CN101615536A - 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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- CN101615536A CN101615536A CN200910100918A CN200910100918A CN101615536A CN 101615536 A CN101615536 A CN 101615536A CN 200910100918 A CN200910100918 A CN 200910100918A CN 200910100918 A CN200910100918 A CN 200910100918A CN 101615536 A CN101615536 A CN 101615536A
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Abstract
The invention discloses a kind of gas blast arc-quenching type AC permanent magnet intelligent circuit breaker, comprise pedestal, inlet wire busbar, the moving contact that is electrically connected with described inlet wire busbar, moving contact supporter, fixed contact, the outlet busbar that is electrically connected with described fixed contact, fixed contact supporter, be used to drive the arc-extinguishing mechanism that moving contact is made the operating mechanism of divide-shut brake action and is used for arc extinguishing; Described arc-extinguishing mechanism comprises arc-extinguish chamber and arc leading angle; Described arc-extinguishing mechanism comprises that also one is used to close or normally closed solenoid valve and a blowing nozzle that is used for blowing fast the outage arc of conducting and extraneous source of the gas connecting pipeline; The air inlet of described blowing nozzle is communicated with normally closed solenoid valve by pipeline.The present invention utilizes gases at high pressure to blow the outage arc fast when separating brake, effectively reduces arc length, and electric arc is blown into blow-out in the arc-extinguish chamber fast, thereby greatly improve arc extinguishing speed.
Description
Technical field
The invention belongs to the 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 the industrial-mineral electric locomotive, and direct current machine is made short circuit or overload protection usefulness.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 big, opening time is long, for this reason, must strengthen diameter of wire, strengthen the electromagnet size, thereby make whole circuit breaker volume become big.Because the electromagnet size strengthens caused self overheated and impulsive force, is difficult to satisfy the frequent operation requirement of electric locomotive.
Patent documentation CN2105761U discloses a kind of electric locomotive direct current quick breaker, form 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 pass through 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, break down easily, are difficult to move reliably and with long-term; In addition, well-known, direct current is because inferred-zero, its arc extinguishing is compared with the alternating current arc extinguishing, and is comparatively difficult, and the arc quenching system of this kind dc circuit breaker is comparatively simple, only rely on arc extinguishing board that electric arc is guided in the arc-extinguish chamber, arc quenching effect is relatively poor, so its arc quenching effect is also needed improvement badly.
Summary of the invention
The purpose of this invention is to provide a kind of designs simplification, can blow the outage arc fast, 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, inlet wire busbar, the moving contact that is electrically connected with described inlet wire busbar, moving contact supporter, fixed contact, the outlet busbar that is electrically connected with described fixed contact, fixed contact supporter, is used to drive the arc-extinguishing mechanism that moving contact is made the operating mechanism of divide-shut brake action and is used for arc extinguishing; Described arc-extinguishing mechanism comprises arc-extinguish chamber and arc leading angle; Described arc-extinguishing mechanism comprises that also one is used to close or normally closed solenoid valve and a blowing nozzle that is used for blowing fast the outage arc of conducting and extraneous source of the gas connecting pipeline; The air inlet of described blowing nozzle is communicated with normally closed solenoid valve by pipeline.
In the technique scheme, the electric arc setting that produces between the dynamic/static contact when gas outlet of described blowing nozzle faces separating brake.
In the technique scheme, described fixed contact supporter is electrically connected with described outlet 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 the 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 the waist hole, and is connected with an end of insulating driving rod by the rotating shaft of passing this waist hole; The other end of described insulating driving rod is fixedlyed connected with described actuating strut.
In the technique scheme, described operating mechanism also is included as the spring that described supporting rod provides reseting elasticity; Described moving contact supporter is electrically connected with described inlet wire 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 the pedestal.
In the technique scheme, the shape of described blowing nozzle is triangle or toroidal; Actuating strut in the 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 drives described moving contact supporter and back and forth turns an angle when doing horizontal linear and moving back and forth, thereby realizes the breaking-closing operating of moving contact and fixed contact.
In the technique scheme, described inlet wire busbar and outlet busbar all are horizontally disposed binding posts, and the outlet busbar is arranged on the top of inlet wire busbar; Described moving contact is positioned at the left side, and described moving contact supporter is fixed on the described outlet busbar; Described fixed contact supporter is positioned at the right side, and described permanent-magnet electromagnetic actuating mechanism and described normally closed solenoid valve are arranged on the pedestal, and described permanent-magnet electromagnetic actuating mechanism is arranged on the normally closed solenoid valve top; Described arc-extinguish chamber is arranged on the top of moving contact and fixed contact.
In the technique scheme, also comprise an intelligent electronic controller and a DC current sensor that is used for electric current is carried out real time sample that is set on the described inlet wire.
In the technique scheme, described intelligent electronic controller compares the current value and the predetermined current value of real time sample, and under the situation of overcurrent and overload, send the corresponding signal of telecommunication to normally closed solenoid valve and permanent-magnet electromagnetic actuating mechanism, control permanent-magnet electromagnetic actuating mechanism is made the divide-shut brake action, and in separating brake, start described normally closed solenoid valve, make its conducting source of the gas, and then gases at high pressure are entered in the blowing nozzle through pipeline and blow to electric arc from the gas outlet of blowing nozzle.
In the technique scheme, described arc-extinguishing mechanism comprises that also is used for the coil block that magnetic draws arc extinguishing; Described coil block comprises rectangular core that is provided with breach and the coil that is set on the iron core; Described moving contact and fixed contact are arranged in the middle of the described breach; Described coil is electrically connected with described inlet wire busbar.
The present invention has positive effect: among (1) the present invention, because described arc-extinguishing mechanism comprises that also one is used to close 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 that is used for the steering current blow-off direction; The inner of described blowing nozzle also is that air inlet is communicated with normally closed solenoid valve by pipeline.When separating brake, the solenoid discharge of external intelligent electronic controller in the permanent-magnet electromagnetic actuating mechanism, also switch on simultaneously to normally closed solenoid valve, time remaining about 2 seconds, electromagnetically operated 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; This moment, dynamic/static contact separated, and electric arc produces, but under the effect of brushing of gases at high pressure, it is disconnected to make that electric arc is blown fast, thereby effectively reduces arc length; Because direct current has zero point unlike alternating current, so if do not blow the outage arc fast, 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 blow-out in the arc-extinguish chamber fast; So the present invention can effectively increase arc extinguishing speed, improve arc quenching effect.
(2) among the present invention, the outer end of described blowing nozzle also is the electric arc setting that the gas outlet produces when 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 the arc-extinguish chamber fast, reach quick arc quenching effect.
(3) among the present invention, described fixed contact supporter is electrically connected with described outlet busbar; Described fixed contact is arranged on the upper end of fixed contact supporter, and described blowing nozzle is arranged on the fixed contact supporter and is positioned at described fixed contact below.Because it is proper that the position of blowing nozzle is provided with, and effectively reduces overall volume, and simplified structure.
(4) among 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 the waist hole, and is connected with an end of insulating driving rod by the rotating shaft of passing this waist hole; The other end of described insulating driving rod is fixedlyed connected with described actuating strut.Compare with the disclosed electric locomotive direct current quick breaker of patent documentation CN2105761U, operating mechanism of the present invention is comparatively simplified, and parts are less, is difficult for taking place mechanical breakdown, can reliability service steady in a long-term.
(5) among the present invention, described operating mechanism also is included as the spring that described supporting rod provides reseting elasticity.When divide-shut brake, this kind operating mechanism is because the existence of waist hole and spring, must buffering effect thereby have, and the 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 behind combined floodgate, by exerting pressure, thereby can tightly be pressed in moving contact on the fixed contact, effectively prevent to cause loose contact because of wearing and tearing between the dynamic/static contact to supporting rod.
(6) among the present invention, also comprise also comprising an intelligent electronic controller and a DC current sensor that is used for electric current is carried out real time sample that is set on the described inlet wire busbar; Described intelligent electronic controller compares the current value and the predetermined current value of real time sample, and under the situation of overcurrent and overload, send the corresponding signal of telecommunication to normally closed solenoid valve and permanent-magnet electromagnetic actuating mechanism, control permanent-magnet electromagnetic actuating mechanism is made the 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 the blowing nozzle and blow to electric arc from the gas outlet of blowing nozzle through pipeline.Utilize this intelligent electronic controller and DC current sensor can effectively realize intellectualized operation.
(7) among the present invention, described arc-extinguishing mechanism comprises that also is used for the coil that magnetic draws arc extinguishing; Described coil is arranged on the side away from fixed contact of moving contact, and described hub of a spool is over against described fixed contact setting.This coil produces a magnetic field, thereby electric arc is introduced in the arc-extinguish chamber fast when separating brake, further increases arc extinguishing speed.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the structural representation of operating mechanism in the gas blast arc-quenching type AC permanent magnet intelligent circuit breaker shown in Figure 1;
Fig. 3 is the structural representation of coil block in the gas blast arc-quenching type AC permanent magnet intelligent circuit breaker among Fig. 2.
Be labeled as shown in the accompanying drawing: pedestal 1, inlet wire busbar 2, moving contact 3, moving contact supporter 4, fixed contact 5, outlet 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 the gas blast arc-quenching type AC permanent magnet intelligent circuit breaker shown in Figure 1; Fig. 3 is the structural representation of coil block in the gas blast arc-quenching type AC permanent magnet intelligent circuit breaker among Fig. 2.
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, inlet wire busbar 2, the moving contact 3 that is electrically connected with described inlet wire busbar 2, moving contact supporter 4, fixed contact 5, the outlet busbar 6, the fixed contact supporter 7 that are electrically connected with described fixed contact 5, be used to drive the arc-extinguishing mechanism 9 that moving contact 3 is made the operating mechanism 8 of divide-shut brake action and is used for arc extinguishing; Described arc-extinguishing mechanism 9 comprises that arc-extinguish chamber 91, arc leading angle 92, are used to close or the normally closed solenoid valve of conducting and extraneous source of the gas connecting pipeline 93, one be used for blowing fast the outage arc blowing nozzle 94, is communicated with the pipeline 96 of normally closed solenoid valve 93 and blowing nozzle 94 air inlets and one and is used for the coil block 95 that magnetic draws arc extinguishing.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; Present embodiment is selected triangle for use, the electric arc setting that produces between the dynamic/static contact when 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 outlet 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 rectangular core 951 that is provided with breach 9511 and the coil 952 that is set on unshakable in one's determination 951; Described moving contact 3 is arranged in the middle of the described breach 9511 with fixed contact 5; Described coil 952 is electrically connected with described inlet wire busbar 2.
See Fig. 2, described operating mechanism 8 comprises permanent-magnet electromagnetic actuating mechanism 81, insulating driving rod 82, supporting rod 83 and the spring 84 of reseting elasticity is provided 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 an end be provided with breach 832, be enclosed within on the 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 be, bearing pin inserts in the axis hole of the waist hole 831 of axis hole, supporting rod of connecting plate 85 and insulating driving rod 82 ends simultaneously, and the three is coupled together simultaneously; The other end of described insulating driving rod 82 is fixedlyed connected with described actuating strut 811.
The external diameter of an 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 the one end is against on the supporting rod 83, and the other end is against on the connecting plate 85; Because the cooperation in spring 84 and waist hole 831 makes moving contact when closing a floodgate with fixed contact, has 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 is very fast, if there is not cushioning effect, will be easy to damage dynamic/static contact.
Described moving contact supporter 4 is electrically connected with described inlet wire 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 the pedestal 1.
Actuating strut 811 in the 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 drives described moving contact supporter 4 and back and forth turns an angle when doing horizontal linear and moving back and forth, thereby realizes the breaking-closing operating of moving contact 3 and fixed contact 5.
In the present embodiment, described inlet wire busbar 2 and outlet busbar 6 all are horizontally disposed binding posts, and outlet busbar 6 is arranged on the top of inlet wire busbar 2; Described fixed contact 5 is positioned at the pedestal left-hand end, and described fixed contact supporter 7 is fixed on the described outlet busbar 6; Described moving contact supporter 4 is positioned at the pedestal right-hand end, and described permanent-magnet electromagnetic actuating mechanism 81 and described normally closed solenoid valve 93 are arranged on the 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.
Present embodiment also comprises an intelligent electronic controller (not drawing on the figure) and a DC current sensor 100 that is used for electric current is carried out real time sample that is set on the described inlet wire.The described DC current sensor 100 preferred Hall current sensors that adopt.Described intelligent electronic controller compares the current value and the predetermined current value of real time sample, and under the situation of overcurrent and overload, send the corresponding signal of telecommunication to normally closed solenoid valve 93 and permanent-magnet electromagnetic actuating mechanism 81, control permanent-magnet electromagnetic actuating mechanism 81 is made the divide-shut brake action, and in separating brake, start described normally closed solenoid valve 93, make its conducting source of the gas, and then gases at high pressure are entered in the blowing nozzle 94 through pipeline and blow to electric arc from the gas outlet 942 of blowing nozzle 94.
Present embodiment is mainly used under the high-voltage great-current operational environment, and its operating voltage is 1500V, and rated operational current can transfer to 1800A to 3000A; Intelligent electronic controller matches with high performance Hall current sensor, can be when the work operation, running current is close to real-time tracking and monitoring, its rated operational current maximum can also be selected in 1800A to 3000A scope and choose simultaneously, after in case circuital current exceeds preset value, or after short circuit and the overload, intelligent electronic controller can provide sub-gate signal rapidly in the time in 0.012 millisecond.
When the needs separating brake, under intelligent electronic controller control, the electromagnetism switching winding energising in the 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.At this moment, gases at high pressure in the external high-pressure air source enter into the air inlet 941 of blowing nozzle through normally closed solenoid valve 93, pipeline 96, finally blow to electric arc (see among Fig. 1 shown in the arrow) from the gas outlet 942 of blowing nozzle; When dynamic/static contact has just separated, produce arcing therebetween, brush down at gases at high pressure, it is disconnected that the very fast quilt of arcing blows, thereby effectively reduce arcing length, is beneficial to blow-out.
Gases at high pressure continue to brush down, 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 arc-extinguish chamber rapidly 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 be select for use the high metal of fusing point for example silver strip make the skeleton of porous body, again that fusing point is lower silver tungsten powder be placed on above the porous body skeleton or below, be warming up to below the skeleton fusing point, more than the silver tungsten fusing point, because silver tungsten powder smelting, the porous body skeleton does not melt, silver tungsten after dissolving is filled in the hole of porous body skeleton, thus the dense product that forms.Its advantage is that the contact of making (also claiming the contact) has good electrical conductivity and workability, both had the high-melting-point, high rigidity, anti-arc erosion, anti-melting welding of tungsten, the characteristics that material transfer is few, its maximum characteristics are exactly strong to the ability to bear of large-current electric arc, are not prone to bad phenomenon such as fusing, degree shape, be full of cracks, bubbling.
Present embodiment has the following advantages: in (1) present embodiment, because described arc-extinguishing mechanism comprises that also one is used to close 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 that is used for the steering current blow-off direction; The inner of described blowing nozzle also is that air inlet is communicated with normally closed solenoid valve by pipeline.When separating brake, the solenoid discharge of external intelligent electronic controller in the permanent-magnet electromagnetic actuating mechanism, also switch on simultaneously to normally closed solenoid valve, time remaining about 2 seconds, electromagnetically operated 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; This moment, dynamic/static contact separated, and electric arc produces, but under the effect of brushing of gases at high pressure, it is disconnected to make that electric arc is blown fast, thereby effectively reduces arc length; Because direct current has zero point unlike alternating current, so if do not blow the outage arc fast, 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 blow-out in the arc-extinguish chamber fast; So present embodiment can effectively increase arc extinguishing speed, improve arc quenching effect.
(2) in the present embodiment, the outer end of described blowing nozzle also is the electric arc setting that the gas outlet produces when 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 the arc-extinguish chamber fast, reach quick arc quenching effect.
(3) in the present embodiment, described fixed contact supporter is electrically connected with described outlet busbar; Described fixed contact is arranged on the upper end of fixed contact supporter, and described blowing nozzle is arranged on the fixed contact supporter and is positioned at described fixed contact below.Because it is proper that the position of blowing nozzle is provided with, and effectively reduces 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 the waist hole, and is connected with an end of insulating driving rod by the rotating shaft of passing this waist hole; The other end of described insulating driving rod is fixedlyed connected with described actuating strut.Compare with the disclosed electric locomotive direct current quick breaker of patent documentation CN2105761U, the operating mechanism of present embodiment is comparatively simplified, and parts are less, is difficult for taking place mechanical breakdown, can reliability service steady in a long-term.
(5) in the present embodiment, described operating mechanism also is included as the spring that described supporting rod provides reseting elasticity.When divide-shut brake, this kind operating mechanism is because the existence of waist hole and spring, must buffering effect thereby have, and the 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 behind combined floodgate, by exerting pressure, thereby can tightly be pressed in moving contact on the fixed contact, effectively prevent to cause loose contact because of wearing and tearing between the dynamic/static contact to supporting rod.
(6) in the present embodiment, also comprise also comprising an intelligent electronic controller and a DC current sensor that is used for electric current is carried out real time sample that is set on the described inlet wire busbar; Described intelligent electronic controller compares the current value and the predetermined current value of real time sample, and under the situation of overcurrent and overload, send the corresponding signal of telecommunication to normally closed solenoid valve and permanent-magnet electromagnetic actuating mechanism, control permanent-magnet electromagnetic actuating mechanism is made the 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 the blowing nozzle and blow to electric arc from the gas outlet of blowing nozzle 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 comprises that also is used for the coil that magnetic draws arc extinguishing; Described coil is arranged on the side away from fixed contact of moving contact, and described hub of a spool is over against described fixed contact setting.This coil produces a magnetic field, thereby electric arc is introduced in the arc-extinguish chamber fast when separating brake, further increases arc extinguishing speed.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be qualification 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 need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that connotation of the present invention extends out and still belong to protection scope of the present invention.
Claims (10)
1, a kind of gas blast arc-quenching type AC permanent magnet intelligent circuit breaker comprises pedestal (1), inlet wire busbar (2), the moving contact (3) that is electrically connected with described inlet wire busbar (2), moving contact supporter (4), fixed contact (5), the outlet busbar (6) that is electrically connected with described fixed contact (5), fixed contact supporter (7), is used to drive the arc-extinguishing mechanism (9) that moving contact (3) is made the operating mechanism (8) of divide-shut brake action and is used 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) comprises that also one is used to close or normally closed solenoid valve (93) and a blowing nozzle (94) that is used for blowing fast the outage arc of conducting and extraneous source of the gas connecting pipeline; The air inlet (941) of described blowing nozzle (94) is communicated with normally closed solenoid valve (93) by pipeline.
2, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 1 is characterized in that: the electric arc setting that the gas outlet (942) of described blowing nozzle (94) produces between the dynamic/static contact when facing separating brake.
3, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 2 is characterized in that: described fixed contact supporter (7) is electrically connected with described outlet 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) below.
4, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 2 is characterized in that: 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), and the other end of described supporting rod (83) is provided with waist hole (831), and is connected with an end of insulating driving rod (82) by the rotating shaft of passing this waist hole; The other end of described insulating driving rod (82) is fixedlyed connected with described actuating strut (811).
5, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 4 is characterized in that: described operating mechanism (8) also is included as the spring (84) that described supporting rod (83) provides reseting elasticity; Described moving contact supporter
(4) be electrically connected with described inlet wire 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 the pedestal (1).
6, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 5 is characterized in that: the shape of described blowing nozzle (94) is triangle or toroidal; Actuating strut (811) in the 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) drives described moving contact supporter (4) and back and forth turns an angle when doing horizontal linear and moving back and forth, thereby realizes the breaking-closing operating of moving contact (3) and fixed contact (5).
7, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 6 is characterized in that: described inlet wire busbar (2) and outlet busbar (6) all are horizontally disposed binding posts, and outlet busbar (6) is arranged on the top of inlet wire busbar (2); Described moving contact (3) is positioned at the left side, and described moving contact supporter (4) is fixed on the described outlet busbar (6); Described fixed contact supporter (7) is positioned at the right side, and described permanent-magnet electromagnetic actuating mechanism (81) and described normally closed solenoid valve (93) are arranged on the 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).
8, 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 a DC current sensor (100) that is used for electric current is carried out real time sample that is set on the described inlet wire.
9, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 8, it is characterized in that: described intelligent electronic controller compares the current value and the predetermined current value of real time sample, and under the situation of overcurrent and overload, send the corresponding signal of telecommunication to normally closed solenoid valve (93) and permanent-magnet electromagnetic actuating mechanism (81), control permanent-magnet electromagnetic actuating mechanism (81) is made the divide-shut brake action, and in separating brake, start described normally closed solenoid valve (93), make its conducting source of the gas, and then gases at high pressure are entered in the blowing nozzle (94) through pipeline and blow to electric arc from the gas outlet (942) of blowing nozzle (94).
10, gas blast arc-quenching type AC permanent magnet intelligent circuit breaker according to claim 1 is characterized in that: described arc-extinguishing mechanism (9) comprises that also is used for the coil block (95) that magnetic draws arc extinguishing; Described coil block (95) comprises the rectangular core (951) that is provided with breach (9511) and is set in coil (952) on the iron core (951); Described moving contact (3) is arranged in the middle of the described breach (9511) with fixed contact (5); Described coil (952) is electrically connected with described inlet wire busbar (2).
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101615536A true CN101615536A (en) | 2009-12-30 |
| CN101615536B CN101615536B (en) | 2014-07-09 |
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| CN200910100918.2A Expired - Fee Related CN101615536B (en) | 2009-08-06 | 2009-08-06 | Gas blast arc-quenching type AC permanent magnet intelligent circuit breaker |
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| CN (1) | CN101615536B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517384A (en) * | 2015-12-01 | 2016-04-20 | 上海法腾电力科技有限公司 | Conductive bus below arc-edge bevel of 550 electrical cabinet |
| CN108172429A (en) * | 2017-12-21 | 2018-06-15 | 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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| 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 |
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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 |
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| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105517384A (en) * | 2015-12-01 | 2016-04-20 | 上海法腾电力科技有限公司 | Conductive bus below arc-edge bevel of 550 electrical cabinet |
| CN108172429A (en) * | 2017-12-21 | 2018-06-15 | 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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|---|---|
| CN101615536B (en) | 2014-07-09 |
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