CN220106418U - Arc extinguishing device and circuit breaker - Google Patents
Arc extinguishing device and circuit breaker Download PDFInfo
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- CN220106418U CN220106418U CN202321739068.2U CN202321739068U CN220106418U CN 220106418 U CN220106418 U CN 220106418U CN 202321739068 U CN202321739068 U CN 202321739068U CN 220106418 U CN220106418 U CN 220106418U
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- arc extinguishing
- extinguishing
- piece
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- 238000004880 explosion Methods 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides an arc extinguishing device and a circuit breaker comprising the same, wherein the arc extinguishing device comprises a moving contact, a fixed contact and an arc extinguishing chamber, the arc extinguishing chamber comprises an arc inlet part corresponding to the moving track of the moving contact, and a first arc extinguishing part and a second arc extinguishing part which are respectively arranged at two sides of the arc inlet part; the arc extinguishing grid plates comprise a third arc extinguishing grid plate assembly arranged on the arc inlet part, and a first arc extinguishing grid plate assembly and a second arc extinguishing grid plate assembly which are respectively arranged on the first arc extinguishing part and the second arc extinguishing part; the first arc extinguishing grid piece component and the second arc extinguishing grid piece component are respectively matched with each other to form an arc striking piece, the arc striking pieces are provided with opening parts, and the opening of each opening part extends from one end close to the arc inlet part to one end far away from the arc inlet part.
Description
Technical Field
The utility model relates to the field of circuit breakers, in particular to an arc extinguishing device and a circuit breaker.
Background
The circuit breaker is an important power distribution device in a low-voltage power distribution system, with the continuous improvement of the requirements of power engineering on power sources and power transmission and distribution devices, the requirements on the performance of a circuit protection switch are also higher and higher, and miniaturization, high performance, modularization and high reliability are the main development directions of the plastic-case circuit breaker at present. The arc extinguishing mechanism is also an important component of the molded case circuit breaker, and the arc extinguishing effect is directly related to the electrical life and sectioning capability of the circuit breaker.
The current circuit breaker sets up striking piece and explosion chamber cooperation in insulating housing generally, and the arc that the striking piece will generate is introduced in the explosion chamber that has the arc extinguishing bars piece to accomplish the arc extinguishing process, but current structure has following problem when using: the generated arc is led into the arc-extinguishing chamber by the arc striking sheet positioned on the arc-extinguishing chamber to extinguish the arc, but usually only the arc-extinguishing grid sheet positioned between the two arc striking sheets plays a role in arc extinction, and the utilization efficiency of the arc-extinguishing grid sheet positioned below the arc striking sheet and shielded by the arc striking sheet is extremely low, thereby influencing the arc-extinguishing efficiency.
For example, the chinese patent application No. 202010663860.9 discloses a circuit breaker, specifically designs an improvement in the layout structure of the circuit breaker, and by arranging the contact system approximately in the center position, the trip unit, the latch mechanism, the operating mechanism and the arc extinguishing system are arranged approximately around the contact system, so that the length space of the circuit breaker housing is fully utilized, the arrangement number of arc extinguishing bars is maximized, and the arc extinguishing capability is stronger. In this scheme the striking piece is confined whole, and though the quantity of arranging of arc extinguishing bars piece maximize, nevertheless because the shielding of striking piece itself, the arc extinguishing bars piece that the electric arc that draws is difficult to get into is located the moving contact motion track both ends position outside leads to the utilization ratio of arc extinguishing bars piece not high enough in the explosion chamber.
Therefore, the arc extinguishing structure needs to be improved, the arc striking effect of the arc striking sheet is improved, the utilization rate of the arc extinguishing grid sheet is further improved, and the arc extinguishing efficiency is improved.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings in the prior art and provide an arc extinguishing device and a circuit breaker, and the technical scheme adopted by the utility model is as follows:
the arc extinguishing device comprises a moving contact, a fixed contact and an arc extinguishing chamber, wherein the moving contact can move relative to the fixed contact and is provided with a closing position contacted with the fixed contact and a separating position far away from the fixed contact, the arc extinguishing chamber comprises a plurality of arc extinguishing grid sheets and an insulating fixing frame for fixing the arc extinguishing grid sheets, the arc extinguishing chamber comprises an arc inlet part corresponding to the moving contact movement track, and a first arc extinguishing part and a second arc extinguishing part which are respectively arranged at two sides of the arc inlet part; the arc-extinguishing grid plates comprise a third arc-extinguishing grid plate assembly arranged on the arc inlet part, and a first arc-extinguishing grid plate assembly and a second arc-extinguishing grid plate assembly which are respectively positioned on the first arc-extinguishing part and the second arc-extinguishing part; the first arc extinguishing portion, the second arc extinguishing portion still include with first arc extinguishing bars piece subassembly, the arc striking piece that the cooperation set up respectively of second arc extinguishing bars piece subassembly, the arc striking piece is including having open-ended opening, just the opening of opening extends to the one end of keeping away from the arc feeding portion from the one end that is close to the arc feeding portion, makes two arc striking pieces that are located first arc extinguishing portion, second arc extinguishing portion respectively can introduce corresponding first arc extinguishing bars piece subassembly, second arc extinguishing bars piece subassembly smoothly.
Preferably, the arc striking piece further comprises a base part and an arc striking part, wherein the base part is connected to the fixing frame and transits to the arc striking part through the opening part, and the arc striking part is arranged close to the moving contact or the fixed contact so as to separate an arc through the opening part after striking.
Preferably, the arc striking part comprises a first arc striking part, one end of the first arc striking part is connected with the opening part, and the first arc striking part is tilted relative to the base part in the thickness direction of the arc striking piece so as to be closer to the moving contact or the fixed contact; further, the arc striking part further comprises a second arc striking part, one end of the first arc striking part is connected with the opening part, the other end of the first arc striking part is connected with the second arc striking part, and the second arc striking part is bent relative to the first arc striking part, so that the second arc striking part is provided with an arc striking surface facing to the moving contact or the fixed contact. The tilting angle and the bending angle of the first arc striking part and the second arc striking part can be adaptively adjusted according to the relative positions of the arc extinguishing device and the moving contact or the fixed contact.
Preferably, the opening of the opening part is provided with a notch, the notch extends to the arc striking part, two arc striking arms comprising the arc striking part are formed at two sides of the opening, and the two arc striking arms are connected to the same base part; when the opening portion is provided with a plurality of openings, a notch may be provided on each opening, or a notch may be partially provided.
Preferably, the base is provided with a protrusion at one end far away from the striking part, the fixing frame comprises two mounting side plates arranged at two sides of the arc extinguishing grid plates, the protrusion extends into between the two mounting side plates and is in clearance fit or contact fit with the upper end edge part of the fourth arc extinguishing grid plate positioned at the outer end part of the first arc extinguishing grid plate assembly or the second arc extinguishing grid plate assembly, so that the electric arc is smoothly introduced between the arc extinguishing grid plates.
Preferably, the opening part is provided with a plurality of openings, the two ends of each opening form an arc striking path, and the plurality of openings form a plurality of groups of arc striking paths.
On the other hand, the utility model also provides a circuit breaker comprising the arc extinguishing device, when the arc striking sheet is matched with the moving contact, the arc striking sheet is arranged close to the opening position of the moving contact; when the arc striking piece is matched with the fixed contact, the arc striking piece is connected with the fixed contact.
The beneficial effects of the utility model are as follows: according to the technical scheme, the opening part with the opening is arranged on the arc striking sheet, and the opening of the opening part extends from one end close to the arc-extinguishing chamber arc-entering part to one end far away from the arc-entering part, so that the arc striking sheet can elongate and introduce the arc of the arc-entering part into two ends of the arc-extinguishing chamber through the opening part, the utilization rate of the arc-extinguishing gate sheet in the arc-extinguishing chamber is improved, and the arc-extinguishing effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic diagram of the overall structure of the utility model, in which a moving contact is in a brake-separating position;
FIG. 2 is a schematic view of a part of a fixing frame of the present utility model;
fig. 3 is a schematic diagram of an arc extinguishing chamber according to the present utility model;
fig. 4 is a schematic view of the structure of an arc striking plate in embodiment 2 of the present utility model;
fig. 5 is a schematic view of the structure of an arc striking plate in embodiment 3 of the present utility model;
fig. 6 is a schematic view of the structure of an arc striking plate in embodiment 4 of the present utility model;
FIG. 7 is a schematic view showing the assembly of an arc striking plate in embodiment 4 of the present utility model;
in the figure, 1-arc striking piece, 101-moving contact, 102-static contact, 11-opening, 12-notch, 13-base, 131-bulge, 14-arc striking part, 141-first arc striking part, 142-second arc striking part, 143-arc striking face, 15-arc striking arm, 2-fixing frame, 21-mounting side plate, 3-arc extinguishing chamber, 31-arc extinguishing grid piece, 311-first arc extinguishing grid piece component, 312-second arc extinguishing grid piece component, 313-third arc extinguishing grid piece component.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.
Example 1
As shown in fig. 1-3, the present embodiment provides an arc extinguishing device, which includes a moving contact 101, a fixed contact 102, and an arc extinguishing chamber 3, where the moving contact can move relative to the fixed contact 102 and has a closing position contacting the fixed contact 102 and a separating position far away from the fixed contact 102, the arc extinguishing chamber 3 includes a plurality of arc extinguishing grid sheets 31 and an insulating fixing frame 2 for fixing the arc extinguishing grid sheets 31, and the arc extinguishing chamber 3 includes an arc inlet portion corresponding to a moving contact movement track, and a first arc extinguishing portion and a second arc extinguishing portion respectively disposed at two sides of the arc inlet portion; the arc extinguishing gate plates 31 include a third arc extinguishing gate plate assembly 313 disposed at the arc inlet portion, and a first arc extinguishing gate plate assembly 311 and a second arc extinguishing gate plate assembly 312 respectively disposed at the first arc extinguishing portion and the second arc extinguishing portion; the first arc extinguishing portion and the second arc extinguishing portion further comprise an arc striking piece 1 which is respectively matched with the first arc extinguishing grid piece assembly 311 and the second arc extinguishing grid piece assembly 312, the arc striking piece 1 comprises an opening 11 with an opening, and the opening of the opening 11 extends from one end close to the arc inlet to one end far away from the arc inlet.
As shown in fig. 5, the striking plate 1 further includes a base 13 and an striking portion 14, the base 13 is connected to the fixing frame 2 and transits to the striking portion 14 through the opening 11, and the striking portion 14 is disposed near the moving contact or the fixed contact, so as to introduce an arc generated by on-off of the moving contact and the fixed contact into the arc extinguishing chamber 3.
The striking part 14 includes a first striking part 141, one end of the first striking part 141 is connected to the opening 11, and the first striking part 141 is tilted with respect to the base 13 in the thickness direction of the striking plate 1 to be closer to the moving contact or the fixed contact.
Example 2
As shown in fig. 4, on the basis of embodiment 1, the arc striking portion 14 further includes a second arc striking portion 142, one end of the first arc striking portion 141 is connected to the opening portion 11, the other end is connected to the second arc striking portion 142, the first arc striking portion 141 is tilted with respect to the base portion 13 in the thickness direction of the arc striking piece 1, and the second arc striking portion 142 is bent with respect to the first arc striking portion 141, so that the second arc striking portion 142 has an arc striking surface 143 facing the moving contact or the fixed contact.
Example 3
As shown in fig. 5, in embodiment 1 or embodiment 2, in embodiment 3, a notch 12 is provided on the opening of the opening 11, the notch 12 extends to the arc striking portion 14, two arc striking arms 15 including the arc striking portion 14 are formed on two sides of the opening, and the two arc striking arms 15 are connected to the same base 13.
Example 4
As shown in fig. 6 to 7, on the basis of embodiment 1, embodiment 2 or embodiment 3, a protrusion 131 is provided at an end of the base 13 away from the striking portion 14, the fixing frame 2 includes two mounting side plates 21 disposed at both sides of the arc extinguishing bar 31, and the protrusion 131 extends between the two mounting side plates 21 and maintains a small gap or contact fit with an upper end edge portion 3141 of a fourth arc extinguishing bar 314 located at an outer end portion of the first arc extinguishing bar assembly 311 or the second arc extinguishing bar assembly 312, so that an arc is smoothly introduced between the arc extinguishing bars.
In embodiments 1 to 4, a plurality of openings may be further provided on the opening 11, each of which elongates the arc to the arc extinguishing grid plate assembly corresponding to the first arc extinguishing portion or the second arc extinguishing portion;
when the arc extinguishing device is applied to a circuit breaker and is matched with a moving contact 101, the arc striking plate in embodiment 2 is preferably matched with the moving contact, and the arc striking portion 14 of the arc striking plate 1 is preferably close to the moving contact 101.
When the arc extinguishing device is applied to a circuit breaker and matched with a fixed contact, the arc striking plate 1 of the embodiment 3 is preferably connected with the fixed contact, and the arc extinguishing device is further provided with the following components: the first arc striking part 141 is connected with the fixed contact, so that the fixed contact is lifted relative to the arc extinguishing chamber, and the movable contact is contacted with the fixed contact 102.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (10)
1. The utility model provides an arc extinguishing device, includes moving contact (101), fixed contact (102), explosion chamber (3), the moving contact can for fixed contact (102) motion and have the combined floodgate position that contacts with fixed contact (102) and the separating brake position that keeps away from with fixed contact (102), explosion chamber (3) include a plurality of arc extinguishing bars piece (31) and are used for fixed mount (2) of arc extinguishing bars piece (31), its characterized in that: the arc extinguishing chamber (3) comprises an arc inlet part corresponding to the moving track of the moving contact, and a first arc extinguishing part and a second arc extinguishing part which are respectively arranged at two sides of the arc inlet part;
the arc-extinguishing grid plates (31) comprise a third arc-extinguishing grid plate assembly (313) arranged on the arc inlet part, and a first arc-extinguishing grid plate assembly (311) and a second arc-extinguishing grid plate assembly (312) which are respectively arranged on the first arc-extinguishing part and the second arc-extinguishing part;
the first arc extinguishing part and the second arc extinguishing part further comprise arc striking pieces (1) which are respectively matched with the first arc extinguishing grid piece assembly (311) and the second arc extinguishing grid piece assembly (312), the arc striking pieces (1) comprise opening parts (11) with openings, and the openings of the opening parts (11) extend from one ends close to the arc inlet parts to one ends far away from the arc inlet parts.
2. An arc extinguishing device according to claim 1, characterized in that: the arc striking piece (1) further comprises a base part (13) and an arc striking part (14), wherein the base part (13) is connected to the fixing frame (2) and transits to the arc striking part (14) through the opening part (11).
3. An arc extinguishing device according to claim 2, characterized in that: the arc striking part (14) comprises a first arc striking part (141), one end of the first arc striking part (141) is connected with the opening part (11), and the first arc striking part (141) is tilted relative to the base part (13) in the thickness direction of the arc striking piece (1).
4. An arc suppressing apparatus according to claim 3, wherein: the arc striking part (14) further comprises a second arc striking part (142), the other end of the first arc striking part (141) is connected with the second arc striking part (142), and the second arc striking part (142) is bent relative to the first arc striking part (141) so that the second arc striking part (142) is provided with an arc striking surface (143) facing the moving contact or the fixed contact.
5. An arc extinguishing device according to claim 2, characterized in that: the opening of the opening part (11) is provided with a notch (12), the notch (12) extends to the arc striking part (14), two arc striking arms (15) comprising the arc striking part (14) are formed on two sides of the opening, and the two arc striking arms (15) are connected to the same base part (13).
6. An arc extinguishing device according to claim 2, characterized in that: the base (13) is provided with protruding (131) away from the one end of striking portion (14), mount (2) are including setting up two installation curb plates (21) in arc extinguishing bars piece (31) both sides, protruding (131) stretches into between two installation curb plates (21) to with be located upper end edge position (3141) clearance fit or contact cooperation of fourth arc extinguishing bars piece (314) of first arc extinguishing bars piece subassembly (311) or second arc extinguishing bars piece subassembly (312) outer tip.
7. An arc extinguishing device according to claim 1, characterized in that: the opening part (11) is provided with a plurality of openings.
8. The arc extinguishing device of claim 4, wherein: the arc striking piece (1) is matched with the movable contact.
9. The arc extinguishing device of claim 5, wherein: the arc striking piece (1) is matched with the fixed contact, and the arc striking piece (1) is connected with the fixed contact.
10. A circuit breaker, characterized in that: an arc extinguishing device comprising the device of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321739068.2U CN220106418U (en) | 2023-07-04 | 2023-07-04 | Arc extinguishing device and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321739068.2U CN220106418U (en) | 2023-07-04 | 2023-07-04 | Arc extinguishing device and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220106418U true CN220106418U (en) | 2023-11-28 |
Family
ID=88868163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321739068.2U Active CN220106418U (en) | 2023-07-04 | 2023-07-04 | Arc extinguishing device and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220106418U (en) |
-
2023
- 2023-07-04 CN CN202321739068.2U patent/CN220106418U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |