CN203882932U - Low-voltage breaker - Google Patents
Low-voltage breaker Download PDFInfo
- Publication number
- CN203882932U CN203882932U CN201420316353.8U CN201420316353U CN203882932U CN 203882932 U CN203882932 U CN 203882932U CN 201420316353 U CN201420316353 U CN 201420316353U CN 203882932 U CN203882932 U CN 203882932U
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- CN
- China
- Prior art keywords
- arc
- low
- housing
- circuit breaker
- arc extinguishing
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- 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.)
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Abstract
The utility model discloses a low-voltage breaker and aims to provide a low-voltage breaker which exhibits a better electric arc breaking ability and rapid and effective arc extinguishing. Key points of the technical scheme of the low-voltage breaker are in that the low-voltage breaker comprises a housing, a first housing and a second housing are connected to form the housing, a movable contact, a static contact, a tripping device and an arc extinguishing mechanism are disposed in the breaker housing, the arc extinguishing mechanism comprises a plurality of arc extinguishing gate pieces which are successively arranged, one side of each arc extinguishing gate piece is provided with a U-shaped opening, an edge of each U-shaped opening is provided with a plurality of open grooves, cross sections of the open grooves are in the shape of arc-shaped openings in different sizes, and side walls of the open grooves are further provided with a plurality of steps; and the opening size of the U-shaped opening of each arc extinguishing gate piece gradually expands in the direction from a contact point between the movable contact and the static contact to a reset point of the movable contact. The utility model is suitable for the low-voltage breaker.
Description
Technical field
The utility model relates to a kind of electrical equipment of low voltage and manufactures field, and more particularly, it relates to a kind of low-voltage circuit breaker.
Background technology
Miniature circuit breaker has short circuit current defencive function and overload current defencive function conventionally; the arc quenching system of existing miniature circuit breaker; in the time of disjunction short circuit current; electric arc will just can enter arc-extinguishing mechanism through the cavity of certain distance; the electric current flowing through near conductor structure in this process electric arc produces magnetic field, and electric arc is subject to the effect of power and moves into arc-extinguishing mechanism in this magnetic field.Owing to there is no the parts of special generation magnetic blow-out, arc blow-out ability is inadequate, makes electric arc enter the speed that arc-extinguishing mechanism extinguishes very slow.
Therefore, the small-sized low-voltage circuit breaker of some model specification on market now, just at side setting " U " shape opening of each arc extinguishing grid pieces of arc-extinguishing mechanism, and the movement locus that moving contact is produced in the time doing to disconnect with Operating In Persistent Current Mode with fixed contact is located in " U " shape opening of each arc extinguishing grid pieces, make moving contact in the time disconnecting with fixed contact, be positioned at the contact on moving contact top from " U " shape opening part process of each arc extinguishing grid pieces, electric arc can promptly be extinguished by arc-extinguishing mechanism.
Although this small-sized low-voltage circuit breaker is compared traditional circuit breaker, its arc quenching effect has had very large improvement, but, the arc-extinguishing mechanism of this structure is high, the disjunction of its electric arc and quick ability of effectively carrying out arc extinguishing need to improve, in the time running into electric arc and not being pulled off for a long time, cause the electric arc overlong time of burning in Shell of circuit breaker, easily damage each parts of circuit breaker inside.
Utility model content
The deficiency existing for prior art, the purpose of this utility model is to provide that a kind of electric arc breaking capacity is better, arc extinguishing low-voltage circuit breaker more rapidly and effectively.
For achieving the above object, the utility model provides following technical scheme: a kind of low-voltage circuit breaker, comprise housing, described housing is formed by connecting by the first housing and the second housing, in described Shell of circuit breaker, comprise moving contact, fixed contact, trip gear and arc-extinguishing mechanism, described arc-extinguishing mechanism comprises the some arc extinguishing grid pieces that set gradually, one side of described each arc extinguishing grid pieces all arranges " U " shape opening, the edge of described each " U " shape opening is equipped with some flutings, the cross section of described each fluting is the circular arc opening shape of different sizes, on the sidewall of each fluting, be also provided with some steps,
The openings of sizes of " U " shape opening of described each arc extinguishing grid pieces expands gradually from contact point to the direction of moving contact reduction point of moving contact and fixed contact.
By adopting technique scheme, fluting is set, can utilize these fluting breaking arcs, make described arc extinguishing grid pieces there is better electric arc breaking capacity, meanwhile, and on each fluting, step is set, can utilize these steps to change the cross-sectional area of fluting, thereby make electric arc form the different magnetic field configuration of structure, coordinate " U " shape opening, electric arc is cut to arc, arc extinguishing fast and effectively simultaneously; In addition, the openings of sizes of " U " shape opening of described each arc extinguishing grid pieces is expanded gradually from contact point to the direction of moving contact reduction point of moving contact and fixed contact, prevent that arc extinguishing grid pieces from stopping the movement position of moving contact on the one hand, on the other hand, further promote the ability of breaking of electric arc, therefore, the arc-extinguishing mechanism in described low-voltage circuit breaker, electric arc breaking capacity is better, arc extinguishing is effective more fast.
The utility model is further set to: the opening two ends of described each " U " shape opening are equipped with for preventing that electric arc from leaving the flange of arc-extinguishing mechanism;
All fixed contact direction depressions be gathering shape towards the center of self dorsad of two flange of described each " U " shape opening.
By adopting technique scheme, flange is set, can utilize described flange to prevent that electric arc from leaving arc-extinguishing mechanism, thereby avoid electric arc to alter outward, damage from other structures of enclosure interior.
The utility model is further set to: described each arc extinguishing grid pieces is arranged at intervals with some hollow-out parts, and the fretwork area of described each hollow-out parts is all unequal.
By adopting technique scheme, be arranged at intervals with some hollow-out parts at described each arc extinguishing grid pieces, and make the fretwork area of each hollow-out parts all unequal, can utilize these hollow-out parts to make the electric arc that circuit breaker produces form the different magnetic field configuration of structure, the directed speed of electric arc is faster, reduce the time that electric arc exists, avoided electric arc to damage circuit breaker.
The utility model is further set to: the cross section of described each hollow-out parts is all quincunx.
By adopting technique scheme, described each hollow-out parts is arranged to quincunx, can utilize the petal-shaped hollow out in quincunx, elongate, breaking arc the raising of realization to described arc extinguishing grid pieces arc quenching effect.
The utility model is further set to: described each arc extinguishing grid pieces dorsad separately one end of " U " shape opening is provided with groove and is embedded at housing.
By adopting technique scheme, be provided with groove in one end of " U " shape opening dorsad separately at described each arc extinguishing grid pieces, not only save material, and, on housing, arrange and its phase embedding, the groove that coordinates, can play fixing, spacing effect, thereby ensure the arc quenching effect of described circuit breaker.
The utility model is further set to: the bottom of described each " U " shape opening is equipped with arc striking piece, and described arc striking piece bends, extends to the direction of moving contact reduction point from the contact point of moving contact and fixed contact.
By adopting technique scheme, can utilize described arc striking piece that electric arc is promptly spread, broken to the arc extinguishing grid pieces setting gradually, alleviate the ablation of electric arc to single arc extinguishing grid pieces, reduced the working temperature in low-voltage circuit breaker simultaneously, extended the life-span of low-voltage circuit breaker.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model low-voltage circuit breaker embodiment;
Fig. 2 is the structural representation of arc-extinguishing mechanism in the utility model;
Fig. 3 is the structural representation of the arc extinguishing grid pieces in the utility model.
Reference numeral: 1, housing; 11, the first housing; 12, the second housing; 2, moving contact; 3, fixed contact; 4, arc-extinguishing mechanism; 41, arc extinguishing grid pieces; 411, " U " shape opening; 412, fluting; 413, step; 414, flange; 415, hollow-out parts; 416, groove; 417, arc striking piece.
Embodiment
Referring to figs. 1 through Fig. 3, the utility model low-voltage circuit breaker embodiment is described further.
As shown in Figure 1 to Figure 3, a kind of low-voltage circuit breaker, comprise housing 1, described housing 1 is formed by connecting by the first housing 11 and the second housing 12, in described Shell of circuit breaker 1, comprise moving contact 2, fixed contact 3, trip gear and arc-extinguishing mechanism 4, described arc-extinguishing mechanism 4 comprises the some arc extinguishing grid pieces that set gradually 41, one side of described each arc extinguishing grid pieces 41 all arranges " U " shape opening 411, the edge of described each " U " shape opening 411 is equipped with some flutings 412, the cross section of described each fluting 412 is the circular arc opening shape of different sizes, on the sidewall of each fluting 412, be also provided with some steps 413,
The openings of sizes of " U " shape opening 411 of described each arc extinguishing grid pieces 41 expands gradually and (it should be noted that herein to the direction of moving contact 2 reduction points from moving contact 2 and the contact point of fixed contact 3, for convenient production, saving technique, the present embodiment is preferably made same specification by " U " shape opening 411 of each arc extinguishing grid pieces 41, and according to this along oblique line spread configuration; In addition, the technology that described trip gear is known to the skilled person, and the present embodiment do not make improvements trip gear, and the present embodiment repeats no more).
Fluting 412 is set, can utilize these 412 breaking arcs of slotting, make described arc extinguishing grid pieces 41 there is better electric arc breaking capacity, simultaneously, and on each fluting 412, step 413 is set, can utilize these steps 413 to change the cross-sectional area of fluting 412, thereby make electric arc form the different magnetic field configuration of structure, coordinate " U " shape opening 411, electric arc is cut to arc, arc extinguishing fast and effectively simultaneously; In addition, the openings of sizes of " U " shape opening 411 of described each arc extinguishing grid pieces 41 is expanded gradually from moving contact 2 and contact point to the direction of moving contact 2 reduction points of fixed contact 3, prevent that arc extinguishing grid pieces 41 from stopping the movement position of moving contact on the one hand, on the other hand, further promote the ability of breaking of electric arc, therefore, the arc-extinguishing mechanism 4 in described low-voltage circuit breaker, electric arc breaking capacity is better, arc extinguishing is effective more fast.
The opening two ends of described each " U " shape opening 411 are equipped with for preventing that electric arc from leaving the flange 414 of arc-extinguishing mechanism 4;
All fixed contact direction depressions be gathering shape towards the center of self dorsad of two flange 414 of described each " U " shape opening 411.
Flange 414 is set, can utilizes described flange 414 to prevent that electric arc from leaving arc-extinguishing mechanism 4, thereby avoid electric arc to alter outward, damage from other structures of housing 1 inside.
Described each arc extinguishing grid pieces 41 is arranged at intervals with some hollow-out parts 415, and the fretwork area of described each hollow-out parts 415 is all unequal.
Be arranged at intervals with some hollow-out parts 415 at described each arc extinguishing grid pieces 41, and make the fretwork area of each hollow-out parts 415 all unequal, can utilize these hollow-out parts 415 to make the electric arc that circuit breaker produces form the different magnetic field configuration of structure, the directed speed of electric arc is faster, reduce the time that electric arc exists, avoided electric arc to damage circuit breaker.
It is quincunx that the cross section of described each hollow-out parts 415 is all.
Described each hollow-out parts 415 is arranged to quincunx, can be utilized the petal-shaped hollow out in quincunx, elongate, breaking arc, realize the raising to described arc extinguishing grid pieces 41 arc quenching effects.
Described each arc extinguishing grid pieces 41 dorsad separately one end of " U " shape opening 411 is provided with groove 416 and is embedded at housing 1.
Be provided with groove 416 in one end of " U " shape opening 411 dorsad separately at described each arc extinguishing grid pieces 41, not only save material, and, on housing 1, arrange and its phase embedding, the groove that coordinates, can play fixing, spacing effect, thereby ensure the arc quenching effect (it should be noted that, described groove 416, in running into described arc-extinguishing mechanism 4 and cannot eliminating electric arc in the short time, can also coordinate " U " shape opening 411 to play certain arc extinguishing effect) of described circuit breaker herein.
The bottom of described each " U " shape opening 411 is equipped with arc striking piece 417, and described arc striking piece 417 bends, extends to the direction of moving contact 2 reduction points from moving contact 2 and the contact point of fixed contact 3.
Can utilize described arc striking piece 417 that electric arc is promptly spread, broken to the arc extinguishing grid pieces 41 setting gradually, alleviate the ablation of electric arc to single arc extinguishing grid pieces 41, reduce the working temperature in low-voltage circuit breaker simultaneously, extend the life-span of low-voltage circuit breaker.
The above makes preferred implementation of the present utility model, does not depart from for the person of ordinary skill of the art under the prerequisite of the utility model principle, can also make some modification and improvement, and these also should be considered as protection range of the present utility model.
Claims (6)
1. a low-voltage circuit breaker, comprise housing, described housing is formed by connecting by the first housing and the second housing, in described Shell of circuit breaker, comprise moving contact, fixed contact, trip gear and arc-extinguishing mechanism, described arc-extinguishing mechanism comprises the some arc extinguishing grid pieces that set gradually, one side of described each arc extinguishing grid pieces all arranges " U " shape opening, it is characterized in that: the edge of described each " U " shape opening is equipped with some flutings, the cross section of described each fluting is the circular arc opening shape of different sizes, on the sidewall of each fluting, is also provided with some steps;
The openings of sizes of " U " shape opening of described each arc extinguishing grid pieces expands gradually from contact point to the direction of moving contact reduction point of moving contact and fixed contact.
2. low-voltage circuit breaker according to claim 1, is characterized in that: the opening two ends of described each " U " shape opening are equipped with for preventing that electric arc from leaving the flange of arc-extinguishing mechanism;
All fixed contact direction depressions be gathering shape towards the center of self dorsad of two flange of described each " U " shape opening.
3. low-voltage circuit breaker according to claim 2, is characterized in that: described each arc extinguishing grid pieces is arranged at intervals with some hollow-out parts, and the fretwork area of described each hollow-out parts is all unequal.
4. low-voltage circuit breaker according to claim 3, is characterized in that: the cross section of described each hollow-out parts is all quincunx.
5. low-voltage circuit breaker according to claim 4, is characterized in that: described each arc extinguishing grid pieces dorsad separately one end of " U " shape opening is provided with groove and is embedded at housing.
6. low-voltage circuit breaker according to claim 5, is characterized in that: the bottom of described each " U " shape opening is equipped with arc striking piece, and described arc striking piece bends, extends to the direction of moving contact reduction point from the contact point of moving contact and fixed contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316353.8U CN203882932U (en) | 2014-06-14 | 2014-06-14 | Low-voltage breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420316353.8U CN203882932U (en) | 2014-06-14 | 2014-06-14 | Low-voltage breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203882932U true CN203882932U (en) | 2014-10-15 |
Family
ID=51683406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420316353.8U Expired - Fee Related CN203882932U (en) | 2014-06-14 | 2014-06-14 | Low-voltage breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203882932U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298394A (en) * | 2016-08-30 | 2017-01-04 | 安徽中电兴发与鑫龙科技股份有限公司 | A kind of low-voltage circuit breaker structure |
| CN117810045A (en) * | 2024-03-01 | 2024-04-02 | 霍立克电气有限公司 | Arc extinguishing structure of circuit breaker |
-
2014
- 2014-06-14 CN CN201420316353.8U patent/CN203882932U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298394A (en) * | 2016-08-30 | 2017-01-04 | 安徽中电兴发与鑫龙科技股份有限公司 | A kind of low-voltage circuit breaker structure |
| CN106298394B (en) * | 2016-08-30 | 2019-02-15 | 安徽中电兴发与鑫龙科技股份有限公司 | A kind of low-voltage circuit breaker structure |
| CN117810045A (en) * | 2024-03-01 | 2024-04-02 | 霍立克电气有限公司 | Arc extinguishing structure of circuit breaker |
| CN117810045B (en) * | 2024-03-01 | 2024-04-30 | 霍立克电气有限公司 | Arc extinguishing structure of circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20160614 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |