CN102044388B - Static contact structure of moulded case circuit breaker - Google Patents
Static contact structure of moulded case circuit breaker Download PDFInfo
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- CN102044388B CN102044388B CN 201110007148 CN201110007148A CN102044388B CN 102044388 B CN102044388 B CN 102044388B CN 201110007148 CN201110007148 CN 201110007148 CN 201110007148 A CN201110007148 A CN 201110007148A CN 102044388 B CN102044388 B CN 102044388B
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Abstract
The invention discloses a static contact structure of a moulded case circuit breaker. The left end of a static conducting rod is a current line incoming end, the right end is a current line outgoing end, and is bent left to form a bent pin, and the upper surface of the bent pin is fixedly connected with a sliver contact; the middle of the static conducting rod is provided with a rip part which isbent left to form an arc striking grid; the arc striking grid approaches to the sliver contact and is positioned on the lower end of an arc extinction grid, and the upper part of the arc striking grid is parallel to the arc extinction grid; one part of the static conducting rod serves as the arc striking grid to avoid the process of installing the arc striking grid in an arc extinction chamber; after the arc striking grid is bent, the arc striking grid is parallel to the angle of the arc extinction grid in the arc extinction chamber, which is favourable for the arc to enter the arc extinctionchamber; a metal plate can enhance a magnetic field so as to attract the arc; and after an arc root skips to the arc striking grid from the static contact, the arc striking grid can continue to bear larger short circuit current, improves the arc extinction effect, prevents the arc from burning on the static contact, and ensures that a breaker has good capability on switching on and off.
Description
Technical field
The present invention relates to a kind of breaker of plastic casing, be specifically related to the static contact structure of breaker of plastic casing, belong to the low-voltage electrical technical field.
Background technology
The fixed contact of existing breaker of plastic casing comprises that static conductive rod and the silver contact made by silver-plated copper billet form.When circuit breaker cut-offs, the dynamic and static contact of the contact apparatus of breaker of plastic casing is scolded when holding can produce electric arc, because the contact moving line of moving contact is in the cavity volume of the arc extinguishing grid pieces of arc-control device, therefore electric arc enters arc extinguishing grid pieces under electrodynamic action, electric arc is cut into the short arc of a series of series connection, electric arc is attenuated and improve fast arc voltage, thereby reach the effect of arc extinguishing.In this course, the effect of fixed contact striking grid sheet is important, if the reliable equipotential of striking grid sheet and fixed contact then can make the arc root of electric arc one utmost point transfer to like a cork on the striking pin grid sheet, reduce the arc root in the stop of fixed contact, also reduce electric arc to the scaling loss of fixed contact.At present fixed contact striking grid sheet commonly used general the same with other arc extinguishing grid pieces be installed on arc control device interior after, utilize its position near fixed contact, to reaching the equipotential effect of striking grid sheet and fixed contact, and actual be that the position is close, not being reliable contact, is not reliable equipotential therefore; Also have striking grid sheet rivet welding on fixed contact, riveted joint seems reliably and contacts, but riveted joint face is after all little, and contact resistance is large, is unfavorable for drainage, and has also increased the operation of rivet welding at fit on.
Summary of the invention
The static contact structure with striking grid sheet and fixed contact group all-in-one-piece breaker of plastic casing that the purpose of this invention is to provide a kind of reliable in structure, easy for installation and function admirable.
The technical solution used in the present invention is: the present invention includes static conductive rod and the silver contact of U-shaped structure, the static conductive rod left end is that electric current end of incoming cables, right-hand member are that electric current leading-out terminal and right-hand member place are bent into a bending leg left, and the bending leg upper surface is connected with silver contact; The static conductive rod mid portion has a tearing notch part, and the bending left of tearing notch part forms striking grid sheet, striking grid sheet near silver contact and be positioned at the lower end of arc extinguishing grid pieces and the upper part of striking grid sheet parallel with arc extinguishing grid pieces.
Further, have a groove on the static conductive rod in striking grid sheet left side, be close to the iron plate that a structure matches on the left surface of striking grid sheet, the bottom of iron plate is extended a boss left, and boss and groove match; Another boss is extended at the top of iron plate to the right, and the open slot on another boss and the striking grid sheet end face matches.
The invention has the beneficial effects as follows:
1, with the part of static conductive rod as striking grid sheet, avoided installing in the arc control device process of striking grid sheet; Parallel with the arc extinguishing grid pieces angle in the arc control device after the bending of striking grid sheet, be conducive to electric arc and enter arc control device; The rounding off face of striking grid sheet bending leg be conducive to electric arc from the fixed contact fast transfer to striking grid sheet;
The iron plate of 2, riveting on the striking grid sheet can strengthen magnetic field, to attract electric arc, the arc root is after jumping on the striking grid sheet from fixed contact, striking grid sheet can continue to carry larger short circuit current, strengthen arc quenching effect, can avoid electric arc in the burning of fixed contact place, thereby be ensured that circuit breaker has good connecting-disconnecting function.
Description of drawings
Fig. 1 is structure chart of the present invention;
Fig. 2 is the structure chart of static conductive rod 1 among Fig. 1;
Fig. 3 is the structure enlarged drawing of iron plate 3 among Fig. 1;
Among the figure: 1. static conductive rod; 2. silver contact; 3. iron plate; 4. arc extinguishing grid pieces; 11. striking grid sheet; 12. groove; 13. bending leg; 31,32. boss; 111. open slot; A. bending angle.
Embodiment
Referring to Fig. 1-2, the present invention includes electroplate static conductive rod 1 and silver contact 2, wherein, static conductive rod 1 is U-shaped structure, the left end of static conductive rod 1 is the electric current end of incoming cables, right-hand member is the electric current leading-out terminal, and the electric current leading-out terminal place of right-hand member is bent into a bending leg 13 left, at the fixing silver contact 2 of the upper surface of bending leg 13.
At the mid portion of static conductive rod 1 left a tearing notch part is arranged, the bending left of tearing notch part forms striking grid sheet 11, striking grid sheet 11 is arranged in the lower end of the arc extinguishing grid pieces 4 of arc control device, be that striking grid sheet 11 is to the direction bending of electric current end of incoming cables, the magnetic field that produces of current direction in the striking grid sheet 11 is conducive to produce the electric arc power of (namely to arc extinguishing grid pieces 4 roots) motion left that attracts like this, and the arrow shown in Fig. 1 is that electric current is through the flow direction of striking grid sheet 11.The bending part of striking grid sheet 11 is arc surface, makes striking grid sheet 11 as far as possible near silver contact 2.Be provided with an open slot 111 at striking grid sheet 11 end faces.Requirement to the bending angle a of striking grid sheet 11 is: make after 11 bendings left of striking grid sheet on it part parallel with the arc extinguishing grid pieces 4 in being installed in arc control device; the electric arc that is conducive to like this on the static conductive rod 1 is transferred on the striking grid sheet 11 with comparalive ease; can reduce electric arc to the scaling loss of silver contact 2, protect simultaneously silver contact 2.
Referring to Fig. 1-3, the static conductive rod 1 in striking grid sheet 11 left sides has a groove 12; Be close to the iron plate 3 that a structure matches at the left surface of striking grid sheet 11, namely iron plate 3 also is bent into the structure of bending angle a, and striking grid sheet 11 is fixing by riveted joint with iron plate 3.The bottom of iron plate 3 is extended a boss 32 left, and boss 32 matches fixing with groove 12 on the static conductive rod 1, with reliable location iron plate 3, prevents that iron plate 3 riveted joint posterior ends from upwards lifting.Another boss 31 is extended at the top of iron plate 3 to the right, and another boss 31 matches fixing with open slot 111 on striking grid sheet 11 end faces.During installation, iron plate 3 is riveted in the open slot 111 on striking grid sheet 11 end faces, can fits tightly with striking grid sheet 11.Fixed iron piece 3 can strengthen magnetic field on striking grid sheet 11, attracts electric arc, makes the arc root jump on the striking grid sheet 11 from silver contact 2 after, and striking grid sheet 11 can also continue to carry larger short circuit current, strengthens arc quenching effect.
Striking grid sheet 11 of the present invention is the part of static conductive rod 1, so striking grid sheet 11 is reliable equipotential with static conductive rod 1.When circuit breaker cut-offs, thereby electric arc can low weight loose ground be jumped onto striking grid sheet 11 and is entered into arc control device.When electric arc pulls open, because silver contact 2 and striking grid sheet 11 equipotentials, arc root on the silver contact 2 is transferred on the striking grid sheet 11 at an easy rate, between static conductive rod 1 end of incoming cables, striking grid sheet 11, arc extinguishing grid pieces 4, moving contact, form current circuit successively, the electric arc on silver contact 2 surfaces is shifted rapidly, avoid electric arc in silver contact 2 burnings, thereby ensured that circuit breaker has good connecting-disconnecting function.
Claims (3)
1. the static contact structure of a breaker of plastic casing, the static conductive rod (1) and the silver contact (2) that comprise U-shaped structure, it is characterized in that: static conductive rod (1) left end is that electric current end of incoming cables, right-hand member are that electric current leading-out terminal and right-hand member place are bent into a bending leg (13) left, and bending leg (13) upper surface is connected with silver contact (2); Static conductive rod (1) mid portion has a tearing notch part, the bending left of tearing notch part forms striking grid sheets (11), striking grid sheet (11) near silver contact (2) and be positioned at the lower end of arc extinguishing grid pieces (4) and the upper part of striking grid sheet (11) parallel with arc extinguishing grid pieces (4).
2. the static contact structure of a kind of breaker of plastic casing according to claim 1, it is characterized in that: have a groove (12) on the static conductive rod (1) in striking grid sheet (11) left side, be glued with the iron plate (3) that a structure matches on the left surface of striking grid sheet (11), the bottom of iron plate (3) is extended with a boss (32) left, and boss (32) matches with groove (12); The top of iron plate (3) is extended with another boss (31) to the right, establishes an open slot (111) that matches with another boss (31) on striking grid sheet (11) end face.
3. the static contact structure of a kind of breaker of plastic casing according to claim 1, it is characterized in that: the bending part of striking grid sheet (11) is arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110007148 CN102044388B (en) | 2011-01-14 | 2011-01-14 | Static contact structure of moulded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110007148 CN102044388B (en) | 2011-01-14 | 2011-01-14 | Static contact structure of moulded case circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102044388A CN102044388A (en) | 2011-05-04 |
| CN102044388B true CN102044388B (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110007148 Active CN102044388B (en) | 2011-01-14 | 2011-01-14 | Static contact structure of moulded case circuit breaker |
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| CN (1) | CN102044388B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280324A (en) * | 2011-05-23 | 2011-12-14 | 镇江泰丰电工设备制造有限公司 | Contact used for high-voltage circuit breaker |
| CN102543593B (en) * | 2012-03-08 | 2014-06-04 | 江苏辉能电气有限公司 | Method for mounting rotating shaft of molded case circuit breaker |
| CN109559947B (en) * | 2017-09-27 | 2020-11-27 | 常熟开关制造有限公司(原常熟开关厂） | Multi-pole circuit breaker |
| CN108597941A (en) * | 2018-07-18 | 2018-09-28 | 环宇集团浙江高科股份有限公司 | A kind of breaker of plastic casing static contact arc eliminating module |
| CN109013909A (en) * | 2018-09-19 | 2018-12-18 | 上海晨昌精密模具有限公司 | A kind of hollow part pneumatics bending and molding class progressive die |
| CN109616390B (en) * | 2018-12-28 | 2021-10-26 | 天津京人电器有限公司 | Multi-pole switch |
| CN109494133A (en) * | 2019-01-09 | 2019-03-19 | 常熟开关制造有限公司(原常熟开关厂） | A kind of contact structure of breaker |
| CN110034000A (en) * | 2019-05-08 | 2019-07-19 | 宁夏力成电气集团有限公司 | A kind of striking static contact and its breaker of plastic casing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61133528A (en) * | 1984-11-30 | 1986-06-20 | 三菱電機株式会社 | Circuit breaker |
| CN1288691C (en) * | 2003-09-15 | 2006-12-06 | 正泰集团股份有限公司 | A static contact panel of plastic shell circuit breaker |
| CN2731692Y (en) * | 2004-05-24 | 2005-10-05 | 通用电气公司 | Circuit breaker |
| CN101853751A (en) * | 2009-11-20 | 2010-10-06 | 大全集团有限公司 | Arc extinguishing system of circuit breaker |
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2011
- 2011-01-14 CN CN 201110007148 patent/CN102044388B/en active Active
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| CN102044388A (en) | 2011-05-04 |
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Effective date of registration: 20220516 Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. Address before: 212132 mechanical and Electrical Industrial Park, Dagang East Road, Dagang District, Zhenjiang, Jiangsu A5 Patentee before: Jiangsu Phono Electric Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Eaton Huineng low voltage electrical appliances (Jiangsu) Co.,Ltd. Address before: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee before: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. |