CN102983017A - Three-position switch - Google Patents
Three-position switch Download PDFInfo
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- CN102983017A CN102983017A CN2012104917237A CN201210491723A CN102983017A CN 102983017 A CN102983017 A CN 102983017A CN 2012104917237 A CN2012104917237 A CN 2012104917237A CN 201210491723 A CN201210491723 A CN 201210491723A CN 102983017 A CN102983017 A CN 102983017A
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Abstract
The invention discloses a three-position switch. The switch comprises a vacuum extinction chamber and a tristable permanent magnetic operating mechanism, wherein the vacuum extinction chamber and the tristable permanent magnetic operating mechanism are connected, the vacuum extinction chamber comprises a moving end conductive rod, the permanent magnetic operating mechanism (7) comprises a fixing iron core (21), a moving iron core (23), an upper drive coil (22), a middle drive coil (24), a permanent magnet (25), a lower drive coil (26) and a drive rod (20) which is connected to the moving iron core (23), the fixing iron core (21) is provided with an inner cavity, the inner cavity comprises an upper end face, a lower end face and a cylindrical moving iron core moving space arranged between the upper end face and the lower end face, two ends of the drive rod (20) extend out of the fixing iron core, and the moving iron core (23) can be arranged in the moving iron core moving space in a moving mode and is provided with a first working position, a second working position and a third working position.
Description
Technical field
The present invention relates to electric power system controller switching equipment technical field, be specifically related to a kind of three-position switch.
Background technology
On-load switch in the ring main unit, General Requirements three stations, i.e. three service positions: the closing position that 1 isolated switch main fracture is connected, the isolated location that 2 main fractures separate, the earthing position of 3 ground connection sides.Air-generating, air pressing type and SF6 formula on-load switch are easily realized three stations.For vacuum circuit-breaker or vacuum load switch, because vacuum interrupter can only cut-off, can not isolate, so general vacuum ring main unit is added a three-station before circuit breaker or on-load switch, to form isolation fracture.Three-station, English is called for short 3PS, i.e. 3 position switchgear.Three-station is usually used in fully closed combined electric unit (GIS) or the compound electric apparatus (PASS), is not an independent product, is usually used in the XGN ring main unit.
So-called three stations refer to three service positions: the closing position that 1 isolated switch main fracture is connected, the isolated location that 2 main fractures separate, the earthing position of 3 ground connection sides.Three-station is exactly the function of having integrated isolating switch and earthed switch in fact, and finished by a cutter, so just can realize mechanical latching, prevent the charged ground cutter that closes of major loop, because one can only be a position cutter, and unlike traditional isolating switch, operator is operator, the ground cutter is the ground cutter, just may go out misoperation between two cuttves.Be a cutter and tri-station isolating switch is used, one at a time is the service position of cutter unique, is not at the main switch closing position, is exactly in the isolated location or earthing position.Among traditional GIS, isolating switch and earthed switch are two functional units, use electrical interlock to control, and recent design is used tri-station isolating switch exactly now, avoided the possibility of misoperation, and not only simplified the structure but also reduced cost with respect to two traditional station vacuum arc extinguish chambers.
Existing three-station generally adopts spring mechanism to come the actuating vacuum interrupter.There is following shortcoming in spring mechanism: rely on machine driving fully, and complex structure, amount of parts is many, and there are up to a hundred parts in general spring mechanism; Transmission mechanism comparatively complexity and failure rate is higher, and moving component is many, and manufacture process requirement is high; In long-time running work, wearing and tearing appears in these parts easily, the loss of corrosion and lubricating oil, solidifies all can cause improper operation.Area northeastward, lubricating oil solidifies and causes mechanism damaged in the time of winter, and in areas such as northwests, long-term dust storm corrosion causes mechanism damaged.
Summary of the invention
The purpose of this invention is to provide a kind of three-station, to solve existing three-station in the switching of three service positions and to keep needing auxiliary could the realization of the parts such as spring and the complex structure that brings, control coarse problem, the auxiliary problem controlled of could realizing that will solve especially that the service position needs the parts such as spring in the centre position that is positioned at static iron core.
For this reason, the present invention proposes a kind of three-station, and described three-station comprises: the vacuum interrupter that is connected and three-stable state permanent-magnet manipulating mechanism,
Described vacuum interrupter comprises: the moved end conducting rod;
Described permanent-magnet operating mechanism 7 comprises: static iron core 21, moving iron core 23, upper drive coil 22, middle drive coil 24, permanent magnet 25, lower drive coil 26 and the drive rod 20 that is connected on the described moving iron core 23, described static iron core 21 has inner chamber, described inner chamber comprises: the upper surface, the moving iron core mobile space of lower surface and the cylindricality between described upper surface and described lower surface, described drive rod 20 stretches out from the inner chamber of described static iron core, and described moving iron core 23 is mobile to be arranged in the described moving iron core mobile space and to have the first service position, the second service position and the 3rd service position;
Described static iron core 21 also comprises: spaced apart and be enclosed in respectively the outer a plurality of annular dead slot of described inner chamber from top to bottom, described upper drive coil 22, middle drive coil 24 and described lower drive coil 26 are set in respectively outside the described moving iron core by described annular dead slot;
Described a plurality of annular dead slot is: spaced apart and be enclosed in respectively described moving iron core mobile space outer the first annular dead slot, the second annular dead slot and the 3rd annular dead slot from top to bottom, described upper drive coil 22 is arranged in the described first annular dead slot, described middle drive coil 24 is arranged in the described second annular dead slot, and described lower drive coil 26 is arranged in the described the 3rd annular dead slot; Described static iron core 21 also comprises: it is outer and separate the first annular boss 104 of the described first annular dead slot and the second annular dead slot to be enclosed in described inner chamber; And: it is outer and separate the second annular boss 106 of the described second annular dead slot and described the 3rd annular dead slot to be enclosed in described moving iron core mobile space, is provided with the space that holds described permanent magnet 25 between described the second annular boss 106 and the described moving iron core mobile space;
Described moving iron core 23 comprises: from top to bottom a plurality of grooves spaced apart, and the Fourth Ring shape boss 204 that is arranged in described moving iron core 23 and two described grooves of separating adjacent; Described moving iron core 23 also comprises: the 3rd annular boss 202 and the five rings shape boss 206 that lay respectively at shape boss 204 above and belows, described Fourth Ring, the upper surface of described moving iron core 23 is positioned on described the 3rd annular boss 202, the lower surface of described moving iron core 23 is positioned on the described five rings shape boss 206, and described moving iron core 23 also comprises: the first groove 201 and the second groove 203 between described Fourth Ring shape boss 204 and described five rings shape boss 206 between described the 3rd annular boss 202 and described Fourth Ring shape boss 204;
Described moved end conducting rod is connected with described drive rod.
Further, in described the second service position, described the first annular boss and described Fourth Ring shape boss are combined to form the first magnetic circuit diametrically mutually, described five rings shape boss and described the second annular boss are combined to form the second magnetic circuit diametrically mutually, described the first magnetic circuit and described the second communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described five rings shape boss is away from the lower surface of described inner chamber;
In described the 3rd service position, fit and form the 3rd magnetic circuit in the lower surface of described five rings shape boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 4th magnetic circuit diametrically mutually, described the 3rd magnetic circuit and described the 4th communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described Fourth Ring shape boss and described the first annular boss stagger mutually;
In described the first service position, fit and form the 5th magnetic circuit in the upper surface of described the 3rd annular boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 6th magnetic circuit diametrically mutually, described the 5th magnetic circuit and described the 6th communicated magnetic circuit, described the 3rd annular boss and described the first annular boss stagger mutually, and described five rings shape boss is away from the lower surface of described inner chamber.
Further, described vacuum interrupter comprises: the shell with internal cavities, be provided with static contact system, grounding system and the movable contact system between described static contact system and grounding system in the internal cavities of described shell, described moved end conducting rod is connected on the described movable contact system.
Further, described shell comprises: insulation crust and quiet cover plate, described insulation crust are divided into two sections, and two sections described insulation crusts lay respectively at the both sides of described quiet cover plate and couple together by described quiet cover plate.
Further, described static contact system comprises: be arranged on the quiet end conducting rod, the first copper sheet and the fixed contact that connect successively in the internal cavities of described insulation crust.
Further, described movable contact system comprises: the moving insulating contact, the second copper sheet and the moving grounding contact that connect successively.
Further, described grounding system comprises: static ground contact and inner chamber ground loop, described inner chamber ground loop is connected on the described quiet cover plate, is provided with through hole in the described inner chamber ground loop, described through hole hold described moved end conducting rod by but block described moving grounding contact and pass through.
Further, described three-station also comprises: shaft coupling, described moved end conducting rod is connected by shaft coupling with described drive rod.
Further, the protective cover for corrugated pipe that also is provided with bellows and is arranged on described corrugated tube end on the conducting rod of described moved end.
The present invention by a plurality of annular dead slots, annular boss and coil are set in static iron core and in moving iron core correspondence a plurality of annular boss are set, can consist of stable magnetic circuit in three different operating positions and permanent magnet, static iron core, thereby will move iron core is stabilized on these three positions, realize switching and the maintenance of three service positions of vacuum interrupter, avoid adopting the complicated mechanical structures such as spring structure.The present invention need not to thread off, locker, also need not to increase the electrical interlocks device, operating mechanism action dispersiveness is little, controllability good, can select best closing moment according to electrical network and load operation operating mode, close a floodgate when realizing voltage zero-cross, separating brake during current over-zero, thereby reduce handoff procedure to the impact of relevant device and electrical network, satisfy intelligent grid to the intelligentized requirement of electric equipment.
Description of drawings
Fig. 1 is the inner body structural representation according to the three-station of the embodiment of the invention;
Fig. 2 is in the structure of open position and the three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram of this position for the three-station according to the embodiment of the invention;
Fig. 3 is structure and this moment three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram that the three-station according to the embodiment of the invention moves from open position to earthing position;
Fig. 4 is for being in structure and this position three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram of earthing position according to the three-station of the embodiment of the invention;
Fig. 5 is structure and this moment three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram that the three-station according to the embodiment of the invention moves from earthing position to open position.
Fig. 6 is structure and this moment three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram that the three-station according to the embodiment of the invention moves from open position to closing position.
Fig. 7 is for being in structure and this position three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram of closing position according to the three-station of the embodiment of the invention.
Fig. 8 is structure and this moment three-stable state permanent-magnet manipulating mechanism Distribution of Magnetic Field schematic diagram that the three-station according to the embodiment of the invention moves from closing position to open position;
Fig. 9 is the internal structure schematic diagram according to the permanent-magnet operating mechanism of the embodiment of the invention.
Annotate: among above-mentioned each figure, because inner lines and label are more, for clear and directly perceived the demonstration, the in-profile lines still embody with straight line, and the magnetic line of force dots.
The drawing reference numeral explanation:
1-magnetic line of force 3-shell 4-static contact system 5-movable contact system 6-grounding system 7-permanent-magnet operating mechanism 8-vacuum interrupter 14-shaft coupling
The 20-drive rod; The 21-static iron core; The upper drive coil of 22-; 23-moves iron core; Drive coil among the 24-; The 25-permanent magnet; Drive coil under the 26-; 101, the lower surface of the upper surface 2061 of inner chamber 1011, inner chamber upper surface 1013, inner chamber lower surface 104, the first annular boss 105, the second annular dead slot 106, the second annular boss 201, the first groove 202, the 3rd annular boss 203, the second groove 204, Fourth Ring shape boss 206, five rings shape boss 2021, moving iron core, moving iron core
The quiet end conducting rod of the quiet cover plate 41-of 31-insulation crust 32-43-the first copper sheet; The 44-fixed contact; 51-moved end conducting rod; The 52-protective cover for corrugated pipe; The 53-bellows; 55--moves insulating contact; 56-the second copper sheet; 57-moves grounding contact; 68-(upper surface welding) static ground contact; 69-inner chamber ground loop
Embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast description of drawings the specific embodiment of the present invention.
As shown in Figure 1, the three-station according to the embodiment of the invention comprises: the vacuum interrupter 8 and the three-stable state permanent-magnet manipulating mechanism 7 that are connected, described vacuum interrupter 8 comprises: moved end conducting rod 51.The main distinction of the three-station of the present invention and existing bistable state permanent magnet operating mechanism is: the permanent-magnet operating mechanism 7 that the present invention adopts is the permanent-magnet operating mechanisms with three stable states, Duoed a stable state than existing bistable state permanent magnet operating mechanism, be that the permanent-magnet operating mechanism 7 that the present invention adopts has three stable service positions, thereby so that vacuum interrupter also have three service positions.Except adopting the present invention to have the arranging of three service positions, also can adopt existing various vacuum interrupter as for the vacuum interrupter that is connected to permanent-magnet operating mechanism 7 ends.
As shown in Figure 9, described permanent-magnet operating mechanism 7 comprises: static iron core 21, moving iron core 23, upper drive coil 22, middle drive coil 24, permanent magnet 25, lower drive coil 26 and the drive rod 20 that is connected on the described moving iron core 23, described static iron core 21 has inner chamber, described inner chamber comprises: the upper surface, the moving iron core mobile space of lower surface and the cylindricality between described upper surface and described lower surface, described drive rod 20 stretches out from the inner chamber of described static iron core, and described moving iron core 23 is mobile to be arranged in the described moving iron core mobile space and to have the first service position, the second service position and the 3rd service position;
In the present embodiment, the second service position is b (or B position), such as Fig. 2,3,6 and Fig. 9, namely moving iron core 23 is in the centre position in the static iron core 21, this position is neither moving iron core 23 is in the position (being position a or A) of static iron core 21 upper ends, neither move the position (being position c) that iron core 23 is in static iron core 11 lower ends, this is one of difference with the prior art of the present invention.Prior art can only realize that moving iron core 23 is in the position of static iron core 21 upper ends or lower end by Electromagnetic Control, the stable state that can not be implemented in the b position keeps, if and adopt the control of the mechanical parts such as spring, make iron core 23 be in the b position, then can increase the complexity of structure, and because the wearing and tearing of the mechanical parts such as spring cause the problems such as control error easily.
Described static iron core 21 also comprises: spaced apart and be enclosed in respectively the outer a plurality of annular dead slot of described inner chamber from top to bottom, annular dead slot plays the effect of holding coil, when coil blackout, also plays the effect of the interval magnetic line of force.Described upper drive coil 22, middle drive coil 24 and described lower drive coil 26 are set in respectively outside the described moving iron core by described annular dead slot.
Described a plurality of annular dead slot is: spaced apart and be enclosed in respectively described moving iron core mobile space outer the first annular dead slot, the second annular dead slot and the 3rd annular dead slot from top to bottom, described upper drive coil 22 is arranged in the described first annular dead slot, described middle drive coil 24 is arranged in the described second annular dead slot, and described lower drive coil 26 is arranged in the described the 3rd annular dead slot; Described static iron core 21 also comprises: it is outer and separate the first annular boss 104 of the described first annular dead slot and the second annular dead slot to be enclosed in described inner chamber; And: it is outer and separate the second annular boss 106 of the described second annular dead slot and described the 3rd annular dead slot to be enclosed in described moving iron core mobile space, is provided with the space that holds described permanent magnet 25 between described the second annular boss 106 and the described moving iron core mobile space;
Described moving iron core 23 comprises: from top to bottom a plurality of grooves spaced apart, and the Fourth Ring shape boss 204 that is arranged in described moving iron core 23 and two described grooves of separating adjacent; Described moving iron core 23 also comprises: the 3rd annular boss 202 and the five rings shape boss 206 that lay respectively at shape boss 204 above and belows, described Fourth Ring, the upper surface of described moving iron core 23 is positioned on described the 3rd annular boss 202, the lower surface of described moving iron core 23 is positioned on the described five rings shape boss 206, and described moving iron core 23 also comprises: the first groove 201 and the second groove 203 between described Fourth Ring shape boss 204 and described five rings shape boss 206 between described the 3rd annular boss 202 and described Fourth Ring shape boss 204;
Such as Fig. 2, in described the second service position, described the first annular boss 104 and described Fourth Ring shape boss 204 are mutually involutory diametrically, and (herein involutory can be to fit, overlap, adhesive or cooperation) formation the first magnetic circuit, described five rings shape boss and described the second annular boss are combined to form the second magnetic circuit diametrically mutually, described the first magnetic circuit and described the second communicated magnetic circuit, form closed magnetic path, so, moving iron core 23 is in stable position, namely moving iron core is subject to external disturbance and when departing from a little this position, moving iron core 23 suffered magnetic force can drive it and get back to this stable position.In b (or B) position, described the 3rd annular boss is away from the upper surface of described inner chamber, described five rings shape boss away from the lower surface of described inner chamber (herein, except Fig. 9, among other each figure, the upper surface is arranged in the left side of figure, and the lower surface is arranged in the right side of figure, and the relative position of upper surface and lower surface is left and right directions); Be the upper surface 2021 of described moving iron core 23 away from the upper surface 1011 of described inner chamber, the lower surface 2061 of described moving iron core 23 is away from the lower surface 1013 of described inner chamber.Between permanent magnet 25 and the five rings shape boss 206 the stronger magnetic line of force is arranged, the magnetic line of force between this magnetic line of force and the first annular boss 104 and the Fourth Ring shape boss 204 forms closed magnetic path, simultaneously, do not form magnetic circuit between the 3rd annular boss 202 of moving iron core 23 and the static iron core 1, thereby moving iron core 23 can remain on the b position.
In described the 3rd service position, such as Fig. 9, (lower end that is drive rod is positioned at position c) described the 5th convex annular 206 is fitted with the lower surface 2061 of described inner chamber and is formed the 3rd magnetic circuit, described five rings shape boss 206 is combined to form the 4th magnetic circuit diametrically mutually with described the second annular boss 106, described the 3rd magnetic circuit and described the 4th communicated magnetic circuit, described the 3rd annular boss 202 is away from the upper surface 1011 of described inner chamber, and described Fourth Ring shape boss 204 staggers mutually with described the first annular boss 104.
In described the first service position, (upper end that is drive rod is arranged in Fig. 9 position A), such as Figure 4 and 5, described the 3rd annular boss 202 is fitted with the upper surface 1011 of described inner chamber and is formed the 5th magnetic circuit, described five rings shape boss 206 is combined to form the 6th magnetic circuit diametrically mutually with described the second annular boss 106, described the 5th magnetic circuit and described the 6th communicated magnetic circuit, described the 3rd annular boss 202 staggers diametrically mutually with described the first annular boss 104, and described five rings shape boss 206 is away from the lower surface of described inner chamber.Among Fig. 5, between permanent magnet 25 and the five rings shape boss 206 the stronger magnetic line of force is arranged, the magnetic line of force between the upper end of this magnetic line of force and static iron core 21 and the 3rd annular boss 202 forms closed magnetic path, simultaneously, the first annular boss 104 does not form closed magnetic path with described Fourth Ring shape boss 204, thereby moving iron core 23 can remain on a position.
Described moved end conducting rod 51 is connected with described drive rod 20.Because moving iron core 23 has three service positions, thereby the moved end conducting rod 51 that is connected with described drive rod 20 can have three service positions, thereby, vacuum interrupter also has three service positions, can realize separating brake, combined floodgate and three kinds of service positions of ground connection and mutually switching.
Further, such as Fig. 1, described vacuum interrupter 8 comprises: the shell 3 with annular of internal cavities, be provided with static contact system 4, the movable contact system 5 of grounding system and 6 between described static contact system and grounding system in the internal cavities of described shell, described moved end conducting rod connects 51 and is connected on the described movable contact system 5.Connect 51 movement by the moved end conducting rod, can realize separating brake, combined floodgate and three kinds of service positions of ground connection and mutually switching, thereby realize the adjustment of three service positions of vacuum interrupter.
Further, such as Fig. 1, described shell bag 3 comprises: insulation crust 31 and quiet cover plate 32, and described insulation crust 31 is divided into two sections, and two sections described insulation crusts lay respectively at the both sides of described quiet cover plate 32 and couple together by described quiet cover plate 32.Like this, the function that is grounded in can vacuum interrupter takes full advantage of axial space and the radial space of the shell 3 of annular, has realized the setting of three service positions.
Further, such as Fig. 1, described static contact system 4, comprise: be arranged on the quiet end conducting rod 41, the first copper sheet 43 and the fixed contact 44 that connect successively in the internal cavities of described insulation crust, the first copper sheet 43 and fixed contact 44 are disk-like structure, along the circumferentially extending of internal cavities, in order to be connected with movable contact system 6.Quiet end conducting rod 41 can be electrically connected with the outside along the axial stretching, extension of internal cavities.Described fixed contact 44 can be made by chromiumcopper or oxygen-free copper, is used for connecting moving insulating contact 55.
Further, such as Fig. 1, described movable contact system 5 comprises: be in turn connected to form along moving insulating contact 55, the second copper sheet 56 and the moving grounding contact 57 of the disk-like structure of the circumferentially extending of internal cavities so that moving insulating contact 55 be connected grounding contact 57 and be connected with grounding system with static contact system 4 respectively and be connected.Moving insulating contact 55 materials can be made by copper-tungsten or oxygen-free copper.
Further, such as Fig. 1, described grounding system 6 comprises: along static ground contact 68 and the inner chamber ground loop 69 of the circumferentially extending of internal cavities, described inner chamber ground loop 69 be connected on the described quiet cover plate 32 and the diameter of inner chamber ground loop 69 greater than the diameter of quiet cover plate 32, be used for ground connection.Be provided with through hole in the described inner chamber ground loop, described through hole hold described moved end conducting rod 51 by but block described moving grounding contact 57 and pass through so that spacing to moving grounding contact 57, keep the stable of earthing position.Static ground contact 68 can be made by chromiumcopper or oxygen-free copper.
Further, such as Fig. 1, described three-station also comprises: shaft coupling 14, described moved end conducting rod 51 and described drive rod 20 are connected stable connection, convenience by shaft coupling.
Further, such as Fig. 1, the protective cover for corrugated pipe 52 that also is provided with bellows 53 on the described moved end conducting rod 51 and is arranged on described bellows 53 ends is to realize arc extinguishing.Collision is avoided in the end of protective cover for corrugated pipe 52 protection bellowss 53.
When drive rod 20 drive switches are stabilized in open position, as shown in Figure 2, at this moment, three-stable state permanent magnetic operating structure 7 is stabilized in the b position, and the magnetic flux that this moment, permanent magnet produced is mainly by passing through in the magnetic circuit that comprises boss that boss that static iron core 21 is provided with and moving iron core 20 are provided with or groove.Drive rod 20 is moved to left end by position shown in Figure 2 with moving iron core 23, iron core is pulled together with the part of static iron core 16 near the left end inwall near the end face (lower surface 1011 among Fig. 9) of left end, form the magnetic circuit that seals with permanent magnet 25, just can make this moment drive rod 20 drive vacuum interrupters 8 and be stabilized in closing position.In like manner, drive rod 20 is moved to right-hand member by position shown in Figure 2 with moving iron core 23, the end face (lower surface 1013 among Fig. 9) of iron core right-hand member is pulled together near the right-hand member inner wall section with static iron core 16, form the magnetic circuit that seals with permanent magnet 25, just can make this moment drive rod 20 drive vacuum interrupters 8 and be stabilized in earthing position.
Specific works principle and the Distribution of Magnetic Field of three-station of the present invention are described below.The magnetizing direction of following permanent magnet 25 is for straight down among Fig. 2, and the magnetizing direction of top permanent magnet is for straight up.Half of outflow of bus current paper under definition Fig. 2 coil, the sense of current when the upper electric current of coil flows into paper is positive direction.When moving iron core 23 when switch shown in Fig. 2 is in open position and the equal no power of all coils, the three-stable state permanent magnet mechanism Distribution of Magnetic Field (magnetic line of force 1) in a kind of novel three-station of the present invention is as shown in Figure 2.
Obviously, this moment, moving iron core 23 was in stable position, and namely moving iron core is subject to external disturbance and when departing from a little this position, the moving suffered magnetic force of iron core can drive it and get back to this stable position.In this stable position, pass into forward current for lower drive coil 26, other coil no powers, moving iron core 23 just is subject to magnetic force to the right, the moved end conducting rod 51 that drive drive rod 20 begins to drive in the vacuum interrupter moves to earthing position, and the Distribution of Magnetic Field schematic diagram of mechanism as shown in Figure 3 at this moment.
Subsequently, the moved end conducting rod 51 that moving iron core 23 drives in three station vacuum arc extinguish chambers moves to earthing position, cut off the electric current of all coils, moving iron core 23 just is pull-in on the right-hand member of static iron core 21 under the effect of the magnetic field force that permanent magnet provides, thereby so that the moving grounding contact 57 of three station vacuum arc extinguish chambers contacts with static ground contact 68, thereby be stabilized in earthing position, the Distribution of Magnetic Field schematic diagram of this mechanism as shown in Figure 4 at this moment, obviously this position is a stable position, and the suction-combining force of permanent magnet will provide the stronger required confining force of switch combined floodgate.
Then, in lower drive coil 26 and middle drive coil 24, pass into respectively electric current in the other direction, the magnetic field of mechanism respectively will be as shown in Figure 5, the moved end conducting rod 51 that moving iron core 23 will begin to drive under the magnetic field force effect in the vacuum interrupter this moment moves to open position, thereby gets back to position of the switch open position.
When moving iron core 23 and drive rod 20 so that switch when being stabilized in the position separating brake, drive coil 22 passes into reverse current left, other coil no powers, the moved end conducting rod 51 that moving iron core 23 will begin to drive under the magnetic field force effect in the vacuum interrupter moves to closing position, and this moment, the Distribution of Magnetic Field schematic diagram of this mechanism will be as shown in Figure 6.
Subsequently, moving iron core 23 drives drive rod 20 motions so that moving insulating contact 55 contacts with fixed contact 44, switch is to closing position, cut off the electric current of all coils, moving iron core 23 just is pull-in on the left end of static iron core 21 under the effect of the magnetic field force that permanent magnet provides, thereby switch is stabilized on the combined floodgate of position, and the Distribution of Magnetic Field schematic diagram of this mechanism as shown in Figure 7 at this moment, obviously this position is a stable position, and the suction-combining force of permanent magnet is with the required confining force of switch combined floodgate that provides.
Then, in left drive coil 22 and middle drive coil 24, pass into respectively forward current, the magnetic field of mechanism respectively will be as shown in Figure 8, the moved end conducting rod 51 that moving iron core 23 will begin to drive under the magnetic field force effect in three station vacuum arc extinguish chambers this moment moves to open position, thereby switch is got back to open position.So far, this mechanism has finished a complete duty cycle.
Wherein, can make in the second annular dead slot 105 middle drive coil 24 is not set.Better, the present invention arranges middle drive coil 24, the switching of carrying out the service position that can be sensitiveer.
Three-station of the present invention has the following advantages: avoid adopting the complicated mechanical structures such as spring structure, the closure by magnetic circuit just can be stabilized in drive rod on three positions the switching of three stations of realization vacuum interrupter.This operating mechanism is simple in structure, and volume is little, and reliability is high; This operating mechanism action dispersiveness is little, controllability good, can select best closing moment according to electrical network and load operation operating mode, close a floodgate when realizing voltage zero-cross, separating brake during current over-zero, thereby reduce handoff procedure to the impact of relevant device and electrical network, satisfy intelligent grid to the intelligentized requirement of electric equipment.
The above only is the schematic embodiment of the present invention, is not to limit scope of the present invention.For each part of the present invention can make up under the condition of not conflicting mutually, any those skilled in the art, the equivalent variations of having done under the prerequisite that does not break away from design of the present invention and principle and modification all should belong to the scope of protection of the invention.
Claims (9)
1. a three-station is characterized in that, described three-station comprises: the vacuum interrupter that is connected and three-stable state permanent-magnet manipulating mechanism,
Described vacuum interrupter comprises: the moved end conducting rod;
Described permanent-magnet operating mechanism (7) comprising: static iron core (21), moving iron core (23), upper drive coil (22), middle drive coil (24), permanent magnet (25), lower drive coil (26) and be connected to drive rod (20) on the described moving iron core (23), described static iron core (21) has inner chamber, described inner chamber comprises: the upper surface, the moving iron core mobile space of lower surface and the cylindricality between described upper surface and described lower surface, described drive rod (20) stretches out from the inner chamber of described static iron core, and described moving iron core (23) is mobile to be arranged in the described moving iron core mobile space and to have the first service position, the second service position and the 3rd service position;
Described static iron core (21) also comprises: spaced apart and be enclosed in respectively the outer a plurality of annular dead slot of described inner chamber from top to bottom, described upper drive coil (22), middle drive coil (24) and described lower drive coil (26) are set in respectively outside the described moving iron core by described annular dead slot;
Described a plurality of annular dead slot is: spaced apart and be enclosed in respectively described moving iron core mobile space outer the first annular dead slot, the second annular dead slot and the 3rd annular dead slot from top to bottom, described upper drive coil (22) is arranged in the described first annular dead slot, described middle drive coil (24) is arranged in the described second annular dead slot, and described lower drive coil (26) is arranged in the described the 3rd annular dead slot; Described static iron core (21) also comprises: it is outer and separate first annular boss (104) of the described first annular dead slot and the second annular dead slot to be enclosed in described inner chamber; And: it is outer and separate second annular boss (106) of the described second annular dead slot and described the 3rd annular dead slot to be enclosed in described moving iron core mobile space, is provided with the space that holds described permanent magnet (25) between described the second annular boss (106) and the described moving iron core mobile space;
Described moving iron core (23) comprising: from top to bottom a plurality of grooves spaced apart, and the Fourth Ring shape boss (204) that is arranged in described moving iron core (23) and two described grooves of separating adjacent; Described moving iron core (23) also comprises: the 3rd annular boss (202) and the five rings shape boss (206) that lay respectively at described Fourth Ring shape boss (204) above and below, the upper surface of described moving iron core (23) is positioned on described the 3rd annular boss (202), the lower surface of described moving iron core (23) is positioned on the described five rings shape boss (206), and described moving iron core (23) also comprises: be positioned at the first groove (201) between described the 3rd annular boss (202) and the described Fourth Ring shape boss (204) and be positioned at the second groove (203) between described Fourth Ring shape boss (204) and the described five rings shape boss (206);
Described moved end conducting rod is connected with described drive rod.
2. three-station as claimed in claim 1 is characterized in that,
In described the second service position, described the first annular boss and described Fourth Ring shape boss are combined to form the first magnetic circuit diametrically mutually, described five rings shape boss and described the second annular boss are combined to form the second magnetic circuit diametrically mutually, described the first magnetic circuit and described the second communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described five rings shape boss is away from the lower surface of described inner chamber;
In described the 3rd service position, fit and form the 3rd magnetic circuit in the lower surface of described five rings shape boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 4th magnetic circuit diametrically mutually, described the 3rd magnetic circuit and described the 4th communicated magnetic circuit, described the 3rd annular boss is away from the upper surface of described inner chamber, and described Fourth Ring shape boss and described the first annular boss stagger mutually;
In described the first service position, fit and form the 5th magnetic circuit in the upper surface of described the 3rd annular boss and described inner chamber, described five rings shape boss and described the second annular boss are combined to form the 6th magnetic circuit diametrically mutually, described the 5th magnetic circuit and described the 6th communicated magnetic circuit, described the 3rd annular boss and described the first annular boss stagger mutually, and described five rings shape boss is away from the lower surface of described inner chamber.
3. three-station as claimed in claim 1 or 2, it is characterized in that, described vacuum interrupter comprises: the shell with internal cavities, be provided with static contact system, grounding system and the movable contact system between described static contact system and grounding system in the internal cavities of described shell, described moved end conducting rod is connected on the described movable contact system.
4. three-station as claimed in claim 3 is characterized in that, described shell comprises: insulation crust and quiet cover plate, described insulation crust are divided into two sections, and two sections described insulation crusts lay respectively at the both sides of described quiet cover plate and couple together by described quiet cover plate.
5. three-station as claimed in claim 3 is characterized in that, described static contact system comprises: be arranged on the quiet end conducting rod, the first copper sheet and the fixed contact that connect successively in the internal cavities of described insulation crust.
6. three-station as claimed in claim 3 is characterized in that, described movable contact system comprises: the moving insulating contact, the second copper sheet and the moving grounding contact that connect successively.
7. three-station as claimed in claim 4, it is characterized in that, described grounding system comprises: static ground contact and inner chamber ground loop, described inner chamber ground loop is connected on the described quiet cover plate, be provided with through hole in the described inner chamber ground loop, described through hole hold described moved end conducting rod by but block described moving grounding contact and pass through.
8. three-station as claimed in claim 1 or 2 is characterized in that, described three-station also comprises: shaft coupling, described moved end conducting rod is connected by shaft coupling with described drive rod.
9. three-station as claimed in claim 1 or 2 is characterized in that, the protective cover for corrugated pipe that also is provided with bellows and is arranged on described corrugated tube end on the conducting rod of described moved end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104917237A CN102983017A (en) | 2012-11-27 | 2012-11-27 | Three-position switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104917237A CN102983017A (en) | 2012-11-27 | 2012-11-27 | Three-position switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102983017A true CN102983017A (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104917237A Pending CN102983017A (en) | 2012-11-27 | 2012-11-27 | Three-position switch |
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| Country | Link |
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| CN (1) | CN102983017A (en) |
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| CN103578802A (en) * | 2013-11-14 | 2014-02-12 | 国家电网公司 | Permanent magnetic spring rectilinear motion device |
| CN107068479A (en) * | 2016-12-01 | 2017-08-18 | 珠海许继电气有限公司 | A kind of increasing productivity switchs the electrical structure of rated short circuit current making capability |
| CN108155076A (en) * | 2018-01-07 | 2018-06-12 | 浙江宝威电气有限公司 | A kind of permanent magnet mechanism |
| CN108389749A (en) * | 2017-09-11 | 2018-08-10 | 平高集团有限公司 | A kind of three-station isolating grounding switch |
| CN108400049A (en) * | 2017-09-11 | 2018-08-14 | 平高集团有限公司 | A kind of three-station isolating grounding switch magnetic force operating mechanism |
| CN108538656A (en) * | 2018-04-28 | 2018-09-14 | 浙江宝威电气有限公司 | A kind of three station permanent magnet mechanisms |
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| CN108400049B (en) * | 2017-09-11 | 2019-11-08 | 平高集团有限公司 | A kind of three-station isolating grounding switch magnetic force operating mechanism |
| CN108389749B (en) * | 2017-09-11 | 2019-11-08 | 平高集团有限公司 | A kind of three-station isolating grounding switch |
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| CN108538656A (en) * | 2018-04-28 | 2018-09-14 | 浙江宝威电气有限公司 | A kind of three station permanent magnet mechanisms |
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Application publication date: 20130320 |