CN114628998A - Liquid valve plate, valve plate device, arc extinguishing method and application - Google Patents
Liquid valve plate, valve plate device, arc extinguishing method and application Download PDFInfo
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- CN114628998A CN114628998A CN202210417907.2A CN202210417907A CN114628998A CN 114628998 A CN114628998 A CN 114628998A CN 202210417907 A CN202210417907 A CN 202210417907A CN 114628998 A CN114628998 A CN 114628998A
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- 230000015556 catabolic process Effects 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000000839 emulsion Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
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- 229910000831 Steel Inorganic materials 0.000 abstract description 9
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- 208000025274 Lightning injury Diseases 0.000 abstract description 4
- 238000009825 accumulation Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Breakers (AREA)
- Insulators (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a liquid valve plate, a valve plate device, an arc extinguishing method and application, and belongs to the technical field of lightning protection and arc extinguishing. Under the condition of lightning stroke, a uniform electric field is formed between the steel plates, the volt-second characteristic is gentle, the current gradient is reduced, the steel plates can be in insulation fit with equipment such as cables and transformers, a liquid medium replaces a solid valve plate, the steel plates are safe and clean, carbon emission can be effectively reduced, a multi-stage defense line for attenuating impact current is formed, residual pressure can be effectively reduced, heat accumulation is avoided, and explosion is caused.
Description
Technical Field
The invention relates to the technical field of lightning protection and arc extinction, in particular to a liquid valve plate, a valve plate device, an arc extinction method and application.
Background
The national standard AC gapless metal oxide arrester stipulates that the standard heat dissipation time of the arrester is 60s, and the interval time of multiple lightning strokes is 30 ms. The lightning arrester is characterized in that a non-linear resistor of a valve plate inside the lightning arrester is converted from a high-resistance state to a low-resistance state, so that lightning current flows through the inside of the lightning arrester and is led into the ground, and the potential difference between two ends of an insulator is reduced. However, the resistance value of the lightning arrester is changed, so that the time lag effect exists, and the residual voltage is easily exceeded under the condition of multiple lightning strokes. The special structure of the lightning arrester needs to have excellent sealing performance, so when huge lightning energy is accumulated in the lightning arrester, the closed structure influences the smoothness of heat release, the skin effect is added to cause the current distribution in the valve plate to be uneven, and the internal thermal breakdown of the lightning arrester is directly caused. The lightning arrester after thermal breakdown forms a short-circuit point, causes the transmission line fault, increases the difficulty of removing the line fault and greatly increases the cost of operation and maintenance.
Disclosure of Invention
The invention aims to provide a liquid valve plate, a valve plate device, an arc extinguishing method and application, and solves the technical problems of low impact current resistant current of the whole lightning arrester and high residue caused by time lag effect of the valve plate due to heating caused by heat superposition of a plurality of valve plates and a heat insulation process of the existing valve plate. The solid valve plate is replaced by a liquid material, and the electric arc is quickly extinguished by utilizing the liquid-electric effect. The heat accumulation on the solid valve plate is avoided, and finally the internal thermal breakdown of the lightning arrester is caused.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a liquid valve block, includes insulating tube, liquid medium, insulating housing and metal sheet, and the metal sheet is sealed to be set up at the both ends of insulating tube, and liquid medium sets up in the insulating tube, and insulating housing wraps up in the outside of insulating tube.
Furthermore, a liquid filling opening is formed in the metal plate, a sealing bolt is arranged on the liquid filling opening for sealing, and a sealing ring of the liquid filling opening is arranged on the side edge of the sealing bolt.
Further, an elastic layer is arranged on the inner side wall of the insulating pipe, and the elastic layer is arranged between the inner side wall of the insulating pipe and the liquid medium.
Further, the shell of insulating tube is provided with a plurality of chimb, and the interval sets up between the chimb, and chimb and insulating tube are integrative to be set up.
The utility model provides a plastic housing parcel is provided with in all liquid valve block outsides, the end to end setting between liquid valve block and the liquid valve block of liquid valve block device more than two. The outer side of the plastic shell is provided with a skirt edge.
A method for extinguishing arc of liquid valve plate includes forming discharge channel on liquid medium when lightning arc passes through liquid medium from metal plate at one side of liquid valve plate and out from metal plate at another side to generate liquid-electricity effect, reflected shock wave superposition effect and Pascal effect to form shock wave, acting on discharge channel in impulse or shock pressure mode, acting on inner wall of sealed insulating tube body, then rebounding to form acting force with direction pointing to center of tube to cut off arc.
Furthermore, the liquid medium adopts emulsified mixed liquid of oil and water or insulating oil, the oil is wrapped in after being cut by water, the outer surfaces of oil particles are connected into a piece through water to form a complete water medium discharge channel, the breakdown characteristic of the single pure water medium is kept, in the process of electric arc discharge along the water medium, electric arc plasma is restricted by incompressibility generated by wrapping of the insulating oil to generate pressure intensity and attenuation shock wave conduction pressure intensity, the liquid cannot instantaneously deform and displace due to short lightning arc impact time, the mixed liquid can be regarded as the shock wave transmission medium which cannot be compressed per se at the moment, compared with the common single liquid, the medium which is more difficult to compress is higher in viscosity and higher in surface tension, the force of the emulsified mixed liquid maintaining the original state per se can be increased, and under the pressure effect generated by electric arc breakdown of the mixed liquid, hundreds of megapascal pressure intensity can be generated at the contact surface of the electric arc and the emulsified mixed liquid at the same time, the hundred-megapascal synchronous pressure counteracts the electric arc and interrupts the electric arc, so that the occupation of the electric arc is eliminated, the incompressibility of the high-viscosity mixed liquid is ensured, meanwhile, the high-viscosity liquid can absorb more energy of conduction shock waves, the pressure intensity is attenuated, the impact force on a backflushing arc extinguishing structure is reduced, and the reliability and the durability of the structure are improved.
In the process of breaking down insulating oil by an electrohydraulic effect impact electric arc under the condition of insulating oil, the volume occupation requirement of the electric arc on the insulating oil is provided in a very short time, the viscosity of the insulating oil is high, the electric arc occupation space is given out in a very short time without reaching displacement, and the strong opposition of the electric arc occupation and the space position given out by the insulating oil without reaching displacement is formed, so that a hundred-megapascal mechanical pressure peak shock wave is generated, the shock wave is reversely acted on a power frequency electric arc body, and the factors for improving the electrohydraulic effect shock wave pressure peak value and simultaneously reducing the electrohydraulic effect pressure peak value time comprise: when dielectric strength can improve the breakdown field intensity, form the very fast electron of high field intensity and collapse the process, improve electric arc breakdown speed from this, increase the proruption of electric arc space occupation, insulating oil high viscosity slows down the space speed of stepping down, and a large amount of electric arc heats can be absorbed to high specific heat capacity, reduce the electric arc temperature.
Further, the specific process of reflecting the shock wave superposition effect is as follows:
the shock wave and the reflected shock wave are overlapped to generate an interference phenomenon, so that the energy of vibration reinforced vibration is increased, when the electric arc enters an arc extinguishing channel containing emulsified mixed liquid, the temperature of plasma generated by liquid phase discharge reaches 1500-3000K, high temperature and high pressure generated in the channel cannot be leaked 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 on the inner wall surface are overlapped to increase an overpressure peak value.
If the emulsifier is ionic surfactant, the ionization also has adsorption effect on the interface, so that the droplets of the emulsion have charges, and the charge is determined by the ionization strength; for the nonionic surfactant, the adsorption has a friction effect, so that the liquid drops are charged, the charge size of the liquid drops is related to the concentration of external phase ions, the dielectric constant and the friction constant, when the charged liquid drops approach, repulsive force is generated, so that the charged liquid drops are difficult to coalesce, the stability of the emulsion is improved, the charged liquid drops of the emulsion form an electric double layer structure on two sides of an interface, and the repulsive effect of the electric double layer generates a great geomechanics effect, so that the reflection impact pressure is generated in the insulating tube to act on electric arcs.
Further, the concrete process of generating the pascal effect is as follows: the pressure change of a certain part of static fluid in the sealing tube structure is transmitted to all directions unchanged, then the liquid medium around is impacted by a larger acting force from a discharge channel in the insulating tube, the acting force rebounds after touching the insulating tube wall to form an acting force with the direction pointing to the center of the insulating tube, the impact pressure and the occupied pressure peak value are generated in the enhanced liquid electric effect, the double pressure sources are jointly acted by the amplifying force to cut off the electric arc, the longer the electric arc in the insulating tube is, the larger the acting force on the insulating tube wall is, the larger the impact pressure of the electric arc is cut off in reverse, and the secondary reburning of the electric arc is prevented.
Be provided with the elastic layer in the insulating tube body of sealing tube structure, elastic layer increase lifting surface area reduces intraductal pressure, and the elastic material who sets up the elastic layer in the insulating tube has the pit on its surface, and the lifting surface area of increase insulating tube inner wall also improves the roughness on surface simultaneously, because satisfy the relation between pressure and the area and be: the pressure is increased, after the elastic layer is added in the insulating tube body of the sealing tube structure, the maximum pressure in the insulating tube body is lower than that before the elastic material is not added under the action of electric arc impact, and the situation that the insulating tube explodes due to overlarge pressure in the insulating tube is avoided.
Meanwhile, the insulating tube is prevented from being directly impacted by the acting force generated by the Pascal effect, the impact wave in the tube firstly forms the impact acting force on the elastic insulating material, the reaction force acting on the inner surface of the insulating tube is reduced, and the insulating tube with lower hardness is prevented from being broken due to the direct impact of the reaction force.
The application of the liquid valve block is applied to a lightning arrester, an arc extinguishing insulator and an arc extinguishing gap device.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
under the condition of lightning strike, a uniform electric field is formed between the steel plates, the volt-second characteristic is gentle, the current gradient is reduced, the steel plates can be in insulation fit with equipment such as cables and transformers, a liquid medium replaces a solid valve plate, the steel plates are safe and clean, carbon emission can be effectively reduced, a multi-stage defense line for attenuating impact current is formed, residual voltage can be effectively reduced, heat accumulation and explosion are avoided, the overall safety level of the insulator is improved, the attenuation effect of the liquid valve plate on the impact arc intensity reduces the impact amplitude of natural lightning current through the conversion capability of current waveform, and the wave head gradient of the discharge time is prolonged. Meanwhile, the zinc oxide valve plate is replaced by the liquid valve plate, the total resistance value of the valve plate is reduced, the heat productivity of the zinc oxide valve plate is reduced from two dimensions of current and resistance, and the occurrence probability of the thermal breakdown hard short circuit of the lightning arrester is reduced.
Drawings
FIG. 1 is a schematic view of a valve plate according to the present invention;
FIG. 2 is a schematic view of another valve plate structure according to the present invention.
In the attached figure, 1-an insulating tube, 2-a liquid medium, 3-an elastic layer, 4-an insulating shell, 5-a metal plate, 6-a liquid injection port, 7-a sealing bolt, 8-a sealing ring of the liquid injection port, 9-a sealing gasket and 10-a convex edge.
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. 1-2, a liquid valve sheet includes an insulating tube 1, a liquid medium 2, an insulating housing 4 and metal plates 5, wherein the metal plates 5 are hermetically disposed at two ends of the insulating tube 1, the liquid medium 2 is disposed in the insulating tube 1, and the insulating housing 4 is wrapped outside the insulating tube 1. Insulating tube 1 is insulating housing, uses rubber materials, epoxy, the fine or elastic material of PC material of nylon glass to make for have certain deformability, the condition of fracture can not appear when taking place the liquid electricity effect.
The insulating tube is made of high-hardness, high-temperature-resistant and high-pressure-resistant inorganic non-metallic materials and is cylindrical; the inside of the insulating tube is filled with liquid (insulating oil, water-oil mixture, and the like); two ends of the insulating tube are sealed by steel plates. The insulating plastic is arranged on the periphery of the insulating pipe, so that a steel plate structure can be fixed, and lightning flashover along the surface can be avoided.
A plurality of liquid valve plates are connected in series through steel plate connection, and the liquid valve plates are fixed by insulating materials at the periphery to form the liquid valve plate lightning arrester. When overvoltage wave caused by lightning strike is close to protected equipment, the liquid valve plate lightning arrester is firstly punctured, electric arc is led into the liquid valve plate and is poured into liquid, a liquid-electricity effect is generated, strong shock wave is formed, the strong shock wave acts on a discharge channel in an impulse or shock pressure mode, and the electric arc is cut off.
Meanwhile, the liquid valve plates connected in series have multipoint synchronous arc extinguishing capability. In the initial stage of the impulse arc, the arc extinguishing suppression of the arc of the partial impulse discharge is started, and the multipoint synchronous arc interruption is performed on the penetration flashover. After a plurality of arc breakpoints are accumulated, the arc fracture dimension is large, and the reignition cannot occur.
The inside of the insulating tube is filled with liquid (insulating oil, water-oil mixture and the like), plate electrodes are arranged at two ends of the insulating tube for sealing, and insulating materials are arranged at the periphery of the insulating tube for avoiding lightning flashover along the surface. The cake-shaped liquid valve plate is consistent in size and shape with the solid valve plate, so that the valve plate is convenient to mount and replace when the valve plate inside the existing lightning arrester is replaced, and the cost of replacing the device can be reduced.
When the device is used in the aspect of gap arc extinction, the liquid medium can be in a state of weak conductivity, and if the device is used in the aspect of an arrester or a lightning rod, the liquid medium is in a state of close insulation, and the resistance must reach dozens of megaohms. The liquid medium is preferably an insulating oil. Such as transformer oil, circuit breaker oil, capacitor oil, cable oil, etc.
The electro-hydraulic effect insulating oil electro-hydraulic effect arc extinguishing process under the insulating oil condition comprises the following steps: the process of insulating oil breakdown, the process of liquid electric effect, the process of arc extinction and the process of restriking. The insulating oil has high viscosity, high specific heat capacity and high medium strength, and has influence on the pressure peak value and the peak value time of the electrohydraulic effect; the influence of the pressure peak value and the peak time on the arc extinguishing threshold value and the arc extinguishing time; the influence of the sealing structure on the pressure peak value and the peak value time.
The reduction of the peak time of the pressure intensity of the liquid-electric effect reduces the arc extinguishing effect time, forms early intervention of arc extinguishing, and is beneficial to forming a rapid and forced arc extinguishing situation.
The arc extinguishing threshold can be improved by improving the peak value of the intensity of the hydro-electric effect pressure. An asymmetric situation that the arc extinguishing pressure is far larger than the arc breaking pressure is formed, and therefore the arc extinguishing threshold is improved.
3. Compared with water, the breakdown field intensity of the insulating oil is high, which is beneficial to improving the pressure peak value of the electrohydraulic 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 both breakdown voltage and the bursting property of the breakdown process are improved at the same gap distance, so that the current appearance bursting property can be increased by improving the breakdown voltage. The steady-state value of the current after breakdown is improved along with the improvement of the breakdown voltage, so that the current change rate is increased, and the peak value of the intensity of the liquid-electric effect pressure proportional to the current change rate is improved. The increase of the current change rate correspondingly increases the climbing speed of the electro-hydraulic effect pressure, thereby reducing the peak time of the electro-hydraulic effect pressure.
4. Compared with water, the high viscosity of the insulating oil is beneficial to improving the peak value of the pressure intensity of the electrohydraulic effect and the peak time of the stamina building pressure intensity. The insulating oil is high in viscosity, the binding force between molecules is increased inevitably, the space occupation difficulty of the electric arc is increased along with the electric arc breakdown process, the pressure required by space occupation 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 reacted to the electric arc by the insulating oil is increased. Due to the fact that the sensitivity of the insulating oil with high viscosity characteristic for resisting the occupation of the breakdown arc volume is increased, under the condition of extremely small breakdown current, in order to resist the occupation of the small arc volume, extremely high electrohydraulic effect pressure intensity can be generated, and therefore peak time of the electrohydraulic effect pressure intensity is shortened and the pressure intensity peak value is improved.
5. Insulating oil has higher stability compared to water: the insulating oil is an organic 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. Higher specific heat capacity of insulating oil compared to water: the insulating oil has large specific heat capacity, can absorb a large amount of arc temperature, has a cooling effect on the arc, and improves the fragility and the extinguishment of the arc;
7. insulating oil has better dielectric strength recovery than water: after the liquid-electric effect blocks the electric arc, the electric arc fracture is filled with insulating oil, and the breakdown field intensity of the insulating oil is higher than that of water, so that the anti-reignition characteristic is improved.
8. Compared with water, the electric effect arc extinguishing threshold of the insulating oil is larger: the pressure intensity has the characteristic of higher sensitivity through the electric effect of the insulating oil, the arc extinguishing starting time is advanced, higher expected current can be extinguished at the arc initial section, and the 40kA full-scale power frequency short-circuit current arc extinguishing requirement is met.
9. Compared with water, the electric effect of the insulating oil has a high arc extinguishing speed: the electric effect of the insulating oil liquid has higher arc extinguishing sensitivity, so that the arc extinguishing time is advanced. The time for extinguishing the 40kA full-scale short-circuit current is dozens of microseconds to hundreds of microseconds, and the response time of the relay protection outlet is less than dozens of milliseconds, so that the requirement for extinguishing the 40kA full-scale power-frequency short-circuit current before the response time of the relay protection is met.
10. The application range is wide: the insulating oil liquid electric effect aims at reducing the arc extinction shock wave pressure peak value time, improving the arc extinction shock wave pressure peak value and the medium recovery strength, improving the arc extinction threshold value, reducing the arc extinction time and providing a new method for solving the lightning stroke tripping. The arc extinguishing device is suitable for arc extinguishing requirements of 10kV, 35kV, 110kV, 220kV, 500kV, 800kV and 1000kV voltage levels.
11. Insulation matching of each voltage class: by controlling the length of the liquid-electric effect arc extinguishing segment and the length of the air gap, the requirement of insulation matching under any voltage level can be met.
12. Compared with water and valve plates, the electric effect of the insulating oil is quicker to extinguish the arc, the 'time lag' effect of the valve plates is avoided, the long arc extinguishing time and the high-temperature reburning can be caused to generate larger heat quantity due to the fact that the pressure peak value is lower, the time lag of the pressure peak value and the low medium recovery strength are caused by low viscosity and low breakdown field strength in the process of the water medium liquid electric effect, the result that the structure is damaged due to water gasification and decomposition is caused is avoided, and the safety and the durability of the electric effect lightning protection of the insulating oil are improved.
In the embodiment of the invention, the metal plate 5 is provided with the liquid injection port 6, the liquid injection port 6 is provided with the sealing bolt 7 for sealing, and the side edge of the sealing bolt 7 is provided with the liquid injection port sealing ring 8. The liquid injection port 6 can be used for adding liquid medium at variable time, thereby realizing the effect of repeated use.
In the embodiment of the invention, the elastic layer 3 is arranged on the inner side wall of the insulating tube 1, and the elastic layer 3 is arranged between the inner side wall of the insulating tube 1 and the liquid medium 2. Elastic layer 3 can be the rubber layer, reduces intraductal pressure, and the elastic material of elastic layer 2 who sets up in the insulating tube has little pit at its surface, and the stress area of increase insulating tube inner wall also improves the roughness on surface simultaneously, because satisfy the relation between pressure and the area and be: and P is F/S, namely the inverse ratio of the force-bearing area to the pressure.
In the embodiment of the invention, the shell of the insulating tube 1 is provided with a plurality of convex edges 10, the convex edges 10 are arranged at intervals, and the convex edges 10 and the insulating tube 1 are integrally arranged. The flange 10 is primarily intended to prevent arcing from the layers, and it is preferable that it be provided as a unitary structure. Without the flange 10, the metal plate would need to be made smaller than the outer diameter of the insulating tube 1.
The utility model provides a plastic housing parcel is provided with in all liquid valve block outsides, the end to end setting between liquid valve block and the liquid valve block of liquid valve block device more than two. The outer side of the plastic shell is provided with a skirt edge. The liquid valve plate device can be used in the field of lightning arresters, carries out arc extinction on thunder and lightning, and can also be used on a power frequency flashover device.
A liquid valve plate arc extinguishing method is characterized in that when a lightning arc penetrates through a liquid medium 2 from a metal plate 5 on one side of a liquid valve plate and then comes out from a metal plate 5 on the other side, a discharge channel is formed on the liquid medium 2, a liquid-electricity effect, a reflected shock wave superposition effect and a Pascal effect are generated, a shock wave is formed and acts on the discharge channel in an impulse or shock pressure mode, an acting force acts on the inner wall of a sealed insulating tube body 1, then the shock wave rebounds to form an acting force with the direction pointing to the center of the tube, and the arc is cut off.
After the electric arc breaks down the valve plate, the arc is rapidly extinguished through the liquid electric effect: when the arc is filled into the insulating tube, the arc discharges in the tube containing liquid, and part of the liquid in the discharge channel is instantaneously 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 presented to the outside, an impact acting force is formed in the insulating 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.
A plurality of liquid valve blocks are connected in series to form multipoint electrohydraulic effect synchronous arc extinction: the synchronous arc extinguishing capability of the multipoint electrohydraulic effect is formed by connecting the liquid valve plates in series. In the initial stage of the impact arc, the arc extinguishing suppression of the arc of the partial impact discharge is started, and the penetration flashover is carried out to cut off the arc synchronously at multiple points. After a plurality of arc breakpoints are accumulated, the arc fracture dimension is large, and the reignition cannot occur.
The energy of the electric arc is greatly reduced after the electric arc is acted by the hydro-electric effect of the first-stage liquid valve plate, the residual electric arc enters the second liquid valve plate to cause the hydro-electric effect again to weaken the energy of the electric arc, and then the processes are sequentially carried out. In the whole process, the liquid valve plate cuts off the long electric arc into the short electric arc, destroys the impact arc-establishing channel and inhibits the power frequency arc-establishing process.
Double insulation matching: the breakdown ignition voltage is determined by volt-second characteristics, and the residual voltage is determined by negative resistance volt-ampere characteristics. When lightning strike occurs but before the liquid valve plate is broken down, a capacitor chain formed by the liquid valve plate has large capacitance and can play a role of guiding high-frequency lightning pulse, so that the lightning energy is released into the ground through an arc extinguishing path of the liquid valve plate, the lightning current can pass more easily, the ignition voltage under the lightning pulse is reduced, the volt-second characteristic and the breakdown voltage are reduced, and the insulation matching is facilitated.
When the lightning breaks through the liquid valve plate, the plate is in a short circuit state after being broken through, and the residual voltage is pulled to a low level by arc voltage drop. The residual voltage reduction is beneficial to protecting power electronic equipment, so that the lightning resistance level of the equipment and the liquid valve plate lightning arrester after the residual voltage attenuation form reasonable insulation matching.
The liquid medium 2 adopts emulsified mixed liquid of oil and water or insulating oil, the oil is wrapped in after being cut by water, the outer surfaces of oil particles are connected into a piece through water to form a complete water medium discharge channel, the breakdown characteristic of a single pure water medium is kept, in the process of electric arc discharge along the water medium, electric arc plasma is restricted by incompressibility generated by wrapping of the insulating oil to generate pressure intensity and attenuation shock wave conduction pressure intensity, the liquid cannot instantaneously deform and displace due to short lightning arc impact time, the mixed liquid can be regarded as a shock wave transmission medium which cannot be compressed per se at the moment, compared with a medium which is difficult to be compressed by common single liquid, the mixed liquid has higher viscosity and higher surface tension, the force of the emulsified mixed liquid maintaining the original state of the emulsified mixed liquid can be increased, and the pressure intensity of hundreds of megapascals can be synchronously generated on the contact surface of the electric arc and the emulsified mixed liquid under the pressure effect generated by electric arc breakdown of the mixed liquid, the hundred megapascal synchronous pressure reacts on the electric arc and interrupts the electric arc, so that the occupation of the electric arc is eliminated, the incompressibility of the high-viscosity mixed liquid is ensured, meanwhile, the high-viscosity liquid can absorb more energy of the conduction shock wave, the pressure intensity is attenuated, the impact force on a recoil arc extinguishing structure is reduced, and the reliability and the durability of the structure are improved.
In the process of breaking down insulating oil by an electrohydraulic effect impact electric arc under the condition of insulating oil, the volume occupation requirement of the electric arc on the insulating oil is provided in a very short time, the viscosity of the insulating oil is high, the electric arc occupation space is given out in a very short time without reaching displacement, and the strong opposition of the electric arc occupation and the space position given out by the insulating oil without reaching displacement is formed, so that a hundred-megapascal mechanical pressure peak shock wave is generated, the shock wave is reversely acted on a power frequency electric arc body, and the factors for improving the electrohydraulic effect shock wave pressure peak value and simultaneously reducing the electrohydraulic effect pressure peak value time comprise: when dielectric strength can improve the breakdown field intensity, form the very fast electron of high field intensity and collapse the process, improve electric arc breakdown speed from this, increase the proruption of electric arc space occupation, insulating oil high viscosity slows down the space speed of stepping down, and a large amount of electric arc heats can be absorbed to high specific heat capacity, reduce the electric arc temperature.
The elastic layer 2 also reflects the fundamental wave of the liquid electricity effect, so that the fundamental wave acts on an electric arc channel, an electric arc is extinguished more easily, the instantaneous pressure borne by the pipe wall is reduced, and the insulating pipe is prevented from being burst.
The specific process of reflecting the shock wave superposition effect is as follows:
the shock wave and the reflected shock wave are overlapped to generate an interference phenomenon, so that the energy of vibration reinforced vibration is increased, when the electric arc enters an arc extinguishing channel containing emulsified mixed liquid, the temperature of plasma generated by liquid phase discharge reaches 1500-3000K, high temperature and high pressure generated in the channel cannot be leaked 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 on the inner wall surface are overlapped to increase an overpressure peak value.
If the emulsifier is ionic surfactant, the ionization also has adsorption effect on the interface, so that the droplets of the emulsion have charges, and the charge is determined by the ionization strength; for the nonionic surfactant, the adsorption has a friction effect, so that the liquid drops are charged, the charge size of the liquid drops is related to the concentration of external phase ions, the dielectric constant and the friction constant, when the charged liquid drops approach, a repulsive force is generated, so that the charged liquid drops are difficult to coalesce, the stability of the emulsion is improved, the charged liquid drops of the emulsion form an electric double layer structure on two sides of an interface, and the repulsive action of the electric double layer generates a great geomechanics effect, so that the reflection impact pressure is generated in the insulating tube and acts on electric arcs.
The concrete process of generating the Pascal effect is as follows: the pressure change of a certain part of static fluid in the sealing tube structure is transmitted to all directions unchanged, then the liquid medium around is impacted by a larger acting force from a discharge channel in the insulating tube, the acting force rebounds after touching the insulating tube wall to form an acting force with the direction pointing to the center of the insulating tube, the impact pressure and the occupied pressure peak value are generated in the enhanced liquid electric effect, the double pressure sources are jointly acted by the amplifying force to cut off the electric arc, the longer the electric arc in the insulating tube is, the larger the acting force on the insulating tube wall is, the larger the impact pressure of the electric arc is cut off in reverse, and the secondary reburning of the electric arc is prevented.
The insulating body 1 of sealing tube structure is provided with elastic layer 2, and 2 increase lifting surface areas of elastic layer reduce intraductal pressure, and the elastic material of elastic layer 2 who sets up in the insulating tube has little pit on its surface, and the lifting surface area of increase insulating tube inner wall also improves the roughness on surface simultaneously, because satisfy the relation between pressure and the area and be: after the elastic layer 2 is added in the insulating tube body 1 of the sealing tube structure, the maximum pressure in the insulating tube body 1 of the sealing tube structure is lower than that before the elastic material is not added under the action of electric arc impact, so that the situation that the insulating tube explodes due to overlarge pressure in the tube is avoided.
Meanwhile, the insulating tube is prevented from being directly impacted by the acting force generated by the Pascal effect, the impact wave in the tube firstly forms the impact acting force on the elastic insulating material, the reaction force acting on the inner surface of the insulating tube is reduced, and the insulating tube with lower hardness is prevented from being broken due to the direct impact of the reaction force.
An application of liquid valve block, the liquid valve block is used on lightning arrester, arc-extinguishing insulator and arc-extinguishing gap device. The liquid valve block can be installed in series and use inside the arrester, and the liquid valve block also can be installed and use in the inside of arc extinguishing insulator chain simultaneously, and the use is installed on the gold utensil at the both ends of insulator on the arc extinguishing clearance device, sets up relatively, and the centre is provided with the clearance.
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 liquid valve block which characterized in that: including insulating tube (1), liquid medium (2), insulating casing (4) and metal sheet (5), metal sheet (5) seal sets up the both ends in insulating tube (1), and liquid medium (2) set up in insulating tube (1), and insulating casing (4) parcel is in the outside of insulating tube (1).
2. The liquid valve sheet of claim 1, wherein: the metal plate (5) is provided with a liquid injection port (6), the liquid injection port (6) is provided with a sealing bolt (7) for sealing, and the side edge of the sealing bolt (7) is provided with a liquid injection port sealing ring (8).
3. The liquid valve sheet of claim 1, wherein: an elastic layer (3) is arranged on the inner side wall of the insulating pipe (1), and the elastic layer (3) is arranged between the inner side wall of the insulating pipe (1) and the liquid medium (2).
4. The liquid valve sheet of claim 1, wherein: the shell of insulating tube (1) is provided with a plurality of chimb (10), and the interval sets up between chimb (10), chimb (10) and insulating tube (1) integrative setting.
5. The utility model provides a liquid valve block device which characterized in that: more than two liquid valve plates, the end to end setting between liquid valve plate and the liquid valve plate, all liquid valve plate outsides are provided with plastic housing parcel. The outer side of the plastic shell is provided with a skirt edge.
6. An arc extinguishing method of a liquid valve plate is characterized in that: when a lightning arc penetrates through the liquid medium (2) from the metal plate (5) on one side of the liquid valve plate and then exits from the metal plate (5) on the other side, a discharge channel is formed on the liquid medium (2), a liquid-electricity effect, a reflected shock wave superposition effect and a Pascal effect are generated, a shock wave is formed and acts on the discharge channel in an impulse or shock pressure mode, the acting force acts on the inner wall of the sealed insulating tube body (1), and then the shock wave rebounds to form an acting force with the direction pointing to the center of the tube and cut off the arc.
7. The liquid valve plate arc extinguishing method according to claim 6, characterized in that: the liquid medium (2) adopts emulsified mixed liquid of oil and water or insulating oil, the oil is wrapped in after being cut by water, the outer surfaces of oil particles are connected into a piece through water to form a complete water medium discharge channel, the breakdown characteristic of a single pure water medium is kept, in the process of electric arc discharge along the water medium, electric arc plasma is restrained by incompressibility generated by wrapping of the insulating oil to generate pressure intensity and attenuation shock wave conduction pressure intensity, the liquid cannot instantaneously deform and displace due to short lightning arc impact time, at the moment, the mixed liquid can be regarded as shock wave transmission medium which cannot be compressed per se, compared with the common single liquid, the medium which is more difficult to compress is higher in viscosity and higher in surface tension, the force of the emulsified mixed liquid maintaining the original state of the emulsified mixed liquid can be increased, and under the pressure effect generated by electric arc breakdown of the mixed liquid, hundreds of megapascal pressure intensity can be generated at the contact surface of the electric arc and the emulsified mixed liquid at the same time, the hundred megapascal-level synchronous pressure reacts on the electric arc and interrupts the electric arc, so that the occupation of the electric arc is eliminated, the incompressibility of the high-viscosity mixed liquid is ensured, meanwhile, the high-viscosity liquid can absorb more energy of the conduction shock wave, the pressure intensity is attenuated, the impact force on a recoil arc extinguishing structure is reduced, and the reliability and the durability of the structure are improved;
in the process of breaking down insulating oil by an electrohydraulic effect impact electric arc under the condition of insulating oil, the volume occupation requirement of the electric arc on the insulating oil is provided in a very short time, the viscosity of the insulating oil is high, the electric arc occupation space is given out in a very short time without reaching displacement, and the strong opposition of the electric arc occupation and the space position given out by the insulating oil without reaching displacement is formed, so that a hundred-megapascal mechanical pressure peak shock wave is generated, the shock wave is reversely acted on a power frequency electric arc body, and the factors for improving the electrohydraulic effect shock wave pressure peak value and simultaneously reducing the electrohydraulic effect pressure peak value time comprise: when dielectric strength can improve the breakdown field intensity, form the very fast electron of high field intensity and collapse the process, improve electric arc breakdown speed from this, increase the proruption nature that the electric arc space was occupy-place, insulating oil high viscosity slows down the space speed of stepping down, and a large amount of electric arc heats can be absorbed to high specific heat capacity, reduces the electric arc temperature.
8. The liquid valve plate arc extinguishing method according to claim 6, characterized in that: the specific process of reflecting the shock wave superposition effect is as follows:
the shock wave and the reflected shock wave are overlapped and meet to generate an interference phenomenon, so that the energy of vibration reinforced vibration is increased, when the electric arc enters an arc extinguishing channel containing emulsified mixed liquid, the temperature of plasma generated by liquid phase discharge reaches 1500-;
if the emulsifier is ionic surfactant, the ionization also has adsorption effect on the interface, so that the droplets of the emulsion have charges, and the charge is determined by the ionization strength; for the nonionic surfactant, the adsorption has a friction effect, so that the liquid drops are charged, the charge size of the liquid drops is related to the concentration of external phase ions, the dielectric constant and the friction constant, when the charged liquid drops approach, repulsive force is generated, so that the charged liquid drops are difficult to coalesce, the stability of the emulsion is improved, the charged liquid drops of the emulsion form an electric double layer structure on two sides of an interface, and the repulsive effect of the electric double layer generates a great geomechanics effect, so that the reflection impact pressure is generated in the insulating tube to act on electric arcs.
9. The liquid valve plate arc extinguishing method according to claim 6, characterized in that: the concrete process of generating the Pascal effect is as follows: pressure intensity change generated by a certain part of static fluid in the sealing tube structure is transmitted to all directions invariably, then the liquid medium around is impacted by a larger acting force from a discharge channel in the insulating tube, the acting force rebounds after contacting the insulating tube wall to form an acting force with the direction pointing to the center of the insulating tube, impact pressure and an occupied pressure peak value are generated in the enhanced liquid electric effect, double pressure sources are jointly acted by the amplifying force to cut off the electric arc, the longer the electric arc in the insulating tube is, the larger the acting force on the insulating tube wall is, the larger the impact pressure of the electric arc is cut off in reverse, and secondary reburning of the electric arc is prevented;
be provided with elastic layer (2) in the insulating body (1) of sealing tube structure, elastic layer (2) increase lifting surface area reduces intraductal pressure, and the elastic material of elastic layer (2) of setting in the insulating tube has little pit on its surface, and the lifting surface area on increase insulating tube inner wall also improves the roughness on surface simultaneously, because satisfies the relation between pressure and the area and is: p is F/S, namely the stress area is in inverse proportion to the pressure intensity, after the elastic layer (2) is added in the insulating tube body (1) of the sealing tube structure, the maximum pressure intensity in the insulating tube body (1) of the sealing tube structure is lower than that before the elastic material is not added under the action of electric arc impact, and the situation that the insulating tube explodes due to the fact that the pressure intensity in the tube is too large is avoided;
the elastic layer (2) also reflects the fundamental wave of the liquid electricity effect, so that the fundamental wave acts on an electric arc channel, electric arcs are extinguished more easily, the instant pressure borne by the pipe wall is reduced, and the insulating pipe is prevented from being cracked;
meanwhile, the insulating tube is prevented from being directly impacted by the acting force generated by the Pascal effect, the impact wave in the tube firstly forms the impact acting force on the elastic insulating material, the reaction force acting on the inner surface of the insulating tube is reduced, and the insulating tube with lower hardness is prevented from being broken due to the direct impact of the reaction force.
10. The use of a liquid valve sheet according to claim 1, wherein: the liquid valve plate is applied to the lightning arrester, the arc extinguishing insulator and the arc extinguishing gap device.
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| CN2021104433079 | 2021-04-23 | ||
| CN202110443307.9A CN113328340A (en) | 2021-04-23 | 2021-04-23 | Liquid recoil arc extinguishing lightning protection method |
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| CN202210402699.9A Withdrawn CN114640025A (en) | 2021-04-23 | 2022-04-20 | Multi-medium variable-pitch electrohydraulic effect arc extinguishing device and method |
| CN202210402700.8A Active CN114640026B (en) | 2021-04-23 | 2022-04-20 | Three-state combined arc extinguishing device and arc extinguishing method |
| CN202210417818.8A Withdrawn CN114628996A (en) | 2021-04-23 | 2022-04-20 | Solid-liquid combined arc extinguishing enhanced zinc oxide lightning arrester and arc extinguishing method |
| CN202210418406.6A Active CN114629005B (en) | 2021-04-23 | 2022-04-20 | Enhanced lightning protection insulator and arc extinguishing method |
| CN202210418408.5A Active CN114665384B (en) | 2021-04-23 | 2022-04-20 | Multi-section liquid state arc extinguishing device and method |
| CN202210418057.8A Withdrawn CN114629000A (en) | 2021-04-23 | 2022-04-20 | Arc extinguishing lightning arrester with liquid electric effect and arc extinguishing method |
| CN202210417886.4A Active CN114628997B (en) | 2021-04-23 | 2022-04-20 | Dynamic arc extinguishing system and method for eliminating power frequency insulation strength loss |
| CN202210416294.0A Active CN115621845B (en) | 2021-04-23 | 2022-04-20 | Liquid supplementing and strong sealing type liquid-electricity effect arc extinguishing device and arc extinguishing method thereof |
| CN202210418410.2A Active CN114629007B (en) | 2021-04-23 | 2022-04-20 | Lightning intensity attenuation device and method for protecting fan blade |
| CN202210418407.0A Withdrawn CN114629006A (en) | 2021-04-23 | 2022-04-20 | Lightning rod capable of attenuating lightning current amplitude and gradient by using liquid-electric effect and arc extinguishing method thereof |
| CN202210418335.XA Withdrawn CN114665383A (en) | 2021-04-23 | 2022-04-20 | Multi-liquid-medium variable-pitch self-adaptive arc-building suppression device and method |
| CN202210418032.8A Active CN114628999B (en) | 2021-04-23 | 2022-04-20 | Attenuation lightning rod based on hydro-electric effect and arc extinguishing method thereof |
| CN202210416259.9A Active CN115548881B (en) | 2021-04-23 | 2022-04-20 | Sealing device for high-strength arc extinction and arc extinction method |
| CN202210418333.0A Active CN114629003B (en) | 2021-04-23 | 2022-04-20 | Combined arc extinguishing device and method for fully-closed liquid-electricity chamber and open liquid-electricity chamber |
| CN202210418331.1A Withdrawn CN114629001A (en) | 2021-04-23 | 2022-04-20 | Electric-solid and liquid-electric effect arc extinguishing device with recoil structure and method thereof |
| CN202210417907.2A Withdrawn CN114628998A (en) | 2021-04-23 | 2022-04-20 | Liquid valve plate, valve plate device, arc extinguishing method and application |
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| CN202210418332.6A Pending CN114629002A (en) | 2021-04-23 | 2022-04-20 | Method and device for strengthening electro-hydraulic effect arc extinction |
| CN202210417656.8A Active CN114628995B (en) | 2021-04-23 | 2022-04-20 | Multi-gap liquid-electricity effect arc extinguishing device and arc extinguishing method |
| CN202210417679.9A Active CN115548882B (en) | 2021-04-23 | 2022-04-20 | Combined hydro-electric effect arc extinguishing method and device |
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| CN202210402699.9A Withdrawn CN114640025A (en) | 2021-04-23 | 2022-04-20 | Multi-medium variable-pitch electrohydraulic effect arc extinguishing device and method |
| CN202210402700.8A Active CN114640026B (en) | 2021-04-23 | 2022-04-20 | Three-state combined arc extinguishing device and arc extinguishing method |
| CN202210417818.8A Withdrawn CN114628996A (en) | 2021-04-23 | 2022-04-20 | Solid-liquid combined arc extinguishing enhanced zinc oxide lightning arrester and arc extinguishing method |
| CN202210418406.6A Active CN114629005B (en) | 2021-04-23 | 2022-04-20 | Enhanced lightning protection insulator and arc extinguishing method |
| CN202210418408.5A Active CN114665384B (en) | 2021-04-23 | 2022-04-20 | Multi-section liquid state arc extinguishing device and method |
| CN202210418057.8A Withdrawn CN114629000A (en) | 2021-04-23 | 2022-04-20 | Arc extinguishing lightning arrester with liquid electric effect and arc extinguishing method |
| CN202210417886.4A Active CN114628997B (en) | 2021-04-23 | 2022-04-20 | Dynamic arc extinguishing system and method for eliminating power frequency insulation strength loss |
| CN202210416294.0A Active CN115621845B (en) | 2021-04-23 | 2022-04-20 | Liquid supplementing and strong sealing type liquid-electricity effect arc extinguishing device and arc extinguishing method thereof |
| CN202210418410.2A Active CN114629007B (en) | 2021-04-23 | 2022-04-20 | Lightning intensity attenuation device and method for protecting fan blade |
| CN202210418407.0A Withdrawn CN114629006A (en) | 2021-04-23 | 2022-04-20 | Lightning rod capable of attenuating lightning current amplitude and gradient by using liquid-electric effect and arc extinguishing method thereof |
| CN202210418335.XA Withdrawn CN114665383A (en) | 2021-04-23 | 2022-04-20 | Multi-liquid-medium variable-pitch self-adaptive arc-building suppression device and method |
| CN202210418032.8A Active CN114628999B (en) | 2021-04-23 | 2022-04-20 | Attenuation lightning rod based on hydro-electric effect and arc extinguishing method thereof |
| CN202210416259.9A Active CN115548881B (en) | 2021-04-23 | 2022-04-20 | Sealing device for high-strength arc extinction and arc extinction method |
| CN202210418333.0A Active CN114629003B (en) | 2021-04-23 | 2022-04-20 | Combined arc extinguishing device and method for fully-closed liquid-electricity chamber and open liquid-electricity chamber |
| CN202210418331.1A Withdrawn CN114629001A (en) | 2021-04-23 | 2022-04-20 | Electric-solid and liquid-electric effect arc extinguishing device with recoil structure and method thereof |
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| CN202210418332.6A Pending CN114629002A (en) | 2021-04-23 | 2022-04-20 | Method and device for strengthening electro-hydraulic effect arc extinction |
| CN202210417656.8A Active CN114628995B (en) | 2021-04-23 | 2022-04-20 | Multi-gap liquid-electricity effect arc extinguishing device and arc extinguishing method |
| CN202210417679.9A Active CN115548882B (en) | 2021-04-23 | 2022-04-20 | Combined hydro-electric effect arc extinguishing method and device |
| CN202210418334.5A Withdrawn CN114629004A (en) | 2021-04-23 | 2022-04-20 | Hydro-electric effect arc extinguishing device and method based on oil-water emulsified mixed liquid |
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2021
- 2021-04-23 CN CN202110443307.9A patent/CN113328340A/en active Pending
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2022
- 2022-04-20 CN CN202210402699.9A patent/CN114640025A/en not_active Withdrawn
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- 2022-04-20 CN CN202210418406.6A patent/CN114629005B/en active Active
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- 2022-04-20 CN CN202210416294.0A patent/CN115621845B/en active Active
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Also Published As
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|---|---|
| CN114628996A (en) | 2022-06-14 |
| CN114629002A (en) | 2022-06-14 |
| CN114629007A (en) | 2022-06-14 |
| CN115548881A (en) | 2022-12-30 |
| CN114628995B (en) | 2023-12-29 |
| CN114628997A (en) | 2022-06-14 |
| CN114629008A (en) | 2022-06-14 |
| CN114665384B (en) | 2024-01-05 |
| CN114628997B (en) | 2023-11-24 |
| CN114629003B (en) | 2023-12-22 |
| CN114640026A (en) | 2022-06-17 |
| CN114629005A (en) | 2022-06-14 |
| CN114628995A (en) | 2022-06-14 |
| CN114629005B (en) | 2023-12-22 |
| CN114629003A (en) | 2022-06-14 |
| CN114629006A (en) | 2022-06-14 |
| CN114665383A (en) | 2022-06-24 |
| CN114629007B (en) | 2024-03-08 |
| CN114628999B (en) | 2024-01-05 |
| CN114629001A (en) | 2022-06-14 |
| CN114640026B (en) | 2023-12-29 |
| CN115621845B (en) | 2024-03-08 |
| CN115548881B (en) | 2024-04-19 |
| CN114628999A (en) | 2022-06-14 |
| CN114640025A (en) | 2022-06-17 |
| CN114629000A (en) | 2022-06-14 |
| CN114629004A (en) | 2022-06-14 |
| CN113328340A (en) | 2021-08-31 |
| CN114665384A (en) | 2022-06-24 |
| CN115548882A (en) | 2022-12-30 |
| CN115548882B (en) | 2024-04-19 |
| CN115621845A (en) | 2023-01-17 |
| CN114629008B (en) | 2024-01-05 |
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Application publication date: 20220614 |