CN211788889U - Miniature circuit breaker striking structure based on step electric field distribution - Google Patents
Miniature circuit breaker striking structure based on step electric field distribution Download PDFInfo
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- CN211788889U CN211788889U CN202020447468.6U CN202020447468U CN211788889U CN 211788889 U CN211788889 U CN 211788889U CN 202020447468 U CN202020447468 U CN 202020447468U CN 211788889 U CN211788889 U CN 211788889U
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- conducting rod
- arc striking
- circuit breaker
- contact
- convex arc
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- 230000005684 electric field Effects 0.000 title claims abstract description 22
- 230000003068 static effect Effects 0.000 claims description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 238000002679 ablation Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The invention relates to a miniature circuit breaker arc striking structure based on step electric field distribution, which comprises a moving contact, a fixed contact, a moving conducting rod, a fixed conducting rod and a convex arc striking piece, wherein the distance between the convex arc striking piece and the fixed conducting rod is 50-150% of the distance between the moving contact and the fixed contact; the arc striking scheme provided by the invention utilizes the comprehensive effect of electric field enhancement caused by the arc voltage between the convex arc striking piece and the conducting rod and gas electric strength reduction caused by arc hot gas, can avoid the defect that the traditional method only depends on the current magnetic field of the traditional method, realizes the rapid transfer of the arc, reduces the ablation of the contact material of the circuit breaker, and effectively prolongs the electric service life of the circuit breaker.
Description
Technical Field
The invention relates to the technical field of miniature circuit breakers, in particular to an arc striking structure of a miniature circuit breaker based on step electric field distribution.
Background
The miniature circuit breaker is an important control and protection device in a low-voltage distribution system, and can quickly detect faults and cut off fault current when the distribution system has faults such as overload, short circuit and the like, so that the safety of the distribution system and the equipment is protected. At the in-process of circuit breaker breaking current, the circuit breaker is inside will produce electric arc plasma, and then inevitably can produce the ablation to circuit breaker contact material, influence circuit breaker electric life, consequently, how to strike the arc fast and reduce the ablation of electric arc to contact material, is the key technical problem of circuit breaker structural optimization and promotion electric life.
The commonly used arc striking structure mostly adopts a specially designed contact structure to enable the electric arc to move towards the arc striking plate under the action of a magnetic field generated by the current of the electric arc, or adopts a gas generating material arranged in the arc extinguishing chamber to drive the electric arc by utilizing the blowing action generated by the ablation of the electric arc, so as to realize the rapid transfer of the electric arc. However, in the case of breaking a small current or requiring faster arc transfer, it is difficult to achieve efficient, fast transfer of the arc by means of only conventional design methods.
Disclosure of Invention
Technical problem to be solved
In view of the defects in the prior art and the needs, the invention provides the miniature circuit breaker arc striking structure based on the step electric field distribution, which can avoid the defect that the traditional method only depends on the current magnetic field of the miniature circuit breaker, realize the rapid transfer of the electric arc, reduce the ablation of the contact material of the circuit breaker and effectively prolong the electric service life of the circuit breaker.
Technical scheme
A miniature circuit breaker arc striking structure based on step electric field distribution is characterized by comprising a moving contact, a fixed contact, a moving conducting rod, a fixed conducting rod and a convex arc striking piece; the moving contact is fixedly connected to the moving conducting rod; the static contact is fixedly connected to the static conducting rod; the convex arc striking piece is connected with the movable conducting rod or the static conducting rod and keeps the same potential; the convex arc striking piece is made of a metal conductive material; when the convex arc striking piece is connected with the movable conducting rod, the minimum distance between the convex arc striking piece and the static conducting rod is 50-150% of the distance between the movable contact and the static contact; when the convex arc striking piece is connected with the static conducting rod, the minimum distance between the convex arc striking piece and the static conducting rod is 50-150% of the distance between the movable contact and the static contact.
The convex arc striking piece and the movable conducting rod are integrated, and a convex structure towards the direction of the static conducting rod is formed by bending the movable conducting rod.
The convex arc striking piece is of a cylindrical structure and is connected with the movable conducting rod in a welding mode, a rivet mode or a screw mode.
The convex arc striking piece is arranged below the moving contact and is connected with the moving conducting rod in a copper bar, lead or flexible connection mode.
Advantageous effects
The invention provides a miniature circuit breaker arc striking structure based on step electric field distribution, which utilizes the comprehensive effect of electric field enhancement caused by arc voltage between a convex arc striking piece and a static conducting rod and gas electric strength reduction caused by arc hot gas, can avoid the defect that the traditional method only depends on the current magnetic field of the traditional method, realizes the quick transfer of electric arc, reduces the ablation of a circuit breaker contact material, and effectively prolongs the electric service life of a circuit breaker.
Drawings
Fig. 1 is a schematic closing state diagram of an arc striking structure of a miniature circuit breaker based on a step electric field distribution according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of an opening state of an arc striking structure of a miniature circuit breaker based on a step electric field distribution according to embodiment 1 of the present invention.
Fig. 3 is a schematic closing state diagram of an arc striking structure of a miniature circuit breaker based on a step electric field distribution according to embodiment 2 of the present invention.
Fig. 4 is a schematic view of an opening state of an arc striking structure of a miniature circuit breaker based on a step electric field distribution according to embodiment 2 of the present invention.
Fig. 5 is a schematic closing state diagram of an arc striking structure of a miniature circuit breaker based on a step electric field distribution according to embodiment 3 of the present invention.
Fig. 6 is a schematic view of an opening state of an arc striking structure of a miniature circuit breaker based on a step electric field distribution according to embodiment 3 of the present invention.
The arc striking device comprises a moving contact 1, a moving contact 2, a static contact 3, a moving conducting rod 4, a static conducting rod 5 and a convex arc striking part.
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
a miniature circuit breaker arc striking structure based on step electric field distribution comprises a moving contact 1, a static contact 2, a moving conducting rod 3, a static conducting rod 4 and a convex arc striking piece 5;
the moving contact 1 is fixedly connected to the moving conducting rod 3;
the static contact 2 is fixedly connected to the static conducting rod 4;
the convex arc striking piece 5 is connected with the movable conducting rod 3 and keeps the same potential;
further, the convex arc striking piece 5 is connected with the movable conducting rod 3 or the static conducting rod 4 and keeps the same potential;
further, when the convex arc striking piece 5 is connected with the movable conducting rod 3, the minimum distance between the convex arc striking piece 5 and the static conducting rod 4 is 50% -150% of the distance between the movable contact 1 and the static contact 2; when the convex arc striking piece 5 is connected with the static conducting rod 4, the minimum distance between the convex arc striking piece 5 and the movable conducting rod 3 is 50-150% of the distance between the movable contact 1 and the static contact 2;
further, the material of the convex arc ignition piece 5 is a metal conductive material.
According to the arc striking structure of the miniature circuit breaker based on the step electric field distribution, in the process of breaking an electric arc of the miniature circuit breaker, the moving contact 1 is separated from the static contact 2, an electric arc is generated between the moving contact and the static contact, the electric field between the convex arc striking part 5 and the static conducting rod 4 is increased due to the arc voltage, meanwhile, hot air generated by the electric arc enters the region between the convex arc striking part 5 and the static conducting rod 4, the electric resistance of the region is reduced, when the arc voltage exceeds the electric resistance between the convex arc striking part 5 and the static conducting rod 4, gap breakdown occurs between the convex arc striking part 5 and the static conducting rod 4, the electric arc is rapidly transferred from the region between the moving contact 1 and the static contact 2 to the region between the convex arc striking part 5 and the static conducting rod 4, and the purposes of rapidly transferring the electric arc and reducing ablation of contact.
In a preferred embodiment 1, the convex arc striking piece 5 is integrated with the movable conducting rod 3, and a convex structure towards the direction of the static conducting rod 4 is formed by bending the movable conducting rod 3;
in another preferred embodiment 2, the convex arc striking piece 5 is of a cylindrical structure and is connected with the movable conducting rod 3 through welding, rivets or screws;
in another preferred embodiment 3, the convex arc striking member 5 is disposed below the movable contact, the distance between the convex arc striking member and the static conductive rod is 50% to 150% of the distance between the movable contact and the static contact, and the convex arc striking member is connected to the movable conductive rod 3 by a copper bar, a wire or a flexible connection.
The above-described embodiments are merely intended to illustrate the objects and technical features of the present invention, and do not limit the contents thereof. It is intended that the present invention cover such alternatives, modifications and variations as may be included within the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A miniature circuit breaker arc striking structure based on step electric field distribution is characterized by comprising a moving contact (1), a static contact (2), a moving conducting rod (3), a static conducting rod (4) and a convex arc striking piece (5); the moving contact (1) is fixedly connected to the moving conducting rod (3); the static contact (2) is fixedly connected to the static conducting rod (4); the convex arc striking piece (5) is connected with the movable conducting rod (3) or the static conducting rod (4) and keeps the same potential; the convex arc striking piece (5) is made of a metal conductive material; when the convex arc striking piece (5) is connected with the movable conducting rod (3), the minimum distance between the convex arc striking piece (5) and the static conducting rod (4) is 50-150% of the distance between the movable contact (1) and the static contact (2); when the convex arc striking piece (5) is connected with the static conducting rod (4), the minimum distance between the convex arc striking piece (5) and the dynamic conducting rod (3) is 50% -150% of the distance between the dynamic contact (1) and the static contact (2).
2. The miniature circuit breaker arc striking structure based on step electric field distribution as claimed in claim 1, characterized in that said convex arc striking member (5) is integrated with the movable conducting rod (3), and is bent by the movable conducting rod (3) to form a convex structure toward the direction of the stationary conducting rod (4).
3. The miniature circuit breaker arc ignition structure based on step electric field distribution as claimed in claim 1, wherein said convex arc ignition member (5) is a cylindrical structure, and is connected with the movable conducting rod (3) by welding, rivet or screw.
4. The arc striking structure of a miniature circuit breaker based on the stepped electric field distribution as claimed in claim 1, wherein said convex arc striking member (5) is disposed below the moving contact (1) and connected to the moving conductive rod (3) through copper bar and wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020447468.6U CN211788889U (en) | 2020-03-31 | 2020-03-31 | Miniature circuit breaker striking structure based on step electric field distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020447468.6U CN211788889U (en) | 2020-03-31 | 2020-03-31 | Miniature circuit breaker striking structure based on step electric field distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211788889U true CN211788889U (en) | 2020-10-27 |
Family
ID=72927547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020447468.6U Active CN211788889U (en) | 2020-03-31 | 2020-03-31 | Miniature circuit breaker striking structure based on step electric field distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211788889U (en) |
-
2020
- 2020-03-31 CN CN202020447468.6U patent/CN211788889U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220125 Address after: 325600 leshang entrepreneurship Park, yueqingwan port area, Wenzhou City, Zhejiang Province (in Yueqing developed technology Co., Ltd.) Patentee after: ZHEJIANG CHANGYOU ELECTRIC CO.,LTD. Address before: 325600 road 222, Weiwu Road, Yueqing Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: ZHEJIANG LINGYI INTELLIGENT ELECTRIC APPLIANCE RESEARCH INSTITUTE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325600 leshang entrepreneurship Park, yueqingwan port area, Wenzhou City, Zhejiang Province (in Yueqing developed technology Co., Ltd.) Patentee after: Zhejiang Changyou Electric Co.,Ltd. Address before: 325600 leshang entrepreneurship Park, yueqingwan port area, Wenzhou City, Zhejiang Province (in Yueqing developed technology Co., Ltd.) Patentee before: ZHEJIANG CHANGYOU ELECTRIC CO.,LTD. |