is blocked, and the direction of the electric arc is changed by 180 degrees. The rebounded arc has larger speed, density and pressure, and forms a cavity effect at the inlet to act on the outer arc, so that the arc at the port is cut off. 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, and even the electric arc is extinguished, so that the back flushing capacity is stronger;
after the electric arc acted on through the recoil, the energy was reduced greatly, and residual electric arc received the compression effect through leading arc ball I entering upper portion's arc extinguishing pipe, and through inside and outside temperature difference, density difference and pressure differential formation multiple spot injection indulge blow, cut apart into a plurality of breakpoints to electric arc, realize the electric arc and cut off the effect, finally extinguish electric arc, ensure to extinguish electric arc completely before the circuit breaker cut-off, avoid the circuit breaker tripping operation again when protecting insulator chain.
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 invention has the following beneficial effects:
1. the invention adopts the horn-shaped recoil pipe as the primary arc-extinguishing chamber, the design of the shape of the horn-shaped recoil pipe can better generate density difference and temperature difference, can generate stronger recoil action on the electric arc with large energy, greatly reduces the energy of the electric arc, and is beneficial to extinguishing the electric arc.
2. According to the invention, the internal truncation effect is firstly carried out on the electric arc through the horn-shaped recoil pipe, then the external truncation effect is carried out on the electric arc through the compression arc extinguishing pipeline, and the internal truncation and the external truncation are combined, so that the electric arc can be better truncated.
3. The device body utilizes the self energy of thunder and lightning to extinguish arc, and is independent of the power frequency energy.
4. The invention changes the temperature difference inside and outside the device body by using the current heat effect, thereby generating air pressure difference to blow out the electric arc, avoiding using external gas generation materials and being beneficial to long-term reuse.
Drawings
Fig. 1 is a schematic view of the installation of the present invention.
Fig. 2 is an external structural view of the present invention.
Fig. 3 is a schematic view of the internal structure of embodiment 1 of the present invention.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is a cross-sectional view of an arc chute of the present invention.
Fig. 6 is a schematic view of the internal structure of embodiment 2 of the present invention.
FIG. 7 is a cross-sectional view of a tee of the present invention.
FIG. 8 is a schematic structural diagram of example 3 of the present invention.
FIG. 9 is a schematic structural diagram of example 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-device main body, 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 and 16-small platform.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1:
a horn-shaped recoil type compression arc extinguishing lightning protection device comprises a device main body 6; the outer surface of the device main body 6 is provided with a plurality of skirt edges 9; the device main body 6 is hollow, the inner diameter and the outer diameter of the device main body 6 are gradually increased from top to bottom, the device main body 6 is in a horn shape, an arc guide ball I8 is embedded in the device main body 6, the device main body 6 is divided into two parts by the arc guide ball I8, and a plurality of arc extinguishing paths composed of arc extinguishing pipelines 10 which are obliquely arranged from top to bottom are arranged in the upper part of the space; the lower half part of the device main body is a recoil pipe of a semi-closed space; 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 the arc guiding ball I8; a compressed air jet passage 12 is provided on a side wall of the apparatus body corresponding to an end of the arc extinguishing duct 10, and a compressed air jet port 5 is provided on an outer surface of the apparatus body correspondingly.
The arc guide ball III 11 is arranged in the middle of the arc extinguishing pipeline 10. The arc guiding ball I8 is arranged in the middle of the device main body 6. The conductive connecting piece is a metal sheet.
The length of the arc extinguishing duct 10 arranged in the upper half space of the apparatus body 6 is gradually increased from top to bottom, and the length of the arc extinguishing duct 10 is larger than the length of the inner diameter of the apparatus body 6 at the position corresponding thereto.
The working principle of this embodiment is as follows:
the arc extinguishing pipes 10 are inclined in the device main body 6, 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 6; an opening at the bottom of the device main body 6 is a bottom backflushing jet orifice 7; the top of the device main body 6 is set to be in a closed state;
the device body 6 is of a horn-shaped structure; the arc guide ball I8 is of a spherical structure, the arc guide ball I8 and the device main body 6 are tightly embedded, the upper half space of the device main body 6 forms a compression arc extinguishing pipeline, the lower half space of the device main body 6 forms a horn recoil pipe, and the horn recoil pipe is a semi-closed space; the arc guide ball III 11 is of a spherical structure, and the arc guide ball III 11 is embedded in the arc extinguishing pipeline 10, so that the arc extinguishing pipeline 10 is divided into two semi-closed spaces by the arc guide 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 horn-shaped 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 6 is smaller than that of the electric arc, when the electric arc enters the device main body 6, the electric arc moves inwards, due to the limitation of the recoil pipe wall 6, 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, the pressure in the pipe is increased in a step mode, finally, a pressure explosion effect is generated, the electric arc is subjected to reverse elasticity at the bottom of the blocked recoil pipe, and the direction of the electric arc is changed by 180 degrees. The reversely rebounded electric arc has higher speed, density and pressure, and forms a cavity effect to act on the outer electric arc at the inlet, so that the electric arc at the port is cut off; at this time, the density of the arc in the apparatus body 6 is increased, and the temperature in the tube of the apparatus body 6 is instantaneously raised due to the sealing performance of the apparatus body 6, 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, and even the larger the energy of the electric arc extinguished is, the stronger the recoil capacity is;
after the electric arc acted on through the recoil, the energy was reduced greatly, and residual electric arc received the compression effect through leading arc ball I8 entering upper portion's arc extinguishing pipe 10, and the multiple spot injection is indulged and is blown through inside and outside temperature difference, density difference and pressure differential formation, cuts apart 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:
this example differs from example 1 only in that: a plurality of metal rings 15 and small platforms 16 are sequentially arranged in the lower half space inside the device main body 6 from top to bottom; the metal ring 15 is trumpet-shaped, the metal ring 15 is arranged on a small platform 16, the outer surface of the metal ring 15 is tightly attached to the inner side wall surface of the device main body 6, and one small platform is arranged above the recoil jet orifice 7 at the bottom of the device main body. The metal rings 15 are disposed in the lower half space of the apparatus body at equal intervals.
The outer diameter of the metal ring 15 is tightly attached to the inner diameter of the device main body 6, 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; the metal conductivity of the metal ring 15 is utilized to ensure that the electric arc can smoothly enter the device main body 6, 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 6 due to the large stress at the outlet of the device main body 6; not only is the metal ring 15 designed at the bottom outlet of the device body 6, but also a metal ring 15 can be designed at a certain distance from the whole device body 6 to ensure that the arc channel is controlled at the track which we set.
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: a plurality of metal rings 15 and small platforms 16 are sequentially arranged in the lower half space inside the device main body 6 from top to bottom; the metal ring 15 is trumpet-shaped, the metal ring 15 is arranged on a small platform 16, the outer surface of the metal ring 15 is tightly attached to the inner side wall surface of the device main body 6, and one small platform is arranged above the recoil jet orifice 7 at the bottom of the device main body. The metal rings 15 are disposed in the lower half space of the apparatus body at equal intervals.
It should be understood that the above-mentioned embodiments are only examples for clearly illustrating the present invention, and are not to be construed as limiting the implementation. 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 variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (8)
1. A horn-shaped recoil type compression arc extinguishing lightning protection device comprises a device main body (6); the outer surface of the device main body (6) is provided with a plurality of skirt edges (9);
the method is characterized in that: the device main body (6) is hollow, the inner diameter and the outer diameter of the device main body (6) are gradually increased from top to bottom, the device main body (6) is horn-shaped, an arc guide ball I (8) is embedded in the device main body (6), the arc guide ball I (8) divides the device main body (6) into two parts of space, and 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 part of space; the lower half part of the device main body is a recoil pipe of a semi-closed space;
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 (8);
the side wall of the device body corresponding to the end part of the arc extinguishing pipeline (10) is provided with a compressed air flow jet channel (12), and the outer surface of the device body is correspondingly provided with a compressed air flow jet orifice (5).
2. The horn-type recoil compression arc extinguishing lightning protection device according to claim 1, wherein: a plurality of metal rings (15) and small platforms (16) are sequentially arranged in the lower half space inside the device main body (6) from top to bottom; the metal ring (15) is horn-shaped, the metal ring is installed on the corresponding small platform, the outer surface of the metal ring (15) is tightly attached to the inner side wall surface of the device main body (6), and one small platform is installed above the backflushing jet orifice at the bottom of the device main body (6).
3. The horn-type recoil compression arc extinguishing lightning protection device according to claim 2, wherein: the metal rings (15) are arranged in the lower half space of the device main body (6) at equal intervals.
4. The horn-type recoil compression arc extinguishing lightning protection device according to claim 1, wherein: the conductive connecting piece is a wire or a metal sheet or a three-way pipe.
5. The horn-type 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 horn-type 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 horn-type recoil compression arc extinguishing lightning protection device according to claim 1, wherein: the arc guide ball III (11) is arranged in the middle of the arc extinguishing pipeline (10).
8. The horn-type recoil compression arc extinguishing lightning protection device according to claim 1, wherein: the lengths of the arc extinguishing pipelines (10) distributed in the upper half space of the device main body (6) are gradually increased from top to bottom, and the lengths of the arc extinguishing pipelines (10) are larger than the inner diameter lengths of the device main body (6) at the corresponding positions.
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| CN201910305810.0A CN112103769B (en) | 2019-06-17 | 2019-06-17 | Horn-type recoil type compression arc extinguishing lightning protection device |
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| CN201910305810.0A CN112103769B (en) | 2019-06-17 | 2019-06-17 | Horn-type recoil type compression arc extinguishing lightning protection device |
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| CN112103769B CN112103769B (en) | 2023-08-15 |
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| CN106356266A (en) * | 2016-11-24 | 2017-01-25 | 河南平芝高压开关有限公司 | Arc extinguishing chamber and breaker adopting arc extinguishing chamber |
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| CN112103769B (en) | 2023-08-15 |
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