CN103077858A - Contact system of circuit breaker - Google Patents
Contact system of circuit breaker Download PDFInfo
- Publication number
- CN103077858A CN103077858A CN2013100163470A CN201310016347A CN103077858A CN 103077858 A CN103077858 A CN 103077858A CN 2013100163470 A CN2013100163470 A CN 2013100163470A CN 201310016347 A CN201310016347 A CN 201310016347A CN 103077858 A CN103077858 A CN 103077858A
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- Prior art keywords
- feeler lever
- movable feeler
- sliding pin
- guide surface
- contact
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- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 230000001934 delay Effects 0.000 claims description 15
- 230000003068 static effect Effects 0.000 abstract description 5
- 238000010891 electric arc Methods 0.000 description 6
- 238000001354 calcination Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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Abstract
The invention relates to a contact system of a circuit breaker. The contact system comprises a rotating shaft, a static feeler level, a movable feeler lever capable of rotating in the rotating shaft and a contact delay mechanism, wherein the contact delay mechanism comprises a sliding pin, springs are arranged on the two sides of the movable feeler lever, one end of each spring is connected with the sliding pin, and the other end of the spring is connected with the rotating shaft. The contact system is characterized in that the sliding pin is in linkage fit with the movable feeler lever, baffles are arranged on the two sides of the movable feeler lever, a first guide side and a second guide side are arranged on the sides, corresponding to the sliding pin, of the baffles, and a stop projection is arranged between the first guide side and the second guide side. According to the technical scheme, the invention provides the contact system of the circuit breaker. When current failures occur, the condition that the sliding pin cannot fall off is ensured, so that the contact delay mechanism can stably and reliably work.
Description
Technical field
The present invention relates to a kind of contact system of circuit breaker, when large fault current occured, it can fast cut-off circuit also guarantee not make again conducting of fault current, plays the current-limiting protection effect.
Background technology
The contact system of circuit breaker can be connected under the drive of operating mechanism or minute deenergizing; also be provided with release in the circuit breaker simultaneously, when overload or short circuit occur circuit, release can drive operating mechanism separates dynamic and static contact; cut off circuit, play the effect of protection.Yet the protective effect of release is limited; because the action of release is relatively slow, after the release action, also to dynamic and static contact be separated through a series of mechanical transfer process; for king-sized fault current, this reaction speed can't guarantee circuit safety.
The electrodynamic repulsion force that utilizes fault current to produce directly makes dynamic and static contact separate, and can reach the purpose of fast cut-off circuit, and this technology has obtained application in existing breaker contact system.After moving contact is scolded out, if operating mechanism does not also have enough time to move, moving contact may fall after rise under the effect of touch spring again, again and fixed contact form closure or between dynamic and static contact, produce electric arc, not only affect current limitation effect, also can cause the serious scaling loss of contact even melting welding occurs, make fault current damage load elements.Therefore, in this contact system, the mechanism that stops moving contact to fall after rise can be set all generally.
Such as Chinese invention patent ZL200810041566.3, a kind of contact system of circuit breaker is disclosed, comprise rotating shaft, have the stationary contact bar of sweep and the movable feeler lever that can in rotating shaft, rotate, it is characterized in that, this system comprises that also a contact delays mechanism, this contact delays mechanism and comprises: a pair of chute, be arranged at respectively the two ends of rotating shaft, and each chute comprises the first recess, the second recess and one section partes glabra between two recess; A sliding pin is installed in the rotating shaft movably, and its two ends lay respectively in the above-mentioned a pair of chute; A pair of spring is positioned at the both sides of movable feeler lever, and an end of spring hangs on the above-mentioned sliding pin, and the other end is fixedly connected in the rotating shaft; A draw-in groove is positioned at the back of movable feeler lever, connects respectively one section on the both sides of draw-in groove and promotes curved surface and one section and stop curved surface; When relatively rotating between movable feeler lever and the rotating shaft, described sliding pin can contact with the promotion curved surface of movable feeler lever and the first recess of chute simultaneously, perhaps contacts with the draw-in groove of movable feeler lever and the second recess of chute simultaneously.
But, the breaker contact system of this structure, when current failure occurs, because the spring force value of moving contact both sides can not be identical, meeting is so that certain inclination occurs to moving contact in the sliding pin two ends in scolding open procedure, and sliding pin one end can come off in chute, thereby so that this contact delays failure mechanisms, cause disappear serious scaling loss even melting welding occurs of moving contact pressure, so that fault current damages load elements.
Summary of the invention
Purpose of the present invention: in order to overcome the defective of prior art, the invention provides a kind of contact system of circuit breaker, when current failure occurs, can guarantee that sliding pin can not come off, thereby so that contact delays mechanism's working stability, reliable.
Technical scheme of the present invention: a kind of breaker contact system, include rotating shaft, the stationary contact bar, the movable feeler lever that can in rotating shaft, rotate, contact delays mechanism, described contact delays mechanism and includes sliding pin, described movable feeler lever both sides are provided with spring, described spring one end is connected with sliding pin, the other end is connected with rotating shaft, it is characterized in that: described sliding pin and movable feeler lever are linked, described movable feeler lever both sides are provided with dividing plate, corresponding sliding pin one side is provided with the first guide surface on the described dividing plate, the second guide surface is provided with between described the first guide surface and the second guide surface and stops projection.
Adopt technique scheme, when current failure occurs, described movable feeler lever, stationary contact bar are scolded out, and described sliding pin moves with movable feeler lever, and sliding pin moves to the second guide surface along the first guide surface, describedly stop that projection can hinder sliding pin and be moved to the first guide surface by the second guide surface, namely this stops that projection can form obstruction to the falling of movable feeler lever, even electric arc affects spring to the spring calcination, described sliding pin can not come off yet, thereby so that contact delays mechanism's working stability, reliable.
The further setting of the present invention: symmetrical structure centered by the described movable feeler lever, its symmetrical centre two ends are equipped with contact and delay mechanism.
Adopt above-mentioned further setting, the movable feeler lever scope of application of this structure is wide, reliable working performance.
Again further setting of the present invention: described movable feeler lever is provided with the draw-in groove that snaps in for sliding pin, described movable feeler lever both sides are provided with positioning drawing plate, described positioning drawing plate two ends are equipped with slotted hole, the contact that the slotted hole at described positioning drawing plate two ends is set in respectively the movable feeler lever both sides delays on the sliding pin in the mechanism, and described positioning drawing plate, movable feeler lever are coaxial hinged with dividing plate.
Adopt above-mentioned more further setting, the positioning drawing plate of setting can guarantee that sliding pin can move with movable feeler lever, and, can prevent well that sliding pin from coming off; Slotted hole on the positioning drawing plate can be reserved certain space to sliding pin, runs into when stopping projection at sliding pin like this, has the space of reservation to move.
Further setting of the present invention: described the first guide surface, the second guide surface are arc surface, the first guide surface, the isometrical setting of the second guide surface, and the first guide surface, the second guide surface and movable feeler lever centres arrange.
Adopt above-mentioned further setting, when spring is subject to electric arc influence, even sliding pin produces certain inclination, also can not affect the service behaviour that contact delays mechanism.
Again further setting of the present invention: form separate cavities between described dividing plate and the rotating shaft, described spring is arranged in the described separate cavities.
Adopt above-mentioned more further setting, by spring is arranged in the separate cavities, can prevent electric arc calcination spring, thereby can protect well spring, and then can guarantee the spring stable work in work.
Again further setting of the present invention: described dividing plate departs from sliding pin one side and is provided with recess, is arranged with alignment pin in the described recess, and described spring is connected an end and is articulated on the described alignment pin with rotating shaft.
Adopt above-mentioned more further setting, the spring connected mode of this structure, simple in structure, processing, easy for installation.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention;
Fig. 2 is specific embodiment of the invention shaft internal structure schematic diagram;
Fig. 3 is specific embodiment of the invention shaft structural representation;
Fig. 4 is positioning drawing plate structural representation in the specific embodiment of the invention;
Fig. 5 is movable feeler lever structural representation in the specific embodiment of the invention.
Embodiment
Such as Fig. 1,2, shown in 3, a kind of breaker contact system, include rotating shaft 1, stationary contact bar 2, can be at the movable feeler lever 3 of rotating shaft 1 interior rotation, contact delays mechanism 4, stationary contact bar 2 is provided with fixed contact 21, movable feeler lever 3 is provided with moving contact 31, described contact delays mechanism 4 and includes sliding pin 41, described movable feeler lever 3 both sides are provided with spring 42, described spring 42 1 ends are connected with sliding pin 41, the other end is connected with rotating shaft 1, described sliding pin 41 is linked with movable feeler lever 3, described movable feeler lever 3 both sides are provided with dividing plate 5, corresponding sliding pin 41 1 sides are provided with the first guide surface 51 on the described dividing plate 5, the second guide surface 52, be provided with between described the first guide surface 51 and the second guide surface 52 stop the projection 53.When current failure occurs, described movable feeler lever 3, stationary contact bar 2 are scolded out, described sliding pin 41 is with movable feeler lever 3 motions, sliding pin 41 moves to the second guide surface 52 along the first guide surface 51, described stop projection 53 can hinder sliding pin 41 by the second guide surface 52 to the motion of the first guide surface 51, namely this stops that projection 53 can form obstruction to the falling of movable feeler lever 3, even electric arc is to spring 42 calcinations, affect spring 42, described sliding pin 41 can not come off yet, thereby so that contact delays mechanism's working stability, reliable.
Shown in Fig. 1,2,3,4,5, in the specific embodiment of the invention, symmetrical structure centered by the described movable feeler lever 3, its symmetrical centre two ends are equipped with contact and delay mechanism 4, described movable feeler lever 3 is provided with the draw-in groove 32 that snaps in for sliding pin 41, described movable feeler lever 3 both sides are provided with positioning drawing plate 6, described positioning drawing plate 6 two ends are equipped with slotted hole 61, the contact that the slotted hole 61 at described positioning drawing plate 6 two ends is set in respectively movable feeler lever 3 both sides delays on the sliding pin 41 in the mechanism 4, and described positioning drawing plate 6, movable feeler lever 3 are coaxial hinged with dividing plate 5.
As shown in Figure 1, 2, 3, in the specific embodiment of the invention, described the first guide surface 51, the second guide surface 52 are arc surface, the first guide surface 51, the 52 isometrical settings of the second guide surface, the centres setting of the first guide surface 51, the second guide surface 52 and movable feeler lever 3.
As shown in Figure 2, in the specific embodiment of the invention, form separate cavities 7 between described dividing plate 5 and the rotating shaft 1, described spring 42 is arranged in the described separate cavities 7.By spring 42 is arranged in the separate cavities 7, can prevents electric arc calcination spring 42, thereby can protect well spring 42, and then can guarantee spring 42 stable work in work.
As shown in Figure 2, in the specific embodiment of the invention, described dividing plate 5 departs from sliding pin 41 1 sides and is provided with recess 54, is arranged with alignment pin 8 in the described recess 54, and described spring 42 is connected an end and is articulated on the described alignment pin 8 with rotating shaft 1.
Claims (6)
1. breaker contact system, include rotating shaft, stationary contact bar, the movable feeler lever that can in rotating shaft, rotate, contact and delay mechanism, described contact delays mechanism and includes sliding pin, described movable feeler lever both sides are provided with spring, described spring one end is connected with sliding pin, the other end is connected with rotating shaft, it is characterized in that: described sliding pin and movable feeler lever are linked, described movable feeler lever both sides are provided with dividing plate, corresponding sliding pin one side is provided with the first guide surface, the second guide surface on the described dividing plate, is provided with between described the first guide surface and the second guide surface to stop projection.
2. breaker contact system according to claim 1, it is characterized in that: symmetrical structure centered by the described movable feeler lever, its symmetrical centre two ends are equipped with contact and delay mechanism.
3. breaker contact system according to claim 2, it is characterized in that: described movable feeler lever is provided with the draw-in groove that snaps in for sliding pin, described movable feeler lever both sides are provided with positioning drawing plate, described positioning drawing plate two ends are equipped with slotted hole, the contact that the slotted hole at described positioning drawing plate two ends is set in respectively the movable feeler lever both sides delays on the sliding pin in the mechanism, and described positioning drawing plate, movable feeler lever are coaxial hinged with dividing plate.
4. breaker contact system according to claim 3, it is characterized in that: described the first guide surface, the second guide surface are arc surface, the first guide surface, the isometrical setting of the second guide surface, the first guide surface, the second guide surface and movable feeler lever centres arrange.
5. according to claim 1 and 2 or 3 or 4 described breaker contact systems, it is characterized in that: form separate cavities between described dividing plate and the rotating shaft, described spring is arranged in the described separate cavities.
6. breaker contact system according to claim 5, it is characterized in that: described dividing plate departs from sliding pin one side and is provided with recess, is arranged with alignment pin in the described recess, and described spring is connected an end and is articulated on the described alignment pin with rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016347.0A CN103077858B (en) | 2013-01-16 | 2013-01-16 | Contact system of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310016347.0A CN103077858B (en) | 2013-01-16 | 2013-01-16 | Contact system of circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103077858A true CN103077858A (en) | 2013-05-01 |
| CN103077858B CN103077858B (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310016347.0A Active CN103077858B (en) | 2013-01-16 | 2013-01-16 | Contact system of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103077858B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296276A (en) * | 1999-11-03 | 2001-05-23 | Aeg低压技术股份有限两合公司 | Rotary contact mechanism for circuit breaker |
| CN1750206A (en) * | 2004-04-16 | 2006-03-22 | Ls产电株式会社 | Movable contact assembly of circuit breaker for wiring |
| CN101882546A (en) * | 2010-06-25 | 2010-11-10 | 江苏大全凯帆电器有限公司 | Rotating shaft clamping mechanism |
| CN102403171A (en) * | 2011-11-21 | 2012-04-04 | 科都电气有限公司 | Contact structure for molded case circuit breaker and molded case circuit breaker using the same |
| CN203055820U (en) * | 2013-01-16 | 2013-07-10 | 创奇科技有限公司 | Contact system of circuit breaker |
-
2013
- 2013-01-16 CN CN201310016347.0A patent/CN103077858B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296276A (en) * | 1999-11-03 | 2001-05-23 | Aeg低压技术股份有限两合公司 | Rotary contact mechanism for circuit breaker |
| CN1750206A (en) * | 2004-04-16 | 2006-03-22 | Ls产电株式会社 | Movable contact assembly of circuit breaker for wiring |
| CN101882546A (en) * | 2010-06-25 | 2010-11-10 | 江苏大全凯帆电器有限公司 | Rotating shaft clamping mechanism |
| CN102403171A (en) * | 2011-11-21 | 2012-04-04 | 科都电气有限公司 | Contact structure for molded case circuit breaker and molded case circuit breaker using the same |
| CN203055820U (en) * | 2013-01-16 | 2013-07-10 | 创奇科技有限公司 | Contact system of circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103077858B (en) | 2015-07-08 |
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| C06 | Publication | ||
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Effective date of registration: 20180720 Address after: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee after: ZHEJIANG CHUANGQI ELECTRIC Co.,Ltd. Address before: 325000 No. 18, Sha Hung Road, North white elephant Town, Yueqing City, Wenzhou, Zhejiang. Patentee before: CHAC TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee after: Zhejiang Chuangqi Electric Co.,Ltd. Address before: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee before: ZHEJIANG CHUANGQI ELECTRIC Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |