CN219677190U - Arc blocking type circuit breaker lever assembly - Google Patents
Arc blocking type circuit breaker lever assembly Download PDFInfo
- Publication number
- CN219677190U CN219677190U CN202320412560.2U CN202320412560U CN219677190U CN 219677190 U CN219677190 U CN 219677190U CN 202320412560 U CN202320412560 U CN 202320412560U CN 219677190 U CN219677190 U CN 219677190U
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- CN
- China
- Prior art keywords
- arc
- circuit breaker
- blocking
- plate
- arc blocking
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Links
- 230000000903 blocking effect Effects 0.000 title claims abstract description 99
- 238000005192 partition Methods 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a blocking arc type circuit breaker lever assembly, which comprises a circuit breaker shell, wherein a partition plate is arranged in the middle of the circuit breaker shell, a first arc extinguishing cavity and a second arc extinguishing cavity are respectively formed at two sides of the partition plate, a placing groove is formed in the partition plate, a contact seat is arranged in the placing groove, the lower end of the contact seat extends into the first arc extinguishing cavity and is provided with a first blocking arc piece, the bottom of the first blocking arc piece is provided with a first blocking arc plate, one side of the contact seat is connected with a second blocking arc piece, the lower end of the second blocking arc piece extends into the second arc extinguishing cavity and is provided with a second blocking arc plate, and blocking arc pieces are arranged at two sides of the partition plate; the first arc blocking piece and the second arc blocking piece are respectively connected with an L-pole moving contact and an N-pole moving contact. The utility model can shield the arc gas and reduce the damage of the arc gas to the actuating mechanism.
Description
Technical Field
The utility model relates to a circuit breaker, in particular to a lever assembly of an arc blocking type circuit breaker.
Background
The moving and static contacts of the circuit breaker can form a large amount of electric arcs and high-temperature gas at the moment of opening the circuit breaker, and the air pressure in the circuit breaker is rapidly increased, so that the high-temperature gas with the electric arcs can impact the peripheral parts, and the breakdown of the impacted surface is damaged. Aiming at the phenomenon, the current circuit breaker is provided with an arc extinguishing mechanism at one end of a fixed contact, and two sides of the fixed contact are wrapped by utilizing a circuit breaker shell, so that the functions of striking an arc and extinguishing the arc are realized. However, with the decrease of the gas outlet position and the decrease of the gas outlet efficiency, the impact force of the generated gas is increased; and because the circuit breaker needs to leave the space that supplies the moving contact to rotate the switch-off in actuating mechanism position for this position can't shelter from through the baffle, thereby cause arc gas to produce back part and can get into in the arc extinguishing mechanism and normally discharge thereupon, and another part can move and strike actuating mechanism towards keeping away from arc extinguishing mechanism one side, lead to actuating mechanism to receive the breakdown phenomenon of impact surface, reduce actuating mechanism's motion stability.
Accordingly, there is a need for a circuit breaker arc blocking structure that reduces arc gas damage.
Disclosure of Invention
The utility model aims to provide a lever assembly of an arc blocking type circuit breaker. The shielding device can shield arc gas and reduce damage of the arc gas to the actuating mechanism.
The technical scheme of the utility model is as follows: the arc blocking type circuit breaker lever assembly comprises a circuit breaker shell, wherein a partition plate is arranged in the middle of the circuit breaker shell, a first arc extinguishing cavity and a second arc extinguishing cavity are formed in two sides of the partition plate respectively, a placing groove which is communicated with the first arc extinguishing cavity and the second arc extinguishing cavity is formed in the partition plate, a contact seat is arranged in the placing groove, the lower end of the contact seat extends to the first arc extinguishing cavity and is provided with a first arc blocking piece, the bottom of the first arc blocking piece is provided with a first arc blocking plate, one side of the contact seat is connected with a second arc blocking piece, the lower end of the second arc blocking piece extends to the second arc extinguishing cavity and is provided with a second arc blocking plate, and two sides of the partition plate are provided with arc blocking pieces which are matched with the first arc blocking plate and the second arc blocking plate; the first arc blocking piece and the second arc blocking piece are respectively connected with an L-pole moving contact and an N-pole moving contact, the lower end of the L-pole moving contact penetrates through the first arc blocking plate and the arc blocking piece to extend to the lower side, and the N-pole moving contact penetrates through the second arc blocking plate and the arc blocking piece to extend to the lower side.
In the arc blocking type circuit breaker lever assembly, the first arc blocking plate and the second arc blocking plate are respectively provided with a first groove at the middle part, and the second groove is arranged at the middle part of the arc blocking piece.
In the arc blocking type circuit breaker lever assembly, the outer end surfaces of the first arc blocking plate and the second arc blocking plate are mutually attached to the arc blocking piece.
In the arc blocking type circuit breaker lever assembly, the outer sides of the L-pole moving contact and the N-pole moving contact are respectively provided with an arc striking sheet connected with the circuit breaker shell.
In the arc blocking type circuit breaker lever assembly, the upper end of the arc striking piece close to one side of the second arc blocking plate is provided with the limiting plate extending into the second groove, and the inner side of the limiting plate is buckled with the arc blocking piece.
In the arc blocking type circuit breaker lever assembly, the outer side of the limiting plate is provided with the pressing plate, the middle part of the pressing plate is mutually attached to the limiting plate, and the periphery of the pressing plate is buckled and connected with the partition plate.
Compared with the prior art, the first arc-extinguishing cavity and the second arc-extinguishing cavity above the movable contact can be shielded by the cooperation of the first arc-blocking plate, the second arc-blocking plate and the arc-blocking sheet, so that the protection effect of the actuating mechanism is realized, only a channel for the arc gas to flow to the arc-extinguishing mechanism is reserved at the arc-extinguishing cavity, the impact damage of the arc gas to the peripheral functional parts is effectively avoided, and the arc striking and extinguishing effects of the circuit breaker are improved; the first arc baffle plate and the second arc baffle plate can also rotate together with the opening and closing actions of the moving contact through optimizing the connection structures of the first arc baffle plate, the second arc baffle plate and the moving contact, and the first arc baffle plate and the second arc baffle plate are kept to be overlapped with each other; therefore, the shielding effect on the actuating mechanism can be achieved at any position of the moving contact, and the protection stability of the utility model is improved. Therefore, the utility model can shield the arc gas and reduce the damage of the arc gas to the actuating mechanism.
Drawings
FIG. 1 is a schematic view of the structure of the present utility model after removal of the tablets;
FIG. 2 is an enlarged view of FIG. 1 in the direction A;
FIG. 3 is an outline view of the contact block and the second arc blocking member;
fig. 4 is a front view of the utility model on one side of the first arc chute;
figure 5 is a front view of the utility model on one side of the second arc chute.
The marks in the drawings are: the circuit breaker comprises a 1-circuit breaker shell, a 2-partition plate, a 3-placing groove, a 4-contact seat, a 5-first arc blocking piece, a 6-first arc blocking plate, a 7-second arc blocking piece, an 8-second arc blocking plate, a 9-arc blocking piece, a 10-L pole moving contact, an 11-N pole moving contact, a 12-first groove, a 13-second groove, a 14-arc striking piece, a 15-limiting plate and a 16-tabletting.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The arc blocking type circuit breaker lever assembly is shown in fig. 1, and comprises a circuit breaker shell 1, wherein a partition plate 2 is arranged in the middle of the circuit breaker shell 1, a first arc extinguishing cavity and a second arc extinguishing cavity are respectively formed in two sides of the partition plate 2, a placing groove 3 for communicating the first arc extinguishing cavity with the second arc extinguishing cavity is formed in the partition plate 2, a contact seat 4 is arranged in the placing groove 3, the contact seat 4 is a part in the existing actuating mechanism, the lower end of the contact seat 4 extends into the first arc extinguishing cavity and is provided with a first arc blocking piece 5, the first arc blocking piece 5 and the contact seat 4 are integrally formed, a first arc blocking plate 6 is arranged at the bottom of the first arc blocking piece 5, one side of the contact seat 4 is connected with a second arc blocking piece 7, the lower end of the second arc blocking piece 7 extends into the second arc extinguishing cavity and is provided with a second arc blocking plate 8, the first arc blocking plate 6 and the second arc blocking plate 8 are symmetrically arranged left and right with the partition plate 2 as the center, and two sides of the partition plate 2 are provided with arc blocking pieces 9 matched with the first arc blocking plate 6 and the second arc blocking plate 8; the first arc blocking piece 5 and the second arc blocking piece 7 are respectively connected with an L-pole moving contact 10 and an N-pole moving contact 11, the lower end of the L-pole moving contact 10 passes through the first arc blocking plate 6 and the arc blocking piece 9 to extend to the lower side, and the N-pole moving contact 11 passes through the second arc blocking plate 8 and the arc blocking piece 9 to extend to the lower side.
The middle parts of the first arc baffle 6 and the second arc baffle 8 are respectively provided with a first groove 12 for the N-pole moving contact 11 or the L-pole moving contact 10 to pass through, and the middle part of the arc baffle 9 is provided with a second groove 13 for the N-pole moving contact 11 or the L-pole moving contact 10 to pass through.
The outer end surfaces of the first arc baffle plate 6 and the second arc baffle plate 8 are mutually attached to the arc baffle plate 9, and the first arc baffle plate 6 and the second arc baffle plate 8 can freely slide on the arc baffle plate 9 along with the rotation of the contact seat 4; when the movable contact is at any position, the outer ends of the first arc baffle 6 and the second arc baffle 8 are kept in an overlapped state with the arc baffle 9.
The two sides of the L-pole moving contact 10 and the N-pole moving contact 11 are respectively provided with an arc striking piece 14 connected with the circuit breaker shell 1, the arc striking pieces 14 are formed by buckling a plastic arc-isolating plate and a metal magnetization magnetic conduction plate, the magnetic conduction plate is mutually separated from arc gas under the blocking of the arc-isolating plate, the periphery of the arc-isolating plate is connected with the circuit breaker shell 1, and the arc striking pieces are used for accelerating the flowing speed of an electric arc and the heat transfer efficiency from the inside to the outside of the circuit breaker.
The upper end of the striking plate 14 close to one side of the second arc baffle 8 is provided with a limiting plate 15 extending into the second groove 13, the inner side of the limiting plate 15 is buckled with the arc baffle 9, and the outer side of the limiting plate 15 shields the outer wall of the second arc baffle 8.
The outside of limiting plate 15 is equipped with preforming 16, and the middle part and the laminating of limiting plate 15 each other of preforming 16, partition plate 2 is connected to the lock all around of preforming 16.
The working principle of the utility model is as follows: when the breaker is opened, the tripping mechanism ejects out to drive the actuating mechanism to act, so that the contact base 4, the L-pole moving contact 10 and the N-pole moving contact 11 rotate to open the gate along with the actuating mechanism; when the contact seat 4 rotates, the first arc blocking piece 5 and the second arc blocking piece 7 in the arc extinguishing cavities at the two sides rotate together and cover the two side spaces of the moving contact by utilizing the first arc blocking plate 6 and the second arc blocking plate 8, and the arc blocking piece 9 which is positioned at the outer side of the arc blocking plate and is overlapped with the arc blocking plate is matched to realize shielding of arc gas, so that the arc gas is prevented from directly impacting the contact seat 4 through the gap, and the use stability of an executing structure is improved.
After the arc gas is generated, the magnetic resistance in the magnetic circuit can be reduced through the magnetic conduction plate on the striking plate 14, so that the magnetic induction intensity of the arc generating position becomes large, the electrodynamic force on the arc is increased, and the arc is accelerated to enter the arc extinguishing chamber.
Claims (6)
1. Keep off arc formula circuit breaker lever subassembly, its characterized in that: the circuit breaker comprises a circuit breaker shell (1), wherein a partition plate (2) is arranged in the middle of the circuit breaker shell (1), a first arc extinguishing cavity and a second arc extinguishing cavity are respectively formed in two sides of the partition plate (2), a placing groove (3) for communicating the first arc extinguishing cavity and the second arc extinguishing cavity is formed in the partition plate (2), a contact seat (4) is arranged in the placing groove (3), the lower end of the contact seat (4) extends to the first arc extinguishing cavity and is provided with a first arc blocking piece (5), the bottom of the first arc blocking piece (5) is provided with a first arc blocking plate (6), one side of the contact seat (4) is connected with a second arc blocking piece (7), the lower end of the second arc blocking piece (7) extends to the second arc extinguishing cavity and is provided with a second arc blocking plate (8), and arc blocking pieces (9) matched with the first arc blocking plate (6) and the second arc blocking plate (8) are arranged in two sides of the partition plate (2). The first arc blocking piece (5) and the second arc blocking piece (7) are respectively connected with an L-pole moving contact (10) and an N-pole moving contact (11), the lower end of the L-pole moving contact (10) penetrates through the first arc blocking plate (6) and the arc blocking piece (9) to extend to the lower side, and the N-pole moving contact (11) penetrates through the second arc blocking plate (8) and the arc blocking piece (9) to extend to the lower side.
2. The arc blocking circuit breaker lever assembly of claim 1, wherein: the middle parts of the first arc baffle (6) and the second arc baffle (8) are respectively provided with a first groove (12), and the middle parts of the arc baffle sheets (9) are respectively provided with a second groove (13).
3. The arc blocking circuit breaker lever assembly of claim 1, wherein: the outer end surfaces of the first arc baffle (6) and the second arc baffle (8) are mutually attached to the arc baffle (9).
4. The arc blocking circuit breaker lever assembly of claim 2, wherein: the outer sides of the L-pole moving contact (10) and the N-pole moving contact (11) are respectively provided with an arc striking sheet (14) connected with the circuit breaker shell (1).
5. The arc blocking circuit breaker lever assembly of claim 4, wherein: the upper end of the arc striking piece (14) close to one side of the second arc blocking plate (8) is provided with a limiting plate (15) extending into the second groove (13), and the inner side of the limiting plate (15) is buckled with the arc blocking piece (9) mutually.
6. The arc blocking circuit breaker lever assembly of claim 5, wherein: the outside of limiting plate (15) is equipped with preforming (16), and the middle part and the limiting plate (15) of preforming (16) laminate each other, and division board (2) are connected to the lock all around of preforming (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320412560.2U CN219677190U (en) | 2023-03-01 | 2023-03-01 | Arc blocking type circuit breaker lever assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320412560.2U CN219677190U (en) | 2023-03-01 | 2023-03-01 | Arc blocking type circuit breaker lever assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219677190U true CN219677190U (en) | 2023-09-12 |
Family
ID=87928440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320412560.2U Active CN219677190U (en) | 2023-03-01 | 2023-03-01 | Arc blocking type circuit breaker lever assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219677190U (en) |
-
2023
- 2023-03-01 CN CN202320412560.2U patent/CN219677190U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |