CN105788986A - Arc extinguishing device for direct current breakers - Google Patents
Arc extinguishing device for direct current breakers Download PDFInfo
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- CN105788986A CN105788986A CN201610326520.0A CN201610326520A CN105788986A CN 105788986 A CN105788986 A CN 105788986A CN 201610326520 A CN201610326520 A CN 201610326520A CN 105788986 A CN105788986 A CN 105788986A
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- arc
- plate
- aerogenesis
- housing
- space
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
Abstract
The invention provides an arc extinguishing device for direct current breakers. An arc extinguish chamber is mounted on a second case body and is provided with a side opening which is opposite to a first case body; a gas generating cover is mounted at a lower part inside the arc extinguish chamber and comprises two gas generating plates which are oppositely arranged and a baffle plate; the baffle plate is opposite to the side opening and is arranged closely to the second case body; a moving contact and a fixed contact are mounted inside an installing space; the breaking position is inside a hold space and is close to the baffle plate; when arc is generated during the breaking of the moving contact and the fixed contact, the gas generating plate and the baffle plate are triggered by the arc, and large quantity of gas is generated to push the arc to move in a direction away from the baffle plate; one side, facing the hold space, of arc extinction chute plates installed at the upper side of the inside of the arc extinguish chamber is provided with a lower part opening; the lower part opening is tapering in the direction from the second case body to the first case body; the arc is blocked by the arc extinction chute plates with tapering lower part opening continuously during movement so that the arc cannot rush out from the side opening of the arc extinguish chamber but can only enter the space between the arc extinction chutes and be extinguished as soon as possible.
Description
Technical field
The present invention relates to dc circuit breaker arc extinguishing technical field, be specifically related to a kind of Arc-extinguishing Devices of DC Circuit Breakers.
Background technology
Low-voltage circuit breaker is a kind of important power transmission and distribution electrical equipment, plays the important function of distribution electric energy protection equipment and personal security in the line.Low-voltage circuit breaker can be divided into AC circuit breaker and dc circuit breaker by its use system.In normal operating conditions, low-voltage circuit breaker passes through Guan Bi or the disconnection of contact, it is achieved distribution and the control to power load.When breaking down in circuit, chopper detects fault-signal, electrical apparatus release action, makes contact disjunction, open failure circuit.When circuit is short-circuited fault time, when disjunction short circuit current, quickly extinguishing electric arc is the essential condition ensureing the reliable disjunction of chopper.In AC system, owing to alternating current has zero crossing, the extinguishing of electric arc is relatively easy, and unidirectional current does not have zero crossing, and the extinguishing of electric arc is relatively difficult comparatively speaking.Way popular at present is to strengthen arc quenching effect by installing permanent magnet additional, though this kind of method is conducive to arc extinguishing, but limits the both positive and negative polarity connection type of chopper.
Chinese patent literature CN204067289U discloses a kind of direct current breaker of plastic casing, including the first shell removably connected and second housing, arc-chutes it are provided with in second housing, some uniform arc extinguishing grid pieces it are provided with in arc-chutes, arc-chutes include the upper port corresponding with the first shell, being correspondingly provided with aerogenesis frame with arc extinguishing grid pieces in arc-chutes, one end of aerogenesis frame is located between the first shell and upper port and covers upper port.Aerogenesis frame includes two aerogenesis arms being oppositely arranged, and one end of two aerogenesis arms is provided with shutter, and shutter is located between the first shell and upper port and covers upper port.
Direct current breaker of plastic casing in this patent documentation, although not installing permanent magnet additional to strengthen arc quenching effect, both positive and negative polarity connection type without limitation on chopper, but it is additionally arranged shutter between the upper port and the first shell of arc-chutes, although such design can avoid the air pressure produced during arc burning to leak from this, and it can be avoided that avulsion the first shell, but occur the problem that the accompanying drawing 6 from its description can be seen that, the breakpoint of dynamic/static contact is near second housing, and away from shutter, when dynamic/static contact disjunction produces electric arc, aerogenesis arm near electric arc is heated aerogenesis, electric arc is promoted to move to the position near shutter；Moving closer in the moving process of shutter at electric arc, under the effect of blocking of shutter, air pressure raises rapidly, and then causes the retard motion of electric arc, and then causes that displacement shortens, and under bigger gas pressure, electric arc can only up move to arc extinguishing grid pieces；Owing to the displacement of electric arc is short, the electric arc moved upward can only contact with this part arc extinguishing grid pieces near dynamic/static contact breakpoint, most arc extinguishing grid pieces can not be made full use of, cause that this part arc extinguishing grid pieces heats up rapidly, it is unfavorable for the fast cooling of electric arc, and then it is unfavorable for that the quick of electric arc is extinguished, if electric arc extinguishes not yet after traverse arc extinguishing grid pieces, can bring about danger.
Summary of the invention
Therefore; the technical problem to be solved in the present invention is in that to overcome arc-control device of the prior art to set up shutter between the first shell and the upper port of arc-chutes; cause that electric arc displacement in arc-chutes shortens; and then cause making full use of major part arc extinguishing grid pieces; so that the technological deficiency that electric arc not easily extinguishes; thus providing one can protect shell, most arc extinguishing grid pieces can be made full use of again and improve the Arc-extinguishing Devices of DC Circuit Breakers of arc quenching effect.
For this, the present invention provides a kind of Arc-extinguishing Devices of DC Circuit Breakers, including:
First housing；
Second housing, relative with described first housing and be secured to connect, to form internally installed space；
Arc-chutes, are arranged on described second housing and are positioned at inside described installing space, have the side opening relative with described first housing；
Aerogenesis cover, it is arranged on the lower inside of described arc-chutes, including the first aerogenesis plate being oppositely arranged and the second aerogenesis plate, and connect described first aerogenesis plate and described second aerogenesis plate to form the shutter holding space, described shutter is relative with described side opening and arranges near described second housing, and described first aerogenesis plate, the second aerogenesis plate and described shutter are aerogenesis material；
Dynamic and static contact, is arranged on inside described installing space, and disjunction place of described dynamic and static contact is positioned at described accommodation interior volume, and near described shutter；
Arc extinguishing grid pieces, has several, is arranged on the inner upper of described arc-chutes, has the lower openings relative with described accommodation space, and the openings of sizes of described lower openings is gradually reduced along described second housing to described first housing direction.
As a kind of preferred version, described first housing is provided with first extension plate relative with described first aerogenesis plate, and second extension plate relative with described second aerogenesis plate, described first extension plate and the second extension plate stretch into inside described arc-chutes, are formed and connect and clearance space opposing upper and lower with described arc extinguishing grid pieces with described accommodation space.
As a kind of preferred version, described first aerogenesis plate and described second aerogenesis plate be arranged in parallel, and the medial surface of described first aerogenesis plate and described second aerogenesis plate is formed with some towards the raised plate extended each other, forming groove between two raised plate of arbitrary neighborhood, the development length of described raised plate is gradually increased along the direction away from described arc extinguishing grid pieces.
As a kind of preferred version, described first extension plate and described second extension plate are obliquely installed, and form the described clearance space that the big under shed of upper shed is little.
As a kind of preferred version, described lower openings is circular arc opening.
As a kind of preferred version, described arc-chutes include the first dividing plate and the second partition installed in described installing space, and described first dividing plate and described second partition are oppositely arranged to form the space for installing described aerogenesis cover and described arc extinguishing grid pieces.
As a kind of preferred version, described first aerogenesis plate is parallel relative with described first dividing plate, and described second aerogenesis plate is parallel with described second partition relative；The two opposite side walls of described arc extinguishing grid pieces is separately fixed on described first dividing plate and described second partition, and lays respectively between described first aerogenesis plate and described first dividing plate, and between described second aerogenesis plate and described second partition.
As a kind of preferred version, also including labyrinth arc extinguishing structure, described labyrinth arc extinguishing structure is arranged on inside described installing space, and has labyrinth channel, the one end open of the described labyrinth channel electric arc that with reception is not off relative to described arc extinguishing grid pieces, other end opening and atmosphere.
As a kind of preferred version, described labyrinth arc extinguishing structure is formed with described first housing, the second housing and seals space, the other end opening of described labyrinth channel connects with described sealing space, and described first housing and/or described second housing are provided with the air vent connected with described sealing space.
As a kind of preferred version, described labyrinth arc extinguishing structure includes:
Side installing plate is two and is oppositely arranged；
First flat board, being at least two-layer, each layer all has several, and the two ends of each are fixed on the inwall of two described side installing plates, and described in any two of same layer, between the first flat board, forming the first gap, described first flat board being positioned on different layers is relative up and down；
Starting stave, is at least one layer, and each layer all has several, and the two ends up and down of each are connected with two described first flat boards opposing upper and lower respectively；
Second flat board, one end is fixed on described starting stave, the other end extends towards another second riser close with described starting stave, and form the second gap with the second riser another described, two described first gaps opposing upper and lower are blocked by described second flat board, and several described first gaps and several described second gaps form described labyrinth channel.
Arc-extinguishing Devices of DC Circuit Breakers provided by the invention, has the advantage that
1. the Arc-extinguishing Devices of DC Circuit Breakers of the present invention, arc-chutes are installed on the second housing, and there is the side opening relative with the first housing, aerogenesis cover is arranged on the lower inside of arc-chutes, including the first aerogenesis plate being oppositely arranged, the second aerogenesis plate and the shutter connecting both, shutter is relative with side opening and arranges near the second housing, and dynamic and static contact is arranged on inside installing space, and disjunction place is positioned at accommodation interior volume, and near shutter；When dynamic and static contact disjunction produces electric arc, first aerogenesis plate, the second aerogenesis plate and shutter are triggered by the electric arc of high temperature, produce a large amount of gas, gas push electric arc moves away from the direction of shutter, electric arc is in the process of movement, the aerogenesis plate of both sides is constantly heated aerogenesis, blows electric arc accelerated motion obliquely upward；Several arc extinguishing grid pieces being arranged on arc-chutes inner upper are provided with lower openings towards the side holding space, and pilot arc enters the gap between arc extinguishing grid pieces, and electric arc is lowered the temperature so that it is extinguish；Owing to the size of lower openings is gradually reduced along the second housing to the direction of the first housing, electric arc is in the process of movement, constantly it is subject to the stop of the less arc extinguishing grid pieces of lower openings, make it can not go out from the side opening of arc-chutes, can only enter the space between arc extinguishing grid pieces, utilize most arc extinguishing grid pieces that electric arc is lowered the temperature, promote it to extinguish as early as possible；Shutter can not only prevent electric arc from going out arc-chutes, also encloses, with the first aerogenesis plate, the second aerogenesis plate, the accommodation space defining a relative closure, after excited generation gas by the high temperature of electric arc, increases gas pressure, it is possible to blow electric arc accelerated motion；Compared with prior art, the Arc-extinguishing Devices of DC Circuit Breakers of the present invention, the first housing can not only be protected not by avulsion, moreover it is possible to make full use of most arc extinguishing grid pieces and improve arc quenching effect.
2. the Arc-extinguishing Devices of DC Circuit Breakers of the present invention, first housing is provided with first extension plate relative with the first aerogenesis plate, second extension plate relative with the second aerogenesis plate, first extension plate and the second extension plate stretch into inside arc-chutes, are formed and connect and clearance space opposing upper and lower with arc extinguishing grid pieces with accommodation space；The clearance space that first extension plate and the second extension plate are formed connects with holding space, increases the horizontal movement scope of electric arc, provides space for weakening arc energy further.
3. the Arc-extinguishing Devices of DC Circuit Breakers of the present invention, the medial surface of the first aerogenesis plate and the second aerogenesis plate is formed with some towards the raised plate extended each other, forms groove between two raised plate of arbitrary neighborhood；Electric arc produces and after being blown by gas, the raised plate that aerogenesis plate is arranged and groove, it is possible to increase the area that electric arc contacts with aerogenesis plate, advantageously reduces the temperature of electric arc, and is conducive to producing more substantial gas and blows electric arc and move upward；The development length of raised plate is gradually increased along the direction away from arc extinguishing grid pieces, it is possible to stop that electric arc moves downward, it is prevented that electric arc goes out downwards arc-chutes.
4. the Arc-extinguishing Devices of DC Circuit Breakers of the present invention, first extension plate and the second extension plate are obliquely installed, and the big under shed of clearance space upper shed of formation is little, it is possible to coordinate with aerogenesis cover, play pilot arc and be upwardly into arc extinguishing grid pieces, and prevent electric arc from going out downwards the effect of arc-chutes.
5. the Arc-extinguishing Devices of DC Circuit Breakers of the present invention, also including labyrinth arc extinguishing structure, labyrinth arc extinguishing structure is arranged on above arc extinguishing grid pieces, has labyrinth channel, the one end open of the labyrinth channel electric arc that with reception do not extinguish relative to arc extinguishing grid pieces, other end opening and atmosphere；The effect of labyrinth channel is in that to receive the electric arc extinguished not yet after arc extinguishing grid pieces, and it is further lowered the temperature so that it is extinguish；Labyrinth channel not only increases the movement length of electric arc, and the motion returning electric arc causes resistance so that the time that electric arc retains in labyrinth channel is longer, it is possible to lower the temperature more fully, is beneficial to the extinguishing of electric arc.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in prior art or the specific embodiment of the invention, the accompanying drawing used in below prior art or detailed description of the invention being described is briefly described, apparently, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the overall structure schematic diagram of Arc-extinguishing Devices of DC Circuit Breakers in the embodiment of the present invention.
Fig. 2 is the relative position figure of the first housing and arc-control device in Fig. 1.
Fig. 3 is the structure enlarged diagram of part A in Fig. 2.
Fig. 4 is the relative position figure of the second housing and arc-control device in Fig. 1.
Fig. 5 is the structure enlarged diagram of part B in Fig. 4.
Fig. 6 is the combination installation diagram of arc-chutes, arc extinguishing grid pieces, aerogenesis cover and static contact.
Fig. 7 is another view of Fig. 6.
Fig. 8 is the detonation configuration schematic diagram of Fig. 6.
Fig. 9 is the axonometric chart of aerogenesis cover.
Figure 10 is the axonometric chart of arc extinguishing grid pieces.
Figure 11 is the detonation configuration figure of arc extinguishing labyrinth structure.
Figure 12 is the schematic enlarged-scale view of C portion in Figure 11.
Figure 13 is structure chart during dynamic/static contact contact connection.
nullAccompanying drawing labelling: 1-the first housing，11-the first extension plate，12-the second extension plate，13-clearance space，14-air vent，2-the second housing，10-installing space，3-arc-chutes，30-side opening，31-the first dividing plate，32-second partition，4-aerogenesis cover，40-holds space，41-the first aerogenesis plate，411-the first extension，412-the first grab，42-the second aerogenesis plate，421-the second extension，422-the second grab，43-shutter，431-the 3rd extension，432-space，44-raised plate，45-groove，46-stationary contact through hole，5-moving contact，51-the second extension，6-static contact，60-stationary contact，61-the first extension，62-the first connecting portion，63-the 3rd extension，64-the second connecting portion，65-wire connecting portion，7-arc extinguishing grid pieces，71-lower openings，8-labyrinth arc extinguishing structure，80-seals space，81-the first flat board，811-the first gap，82-the second flat board，821-the second gap，83-starting stave，84-side installing plate，85-labyrinth channel，9-protection board，91-the first protection board，911-the first card interface，912-the second card interface，92-the second protection board.
Detailed description of the invention
Below in conjunction with Figure of description, technical scheme is described, it is clear that following embodiment is not the embodiment that the present invention is whole.Based on embodiment described in the invention, the every other embodiment that those of ordinary skill in the art obtain under not making other creative work premises, broadly fall into protection scope of the present invention.
It should be noted that in describing the invention, term " first ", " second " only for descriptive purposes, and it is not intended that instruction or hint relative importance.As long as just can be combined with each other additionally, technical characteristic involved in invention described below difference embodiment does not constitute conflict each other.
Embodiment
The present embodiment provides a kind of Arc-extinguishing Devices of DC Circuit Breakers, as shown in Fig. 1-6 and 9, including: the first housing 1；Second housing 2, relative with described first housing 1 and be secured to connect, to form internally installed space 10；Arc-chutes 3, are arranged on described second housing 2 and are positioned at described installing space 10 inside, having the side opening 30 relative with described first housing 1；Aerogenesis cover 4, it is arranged on the lower inside of described arc-chutes 3, including the first aerogenesis plate 41 and the second aerogenesis plate 42 being oppositely arranged, and connect described first aerogenesis plate 41 and described second aerogenesis plate 42 to form the shutter 43 holding space 40, described shutter 43 is relative with described side opening 30 and arranges near described second housing 2, and described first aerogenesis plate the 41, second aerogenesis plate 42 and described shutter 43 are aerogenesis material；Dynamic and static contact 5,6, is arranged on described installing space 10 internal, and it is internal that disjunction place of described dynamic and static contact 5,6 is positioned at described accommodation space 40, and near described shutter 43；Arc extinguishing grid pieces 7, there are several, being arranged on the inner upper of described arc-chutes 3, have the lower openings 71 relative with described accommodation space 40, the openings of sizes of described lower openings 71 is gradually reduced (as shown in Figure 10) along described second housing 2 to described first housing 1 direction.
When dynamic and static contact 5,6 disjunction produces electric arc, first aerogenesis plate the 41, second aerogenesis plate 42 and shutter 43 are triggered by the electric arc of high temperature, produce a large amount of gas, gas push electric arc moves away from the direction of shutter 43, electric arc is in the process of movement, the aerogenesis plate 41,42 of both sides is constantly heated aerogenesis, blows electric arc accelerated motion obliquely upward；Several arc extinguishing grid pieces 7 being arranged on arc-chutes 3 inner upper are provided with lower openings 71 towards the side holding space 40, and pilot arc enters the gap between arc extinguishing grid pieces 7, and electric arc is lowered the temperature so that it is extinguish；Owing to the size of lower openings 71 is gradually reduced along the direction of the second housing 2 to the first housing 1, electric arc is in the process of movement, constantly it is subject to the stop of the less arc extinguishing grid pieces of lower openings 71 7, make it can not go out from the side opening 30 of arc-chutes 3, can only enter the space between arc extinguishing grid pieces 7, utilize most arc extinguishing grid pieces 7 to lower the temperature, promote it to extinguish as early as possible；Shutter 43 can not only prevent electric arc from going out arc-chutes 3, also enclose, with first aerogenesis plate the 41, second aerogenesis plate 42, the accommodation space 40 defining a relative closure, after excited generation gas by the high temperature of electric arc, increase gas pressure, it is possible to blow electric arc accelerated motion；Compared with prior art, the Arc-extinguishing Devices of DC Circuit Breakers of the present embodiment, the first housing 1 can not only be protected not by avulsion, moreover it is possible to make full use of most arc extinguishing grid pieces 7 and improve arc quenching effect.
As Figure 2-3, described first housing 1 is provided with first extension plate 11 relative with described first aerogenesis plate 41, and second extension plate 12 relative with described second aerogenesis plate 42, it is internal that described first extension plate 11 and the second extension plate 12 stretch into described arc-chutes 3, is formed and connects and clearance space 13 opposing upper and lower with described arc extinguishing grid pieces 7 with described accommodation space 40.The clearance space 13 that first extension plate 11 is formed with the second extension plate 12 connects with holding space 40, increases the horizontal movement scope of electric arc, provides space for weakening arc energy further.
As shown in Figure 6, described first aerogenesis plate 41 and described second aerogenesis plate 42 be arranged in parallel, and the medial surface of described first aerogenesis plate 41 and described second aerogenesis plate 42 is formed with some towards the raised plate 44 extended each other, forming groove 45 between two raised plate 44 of arbitrary neighborhood, the development length of described raised plate 44 is gradually increased along the direction away from described arc extinguishing grid pieces 7.Electric arc produces and after being blown by gas, the raised plate 44 that aerogenesis plate 41,42 is arranged and groove 45, it is possible to increase the area of electric arc and aerogenesis plate 41,42 contact, advantageously reduces the temperature of electric arc, and is conducive to producing more substantial gas and blows electric arc and move upward；The development length of raised plate 44 is gradually increased along the direction away from arc extinguishing grid pieces 7, it is possible to stop that electric arc moves downward, it is prevented that electric arc goes out downwards arc-chutes 3.
Described first extension plate 11 and described second extension plate 12 are obliquely installed, and form the described clearance space 13 that the big under shed of upper shed is little.Being in that of the benefit so arranged, clearance space 13 can coordinate with aerogenesis cover 4, plays pilot arc and is upwardly into arc extinguishing grid pieces 7, and prevents electric arc from going out downwards the effect of arc-chutes 3.
Described lower openings 71 is circular arc opening.The opening of circular arc can attract electric arc to enter the gap between arc extinguishing grid pieces 7 better.
As shown in fig. 6-7, described arc-chutes 3 include the first dividing plate 31 and the second partition 32 installed in described installing space 10, and described first dividing plate 31 and described second partition 32 are oppositely arranged to form the space for installing described aerogenesis cover 4 and described arc extinguishing grid pieces 7.
Described first aerogenesis plate 41 is parallel relative with described first dividing plate 31, and described second aerogenesis plate 42 is parallel relative with described second partition 32；The two opposite side walls of described arc extinguishing grid pieces 7 is separately fixed on described first dividing plate 31 and described second partition 32, and lays respectively between described first aerogenesis plate 41 and described first dividing plate 31, and between described second aerogenesis plate 42 and described second partition 32.
As shown in Fig. 6,7,11 and 12, also include labyrinth arc extinguishing structure 8 (in the present embodiment, labyrinth arc extinguishing structure is formed by two parts docking, one can also be arranged to), it is internal that described labyrinth arc extinguishing structure 8 is arranged on described installing space 10, and there is labyrinth channel 85, the one end open of described labyrinth channel 85 is relative to described arc extinguishing grid pieces 7 to receive the electric arc not being off, other end opening and atmosphere.The effect of labyrinth channel 85 is in that to receive the electric arc extinguished not yet after arc extinguishing grid pieces 7, and it is further lowered the temperature so that it is extinguish；Labyrinth channel 85 not only increases the movement length of electric arc, and the motion returning electric arc causes resistance so that the time that electric arc retains in labyrinth channel 85 is longer, it is possible to lower the temperature more fully, is beneficial to the extinguishing of electric arc.
As shown in Figure 4, described labyrinth arc extinguishing structure 8 is formed with described first housing the 1, second housing 2 and seals space 80, the other end opening of described labyrinth channel 85 connects with described sealing space 80, and described first housing 1 and/or described second housing 2 are provided with the air vent 14 connected with described sealing space 80.
Concrete, described labyrinth arc extinguishing structure 8 includes: side installing plate 84, is two and is oppositely arranged；First flat board 81, being at least two-layer, each layer all has several, and the two ends of each are fixed on the inwall of two described side installing plates 84, and described in any two of same layer, between the first flat board 81, forming the first gap 811, described first flat board about 81 being positioned on different layers is relative；Starting stave 83, is at least one layer, and each layer all has several, and the two ends up and down of each are connected with two described first flat boards 81 opposing upper and lower respectively；Second flat board 82, one end is fixed on described starting stave 83, the other end extends towards another second riser 83 close with described starting stave 83, and form the second gap 821 with the second riser 83 another described, two described first gaps 811 opposing upper and lower are blocked by described second flat board 82, and several described first gaps 811 and several described second gaps 821 form described labyrinth channel 85.
As shown in figure 13, described static contact 6 has the first extension 61, and described moving contact 5 has the second extension 51, and when the contact of described dynamic and static contact 5,6 connects, described first extension 51 is substantially parallel with described second extension 61, and energising after current is in opposite direction.When after energising, the magnetic direction that first extension 61 and the second extension 51 position between the first extension 61 and the second extension 51 produces is identical, when dynamic and static contact 5,6 disjunction, this magnetic field can drive moving contact 5 faster away from static contact 6, so that the disjunction change of dynamic/static contact is easy.
As shown in figs 6-8, it is outside that described first extension 61 is positioned at described accommodation space 40, and substantially parallel with described shutter 43；Described first extension 61 has stationary contact 60, relative with described stationary contact 60 offers stationary contact through hole 46 on described shutter 43, and the movable contact being positioned at the described moving contact 5 within described accommodation space 40 contacts connection by described stationary contact through hole 46 with described stationary contact 60.This setup can make the close shutter 43 that the breakpoint of dynamic/static contact 5,6 is near as far as possible, dynamic/static contact 5, the electric arc produced after 6 disjunctions can affect two aerogenesis plates 41 simultaneously, 42 and shutter 43, thus producing rapidly a large amount of gas, promote electric arc to move rapidly.
Described static contact 6 includes the first extension 61, the 3rd extension 63 being oppositely arranged with described first extension 61, connect described first extension 61 bottom and the first connecting portion 62 of described 3rd extension 63 bottom, it is connected with the top of described 3rd extension 63 and second connecting portion 64 horizontal-extending towards described first extension 61 direction, and the wire connecting portion 65 being connected with described second connecting portion 64.This kind of set-up mode so that the first extension 61 is substantially parallel with shutter 43 such that it is able to conveniently realize the second extension 51 with moving contact 5 and parallel, and then realize the easier disjunction of dynamic/static contact 5,6；First connecting portion 62, the 3rd extension 63, the set-up mode of the second connecting portion 64 and wire connecting portion 65, it is possible to save space, make equipment entirety more compact, and be reasonably scheduled that wiring position.
Also include protection board 9; described protection board 9 has the first protection board 91 between described first extension 61 and described 3rd extension 63; and being connected with described first protection board 91, and the second protection board 92 between described second connecting portion 64 and described arc extinguishing grid pieces 7.First protection board 91 can protect the first extension 61 to be only connected with the 3rd extension 63 by the first connecting portion 62, it is ensured that the sense of current on the first extension 61 and the sense of current on the second extension 51 are contrary；Second protection board 92 can prevent from electric arc from scurrying out from the gap position of arc extinguishing grid pieces 7 contacting with static contact 6, it is ensured that safety.
Described protection board 9 is fixed on described aerogenesis cover 4 by attachment structure.Described first aerogenesis plate 41 has from outward extending first extension 411 of described shutter 43, described second aerogenesis plate 42 has from outward extending second extension 421 of described shutter 43, and the part lower end closed of the close described shutter 43 of described aerogenesis cover 4 also extends outward the 3rd extension 431 from described shutter 43；Described first extension 411 is provided with the first grab 412; described second extension 421 is provided with the second grab 422; described first protection board 91 is provided with coordinating with described first grab 421 first card interface 911 of clamping, and coordinates the second card interface 912 of clamping with described second grab 422；The space 432 for holding described first connecting portion 62 is formed between described first protection board 91 and described 3rd extension 431.
Several described arc extinguishing grid pieces 7 relative with described second protection board 92, the lower openings 71 that it is arranged is gradually reduced along the direction opening near described static contact 6, and last described arc extinguishing grid pieces 7 is not provided with described lower openings 71.Such structural design, it is possible to stop that electric arc enters as much as possible and be positioned at arc extinguishing grid pieces 7 below the second protection board 92, and then avoid electric arc to go out from this position contacting with static contact 6, it is ensured that safety.
Obviously, above-described embodiment is only for clearly demonstrating example, and is not the restriction to embodiment.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 cannot all of embodiment be given exhaustive.And the apparent change thus extended out or variation are still among the protection domain of the invention.
Claims (10)
1. an Arc-extinguishing Devices of DC Circuit Breakers, it is characterised in that: including:
First housing (1)；
Second housing (2), relative with described first housing (1) and be secured to connect, to form internally installed space (10)；
Arc-chutes (3), are arranged on described second housing (2) and above and are positioned at described installing space (10) inside, have the side opening (30) relative with described first housing (1)；
Aerogenesis cover (4), it is arranged on the lower inside of described arc-chutes (3), including the first aerogenesis plate (41) being oppositely arranged and the second aerogenesis plate (42), and connect described first aerogenesis plate (41) and described second aerogenesis plate (42) to form the shutter (43) holding space (40), described shutter (43) is relative with described side opening (30) and arranges near described second housing (2), and described first aerogenesis plate (41), the second aerogenesis plate (42) and described shutter (43) are aerogenesis material；
Dynamic and static contact (5,6), is arranged on described installing space (10) internal, and it is internal that disjunction place of described dynamic and static contact (5,6) is positioned at described accommodation space (40), and near described shutter (43)；
Arc extinguishing grid pieces (7), there are several, it is arranged on the inner upper of described arc-chutes (3), having the lower openings (71) relative with described accommodation space (40), the openings of sizes of described lower openings (71) is gradually reduced along described second housing (2) to described first housing (1) direction.
2. Arc-extinguishing Devices of DC Circuit Breakers according to claim 1, it is characterized in that: described first housing (1) is provided with first extension plate (11) relative with described first aerogenesis plate (41), and second extension plate (12) relative with described second aerogenesis plate (42), it is internal that described first extension plate (11) and the second extension plate (12) stretch into described arc-chutes (3), formed connect with described accommodation space (40) and with described arc extinguishing grid pieces (7) clearance space opposing upper and lower (13).
3. Arc-extinguishing Devices of DC Circuit Breakers according to claim 2, it is characterized in that: described first aerogenesis plate (41) and described second aerogenesis plate (42) be arranged in parallel, and the medial surface of described first aerogenesis plate (41) and described second aerogenesis plate (42) is formed with some towards the raised plate extended each other (44), forming groove (45) between two raised plate (44) of arbitrary neighborhood, the development length of described raised plate (44) is gradually increased along the direction away from described arc extinguishing grid pieces (7).
4. the Arc-extinguishing Devices of DC Circuit Breakers according to Claims 2 or 3, it is characterized in that: described first extension plate (11) and described second extension plate (12) are obliquely installed, form the described clearance space (13) that the big under shed of upper shed is little.
5. Arc-extinguishing Devices of DC Circuit Breakers according to claim 1, it is characterised in that: described lower openings (71) is circular arc opening.
6. the Arc-extinguishing Devices of DC Circuit Breakers according to any one of claim 1-5, it is characterized in that: described arc-chutes (3) include in described installing space (10) install the first dividing plate (31) and second partition (32), described first dividing plate (31) and described second partition (32) be oppositely arranged with formation for installing described aerogenesis cover (4) and the space of described arc extinguishing grid pieces (7).
7. Arc-extinguishing Devices of DC Circuit Breakers according to claim 6, it is characterized in that: described first aerogenesis plate (41) is parallel relative with described first dividing plate (31), described second aerogenesis plate (42) is parallel relative with described second partition (32)；The two opposite side walls of described arc extinguishing grid pieces (7) is separately fixed on described first dividing plate (31) and described second partition (32), and lay respectively between described first aerogenesis plate (41) and described first dividing plate (31), and between described second aerogenesis plate (42) and described second partition (32).
8. the Arc-extinguishing Devices of DC Circuit Breakers according to any one of claim 1-7, it is characterized in that: also include labyrinth arc extinguishing structure (8), it is internal that described labyrinth arc extinguishing structure (8) is arranged on described installing space (10), and there is labyrinth channel (85), the one end open of described labyrinth channel (85) electric arc that with reception is not off relative to described arc extinguishing grid pieces (7), other end opening and atmosphere.
9. Arc-extinguishing Devices of DC Circuit Breakers according to claim 8, it is characterized in that: described labyrinth arc extinguishing structure (8) is formed with described first housing (1), the second housing (2) and seals space (80), the other end opening of described labyrinth channel (85) connects with described sealing space (80), and described first housing (1) and/or described second housing (2) are provided with the air vent (14) connected with described sealing space (80).
10. Arc-extinguishing Devices of DC Circuit Breakers according to claim 9, it is characterised in that: described labyrinth arc extinguishing structure (8) including:
Side installing plate (84) is two and is oppositely arranged；
First flat board (81), it is at least two-layer, each layer all has several, the two ends of each are fixed on the inwall of two described sides installing plate (84), and described in any two of same layer, between the first flat board (81), forming the first gap (811), described first flat board (81) being positioned on different layers is relative up and down；
Starting stave (83), is at least one layer, and each layer all has several, and the two ends up and down of each are connected with two described first flat boards (81) opposing upper and lower respectively；
Second flat board (82), one end is fixed on described starting stave (83), the other end extends towards another second riser (83) close with described starting stave (83), and form the second gap (821) with the second riser (83) another described, two described first gaps (811) opposing upper and lower are blocked by described second flat board (82), and several described first gaps (811) and several described second gaps (821) form described labyrinth channel (85).
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| CN201610326520.0A CN105788986B (en) | 2016-05-17 | 2016-05-17 | A kind of Arc-extinguishing Devices of DC Circuit Breakers |
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