CN101615536B - Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker - Google Patents
Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker Download PDFInfo
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- CN101615536B CN101615536B CN200910100918.2A CN200910100918A CN101615536B CN 101615536 B CN101615536 B CN 101615536B CN 200910100918 A CN200910100918 A CN 200910100918A CN 101615536 B CN101615536 B CN 101615536B
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Abstract
The invention discloses a gas blast arc-quenching type AC permanent magnet intelligent circuit breaker, comprising a base, an incoming busbar, a dynamic contact electrically connected with the incoming busbar, a dynamic contact supporting part, a static contact, an outgoing busbar electrically connected with the static contact, a static contact supporting part, an operating mechanism used for driving the dynamic contact to open and close and an arc quenching mechanism used for quenching arc; wherein, the arc quenching mechanism comprises an arcing shield and an arcing ring, and also comprises a normally closed solenoid valve used for closing or conducting a pipeline communicated with an external air source and an air blowing nozzle used for quickly breaking the arc by blowing; an air intake of the air blowing nozzle is communicated with the normally closed solenoid valve via the pipeline. During opening, the circuit breaker adopts high-pressure air to quickly break the arc by blowing, effectively reduces the length of the arc and quickly blows the arc into the arcing shield to quench the arc, thus greatly improving the arc quenching speed.
Description
Technical field
The invention belongs to DC switch technical field, be specifically related to a kind of intelligent DC circuit breaker.
Background technology
DC circuit breaker, China is mainly used on industrial-mineral electric locomotive, and direct current machine is used as to short circuit or overload protection.Existing direct current quick breaker, the general this version of DC solenidal operation electriomagnet transmission that adopts is compared with the operating mechanism that adopts direct current machine, air operated machine to make, structure is comparatively simple, but its operating current is large, opening time is long, for this reason, must strengthen diameter of wire, strengthen electromagnet size, thereby make whole circuit breaker volume become large.Because electromagnet size strengthens caused self overheated and impulsive force, be difficult to meet the frequent operation requirement of electric locomotive.
Patent documentation CN2105761U discloses a kind of electric locomotive DC quick circuit breaker, formed by arc quenching system, frame, operating mechanism, contact and overcurrent release system, it is characterized in that with a single-acting cylinder or double-acting cylinder transmission operating mechanism, and by the closure of linkage operating breaker contact.Can clearly observe from its Figure of description 1, the structure of its linkage is very complicated, and parts are more, easily break down, and is difficult to move reliably and with long-term; In addition, well-known, direct current is due to inferred-zero, its arc extinguishing is compared with alternating current arc extinguishing, comparatively difficult, and the arc quenching system of this kind of DC circuit breaker is comparatively simple, only rely on arc extinguishing board that electric arc is guided in arc-extinguish chamber, arc quenching effect is poor, so its arc quenching effect is also needed improvement badly.
Summary of the invention
The object of this invention is to provide a kind of designs simplification, can blow fast power-off arc, effectively reduce arc length, effectively improve the gas blast arc-quenching type AC permanent magnet intelligent circuit breaker of arc extinguishing speed.
The technical scheme that realizes the object of the invention is: a kind of gas blast arc-quenching type AC permanent magnet intelligent circuit breaker, comprises pedestal, incoming-line busbar, the moving contact being electrically connected with described incoming-line busbar, moving contact supporter, fixed contact, the outgoing line busbar being electrically connected with described fixed contact, fixed contact supporter, for driving moving contact to do the operating mechanism of divide-shut brake action and the arc-extinguishing mechanism for arc extinguishing; Described arc-extinguishing mechanism comprises arc-extinguish chamber and arc leading angle; Described arc-extinguishing mechanism also comprise one for close or the normally closed solenoid valve of conducting and extraneous source of the gas connecting pipeline and one for blowing fast the blowing nozzle of power-off arc; The air inlet of described blowing nozzle is communicated with normally closed solenoid valve by pipeline.
In technique scheme, the electric arc setting producing between dynamic/static contact when the gas outlet of described blowing nozzle faces separating brake.
In technique scheme, described fixed contact supporter is electrically connected with described outgoing line busbar; Described fixed contact is arranged on the upper end of fixed contact supporter, and described blowing nozzle is arranged on described fixed contact below.
In technique scheme, described operating mechanism comprises permanent-magnet electromagnetic actuating mechanism, insulating driving rod and supporting rod; Described permanent-magnet electromagnetic actuating mechanism is provided with telescopic actuating strut and solenoid; One end of described supporting rod is rotationally connected by the middle part of rotating shaft and described moving contact supporter, and the other end of described supporting rod is provided with waist hole, and by being connected through the rotating shaft in this waist hole and one end of insulating driving rod; The other end of described insulating driving rod is fixedly connected with described actuating strut.
In technique scheme, described operating mechanism is also included as described supporting rod provides the spring of reseting elasticity; Described moving contact supporter is electrically connected with described incoming-line busbar; The upper end of described moving contact supporter is provided with moving contact, and the lower end of described moving contact supporter is rotated and is arranged on pedestal.
In technique scheme, the shape of described blowing nozzle is triangle or toroidal; Actuating strut in described permanent-magnet electromagnetic actuating mechanism is horizontally disposed with, and described insulating driving rod and supporting rod can reciprocatingly move by along continuous straight runs under the drive of actuating strut; Described supporting rod, in doing horizontal linear and moving back and forth, drives described moving contact supporter reciprocating rotation certain angle, thereby realizes the breaking-closing operating of moving contact and fixed contact.
In technique scheme, described incoming-line busbar and outgoing line busbar are all horizontally disposed binding posts, and outgoing line busbar is arranged on the top of incoming-line busbar; Described moving contact is positioned at left side, and described moving contact supporter is fixed on described outgoing line busbar; Described fixed contact supporter is positioned at right side, and described permanent-magnet electromagnetic actuating mechanism and described normally closed solenoid valve are arranged on pedestal, and described permanent-magnet electromagnetic actuating mechanism is arranged on normally closed solenoid valve top; Described arc-extinguish chamber is arranged on the top of moving contact and fixed contact.
In technique scheme, also comprise an intelligent electronic controller and one be set on described inlet wire for electric current being carried out to the DC current sensor of real time sample.
In technique scheme, current value and the predetermined current value of described intelligent electronic controller to real time sample compares, and send the corresponding signal of telecommunication to normally closed solenoid valve and permanent-magnet electromagnetic actuating mechanism in the situation that of overcurrent and overload, control permanent-magnet electromagnetic actuating mechanism and make divide-shut brake action, and in separating brake, start described normally closed solenoid valve, make its conducting source of the gas, and then make gases at high pressure enter in blowing nozzle and from the gas outlet of blowing nozzle and blow to electric arc through pipeline.
In technique scheme, described arc-extinguishing mechanism also comprises a coil block that draws arc extinguishing for magnetic; Described coil block comprises to be established rectangular core jaggy and is set in the coil on iron core; Described moving contact and fixed contact are arranged in the middle of described breach; Described coil is electrically connected with described incoming-line busbar.
The present invention has positive effect: in (1) the present invention, because described arc-extinguishing mechanism also comprises that one for closing or the normally closed solenoid valve of conducting and extraneous source of the gas connecting pipeline; Described fixed contact supporter is provided with the blowing nozzle for guiding air-flow blow-off direction; The inner of described blowing nozzle is also that air inlet is communicated with normally closed solenoid valve by pipeline.In the time of separating brake, external intelligent electronic controller discharges to the solenoid in permanent-magnet electromagnetic actuating mechanism, also switch on to normally closed solenoid valve simultaneously, approximately 2 seconds of time remaining, electromagnetic valve work, the pipeline of conducting and extraneous source of the gas, gases at high pressure enter blowing nozzle through electromagnetically operated valve and respective line, and blow out from the inflatable mouth of blowing nozzle; Now dynamic/static contact separates, and electric arc produces, but under the effect of brushing of gases at high pressure, electric arc is blown fast disconnected, thereby effectively reduce arc length; Because direct current has zero point unlike alternating current, so if do not blow fast power-off arc, electric arc will draw longlyer, the fall time also increases thereupon; Electric arc is blown has no progeny, and continuing under the effect of brushing of gases at high pressure, and under the striking effect of arc leading angle, enters fast blow-out in arc-extinguish chamber; So the present invention can effectively increase arc extinguishing speed, improve arc quenching effect.
(2) in the present invention, the electric arc setting that the Ye Ji gas outlet, outer end of described blowing nozzle produces while facing separating brake.Only in this way, the gases at high pressure that blow out from blowing nozzle, could be blown into electric arc in arc-extinguish chamber fast, reach fast arc extinction effect.
(3), in the present invention, described fixed contact supporter is electrically connected with described outgoing line busbar; Described fixed contact is arranged on the upper end of fixed contact supporter, and described blowing nozzle is arranged on fixed contact supporter and is positioned at described fixed contact below.Because the position of blowing nozzle arranges properly, effectively reduce overall volume, and simplified structure.
(4), in the present invention, described operating mechanism comprises permanent-magnet electromagnetic actuating mechanism, insulating driving rod and supporting rod; Described permanent-magnet electromagnetic actuating mechanism is provided with telescopic actuating strut and solenoid; One end of described supporting rod is rotationally connected by the middle part of rotating shaft and described moving contact supporter, and the other end of described supporting rod is provided with waist hole, and by being connected through the rotating shaft in this waist hole and one end of insulating driving rod; The other end of described insulating driving rod is fixedly connected with described actuating strut.Compared with the disclosed electric locomotive DC quick circuit breaker of patent documentation CN2105761U, operating mechanism of the present invention is comparatively simplified, and parts are less, is difficult for occurring mechanical breakdown, can long time stability operation.
(5), in the present invention, described operating mechanism is also included as described supporting rod provides the spring of reseting elasticity.In the time of divide-shut brake, this kind of operating mechanism be due to the existence of waist hole and spring, must buffering effect thereby have, and protection dynamic/static contact; In addition, along with the increase of divide-shut brake number of times, dynamic/static contact has certain wearing and tearing, but because this spring is after combined floodgate, by exerting pressure to supporting rod, thereby moving contact tightly can be pressed on fixed contact, effectively prevent between dynamic/static contact because wearing and tearing cause loose contact.
(6) in the present invention, also comprise also comprise an intelligent electronic controller and one be set on described incoming-line busbar for electric current being carried out to the DC current sensor of real time sample; Current value and the predetermined current value of described intelligent electronic controller to real time sample compares, and send the corresponding signal of telecommunication to normally closed solenoid valve and permanent-magnet electromagnetic actuating mechanism in the situation that of overcurrent and overload, control permanent-magnet electromagnetic actuating mechanism and make divide-shut brake action, and in separating brake, start described normally closed solenoid valve, make its conducting source of the gas, make gases at high pressure enter in blowing nozzle and from the gas outlet of blowing nozzle and blow to electric arc through pipeline.Utilize this intelligent electronic controller and DC current sensor can effectively realize intellectualized operation.
(7), in the present invention, described arc-extinguishing mechanism also comprises a coil that draws arc extinguishing for magnetic; Described coil is arranged on the side away from fixed contact of moving contact, and described hub of a spool is just to described fixed contact setting.This coil, in the time of separating brake, produces a magnetic field, thereby electric arc is introduced in arc-extinguish chamber fast, further increases arc extinguishing speed.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the structural representation of operating mechanism in gas blast arc-quenching type AC permanent magnet intelligent circuit breaker shown in Fig. 1;
Fig. 3 is the structural representation of gas blast arc-quenching type AC permanent magnet intelligent circuit breaker coil assembly in Fig. 2.
Shown in accompanying drawing, be labeled as: pedestal 1, incoming-line busbar 2, moving contact 3, moving contact supporter 4, fixed contact 5, outgoing line busbar 6, fixed contact supporter 7, operating mechanism 8, permanent-magnet electromagnetic actuating mechanism 81, actuating strut 811, insulating driving rod 82, supporting rod 83, waist hole 831, breach 832, spring 84, connecting plate 85, arc-extinguishing mechanism 9, arc-extinguish chamber 91, arc leading angle 92, normally closed solenoid valve 93, blowing nozzle 94, air inlet 941, gas outlet 942, coil block 95, rectangular core 951, breach 9511, coil 952, pipeline 96, DC current sensor 100.
Embodiment
(embodiment 1)
Fig. 1 to Fig. 3 has shown a kind of embodiment of the present invention, and wherein Fig. 1 is a kind of structural representation of the present invention; Fig. 2 is the structural representation of operating mechanism in gas blast arc-quenching type AC permanent magnet intelligent circuit breaker shown in Fig. 1; Fig. 3 is the structural representation of gas blast arc-quenching type AC permanent magnet intelligent circuit breaker coil assembly in Fig. 2.
The present embodiment is a kind of gas blast arc-quenching type AC permanent magnet intelligent circuit breaker, see Fig. 1 to Fig. 3, comprise pedestal 1, incoming-line busbar 2, the moving contact 3 being electrically connected with described incoming-line busbar 2, moving contact supporter 4, fixed contact 5, the outgoing line busbar 6 being electrically connected with described fixed contact 5, fixed contact supporter 7, for driving moving contact 3 to do the operating mechanism 8 of divide-shut brake action and the arc-extinguishing mechanism 9 for arc extinguishing; Described arc-extinguishing mechanism 9 comprise arc-extinguish chamber 91, arc leading angle 92, one for close or the normally closed solenoid valve 93 of conducting and extraneous source of the gas connecting pipeline, one for blow fast power-off arc blowing nozzle 94, be communicated with the pipeline 96 of normally closed solenoid valve 93 and blowing nozzle 94 air inlets and one draw arc extinguishing coil block 95 for magnetic.The air inlet 941 of described blowing nozzle 94 is communicated with normally closed solenoid valve 93 by pipeline, and the gas outlet 942 of described blowing nozzle 94 is arranged on the below of fixed contact 5.The shape of described blowing nozzle 94 is triangle or toroidal; The present embodiment is selected triangle, the electric arc setting producing between dynamic/static contact when the gas outlet 942 of described blowing nozzle 94 faces separating brake.
Described normally closed solenoid valve 93 is communicated with extraneous high-pressure air source.
Described fixed contact supporter 7 is electrically connected with described outgoing line busbar 6; Described fixed contact 5 is arranged on the upper end of fixed contact supporter 7, and described blowing nozzle 94 is arranged on described fixed contact 5 belows.
See Fig. 3, described coil block 95 comprises the rectangular core 951 and the coil 952 being set on unshakable in one's determination 951 that are provided with breach 9511; Described moving contact 3 is arranged in the middle of described breach 9511 with fixed contact 5; Described coil 952 is electrically connected with described incoming-line busbar 2.
See Fig. 2, described operating mechanism 8 comprises permanent-magnet electromagnetic actuating mechanism 81, insulating driving rod 82, supporting rod 83 and provides the spring 84 of reseting elasticity for described supporting rod 83; Described permanent-magnet electromagnetic actuating mechanism 81 is provided with telescopic actuating strut 811 and solenoid; Described supporting rod 83 one end be provided with breach 832, be enclosed within on described moving contact supporter 4, and be rotationally connected by the middle part of rotating shaft and described moving contact supporter 4, the other end of described supporting rod 83 is provided with waist hole 831.
The other end of described supporting rod 83 is connected with insulating driving rod 82 by a connecting plate 85 that is provided with axis hole, specifically, a bearing pin inserts in axis hole, the waist hole 831 of supporting rod and the axis hole of insulating driving rod 82 ends of connecting plate 85 simultaneously, and three is coupled together simultaneously; The other end of described insulating driving rod 82 is fixedly connected with described actuating strut 811.
The external diameter of one end that is provided with waist hole 831 of described supporting rod 83 is less, and described spring 84 is set on this end of supporting rod 83, and its one end is against on supporting rod 83, and the other end is against on connecting plate 85; Due to the cooperation in spring 84 and waist hole 831, make moving contact in the time closing a floodgate with fixed contact, there is certain buffering effect.This point is very most important, because the action of permanent-magnet electromagnetic actuating mechanism 81 comparatively rapidly, the speed of divide-shut brake, if there is no cushioning effect, will be easy to damage dynamic/static contact.
Described moving contact supporter 4 is electrically connected with described incoming-line busbar 2; The upper end of described moving contact supporter 4 is provided with moving contact 3, and the lower end of described moving contact supporter 4 is rotated and is arranged on pedestal 1.
Actuating strut 811 in described permanent-magnet electromagnetic actuating mechanism 81 is horizontally disposed with, and described insulating driving rod 82 and supporting rod 83 can reciprocatingly move by along continuous straight runs under the drive of actuating strut 811; Described supporting rod 83, in doing horizontal linear and moving back and forth, drives described moving contact supporter 4 reciprocating rotation certain angles, thereby realizes the breaking-closing operating of moving contact 3 and fixed contact 5.
In the present embodiment, described incoming-line busbar 2 and outgoing line busbar 6 are all horizontally disposed binding posts, and outgoing line busbar 6 is arranged on the top of incoming-line busbar 2; Described fixed contact 5 is positioned at pedestal left-hand end, and described fixed contact supporter 7 is fixed on described outgoing line busbar 6; Described moving contact supporter 4 is positioned at pedestal right-hand end, and described permanent-magnet electromagnetic actuating mechanism 81 and described normally closed solenoid valve 93 are arranged on pedestal 1, and described permanent-magnet electromagnetic actuating mechanism 81 is arranged on normally closed solenoid valve 93 tops; Described arc-extinguish chamber 91 is arranged on the top of moving contact 3 and fixed contact 5.
The present embodiment also comprise an intelligent electronic controller (not drawing on figure) and one be set on described inlet wire for electric current being carried out to the DC current sensor 100 of real time sample.Described DC current sensor 100 preferably adopts Hall current sensor.Current value and the predetermined current value of described intelligent electronic controller to real time sample compares, and send the corresponding signal of telecommunication to normally closed solenoid valve 93 and permanent-magnet electromagnetic actuating mechanism 81 in the situation that of overcurrent and overload, control permanent-magnet electromagnetic actuating mechanism 81 and make divide-shut brake action, and in separating brake, start described normally closed solenoid valve 93, make its conducting source of the gas, and then make gases at high pressure enter in blowing nozzle 94 and from the gas outlet 942 of blowing nozzle 94 and blow to electric arc through pipeline.
The present embodiment is mainly used under high-voltage great-current operational environment, and its operating voltage is 1500V, and rated operational current can be adjusted to 1800A to 3000A; Intelligent electronic controller matches with high performance Hall current sensor, can be in the time of work operation, running current is close to real-time tracking and monitoring, its rated operational current maximum can also be selected and choose in 1800A to 3000A scope simultaneously, once circuital current exceeds after preset value, or after short circuit and overload, intelligent electronic controller can provide rapidly sub-gate signal the time in 0.012 millisecond.
In the time of needs separating brake, under intelligent electronic controller control, the energising of electromagnetism switching winding in permanent-magnet electromagnetic actuating mechanism, the normally closed solenoid valve conducting of also switching on simultaneously, the time is 2 seconds, thereby realizes separating brake.Now, gases at high pressure in external high-pressure air source, through normally closed solenoid valve 93, pipeline 96, enter into the air inlet 941 of blowing nozzle, finally from the gas outlet 942 of blowing nozzle, blow to electric arc (see in Fig. 1 shown in arrow); When dynamic/static contact has just separated, produce arcing therebetween, under gases at high pressure brush, arcing is blown disconnected very soon, thereby effectively reduces arcing length, is beneficial to blow-out.
Gases at high pressure continue brush under, and under the striking effect of leading arc angle, and draw at the magnetic of coil block under the synergy of arc extinguishing effect etc., blown disconnected electric arc and enter into rapidly arc-extinguish chamber and extinguish.
In addition, silver tungsten moving contact 3 in the present embodiment, fixed contact 5 adopt special material and process to be prepared from, specifically select for example silver strip of metal that fusing point is high to make the skeleton of porous body, again silver tungsten powder lower fusing point is placed on above porous body skeleton or below, be warming up to below skeleton fusing point, more than silver tungsten fusing point, due to silver tungsten powder smelting, porous body skeleton does not melt, silver tungsten after dissolving is filled in the hole of porous body skeleton, thus the dense product forming.Its advantage is that the contact (also claiming contact) of making has good conductivity and workability, both there is the high-melting-point, high rigidity, resistance to arc erosion, anti-melting welding of tungsten, the feature that material transfer is few, its maximum feature is exactly strong to the ability to bear of high current arc, is not prone to the bad phenomenon such as fusing, degree shape, be full of cracks, bubbling.
The present embodiment has the following advantages: in (1) the present embodiment, because described arc-extinguishing mechanism also comprises that one for closing or the normally closed solenoid valve of conducting and extraneous source of the gas connecting pipeline; Described fixed contact supporter is provided with the blowing nozzle for guiding air-flow blow-off direction; The inner of described blowing nozzle is also that air inlet is communicated with normally closed solenoid valve by pipeline.In the time of separating brake, external intelligent electronic controller discharges to the solenoid in permanent-magnet electromagnetic actuating mechanism, also switch on to normally closed solenoid valve simultaneously, approximately 2 seconds of time remaining, electromagnetic valve work, the pipeline of conducting and extraneous source of the gas, gases at high pressure enter blowing nozzle through electromagnetically operated valve and respective line, and blow out from the inflatable mouth of blowing nozzle; Now dynamic/static contact separates, and electric arc produces, but under the effect of brushing of gases at high pressure, electric arc is blown fast disconnected, thereby effectively reduce arc length; Because direct current has zero point unlike alternating current, so if do not blow fast power-off arc, electric arc will draw longlyer, the fall time also increases thereupon; Electric arc is blown has no progeny, and continuing under the effect of brushing of gases at high pressure, and under the striking effect of arc leading angle, enters fast blow-out in arc-extinguish chamber; So the present embodiment can effectively increase arc extinguishing speed, improve arc quenching effect.
(2) in the present embodiment, the electric arc setting that the Ye Ji gas outlet, outer end of described blowing nozzle produces while facing separating brake.Only in this way, the gases at high pressure that blow out from blowing nozzle, could be blown into electric arc in arc-extinguish chamber fast, reach fast arc extinction effect.
(3), in the present embodiment, described fixed contact supporter is electrically connected with described outgoing line busbar; Described fixed contact is arranged on the upper end of fixed contact supporter, and described blowing nozzle is arranged on fixed contact supporter and is positioned at described fixed contact below.Because the position of blowing nozzle arranges properly, effectively reduce overall volume, and simplified structure.
(4), in the present embodiment, described operating mechanism comprises permanent-magnet electromagnetic actuating mechanism, insulating driving rod and supporting rod; Described permanent-magnet electromagnetic actuating mechanism is provided with telescopic actuating strut and solenoid; One end of described supporting rod is rotationally connected by the middle part of rotating shaft and described moving contact supporter, and the other end of described supporting rod is provided with waist hole, and by being connected through the rotating shaft in this waist hole and one end of insulating driving rod; The other end of described insulating driving rod is fixedly connected with described actuating strut.Compared with the disclosed electric locomotive DC quick circuit breaker of patent documentation CN2105761U, the operating mechanism of the present embodiment is comparatively simplified, and parts are less, is difficult for occurring mechanical breakdown, can long time stability operation.
(5), in the present embodiment, described operating mechanism is also included as described supporting rod provides the spring of reseting elasticity.In the time of divide-shut brake, this kind of operating mechanism be due to the existence of waist hole and spring, must buffering effect thereby have, and protection dynamic/static contact; In addition, along with the increase of divide-shut brake number of times, dynamic/static contact has certain wearing and tearing, but because this spring is after combined floodgate, by exerting pressure to supporting rod, thereby moving contact tightly can be pressed on fixed contact, effectively prevent between dynamic/static contact because wearing and tearing cause loose contact.
(6) in the present embodiment, also comprise also comprise an intelligent electronic controller and one be set on described incoming-line busbar for electric current being carried out to the DC current sensor of real time sample; Current value and the predetermined current value of described intelligent electronic controller to real time sample compares, and send the corresponding signal of telecommunication to normally closed solenoid valve and permanent-magnet electromagnetic actuating mechanism in the situation that of overcurrent and overload, control permanent-magnet electromagnetic actuating mechanism and make divide-shut brake action, and in separating brake, start described normally closed solenoid valve, make its conducting source of the gas, make gases at high pressure enter in blowing nozzle and from the gas outlet of blowing nozzle and blow to electric arc through pipeline.Utilize this intelligent electronic controller and DC current sensor can effectively realize intellectualized operation.
(7), in the present embodiment, described arc-extinguishing mechanism also comprises a coil that draws arc extinguishing for magnetic; Described coil is arranged on the side away from fixed contact of moving contact, and described hub of a spool is just to described fixed contact setting.This coil, in the time of separating brake, produces a magnetic field, thereby electric arc is introduced in arc-extinguish chamber fast, further increases arc extinguishing speed.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And these belong to apparent variation or the variation that connotation of the present invention extends out and still belong to protection scope of the present invention.
Claims (5)
1. a gas blast arc-quenching type AC permanent magnet intelligent circuit breaker, comprises pedestal (1), incoming-line busbar (2), the moving contact (3) being electrically connected with described incoming-line busbar (2), moving contact supporter (4), fixed contact (5), the outgoing line busbar (6) being electrically connected with described fixed contact (5), fixed contact supporter (7), for driving moving contact (3) to do the operating mechanism (8) of divide-shut brake action and the arc-extinguishing mechanism (9) for arc extinguishing; Described arc-extinguishing mechanism (9) comprises arc-extinguish chamber (91) and arc leading angle (92);
It is characterized in that:
Described arc-extinguishing mechanism (9) also comprise one for close or the normally closed solenoid valve (93) of conducting and extraneous source of the gas connecting pipeline and one for blowing fast the blowing nozzle (94) of power-off arc; The air inlet (941) of described blowing nozzle (94) is communicated with normally closed solenoid valve (93) by pipeline; The electric arc setting producing between dynamic/static contact when the gas outlet (942) of described blowing nozzle (94) faces separating brake; Described operating mechanism (8) comprises permanent-magnet electromagnetic actuating mechanism (81), insulating driving rod (82) and supporting rod (83); Described permanent-magnet electromagnetic actuating mechanism (81) is provided with telescopic actuating strut (811) and solenoid; One end of described supporting rod (83) is rotationally connected by the middle part of rotating shaft and described moving contact supporter (4), the other end of described supporting rod (83) is provided with waist hole (831), and is connected with one end of insulating driving rod (82) by the rotating shaft through this waist hole; The other end of described insulating driving rod (82) is fixedly connected with described actuating strut (811); Described operating mechanism (8) is also included as described supporting rod (83) provides the spring (84) of reseting elasticity; Described moving contact supporter (4) is electrically connected with described incoming-line busbar (2); The upper end of described moving contact supporter (4) is provided with moving contact (3), and the lower end of described moving contact supporter (4) is rotated and is arranged on pedestal (1); The shape of described blowing nozzle (94) is triangle or toroidal; Actuating strut (811) in described permanent-magnet electromagnetic actuating mechanism (81) is horizontally disposed with, and described insulating driving rod (82) and supporting rod (83) can reciprocatingly move by along continuous straight runs under the drive of actuating strut (811); Described supporting rod (83), in doing horizontal linear and moving back and forth, drives described moving contact supporter (4) reciprocating rotation certain angle, thereby realizes the breaking-closing operating of moving contact (3) and fixed contact (5).
2. gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 1, it is characterized in that: described incoming-line busbar (2) and outgoing line busbar (6) are all horizontally disposed binding posts, and outgoing line busbar (6) is arranged on the top of incoming-line busbar (2); Described moving contact (3) is positioned at left side, and described moving contact supporter (4) is fixed on described outgoing line busbar (6); Described fixed contact supporter (7) is positioned at right side, described permanent-magnet electromagnetic actuating mechanism (81) and described normally closed solenoid valve (93) are arranged on pedestal, and described permanent-magnet electromagnetic actuating mechanism (81) is arranged on normally closed solenoid valve (93) top; Described arc-extinguish chamber (91) is arranged on the top of moving contact (3) and fixed contact (5).
3. gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 1, is characterized in that: also comprise an intelligent electronic controller and one be set on the cable being electrically connected with incoming-line busbar for electric current being carried out to the DC current sensor (100) of real time sample.
4. gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 3, it is characterized in that: current value and the predetermined current value of described intelligent electronic controller to real time sample compares, and send the corresponding signal of telecommunication to normally closed solenoid valve (93) and permanent-magnet electromagnetic actuating mechanism (81) in the situation that of overcurrent and overload, control permanent-magnet electromagnetic actuating mechanism (81) and make divide-shut brake action, and in separating brake, start described normally closed solenoid valve (93), make its conducting source of the gas, and then make gases at high pressure enter in blowing nozzle (94) and from the gas outlet (942) of blowing nozzle (94) and blow to electric arc through pipeline.
5. gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 1, is characterized in that: described arc-extinguishing mechanism (9) also comprises a coil block (95) that draws arc extinguishing for magnetic; Described coil block (95) comprises and is provided with the rectangular core (951) of breach (9511) and is set in the coil (952) on iron core (951); Described moving contact (3) is arranged in the middle of described breach (9511) with fixed contact (5); Described coil (952) is electrically connected with described incoming-line busbar (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910100918.2A CN101615536B (en) | 2009-08-06 | 2009-08-06 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
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| CN200910100918.2A CN101615536B (en) | 2009-08-06 | 2009-08-06 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
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| CN101615536B true CN101615536B (en) | 2014-07-09 |
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| CN105517384B (en) * | 2015-12-01 | 2019-03-29 | 法腾电力科技有限公司 | Busbar under 550 Electric Appliance Cabinet arc side dog-ears |
| CN108172429B (en) * | 2017-12-21 | 2019-07-19 | 德力西电气有限公司 | A kind of structure of contact terminal with air-sweeping type arc extinguishing structure |
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|---|---|---|---|---|
| CN86204642U (en) * | 1986-09-17 | 1987-06-24 | 上海立新电器厂 | Direct-current magnetic field circuit breaker |
| CN1564292A (en) * | 2004-04-19 | 2005-01-12 | 西安交通大学 | Low voltage current-limiting breaker based on forced air explusion |
| CN201048116Y (en) * | 2007-06-16 | 2008-04-16 | 李乾伟 | Permanent-magnet relay |
| CN101430986A (en) * | 2008-11-21 | 2009-05-13 | 郑文秀 | Outdoor high-voltage permanent magnet type vacuum circuit breaker |
| CN201518303U (en) * | 2009-08-06 | 2010-06-30 | 乐清市牵引机电厂 | Gas blast arc-quenching type direct current permanent-magnet intelligent breaker |
| CN201616397U (en) * | 2009-08-06 | 2010-10-27 | 乐清市牵引机电厂 | Permanent-magnet switching on/off DC intelligent circuit breaker |
-
2009
- 2009-08-06 CN CN200910100918.2A patent/CN101615536B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86204642U (en) * | 1986-09-17 | 1987-06-24 | 上海立新电器厂 | Direct-current magnetic field circuit breaker |
| CN1564292A (en) * | 2004-04-19 | 2005-01-12 | 西安交通大学 | Low voltage current-limiting breaker based on forced air explusion |
| CN201048116Y (en) * | 2007-06-16 | 2008-04-16 | 李乾伟 | Permanent-magnet relay |
| CN101430986A (en) * | 2008-11-21 | 2009-05-13 | 郑文秀 | Outdoor high-voltage permanent magnet type vacuum circuit breaker |
| CN201518303U (en) * | 2009-08-06 | 2010-06-30 | 乐清市牵引机电厂 | Gas blast arc-quenching type direct current permanent-magnet intelligent breaker |
| CN201616397U (en) * | 2009-08-06 | 2010-10-27 | 乐清市牵引机电厂 | Permanent-magnet switching on/off DC intelligent circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101615536A (en) | 2009-12-30 |
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