CN215600734U - Multistage liquid recoil arc-extinguishing device - Google Patents
Multistage liquid recoil arc-extinguishing device Download PDFInfo
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- CN215600734U CN215600734U CN202121851947.5U CN202121851947U CN215600734U CN 215600734 U CN215600734 U CN 215600734U CN 202121851947 U CN202121851947 U CN 202121851947U CN 215600734 U CN215600734 U CN 215600734U
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Abstract
The utility model discloses a multistage liquid recoil arc extinguishing device, which belongs to the technical field of lightning protection and arc extinguishing, and comprises an inclined recoil device and a vertical sealed arc extinguishing device, wherein the inclined recoil device is not parallel to and perpendicular to the vertical sealed arc extinguishing device, an inclined recoil pipe insulating liquid and insulating oil are respectively arranged in the inclined recoil device and the vertical sealed arc extinguishing device, the vertical sealed arc extinguishing device is filled with the insulating oil, and the inclined recoil device is arranged in an inclined upward manner. The lightning current is discharged to the ground through an arc extinguishing channel formed by a plurality of ceramic tubes. The air gap between the ceramic tube and the ceramic tube prolongs the ground entering time of lightning current, so that the staying time of the electric arc in the recoil tube is increased, the damage of instantaneous heavy current to electronic equipment and buildings is reduced, a plurality of electric arc breaking points are added, the electric arc is synchronously cut off at multiple points for penetrating flashover, the long electric arc is divided into short electric arcs and short electric arc units are extinguished step by step, the arc extinguishing capability of the long electric arc is improved, and the reignition of the electric arc is effectively inhibited.
Description
Technical Field
The utility model relates to the technical field of lightning protection and arc extinction, in particular to a multistage liquid recoil arc extinction device.
Background
The parallel gap has been widely used in various voltage class lines due to its simple structure, convenient installation and low price. The use of parallel gaps on overhead transmission lines has been studied in japan, germany, france, etc. since the 60's of the 20 th century. China also develops parallel gap lightning protection devices of different voltage levels. However, the parallel gap device has a simple structure, so that the lightning trip-out rate is increased, and the service life of the breaker is shortened due to frequent on-load short-circuit arc breaking; the parallel gap must be used in conjunction with the recloser to exert its protective effect. In addition, the long-time power frequency arc ignition can cause accidents such as insulator damage, wire breakage and the like, so that the development of a parallel gap device capable of automatically extinguishing the arc is necessary.
Aiming at the defects that the common parallel gap has weak self-arc-extinguishing capability, lacks of rapid arc-extinguishing capability, is easy to generate line insulator flashover, generates large power-frequency follow current and damages an insulator chain and hardware fittings, a multistage liquid-state recoil arc-extinguishing device needs to be researched.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a multistage liquid recoil arc-extinguishing device, which solves the technical problems that the existing parallel gap has weak self-arc-extinguishing capability, lacks of rapid arc-extinguishing capability, is easy to generate line insulator flashover, generates large power frequency follow current and damages an insulator chain and hardware fittings. According to the utility model, the energy of the electric arc is utilized to heat the gas in the ceramic tube, so that the temperature in the ceramic tube is increased, the pressure is increased, the electric arc is ejected out of the chamber, and the occurrence of lightning trip is avoided. When the electric arcs pass through each back-flushing pipe one by one, the time for the lightning current to release energy is obviously prolonged, and the damage of instantaneous heavy current to electronic equipment and buildings is reduced. The gas in the ceramic tube is heated by the self energy of the electric arc, so that the temperature in the ceramic tube is increased, the pressure is increased, the electric arc is ejected out of the cavity, and the cold air is cooled to extinguish the arc.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
multistage liquid recoil arc control device, including slope recoil device and vertical sealed arc control device, slope recoil device and vertical sealed arc control device nonparallel and out of plumb setting are provided with slope recoil pipe insulating liquid and insulating oil in slope recoil device and the vertical sealed arc control device respectively, and insulating oil fills up vertical sealed arc control device, and slope recoil device slope upwards sets up, and slope recoil device and vertical sealed arc control device department are provided with metal electrode.
Furthermore, the inclined backflushing device comprises an inclined backflushing pipe, an inclined backflushing pipe bottom electrode and an insulating material, the inclined backflushing pipe bottom electrode is arranged at the bottom of the inclined backflushing pipe and is arranged in a grounding mode, the other opening end of the inclined backflushing pipe is arranged on the metal electrode, the insulating material is arranged between the metal electrode and the inclined backflushing pipe bottom electrode, and the insulating material wraps the outer side of the inclined backflushing pipe.
Further, vertical sealed arc control device includes one or more vertical sealed arc extinguishing bucket, and the setting is met end to a plurality of vertical sealed arc extinguishing bucket, and sets up on same vertical line, and the bottom ground connection of the vertical sealed arc extinguishing bucket of least significant end.
Further, vertical sealed arc extinguishing bucket includes metal sheet, sealed tube bottom electrode, and the metal sheet is sealed to be set up at the top of sealed tube, and sealed tube bottom electrode is sealed to be set up in the bottom of sealed tube, and the inner space of sealed tube is filled with insulating oil.
Furthermore, metal bars are arranged on the metal plate and the electrode at the bottom of the sealing tube, the two metal bars are arranged oppositely and do not contact with each other, and insulating oil is filled between the two metal bars.
Further, the length of the two metal rods is less than one half of the length of the sealing tube.
Further, the arc extinguishing process is divided into four steps, step 1: when a tower or a power transmission line is struck by lightning, a Pascal effect is caused in an electric arc pouring stage, when a lightning arc is poured into a sealing pipe, the diameter of the electric arc is thinned, axial pressure is generated at the same time, after any point in incompressible static fluid is subjected to pressure increment caused by external force, the pressure increment is instantly transmitted to each point of the static fluid, then, in the electric arc pouring stage, the pressure change generated in the sealing pipe is constantly transmitted to each direction, the pressure in the sealing pipe is further increased, then, the reaction force impacts the electric arc towards the center, and the electric arc is impacted by a larger action force, so that the purpose of cutting off the electric arc is achieved;
step 2: after pre-breakdown occurs, the electric arc causes a liquid-electric effect after pre-breakdown, an electric arc is formed among iron rods in the sealed tube, the electric arc discharges in the sealed tube containing insulating oil, partial liquid in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expands to form a mechanical pressure wave which is transmitted outwards, but the liquid can be regarded as a shock wave transmission medium which can not be compressed, so that when the discharge channel discharges in a liquid phase, an ultrahigh-power mechanical effect is shown to the outside, an impact acting force is formed in the ceramic tube and acts on the discharge channel in an impulse or impact pressure mode to impact the electric arc and cut off the electric arc;
the residual energy forms an electric arc in the inclined recoil pipe 1 through the metal electrode, and when the electric arc enters the inclined recoil pipe 1 containing liquid, the temperature of plasma generated by liquid phase discharge is as high as 1500-3000K. High temperature and high pressure generated in the ceramic tube cannot be leaked outwards in time. The shock wave is reflected back and forth on the inner wall surface of the ceramic tube to generate a reflected shock wave, and the reflected shock wave is ejected from the arc inlet.
And step 3: the length of the ceramic tube is 50mm, the diameter of the ceramic tube is 10mm, the length of an electric arc formed in the ceramic tube after lightning stroke is long enough, the recoil principle is that the electric arc is extinguished by utilizing the energy of the long electric arc, the longer the electric arc formed in the ceramic tube is, the more obvious the Pascal effect is, the larger the pressure in the ceramic tube is, and the larger the impact force for cutting off the electric arc is;
and step 3: when lightning current pulse is injected into the metal rod, the liquid phase of the metal material is discharged to generate shock wave, under the action of joule heat, partial metal material on the metal rod is vaporized, decomposed and ionized to form high-temperature plasma, and finally the high-temperature plasma is developed to form a plasma channel, because the impact time of the lightning current pulse is extremely short, the insulating oil in the ceramic tube cannot be instantaneously deformed and displaced, and the pressure of about 100Mpa is generated in the ceramic tube under the action of the liquid-electric effect to generate the shock wave, so that the electric arc is cut off.
Due to the adoption of the technical scheme, the utility model has the following beneficial effects:
the lightning current of the utility model is discharged into the ground through an arc extinguishing channel formed by a plurality of ceramic tubes. The air gap between the ceramic tube and the ceramic tube prolongs the ground entering time of lightning current, so that the staying time of the electric arc in the recoil tube is increased, the damage of instantaneous heavy current to electronic equipment and buildings is reduced, a plurality of electric arc breaking points are added, the electric arc is synchronously cut off at multiple points for penetrating flashover, the long electric arc is divided into short electric arcs and short electric arc units are extinguished step by step, the arc extinguishing capability of the long electric arc is improved, and the reignition of the electric arc is effectively inhibited.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the attached figure, 1-inclined recoil pipe, 2-inclined recoil pipe bottom electrode, 3-inclined recoil pipe insulating liquid, 4-insulating material, 5-metal electrode, 6-metal plate, 7-sealing pipe, 8-sealing pipe bottom electrode, 9-metal rod and 10-insulating oil.
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.
As shown in fig. 1, the multistage liquid recoil arc extinguishing device comprises an inclined recoil device and a vertical sealed arc extinguishing device, wherein the inclined recoil device and the vertical sealed arc extinguishing device are not parallel and perpendicular to each other, an inclined recoil pipe insulating liquid 3 and insulating oil 10 are respectively arranged in the inclined recoil device and the vertical sealed arc extinguishing device, the vertical sealed arc extinguishing device is filled with the insulating oil 10, the inclined recoil device is inclined and upwards arranged, and a metal electrode 5 is arranged at the inclined recoil device and the vertical sealed arc extinguishing device. Vertical sealed arc control device forms the pascal effect, and when electric arc formed, owing to be inclosed structure, liquid can be squeezed to electric arc for liquid produces outside pressure, then because the recoil of acting force of lateral wall returns, the electric arc department at the direct directional center of acting force, can be quick extinguish electric arc.
In the embodiment of the utility model, the inclined backflushing device comprises an inclined backflushing pipe 1, an inclined backflushing pipe bottom electrode 2 and an insulating material 4, wherein the inclined backflushing pipe bottom electrode 2 is arranged at the bottom of the inclined backflushing pipe 1 and is arranged in a grounding mode, the other opening end of the inclined backflushing pipe 1 is arranged on a metal electrode 5, the insulating material 4 is arranged between the metal electrode 5 and the inclined backflushing pipe bottom electrode 2, and the insulating material 4 is wrapped on the outer side of the inclined backflushing pipe 1. The inclined recoil device firstly carries out recoil arc extinguishing at the upper end on the electric arc, and the electric arc is introduced through two lines simultaneously, so that the electric arc is reduced, the electric arc is better extinguished, one is the recoil arc extinguishing, the other is the sealed arc extinguishing, the device has a faster effect, and the electric arc with higher voltage can be extinguished.
In the embodiment of the utility model, the vertical sealed arc-extinguishing device comprises one or more than one vertical sealed arc-extinguishing barrel, a plurality of vertical sealed arc-extinguishing barrels are arranged end to end and are arranged on the same vertical line, and the bottom of the vertical sealed arc-extinguishing barrel at the lowest end is grounded.
In the embodiment of the utility model, the vertical sealed arc extinguishing barrel comprises a metal plate 6, a sealing tube 7 and a sealing tube bottom electrode 8, wherein the metal plate 6 is arranged at the top of the sealing tube 7 in a sealing manner, the sealing tube bottom electrode 8 is arranged at the bottom of the sealing tube 7 in a sealing manner, and the insulating oil 10 fills the inner space of the sealing tube 7.
In the embodiment of the utility model, the metal plate 6 and the bottom electrode 8 of the sealing tube are both provided with the metal rods 9, the two metal rods 9 are oppositely arranged and are not in contact with each other, and the insulating oil 10 is filled between the two metal rods 9. The length of the two metal rods 9 is less than half of the length of the sealing tube 7.
The ceramic tube is cylindrical, wherein the sealing tube 7 is vertically arranged, the ceramic tube is filled with insulating oil, the upper end and the lower end of the sealing tube 7 are sealed by cylindrical metal plates, and a thick metal rod is respectively arranged in the centers of the upper metal plate and the lower metal plate and is immersed in the insulating oil; a metal electrode is arranged at the upper port of the inclined recoil pipe 1, and the sealing pipe 7 and the inclined recoil pipe 1 form a certain angle and are connected by adopting the metal electrode; the lower port of the inclined recoil pipe 1 is connected with a grounding terminal through a metal electrode.
The ceramic tube is cylindrical, wherein the sealing tube 7 is vertically arranged, the ceramic tube is filled with insulating oil, the upper end and the lower end of the sealing tube 7 are sealed by cylindrical metal plates, and a metal rod is respectively arranged in the centers of the upper metal plate and the lower metal plate and is immersed in the insulating oil; a metal electrode is arranged at the upper port of the inclined recoil pipe 1, and the sealing pipe 7 and the inclined recoil pipe 1 form a certain angle and are connected by adopting the metal electrode; the lower port of the inclined recoil pipe 1 is connected with a grounding terminal through a metal electrode.
When the tower or the transmission line is struck by lightning, electric arcs can be formed in the ceramic tubes filled with insulating oil, a liquid-electricity effect is generated, strong shock waves are formed, and the shock waves act on a discharge channel in an impulse or shock pressure mode to cut off the electric arcs. The ceramic tube is made of high-hardness, high-temperature-resistant and high-pressure-resistant inorganic non-metallic materials, and the space inside the ceramic tube is a main area where arc extinction occurs. Meanwhile, when the metal electrode is struck by lightning, the electric arc discharges in the sealed tube 7, which causes the pascal effect, so that the pressure in the sealed tube 7 is further increased, and the electric arc in the sealed tube 7 is impacted by a larger acting force.
The residual energy is transferred into the inclined recoil pipe 1 from the sealing pipe 7 through the metal electrode, the electric arc discharges in the inclined recoil pipe 1 filled with liquid, the superposition of the Pascal effect and the liquid-electric effect can be caused, a strong shock wave is formed, the strong shock wave acts on a discharge channel in an impulse or impact pressure mode, and the electric arc is cut off. The remaining little energy is grounded through the ground terminal.
The arc perfusion phase causes the pascal effect: when a tower or a power transmission line is struck by lightning and a lightning arc is poured into the sealing tube 7, the diameter of the arc is thinned and axial pressure is generated at the same time; according to the pascal principle: after any point in the incompressible static fluid is subjected to pressure increment generated by external force, the pressure increment is instantaneously transmitted to each point of the static fluid. In the arc pouring stage, the pressure change generated in a certain part of the sealing tube 7 is transmitted in all directions invariably, so that the pressure in the sealing tube 7 is further increased, the arc is impacted by a larger acting force, and the aim of cutting off the arc is fulfilled.
The electro-hydraulic effect is caused after the electric arc is pre-punctured: after pre-breakdown occurs, an electric arc is formed between iron rods in the sealed tube 7, the electric arc discharges in the sealed tube 7 containing insulating oil, and part of liquid in a discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expands to form a mechanical pressure wave which rapidly spreads outwards. However, since the liquid can be regarded as a shock wave transmission medium which cannot be compressed, when the discharge channel discharges in a liquid phase, an ultrahigh-power mechanical effect is shown to the outside, an impact acting force is formed in the ceramic tube and acts on the discharge channel in an impulse or impact pressure mode to impact an electric arc and cut off the electric arc.
The residual energy forms an electric arc in the inclined recoil pipe 1 through the metal electrode, and when the electric arc enters the inclined recoil pipe 1 containing liquid, the temperature of plasma generated by liquid phase discharge is as high as 1500-3000K. High temperature and high pressure generated in the ceramic tube cannot be leaked outwards in time. The shock wave is reflected back and forth on the inner wall surface of the ceramic tube to generate a reflected shock wave, and the reflected shock wave is ejected from the arc inlet.
The long arc in the ceramic tube has large energy and large recoil force: the length of the ceramic tube is up to 50mm and the diameter is up to 10mm, so that the length of the arc formed in the ceramic tube after a lightning strike is sufficiently long. The principle of the recoil is to utilize the energy of the long electric arc to extinguish the arc, the longer the electric arc formed in the ceramic tube, the more obvious the Pascal effect is, the higher the pressure in the ceramic tube is, and the larger the impact force for cutting off the electric arc is.
The liquid phase discharge of the metal material generates shock waves: when the lightning current pulse is injected into the metal rod, under the action of joule heat, partial metal material on the metal rod is vaporized, decomposed and ionized into high-temperature plasma, and finally develops to form a plasma channel. Because the impact time of the lightning pulse is extremely short, the insulating oil in the ceramic tube cannot instantaneously deform and displace, and the inside of the ceramic tube generates about 100Mpa pressure under the action of the liquid-electric effect to generate shock waves to cut off electric arcs.
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 (6)
1. Multistage liquid recoil arc control device, its characterized in that: including slope recoil device and vertical sealed arc control device, slope recoil device and vertical sealed arc control device nonparallel and out of plumb setting are provided with slope recoil pipe insulating liquid (3) and insulating oil (10) respectively in slope recoil device and the vertical sealed arc control device, and vertical sealed arc control device is filled up in insulating oil (10), and slope recoil device slope upwards sets up, and slope recoil device and vertical sealed arc control device department are provided with metal electrode (5).
2. The multi-stage liquid recoil arc extinguishing device of claim 1, wherein: the inclined backflushing device comprises an inclined backflushing pipe (1), an inclined backflushing pipe bottom electrode (2) and an insulating material (4), the inclined backflushing pipe bottom electrode (2) is arranged at the bottom of the inclined backflushing pipe (1) and is arranged in a grounding mode, the other opening end of the inclined backflushing pipe (1) is arranged on a metal electrode (5), the insulating material (4) is arranged between the metal electrode (5) and the inclined backflushing pipe bottom electrode (2), and the insulating material (4) wraps the outer side of the inclined backflushing pipe (1).
3. The multi-stage liquid recoil arc extinguishing device of claim 1, wherein: the vertical sealed arc extinguishing device comprises one or more vertical sealed arc extinguishing barrels, the vertical sealed arc extinguishing barrels are arranged end to end and arranged on the same vertical line, and the bottom of the vertical sealed arc extinguishing barrel at the lowest end is grounded.
4. The multi-stage liquid recoil arc extinguishing device of claim 3, wherein: vertical sealed arc extinguishing bucket includes metal sheet (6), sealed tube (7), sealed tube bottom electrode (8), and the sealed top that sets up in sealed tube (7) of metal sheet (6), and sealed tube bottom electrode (8) are sealed to be set up in the bottom of sealed tube (7), and the inner space of sealed tube (7) is filled in insulating oil (10).
5. The multi-stage liquid recoil arc extinguishing device of claim 4, wherein: metal bars (9) are arranged on the metal plate (6) and the sealing tube bottom electrode (8), the two metal bars (9) are arranged oppositely and are not in contact with each other, and insulating oil (10) is filled between the two metal bars (9).
6. The multi-stage liquid recoil arc extinguishing device of claim 5, wherein: the length of the two metal rods (9) is less than half of the length of the sealing tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121851947.5U CN215600734U (en) | 2021-08-09 | 2021-08-09 | Multistage liquid recoil arc-extinguishing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121851947.5U CN215600734U (en) | 2021-08-09 | 2021-08-09 | Multistage liquid recoil arc-extinguishing device |
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| Publication Number | Publication Date |
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| CN215600734U true CN215600734U (en) | 2022-01-21 |
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| CN202121851947.5U Active CN215600734U (en) | 2021-08-09 | 2021-08-09 | Multistage liquid recoil arc-extinguishing device |
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| CN (1) | CN215600734U (en) |
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- 2021-08-09 CN CN202121851947.5U patent/CN215600734U/en active Active
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