CN1209777C - Arc extinguishing equipment for breaker with plastic shell - Google Patents
Arc extinguishing equipment for breaker with plastic shell Download PDFInfo
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- CN1209777C CN1209777C CN 03116705 CN03116705A CN1209777C CN 1209777 C CN1209777 C CN 1209777C CN 03116705 CN03116705 CN 03116705 CN 03116705 A CN03116705 A CN 03116705A CN 1209777 C CN1209777 C CN 1209777C
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- arc
- breaker
- integral type
- plastic casing
- control device
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Abstract
The present invention relates to an arc suppressing unit for breakers with plastic casings, which is characterized in that a magnetism drive iron core is embedded in a U-shaped fixed contact; the magnetism drive iron core and the U-shaped fixed contact are fixedly clamped on a convex table of an entirety type arc suppressing cover together; V-shaped arc suppressing grid sheets are directly and fixedly clamped in a groove of the entirety type arc suppressing cover and arranged in a sectorial mode; a cheek plate is directly sheathed on the entirety type arc suppressing cover. The new arc suppressing unit is applied to the breakers with the plastic casings, and accordingly, the dead time of electric arcs on the surface of the contact can be reduced and the electric arcs are generated when the breaker with the plastic casing is switched on or off, and then, the burning loss of the surface of the contact from the electric arcs is lightened, and also, metal particles generated because the electric arcs burn grid sheets are reduced, and accordingly, the electrical durability of the breaker with the plastic casing is extended, and the reliability of the breaker with the plastic casing is enhanced. Because the parts are integrally formed, the present invention has the advantages of simple structure and easy assembly.
Description
Technical field
The invention belongs to the low-voltage circuit breaker technical field, be specifically related to a kind of arc-control device of breaker of plastic casing.
Background technology
Low-voltage electrical apparatus is that electric energy is sent to indispensable link in user's the electric power system, mainly is to play the distribution electric energy in transformer side to load-side, and the effect of protection and control distribution line is started, regulates, stopped and demonstration and defencive function load.Low-voltage circuit breaker belongs to a class wherein, and low-pressure plastic shell circuit breaker comprises plastic casing, transmission mechanism, contact system, arc-control device and release.The quality of arc-control device design directly influences the technical performance index and the reliability of breaker of plastic casing.Each big electrical equipment company of the world is all studied in the structure to arc-control device, Recent study goes out some new arc extinguishing technology, metallic vapour jet flow technology for example, magnetic blow-out technology etc., the appearance of these technology improves the short circuit breaking capacity of breaker of plastic casing and reliability greatly.
Elaboration for prior art will help to understand purpose of the present invention, technical characterictic and beneficial effect.Fig. 8 has showed known breaker of plastic casing arc-control device.In this arc-control device 6, have and to be fan-shaped array by the V-type groove arc extinguishing grid pieces 8 of moving contact 9 and with suitable gap, side plate 7 with the melamine glass cloth laminated sheet behind arc extinguishing grid pieces 8 closed assemblies is supported, and arc extinguishing grid pieces 8 is passed through the riveted fixed processing on side plate 7.Fig. 9 is the cutaway view that the breaker of plastic casing mains side of above-mentioned arc-control device is housed, fixed contact 12 adopts goes up the inlet wire conducting loop structure, moving contact 9 is in the centre of fixed contact 12 closing timesharing, arc-control device 6 is placed on the fixed contact 12, place a plastic jacket 11 in fixed contact 12 middle parts, fixed contact 13 is fixed on the fixed contact 12 by welding processing, and moving contact 10 is fixed on the moving contact 9 by welding processing.Arc-control device 6 and fixed contact 12 and plastic jacket 11 are separately fixing.
As everyone knows, therefore the sense of current that flows through fixed contact 12 produces electrodynamic repulsion force between two electric currents with the opposite current that flows through moving contact 9, and the effect because of electrodynamic repulsion force when big short circuit current takes place impels moving contact 9 to scold out, thus limiting short-circuit current.When moving contact 10, fixed contact 13 is at the switch branch, fashionable generation electric arc is under voltage contact area self-excitation field action, with the internal drive of electric arc towards arc-control device 1, along with electric arc elongates in arc-control device 1, and be divided into several short electric arc, arc voltage (Uarc) is improved, thereby make arc extinction, simultaneously, the plastic jacket 11 that is placed on fixed contact 12 centres is at moving contact 10, fixed contact 13 is at the switch branch, fashionable generation electric arc, because of the high temperature of electric arc, cover 11 surfaces are melted and are produced steam, and its steam is restricted electric arc arc root and cools off, also impel arc voltage (Uarc) to be raised rapidly, thereby help arc extinction.
But there is following problem at least in this class arc-control device 6: 1, the cumbersome manufacturing cost that causes of operation that is fixed on the side plate 7 owing to the V-type arc extinguishing grid pieces 8 with multi-disc increases; 2, the high temperature owing to electric arc makes V-type arc quenching plate 8 melt surfaces when big short circuit current takes place, the metallic particles that is produced is attached to causing abnormal high temperature on the contact surface, again owing to arc-control device 6 opens wide near the mechanisms place, metallic particles is easy to enter operating mechanism, influences the normal running of operating mechanism.
Summary of the invention
The purpose of this invention is to provide a kind of have strengthen voltage contact area magnetic field, reduce electric arc the magnetic of the dead time on fixed contact surface drive iron core, magnetic drive iron core and arc-control device form one, arc-chute handles all-in-one-piece breaker of plastic casing arc-control device simple in structure directly embedding, that arc-control device and arc-extinguish chamber unite two into one.
To achieve these goals, the arc-control device of breaker of plastic casing of the present invention has following formation:
The arc-control device of this breaker of plastic casing, mainly comprise U type fixed contact, magnetic drives iron core, the integral type arc-extinguish chamber, V-type arc extinguishing grid pieces and cheek, its main feature is, one vacancy is arranged in the middle of the described U type fixed contact bending place, fasten with the corresponding boss of integral type arc-extinguish chamber bottom, described magnetic drives the inboard that iron core snaps in the bending of fixed contact U type, be fixed by integral type arc-extinguish chamber bottom boss simultaneously, the integral type arc extinguishing is covered with the inner chamber that a cross section is a spill, offer a plurality of draw-in grooves on the inner chamber two side, arc extinguishing grid pieces directly inserts by this draw-in groove and is fixed in the integral type arc-extinguish chamber inner chamber, the cheek cross section is a spill, and fixes due to integral type arc-extinguish chamber outside to relative direction cover so that cross section is recessed with the integral type arc-extinguish chamber.
Magnetic in the arc-control device of this breaker of plastic casing drives iron core and is made by insulation board and elements of magnetic material.
Being used to constitute the elements of magnetic material that magnetic drives iron core in the arc-control device of this breaker of plastic casing is made by mutual riveted of several pieces magnetic material thin plates or whole magnetic material.
Integral type arc-extinguish chamber in the arc-control device of this breaker of plastic casing is made by the polybutylene terephthalate (PBT) material.
Cheek in the arc-control device of this breaker of plastic casing is made by magnetic material thin plate or iron plate.
Because adopt this invention breaker of plastic casing arc-control device, thereby make the technical indicator of breaker of plastic casing, particularly electric life improves greatly, and short circuit breaking capacity also is improved, and simultaneously the reliability of breaker of plastic casing is improved.
Description of drawings
Fig. 1 is an overall structure critical piece three-dimensional combination figure of the present invention;
Fig. 2 is an overall structure stereogram of the present invention;
Fig. 3 is an overall structure cut-away view of the present invention;
Fig. 4 is the whole arc quenching chamber structure schematic diagram of the present invention;
Fig. 5 drives the iron core schematic diagram for magnetic of the present invention;
Fig. 6 is a U type fixed contact schematic diagram of the present invention;
Fig. 7 is a cheek schematic diagram of the present invention;
Fig. 8 is known breaker of plastic casing arc-control device;
Fig. 9 is the cutaway view that the breaker of plastic casing mains side of the known arc-control device of Fig. 8 is housed.
Embodiment
Below in conjunction with accompanying drawing and example the present invention is described in further detail.Should be appreciated that feature and advantage that this is clearly demarcated will seem more clear clear by a following preferred embodiment, but the present invention not merely is limited to following embodiment.
In this preferred embodiment, the structure of the arc-control device of the breaker of plastic casing that this is novel, mainly comprise U type fixed contact 1, magnetic drives iron core 2, integral type arc-extinguish chamber 3, V-type arc extinguishing grid pieces 5 and cheek 4, one vacancy is arranged in the middle of this U type fixed contact 1 bending part, fasten with the corresponding boss of integral type arc-extinguish chamber 3 bottoms, above-mentioned magnetic drives the inboard that iron core 2 snaps in the U type bending of fixed contact 1, be fixed by integral type arc-extinguish chamber 3 bottom boss simultaneously, the inner chamber that it is spill that this integral type arc-extinguish chamber 3 has a cross section, offer a plurality of draw-in grooves on the inner chamber two side, an arc extinguishing grid pieces 5 directly inserts by this draw-in groove and is fixed in integral type arc-extinguish chamber 3 inner chambers, other has cheek 4 cross sections is spill, and fixes due to integral type arc-extinguish chamber 3 outsides to relative direction cover so that cross section is recessed with integral type arc-extinguish chamber 3.
Above-mentioned magnetic drives iron core 2 and supports side plate 2a, 2c and elements of magnetic material to make by insulation, is used to constitute the elements of magnetic material that magnetic drives iron core 2 and is made by the mutual riveted of several pieces magnetic material thin plates, also can be made by integral type magnetic material 2b.This integral type arc-extinguish chamber 3 is made by polybutylene terephthalate (PBT) (being called for short PBT) material.Cheek 4 is made by the magnetic material thin plate simultaneously, also can be made by iron plate.
In this breaker of plastic casing, owing to adopted U type fixed contact 1, this fixed contact 1 adopts goes up the inlet wire conducting loop structure, and it directly is entrapped in integral type arc-extinguish chamber 3 bottoms, makes this fixed contact 1 middle integral type arc-extinguish chamber 3 that is equipped with.More excellent is that this integral type arc-extinguish chamber 3 is formed by the compacting of PBT plastics.The V-type arc extinguishing grid pieces 5 that adopts in this breaker of plastic casing directly embeds in the integral type arc-extinguish chamber 3, and does not need riveted, makes the fixedly production process of arc extinguishing grid pieces simplify greatly like this.Cheek 4 among the present invention directly cover is stuck in integral type arc-extinguish chamber 3 outsides, and the intensity of integral type arc-extinguish chamber 3 has been strengthened in the effect of cheek 4 existing fixedly arc extinguishing grid pieces 5 again.More excellent is that cheek 4 can be made by magnetic material thin plate or iron plate.Be embedded with magnetic in the U type fixed contact 1 of the present invention and drive iron core 2, this magnetic drives iron core 2 and supports side plate 2a, 2c and magnetic iron plate to make by riveted by insulation, and it directly is inlaid in the lower end of fixed contact 1 and integral type arc-extinguish chamber 3.More excellent is that magnetic drives iron core used magnetic material and can be made by several mutual riveteds of magnetic material thin plate or integral type magnetic material 2b.Because above-mentioned each several part is integrally formed, and structure is become simply, assembling is more prone to.
In the present invention, switch closes timesharing, produce electric arc,, whole arc-extinguish chamber 3 surfaces are melted and generation steam because of the high temperature of electric arc, its steam is restricted the arc root of electric arc and cools off, make the huge surge of pressure in this arc-control device matrix chamber big because of a large amount of steam produces simultaneously, compressing electric arc enters the grid sheet 5 that goes out fast, makes electric arc be divided into short electric arc by long arc, improve arc voltage (Uarc), reach the effect of quick extinguish arcs.Meanwhile, when electric current flow through U type fixed contact 1, magnetic drove iron core 2 and produces magnetic field, because the effect in magnetic field, make electric arc leave the surface of fixed contact 1 as soon as possible, reduced the dead time of electric arc, strengthen the magnetic field of voltage contact area simultaneously, improved arc voltage, electric arc is easily cut off.In addition, electric arc enters in the arc-extinguish chamber chamber, because of cheek 4 is made by magnetic sheet or iron plate, be installed on the whole arc-extinguish chamber 3, an one effect is an intensity of strengthening integral type arc-extinguish chamber 3, and another effect is after electric arc enters arc extinguishing grid pieces 5, by arcing, make cheek 4 produce magnetic field, strengthen magnetic blow-out, play the effect that cuts off electric arc.Simultaneously, because arc-control device is airtight relatively, the metallic particles that arc extinguishing grid pieces 5 surfaces produce also are not easy to enter operating mechanism and the normal running that influences operating mechanism.Thereby the arc-control device of breaker of plastic casing of the present invention will reduce effectively because of switch and close electric arc that branch produces dead time in contact surface, reach and alleviate the scaling loss of electric arc, and reduce because of electric arc arc extinguishing grid pieces 5, contact are melted the metallic that produces contact surface.
Claims (5)
1, a kind of arc-control device of breaker of plastic casing, mainly comprise U type fixed contact (1), magnetic drives iron core (2), integral type arc-extinguish chamber (3), V-type arc extinguishing grid pieces (5) and cheek (4), it is characterized in that: a vacancy is arranged in the middle of described U type fixed contact (1) bending part, fasten with the corresponding boss of integral type arc-extinguish chamber (3) bottom, described magnetic drives the inboard that iron core (2) snaps in the bending of fixed contact (1) U type, be fixed by integral type arc-extinguish chamber (3) bottom boss simultaneously, it is the inner chamber of spill that integral type arc-extinguish chamber (3) has a cross section, offer a plurality of draw-in grooves on the inner chamber two side, arc extinguishing grid pieces (5) directly inserts by this draw-in groove and is fixed in integral type arc-extinguish chamber (3) inner chamber, cheek (4) cross section is a spill, and fixes due to integral type arc-extinguish chamber (3) outside to relative direction cover so that cross section is recessed with integral type arc-extinguish chamber (3).
2,, it is characterized in that described magnetic drives iron core (2) and made by insulation board and elements of magnetic material according to the arc-control device of the described breaker of plastic casing of claim 1.
3,, it is characterized in that being used to constituting the elements of magnetic material that magnetic drives iron core (2) and make by mutual riveted of several pieces magnetic material thin plates or whole magnetic material according to the arc-control device of the described breaker of plastic casing of claim 2.
4,, it is characterized in that described integral type arc-extinguish chamber (3) made by the polybutylene terephthalate (PBT) material according to the arc-control device of the described breaker of plastic casing of claim 1.
5,, it is characterized in that described cheek (4) made by magnetic material thin plate or iron plate according to the arc-control device of the described breaker of plastic casing of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116705 CN1209777C (en) | 2003-04-29 | 2003-04-29 | Arc extinguishing equipment for breaker with plastic shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116705 CN1209777C (en) | 2003-04-29 | 2003-04-29 | Arc extinguishing equipment for breaker with plastic shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1445802A CN1445802A (en) | 2003-10-01 |
| CN1209777C true CN1209777C (en) | 2005-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116705 Expired - Fee Related CN1209777C (en) | 2003-04-29 | 2003-04-29 | Arc extinguishing equipment for breaker with plastic shell |
Country Status (1)
| Country | Link |
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| CN (1) | CN1209777C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464388C (en) * | 2006-11-11 | 2009-02-25 | 常熟开关制造有限公司(原常熟开关厂） | Arc-suppressing device of plastic shell breaker |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT509277A1 (en) * | 2008-03-05 | 2011-07-15 | Moeller Gebaeudeautomation Gmbh | SWITCHGEAR |
| IT1391125B1 (en) * | 2008-10-15 | 2011-11-18 | Abb Spa | LOW VOLTAGE SWITCH |
| CN101887812A (en) * | 2009-05-12 | 2010-11-17 | 苏州中菱电器制造有限公司 | Improved breaker arc-extinguish chamber |
| CN102315055B (en) * | 2010-06-30 | 2014-11-19 | 北京翠祥电器元件有限公司 | Structure for reducing flashover length of moulded case circuit breaker |
| KR101094775B1 (en) * | 2010-07-06 | 2011-12-16 | 엘에스산전 주식회사 | Arc extinguishing mechanism for circuit breaker |
| CN101986415B (en) * | 2010-11-11 | 2012-12-26 | 江苏辉能电气有限公司 | Arc extinguishing chamber of molded case low voltage circuit breaker |
| CN103383901B (en) * | 2012-05-04 | 2015-08-12 | 伊顿电气有限公司 | A kind of integral type arc insulating apparatus |
| US9006601B2 (en) * | 2013-03-13 | 2015-04-14 | Eaton Corporation | Arc chamber for bi-directional DC |
| WO2016078875A1 (en) * | 2014-11-18 | 2016-05-26 | Eaton Industries (Austria) Gmbh | Switching device |
| CN107195493B (en) * | 2017-06-14 | 2019-06-14 | 上海立新电器控制设备有限公司 | A kind of high pressure arc-extinguish chamber |
-
2003
- 2003-04-29 CN CN 03116705 patent/CN1209777C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464388C (en) * | 2006-11-11 | 2009-02-25 | 常熟开关制造有限公司(原常熟开关厂） | Arc-suppressing device of plastic shell breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1445802A (en) | 2003-10-01 |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DELIXI ELECTRIC LTD. Free format text: FORMER OWNER: DELIXI ELECTRIC APPLIANCES CO., LTD., ZHEJIANG PROV. Effective date: 20080104 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080104 Address after: Yueqing City, Zhejiang province Liushi Delixi high tech Industrial Park Patentee after: Delixi Electric Co., Ltd. Address before: Yueqing City, Zhejiang province Liushi Delixi Industrial Park Patentee before: Delixi Electrical Appliance Co., Ltd., Zhejiang |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Delixi Group Co., Ltd. Assignor: Delixi Electric Co., Ltd. Contract fulfillment period: 2008.6.12 to 2013.6.11 contract change Contract record no.: 2008310000206 Denomination of invention: Arc suppressing device of intelligent plastic casing break Granted publication date: 20050706 License type: Exclusive license Record date: 20081112 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.6.12 TO 2013.6.11; CHANGE OF CONTRACT Name of requester: SHANGHAI DELIXI GROUP CO., LTD. Effective date: 20081112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050706 Termination date: 20150429 |
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| EXPY | Termination of patent right or utility model |