CN103441049B - Arc ignition structure reinforcing self-excitation magnetic field intensity - Google Patents
Arc ignition structure reinforcing self-excitation magnetic field intensity Download PDFInfo
- Publication number
- CN103441049B CN103441049B CN201310402176.5A CN201310402176A CN103441049B CN 103441049 B CN103441049 B CN 103441049B CN 201310402176 A CN201310402176 A CN 201310402176A CN 103441049 B CN103441049 B CN 103441049B
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- Prior art keywords
- arc
- moving contact
- connecting plate
- terminal block
- striking piece
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- 230000003014 reinforcing effect Effects 0.000 title abstract 2
- 238000005728 strengthening Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000010891 electric arc Methods 0.000 description 12
- 230000003068 static effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
The invention discloses an arc ignition structure reinforcing self-excitation magnetic field intensity. The arc ignition structure comprises an arc-igniting sheet which is arranged below a moving contact in an inclining way. The lower end of the arc-igniting sheet is connected with the lower end of an arc-extinguishing chamber. The upper end of the arc-igniting sheet is arranged closely to the moving contact which is connected with a wiring board via flexible coupling. One side, which is far from the arc-extinguishing chamber, of the arc-igniting sheet is provided with a connecting plate which is vertically arranged. The upper end of the connecting plate is connected with the upper end of the arc-igniting sheet and flexible coupling, and the lower end of the connecting plate is connected with the lower end of a bimetallic sheet in a contacting way. The upper end of the bimetallic sheet is connected with the wiring board in a spacing way. One part of current conducted from the moving contact flows to the wiring board, and another part of current moves downwardly along the arc-igniting sheet and the connecting plate. A self-excitation magnetic field generated by the arc-igniting sheet and the connecting plate is overlaid on one side, which is close to the moving contact, of the upper end of the arc-igniting sheet, and is intensified so that moving speed of an arc is accelerated, and a phenomenon that the arc stagnates below the moving contact is eliminated. Therefore, an arc-distinguishing effect is intensified, and on/off performance of a switch is greatly enhanced.
Description
Technical field
The present invention relates to circuit breaker arc striking technical field, particularly relate to a kind of arc-striking structure strengthening self-excitation field intensity.
Background technology
When the dynamic/static contact in circuit breaker is separated because of faults such as circuit are short-circuited, electric arc can be produced between dynamic/static contact, this electric arc has delayed the opening time of switch, reduces the break performance of switch, even can cause the load in circuit and the serious scaling loss of circuit breaker components.
When being separated to make dynamic/static contact, generation electric arc is introduced in grating arc-extinguishing chamber rapidly, smoothly and extinguishes, traditional way is the arc striking piece arranging some On currents in the chamber at dynamic/static contact place, can produce self-excitation magnetic field around arc striking piece after energising, electric arc enters in arc extinguishing grid pieces and carries out arc extinguishing under the guiding in this self-excitation magnetic field.But due to the concrete structure of arc striking piece and the difference of arrangement, the striking effect difference reached is very large.
As Chinese patent document CN201918328U discloses a kind of arc-striking structure of miniature circuit breaker, it comprises arc control device, moving contact, fixed contact, arc striking piece, described arc striking piece is made up of arc striking piece and striking support, and arc striking piece and the split of striking support are arranged, the elongated end of arc striking piece becomes to contact shape with the elongated end of striking support, and makes the contact top of arc striking piece elongated end and striking support elongated end near the lower surface of moving contact.This circuit breaker by by the contact top of arc striking piece elongated end and striking support elongated end near the lower surface of moving contact, reduce distance between the two, and then reinforcement striking effect.But, in actual applications, because striking electric current to be passed to the lower end of striking support from bimetal leaf, then along the upwards conducting of striking support, when current lead-through to the contact point of arc striking piece and striking support time, one part of current is below arc striking piece obliquely motion conducting to arc extinguishing grid pieces, and another part electric current then moves along the elongated end of arc striking piece towards the direction of moving contact.Arc striking piece and striking support, after On current, can produce self-excitation magnetic field respectively around it, two self-excitation magnetic fields superpose rear pilot arc mutually to arc extinguishing indoor sport.
But because arc striking piece in above-mentioned arc-striking structure and striking support are just to setting, both are roughly contrary at the sense of current of contact jaw, and distance is very near, thus cause the self-excitation magnetic field above arc striking piece substantially to be cancelled out each other.This just makes the self-excitation magnetic field of moving to arc control device for pilot arc above both contact positions excessively weak, so, electric arc can produce stagnation behavior in the below of moving contact, and then the speed causing electric arc to move to arc control device slows down, the opening time of switch will be extended, and reduces the break performance of switch.In addition, upper end due to this arc striking piece is also provided with the elongated end extended to moving contact place, the sense of current in this elongated end deviates from arc control device, the direction in its self-excitation magnetic field produced also is that pilot arc moves towards the opposite direction of arc control device, and so, not only this extension does not play the effect promoting striking, hinder electric arc on the contrary to move to arc control device, reduce further striking effect, cause the disconnection poor-performing of switch, especially for some big current circuit more very.
Summary of the invention
For this reason, the technical problem to be solved in the present invention is to provide one can strengthen self-excitation field intensity below moving contact, promotes that electric arc is to the arc striking piece of arc control device rapid movement.
For achieving the above object, the present invention is by the following technical solutions:
Strengthen an arc-striking structure for self-excitation field intensity, comprise arc striking piece, described arc striking piece is oblique to be arranged on below moving contact, and the lower end of described arc striking piece is connected with the lower end of arc control device, and the upper end of described arc striking piece is arranged near described moving contact; Described moving contact is connected with terminal block by soft strength; The side away from described arc control device of described arc striking piece is provided with the vertical connecting plate arranged, the upper end of described connecting plate is connected with the upper end of described arc striking piece and described soft strength, the lower end of described connecting plate is connected with the lower end in contact of bimetal leaf, and upper end and the described terminal block interval of described bimetal leaf are arranged; Conducting an electric current part of coming from described moving contact, to flow to described terminal block be load supplying, and another part moves downward along described arc striking piece and described connecting plate and produces self-excitation magnetic field with pilot arc to arc extinguishing indoor sport.
The upper end of described connecting plate is fixedly connected with one end of the close described moving contact of described terminal block; Described be flexible coupling to contact with the upper surface of described terminal block connect.
Described connecting plate and described terminal block are integral type structure.
Described bimetal leaf is communicated with by wire with described terminal block, and the position of the contact point of described wire and described bimetal leaf is adjustable along the length direction of described bimetal leaf; The position of described contact point and the power of load match; The electric current flowing through described connecting plate is through described bimetal leaf and conduct to described terminal block by wire, forms parallel circuits with the electric current directly flowing to described terminal block from described moving contact.
The bottom when top of described arc striking piece is positioned at maximum open position higher than described moving contact; The upper end of described arc striking piece and the close also interval of described moving contact are arranged.
The upper end of described arc striking piece, near the position of described moving contact end, forms to the close kink in described moving contact end, and shape and the described moving contact end profile of described kink adapt.
Beneficial effect of the present invention:
1., in arc-striking structure of the present invention, the side away from arc control device of arc striking piece is provided with the vertical connecting plate arranged, and the upper end of connecting plate is connected with the upper end of arc striking piece and soft strength, and the lower end of connecting plate is connected with the lower end in contact of bimetal leaf, be conducted through from moving contact the portion of electrical current come to move downward along arc striking piece and connecting plate, because now sense of current is roughly the same and all point to arc control device, the self-excitation magnetic field that both produce is intensity enhancing after the close moving contact side superposition of arc striking piece upper end, especially the magnetic field intensity below close moving contact is double arc striking piece to produce magnetic field herein substantially, the electric arc that magnetic field after superposition facilitates moving contact place is rapidly to arc extinguishing indoor sport, eliminate the phenomenon that electric arc is stagnated herein, thus strengthen arc quenching effect, substantially increase the break performance of switch.
2. the connecting plate in the present invention and described terminal block are integral type structure, and this structural design can reduce the amount of parts of circuit breaker internal, improve efficiency of assembling and production efficiency, can also reduce production cost simultaneously.
3. bimetal leaf of the present invention is directly-heated type bimetal leaf, and flow through portion of electrical current from moving contact and directly flow to terminal block shunting, another part electric current flow to the bottom of bimetal leaf from connecting plate, and then to be back to terminal block be load supplying.To some high-current circuits, if be directly arranged between moving contact and terminal block by bimetal leaf, then need bimetal leaf to have higher performance, and these high performance bimetal leaf prices are all higher, this can increase the cost of manufacture of whole switch undoubtedly; And flowing into bimetal leaf again after being shunted by portion of electrical current, then the electric current now flowing into bimetal leaf is relatively little, uses the bimetal leaf technical ability of common performance to meet the demands, and cost is done in the meeting that therefore can reduce whole switch.
4. bimetal leaf of the present invention is connected with terminal block by wire, and the position of the contact point of wire and bimetal leaf is adjustable along the length direction of bimetal leaf; And the power of the particular location of contact point and load matches.The present invention, by regulating the particular location of the contact point of wire and bimetal leaf, changes bimetal leaf in resistance sizes in circuit, to make killer switch can adapt to unequally loaded circuit, thus improves the scope of application of circuit breaker.
5. the top of arc striking piece of the present invention is near the position of described moving contact end, and there is the kink corresponding to moving contact end profile, compare the arc striking piece of linear structure, this kink can make arc striking piece have more part more near moving contact, thus the self-excitation field intensity below moving contact is strengthened further, be conducive to promoting that electric arc is to arc extinguishing indoor sport, and then improve the break performance of arc quenching effect and switch.
Accompanying drawing explanation
In order to make the content of invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 be arc-striking structure of the present invention with adjacent component coordinate schematic diagram;
Fig. 2 is the structural representation of arc striking piece of the present invention;
The structural representation that Fig. 3 is connecting plate of the present invention and terminal block when being integral type structure.
In figure, Reference numeral is expressed as:
1-moving contact; 2-soft strength; 3-arc striking piece; 31-kink; 4-connecting plate; 5-bimetal leaf; 6-terminal block.
Embodiment
Be a kind of arc-striking structure strengthening self-excitation field intensity of the present invention see Fig. 1, comprise arc striking piece 3, described arc striking piece 3 is oblique to be arranged on below moving contact 1, the described lower end of arc striking piece 3 is connected with the lower end of arc control device, described moving contact 1 is connected with terminal block 6 for load supplying by soft strength 2, and described soft strength 2 contacts with the upper surface of described terminal block 6 and connects; The side away from described arc control device of described arc striking piece 3 is provided with the connecting plate 4 of some vertical settings.In the present embodiment, described connecting plate 4 is set to one, the upper end of described connecting plate 4 is connected with the upper end of described arc striking piece 3 and described soft strength 2, and the lower end of described connecting plate 4 is connected with the lower end in contact of bimetal leaf 5, and upper end and described terminal block 6 interval of described bimetal leaf 5 are arranged; Described connecting plate 4 one aspect can play the effect of On current, on the other hand, also can play the effect supporting described arc striking piece 3 and described terminal block 6.
Conducting that the electric current part stream of coming flows to after described terminal block 6 from described moving contact 1 is load supplying, and another part moves downward along described arc striking piece 3 and described connecting plate 4 and produces magnetic field of encouraging oneself with pilot arc to arc extinguishing indoor sport.
Described bimetal leaf 5 is communicated with by wire with described terminal block 6, and the position of the contact point of described wire and described bimetal leaf 5 is adjustable along the length direction of described bimetal leaf 5; The position of described contact point and the power of load match; Also just say, the electric current directly flowing to described terminal block 6 from described moving contact 1 with from flowing through described connecting plate 4, the electric current of bimetal leaf 5 forms parallel circuits, described moving contact 1, described in be flexible coupling 2, path that described terminal block 6 is formed can share portion of electrical current, thus reduces the electric current that flows through on described bimetal leaf 5.This parallel design can reduce the demand of the bimetal leaf to high-performance high price, thus reduces product cost, is specially adapted to the miniature circuit breaker product that electric current is greater than 63 amperes.
In the present embodiment, the position of the contact point of described wire and described bimetal leaf 5 is adjustable along the length direction of described bimetal leaf 5, when described contact point is when the bottom of described bimetal leaf 5, the partial-length being arranged in loop due to described bimetal leaf 5 is shorter, resistance is less, can apply in the lower-powered circuit with load; Otherwise when the bottom of described contact point away from described bimetal leaf 5, the part being arranged in loop due to described bimetal leaf 5 is longer, resistance is comparatively large, now can apply in the circuit larger with the power of load; The particular location of described contact point in the present embodiment and the power of load match, and can increase the scope of application of the present invention very easily.Certainly, described bimetal leaf 5 in the present embodiment is connected with moving contact by linkage, to disconnect dynamic/static contact when thermal expansion occurred bimetal leaf, thus cuts off circuit, as the common practise of this area, described linkage is not shown in figures.
In the present embodiment, the lower end when upper end of described arc striking piece 3 is positioned at maximum open position higher than described moving contact 1; The upper end of described arc striking piece 3 and the close also interval of described moving contact 1 are arranged.See Fig. 2, the upper end of described arc striking piece 3 is near the position of described moving contact 1 end, there is the kink 31 corresponding to the profile of described moving contact 1 end near described arc striking piece 3 side, described kink 31 make described arc striking piece 3 relatively have comparatively many parts near described moving contact 1, thus the self-excitation field intensity improved further below described moving contact 1, promote that electric arc is to arc extinguishing indoor sport.
See Fig. 3, as another embodiment of the invention, described connecting plate 4 is integral type structure with described terminal block 6.Thisly be designed with the quantity being beneficial to and reducing switch internal parts, improve assembling speed, and then enhance productivity.
Above-mentioned embodiment is just explained in detail technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; every improvement on basis of the present invention according to above-mentioned principle and spirit, substitute, all should within protection scope of the present invention.
Claims (5)
1. strengthen an arc-striking structure for self-excitation field intensity, comprise
Arc striking piece (3), described arc striking piece (3) is oblique is arranged on moving contact (1) below, and the lower end of described arc striking piece (3) is connected with the lower end of arc control device, and the upper end of described arc striking piece (3) is arranged near described moving contact (1); Described moving contact (1) is connected with terminal block (6) by soft strength (2);
It is characterized in that: the side away from described arc control device of described arc striking piece (3) is provided with the vertical connecting plate (4) arranged, the upper end of described connecting plate (4) is connected with the upper end of described arc striking piece (3) and described soft strength (2), the lower end of described connecting plate (4) is connected with the lower end in contact of bimetal leaf (5), and upper end and described terminal block (6) interval of described bimetal leaf (5) are arranged; Conducting an electric current part of coming from described moving contact (1), to flow to described terminal block (6) be load supplying, and another part moves downward along described arc striking piece (3) and described connecting plate (4) and produces self-excitation magnetic field with pilot arc to arc extinguishing indoor sport; The upper end of described connecting plate (4) is fixedly connected with one end of the close described moving contact (1) of described terminal block (6); Described soft strength (2) contacts with the upper surface of described terminal block (6) and connects.
2. a kind of arc-striking structure strengthening self-excitation field intensity according to claim 1, is characterized in that: described connecting plate (4) and described terminal block (6) are integral type structure.
3. a kind of arc-striking structure strengthening self-excitation field intensity according to claim 2, it is characterized in that: described bimetal leaf (5) is communicated with by wire with described terminal block (6), the position of the contact point of described wire and described bimetal leaf (5) is adjustable along the length direction of described bimetal leaf (5); The position of described contact point and the power of load match; The electric current flowing through described connecting plate (4) is through described bimetal leaf (5) and conduct to described terminal block (6) by wire, forms parallel circuits with the electric current directly flowing to described terminal block (6) from described moving contact (1).
4. according to the arbitrary described a kind of arc-striking structure strengthening self-excitation field intensity of claim 1-3, it is characterized in that: the bottom when top of described arc striking piece (3) is positioned at maximum open position higher than described moving contact (1); The upper end of described arc striking piece (3) and the close also interval of described moving contact (1) are arranged.
5. a kind of arc-striking structure strengthening self-excitation field intensity according to claim 4, it is characterized in that: the upper end of described arc striking piece (3) is near the position of described moving contact (1) end, form the kink (31) close to described moving contact (1) end, shape and described moving contact (1) end profile of described kink (31) adapt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402176.5A CN103441049B (en) | 2013-09-06 | 2013-09-06 | Arc ignition structure reinforcing self-excitation magnetic field intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402176.5A CN103441049B (en) | 2013-09-06 | 2013-09-06 | Arc ignition structure reinforcing self-excitation magnetic field intensity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103441049A CN103441049A (en) | 2013-12-11 |
| CN103441049B true CN103441049B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310402176.5A Expired - Fee Related CN103441049B (en) | 2013-09-06 | 2013-09-06 | Arc ignition structure reinforcing self-excitation magnetic field intensity |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338868A1 (en) * | 1988-04-21 | 1989-10-25 | Hager Electro S.A. | Modular electrical protection or control apparatus |
| EP0387761A2 (en) * | 1989-03-13 | 1990-09-19 | Licentia Patent-Verwaltungs-GmbH | Automatic circuit breaker, particularly automatic cut-out |
| DE10117346B4 (en) * | 2001-04-06 | 2004-05-06 | Siemens Ag | Circuit breaker with an extinguishing device |
| CN202712098U (en) * | 2012-07-27 | 2013-01-30 | 法泰电器（江苏）股份有限公司 | Breaker arc-extinguishing device with protection against reverse current |
| CN203406252U (en) * | 2013-09-06 | 2014-01-22 | 浙江大华开关厂 | Arc striking structure for enhancing self-excited magnetic field intensity |
-
2013
- 2013-09-06 CN CN201310402176.5A patent/CN103441049B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338868A1 (en) * | 1988-04-21 | 1989-10-25 | Hager Electro S.A. | Modular electrical protection or control apparatus |
| EP0387761A2 (en) * | 1989-03-13 | 1990-09-19 | Licentia Patent-Verwaltungs-GmbH | Automatic circuit breaker, particularly automatic cut-out |
| DE10117346B4 (en) * | 2001-04-06 | 2004-05-06 | Siemens Ag | Circuit breaker with an extinguishing device |
| CN202712098U (en) * | 2012-07-27 | 2013-01-30 | 法泰电器（江苏）股份有限公司 | Breaker arc-extinguishing device with protection against reverse current |
| CN203406252U (en) * | 2013-09-06 | 2014-01-22 | 浙江大华开关厂 | Arc striking structure for enhancing self-excited magnetic field intensity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103441049A (en) | 2013-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG DAHUA SWITCH FACTORY Free format text: FORMER OWNER: HUAKUN ELECTRIC CO., LTD. Effective date: 20131113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20131113 Address after: 325600, No. 9, Temple Road, Xinguang industrial district, Liushi Town, Zhejiang, Yueqing Applicant after: Zhejiang Dahua Switchgear Factory Address before: 325600, No. 9, Temple Road, Xinguang industrial district, Liushi Town, Yueqing, Zhejiang, Wenzhou Applicant before: Huakun Electric Co., Ltd. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 325604 No. 86 long march road, Liushi Town, Zhejiang, Yueqing Applicant after: Zhejiang Dahua Electric Co., Ltd. Address before: 325600, No. 9, Temple Road, Xinguang industrial district, Liushi Town, Zhejiang, Yueqing Applicant before: Zhejiang Dahua Switchgear Factory |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG DAHUA SWITCH FACTORY TO: ZHEJIANG DAHUA ELECTRIC CO., LTD. |
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| 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: 20150722 Termination date: 20180906 |
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| CF01 | Termination of patent right due to non-payment of annual fee |