CN104485267A - Contact arc extinguishing device for low voltage circuit breaker - Google Patents
Contact arc extinguishing device for low voltage circuit breaker Download PDFInfo
- Publication number
- CN104485267A CN104485267A CN201410798379.5A CN201410798379A CN104485267A CN 104485267 A CN104485267 A CN 104485267A CN 201410798379 A CN201410798379 A CN 201410798379A CN 104485267 A CN104485267 A CN 104485267A
- Authority
- CN
- China
- Prior art keywords
- arc
- insulating cover
- slide rail
- arc extinguishing
- cover wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a contact arc extinguishing device for a low voltage circuit breaker. The contact arc extinguishing device comprises an arc extinguishing grid piece group, a contact system, a first arc striking sliding rail, a second arc striking sliding rail and an arc insulating shield, wherein the contact system comprises a moving contact and a static contact which are in a pair; the first arc striking sliding rail and the second arc striking sliding rail vertically correspond to each other; the an arc insulating shield comprises a first arc insulating shield wall and a second arc insulating shield wall. The contact arc extinguishing device is characterized in that a first circular-arc cylindrical surface is formed on the first arc insulating shield wall, and a second circular-arc cylindrical surface is formed on the second arc insulating shield wall; a narrowing throat channel is formed in an arc moving channel through the first circular-arc cylindrical surface and the second circular-arc cylindrical surface; the width of a first throat channel opening of the throat channel is gradually enlarged in the direction of the contact system, so that the first throat channel opening forms a horn mouth shape; the width of a second throat channel opening is gradually enlarged toward the arc extinguishing grid piece group, so that the second throat channel opening forms a horn mouth shape. The contact arc extinguishing device brings convenience for the arc to quickly enter the arc extinguishing grid piece group and is cut by the arc extinguishing grid piece group, the air blowing effect of sudden ascension of arc voltage is obtained, the breaking performance is enhanced, and the contact arc extinguishing device conforms to the development trend of miniaturization.
Description
Technical field
The invention belongs to low voltage electrical apparatus technology field, be specifically related to a kind of contact arc extinguishing device of low-voltage circuit breaker.
Background technology
The function of low-voltage circuit breaker cut-offs (cut-out) fault current, and the core component cut-offfing fault current is contact arc extinguishing device, contact arc extinguishing device is the general name of contact system and arc quenching system, and that is contact arc extinguishing device comprises contact system and arc quenching system.Contact system comprises custom and is called the moving contact of movable connector and is accustomed to being called the fixed contact of fixed contact therefor; Contact system comprises arc control device and the arc extinguishing grid pieces for forming arc control device.When disjunction fault current, moving contact is scolded out relative to fixed contact, the process held is scolded to produce electric arc at moving contact relative to fixed contact, electric arc enters in arc control device through Pao Hu road (also citing approvingly arc road), split and cool and use medium recovery strength after raising arc voltage and arc by the arc extinguishing grid pieces (also claim metal grid) in arc control device to electric arc.It can thus be appreciated that, electric arc be made between right contact (dynamic and static contact) produce after behind the region between the region at the place of dynamic and static contact and the arc extinguishing grid pieces leg of arc extinguishing grid pieces, just need can enter arc extinguishing grid pieces, that is electric arc from produce to arrive arc extinguishing grid pieces there is a transfer process.From current limliting principle, the speed of arc transfer speed can have a direct impact current limitation effect, and specifically, arc transfer speed is faster more favourable to lifting break performance, and vice versa.
In order to improve the ability of low-voltage circuit breaker disjunction fault current, prior art is started with from the structure optimizing contact galvanic circle and formation arc extinguishing grid pieces usually, being intended to improve the magnetic blow-out power that acts on electric arc and using impels electric arc to shift to arc extinguishing grid pieces, or increases air-blowing power by the width of compression arc branch space and use and impel electric arc to shift to arc control device grid.But because this design concept compresses leeway based on the volume existence of low-voltage circuit breaker and contact arc extinguishing device thereof, thus today that breaking capacity improves constantly is expected at low-voltage circuit breaker and contact arc extinguishing device small thereof, previous designs theory cannot play a role, so, in limited space, how optimize contact arc extinguishing device further also obtain the hot technology that the break performance met the demands become industry to pay close attention to, especially, under the component number object prerequisite not increasing contact arc extinguishing device, how to obtain more preferably break performance has become industry urgently to expect the technical problem solved.
In disclosed Chinese patent literature, the technical information of the contact arc extinguishing device about low-voltage circuit breaker can be seen in, as CN2924777Y recommends to have " for the arc control device of miniature circuit breaker, arc quenching system and miniature circuit breaker ", the structure of this patent to each arc extinguishing grid pieces forming arc control device has done improvement, arc extinguishing grid pieces (patent claims metal grid) is formed the recess of " entering " font of Chinese character, improve the elongation ability to electric arc by this recess entering font, finally improve arc extinction performance.And for example CN201219073Y provides " arc striking/extinguishing mechanism of miniature circuit breaker ", and this patent formula is directly connected with the run-on tab being used for pilot arc by arc extinguishing board and is bent into ∧ font, extinguishes in order to electric arc fast moving.For another example CN102157312B discloses has " arc-control device of miniature circuit breaker ", this patent formula uses by arranging insulating arthropleura respectively in the both sides of a run-on tab (patent claims the first run-on tab) to expand arc control device space, enhancing Pao Hu road magnetic field intensity, finally improves breaking capacity.
Typical disclosed in CN203260541U " a kind of arc-extinguishing chamber device of circuit breaker ", this patent formula is formed with the boss matched with arc striking piece on the arc surface of arc insulating cover, avoids a pair wall body of arc insulating cover to be out of shape by boss and coordinating of arc striking piece.
Although the patent formula being not limited to exemplify above has unique technique effect separately, but there is electric arc rotary speed logical fraud slowly, because these patent formula all do not possess accelerate electric arc from voltage contact area to the ability of arc extinguishing grid pieces region fast transfer, that is do not produce the air-blowing effect that electric arc is strengthened in the process shifted to arc extinguishing grid pieces region from voltage contact area at electric arc, the connecting-disconnecting function of circuit breaker cannot be promoted.
For above-mentioned prior art, be necessary to be improved, for this reason, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
Task of the present invention is to provide a kind of and under the prerequisite without the need to increasing structural member, contributes to obtaining the air-blowing effect that strengthens electric arc and use and accelerate electric arc from voltage contact area to the speed of arc extinguishing grid pieces zone-transfer and the final contact arc extinguishing device improving the low-voltage circuit breaker of break performance.
Task of the present invention has been come like this, a kind of contact arc extinguishing device of low-voltage circuit breaker, comprise arc extinguishing grid pieces group, contact system, first, second striking slide rail and arc insulating cover, described contact system comprises a pair and closes with the use of realizing circuit breaker the moving contact and fixed contact that divide, first striking slide rail and the second striking slide rail are arranged with the state of self correspondence, first described striking slide rail one end extends to arc extinguishing grid pieces group, the other end is connected with fixed contact, second described striking slide rail one end extends to arc extinguishing grid pieces group, the other end extends to the region at described contact system place and corresponding with described moving contact, described arc insulating cover comprises face-to-face and separates the first arc insulating cover wall and the second arc insulating cover wall of a determining deviation setting, and first, second arc insulating cover wall and first, second striking slide rail complements each other to form the electric arc movable passageway having one end connection contact system and be connected arc extinguishing grid pieces group with the other end, feature is: on the first described arc insulating cover wall, be configured with one towards the first circular arc cylinder of the direction bulging of described second arc insulating cover wall, and one is configured with towards the second circular arc cylinder of the direction bulging of the first arc insulating cover wall on the second arc insulating cover wall and corresponding to the position of the first circular arc cylinder, by first, second circular arc cylinder and form the laryngeal inlet of a narrow contracting in described electric arc movable passageway, the width of the first laryngeal inlet mouth of this laryngeal inlet expands gradually towards the direction of described contact system and forms bell-mouthed shape, and the width of the second laryngeal inlet mouth of laryngeal inlet expands gradually towards the direction of described arc extinguishing grid pieces group and forms bell-mouthed shape equally.
In a specific embodiment of the present invention, the distance between the first laryngeal inlet mouth of described laryngeal inlet to described arc extinguishing grid pieces group is less than from described second laryngeal inlet mouth to the distance between the region at described contact system place.
In another specific embodiment of the present invention, between first, second described arc insulating cover wall and in the position of bottom corresponding to described electric arc movable passageway, be configured with one for by arc insulating cover wall connecting plate as a whole for first, second arc insulating cover wall formation connected to each other.
In another specific embodiment of the present invention, at the length direction of described arc insulating cover wall connecting plate and the side towards described electric arc movable passageway is configured with striking slide rail support lug with space state, the second described striking slide rail is bearing in striking slide rail support lug.
In another specific embodiment of the present invention, described arc insulating cover the first arc insulating cover wall towards described second arc insulating cover wall side and be positioned at described electric arc movable passageway and be configured with one towards the bottom of one end of described arc extinguishing grid pieces group for what limit described second striking slide rail and first limit flange, be configured with one at the second arc insulating cover wall and second limit flange towards the side of the first arc insulating cover wall and corresponding to the first position limiting flange equally for limiting the second striking slide rail.
More of the present invention and in a specific embodiment, one first slide rail mating cavity is configured with towards the upper surface of one end of described arc extinguishing grid pieces group at the first described arc insulating cover wall, one second slide rail mating cavity is configured with towards the upper surface of one end of arc extinguishing grid pieces group and corresponding to the position of the first slide rail mating cavity equally at described second arc insulating cover wall, the position of the first described circular arc cylinder on described first arc insulating cover wall is corresponding with the region of the first slide rail mating cavity, the position of the second described circular arc cylinder on described second arc insulating cover wall is corresponding with the region of the second slide rail mating cavity, the first described striking slide rail matches with the first slide rail mating cavity and the second slide rail mating cavity simultaneously.
In an of the present invention and then specific embodiment, be embedded with a magnetic conduction sheet back to the side of the second arc insulating cover wall and at the second arc insulating cover wall back to each the inserting in side of the first arc insulating cover wall at the first described arc insulating cover wall.
In an again of the present invention and then specific embodiment, to expand towards one end of described arc extinguishing grid pieces group at the first described striking slide rail and establish and be configured with the first run-on tab, described second striking slide rail towards arc extinguishing grid pieces group one end expand be provided with the second run-on tab, this first, second run-on tab is all positioned at outside described electric arc movable passageway, and the first run-on tab corresponds to the top of described arc extinguishing grid pieces group, and the second run-on tab correspondence should in the bottom of arc extinguishing grid pieces group.
Technical scheme provided by the invention owing to being configured with the first circular arc cylinder on the first arc insulating cover wall of arc insulating cover, and be wall is configured with the second circular arc cylinder at the second arc four, thus by first, second circular arc cylinder forms the laryngeal inlet of a narrow contracting in electric arc movable passageway, so flow velocity can enlarge markedly when electric arc and high temperature gas flow are by way of laryngeal inlet, extremely be conducive to electric arc to accelerate enter arc extinguishing grid pieces group and cut by arc extinguishing grid pieces group, obtain the air-blowing effect that arc voltage promotes suddenly, the interrupting performance of low-voltage circuit breaker is significantly strengthened, and due to the present invention relative to prior art without the need to increasing any parts, thus circuit breaker and arc-control device thereof the trend to miniaturization can be complied with.
Accompanying drawing explanation
Fig. 1 is the structure chart of the contact arc extinguishing device of this low-voltage circuit breaker.
Fig. 2 is the detailed structure view of the arc insulating cover shown in Fig. 1.
The schematic diagram of the electric arc movable passageway that Fig. 3 is the arc insulating cover shown in Fig. 2.
Fig. 4 is the side schematic view of Fig. 1.
The schematic diagram that Fig. 5 matches with arc extinguishing grid pieces group for first, second run-on tab shown in Fig. 1, Fig. 2 and Fig. 4.
Fig. 6 is the schematic diagram of the arc extinguishing grid pieces shown in Fig. 1, Fig. 4 and Fig. 5.
Embodiment
In order to enable the auditor of Patent Office especially the public clearly understand technical spirit of the present invention and beneficial effect, applicant will elaborate below by way of example, but be not all the restriction to the present invention program to the description of embodiment, any conceive according to the present invention done be only pro forma but not substantial equivalent transformation and all should be considered as technical scheme category of the present invention.
Everyly in the following description relate to upper and lower, left and right, the concept of directivity (or claim directionality) of front and rear is all for the location status residing for the figure be described, object is to facilitate public understanding, thus can not be understood as being particularly limited to technical scheme provided by the invention.
Refer to Fig. 1, give the circuit breaker base 1 of the structural system belonging to low-voltage circuit breaker in FIG, this circuit breaker base 1 is insulating part, more precisely be a working of plastics, this circuit breaker base 1 can be the pedestal of circuit breaker, also can be the base of the one pole modular unit be arranged in pedestal, in the present embodiment, the preferably base of one pole modular unit, this circuit breaker base 1 is positioned at both sides and is respectively configured with an arc extinguishing chamber 11.The electric power incoming line joint pin 13(that also show the one end (diagram right-hand member) being fixed on circuit breaker base 1 in FIG also can claim electric power incoming line connecting plate), the power outlet joint pin 14(of the other end that is fixed on circuit breaker base 1 also can claim power outlet connecting plate) and show the magnetictrip 15 on the top being arranged on circuit breaker base 1.Because the above-mentioned parts be arranged on circuit breaker base 1 belongs to known technology, such as can see CN203260541U and CN102157312B mentioned in the superincumbent background technology hurdle of applicant, etc., thus applicant repeats no more.
Refer to Fig. 2 to Fig. 4 and composition graphs 1, give the arc extinguishing grid pieces group 2 of the structural system belonging to contact arc extinguishing device of the present invention, contact system 3, first, second striking slide rail 4, 5 and arc insulating cover 6, the position that arc extinguishing grid pieces group 2 is corresponding to aforementioned arc extinguishing chamber 11 is arranged on aforementioned circuit breaker base 1, this arc extinguishing grid pieces group 2 by plural number piece structure identical and formed with the arc extinguishing grid pieces 21 that the state be spaced is stacked, each arc extinguishing grid pieces 21 is extended with a pair arc extinguishing grid pieces leg 211 towards one end of described contact system 3 with the state corresponded to each other, this is configured to the arc extinguishing grid pieces passage (Fig. 6 shows) for electric arc movement to the space 2111 between arc extinguishing grid pieces leg 211, contact system 3 comprises moving contact 31 and fixed contact 32, this moves, fixed contact 31, 32 are arranged on circuit breaker base 1, and with the use of realizing circuit breaker conjunction point, first striking slide rail 4 and the second striking slide rail 5 are arranged with the state of self correspondence, first described striking slide rail 4 one end extends to arc extinguishing grid pieces group 2, preferably, extend to the top of arc extinguishing grid pieces group 2 and parallel with arc extinguishing grid pieces 21, the other end is connected with fixed contact 32, second described striking slide rail 5 one end extends to arc extinguishing grid pieces group 2, preferably, extend to the bottom of arc extinguishing grid pieces group 2 and parallel with arc extinguishing grid pieces 21, the region that the other end extends to described contact system 3 place is corresponding with described moving contact 31, arc insulating cover 6 is arranged on circuit breaker base 1 in the position (i.e. the position of the right-hand member of location status shown in Fig. 1 and Fig. 4) on the right side corresponding to arc extinguishing grid pieces group 2, described arc insulating cover 6 face-to-face and separate the first arc insulating cover wall 61 and the second arc insulating cover wall 62 that a determining deviation arranges, and first, second arc insulating cover wall 61, 62 and first, second striking slide rail 4, 5 complement each other to form the electric arc movable passageway 63 having one end connection contact system 3 and be connected arc extinguishing grid pieces group 2 with the other end, first striking slide rail 4 and the second striking slide rail 5 are positioned at electric arc movable passageway 63 with the state of self correspondence.Also show the arc extinguishing grid pieces support 212 for fixing arc extinguishing grid pieces 21 in FIG.
Please emphasis see Fig. 2 and Fig. 3, technical essential as technical scheme provided by the invention: be configured with one towards the first circular arc cylinder 611 of the direction bulging of described second arc insulating cover wall 62 on aforesaid first arc insulating cover wall 61, and one is configured with towards the second circular arc cylinder 621 of the direction bulging of the first arc insulating cover wall 61 on the second arc insulating cover wall 62 and corresponding to the position of the first circular arc cylinder 611, by first, second circular arc cylinder 611, the laryngeal inlet 631 of 621 formation one narrow contractings in aforesaid electric arc movable passageway 63, the width of the first laryngeal inlet mouth 6311 of this laryngeal inlet 631 expands gradually towards the direction of described contact system 3 and forms bell-mouthed shape, and the width of the second laryngeal inlet mouth 6312 of laryngeal inlet 631 expands gradually towards the direction of described arc extinguishing grid pieces group 2 and forms bell-mouthed shape equally.
Preferably, be less than from aforementioned second laryngeal inlet mouth 6312 to the distance between the region at described contact system 3 place from the first laryngeal inlet mouth 6311 to the distance between aforementioned arc extinguishing grid pieces leg 211 of aforesaid laryngeal inlet 631.That is the relative side being more partial to arc extinguishing grid pieces group 2 of the narrowest between voltage contact area with arc extinguishing grid pieces group 2 throat.
Fig. 3 shows has to the extension of contact system 3 region the subtended angle gradually opened from the narrowest position of the narrowest throat AB and laryngeal inlet 631, extends the subtended angle having equally and gradually open to arc extinguishing grid pieces group 2.
Shown in Fig. 1 and Fig. 4, between first, second arc insulating cover wall 61,62 aforesaid and in the position of bottom corresponding to aforementioned arc movable passageway 63, be configured with one for by arc insulating cover wall connecting plate 64 as a whole for first, second arc insulating cover wall 61,62 formation connected to each other.
Preferably, at the length direction of aforementioned arc insulating cover wall connecting plate 64 and the side towards aforementioned arc movable passageway 63 is configured with striking slide rail support lug 641 with space state, aforesaid second striking slide rail 5 is bearing in striking slide rail support lug 641.And then, aforementioned arc insulating cover 6 the first arc insulating cover wall 61 towards described second arc insulating cover wall 62 side and be positioned at electric arc movable passageway 63 and be configured with one towards the bottom of one end of arc extinguishing grid pieces leg 211 for what limit the second striking slide rail 5 and first limit flange 612, be configured with one at the second arc insulating cover wall 62 and second limit flange 622 towards the side of the first arc insulating cover wall 61 and corresponding to the first position limiting flange 612 equally for limiting the second striking slide rail 5.
As shown in Figure 1, one first embedding chamber 613, location is configured with at the upper surface of the right-hand member of aforesaid first arc insulating cover wall 61, and the right-hand member of aforementioned second arc insulating cover wall 62 upper surface and locating corresponding position, embedding chamber 613 and be configured with one second with first and locate embedding chamber 623, aforesaid circuit breaker base 1 is respectively configured with a locating flange 12 in the position corresponding respectively to the first embedding chamber, location 613 and the second embedding chamber 623, location, locating flange 12 and first is located embedding chamber 613 and second and is located embedding chamber 623 and match, thus arc insulating cover 6 is arranged on circuit breaker base 1.
One first slide rail mating cavity 614 is configured with towards the upper surface of one end of described arc extinguishing grid pieces group 2 at aforesaid first arc insulating cover wall 61, equally be configured with one second slide rail mating cavity 624 towards the upper surface of one end of arc extinguishing grid pieces group 2 in the position corresponding to the first slide rail mating cavity 614 at aforementioned second arc insulating cover wall 62, the position of aforesaid first circular arc cylinder 611 on the first arc insulating cover wall 61 is corresponding with the region of the first slide rail mating cavity 614, equally, the position of aforesaid second circular arc cylinder 621 on described second arc insulating cover wall 62 is corresponding with the region of the second slide rail mating cavity 624, aforesaid first striking slide rail 4 matches with the first slide rail mating cavity 614 and the second slide rail mating cavity 624 simultaneously.
As shown in Figure 1, at aforesaid first arc insulating cover wall 61 back to the side of the second arc insulating cover wall 62 and back to the side of the first arc insulating cover wall 61, each inserting is embedded with a magnetic conduction sheet 65 at the second arc insulating cover wall 62.In fig. 2, applicant shows and is formed in the magnetic conduction sheet caulking groove 625 of the second arc insulating cover wall 62 back to the side of the first arc insulating cover wall 61, magnetic conduction sheet 65 and magnetic conduction sheet caulking groove 625 scarf.Although applicant is not shown be formed in the magnetic conduction sheet caulking groove of the first arc insulating cover wall 61 back to the second arc insulating cover wall 62 side, any puzzlement can't be produced to understanding.
Aforesaid first arc insulating cover wall 61 and the second arc insulating cover wall 62 are conflicted with a pair arc extinguishing grid pieces leg 211 respectively, as for the flow path of electric arc gentle stream flowing and space 2111(between electric arc movable passageway 63 and aforesaid arc extinguishing grid pieces leg 211 and arc extinguishing grid pieces passage) adjacent, specifically, if electric arc movable passageway 63 to be defined as the first flow path of electric arc and current flowing, and space 2111 is defined as the second flow path of electric arc and current flowing, so the first flow path and second flows pathway contiguous, and be less than the width of the second flow path to the uncovered width in arc extinguishing grid pieces leg 211 region by the first flow path of arc insulating cover 6 institute coated (i.e. encirclement) of shape substantially in U-shaped, formed from voltage contact area (dynamic thus, fixed contact 31, the region at 32 places) first increase progressively to going out between arc extinguishing grid pieces leg 211 region, the barometric gradient effect of then successively decreasing.
Refer to Fig. 5, to expand towards one end of aforementioned arc extinguishing grid pieces 21 at aforesaid first striking slide rail 4 and establish and be configured with the first run-on tab 41, described second striking slide rail 5 towards arc extinguishing grid pieces 21 one end expand be provided with the second run-on tab 51, this first, second run-on tab 41,51 is all positioned at outside aforementioned arc movable passageway 63, and the first run-on tab 41 corresponds to the top of described arc extinguishing grid pieces group 2, and the second run-on tab 51 correspondence should in the bottom of arc extinguishing grid pieces group 2.
Preferably, shown in Fig. 1, the chamber wall of aforementioned arc extinguishing chamber 11 is configured with arc extinguishing grid pieces caulking groove 111, aforesaid arc extinguishing grid pieces 21 and arc extinguishing grid pieces caulking groove 111 scarf.
When circuit breaker cut-offs fault current, produce electric arc between voltage contact area and supervene high temperature gas flow, electric arc and high temperature gas flow lead to the first striking slide rail 4, flow velocity when the most narrowed throat AB region of the electric arc movable passageway 63 of the arc insulating cover 6 of the second striking slide rail 5 and U-shaped and laryngeal inlet 631 is greatly enhanced, rise to velocity of sound can be accumulated by flow velocity during throat, after passing through narrow throat AB, subtended angle increases, air-flow instantaneous expansion discharges, flow velocity can supersonic speed, because this throat is closer to metal arc extinguishing grid pieces 21, arc extinguishing grid pieces group 2 can be arrived fast after electric arc and high temperature gas flow are by most narrow, be conducive to electric arc enter arc extinguishing grid pieces group 2 and cut by arc extinguishing grid pieces 21 fully, arc voltage fast lifting, realize strong current limiting effect.Therefore, electric arc is through the first striking slide rail 4, second striking slide rail 5, obviously can show and accelerate the translational speed of electric arc in electric arc shoe channel, quick arrival arc extinguishing grid pieces group 2 is also split by arc extinguishing grid pieces 21, and due to the narrowest throat AB compared to voltage contact area closer to arc extinguishing grid pieces 21, then after air-flow crosses narrow throat, the possibility of backward returning spray is also greatly diminished, the high temperature fluid that voltage contact area produces thus is crossed throat fast and is entered arc extinguishing grid pieces group 2 and be difficult to back spray, also voltage contact area cooling is conducive to, improve medium recovery strength, second breakdown arcing is avoided to cause disjunction failure.
It can thus be appreciated that, in this application, the arc insulating cover 6 of U-shaped forms the narrowest throat of spout and throat AB(also i.e. laryngeal inlet 631) between voltage contact area and arc extinguishing grid pieces 21, be relatively partial to the side of arc extinguishing grid pieces 21, be conducive to air-flow on the one hand to pass through spout at a high speed, before air-flow enters arc extinguishing grid pieces group 2, also there is acceleration effect on the other hand, be conducive to electric arc to accelerate enter arc extinguishing grid pieces group 2 and effectively cut, obtain the effect of arc voltage fast lifting, thus be conducive to the interrupting performance strengthening circuit breaker.
Claims (8)
1.
a kind of contact arc extinguishing device of low-voltage circuit breaker, comprise arc extinguishing grid pieces group (2), contact system (3), first, second striking slide rail (4, 5) and arc insulating cover (6), described contact system (3) comprises a pair and closes with the use of realizing circuit breaker the moving contact (31) and fixed contact (32) that divide, first striking slide rail (4) and the second striking slide rail (5) are arranged with the state of self correspondence, first described striking slide rail (4) one end extends to arc extinguishing grid pieces group (2), the other end is connected with fixed contact (32), second described striking slide rail (5) one end extends to arc extinguishing grid pieces group (2), the other end extends to the region at described contact system (3) place and corresponding with described moving contact (31), described arc insulating cover (6) comprises face-to-face and separates the first arc insulating cover wall (61) and the second arc insulating cover wall (62) of a determining deviation setting, and first, second arc insulating cover wall (61, 62) with first, second striking slide rail (4, 5) the electric arc movable passageway (63) that there is one end connection contact system (3) and be connected arc extinguishing grid pieces group (2) with the other end is complemented each other to form, it is characterized in that: on the first described arc insulating cover wall (61), be configured with one towards the first circular arc cylinder (611) of the direction bulging of described second arc insulating cover wall (62), and it is upper and be configured with one in the position corresponding to the first circular arc cylinder (611) towards the second circular arc cylinder (621) of the direction bulging of the first arc insulating cover wall (61) at the second arc insulating cover wall (62), by first, second circular arc cylinder (611, 621) in described electric arc movable passageway (63), form the laryngeal inlet (631) of a narrow contracting, the width of the first laryngeal inlet mouth (6311) of this laryngeal inlet (631) expands gradually towards the direction of described contact system (3) and forms bell-mouthed shape, and the width of the second laryngeal inlet mouth (6312) of laryngeal inlet (631) expands gradually towards the direction of described arc extinguishing grid pieces group (2) and forms bell-mouthed shape equally.
2.
the contact arc extinguishing device of low-voltage circuit breaker according to claim 1, the distance that it is characterized in that between the first laryngeal inlet mouth (6311) of described laryngeal inlet (631) to described arc extinguishing grid pieces group (2) is less than from described second laryngeal inlet mouth (6312) to the distance between the region at described contact system (3) place.
3.
the contact arc extinguishing device of low-voltage circuit breaker according to claim 1, to is characterized in that between described first, second arc insulating cover wall (61,62) and to be configured with one in the position of the bottom corresponding to described electric arc movable passageway (63) for by arc insulating cover wall connecting plate (64) as a whole for first, second arc insulating cover wall (61,62) formation connected to each other.
4.
the contact arc extinguishing device of low-voltage circuit breaker according to claim 3, it is characterized in that the length direction described arc insulating cover wall connecting plate (64) and the side towards described electric arc movable passageway (63) is configured with striking slide rail support lug (641) with space state, the second described striking slide rail (5) is bearing in striking slide rail support lug (641).
5.
the contact arc extinguishing device of low-voltage circuit breaker according to claim 1, it is characterized in that described arc insulating cover (6) the first arc insulating cover wall (61) towards described second arc insulating cover wall (62) side and be positioned at described electric arc movable passageway (63) and be configured with one towards the bottom of one end of described arc extinguishing grid pieces group (2) for what limit described second striking slide rail (5) and first limit flange (612), be configured with one at the second arc insulating cover wall (62) and second limit flange (622) towards the side of the first arc insulating cover wall (61) and corresponding to the first position limiting flange (612) equally for limiting the second striking slide rail (5).
6.
the contact arc extinguishing device of low-voltage circuit breaker according to claim 1, it is characterized in that being configured with one first slide rail mating cavity (614) at the first described arc insulating cover wall (61) towards the upper surface of one end of described arc extinguishing grid pieces group (2), equally be configured with one second slide rail mating cavity (624) towards the upper surface of one end of arc extinguishing grid pieces group (2) in the position corresponding to the first slide rail mating cavity (614) at described second arc insulating cover wall (62), the position of the first described circular arc cylinder (611) on described first arc insulating cover wall (61) is corresponding with the region of the first slide rail mating cavity (614), the position of the second described circular arc cylinder (621) on described second arc insulating cover wall (62) is corresponding with the region of the second slide rail mating cavity (624), the first described striking slide rail (4) matches with the first slide rail mating cavity (614) and the second slide rail mating cavity (624) simultaneously.
7.
the contact arc extinguishing device of the low-voltage circuit breaker according to the arbitrary claim of claim 1 or 3 or 5 or 6, is characterized in that at the first described arc insulating cover wall (61) back to the side of the second arc insulating cover wall (62) and back to the side of the first arc insulating cover wall (61), each inserting is embedded with a magnetic conduction sheet (65) at the second arc insulating cover wall (62).
8.
the contact arc extinguishing device of low-voltage circuit breaker according to claim 1, it is characterized in that expanding towards one end of described arc extinguishing grid pieces group (2) at the first described striking slide rail (4) establishing and being configured with the first run-on tab (41), described second striking slide rail (5) towards arc extinguishing grid pieces group (2) one end expand be provided with the second run-on tab (51), this is first years old, second run-on tab (41, 51) described electric arc movable passageway (63) is all positioned at outward, and the first run-on tab (41) is corresponding to the top of described arc extinguishing grid pieces group (2), and the second run-on tab (51) correspondence should in the bottom of arc extinguishing grid pieces group (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798379.5A CN104485267A (en) | 2014-12-19 | 2014-12-19 | Contact arc extinguishing device for low voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798379.5A CN104485267A (en) | 2014-12-19 | 2014-12-19 | Contact arc extinguishing device for low voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104485267A true CN104485267A (en) | 2015-04-01 |
Family
ID=52759804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410798379.5A Pending CN104485267A (en) | 2014-12-19 | 2014-12-19 | Contact arc extinguishing device for low voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104485267A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742136A (en) * | 2016-04-29 | 2016-07-06 | 浙江人民电器有限公司 | Miniature arc extinguishing structure of circuit breaker |
| CN110164724A (en) * | 2019-05-27 | 2019-08-23 | 浙江正泰电器股份有限公司 | Automatic transfer switching electric appliance |
| CN114050096A (en) * | 2021-11-11 | 2022-02-15 | 西安理工大学 | Miniature circuit breaker arc extinguishing system and have its miniature circuit breaker |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7022279U (en) * | 1970-06-13 | 1971-09-09 | Siemens Ag | Electric switch |
| DE68913403T2 (en) * | 1988-09-14 | 1994-09-01 | Asea Brown Boveri | Current limiter. |
| CN102201304A (en) * | 2011-05-25 | 2011-09-28 | 常熟开关制造有限公司(原常熟开关厂） | Curve runway structure of breaker |
| CN202042442U (en) * | 2011-05-16 | 2011-11-16 | 法泰电器（江苏）股份有限公司 | Arc initiating device of circuit breaker |
| CN102568944A (en) * | 2012-02-10 | 2012-07-11 | 上海巢安电气有限公司 | Small-sized circuit breaker |
| CN202534613U (en) * | 2012-04-01 | 2012-11-14 | 上海永继电气股份有限公司 | Transverse blowing arc extinguishing system of plastic casing breaker |
| CN203553076U (en) * | 2013-11-30 | 2014-04-16 | 德力西电气有限公司 | Breaker arc extinguishing apparatus |
| CN204011328U (en) * | 2014-07-31 | 2014-12-10 | 浙江天正电气股份有限公司 | A kind of miniature circuit breaker with magnetic conductive board |
| CN204271020U (en) * | 2014-12-19 | 2015-04-15 | 常熟开关制造有限公司(原常熟开关厂） | The contact arc extinguishing device of low-voltage circuit breaker |
-
2014
- 2014-12-19 CN CN201410798379.5A patent/CN104485267A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7022279U (en) * | 1970-06-13 | 1971-09-09 | Siemens Ag | Electric switch |
| DE68913403T2 (en) * | 1988-09-14 | 1994-09-01 | Asea Brown Boveri | Current limiter. |
| CN202042442U (en) * | 2011-05-16 | 2011-11-16 | 法泰电器（江苏）股份有限公司 | Arc initiating device of circuit breaker |
| CN102201304A (en) * | 2011-05-25 | 2011-09-28 | 常熟开关制造有限公司(原常熟开关厂） | Curve runway structure of breaker |
| CN102568944A (en) * | 2012-02-10 | 2012-07-11 | 上海巢安电气有限公司 | Small-sized circuit breaker |
| CN202534613U (en) * | 2012-04-01 | 2012-11-14 | 上海永继电气股份有限公司 | Transverse blowing arc extinguishing system of plastic casing breaker |
| CN203553076U (en) * | 2013-11-30 | 2014-04-16 | 德力西电气有限公司 | Breaker arc extinguishing apparatus |
| CN204011328U (en) * | 2014-07-31 | 2014-12-10 | 浙江天正电气股份有限公司 | A kind of miniature circuit breaker with magnetic conductive board |
| CN204271020U (en) * | 2014-12-19 | 2015-04-15 | 常熟开关制造有限公司(原常熟开关厂） | The contact arc extinguishing device of low-voltage circuit breaker |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742136A (en) * | 2016-04-29 | 2016-07-06 | 浙江人民电器有限公司 | Miniature arc extinguishing structure of circuit breaker |
| CN110164724A (en) * | 2019-05-27 | 2019-08-23 | 浙江正泰电器股份有限公司 | Automatic transfer switching electric appliance |
| CN110164724B (en) * | 2019-05-27 | 2024-02-23 | 浙江正泰电器股份有限公司 | Automatic change-over switch electric appliance |
| CN114050096A (en) * | 2021-11-11 | 2022-02-15 | 西安理工大学 | Miniature circuit breaker arc extinguishing system and have its miniature circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6253651B2 (en) | Single DC arc chute and bidirectional DC electrical switching device using the same | |
| US20090266793A1 (en) | Electrical switching appartatus, and arc chute and arc member therefor | |
| CN104485267A (en) | Contact arc extinguishing device for low voltage circuit breaker | |
| US9515464B2 (en) | Bus end arc interrupter | |
| CN204271020U (en) | The contact arc extinguishing device of low-voltage circuit breaker | |
| CN205282331U (en) | Low -voltage circuit breaker arc -Quenching system | |
| CN209896016U (en) | Contact arc extinguishing system of circuit breaker | |
| CN103794423B (en) | Air-sweeping type low-voltage arc eliminating device and chopper | |
| CN104517789B (en) | Circuit-breaker | |
| CN203260541U (en) | Circuit breaker arc distinguishing chamber device | |
| GB2536765A (en) | Circuit breaker | |
| CN218585914U (en) | Arc extinguishing device of circuit breaker | |
| CN107863282A (en) | The arc-chutes of breaker | |
| KR101701817B1 (en) | Gas isolated circuit breaker | |
| CN107293458B (en) | Small-sized circuit breaker | |
| CN207441641U (en) | The arc-chutes of breaker | |
| CN102013365A (en) | Arc control device of circuit breaker | |
| CN209526058U (en) | A kind of small-sized DC circuit breaker | |
| CN103021706B (en) | Electric switch device with electric arc isolating sleeve | |
| CN102270555B (en) | Arc-extinguishing chamber of low-voltage circuit breaker | |
| CN105719915B (en) | Arc chute for an electrical circuit breaker and circuit breaker comprising such an arc chute | |
| EP3370246B1 (en) | Circuit-breaker and baffle thereof | |
| CN204857637U (en) | Circuit breaker and gaseous guiding device thereof | |
| CN104576249B (en) | For the contact arc extinguishing device of low-voltage circuit breaker | |
| CN204375606U (en) | Breaker arc extinguishing mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150401 |