CN213340264U - Static contact of circuit breaker - Google Patents
Static contact of circuit breaker Download PDFInfo
- Publication number
- CN213340264U CN213340264U CN202022685098.2U CN202022685098U CN213340264U CN 213340264 U CN213340264 U CN 213340264U CN 202022685098 U CN202022685098 U CN 202022685098U CN 213340264 U CN213340264 U CN 213340264U
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- static contact
- arc
- striking
- circuit breaker
- contact
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Abstract
The utility model relates to a circuit breaker static contact. The to-be-solved technical problem of the utility model is to provide a circuit breaker static contact that striking is effectual, long service life. The utility model discloses a technical scheme including static contact and stationary contact, the static contact includes static contact body and supplementary arc ignition piece, the static contact body includes static contact board somatic part, and static contact board somatic part tip bends through the blanking and forms corresponding static contact arc ignition portion and branch sprue, and static contact arc ignition portion is including the striking connecting portion, circular arc transition portion and the striking head that connect gradually, the striking connecting portion with static contact board somatic part connects, is equipped with on the striking head the stationary contact, the overhead and being close to of striking the both sides of stationary contact are equipped with the circular arc notch, and the both ends of branch sprue are equipped with the striking piece installing port, and supplementary arc ignition piece is U type structure. The utility model has the advantages that: the structure is simple, the arc striking effect is good, the arc striking effect and the reliability of the static contact are improved, and the service life of the static contact is prolonged.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to circuit breaker static contact.
Background
The molded case circuit breaker can automatically cut off a power supply after the current exceeds a trip setting, and an electromagnetic system of the circuit breaker is provided with a movable contact and a fixed contact which can be used for connecting or breaking a circuit. When the moving contact and the static contact of the circuit breaker are disconnected, the contact point of the moving contact and the static contact can generate high-temperature electric arc at the moment of separation, and the high-temperature electric arc moves towards the direction of an arc extinguishing system (grid) under the action of a magnetic field, and is finally cooled and extinguished in the arc extinguishing system. In order to introduce an arc into the arc chute, a magnetic blow method is generally employed, i.e. the current loop is arranged such that the magnetic field it generates and the arc current interact to force the arc into the arc chute. Because there is certain clearance between explosion chamber and the static contact, at the in-process of explosion chamber gas-blast arc extinguishing, some gas towards these clearance motion, lead to whole explosion chamber gas-blast pressure drop, be unfavorable for improving the arc extinguishing performance of circuit breaker. In addition, if the electric arc can not be introduced into the arc extinguish chamber in time, the electric arc overflows from four positions between the moving contact and the static contact, and when the electric arc flows into each part of the static contact, the electric arc can be burnt. Therefore, the problem that how to reduce the arc corrosion and loss of the static contact while improving the arc striking performance of the static contact becomes the urgent need to be solved by the static contact.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the to-be-solved technical problem of the utility model is to provide a circuit breaker static contact that the striking is effectual, long service life.
The utility model discloses technical scheme that the static contact of circuit breaker adopted includes the static contact and establishes the static contact on the static contact, its characterized in that: the static contact comprises a static contact body and an auxiliary arc-striking block arranged on the static contact body, the static contact body comprises a static contact plate body, the end part of the static contact plate body forms a corresponding static contact arc-leading part and a corresponding shunt opening through blanking and bending, the static contact arc ignition part is arranged right above the shunting port and comprises an arc ignition connecting part, an arc transition part and an arc ignition head which are sequentially connected, the arc striking connecting part is connected with the static contact plate body, the static contact is arranged on the arc striking head, arc notches are arranged on the two sides of the arc striking head close to the stationary contact, arc striking block mounting ports are arranged at the two ends of the shunting port, the auxiliary arc striking block is of a U-shaped structure, the auxiliary arc ignition block is arranged in the arc ignition block mounting hole, the auxiliary arc ignition block is provided with an arc ignition block connecting hole, and the arc ignition head is provided with an arc ignition block mounting hole corresponding to the arc ignition block connecting hole.
The other end of the static contact plate body is provided with a first through hole and a second through hole, and the diameter of the first through hole is larger than that of the second through hole.
The arc striking head is obliquely and obliquely arranged in an inclined mode.
The shunt port comprises a square shunt port and a triangular shunt port, the square shunt port is communicated with the triangular shunt port, the square shunt port is close to the static contact arc-leading part, and the triangular shunt port is far away from the static contact arc-leading part.
And a boss is arranged at one end of the static contact plate body, which is close to the static contact arc ignition part, the upper end surface and the lower end surface of the boss are respectively flush with the upper end surface and the lower end surface of the static contact plate body, and the width of the boss is smaller than that of the static contact plate body.
The static contact is of a square structure.
The utility model discloses the advantage of circuit breaker static contact lies in: 1, the auxiliary arc striking block can disperse the electric arc, has simple structure and good arc striking effect, reduces the burning of the electric arc on a static contact, and improves the arc striking effect and the reliability of the static contact; the design of the 2 arc notches enables the current density near the static contact to be increased, the magnetic blow-off force near the contact to be enhanced, the arc can be blown off by the larger magnetic blow-off force, the burning time of the arc on the static contact is shortened, and the service life of the static contact is prolonged.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural view of a fixed contact of the circuit breaker of the present invention;
fig. 2 is a schematic structural view of the static contact of the present invention;
fig. 3 is a schematic front structural view of the static contact body of the present invention;
FIG. 4 is a schematic structural view of the auxiliary arc-striking block of the present invention;
fig. 5 is a schematic view of the back structure of the static contact body of the present invention.
Detailed Description
As shown in fig. 1-5, the static contact of the circuit breaker related to in the present invention comprises a static contact 1 and a static contact 2 disposed on the static contact 1, wherein the static contact 1 comprises a static contact body 3 and an auxiliary arc-striking block 4 disposed on the static contact body 3, the static contact body 3 comprises a static contact body 6, the end of the static contact body 6 is formed into a corresponding static contact arc-striking portion 7 and a branch opening 8 by punching and bending, the static contact arc-striking portion 7 is disposed right above the branch opening 8, the static contact arc-striking portion 7 comprises an arc-striking connecting portion 10, an arc transition portion 11 and an arc-striking head 12 connected in sequence, the arc-striking connecting portion 10 is connected with the static contact body 6, the arc-striking head 12 is provided with the static contact 2, the arc-striking head 12 is provided with arc notches 14 on two sides close to the static contact 2, two ends of the branch opening 8 are provided with arc-striking block mounting openings 16, the auxiliary arc ignition block 4 is of a U-shaped structure and is arranged in the arc ignition block mounting hole 16, an arc ignition block connecting hole 17 is formed in the auxiliary arc ignition block 4, and an arc ignition block mounting hole 15 corresponding to the arc ignition block connecting hole 17 is formed in the arc ignition head 12.
The design of supplementary arc striking piece 4 can be dispersed electric arc, and simple structure and striking are effectual, and in the arc extinguishing chamber with electric arc guide circuit breaker effectively, reduce the burning of electric arc on the stationary contact, improve the striking effect and the reliability of stationary contact.
When the current passes through the arc notch 14, the current density near the stationary contact is increased due to the design of the arc notch 14, so that the magnetic blowing force near the contact is enhanced, the arc can be blown away by the larger magnetic blowing force, the burning time of the arc on the stationary contact is shortened, the stationary contact is protected, and the service life is prolonged.
The other end of the static contact plate body 6 is provided with a first through hole 23 and a second through hole 24, and the diameter of the first through hole 23 is larger than that of the second through hole 24.
The arc striking head 12 is obliquely and obliquely arranged.
The shunt opening 8 comprises a square shunt opening 21 and a triangular shunt opening 22, the square shunt opening 21 is communicated with the triangular shunt opening 22, the square shunt opening 21 is close to the static contact arcing part 7, and the triangular shunt opening 22 is far away from the static contact arcing part 7.
A boss 20 is arranged at one end, close to the static contact arc ignition portion 7, of the static contact plate body 6, the upper end face and the lower end face of the boss 20 are respectively flush with the upper end face and the lower end face of the static contact plate body 6, and the width of the boss 20 is smaller than that of the static contact plate body 6.
The static contact 2 is of a square structure.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a static contact of circuit breaker, includes static contact (1) and establishes static contact (2) on static contact (1), its characterized in that: the static contact (1) comprises a static contact body (3) and an auxiliary arc-striking block (4) arranged on the static contact body (3), the static contact body (3) comprises a static contact plate body (6), the end part of the static contact plate body (6) is punched and bent to form a static contact arc-striking part (7) and a branch opening (8) which correspond to each other, the static contact arc-striking part (7) is arranged right above the branch opening (8), the static contact arc-striking part (7) comprises an arc-striking connecting part (10), an arc transition part (11) and an arc-striking head (12) which are sequentially connected, the arc-striking connecting part (10) is connected with the static contact plate body (6), the static contact (2) is arranged on the arc-striking head (12), arc notches (14) are arranged on the arc-striking head (12) and on two sides close to the static contact (2), and arc-striking block mounting openings (16) are arranged at two ends of the branch opening (8), the auxiliary arc ignition block (4) is of a U-shaped structure and is arranged in the arc ignition block mounting hole (16), an arc ignition block connecting hole (17) is formed in the auxiliary arc ignition block (4), and an arc ignition block mounting hole (15) corresponding to the arc ignition block connecting hole (17) is formed in the arc ignition head (12).
2. The stationary contact of a circuit breaker as claimed in claim 1, wherein: the other end of the static contact plate body (6) is provided with a first through hole (23) and a second through hole (24), and the diameter of the first through hole (23) is larger than that of the second through hole (24).
3. The stationary contact of a circuit breaker as claimed in claim 1, wherein: the arc striking head (12) is obliquely and obliquely arranged in an inclined mode.
4. The stationary contact of a circuit breaker as claimed in claim 1, wherein: the shunt opening (8) comprises a square shunt opening (21) and a triangular shunt opening (22), the square shunt opening (21) is communicated with the triangular shunt opening (22), the square shunt opening (21) is close to the static contact arc-leading portion (7), and the triangular shunt opening (22) is far away from the static contact arc-leading portion (7).
5. The stationary contact of a circuit breaker as claimed in claim 1, wherein: a boss (20) is arranged at one end, close to the static contact arc ignition portion (7), of the static contact plate body (6), the upper end face and the lower end face of the boss (20) are respectively flush with the upper end face and the lower end face of the static contact plate body (6), and the width of the boss (20) is smaller than that of the static contact plate body (6).
6. The stationary contact of a circuit breaker as claimed in claim 1, wherein: the static contact (2) is of a square structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685098.2U CN213340264U (en) | 2020-11-19 | 2020-11-19 | Static contact of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022685098.2U CN213340264U (en) | 2020-11-19 | 2020-11-19 | Static contact of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213340264U true CN213340264U (en) | 2021-06-01 |
Family
ID=76078226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022685098.2U Active CN213340264U (en) | 2020-11-19 | 2020-11-19 | Static contact of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213340264U (en) |
-
2020
- 2020-11-19 CN CN202022685098.2U patent/CN213340264U/en active Active
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