CN105280431A - Grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension - Google Patents
Grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension Download PDFInfo
- Publication number
- CN105280431A CN105280431A CN201510680663.7A CN201510680663A CN105280431A CN 105280431 A CN105280431 A CN 105280431A CN 201510680663 A CN201510680663 A CN 201510680663A CN 105280431 A CN105280431 A CN 105280431A
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- China
- Prior art keywords
- push rod
- insulating sleeve
- magnetic disk
- permanent magnetic
- electromagnetic reluctance
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension. The grounding switch comprises a fixed contact and a moving contact of which abutting ends are arranged in a vacuum arc-extinguishing chamber, and further comprises an electromagnetic reluctance tension mechanism connected with the moving contact; the electromagnetic reluctance tension mechanism is composed of a terraced push rod, a metal disk and a permanent magnet disk both arranged on a large-diameter section of the push rod in a sleeve manner, a cylindrical magnetizer fixedly arranged at one end of a small-diameter section of the push rod, a hollow cylindrical insulating sleeve with a ring slot, and a yoke circularly arranged at periphery of the cylindrical insulating sleeve, wherein the large-diameter section of the push rod is connected with the moving contact, the metal disk is located above the permanent magnet disk and is attracted together with the permanent magnet disk, and the cylindrical magnetizer is located at the hollow position of the cylindrical insulating sleeve; and the grounding switch further comprises a hollow permanent magnet disk support plate of which the upper side fixes the permanent magnet disk, and a gap part between the permanent magnet disk support plate and the metal disk is provided with a plurality of compressed energy storage springs. The grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension is simple in structure and relatively low-cost, performs switch-on action very quickly, has high arc-extinguishing capability, and can switch on large current.
Description
Technical field
The present invention relates to high-voltage switch gear technical field, particularly a kind of for there is in Cubicle Gas-Insulated Switchgear Secondary Arc Extinction, closing short circuit current ability and the electromagnetic reluctance pulling force fast arc extinction earthed switch of energy Reusability.
Background technology
Earthed switch is a kind of very important power equipment in electric power system, and it is divided into open type and closed two kinds of structures.The grounding switch being similar to isolating switch of open type, it is directly exposed in air; Enclosed is be immersed in dielectrics such as being full of SF6, insulating oil and vacuum.Closed earthed switch also can be divided into two kinds, namely common earthed switch and high speed grounding switch, high speed grounding switch has two main applications: one is to close big current, especially short-circuit current can repeatedly be closed and not damaged, the essence of its work is that the open electric arc of fault point is converted into compressibility electric arc in switch, flow through electric current only hundreds of peace of switch, easily cut-off, general device for switching equipment there will be enclosure insulator creepage phenomenon or enclosure arcing fault because of Insulation Problems, arc fault can cause serious destruction, such as internal pressure, temperature sharply rises, local temperature can reach 20000 degrees Celsius, gasification/the detonation of metal and insulating material, object splash and toxic gas release, the injury of operating maintenance personnel and the damage of switchgear, threaten power network safety operation, conventional method generally adopts higher level's breaker open operation to reach arc quenching effect, but arc extinguishing slow motion, quenching time is long, extinguish arcs in rear 30ms-40ms is there is in it at arc fault, cannot the timely and effective protection person and switchgear safety, occur at present adopting fast arc extinction device to provide more protection for switchgear, can better the timely and effective protection person and switchgear safety, two is high speed grounding switches is a kind of effective ways of Secondary Arc Extinction, extra high voltage network more than 90% fault is single phase ground fault, and the fault of about 80% is " instantaneity " fault in single phase ground fault, at China 330kV, 500kV circuit adopts single-pole reclosing to eliminate single phase ground fault mostly, improve the stability of system and the reliability of power supply, the success or not of single-pole reclosing depends on that can the latent of fault point put out certainly for electric arc, 220kV and the latent of following transmission line all can fast from going out within the restriction time limit for electric arc, it can not hinder the application of quick single phase autoreclosing, 330kV and above transmission line, it is dived generally can not fast from going out for electric arc, so will high speed grounding switch be adopted, it reduces the secondary arc current of fault point greatly, restriction recovery voltage, thus electric arc is easily extinguished, its arc extinguishing operate time is 4ms-8ms.High speed grounding switch is when mesohigh equipment generation interior unit cell model being detected as can be seen here, by direct for system three-phase ground short circuit, extinguish fast fault electric arc, when at circuit when detecting that single-phase fault occurs, high speed grounding switch more can action rapidly (ground connection), just can more early Secondary Arc Extinction, more promptly the arcing time be can reduce, so just the stability of system and the reliability of power supply more can be improved.So expect here utilizing the QA feature of high speed magnetic resistance tensile machine energy; be used as the switch drive of high speed grounding switch; improve the responsiveness of high speed grounding switch; guarantee at short notice arc fault short circuit to be become metallic short circuit or Secondary Arc Extinction, protect electric power system and equipment and personal safety better.
At present, fault electric arc short circuit can be extinguished by the fast vacuum earthed switch of spy developed as ABB AB is up-to-date of high speed grounding switch that research field occurs in 1.5ms, but the pushing mechanism of this device uses Mini-generator for gas, whole device for once useful life and expensive, significantly limit the promotion and application of this series products.Based on the high speed grounding switch of electromagnetic eddy repulsive force mechanism, requirement can be reached in folding speed, but due to drive coil and actuating copper dish inherent structure, if without effective location, close at a high speed the impact that produces in process by extreme influence moving contact centering at high speed grounding switch.
Summary of the invention
The object of the present invention is to provide the electromagnetic reluctance pulling force fast arc extinction earthed switch that a kind of arc extinguishing operate time is extremely short, can 2 weak points of above-mentioned prior art be solved, there is Secondary Arc Extinction, close short circuit current ability and insulation is reliable, centering is good, efficiency of assembling is high.
For achieving the above object, technical scheme of the present invention is: a kind of electromagnetic reluctance pulling force fast arc extinction earthed switch, comprise fixed contact, the moving contact be oppositely arranged with described fixed contact, described fixed contact is coated on vacuum extinction indoor with the end of docking of moving contact, described fixed contact is connected with high voltage bus, described moving contact is connected with earth bus, also comprise the electromagnetic reluctance tensile machine be connected with described moving contact, described electromagnetic reluctance tensile machine is by stair-stepping push rod, be sheathed on metal dish and the permanent magnetic disk of push rod large footpath section, be fixedly arranged on the cylindrical magnetic conductor of push rod path section one end, hollow belt annular groove cylindrical insulating sleeve cylinder and be located on cylindrical insulating sleeve cylinder periphery yoke composition, described push rod large footpath section is connected with moving contact, described metal dish to be positioned at above permanent magnetic disk and with the adhesive of permanent magnetic disk phase, described cylindrical magnetic conductor is positioned at the hollow position of described cylindrical insulating sleeve cylinder, the annular groove place of cylindrical insulating sleeve cylinder is also equipped with coil tube, this coil tube and an accumulator are connected in series, described yoke envelopes described coil tube, also comprise the hollow permanent magnetic disk fagging fixing described permanent magnetic disk on the upside of in the of, the gap between this permanent magnetic disk fagging and metal dish is provided with some energy-stored springs by compression.
In an embodiment of the present invention, described fixed contact is fixedly installed on upper bracket plate, described electromagnetic reluctance tensile machine is arranged in lower support plate, described upper bracket plate is connected with lower support plate through some insulated tension poles, middle baffle plate is fixedly installed between described insulated tension pole, arc control device supporting bracket and described permanent magnetic disk fagging, described metal dish is positioned at below described middle baffle plate, silica gel buffer substrate tablet is provided with on the downside of described middle baffle plate, described vacuum interrupter is arranged in described arc control device supporting bracket, described cylindrical insulating sleeve cylinder is fixed in described lower support plate.
In an embodiment of the present invention, described energy-stored spring and permanent magnetic disk form maintaining body, and coefficient of elasticity and the permanent magnetic disk magnetic force size of energy-stored spring adapt, and make dynamic and static contact be stabilized in separating brake or closing position.
In an embodiment of the present invention, described coil tube is coiled into through the tight spiral in the same way of a fixing turn layering by enamel covered wire, described cylindrical magnetic conductor, coil tube, cylindrical insulating sleeve cylinder form quick acting actuating unit jointly, and the hollow channel of described cylindrical insulating sleeve cylinder can move up and down for cylindrical magnetic conductor.
In an embodiment of the present invention, axle center, described cylindrical magnetic conductor upper end has screwed hole, to be fastenedly connected with screw thread position, push rod path section lower end, the lower end of described cylindrical insulating sleeve cylinder is provided with air vent hole, to eliminate atmospheric pressure impact, the bottom of described cylindrical insulating sleeve cylinder has some screwed holes, to be fixed in described lower support plate, the side at described cylindrical magnetic conductor annular groove place is provided with wire lead slot, enamel covered wire line end for described coil tube draws entry/exit, be beneficial to minimizing enamel covered wire line end and take coil tube principal space because line extrudes, described yoke is made up of symmetrical two pieces of middle trough of belt semicolumn electrical pure iron covers, can closely wrap described coil tube.
In an embodiment of the present invention, described yoke and cylindrical magnetic conductor, air gap form magnetic conductive loop jointly, prevent magnetic field from spreading, and strengthen magnetic field, improve quick acting actuating unit intensity and efficiency.
In an embodiment of the present invention, described tank circuit is formed by storage capacitor, thyristor and resistant series, and described resistance is made up of storage capacitor dead resistance and turn on thyristors resistance; Described storage capacitor is single electrolytic capacitor or multiple electrolytic capacitor group, the shock-resistant current power electronic switching device of described thyristor replaceable one-tenth full-control type.
In an embodiment of the present invention, described permanent magnetic disk is made up of magnetic conductive disk and the permanent magnet be arranged in magnetic conductive disk, and described magnetic conductive disk and the metal dish above it form closed magnetic loop, have fixedly attracted the metal dish by described energy-stored spring elastic force.
In an embodiment of the present invention, described metal dish is excellent by magnetic property, the silicon steel that hardness strength is high and electrical pure iron material are made, it is fixed in the section of push rod large footpath through thread mechanism, move axially up and down together with push rod, keep medium as dynamic and static Contact Breaking/Making Operations lock state together with permanent magnetic disk, intermediate insulation baffle plate, spring, silica gel piece etc.
In an embodiment of the present invention, the guide pin bushing that footpath large with push rod section matches is provided with in the middle through-hole of described permanent magnetic disk, the hollow via-hole of permanent magnetic disk fagging and the middle through-hole of middle baffle plate.
Compared to prior art, the present invention has following beneficial effect: electromagnetic reluctance pulling force fast arc extinction construction of switch of the present invention is simple, cost is lower, arc extinguishing action is fast and centering is better, fixed contact and moving contact is made to complete feed motion within the enough short time by electromagnetic reluctance tensile machine, this electromagnetic reluctance pulling force quick actuating technology belongs to pioneering at home, can significantly improve switch cubicle to the protective capacities of internal arc can reduce superhigh pressure secondary arc current and limit recovery voltage, more timely, more effective protection switch equipment, personal safety and power network safety operation, greatly reduce equipment interruption duration and maintenance cost, at utmost reduce the release of arcing gas and limit secondary arc current to the impact of automatic reclosing.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of electromagnetic reluctance pulling force fast arc extinction earthed switch provided by the invention.
Fig. 2 is that the present invention is as the polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder in the electromagnetic reluctance tensile machine of core.
Fig. 3 is that the present invention is as the structural representation after the polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder winding around in the electromagnetic reluctance tensile machine of core.
Fig. 4 is that the present invention is as magnetic conductor initial position schematic diagram in the polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder in the electromagnetic reluctance tensile machine of core.
Fig. 5 is that magnetic conductor is subject to coil magnetic resistance pulling force principle schematic.
In figure: 1-bolt, 2-upper bracket plate, 3-jump ring, 4-high voltage bus, 5-insulated tension pole, 6-fixed contact, 7-arc control device supporting bracket, 8-moving contact, 9-earth bus, 10-middle baffle plate, 11-silica gel buffer substrate tablet, 12-spring card slot, 13-energy-stored spring, 14-vacuum interrupter, 16-metal dish, 17-permanent magnetic disk, 17-1-magnetic conductive disk, 17-2-permanent magnet, 18-lower support plate, 19-hollow belt annular groove cylindrical insulating sleeve cylinder, 19-1-hollow channel, 19-2-cannelure, 19-3-cylindrical insulating sleeve cylinder, 19-4-wire lead slot, 19-5-air vent hole, 20-enamel wire coil, 21-cylindrical magnetic conductor, 22-push rod, 23-guide pin bushing, 24-permanent magnetism disk fagging, 25-yoke.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is specifically described.
A kind of electromagnetic reluctance pulling force fast arc extinction earthed switch of the present invention, comprise fixed contact, the moving contact be oppositely arranged with described fixed contact, described fixed contact is coated on vacuum extinction indoor with the end of docking of moving contact, described fixed contact is connected with high voltage bus, described moving contact is connected with earth bus, also comprise the electromagnetic reluctance tensile machine be connected with described moving contact, described electromagnetic reluctance tensile machine is by stair-stepping push rod, be sheathed on metal dish and the permanent magnetic disk of push rod large footpath section, be fixedly arranged on the cylindrical magnetic conductor of push rod path section one end, hollow belt annular groove cylindrical insulating sleeve cylinder and be located on cylindrical insulating sleeve cylinder periphery yoke composition, described push rod large footpath section is connected with moving contact, described metal dish to be positioned at above permanent magnetic disk and with the adhesive of permanent magnetic disk phase, described cylindrical magnetic conductor is positioned at the hollow position of described cylindrical insulating sleeve cylinder, the annular groove place of cylindrical insulating sleeve cylinder is also equipped with coil tube, this coil tube and an accumulator are connected in series, described yoke envelopes described coil tube, also comprise the hollow permanent magnetic disk fagging fixing described permanent magnetic disk on the upside of in the of, the gap between this permanent magnetic disk fagging and metal dish is provided with some energy-stored springs by compression.
Described fixed contact is fixedly installed on upper bracket plate, described electromagnetic reluctance tensile machine is arranged in lower support plate, described upper bracket plate is connected with lower support plate through some insulated tension poles, middle baffle plate, arc control device supporting bracket and described permanent magnetic disk fagging is fixedly installed between described insulated tension pole, described metal dish is positioned at below described middle baffle plate, silica gel buffer substrate tablet is provided with on the downside of described middle baffle plate, described vacuum interrupter is arranged in described arc control device supporting bracket, and described cylindrical insulating sleeve cylinder is fixed in described lower support plate.Described energy-stored spring and permanent magnetic disk form maintaining body, and coefficient of elasticity and the permanent magnetic disk magnetic force size of energy-stored spring adapt, and make dynamic and static contact be stabilized in separating brake or closing position.
Described coil tube is coiled into through the tight spiral in the same way of a fixing turn layering by enamel covered wire, described cylindrical magnetic conductor, coil tube, cylindrical insulating sleeve cylinder form quick acting actuating unit jointly, and the hollow channel of described cylindrical insulating sleeve cylinder can move up and down for cylindrical magnetic conductor.Axle center, described cylindrical magnetic conductor upper end has screwed hole, to be fastenedly connected with screw thread position, push rod path section lower end, the lower end of described cylindrical insulating sleeve cylinder is provided with air vent hole, to eliminate atmospheric pressure impact, the bottom of described cylindrical insulating sleeve cylinder has some screwed holes, to be fixed in described lower support plate, the side at described cylindrical magnetic conductor annular groove place is provided with wire lead slot, enamel covered wire line end for described coil tube draws entry/exit, be beneficial to minimizing enamel covered wire line end and take coil tube principal space because line extrudes, described yoke is made up of symmetrical two pieces of middle trough of belt semicolumn electrical pure iron covers, can closely wrap described coil tube.Described yoke and cylindrical magnetic conductor, air gap form magnetic conductive loop jointly, prevent magnetic field from spreading, and strengthen magnetic field, improve quick acting actuating unit intensity and efficiency.Described tank circuit is formed by storage capacitor, thyristor and resistant series, and described resistance is made up of storage capacitor dead resistance and turn on thyristors resistance; Described storage capacitor is single electrolytic capacitor or multiple electrolytic capacitor group, the shock-resistant current power electronic switching device of described thyristor replaceable one-tenth full-control type.
Described permanent magnetic disk is made up of magnetic conductive disk and the permanent magnet be arranged in magnetic conductive disk, and described magnetic conductive disk and the metal dish above it form closed magnetic loop, have fixedly attracted the metal dish by described energy-stored spring elastic force.Described metal dish is excellent by magnetic property, the silicon steel that hardness strength is high and electrical pure iron material are made, it is fixed in the section of push rod large footpath through thread mechanism, move axially up and down together with push rod, keep medium as dynamic and static Contact Breaking/Making Operations lock state together with permanent magnetic disk, intermediate insulation baffle plate, spring, silica gel piece etc.The guide pin bushing that footpath large with push rod section matches is provided with in the middle through-hole of described permanent magnetic disk, the hollow via-hole of permanent magnetic disk fagging and the middle through-hole of middle baffle plate.
For better telling about the present invention, below in conjunction with accompanying drawing, technical solution of the present invention is specifically described.
With reference to figure 1-5, a kind of electromagnetic reluctance pulling force of the present invention fast arc extinction switch, comprise high voltage bus 4, earth bus 9, vacuum interrupter 14, fixed contact 6, the moving contact 8 corresponding with fixed contact 6 and with the electromagnetic reluctance tensile machine of moving contact 8 Joint and peripheral support framework, described fixed contact 6 upper end connects high voltage bus 4, described moving contact 8 connects earth bus 9, described electromagnetic reluctance tensile machine comprises large footpath section and path section by stair-stepping push rod 22(), be sheathed on the permanent magnetic disk 17 of push rod 22 large footpath section, be sheathed on the metal dish 16 of push rod 22 large footpath section, energy-stored spring 13 and be fixedly arranged on the cylindrical magnetic conductor 21 of push rod 22 path section by compression, polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder 19, yoke 25 forms.Described permanent magnetic disk 17 is made up of the magnetic conductive disk 17-1 of groove built with permanent magnet 17-2, it is fixed on permanent magnetism disk fagging 24, and outside is dispersed with four energy-stored springs 13 by compression, described metal dish 16 is that the magnetic conduction such as silicon steel or electrical pure iron is good, hardness height material is made, it is positioned at permanent magnetic disk 17 top and permanent magnetic disk 17 phase adhesive (initial position), and be provided with silica gel buffer substrate tablet 11 bottom fixed dam 10 above it, described push rod 22 large footpath section is connected with moving contact 6, described push rod 22 path section end arranges helicitic texture and is connected with cylindrical shape magnetic conductor 21, described cylindrical magnetic conductor 21 is silicon steel, the superior material of the magnetic properties such as amorphous, described coil tube 20 layered windings is in the cannelure 19-2 of hollow belt annular groove cylindrical insulating sleeve cylinder 19, and be connected in series in tank circuit, described polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder 19 is fixed in lower support plate 18, described yoke 25 is made up of symmetrical two pieces of middle trough of belt semicolumn electrical pure iron covers.
In the present embodiment, described fixed contact 6 is fixedly installed on upper bracket plate 2, described fixed contact is fixed jump ring 3 and is arranged on the upside of upper bracket plate 2, described electromagnetic reluctance tensile machine is arranged in lower support plate 18, described upper bracket plate 2 to be connected with lower support plate 18 through four insulated tension poles 5 and to be configured to rectangular shape, be fixedly installed middle baffle plate 10, arc control device supporting bracket 7 and permanent magnetic disk supporting bracket 24 between described insulated tension pole 5, described vacuum interrupter 14 is arranged in arc control device supporting bracket 7, permanent magnetic disk 17 is fixed on respective support plate 24 upper side.
In the present embodiment, described energy-stored spring 13 and permanent magnetic disk 17 form maintaining body, and energy-stored spring 13 coefficient of elasticity and permanent magnetic disk 17 magnetic force size adapt, and make the dynamic and static contact of switch be stabilized in separating brake or closing position.
In the present embodiment, described cylindrical magnetic conductor 21, coil tube 20, polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder 19 forms quick acting actuating unit jointly, certain depth screwed hole is opened in axle center, described cylindrical magnetic conductor 21 upper end, be fastenedly connected with screw thread position, push rod 22 path section lower end, described coil tube 20 is coiled into by enamel covered wire through the tight spiral in the same way of specific number of turns layering and is connected with accumulator, described polyethylene hollow belt annular groove cylindrical insulating sleeve cylinder 19 axle center hollow channel 19-1 can run for magnetic conductor about 21, top layer cannelure 19-2 supplies coil 20 around knot, and rise fixing, support coils cylinder 20 acts on, its lower side has air vent hole 19-5 can eliminate atmospheric pressure impact, some screwed holes are opened to be fixed in lower support plate 18 in bottom, described cannelure side is provided with wire lead slot 19-4 and introduces (going out) for enamelled wire line end, thus be beneficial to and reduce the extruding of enamelled wire end line and take coil tube 20 principal space, described yoke 25 is made up of symmetrical two pieces of middle trough of belt semicolumn electrical pure iron covers, can closely wrap coil tube 20 side and partial cross section thereof.
In the present embodiment, the butt end of described fixed contact 6 and moving contact 8 is all coated in vacuum interrupter 14, and moving contact 8 can free-running operation.
In the present embodiment, described permanent magnetic disk 17 is made up of magnetic conductive disk 17-2 and the permanent magnet 17-1 be arranged in magnetic conductive disk 17-2, the metal dish 16 of described magnetic conductive disk 17-2 and upper end forms closed magnetic loop, fixedly attracted the metal dish 16 that spring 13 is by compression oppressed, described spring 13 coefficient of elasticity and permanent magnetic disk 17 magnetic force size are got adaptive optimal control and are combined through testing to seek and rationally run for maintaining body.Described metal dish 16 is excellent by magnetic property, the silicon steel that hardness strength is high and electrical pure iron material are made, it is fixed in the section of push rod 22 large footpath through thread mechanism, move axially up and down together with push rod 22, keep medium as dynamic and static Contact Breaking/Making Operations lock state together with permanent magnetic disk 17, intermediate insulation baffle plate 10, spring 13, silica gel piece 11 etc.
In the present embodiment, the guide pin bushing 23 matched with push rod 22 large footpath section is provided with in described permanent magnetic disk 17 and intermediate insulation baffle plate 10 middle through-hole, the short circuit grounding assembly of described moving contact 8, push rod 22, metal dish 16 and earth bus 9 composition is arranged in guide pin bushing 23, freely can move up and down in guide pin bushing 23.
In the present embodiment, described tank circuit is in series by storage capacitor C, thyristor SCR and resistance R, and described resistance R is made up of storage capacitor C dead resistance and thyristor SCR conducting resistance.Described storage capacitor C is single electrolytic capacitor or multiple electrolytic capacitor group composition, described half control type thyristor SCR component replaceable becomes the shock-resistant current power electronic switching device of full-control type, as IGBT module, coil tube 20 resistance, inductance do not identify separately herein, replace with coil tube 20 self.
In the present embodiment, described yoke 25 is made up of the electrical pure iron that magnetic property is superior, closely wraps coil tube 20, and jointly form magnetic conductive loop with cylindrical magnetic conductor 21, air gap, prevent magnetic field from spreading, strengthen magnetic field, improve quick acting laser intensity and efficiency.
In the present embodiment, the quick tensile machine that described magnetic conductor 21 and coil tube 20 are formed utilizes magnetic resistance minimum principle, namely magnetic conductor always has the trend (being subject to reducing towards magnetic resistance the pulling force in direction) reducing direction motion towards magnetic resistance, no matter pass into which kind of electric current (AC and DC to coil 20, pulse current), which kind of directional current, magnetic conductor 21 center is moved towards coil 20 center all the time, coil 20 center is crossed once magnetic conductor 21, coil 20 is also charged, so will form counter pull and hinder magnetic conductor 21 to continue to move in the same way.The present invention needs quick acting, therefore selects to pass into pulse current, can complete divide-shut brake actuating within the extremely short time.
As shown in Figure 5, wherein, magnetic conductor 21 be centrally located at A and A ' time, switch is in separating brake respectively, "on" position, operation principle of the present invention is as follows: be in sub-gate position after the assembling of this electromagnetic reluctance pulling force fast arc extinction earthed switch, and magnetic conductor 21 is centrally located at coil 20 central lower appropriate location, first storage capacitor C is charged to appropriate voltage level during work, then thyristor SCR is triggered by controlling triggering signal, after thyristor SCR conducting, storage capacitor C was discharged to coil 20 by discharge loop moment, now coil tube 20 is axially producing the magnetic field increased rapidly, according to magnetic resistance minimum principle, magnetic conductor 21 is subject to very large electromagnet pull, direction and coil 20 center high-speed motion can be reduced immediately towards magnetic resistance, and promote moving contact 8 and move upward at a high speed, feed motion is completed within the extremely short time.After moving contact 8 making process and combined floodgate put in place, upspring by energy-stored spring 13 local by compression, (now permanent magnetic disk is because of larger with the gap of metal dish to keep enough strong support force, to metal dish without too large the suction-combining force), this support force passes to moving contact 8 by push rod 22, enough contact forces (contacting with silica gel buffer substrate tablet on the upside of metal dish) are produced between dynamic and static contact, enable switch carry rated short circuit current or secondary arc current, and now magnetic conductor 21 is centrally located at coil 20 overcentre appropriate location.And when needs switch separating brake, only need again for the storage capacitor C after charging discharges, coil tube 20 is axially producing the magnetic field increased rapidly, and equally according to magnetic resistance minimum principle, magnetic conductor 21 is subject to very large electromagnet pull, direction and coil 20 center high-speed motion can be reduced immediately towards magnetic resistance, and promote moving contact 8 and move downward at a high speed, within the extremely short time, complete separating brake action, simultaneously because of permanent magnetic disk and metal dish close, make permanent magnetic disk adhesive metal dish, keep gate-dividing state.
Above-mentioned describing is as preferred embodiment of the present invention.The researcher in this field is deserved is the present invention is described and is not used to limit the patent right scope that the present invention advocates to understand it.Its scope of patent protection when depending on accompanying application range and etc. same domain.All researchers being familiar with this field, not departing from this patent spirit or scope, the change done or retouching, the equivalence completed under all belonging to disclosed spirit changes or design, and should be included in above-mentioned claim.
Claims (10)
1. an electromagnetic reluctance pulling force fast arc extinction earthed switch, comprise fixed contact, the moving contact be oppositely arranged with described fixed contact, described fixed contact is coated on vacuum extinction indoor with the end of docking of moving contact, described fixed contact is connected with high voltage bus, described moving contact is connected with earth bus, it is characterized in that: also comprise the electromagnetic reluctance tensile machine be connected with described moving contact, described electromagnetic reluctance tensile machine is by stair-stepping push rod, be sheathed on metal dish and the permanent magnetic disk of push rod large footpath section, be fixedly arranged on the cylindrical magnetic conductor of push rod path section one end, hollow belt annular groove cylindrical insulating sleeve cylinder and be located on cylindrical insulating sleeve cylinder periphery yoke composition, described push rod large footpath section is connected with moving contact, described metal dish to be positioned at above permanent magnetic disk and with the adhesive of permanent magnetic disk phase, described cylindrical magnetic conductor is positioned at the hollow position of described cylindrical insulating sleeve cylinder, the annular groove place of cylindrical insulating sleeve cylinder is also equipped with coil tube, this coil tube and an accumulator are connected in series, described yoke envelopes described coil tube, also comprise the hollow permanent magnetic disk fagging fixing described permanent magnetic disk on the upside of in the of, the gap between this permanent magnetic disk fagging and metal dish is provided with some energy-stored springs by compression.
2. electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1, it is characterized in that: described fixed contact is fixedly installed on upper bracket plate, described electromagnetic reluctance tensile machine is arranged in lower support plate, described upper bracket plate is connected with lower support plate through some insulated tension poles, middle baffle plate is fixedly installed between described insulated tension pole, arc control device supporting bracket and described permanent magnetic disk fagging, described metal dish is positioned at below described middle baffle plate, silica gel buffer substrate tablet is provided with on the downside of described middle baffle plate, described vacuum interrupter is arranged in described arc control device supporting bracket, described cylindrical insulating sleeve cylinder is fixed in described lower support plate.
3. electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1, it is characterized in that: described energy-stored spring and permanent magnetic disk form maintaining body, coefficient of elasticity and the permanent magnetic disk magnetic force size of energy-stored spring adapt, and make dynamic and static contact be stabilized in separating brake or closing position.
4. electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1, it is characterized in that: described coil tube is coiled into through the tight spiral in the same way of a fixing turn layering by enamel covered wire, described cylindrical magnetic conductor, coil tube, cylindrical insulating sleeve cylinder form quick acting actuating unit jointly, and the hollow channel of described cylindrical insulating sleeve cylinder can move up and down for cylindrical magnetic conductor.
5. electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 4, it is characterized in that: axle center, described cylindrical magnetic conductor upper end has screwed hole, to be fastenedly connected with screw thread position, push rod path section lower end, the lower end of described cylindrical insulating sleeve cylinder is provided with air vent hole, to eliminate atmospheric pressure impact, the bottom of described cylindrical insulating sleeve cylinder has some screwed holes, to be fixed in described lower support plate, the side at described cylindrical magnetic conductor annular groove place is provided with wire lead slot, enamel covered wire line end for described coil tube draws entry/exit, be beneficial to minimizing enamel covered wire line end and take coil tube principal space because line extrudes, described yoke is made up of symmetrical two pieces of middle trough of belt semicolumn electrical pure iron covers, can closely wrap described coil tube.
6. the electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1 to 5 any one, it is characterized in that: described yoke and cylindrical magnetic conductor, air gap form magnetic conductive loop jointly, prevent magnetic field from spreading, strengthen magnetic field, improve quick acting actuating unit intensity and efficiency.
7. the electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1 to 5 any one, it is characterized in that: described tank circuit is formed by storage capacitor, thyristor and resistant series, described resistance is made up of storage capacitor dead resistance and turn on thyristors resistance; Described storage capacitor is single electrolytic capacitor or multiple electrolytic capacitor group, the shock-resistant current power electronic switching device of described thyristor replaceable one-tenth full-control type.
8. the electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1 to 5 any one, it is characterized in that: described permanent magnetic disk is made up of magnetic conductive disk and the permanent magnet be arranged in magnetic conductive disk, described magnetic conductive disk and the metal dish above it form closed magnetic loop, have fixedly attracted the metal dish by described energy-stored spring elastic force.
9. the electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 1 to 5 any one, it is characterized in that: described metal dish is excellent by magnetic property, the silicon steel that hardness strength is high and electrical pure iron material are made, it is fixed in the section of push rod large footpath through thread mechanism, move axially up and down together with push rod, keep medium as dynamic and static Contact Breaking/Making Operations lock state together with permanent magnetic disk, intermediate insulation baffle plate, spring, silica gel piece etc.
10. electromagnetic reluctance pulling force fast arc extinction earthed switch according to claim 2, is characterized in that: be provided with the guide pin bushing that footpath large with push rod section matches in the middle through-hole of described permanent magnetic disk, the hollow via-hole of permanent magnetic disk fagging and the middle through-hole of middle baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510680663.7A CN105280431B (en) | 2015-10-21 | 2015-10-21 | Electromagnetic reluctance pulling force fast arc extinction earthed switch |
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| CN107386972A (en) * | 2017-08-21 | 2017-11-24 | 福建亿钻机械有限公司 | It is a kind of can protection against electric shock horizontal directional drilling machine and horizontal orientation get into the cave method |
| CN107833787A (en) * | 2016-08-21 | 2018-03-23 | 盛欢欢 | High-pressure vacuum breaker |
| CN108538680A (en) * | 2017-03-03 | 2018-09-14 | 株式会社日立产机系统 | Vacuum circuit breaker |
| CN109416993A (en) * | 2016-07-06 | 2019-03-01 | 西门子股份公司 | Switch with arc-control device |
| CN110718856A (en) * | 2019-09-20 | 2020-01-21 | 陆红阳 | Join in marriage net automatic arc control device |
| CN111029209A (en) * | 2020-01-17 | 2020-04-17 | 福州大学 | Single-phase medium-voltage quick grounding switch based on electric gun principle |
| CN111462989A (en) * | 2020-04-27 | 2020-07-28 | 扬州中恒电气有限公司 | Secondary grounding protection device of voltage transformer |
| CN113380587A (en) * | 2021-06-25 | 2021-09-10 | 江西师范高等专科学校 | Intelligent switch based on Internet of things |
| CN113826183A (en) * | 2019-03-18 | 2021-12-21 | 伊顿智能动力有限公司 | Switching device for quickly interrupting short-circuit current |
| CN114203475A (en) * | 2021-12-03 | 2022-03-18 | 北京中车赛德铁道电气科技有限公司 | Grounding switch with reinforced insulation moving and static contact structure |
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| US10600588B2 (en) | 2016-07-06 | 2020-03-24 | Siemens Aktiengesellschaft | Switch having an arc-quenching device |
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| CN109416993A (en) * | 2016-07-06 | 2019-03-01 | 西门子股份公司 | Switch with arc-control device |
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| CN108538680B (en) * | 2017-03-03 | 2019-12-03 | 株式会社日立产机系统 | Vacuum circuit breaker |
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| CN113826183A (en) * | 2019-03-18 | 2021-12-21 | 伊顿智能动力有限公司 | Switching device for quickly interrupting short-circuit current |
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| US11875959B2 (en) | 2019-03-18 | 2024-01-16 | Eaton Intelligent Power Limited | Switching device for fast disconnection of short-circuit currents |
| CN110718856A (en) * | 2019-09-20 | 2020-01-21 | 陆红阳 | Join in marriage net automatic arc control device |
| CN111029209A (en) * | 2020-01-17 | 2020-04-17 | 福州大学 | Single-phase medium-voltage quick grounding switch based on electric gun principle |
| CN111462989A (en) * | 2020-04-27 | 2020-07-28 | 扬州中恒电气有限公司 | Secondary grounding protection device of voltage transformer |
| CN113380587A (en) * | 2021-06-25 | 2021-09-10 | 江西师范高等专科学校 | Intelligent switch based on Internet of things |
| CN114203475A (en) * | 2021-12-03 | 2022-03-18 | 北京中车赛德铁道电气科技有限公司 | Grounding switch with reinforced insulation moving and static contact structure |
| CN117031098A (en) * | 2023-10-10 | 2023-11-10 | 江苏盛德电子仪表有限公司 | Energy-saving ammeter |
| CN117031098B (en) * | 2023-10-10 | 2023-12-08 | 江苏盛德电子仪表有限公司 | Energy-saving ammeter |
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