CN113594861A - Lightning protection device for multipoint arc interruption under hydraulic effect pressure - Google Patents
Lightning protection device for multipoint arc interruption under hydraulic effect pressure Download PDFInfo
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- CN113594861A CN113594861A CN202110910631.7A CN202110910631A CN113594861A CN 113594861 A CN113594861 A CN 113594861A CN 202110910631 A CN202110910631 A CN 202110910631A CN 113594861 A CN113594861 A CN 113594861A
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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
- 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
- H01T19/00—Devices providing for corona discharge
- H01T19/04—Devices providing for corona discharge having pointed electrodes
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Abstract
The invention discloses a lightning protection device for multipoint arc interruption under the action of hydraulic effect pressure, which belongs to the technical field of arc extinction and lightning protection. The invention can cut off the electric arc quickly, the electric arc discharges in the liquid to generate the liquid-electric effect, the impact pressure wave is formed quickly, and the impact electric arc is cut off immediately when being formed. The reignition of the impact arc is delayed, the high voltage in the ceramic tube destroys the continuous discharge condition and the reignition condition, the reignition breakdown time is greatly delayed by more than ten to dozens of microseconds after the impact arc is cut off, the gradient of lightning current is obviously reduced by 90%, and the current amplitude is attenuated by more than 50%.
Description
Technical Field
The invention relates to the technical field of arc extinction and lightning protection, in particular to a lightning protection device for multipoint arc interruption by using hydraulic effect pressure.
Background
Lightning strikes can cause damage and destruction of electrical facilities in different forms, and thundercloud discharge can cause lightning strike overvoltage in an electrical power system. Lightning overvoltage can damage insulators and power transmission lines; the line insulator flashover is caused by impact flashover caused by lightning strike on the transmission line, and then large power frequency follow current is generated to damage the insulator string and hardware fittings, so that line accidents are caused; lightning strikes on a power transmission line or a lightning conductor can cause strand breakage and even breakage, so that power transmission work cannot be carried out. Therefore, a lightning protection device for multi-point arc interruption is needed.
Disclosure of Invention
The invention aims to provide a lightning protection device for multipoint arc interruption by using hydraulic effect pressure, which solves the technical problems that the existing lightning protection arc-extinguishing device is low in arc-extinguishing speed and is easy to cause tripping accidents. Increase the truncation point, carry out the multiple spot and cut off the arc extinguishing, realize going out fast of long electric arc, aim at improves lightning protection arc extinguishing device's arc extinguishing speed, reduces thunderbolt accident rate and trip rate, improves the stability of electric wire netting operation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a lightning protection device of electric arc is interrupted to hydroelectric effect pressure multiple spot, lightning protection device sets up to a sealed tube, and the sealed tube both ends set up electrode and lower electrode seal respectively and set up, are provided with insulating oil in the sealed tube, and the side of sealed tube is provided with the shirt rim, and the inboard edge of sealed tube is gone up the interval and is provided with the arc extinguishing bars, and arc extinguishing bars lateral length is greater than the half internal diameter of sealed tube. The ceramic tube is cylindrical, and the interior of the ceramic tube is filled with insulating oil; the arc-extinguishing grid is arranged in the ceramic tube, and the upper end and the lower end of the ceramic tube are sealed by cylindrical metal plates; the upper electrode and the lower electrode are respectively connected with the upper metal plate and the lower metal plate to play a role in arc striking; the skirt is annular and is arranged outside the shell.
Further, the sealing tube further comprises a ceramic tube and a protective shell, the protective shell is arranged on the outer side of the ceramic tube, and the skirt edge is arranged on the outer side of the protective shell.
Further, the upper electrode comprises an upper graphite electrode, a middle metal electrode and a lower graphite electrode, the middle metal electrode is fixed at one end of the ceramic tube and one end of the protective shell, the upper graphite electrode is arranged on the upper layer of the middle metal electrode, the lower graphite electrode is arranged at the bottom of the middle metal electrode and is arranged in the ceramic tube, the lower electrode comprises an upper graphite electrode and a bottom metal electrode, the bottom metal electrode is fixed at the other end of the ceramic tube and the other end of the protective shell, and the upper graphite electrode is arranged in the ceramic tube and is connected with the bottom metal electrode.
Furthermore, the lightning protection device is composed of more than two lightning protection devices, a plurality of lightning protection devices are fixedly connected in an end-to-end mode, and the bottom end of the lightning protection device at the bottom end is grounded.
Furthermore, the bottom of the upper electrode is provided with an upper tip electrode, the upper end of the lower electrode is provided with a lower tip electrode, the upper tip electrode and the lower tip electrode are arranged vertically relatively, and the upper tip electrode and the lower tip electrode are graphite electrodes.
Further, the arc extinguishing bars are made of insulating materials, the arc extinguishing bars are arranged into semicircular structures, the arc extinguishing bars arranged on the inner side walls of the two semicircles in the sealing tube are arranged alternately, convex piers are arranged between the arc extinguishing bars on the same semicircle, and the convex piers on the inner side wall of one semicircle are arranged opposite to the arc extinguishing bars on the inner side wall of the other semicircle.
Further, the arc extinguishing process of the lightning protection device is as follows,
step 1: when arc discharge is initiated in the sealed tube filled with insulating oil, shock waves towards the side edges are generated by the liquid electricity effect;
step 2: the Pascal effect enhances the liquid electric effect, when electric arcs act on the insulating oil, when a certain part of static insulating oil generates pressure intensity change, the electric arcs constantly transmit the pressure intensity to all directions of the inner side of the sealing pipe;
and step 3: because the arc extinguishing bars are arranged in the sealed tube, the length of the electric arc in the sealed tube is prolonged, the convex piers are arranged to increase the surface area of the sealed tube, the impact waves of the liquid-electric effect and the Pascal effect return to the side edge and impact, the electric arc channel is impacted and arc-extinguished in a centralized mode, and arc extinguishing is completed.
Further, the specific process of the step 1 is that arc discharge is initiated in the ceramic tube filled with insulating oil, part of the insulating oil in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expanded to form a mechanical pressure wave which rapidly spreads outwards, but the liquid can be regarded as a shock wave transmission medium which can not be compressed, so that the mechanical effect of power is shown to the outside when the discharge channel carries out liquid-phase discharge, acting force which impacts the wall of the ceramic tube is formed in the ceramic tube, and the wall of the ceramic tube generates the shock wave in the insulating oil medium due to the interaction of the force.
Further, the specific process of step 2 is: when an impact electric arc acts on the metal electrode to apply pressure to the insulating oil in the ceramic tube, according to the Pascal principle, a certain part of static fluid in the closed container generates pressure change, the pressure is constantly transmitted to all directions, and then the insulating oil medium around is impacted by a larger acting force from a discharge channel in the ceramic tube, and the acting force rebounds after contacting the wall of the ceramic tube.
Further, the specific process of step 3 is that the pressure in the ceramic tube is increased and the temperature is increased by the liquid-electric effect and the pascal effect, so that an acting force pointing to the center from the ceramic tube wall is generated, under the acting force, the arc moves towards the tip of the arc chute, the tip lengthens the length of the arc, and under the blowing of the insulating oil to the arc, the temperature of the arc is reduced, so that the arc is extinguished more rapidly, the longer the arc formed in the ceramic tube is, the greater the acting force is applied to the ceramic tube wall, and in turn, the greater the impact force for cutting off the arc is, and the arc extinction is completed.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the invention can cut off the electric arc quickly, the electric arc discharges in the liquid to generate the liquid-electric effect, the impact pressure wave is formed quickly, and the impact electric arc is cut off immediately when being formed.
(2) The reignition of the impact arc is delayed, the high voltage in the ceramic tube destroys the continuous discharge condition and the reignition condition, the reignition breakdown time is greatly delayed by more than ten to dozens of microseconds after the impact arc is cut off, the gradient of lightning current is obviously reduced by 90%, and the current amplitude is attenuated by more than 50%.
(3) The direct lightning overvoltage is effectively protected, when a pilot channel of lightning discharge hits a wire, a tower or other buildings of a power transmission line, the arc extinguishing method based on the Pascal principle can reduce the overvoltage amplitude, prolong the discharge time and avoid the damage of the direct lightning overvoltage to equipment and devices.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the high-pressure sealing structure of the sealing tube of the present invention;
fig. 3 is a schematic view of the external reinforcement structure of the sealing tube of the present invention.
In the figure, 1-upper electrode, 2-insulating oil, 3-ceramic tube, 4-skirt edge, 5-protective shell, 6-lower electrode, 7-electric arc, 8-upper tip electrode, 9-arc-extinguishing grid, 10-convex pier and 11-lower tip electrode.
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 figure 1, the lightning protection device for the hydroelectric effect pressure multipoint interruption electric arc is arranged into a sealing tube, an upper electrode 1 and a lower electrode 6 are arranged at two ends of the sealing tube respectively in a sealing mode, insulating oil 2 is arranged in the sealing tube, a skirt edge 4 is arranged on the side edge of the sealing tube, arc-extinguishing barriers 9 are arranged on the inner side edge of the sealing tube at intervals, and the transverse length of each arc-extinguishing barrier 9 is larger than the half inner diameter of the sealing tube. The sealing tube further comprises a ceramic tube 3 and a protective shell 5, wherein the protective shell 5 is arranged on the outer side of the ceramic tube 3, and the skirt edge 4 is arranged on the outer side of the protective shell 5.
The ceramic tube filled with the insulating oil is made of high-hardness, high-temperature-resistant and high-pressure-resistant inorganic non-metallic materials and is cylindrical; an arc extinguishing grid is arranged inside the ceramic tube and is a main area for cutting off electric arcs; the upper end and the lower end of the cylindrical ceramic tube are sealed by metal plates.
After the metal plate is subjected to lightning, a liquid-electric effect can be generated inside the ceramic tube filled with the insulating oil, a strong shock wave is formed, and the shock wave acts on a discharge channel in an impulse or shock pressure mode to cut off electric arcs. Meanwhile, when the metal electrode is struck by lightning, certain pressure is applied to the insulating oil in the ceramic tube, and according to the Pascal principle, the pressure change of a certain part of static fluid in the closed container is constantly transmitted to all directions, so that larger acting force is generated on the inner wall of the ceramic tube. The action force rebounds after acting on the ceramic tube wall to form an action force with the direction pointing to the center of the ceramic tube, under the action force, the electric arc moves towards the tip of the arc-extinguishing grid, the tip lengthens the length of the electric arc, and under the blowing action of the insulating oil on the electric arc, the temperature of the electric arc is reduced, and the electric arc is quickly extinguished.
In the embodiment of the invention, the upper electrode 1 comprises an upper graphite electrode, a middle metal electrode and a lower graphite electrode, the middle metal electrode is fixed at one end of the ceramic tube 3 and the protective shell 5, the upper graphite electrode is arranged at the upper layer of the middle metal electrode, the lower graphite electrode is arranged at the bottom of the middle metal electrode and is arranged in the ceramic tube 3, the lower electrode 6 comprises an upper graphite electrode and a bottom metal electrode, the bottom metal electrode is fixed at the other end of the ceramic tube 3 and the protective shell 5, and the upper graphite electrode is arranged in the ceramic tube 3 and is connected with the bottom metal electrode.
In the embodiment of the invention, the bottom of the upper electrode 1 is provided with an upper tip electrode 8, the upper end of the lower electrode 6 is provided with a lower tip electrode 11, the upper tip electrode 8 and the lower tip electrode 11 are relatively vertically arranged, and both the upper tip electrode 8 and the lower tip electrode 11 are graphite electrodes.
The graphite electrode is arranged at the lightning receiving place, so that the service life can be effectively prolonged.
The graphite electrode has good conductivity, and is easy to introduce electric arc into the recoil pipe: graphite is a non-metallic material, and the conductivity of graphite is 100 times higher than that of general non-metallic ore. Graphite is an electrical conductor in that the periphery of each carbon atom in graphite is linked to three other carbon atoms arranged in a honeycomb pattern of many hexagons, and since each carbon atom gives off an electron, those electrons are free to move. Generally, the electrical discharge machining speed of the graphite electrode is 1.5 to 2 times faster than that of the copper electrode as a whole. When the power transmission line is struck by lightning, the graphite electrode can play a role in striking arcs, so that the arcs can smoothly enter the arc extinguishing pipe.
The graphite electrode has extremely high melting point, can bear larger current and is not easy to deform: graphite electrodes have the property of being able to withstand high current conditions. The softening point of copper is about 1000 ℃, and the copper is easy to deform due to heating; and the sublimation temperature of the graphite is about 3650 ℃. Lightning strike currents of between 5000 amperes and 5 kiloamperes, producing lightning strike temperatures of up to 3000 degrees. Therefore, the metal electrode is easy to deform under the action of lightning strike heavy current, generates metal powder, splashes, damages the structure of the arc extinguish chamber and influences the effect of recoil arc extinction, and the graphite electrode can effectively solve the problems.
The loss of the graphite electrode is small: the graphite electrode has the characteristic of bearing a large current condition, a polarity effect is generated under the action of lightning arcs, partial corrosion removal objects and carbon particles can be adhered to the surface of the electrode to form a protective layer, and the graphite electrode is ensured to have extremely low loss or even zero loss in the process of recoil arc extinguishing.
In the embodiment of the invention, the arc-extinguishing grids 9 are made of insulating materials, the arc-extinguishing grids 9 are arranged in a semicircular structure, the arc-extinguishing grids 9 arranged on the inner side walls of two semicircles in the sealed tube are arranged alternately, convex piers 9 are arranged between the arc-extinguishing grids 9 on the same semicircle, and the convex piers 9 on the inner side wall of one semicircle are arranged opposite to the arc-extinguishing grids 9 on the inner side wall of the other semicircle.
The arc extinguishing process of the lightning protection device is as follows,
step 1: when arc discharge is initiated in the sealed tube filled with insulating oil, the electrohydraulic effect generates shock waves which impact to the side edges. Arc discharge is initiated in the ceramic tube filled with insulating oil, part of the insulating oil in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expands to form a mechanical pressure wave which rapidly propagates outwards, but the liquid can be regarded as a shock wave transmission medium which can not be compressed, so that when the discharge channel is subjected to liquid-phase discharge, the mechanical effect of power is shown to the outside, an acting force which impacts the wall of the ceramic tube is formed in the ceramic tube, and the wall of the ceramic tube generates shock waves in the insulating oil medium due to the interaction of the forces.
Step 2: the Pascal effect enhances the liquid electric effect, when the electric arc acts on the insulating oil 2, and when a certain part of the static insulating oil 2 generates pressure intensity change, the electric arc is constantly transmitted to all directions of the inner side of the sealing pipe. When an impact electric arc acts on the metal electrode to apply pressure to the insulating oil in the ceramic tube, according to the Pascal principle, a certain part of static fluid in the closed container generates pressure change, the pressure is constantly transmitted to all directions, and then the insulating oil medium around is impacted by a larger acting force from a discharge channel in the ceramic tube, and the acting force rebounds after contacting the wall of the ceramic tube.
And step 3: because the arc extinguishing bars 9 are arranged in the sealed tube, the length of the electric arc in the sealed tube is lengthened, meanwhile, the convex piers 9 are arranged to increase the surface area of the sealed tube, the shock waves of the liquid-electricity effect and the Pascal effect return to the shock after impacting the side edge, the electric arc channel is intensively impacted and extinguished, and the arc extinguishing is completed.
The hydro-electric effect and the Pascal effect enable the pressure in the ceramic tube to be increased, the temperature to be increased, acting force pointing to the center from the wall of the ceramic tube is generated, under the acting force, the electric arc moves towards the tip of the arc-extinguishing grid, the tip lengthens the length of the electric arc, and under the condition that insulating oil blows the electric arc, the temperature of the electric arc is reduced, so that the electric arc is extinguished more quickly, the longer the electric arc formed in the ceramic tube is, the greater the acting force on the wall of the ceramic tube is, and the greater the impact force for cutting off the electric arc is, and arc extinction is completed.
Example 2:
the embodiment is different from the embodiment 1 in that more than two lightning protection devices are adopted, a plurality of lightning protection devices are fixedly connected end to end, and the bottom end of the lowest lightning protection device is grounded. The structure is completed by overlapping the structures in the embodiment 1, thereby realizing a multi-stage arc extinguishing structure and having better arc extinguishing effect.
The device is provided with a high pressure seal and an external reinforcement structure as shown in fig. 2-3.
The high-pressure sealing structure comprises a plastic sleeve 21, a stainless steel gasket 22, an O-shaped ring 23, a steel sleeve 24, sealing silica gel 25 and an extrusion fixing block 26, electrodes are nested in the sealing silica gel 25, the sealing silica gel 25 is arranged at two ends of the ceramic tube in a sealing mode, the steel sleeve 24 is fastened on the outer side of the joint of the sealing silica gel 25 and the ceramic tube, and the plastic sleeve 21 is sleeved on the outer sides of the steel sleeve 24 and the ceramic tube. A stainless steel gasket 22 is padded at the front end of the electrode and an O-ring 23 is placed between the sealing silica gel 25 and the ceramic tube contact. The extrusion fixed block 26 is arranged on the outer side of the sealing silica gel 25, a bolt hole 27 is arranged on the extrusion fixed block 26, and the bolt hole 27 is arranged in contact with the stainless steel gasket 22. The sealing silica gel 25 is set to be a T-shaped structure silica gel, and the bottom of the T-shaped structure silica gel is set to be a spherical concave structure.
The shell is made of plastic insulating materials and is used for fixing the ceramic tube; the steel sleeves are arranged at two ends of the ceramic tube to fix the end part of the ceramic tube and prevent the ceramic tube from being mechanically deformed by the generated high-strength pressure; the upper and lower electrodes are wrapped up in the silica gel that is half arc, and narrow and small space when upper and lower electrode arc extinguishing, the area is little, produces the pressure dispersion phenomenon, wraps up the electrode with the silica gel of half arc and can focus the pressure wave, and the pressure of arc extinguishing passageway improves several times, effectively blocks the electric arc. The screw generates thrust to the stainless steel gasket and the silica gel assembly, so that the stainless steel gasket and the silica gel assembly are tightly matched with the O-shaped ring and the ceramic tube, the purpose of high-pressure sealing is achieved, high-strength pressure is well prevented from leaking, and the generated high-strength pressure can be guaranteed to act on the electric arc to the maximum.
When the device is struck by lightning, a liquid-electricity effect is generated, a strong impact pressure wave is formed, and the strong impact pressure wave acts on a discharge channel in an impulse or impact pressure mode to cut off electric arcs. Meanwhile, a certain pressure is applied to the arc extinguishing liquid in the ceramic tube, and according to the Pascal principle, the pressure change of a certain part of the static fluid in the closed container is transmitted to all directions invariably, so that a larger acting force is generated on the inner wall of the ceramic tube. The action rebounds after acting on the shell to form an action force with the direction pointing to the center of the ceramic tube, so that the purposes of cutting off the electric arc, reducing the amplitude of the current, reducing the gradient of the lightning wave and prolonging the discharge time of the electric arc are achieved, the arc is effectively extinguished, the structure is simple, and the sealing performance is good.
The external reinforcing structure comprises a top cover plate 31, an insulating screw 33, a bottom cover plate 34 and an insulating cover layer 35, wherein the top cover plate 33 is arranged at the top and the bottom of the high-pressure sealing device
The sleeve cover plate 34 is arranged at the bottom of the high-pressure sealing device, the insulating screw 33 penetrates through the top sleeve cover plate 31 and the bottom sleeve cover plate 34 and is fixedly arranged, the insulating covering layer 35 is arranged on the outer side of the high-pressure sealing device, the top sleeve cover plate 31 and the bottom sleeve cover plate 34 respectively support against the extrusion fixing block 26, and meanwhile the top sleeve cover plate 31 and the bottom sleeve cover plate 34 are provided with screw holes. The fixed effect is better, and the whole arc extinguishing device can bear larger pressure.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The utility model provides a lightning protection device of electric arc is interrupted to hydroelectric effect pressure multiple spot which characterized in that: the lightning protection device is arranged to be a sealing tube, the two ends of the sealing tube are respectively provided with an upper electrode (1) and a lower electrode (6) which are arranged in a sealing mode, insulating oil (2) is arranged in the sealing tube, the side edge of the sealing tube is provided with a skirt edge (4), arc extinguishing grids (9) are arranged on the inner side edge of the sealing tube at intervals, and the transverse length of each arc extinguishing grid (9) is larger than the half inner diameter of the sealing tube.
2. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 1, wherein: the sealing tube further comprises a ceramic tube (3) and a protective shell (5), wherein the protective shell (5) is arranged on the outer side of the ceramic tube (3), and the skirt edge (4) is arranged on the outer side of the protective shell (5).
3. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 2, wherein: upper electrode (1) includes upper graphite electrode, middle metal electrode and lower floor's graphite electrode, middle metal electrode fixes the one end at ceramic pipe (3) and protecting sheathing (5), upper graphite electrode sets up the upper strata at middle metal electrode, lower floor's graphite electrode sets up the bottom at middle metal electrode, and set up in ceramic pipe (3), lower electrode (6) are including upper end graphite electrode and bottom metal electrode, the other end at ceramic pipe (3) and protecting sheathing (5) is fixed to bottom metal electrode, upper end graphite electrode sets up in ceramic pipe (3), and be connected with bottom metal electrode.
4. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 3, wherein: the lightning protection device comprises more than two lightning protection devices, wherein the lightning protection devices are fixedly connected end to end, and the bottom end of the lightning protection device at the bottom end is grounded.
5. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 1, wherein: the bottom of the upper electrode (1) is provided with an upper tip electrode (8), the upper end of the lower electrode (6) is provided with a lower tip electrode (11), the upper tip electrode (8) and the lower tip electrode (11) are vertically arranged relatively, and the upper tip electrode (8) and the lower tip electrode (11) are graphite electrodes.
6. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 5, wherein: arc extinguishing bars (9) are made by insulating material, and arc extinguishing bars (9) set up to semicircular structure, and arc extinguishing bars (9) that two semicircle inside walls set up in the sealed tube set up alternately, are provided with protruding mound (9) between arc extinguishing bars (9) on the same semicircle, and protruding mound (9) of a semicircle inside wall set up with arc extinguishing bars (9) of another semicircle inside wall relatively.
7. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 6, wherein: the arc extinguishing process of the lightning protection device is as follows,
step 1: when arc discharge is initiated in the sealed tube filled with insulating oil, shock waves towards the side edges are generated by the liquid electricity effect;
step 2: the Pascal effect enhances the liquid electric effect, when electric arcs act on the insulating oil (2), and when a certain part of the static insulating oil (2) generates pressure intensity change, the electric arcs constantly transmit the pressure intensity to all directions of the inner side of the sealing pipe;
and step 3: because be provided with arc extinguishing bars (9) in the sealed tube, electric arc is prolonged at the length of sealed tube, sets up protruding mound (9) simultaneously and increases the surface area of sealed tube, and the shock wave of liquid electricity effect and pascal effect returns after assaulting the side and assaults, concentrates to assault the arc extinguishing to the electric arc passageway, accomplishes the arc extinguishing.
8. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 7, wherein: the specific process of the step 1 is that arc discharge is initiated in the ceramic tube filled with insulating oil, part of the insulating oil in the discharge channel is instantly vaporized, decomposed and ionized into high-temperature plasma and suddenly expanded to form a mechanical pressure wave which is rapidly propagated outwards, but the liquid can be regarded as a shock wave transmission medium which can not be compressed, so that the mechanical effect of power is shown to the outside when the discharge channel carries out liquid-phase discharge, an acting force which impacts the wall of the ceramic tube is formed in the ceramic tube, and the wall of the ceramic tube generates the shock wave in the insulating oil medium due to the interaction of the force.
9. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 8, wherein: the specific process of the step 2 is as follows: when an impact electric arc acts on the metal electrode to apply pressure to the insulating oil in the ceramic tube, according to the Pascal principle, a certain part of static fluid in the closed container generates pressure change, the pressure is constantly transmitted to all directions, and then the insulating oil medium around is impacted by a larger acting force from a discharge channel in the ceramic tube, and the acting force rebounds after contacting the wall of the ceramic tube.
10. The lightning protection device for a liquid electric effect pressure multipoint interruption arc according to claim 9, wherein: the concrete process of step 3 is that the pressure in the ceramic tube is increased and the temperature is increased by the liquid electricity effect and the pascal effect, so that an acting force pointing to the center from the ceramic tube wall is generated, under the acting force, the electric arc moves towards the tip of the arc-extinguishing grid, the tip lengthens the length of the electric arc, and under the blowing of the insulating oil to the electric arc, the temperature of the electric arc is reduced, so that the electric arc is extinguished more quickly, the longer the electric arc formed in the ceramic tube is, the larger the acting force to the ceramic tube wall is, and the larger the impact force for cutting off the electric arc is, so that the arc extinction is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110910631.7A CN113594861A (en) | 2021-08-09 | 2021-08-09 | Lightning protection device for multipoint arc interruption under hydraulic effect pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110910631.7A CN113594861A (en) | 2021-08-09 | 2021-08-09 | Lightning protection device for multipoint arc interruption under hydraulic effect pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113594861A true CN113594861A (en) | 2021-11-02 |
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ID=78256631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110910631.7A Withdrawn CN113594861A (en) | 2021-08-09 | 2021-08-09 | Lightning protection device for multipoint arc interruption under hydraulic effect pressure |
Country Status (1)
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| CN (1) | CN113594861A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115548881A (en) * | 2021-04-23 | 2022-12-30 | 南宁超伏电气科技有限公司 | High-strength arc-extinguishing sealing device and arc-extinguishing method |
-
2021
- 2021-08-09 CN CN202110910631.7A patent/CN113594861A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115548881A (en) * | 2021-04-23 | 2022-12-30 | 南宁超伏电气科技有限公司 | High-strength arc-extinguishing sealing device and arc-extinguishing method |
| CN115548881B (en) * | 2021-04-23 | 2024-04-19 | 南宁超伏电气科技有限公司 | Sealing device for high-strength arc extinction and arc extinction method |
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Application publication date: 20211102 |
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