Magnetic induction arc extinguishing device
By using magnetic inductive arc extinguishing devices in arc extinguishing equipment, the movable magnetic parts that move with magnetic fields are physically pulled out of the arc, and the problem of limited use of existing gas arc extinguishing equipment is solved, achieving low maintenance costs and efficient arc extinguishing effects.
Patent Information
- Application Number
- CN202510264377.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-05-30
AI Technical Summary
The existing arc extinguishing equipment uses gas arc extinguishing equipment to extinguish gas in a limited number of uses and the need to frequently replace gas-producing materials, resulting in increased maintenance costs and workload.
The magnetic inductive arc extinguishing device is adopted, including a housing, a first magnetic part, a second magnetic part and a movable magnetic part. The movable magnetic part moving along the arc channel through the magnetic field acts to physically pull the arc off to achieve a continuous and stable arc extinguishing effect.
It realizes continuous and stable arc extinguishing without the need for regular replacement of internal materials, reduces maintenance costs and workloads, and is easy to use.
Smart Images
Figure CN120073486A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of arc extinguishing and lightning protection, and particularly to a magnetic induction arc extinguishing device. Background Art
[0002] Lightning strikes cause great damage to the power grid. They can not only lead to overvoltage, system failures, and even equipment damage, but also trigger secondary disasters such as fires and explosions, seriously endangering people's lives and property.
[0003] To reduce the impact of lightning strikes on transmission lines, lightning arresters are usually used to reasonably guide and release lightning energy, preventing major accidents from occurring after the transmission lines are struck by lightning. Traditional lightning arresters usually use gas arc extinguishing methods, but there are certain limitations in using gas arc extinguishing. For example, the number of uses is limited, and the gas-producing materials need to be replaced in a timely manner, resulting in an increase in the maintenance cost and workload of the lightning arrester. Summary of the Invention
[0004] This application provides a magnetic induction arc extinguishing device to solve the problems of limited number of uses and the need to frequently replace gas-producing materials in the existing arc extinguishing equipment using gas arc extinguishing.
[0005] To achieve the above object, this application adopts the following technical solutions:
[0006] This application provides a magnetic induction arc extinguishing device, including a housing provided with an arc channel. At the top of the arc channel, there is an arc ignition electrode, and at the bottom of the arc channel, there is a grounding electrode; a first magnetic member is arranged in the upper part of the arc channel and is electrically connected to the arc ignition electrode; a second magnetic member is arranged in the lower part of the arc channel and is connected to the grounding electrode; a movable magnetic member is arranged between the first magnetic member and the second magnetic member and can move along the arc channel; when there is no current in the arc channel, the movable magnetic member hovers in the middle of the arc channel; when current is generated in the arc channel, the movable magnetic member slides up and down along the arc channel.
[0007] As an optional implementation manner, the first magnetic member includes a first magnet and a first coil. The first coil is wound around the first magnet, and the upper end of the first coil is connected to the arc ignition electrode; moreover, the magnetic pole of the first magnet opposite to the movable magnetic member has the same polarity, the magnetic pole of the second magnetic member opposite to the movable magnetic member has the same magnetism, and the magnetic field generated after the first coil is energized is opposite to the magnetic field generated by the first magnet.
[0008] As an optional implementation manner, the second magnetic member includes a second magnet and a second coil. The second coil is wound around the second magnet, and the lower end of the second coil is connected to the grounding electrode; moreover, the magnetic field generated after the second coil is energized is the same as the magnetic field generated by the second magnet.
[0009] As an alternative embodiment, the movable magnetic member includes a third magnet and a graphene layer, and the graphene layer covers the surface of the third magnet.
[0010] As an alternative embodiment, an exhaust passage is formed in the housing, and the exhaust passage communicates the arc passage with the outside.
[0011] As an alternative embodiment, the exhaust passage includes: an upper exhaust passage located between the first magnetic member and the movable magnetic member; a lower exhaust passage located between the second magnetic member and the movable magnetic member.
[0012] As an alternative embodiment, from the arc passage to the outer wall of the housing, the exhaust passage is inclined downward.
[0013] As an alternative embodiment, from the arc passage to the outer wall of the housing, the exhaust passage includes a first straight section, an arc section, and a second straight section that are connected in sequence. The arc section bulges toward the top of the housing or the arc section bulges toward the bottom of the housing.
[0014] As an alternative embodiment, a moisture absorption layer is provided in the exhaust passage; and / or, an arc absorption layer is provided in the exhaust passage.
[0015] As an alternative embodiment, it further includes: an insulator string connected to the housing through a support frame.
[0016] The magnetic induction arc extinguishing device provided in the present application includes a housing, a first magnetic member, a second magnetic member, and a movable magnetic member. Among them, the housing is provided with an arc passage, an arc ignition electrode is provided at the top end of the arc passage, and a grounding electrode is provided at the bottom end of the arc passage. The first magnetic member is disposed in the upper part of the arc passage and is electrically connected to the arc ignition electrode. The second magnetic member is disposed in the lower part of the arc passage and is connected to the grounding electrode. The movable magnetic member is disposed between the first magnetic member and the second magnetic member, and the movable magnetic member can move along the arc passage. When there is no current in the arc passage, the movable magnetic member hovers in the middle of the arc passage. When a current is generated in the arc passage, the movable magnetic member slides up and down along the arc passage.
[0017] When a lightning phenomenon occurs, an extremely high impact voltage will be generated between the arc ignition electrode and the grounding electrode, breaking down the gas in the arc passage and forming a conductive channel. This conductive channel allows current to pass through, thereby generating an arc. When the movable magnetic member moves upward along the arc passage, the arc between the movable magnetic member and the second magnetic member can be broken. When the movable magnetic member moves downward along the arc passage, the arc between the movable magnetic member and the first magnetic member can also be broken, thereby achieving an arc extinguishing effect. After arc extinguishing, under the action of the first magnetic member and the second magnetic member, the movable magnetic member hovers again in the middle of the arc passage, waiting for the next arc extinguishing.
[0018] Through the cooperation among the above-mentioned first magnetic member, movable magnetic member and second magnetic member, the arc length can be physically increased to break the internal arc, so as to achieve continuous and stable effective arc extinguishing. And there is no need for regular maintenance to replace internal materials, with low maintenance cost and convenient use. Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] Figure 1 Structural schematic diagram of a magnetic induction arc extinguishing device provided by an embodiment of the present application;
[0021] Figure 2 Structural schematic diagram of an exhaust passage provided by an embodiment of the present application;
[0022] Figure 3 Another structural schematic diagram of an exhaust passage provided by an embodiment of the present application;
[0023] Figure 4 Connection schematic diagram of the magnetic induction arc extinguishing device and the insulator string provided by an embodiment of the present application.
[0024] Description of the reference numerals:
[0025] 10 - Magnetic induction arc extinguishing device; 100 - Housing; 110 - Arc passage; 120 - Exhaust passage; 121 - First upper exhaust passage; 122 - Second upper exhaust passage; 123 - First lower exhaust passage; 124 - Second lower exhaust passage; 125 - First straight section; 126 - Arc section; 127 - Second straight section; 130 - Moisture absorption layer; 140 - Arc absorption layer;
[0026] 200 - First magnetic member; 210 - First coil; 211 - First coil upper terminal; 212 - First coil lower terminal; 220 - First magnet;
[0027] 300 - Second magnetic member; 310 - Second coil; 311 - Second coil upper terminal; 312 - Second coil lower terminal; 320 - Second magnet;
[0028] 400 - Movable magnetic member;
[0029] 510 - Arc ignition electrode; 520 - Grounding electrode;
[0030] 20 - Insulator string;
[0031] 31-first cross arm; 32-second cross arm;
[0032] 40-Support rod. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0034] Lightning strikes can cause great harm to the power grid system. In mild cases, they may cause line tripping, damage to transmission lines, breakdown of insulators, failure of transformers, and damage to distribution systems and equipment. In severe cases, they may even cause secondary disasters such as fires and explosions, which can seriously damage people's lives and property.
[0035] According to statistics, lightning strikes are one of the main causes of transmission line accidents. The number of transmission line tripping accidents caused by lightning strikes accounts for more than 50% of the total number of tripping accidents. In addition, the strong current and high temperature generated by lightning may also cause the transmission line to be burned or cause serious strand breakage. Not only that, the electromagnetic pulse of lightning will also interfere with and damage the power distribution system, control equipment, communication equipment, etc. in the power grid, making the equipment unable to work normally, causing data loss, system paralysis and other problems.
[0036] In order to reduce the impact of lightning strikes on power transmission lines, in the prior art, lightning arresters are usually used to reasonably guide and release lightning energy, thereby effectively preventing major accidents after the power transmission lines are struck by lightning. At present, lightning arresters mostly use gas arc extinguishing. Gas arc extinguishing refers to the use of solid gas-generating materials to decompose under the high temperature of the arc to produce a large amount of gas to achieve arc extinguishing.
[0037] When the arrester is in operation, the high temperature generated by the arc causes the gas-generating material in the arrester to decompose rapidly, generating a large amount of gas. These gases form high pressure in the arc extinguishing chamber, producing a strong arc blowing effect. On the one hand, the blowing of high-pressure gas can quickly take away the heat in the arc, causing the arc temperature to drop sharply, reducing the energy of the arc and inhibiting the burning of the arc. On the other hand, the blowing of gas can also make the arc quickly elongated and thinned, increase the length and resistance of the arc, prompt the arc to extinguish when the current passes through zero, and prevent the arc from reigniting.
[0038] However, this method still has certain limitations. Since each arc extinguishing consumes the gas-producing material inside the arrester, after multiple arc extinguishing operations, the gas-producing material inside the arrester gradually decreases, and the arc extinguishing ability significantly declines. That is, the number of times the gas arc extinguishing type arrester can be used is limited, and maintenance personnel need to regularly inspect it and timely replace the gas-producing material to prevent the arrester from failing, which undoubtedly brings higher maintenance costs and more maintenance workload.
[0039] To overcome the defects in the prior art, the present application provides a magnetic induction arc extinguishing device, which includes a housing, a first magnetic member, a second magnetic member, and a movable magnetic member. Among them, the housing is provided with an arc channel, the top of the arc channel is provided with an arc ignition electrode, and the bottom of the arc channel is provided with a grounding electrode. The first magnetic member is arranged in the upper part of the arc channel and is electrically connected to the arc ignition electrode. The second magnetic member is arranged in the lower part of the arc channel and is electrically connected to the grounding electrode. The movable magnetic member is arranged between the first magnetic member and the second magnetic member, and the movable magnetic member can move along the arc channel. When there is no current in the arc channel, the movable magnetic member hovers in the middle of the arc channel. When a current is generated in the arc channel, the movable magnetic member slides up and down along the arc channel.
[0040] When a lightning phenomenon occurs, an extremely high impact voltage will be generated between the arc ignition electrode and the grounding electrode, breaking down the gas in the arc channel and forming a conductive channel. This conductive channel allows current to pass through, thereby generating an arc.
[0041] Since the first magnetic member is arranged in the upper part of the arc channel and is electrically connected to the arc ignition electrode, the second magnetic member is arranged in the lower part of the arc channel and is electrically connected to the grounding electrode, and the movable magnetic member is arranged between the first magnetic member and the second magnetic member. When the movable magnetic member moves upward along the arc channel, the arc between the movable magnetic member and the second magnetic member can be broken. When the movable magnetic member moves downward along the arc channel, the arc between the movable magnetic member and the first magnetic member can also be broken, thereby achieving the arc extinguishing effect. After the arc extinguishing is achieved, under the action of the first magnetic member and the second magnetic member, the movable magnetic member hovers again in the middle of the arc channel, waiting for the next arc extinguishing.
[0042] Through the cooperation among the above-mentioned first magnetic member, movable magnetic member, and second magnetic member, the arc length can be physically increased to break the internal arc, achieving continuous and stable effective arc extinguishing. And there is no need for regular maintenance to replace internal materials, with low maintenance costs and convenient use.
[0043] The following will describe the content of the present application in detail with reference to the accompanying drawings, so that those skilled in the art can understand the content of the present application more clearly and in detail.
[0044] Figure 1 It is a schematic structural diagram of a magnetic induction arc extinguishing device provided by an embodiment of the present application. Refer toFigure 1 As shown, the magnetic arc extinguishing device provided by the embodiment of the present application includes a housing 100, a first magnetic member 200, a second magnetic member 300, and a movable magnetic member 400.
[0045] Among them, an arc channel 110 is provided in the housing 100. The arc channel 110 can provide a path for the arc to avoid the disorderly diffusion of the arc inside the magnetic arc extinguishing device 10 when lightning strikes. An arc ignition electrode 510 is provided at the top of the arc channel 110, and a grounding electrode 520 is provided at the bottom of the arc channel 110. When a lightning phenomenon occurs, the arc ignition electrode 510 can capture the lightning in the air and introduce the lightning current into the arc channel 110, while the grounding electrode 520 can safely introduce the lightning current introduced by the arc ignition electrode 510 into the ground, keeping the potential difference between the device and the ground close to zero, preventing the generation of a dangerous voltage difference between the device and the surrounding environment due to the lightning current, and protecting the safety of personnel and equipment.
[0046] The first magnetic member 200 is arranged in the upper part of the arc channel 110, and the second magnetic member 300 is arranged in the lower part of the arc channel 110. Moreover, the first magnetic member 200 can be electrically connected to the arc ignition electrode 510, and the second magnetic member 300 can be connected to the grounding electrode 520. The movable magnetic member 400 is arranged between the first magnetic member 200 and the second magnetic member 300, and the movable magnetic member 400 can move along the arc channel 110.
[0047] When there is no current passing through the arc channel 110, under the action of the first magnetic member 200 and the second magnetic member 300, the movable magnetic member 400 can hover in the middle of the arc channel 110. At this time, the magnetic arc extinguishing device 10 is in a state of waiting for arc extinguishing, waiting for the current to be activated.
[0048] When there is a lightning phenomenon in the air, the lightning arc can connect the arc ignition electrode 510, the first magnetic member 200, the movable magnetic member 400, the second magnetic member 300, and the grounding electrode 520, and generate an upper arc between the first magnetic member 200 and the movable magnetic member 400, and generate a lower arc between the movable magnetic member 400 and the second magnetic member 300. Under the action of the lightning current, the movable magnetic member 400 can slide up and down along the arc channel 110. Thus, when the movable magnetic member 400 slides up and down along the arc channel 110, as the length of the lower arc or the upper arc increases, it will cause the arc resistance to increase, the electric field strength per unit length to decrease, and the arc surface area to increase, accelerating heat dissipation, and finally forcing the arc to extinguish, realizing the arc extinguishing process.
[0049] After the arc extinguishing is achieved, under the action of the first magnetic member 200 and the second magnetic member 300, the movable magnetic member 400 can hover in the middle of the arc channel 110 again, waiting to trigger the next arc extinguishing process.
[0050] With such a setting, when lightning strikes, through the cooperation among the above-mentioned first magnetic member 200, movable magnetic member 400 and second magnetic member 300, the length of the arc can be physically increased to break the internal arc, so as to achieve continuous and stable effective arc extinguishing. Moreover, there is no need for regular maintenance to replace internal materials, with low maintenance cost and convenient use.
[0051] As an implementation manner, the first magnetic member 200 may include a first magnet 220 and a first coil 210. Among them, the first coil 210 is wound around the first magnet 220, and the upper end of the first coil 210 can be connected to the arc ignition electrode 510. Thus, when the arc ignition electrode 510 captures the lightning arc, current can be passed through the first coil 210. Specifically, the first coil 210 may be provided with a first upper terminal 211 and a first lower terminal 212 of the coil. Among them, the first upper terminal 211 of the coil can be connected to the arc ignition electrode 510 so that current can flow smoothly into the first coil 210 and flow out through the first lower terminal 212 of the coil.
[0052] Moreover, the magnetic pole polarity of the first magnet 220 on the side opposite to the movable magnetic member 400 may be the same, and the magnetic pole of the second magnetic member 300 on the side opposite to the movable magnetic member 400 may have the same magnetic property. For example, with reference to Figure 1 as shown, the magnetic pole polarity direction of the first magnet 220 may be N pole at the upper part and S pole at the lower part, the magnetic pole polarity direction of the second magnet 320 may also be N pole at the upper part and S pole at the lower part, and the magnetic pole polarity direction of the movable magnetic member 400 may be S pole at the upper part and N pole at the lower part.
[0053] In this way, when the first coil 210 is not energized, according to the principle of like poles repelling and opposite poles attracting in electromagnetics, the first magnetic member 200 can exert a downward repulsive force on the movable magnetic member 400, and the second magnetic member 300 can also exert an upward repulsive force on the movable magnetic member 400. Combining the gravity and frictional force of the movable magnetic member 400 itself, finally, the movable magnetic member 400 can achieve force balance at both ends and hover in the middle of the arc channel 110, being at the same distance from the first magnetic member 200 and the second magnetic member 300.
[0054] According to Ampere's rule, hold the energized coil with the right hand, with the four fingers pointing in the direction of the current, then the end pointed by the thumb is the N pole of the equivalent magnetic field of the energized coil, that is, the direction of the magnetic field generated by the energized coil can be determined by the way of winding the coil.
[0055] When a lightning arc is connected to the arc ignition channel, the first coil 210 can be energized. By setting the winding mode of the coil, a magnetic field opposite to the magnetic field direction generated by the first magnet 220 can be generated after the first coil 210 is energized. That is to say, the magnetic field direction generated by the first coil 210 is the upper S pole and the lower N pole. Moreover, the magnetic field intensity of this magnetic field is stronger than that of the first magnet 220. Therefore, the first magnetic member 200 can finally be equivalent to a magnetic field effect with the upper S pole and the lower N pole. In this way, the original repulsive force of the first magnetic member 200 on the movable magnetic member 400 becomes an attractive force, thereby breaking the original balance. The movable magnetic member 400 will move upward along the arc channel 110 under the action of magnetic force, so as to break the lower arc and prompt the lower arc to extinguish.
[0056] It can be understood that the specific magnetic pole polarities of the first magnet 220, the second magnetic member 300 and the intermediate magnetic member are not limited herein, as long as the magnetic pole polarities of the first magnet 220 opposite to the movable magnetic member 400 are the same, and the magnetic polarities of the second magnetic member 300 opposite to the movable magnetic member 400 are the same.
[0057] Since the lightning arc will ionize the gas in the arc channel 110 and cause violent expansion, forming a high-temperature environment. When the temperature in the arc channel 110 continues to rise, the high temperature will briefly disrupt the magnetic domains inside the magnet, so that the magnetism of the movable magnetic member 400 can be briefly weakened or disappear (this effect is called "high-temperature demagnetization"). Without the constraint of magnetic force, the movable magnetic member 400 will move downward along the arc channel 110 under the influence of gravity, so as to break the upper arc and prompt the upper arc to extinguish, achieving the effect of overall arc extinguishing.
[0058] After a single arc extinguishing is completed, when the temperature gradually decreases, the magnetic domains inside the magnet that have been briefly disrupted will gradually recover. After the magnetism of the magnet returns to normal, since the magnetic field generated by the first coil 210 disappears, the movable magnetic member 400 will re-hover in the middle of the magnetic induction arc extinguishing device 10 to welcome the next arc extinguishing action.
[0059] On this basis, as an implementation manner, the second magnetic member 300 may include a second magnet 320 and a second coil 310. Among them, the second coil 310 is wound around the second magnet 320, and the lower end of the second coil 310 is connected to the grounding electrode 520. Thus, when lightning enters the arc channel 110, the second coil 310 can also be energized, and finally the lightning current is safely introduced into the ground through the grounding electrode 520. Specifically, the second coil 310 may be provided with a second coil upper terminal 311 and a second coil lower terminal 312. Among them, the second coil upper terminal 311 can smoothly lead the current into the second coil 310, and flows out through the second coil lower terminal 312 connected to the grounding electrode 520, and finally guides the current to the ground.
[0060] Moreover, by setting the winding mode of the coil, the magnetic field generated after the second coil 310 is energized can be the same as the magnetic field generated by the second magnet 320. For example, taking the magnetic field generated by the second magnet 320 as the upper N pole and the lower S pole, the magnetic field generated after the second coil 310 is energized can also be the upper N pole and the lower S pole.
[0061] In this way, when no current passes through the second coil 310, the movable magnetic member 400 can still achieve force balance at both ends and hover in the middle of the arc channel 110. When a current passes through the second coil 310, a magnetic field in the same direction generated by electromagnetic induction of the second coil 310 can be superimposed on the original magnetic field direction of the second coil 310, thereby enhancing the original magnetic field intensity. Thus, when both the first coil 210 and the second coil 310 are energized, the movable magnetic member 400 can move upward along the arc channel 110 more quickly to elongate the lower arc, so as to ensure that the lower arc can be smoothly extinguished.
[0062] Similarly, a continuously increasing temperature will briefly disrupt the magnetic domains inside the magnet, so that the magnetism of the movable magnetic member 400 can be weakened or disappear briefly. At this time, the movable magnetic member 400 is only affected by gravity and will move downward along the arc channel 110, thereby breaking the upper arc and promoting the extinguishment of the upper arc, achieving the effect of overall arc extinguishment.
[0063] In some embodiments, the movable magnetic member 400 includes a third magnet and a graphene layer. Among them, in the direction of the arc channel 110, the polarities of the third magnet are opposite to those of the first magnet 220 and the second magnet 320. For example, both the first magnet 220 and the second magnet 320 are set as the upper N pole and the lower S pole, and the third magnet is set as the upper S pole and the lower N pole. Moreover, the surface of the third magnet is covered with a graphene layer.
[0064] With such a setting, the magnetism and stability of the third magnet can be enhanced through the special lattice structure of graphene. At the same time, the graphene layer can form a high-density, nanoscale protective film layer, which can effectively isolate oxygen and moisture, slow down the oxidation and corrosion of the third magnet. Moreover, the high strength and high flexibility of the graphene layer itself can also protect the surface of the third magnet from physical damage, extending its service life and stability.
[0065] As an implementation manner, an exhaust passage 120 can be formed on the housing 100, and the exhaust passage 120 can connect the arc passage 110 to the outside. Thus, during the process of introducing the lightning arc into the arc passage 110 for arc extinguishing, the gas in the arc passage 110 will be ionized and expanded to form a high-temperature environment. At this time, the high-temperature and high-pressure gas in the arc passage 110 can be discharged through the exhaust passage 120. In this way, the temperature and pressure in the arc passage 110 can be effectively reduced, which is beneficial to the restoration of the magnetic domains in the third magnetic member, enabling the magnetism of the third magnet to quickly return to normal and reset to the middle of the arc passage 110, waiting for the next arc extinguishing operation.
[0066] As an implementation manner, the exhaust passage 120 can include an upper exhaust passage 120 and a lower exhaust passage 120. Among them, the upper exhaust passage 120 can be located between the first magnetic member 200 and the movable magnetic member 400. The lower exhaust passage 120 can be located between the second magnetic member 300 and the movable magnetic member 400.
[0067] With such an arrangement, the multiple exhaust passages 120 can discharge the high-temperature and high-pressure gas inside the arc passage 110 faster. Moreover, since the movable magnetic member 400 is closely attached to the inner wall of the arc passage 110, the active magnetic member is equivalent to a "piston". When the movable magnetic member 400 slides upward along the arc passage 110, the gas between the movable magnetic member 400 and the first magnetic member 200 is compressed, which can accelerate the exhaust speed in the upper exhaust passage 120 and increase the intake speed of the lower exhaust passage 120. Similarly, when the movable magnetic member 400 slides downward along the arc passage 110, the gas between the movable magnetic member 400 and the second magnetic member 300 is compressed, which can accelerate the exhaust in the lower exhaust passage 120 and increase the intake speed of the upper exhaust passage 120.
[0068] As an implementation manner, from the arc passage 110 to the outer wall of the housing 100, the exhaust passage 120 can be arranged to slope downward. In this way, the exhaust passage 120 can be kept unobstructed, not easily blocked, and prevent external water vapor from entering the interior of the housing 100 through the exhaust passage 120.
[0069] In some embodiments, the arc passage 110 can be symmetrically arranged along the axis of the housing 100. Similarly, the exhaust passage 120 can also be symmetrically arranged along the axis of the housing 100 correspondingly.
[0070] Specifically, the upper exhaust passage 120 can include a first upper exhaust passage 121 and a second upper exhaust passage 122, and the first upper exhaust passage 121 and the second upper exhaust passage 122 are symmetrically arranged along the axis of the housing 100. As Figure 1As shown, the first upper exhaust passage 121 is disposed on the left side of the housing 100, and the second upper exhaust passage 122 is disposed on the right side of the housing 100. Moreover, from the arc passage 110 to the outer wall of the housing 100, both the first upper exhaust passage 121 and the second upper exhaust passage 122 are inclined downward.
[0071] Similarly, the lower exhaust passage 120 may include a first lower exhaust passage 123 and a second lower exhaust passage 124, and the first lower exhaust passage 123 and the second lower exhaust passage 124 are symmetrically arranged along the axis of the housing 100. As Figure 1 shown, the first lower exhaust passage 123 is disposed on the left side of the housing 100, and the second lower exhaust passage 124 is disposed on the right side of the housing 100. Moreover, from the arc passage 110 to the outer wall of the housing 100, both the first lower exhaust passage 123 and the second lower exhaust passage 124 are inclined downward.
[0072] With such an arrangement, it is convenient to process the housing 100, and it is not easy for water and dust to enter the housing 100. At the same time, it can also promote the uniform discharge of the high-temperature and high-pressure gas inside the arc passage 110 along the exhaust passages 120 that are symmetric on the left and right sides. Furthermore, the pressure borne by the housing 100 can be balanced, the accumulation of unilateral pressure can be avoided, the cooling efficiency of the internal passage can be improved, and thus the stability and efficiency of the magnetic induction arc extinguishing device 10 are enhanced.
[0073] Figure 2 This is a schematic structural diagram of an exhaust passage provided by an embodiment of the present application. Referring to Figure 2 shown, a moisture absorption layer 130 may be provided in the exhaust passage 120, and the moisture absorption layer 130 can be used to absorb the water vapor entering the exhaust passage 120. Exemplarily, the moisture absorption layer 130 may be closely attached to the inner wall of the exhaust passage 120 and disposed on the side close to the outer wall of the housing 100 to further reduce the risk of external water vapor entering the arc passage 110.
[0074] It can be understood that the specific material of the moisture absorption layer 130 is not limited herein, as long as it can achieve the moisture absorption function and can be reused after drying. For example, the moisture absorption layer 130 may be made of silica gel material or polyurethane sponge material.
[0075] In some embodiments, an arc absorption layer 140 may also be provided in the exhaust passage 120. The arc absorption layer 140 can prevent the arc inside the arc passage 110 from spraying out through the exhaust passage 120. Exemplarily, the arc absorption layer 140 may be closely attached to the inner wall of the exhaust passage 120 and disposed on the side close to the arc passage 110 to further reduce the risk of the arc spraying out through the exhaust passage 120.
[0076] With such a setting, even if part of the arc path changes and enters the exhaust passage 120, this part of the arc will first contact the arc absorption layer 140, and the arc absorption layer 140 is used to absorb the arc, achieving the effect of assisting in arc extinguishing and improving the safety of the overall device.
[0077] Exemplarily, the arc absorption layer 140 can be composed of any one or more of quartz, ceramics, polytetrafluoroethylene, silicon carbide, alumina, zinc oxide, etc. No specific limitation is made here.
[0078] Figure 3 This is a schematic structural diagram of another exhaust passage provided by an embodiment of the present application. Refer to Figure 3 As shown, the exhaust passage 120 can include a first straight section 125, an arc section 126, and a second straight section 127. The first straight section 125, the arc section 126, and the second straight section 127 are sequentially connected from the arc passage 110 to the outer wall of the housing 100. And the arc section 126 can protrude towards the top of the housing 100, or the arc section 126 can also protrude towards the bottom of the housing 100.
[0079] With such a setting, through the protrusion provided by the arc section 126, rainwater or water vapor can be prevented from flowing back into the arc passage 110, thereby improving the waterproof ability of the magnetic induction arc extinguishing device 10.
[0080] When an arc section is provided in the exhaust passage, when a moisture absorption layer and an arc absorption layer as described above are provided in the exhaust passage, refer to Figure 3 As shown, the moisture absorption layer 130 and the arc absorption layer 140 can both be provided in the arc section 126. Specifically, the moisture absorption layer 130 can be attached to the inner wall of the arc section 126 and disposed on the side close to the outer wall of the housing 100. The arc absorption layer 140 can be attached to the inner wall of the arc section 126 and disposed on the side close to the arc passage 110.
[0081] In other embodiments, the moisture absorption layer 130 and the arc absorption layer 140 can also be respectively provided in the second straight section 127 and the first straight section 125.
[0082] As an implementation manner, the cross-sectional dimension of the arc section 126 can be larger than the cross-sectional dimensions of the first straight section 125 and the second straight section 127. With such a setting, when the gas exits, the gas enters the arc section 126 with a larger cross-sectional dimension from the first straight section 125, which can reduce the influence of the connection bending part between the first straight section 125 and the arc section 126 on the gas outlet speed and ensure smooth gas outlet.
[0083] When the gas enters the second straight section 127 from the arc section 126 with a larger cross-sectional size, due to the smaller cross-sectional size of the second straight section 127, the high-temperature gas can stay in the arc section 126 for a longer time, thus playing a role in assisting the drying of the moisture absorption layer 130 inside the arc section 126.
[0084] Moreover, by utilizing the protrusion of the arc section 126 and in combination with the design that the cross-sectional size of the arc section 126 is larger than that of the first straight section 125 and the second straight section 127, the inner surface area of the moisture absorption layer 130 can be increased, enabling the moisture absorption layer 130 to have better moisture absorption capacity. Also, the channel at the connection bend of the first straight section 125 and the arc section 126 is enlarged, making it easier for the high-temperature gas to flow from the first straight section 125 into the arc section 126.
[0085] Figure 4 Schematic diagram of the connection between the magnetic induction arc extinguishing device and the insulator string provided by the embodiment of the present application. Refer to Figure 4 As shown, the magnetic induction arc extinguishing device 10 further includes an insulator string 20. On the one hand, the insulator string 20 can provide electrical insulation to prevent current from flowing into the ground through the electric pole or tower. On the other hand, the insulator string 20 can also provide mechanical support for the wire. The insulator string 20 can be connected to the magnetic induction arc extinguishing device 10 through a support frame. And, the insulator string 20 is connected in parallel with the magnetic induction arc extinguishing device 10, enabling it to discharge prior to the insulator string 20.
[0086] Exemplarily, the magnetic induction arc extinguishing device 10 as a whole can be columnar and can be installed on the support frame. Specifically, the support frame can include a first cross arm 31 and a second cross arm 32, and the first cross arm 31 and the second cross arm 32 are arranged side by side. The first cross arm 31 and the second cross arm 32 can be fixed to the electric pole through metal brackets and bolts. Both the magnetic induction arc extinguishing device 10 and the insulator string 20 are connected between the first cross arm 31 and the second cross arm 32. And, the magnetic induction arc extinguishing device 10 can be connected between the first cross arm 31 and the second cross arm 32 through a support rod 40. Specifically, the housing 100 of the magnetic induction arc extinguishing device 10 can be fixedly connected to the support rod 40 through fasteners to achieve the stable connection of the magnetic induction arc extinguishing device 10.
[0087] The working principle of the magnetic induction arc extinguishing device 10 provided by the present application is as follows:
[0088] When an overcurrent is generated by lightning strike, the arrester discharges 20 milliseconds earlier than the insulator string. The lightning arc is connected from the arc ignition electrode 510 to the upper terminal 211 of the first coil, and a lightning current is introduced into the first coil 210. Due to the right-hand grip rule, after the first coil 210 is energized, a magnetic field effect with an upper S pole and a lower N pole can be generated. After the second coil 310 is energized, a magnetic field effect with an upper N pole and a lower S pole can be generated. Based on the principle of like poles repelling and opposite poles attracting between magnets, the movable magnetic part 400 will move upward partially, thereby breaking the arc and achieving the effect of arc extinction.
[0089] When the temperature continues to rise, the high temperature will briefly disrupt the magnetic domains inside the magnet, resulting in a temporary weakening or disappearance of the magnetism of the movable magnetic part 400 (this effect is called "thermal demagnetization"). Without the restraint of magnetic force, due to the influence of gravity, it will move downward partially, thereby breaking the arc and achieving the effect of arc extinction.
[0090] After a single arc extinction, under the action of multiple exhaust channels 120, the temperature in the arc channel 110 will gradually decrease, and the magnetic domains inside the magnet of the movable magnetic part 400 that were temporarily disrupted will gradually recover. After the magnetism of the movable magnetic part 400 returns to normal, it will continue to return and hang at the middle position of the device to await the next action.
[0091] It should be noted that phrases such as "an embodiment", "embodiments", "exemplary embodiments", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when combining specific features, structures, or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures, or characteristics in combination with other embodiments, whether explicitly or implicitly described.
[0092] Generally speaking, terms should be understood at least partially by their use in context. For example, at least partially according to the context, the term "one or more" used in the text can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, at least partially according to the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.
[0093] It should be readily understood that the terms "on", "above", and "over" in this application should be construed in the broadest manner so that "on" not only means "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but may also include the meaning of "above" or "over something" with no intervening features or layers therebetween (i.e., directly on something).
[0094] In addition, for ease of description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to another as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or in other orientations), and the spatial relative descriptors used in the text may be interpreted accordingly as well.
[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A magnetic induction arc extinguishing device, characterized in that: include: The shell is provided with an arc channel, the top of the arc channel is provided with an arc-starting electrode, and the bottom of the arc channel is provided with a grounding electrode; A first magnetic member is disposed on the upper portion of the arc channel and is electrically connected to the arc striking electrode; a second magnetic member, disposed at a lower portion of the arc channel and connected to the ground electrode; A movable magnetic member, disposed between the first magnetic member and the second magnetic member, and movable along the arc channel; When there is no current in the arc channel, the movable magnetic component is suspended in the middle of the arc channel; when current is generated in the arc channel, the movable magnetic component slides up and down along the arc channel.
2. The magnetic induction arc extinguishing device according to claim 1, characterized in that: The first magnetic member includes a first magnet and a first coil, the first coil is wound around the first magnet, and the upper end of the first coil is connected to the arc-starting electrode; Furthermore, the first magnet and the movable magnetic part have the same magnetic pole polarity, the second magnetic part and the movable magnetic part have the same magnetic pole polarity, and the magnetic field generated by the first coil after power is supplied is opposite to the magnetic field generated by the first magnet.
3. The magnetic induction arc extinguishing device according to claim 2, characterized in that: The second magnetic member includes a second magnet and a second coil, the second coil is wound around the second magnet, and the lower end of the second coil is connected to the ground electrode; Furthermore, the magnetic field generated by the second coil after being energized is the same as the magnetic field generated by the second magnet.
4. The magnetic induction arc extinguishing device according to any one of claims 1 to 3, characterized in that: The movable magnetic component includes a third magnet and a graphene layer, and the graphene layer covers the surface of the third magnet.
5. The magnetic induction arc extinguishing device according to any one of claims 1 to 3, characterized in that: An exhaust channel is provided on the shell, and the exhaust channel connects the arc channel with the outside.
6. The magnetic induction arc extinguishing device according to claim 5, characterized in that: The exhaust passage comprises: an upper exhaust passage, located between the first magnetic member and the movable magnetic member; The lower exhaust channel is located between the second magnetic component and the movable magnetic component.
7. The magnetic induction arc extinguishing device according to claim 6, characterized in that: The exhaust channel is arranged to be inclined downward from the arc channel to the outer wall of the shell.
8. The magnetic induction arc extinguishing device according to claim 6, characterized in that: From the arc channel to the outer wall of the shell, the exhaust channel includes a first straight segment, an arc segment and a second straight segment connected in sequence, and the arc segment protrudes toward the top of the shell or the arc segment protrudes toward the bottom of the shell.
9. The magnetic induction arc extinguishing device according to claim 5, characterized in that: A moisture absorbing layer is provided in the exhaust passage; And / or, an arc absorption layer is provided in the exhaust channel.
10. The magnetic induction arc extinguishing device according to claim 1, characterized in that: Also includes: The insulator string is connected to the housing through a support frame.