CN219086457U - Multi-gap liquid-electricity effect arc extinguishing device - Google Patents

Abstract

The utility model provides a many clearances liquid electric effect arc extinguishing device belongs to lightning protection arc extinguishing technical field, and the device includes plastic cover, metal pad structure, metal cover, insulating tube, clearance electrode, liquid medium, guide electrode and silica gel, and the metal pad structure sets up the both ends at the insulating tube, and the one end and the metal pad structural connection of guide electrode, the guide electrode stretches into in the insulating tube, and the both ends at the insulating tube are established to the metal cover. The utility model discloses every gap layer is even electric field, and breakdown field intensity is high, can reduce arc extinguishing insulating tube length, and every gap layer all has the liquid electric effect, and the arc extinguishing ability is strong, and the condition of power frequency voltage reburning is to break down every even electric field in above-mentioned all gaps and go on, and breakdown voltage is high and hardly reburning, and even electric field volt second characteristic is mild between the board, realizes insulating cooperation with electrical equipment easily, and short electric arc receives cold cathode influence, and electric arc temperature is low and the diameter is little, and electric arc fragile easily breaks off, and short electric arc carries's energy is few.

Description

Multi-gap liquid-electricity effect arc extinguishing device

Technical Field

The utility model relates to a lightning protection arc extinguishing technical field especially relates to a many clearances liquid electric effect arc extinguishing device.

Background

When the current arc extinguishing lightning protection device receives lightning stroke, because the arc extinguishing process can produce transient state high energy and strike, the high strength pressure of hundreds of megapascals that the arc extinction produced acts on the arc extinguishing cylinder, takes place mechanical deformation, leads to whole arc extinguishing device to explode to split, and the arc extinguishing lightning protection effect that reaches is not ideal. Therefore, it is necessary to design a device that can extinguish the arc and prevent the explosion of the arc-extinguishing device, thereby improving the service life and realizing a reusable arc-extinguishing device.

Practical content

An object of the utility model is to provide a many clearances liquid electric effect arc extinguishing device, solve the technical problem who mentions among the background art. The purpose is when realizing the quick extinction of long electric arc, improves the security of device, prevents that arc extinction lightning protection device from being destroyed, improves the stability and the reliability of arc extinction, realizes effective arc extinction. The long electric arc is divided into a plurality of short electric arcs through the metal gap electrode embedded in the recoil pipe, so that the intensity of the liquid electric effect is controlled, and the damage to the structure of the device is avoided while the arc is reliably extinguished.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a many clearances liquid electric effect arc extinguishing device, including plastic sleeve, metal pad structure, the metal sleeve, the insulating tube, the clearance electrode, liquid medium, guide electrode and silica gel, the metal pad structure sets up the both ends at the insulating tube, the one end and the metal pad structural connection of guide electrode, the guide electrode stretches into in the insulating tube, the metal sleeve cover is established at the both ends of insulating tube to contact with the metal pad structure and set up, the intussuseption of metal sleeve is filled with the both ends of silica gel sealed insulating tube, a plurality of clearance electrode interval sets up in the insulating tube, the intussuseption of insulating tube is filled with liquid medium, the plastic sleeve parcel is in the outside of insulating tube and metal sleeve.

Further, the metal pad structure is arranged as a circular plate electrode or a spherical electrode, a through hole is arranged on the circular plate electrode, and the metal pad structure and the inner wall of the insulating tube are embedded.

Further, the outside of both ends of insulating tube is provided with buckle mound, and the metal sheath cutting ferrule is in the outside of buckle mound.

Further, the contact part of the silica gel and the insulating tube is provided with an O-shaped ring, and the silica gel sleeved in the insulating tube is of an inward arc-shaped structure.

Further, an elastic layer is arranged on the inner side wall of the insulating tube, and the elastic layer is a rubber layer.

The utility model has the following beneficial effects due to the adoption of the technical scheme:

the utility model discloses every gap layer is even electric field, breakdown field intensity is high, can reduce arc extinguishing insulating tube length, every gap layer all has the liquid electric effect, the arc extinguishing ability is strong, the condition of power frequency voltage reburning is to break down every even electric field in above-mentioned all gaps and go on, breakdown voltage is high and hardly reburning, even electric field volt second characteristic is mild between the board, easy and electrical equipment realizes insulating cooperation, the cold cathode influence is received to short electric arc, electric arc temperature is low and the diameter is little, electric arc fragile is easy to be cut off, the energy that short electric arc carried is few, liquid electric effect is under the prerequisite that satisfies the weak electric arc of interruption, liquid electric effect pressure has been reduced, ensure the integrality of structure.

Drawings

FIG. 1 is a schematic view of a first construction of the present utility device;

FIG. 2 is a schematic view of a second construction of the present utility model;

fig. 3 is a schematic view of a third structure of the present utility model.

In the attached drawings, a plastic sleeve is 1; a 2-metal pad structure; a 3-O-ring; 4-metal sleeve; 5-insulating tube; 6-gap electrode; 7-a liquid medium; 8-conducting electrodes; 9-silica gel; 10-screws; 11-convex edge; 12-snap-fit abutment.

Detailed Description

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

As shown in fig. 1, the multi-gap liquid-electric effect arc extinguishing device comprises a plastic sleeve 1, a metal pad structure 2, a metal sleeve 4, an insulating tube 5, a gap electrode 6, a liquid medium 7, a conductive electrode 8 and silica gel 9, wherein the metal pad structure 2 is arranged at two ends of the insulating tube 5, one end of the conductive electrode 8 is connected with the metal pad structure 2, the conductive electrode 8 stretches into the insulating tube 5, the metal sleeve 4 is sleeved at two ends of the insulating tube 5 and is in contact with the metal pad structure 2, the metal sleeve 4 is filled with the silica gel 9 to seal two ends of the insulating tube 5, a plurality of gap electrodes 6 are arranged in the insulating tube 5 at intervals, the insulating tube 5 is filled with the liquid medium 7, and the plastic sleeve 1 is wrapped outside the insulating tube 5 and the metal sleeve 4. The insulating tube is made of epoxy resin, nylon glass fiber or PC material, and can also be an insulating tube.

The insulating tube filled with arc extinguishing liquid is made of inorganic nonmetallic materials with high hardness, high temperature resistance and high pressure resistance and is cylindrical; the shell is made of plastic insulating materials, and the purpose is to fix the insulating tube; the steel sleeves are arranged at two ends of the insulating tube, the end parts of the insulating tube are fixed, and the insulating tube is prevented from being mechanically deformed by high-strength pressure; the upper electrode and the lower electrode are wrapped by the semi-arc silica gel, the area is small in a narrow space when the upper electrode and the lower electrode arc extinction, a pressure dispersion phenomenon is generated, the pressure wave can be focused by wrapping the electrodes by the semi-arc silica gel, the pressure of an arc extinction channel is improved by a plurality of times, and the arc is effectively interrupted. The screw produces thrust to the stainless steel washer and silica gel combination, makes it and O type ring, insulating tube close fit, reaches high pressure seal's purpose, has prevented well that high strength pressure from leaking outward, can guarantee that the high strength pressure maximize that produces acts on the electric arc. A plurality of parallel metal electrode plates divide the insulating tube into a plurality of gap layers, and each gap layer is filled with arc extinguishing liquid. The metal electrode plate is integrated with the insulating tube through injection molding, and small holes are reserved on the electrode plate, so that the pressure intensity of the gap layer is balanced on one hand, and a channel for arc extinguishing liquid is filled on the other hand.

The arc extinguishing time is early, and the pressure peak value of the arc extinguishing gas can be generated in the pre-breakdown stage of the impact Lei Dianhu and acts on the power frequency arc in the initial stage of arc establishment to form the asymmetric arc extinguishing pressure advantage. The high pressure of the quenching gas, accompanied by the "electrohydraulic" and "pascal" effects of the arc discharge in the liquid, can produce quenching pressures, the pressure values being dependent on the arc diameter and the temperature. The arc diameter is controlled by reducing the gap distance to form a cold cathode effect and reducing the arc thermal ionization degree, and the pressure values generated by the liquid electricity effect and the Pascal effect are properly reduced, so that arc extinction is realized, and the damage to an arc extinction structure caused by overlarge pressure can be prevented.

The afterburning inhibition capability is strong, a uniform electric field is constructed by a short gap, the afterburning intensity of the medium is improved by about 6 times, meanwhile, the free travel of the medium is shortened by huge pressure generated by the ' hydraulic and electric ' pascal ' effect, and the afterburning breakdown field intensity of the medium is also improved.

When the device is struck by lightning, a liquid electric effect is generated, a strong impact pressure wave is formed, and the strong impact pressure wave acts on the discharge channel in an impulse or impact pressure mode to intercept an electric arc. Meanwhile, a certain pressure is applied to the arc extinguishing liquid in the insulating tube, and according to the Pascal principle, the pressure change of a certain part of static fluid in the closed container can be transmitted to all directions unchanged, so that larger acting force can be generated on the inner wall of the insulating tube. The acting force acts on the shell to generate rebound, so that acting force with the direction pointing to the center of the insulating tube is formed, and the purposes of cutting off the electric arc, reducing the amplitude of current, reducing the steepness of lightning wave and prolonging the discharge time of the electric arc are achieved. According to the multi-gap liquid-electricity effect arc extinguishing method, the length of an arc is reduced through the plurality of metal electrode plates embedded in the recoil tube, the long arc is divided into the plurality of short arcs, the liquid-electricity effect arc extinguishing is utilized at each gap layer, the liquid-electricity effect intensity is controlled, the device is prevented from being damaged when the rapid extinguishing of the long arc is realized, and the arc extinguishing is stable and reliable.

In this embodiment, the metal pad structure 2 is set to a circular plate electrode or a spherical electrode, a through hole is provided on the circular plate electrode, and the metal pad structure 2 and the inner wall of the insulating tube 5 are embedded. As shown in fig. 1, the inside is provided with a circular plate electrode, no circular hole is arranged in the middle, at this time, the liquid medium 7 needs to be poured when the insulating tube 5 is manufactured, as shown in fig. 3, the metal pad structure 2 is provided with a spherical electrode, and the liquid medium 7 needs to be poured at the beginning, but if the metal pad structure is provided with the structure shown in fig. 2, a through hole is formed in the spherical electrode, then the liquid medium 7 can be poured in each gap in the later stage to achieve liquid balance, and meanwhile, the pressure of each gap reaches balance after the working is finished.

When the device is used in the aspect of gap arc extinction, the liquid medium can be in a weak conductive state, and if the device is used in the aspect of a lightning arrester or a lightning rod, the liquid medium is in a state of near insulation, and the resistance must reach tens of megaohms. Among them, insulating oil is most preferable. Such as transformer oil, breaker oil, capacitor oil, cable oil, etc.

In this embodiment, as shown in fig. 1, the two outer sides of the two ends of the insulating tube 5 are provided with a protruding pier 12 of the buckle, and the metal sleeve 4 is sleeved on the outer side of the protruding pier 12 of the buckle. The snap-on stud 12 is intended to make the metal sleeve 4 more tightly locked, without loosening when the hydro-electric effect occurs.

In the embodiment of the utility model, the contact department of silica gel 9 and insulating tube 5 is provided with O type ring 3, and the silica gel 9 of cover inside insulating tube 5 sets up to inwards arc structure. The O-shaped ring 3 is arranged for better sealing effect, then an inward arc-shaped structure is arranged, pressure which is applied to two ends by the hydro-electric effect is dispersed to the whole silica gel 9, and the dispersion of the pressure is realized to the outer surface.

In this embodiment, be provided with the elastic layer on the inside wall of insulating tube 5, the elastic layer is the rubber layer. The elastic layer can be a rubber layer, reduces intraductal pressure, and the elastic material of elastic layer that sets up in insulating intraductal has little pit at its surface, increases the atress area of insulating intraductal wall, also improves the roughness on surface simultaneously, because satisfy the relation between pressure and the area and be: p=f/S, i.e. the force area is inversely proportional to the pressure.

When lightning strikes, the electric arc is conducted from the metal sleeve 4 at one end to the liquid medium 7 in the insulating tube 5 through the conducting electrode 8, the liquid electric effect is generated, the superposition effect of the reflected shock wave and the Pascal effect are generated, the shock wave is formed, the shock wave acts on the discharge channel in a pulse or impact pressure mode, rebound occurs on the inner wall of the insulating tube 5, the acting force directed to the center of the insulating tube is formed, the electric arc is cut off, the amplitude of the current is reduced, the steepness of the lightning wave is reduced, the discharge time of the electric arc is prolonged, the conducting electric arc is divided into a plurality of gap electric arcs by the gap electrode 6, the liquid electric effect is utilized to extinguish the arc between the gap electrode 6 and the gap electrode 6, the strength of the liquid electric effect is controlled, and the device is prevented from being damaged while the rapid extinction of the long electric arc is realized.

The electrohydraulic effect produces a shock wave: the arc discharge is initiated in the insulating tube filled with arc extinguishing liquid, and part of the liquid in the discharge channel is instantaneously vaporized, decomposed and ionized into high-temperature plasma to be suddenly expanded, so that a mechanical pressure wave which rapidly propagates outwards is formed. However, since the liquid can be regarded as a shock wave transmission medium which is not compressed by itself, the liquid phase discharge channel has a mechanical effect of ultra-high power to the outside. The force striking the insulating tube wall is formed in the insulating tube, and due to the force interaction, the insulating tube wall generates a strong shock wave in the medium, which acts on the discharge channel in the form of impulse or impact pressure, striking the arc and cutting it off.

The pascal effect further enhances the hydro-electric effect, and when an impact arc acts on the metal electrode, a certain pressure is applied to the liquid in the insulating tube. According to the pascal principle, a pressure change occurring in a certain part of the stationary fluid in the closed container will be transferred in all directions with a constant magnitude. The discharge channel in the insulating tube starts to impact the surrounding medium with larger acting force, and the acting force bounces after striking the insulating tube wall to form acting force with the direction pointing to the center of the insulating tube, so that the impact pressure generated in the hydro-electric effect is further enhanced, and the purpose of cutting off the electric arc is achieved.

When the arc extinguishing lightning protection device receives the lightning, a liquid-electricity effect is generated, a strong impact pressure wave is formed, the strong impact pressure wave acts on the discharge channel in an impulse or impact pressure mode, and the electric arc is cut off. Meanwhile, a certain pressure is applied to the arc extinguishing liquid in the insulating tube, and according to the Pascal principle, the pressure change of a certain part of static fluid in the closed container can be transmitted to all directions unchanged, so that larger acting force can be generated on the inner wall of the insulating tube. The acting force acts on the shell to generate rebound, so that acting force with the direction pointing to the center of the insulating tube is formed, and the purposes of cutting off the electric arc, reducing the amplitude of current, reducing the steepness of lightning wave and prolonging the discharge time of the electric arc are achieved.

According to the multi-gap liquid electric effect arc extinguishing method, the length of an arc is reduced through the metal electrode plate embedded in the recoil tube, the long arc is divided into a plurality of short arcs, the liquid electric effect arc extinguishing is carried out on each gap layer, the liquid electric effect intensity is controlled, the device is prevented from being burst and damaged when the rapid extinction of the long arc is realized, and the arc extinguishing is stable, reliable and effective.

The liquid medium 7 is emulsion mixed liquid of oil and water or insulating oil, the oil is wrapped by water, the oil particle surface is connected into a whole by water to form a complete water medium discharge channel, the breakdown characteristic of single pure water medium is reserved, in the process of discharging the electric arc along the water medium, electric arc plasma is subjected to incompressibility restriction generated by wrapping of the insulating oil, pressure intensity and damping shock wave conduction pressure intensity are generated, the liquid cannot be deformed and displaced instantaneously due to short lightning arc impact time, the mixed liquid can be regarded as shock wave transmission medium which cannot be compressed by itself at the moment, the mixed liquid is more difficult to compress than a medium which is common single liquid, the mixed liquid is higher in viscosity and higher in surface tension, so that the force of the emulsion mixed liquid in the original state can be increased, under the pressure effect generated by the electric arc space occupation breakdown mixed liquid, the pressure intensity of hundreds of megapascals is synchronously generated on the contact surface of the electric arc and the emulsion mixed liquid, the pressure intensity of the hundreds of megapascals is synchronously counteracted and the electric arc is eliminated, the incompressibility of the high-viscosity mixed liquid is ensured, meanwhile, the high-viscosity liquid can absorb more shock wave transmission medium can be more compressed, the pressure intensity is reduced, and the damping shock wave is durable to the damping structure is improved.

In the process of dielectric oil breakdown by the hydraulic electric effect impact arc under the condition of dielectric oil, the volume occupation requirement is set for the dielectric oil in a very short time, because the viscosity of the dielectric oil is high, the displacement is not enough to yield the space occupied by the arc in a very short time, the strong countermeasure of the space position is formed between the occupation of the arc and the displacement of the dielectric oil, thereby the mechanical pressure peak shock wave of hundred megapascals is generated, the shock wave is reacted to the power frequency arc body, and the factors for improving the pressure peak value of the hydraulic electric effect shock wave and reducing the time of the pressure peak value of the hydraulic electric effect comprise: the insulation strength can improve the breakdown field strength, and meanwhile, a high field strength extremely fast electron collapse process is formed, so that the arc breakdown speed is improved, the sudden performance of the space occupation of an arc is increased, the space abdication speed is reduced due to the high viscosity of the insulating oil, a large amount of arc heat can be absorbed by the high specific heat capacity, and the arc temperature is reduced.

The elastic layer also reflects fundamental waves of the hydro-electric effect, so that the fundamental waves act on the electric arc channel, the electric arc is more easy to extinguish, the instant pressure born by the pipe wall is reduced, and the explosion of the insulating pipe is avoided.

The specific process of the superposition effect of the reflected shock waves is as follows: the shock wave and the reflected shock wave meet and overlap, the interference phenomenon occurs, the energy of vibration enhanced vibration is increased, when the electric arc enters an arc extinguishing channel containing emulsion mixed liquid, the temperature of plasma generated by liquid phase discharge is up to 1500-3000K, high temperature and high pressure generated in the channel cannot leak outwards in time, the shock wave is reflected back and forth on the inner wall surface of the arc extinguishing channel, and the reflected waves of the inner wall surface overlap each other, so that the overpressure peak value is increased.

If the emulsifier is an ionic surfactant, on the interface, the emulsion droplets are charged due to ionization and adsorption, and the charge size depends on ionization intensity; the non-ionic surfactant has friction effect to make the liquid drop have charge, and its charge size is related to the concentration of external phase ion, dielectric constant and friction constant, when the charged liquid drop is close to it, it produces repulsive force to make it difficult to coalesce, so that it can raise emulsion stability, and the charged liquid drop of emulsion can form electric double layer structure on two sides of interface, and the repulsive effect of electric double layer can produce great mechanical effect, and can produce reflective impact pressure in the interior of insulating tube to act on electric arc.

The specific process of generating the pascal effect is: the pressure change of a certain part of static fluid in the sealed tube structure is transmitted to all directions unchanged, and then the liquid medium around is impacted by larger acting force from a discharge channel in the insulated tube, the acting force bounces after striking against the wall of the insulated tube, the acting force with the direction pointing to the center of the insulated tube is formed, the impact pressure and the occupied pressure peak value are generated in the hydro-electric effect, the dual pressure sources are amplified together, the electric arc is intercepted, the longer the electric arc in the insulated tube is, the larger the acting force on the wall of the insulated tube is, and the larger the impact pressure for intercepting the electric arc is, so that the secondary reburning of the electric arc is prevented.

The elastic layer is arranged in the insulating tube 5, the stress area is increased by the elastic layer, the pressure intensity in the tube is reduced, the elastic material of the elastic layer arranged in the insulating tube is provided with small pits on the surface of the elastic material, the stress area of the inner wall of the insulating tube is increased, and meanwhile, the roughness of the surface is improved, and the pressure and the area satisfy the following relations: p=f/S, i.e. the inverse ratio between the stress area and the pressure, after the elastic layer is added in the insulating tube 5 of the sealed tube structure, the maximum pressure in the insulating tube 5 of the sealed tube structure is lower than before the elastic material is not added under the action of arc impact, so that the condition of explosion of the insulating tube caused by the excessive pressure in the tube is avoided.

Meanwhile, the impact force generated by Pascal effect is avoided to directly impact the insulating tube, impact force is firstly formed on the elastic insulating material by the impact wave in the tube, the reaction force acting on the inner surface of the insulating tube is reduced, and the insulating tube with smaller hardness is prevented from being broken due to the impact of the reaction force.

The hydro-electric effect insulating oil liquid electric effect arc extinguishing process under the insulating oil condition comprises the following steps: an insulating oil breakdown process, a hydro-electric effect process, an arc extinguishing process and a re-ignition suppressing process. The high viscosity, the high specific heat capacity and the high medium strength of the insulating oil affect the peak value and the peak value time of the hydro-electric effect pressure; the influence of the pressure peak value and the peak value time on the arc extinction threshold value and the arc extinction time; the effect of the sealing structure on the pressure peak and the peak time.

1. The reduction of the time of the pressure peak of the liquid-electricity effect reduces the time of the arc-extinguishing effect, forms early intervention of arc extinction and is beneficial to forming a strong arc-extinguishing situation.

2. And the extinction threshold can be improved by improving the pressure peak value of the hydro-electric effect. An asymmetric situation is formed in which the arc extinction pressure is far greater than the arc breaking resistance pressure, so that the arc extinction threshold is improved.

3. Compared with water, the insulating oil breakdown field intensity is high, which is favorable for improving the pressure peak value of the liquid electric effect and reducing the time of the pressure peak value: the insulating oil has much higher insulating strength and breakdown field strength than air and water, and under the same gap distance, the breakdown voltage and the bursting property of the breakdown process are improved, and the bursting property of the current can be increased by improving the breakdown voltage. The steady-state value of the current after breakdown is increased along with the increase of the breakdown voltage, so that the current change rate is increased, and the pressure peak value of the liquid-electric effect proportional to the current change rate is also increased. The improvement of the current change rate also correspondingly improves the climbing speed of the hydraulic-electric effect pressure intensity, thereby reducing the peak time of the hydraulic-electric effect pressure intensity.

4. The high viscosity of the insulating oil compared with water is beneficial to improving the time of the hydraulic effect pressure peak value and the male building pressure peak value. The viscosity of the insulating oil is high, the bonding force between molecules is inevitably increased, the space occupation difficulty of the electric arc is increased along with the increase of the space occupation difficulty of the electric arc in the arc breakdown process, the pressure required by the space occupation realization in the process of extruding the insulating oil by the electric arc is increased, the pressure applied to the insulating oil by the electric arc is increased, and the arc extinguishing pressure of the reaction of the insulating oil to the electric arc is also increased. Because the sensitivity of the insulating oil with high viscosity property for resisting the occupation of the breakdown arc volume is increased, under the condition of extremely small breakdown current, extremely high hydraulic effect pressure can be generated for resisting the occupation of the small arc volume, so that the time of the pressure peak of the hydraulic effect pressure is reduced, and the pressure peak is improved.

5. Compared with water, the insulating oil has higher stability: the insulating oil is an organic high polymer material, is not easy to decompose, gasify and age, has more stable physical and chemical properties, and meets the requirements of repeated arc extinction and maintenance-free arc extinction.

6. Insulating oil has a higher specific heat capacity than water: the specific heat capacity of the insulating oil is high, so that a large amount of arc temperature can be absorbed, the arc is cooled, and the vulnerability and the easy-to-extinguish performance of the arc are improved;

7. compared with water, the insulating oil has better medium strength recovery property: after the liquid electric effect breaks the electric arc, the electric arc fracture is filled with insulating oil, and the breakdown field strength of the insulating oil is higher than that of water, so that the reburning resistance is improved.

8. Compared with water, the dielectric oil electric effect extinction threshold is larger: through the characteristics that insulating oil liquid electric effect pressure has higher sensitivity, the arc extinction start time is advanced, and the higher expected current can be extinguished in the initial arc establishing section, thereby meeting the 40kA full-scale power frequency short circuit current arc extinction requirement.

9. Compared with water, the electric effect arc extinguishing speed of the insulating oil is as high as possible: the arc extinction by the electric effect of the insulating oil liquid has higher arc extinction sensitivity, so that the arc extinction time is advanced. The time for extinguishing the 40kA full-scale short-circuit current is tens to hundreds of microseconds, which is less than the relay protection outlet response time of tens of milliseconds, and the requirement for extinguishing the 40kA full-scale power frequency short-circuit current before the relay protection response time is met.

10. The application range is wide: the electric effect of the insulating oil liquid reduces the time of the pressure peak value of the arc extinguishing shock wave, improves three dimensions of the pressure peak value of the arc extinguishing shock wave and the medium recovery strength, improves the arc extinguishing threshold value, reduces the arc extinguishing time and provides a new method for solving the lightning trip. Is suitable for arc extinction requirements of 10kV, 35kV, 110kV, 220kV, 500kV, 800kV and 1000kV voltage levels.

11. Insulation fit for each voltage class: the insulation fit requirement under any voltage level can be realized by controlling the length of the liquid electric effect arc extinguishing section and the length of the air gap.

12. Compared with water and valve plates, the insulating oil liquid electric effect arc extinction is quicker, the time lag effect existing in the valve plates is avoided, the pressure peak value is lower, the pressure peak value time lag and the medium recovery strength are low due to low viscosity and low breakdown field intensity in the process of the water medium liquid electric effect, the arc extinction time is long and the insulating oil liquid electric effect is easy to burn again to generate larger heating value, the result that the structure is damaged due to the gasification and decomposition of the water is triggered, and the safety and durability of the insulating oil liquid electric effect lightning protection are improved.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (5)

1. A multi-gap liquid electric effect arc extinguishing device is characterized in that: including plastic sleeve (1), metal pad structure (2), metal sleeve (4), insulating tube (5), clearance electrode (6), liquid medium (7), conducting electrode (8) and silica gel (9), metal pad structure (2) set up the both ends at insulating tube (5), the one end and the metal pad structure (2) of conducting electrode (8) are connected, in conducting electrode (8) stretched into insulating tube (5), metal sleeve (4) cover is established at the both ends of insulating tube (5) to contact with metal pad structure (2) and set up, metal sleeve (4) intussuseption is filled with the both ends of silica gel (9) sealed insulating tube (5), a plurality of clearance electrode (6) interval sets up in insulating tube (5), insulating tube (5) intussuseption is filled with liquid medium (7), plastic sleeve (1) parcel is in the outside of insulating tube (5) and metal sleeve (4).

2. The multi-gap electrohydraulic effect arc extinguishing device according to claim 1, wherein: the metal pad structure (2) is arranged as a circular plate electrode or a spherical electrode, a through hole is arranged on the circular plate electrode, and the metal pad structure (2) and the inner wall of the insulating tube (5) are embedded.

3. The multi-gap electrohydraulic effect arc extinguishing device according to claim 1, wherein: the outer sides of the two ends of the insulating tube (5) are provided with buckling convex piers (12), and the metal sleeve (4) is clamped and sleeved on the outer sides of the buckling convex piers (12).

4. The multi-gap electrohydraulic effect arc extinguishing device according to claim 1, wherein: the contact part of the silica gel (9) and the insulating tube (5) is provided with an O-shaped ring (3), and the silica gel (9) sleeved inside the insulating tube (5) is of an inward arc-shaped structure.

5. The multi-gap electrohydraulic effect arc extinguishing device according to claim 1, wherein: an elastic layer is arranged on the inner side wall of the insulating tube (5), and the elastic layer is a rubber layer.

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