CN115910719A - Magnetic blow-out system and circuit breaker - Google Patents
Magnetic blow-out system and circuit breaker Download PDFInfo
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- CN115910719A CN115910719A CN202211508989.8A CN202211508989A CN115910719A CN 115910719 A CN115910719 A CN 115910719A CN 202211508989 A CN202211508989 A CN 202211508989A CN 115910719 A CN115910719 A CN 115910719A
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- flash barrier
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- circuit breaker
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Abstract
The invention provides a magnetic blow-out system and a circuit breaker, wherein the magnetic blow-out system comprises two groups of arc isolation plates and magnetic conduction plates which are arranged inside a shell of the circuit breaker, each arc isolation plate is provided with a first surface and a second surface which are arranged in a back direction, the first surfaces of the arc isolation plates are arranged opposite to the other arc isolation plate, the second surfaces of the arc isolation plates are arranged opposite to the inner wall of the shell, an installation cavity suitable for installing the magnetic conduction plates is formed inside each arc isolation plate, a first arc striking channel is formed between the two first surfaces of the two arc isolation plates, and a second arc striking channel is formed between the second surfaces of the arc isolation plates and the inner wall of the shell. Like this air current and electric arc except that prior art leads to the explosion chamber outside through first striking passageway, can also lead to the explosion chamber through second striking passageway to can guide gaseous quick exhaust, above-mentioned magnetic blow-out system is applicable to the miniature circuit breaker of breaking current more than 10 KA.
Description
Technical Field
The invention relates to the technical field of low-voltage electrical appliances, in particular to a magnetic blow-out system and a circuit breaker.
Background
The miniature circuit breaker is a protective electric appliance installed on a terminal distribution line and is mainly used for overload and short-circuit protection of lines and electric equipment.
Miniature circuit breaker mainly includes the casing, contact subassembly, magnetism blows system and explosion chamber, contact subassembly includes moving contact and static contact, moving contact and static contact can produce electric arc when breaking absolutely, magnetism blows system can guide electric arc to the explosion chamber and carry out the arc extinguishing, it includes two sets of flash barriers and magnetic conduction board, be provided with the magnetic conduction board between flash barrier and the shells inner wall (the magnetic conduction board generally is iron plate, the flash barrier can play the effect of avoiding appearing electric arc stop on the magnetic conduction board and can not get into the explosion chamber), form the striking passageway that is used for guide air current and electric arc between two flash barriers, the inventor discovers in actual production, to the miniature circuit breaker of breaking electric current more than 10KA, it can produce great atmospheric pressure when breaking absolutely, because the striking passageway is narrower makes gaseous can not discharge fast, lead to the casing explosion easily.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the small circuit breaker of the breaking current of more than 10KA in the prior art is easy to generate shell explosion when breaking, thereby providing a magnetic blow-out system and a circuit breaker for guiding gas to be quickly exhausted.
Therefore, the invention provides a magnetic blow-out system, which comprises two groups of arc isolating plates and magnetic conducting plates arranged in a breaker shell, wherein each arc isolating plate is provided with a first surface and a second surface which are arranged oppositely, the first surface of each arc isolating plate is arranged opposite to the other arc isolating plate, the second surface of each arc isolating plate is arranged opposite to the inner wall of the shell, an installation cavity suitable for installing the magnetic conducting plate is formed in each arc isolating plate, a first arc striking channel is formed between the two first surfaces of the two arc isolating plates, and the No. YHA202200751 on our scheme is formed between the second surface of each arc isolating plate and the inner wall of the shell
The second arc striking channel is formed.
And the side surface of the edge of the arc isolating plate is provided with an opening which is communicated with the mounting cavity and used for inserting the magnetic conduction plate.
The upper part of the flash barrier is close to the contact assembly, and the lower edge of the flash barrier is provided with an opening.
A baffle plate suitable for shielding the opening is arranged in the shell. The installation cavity is a closed cavity.
And a plurality of convex blocks which extend towards the direction of the second surface of the arc isolating plate and are abutted against the second surface are arranged on the inner wall of the shell.
Magnetic blow system with be equipped with location structure between the casing, location structure includes: the first through hole is formed in the flash barrier; the second through hole is formed in the magnetic conduction plate and is opposite to the first through hole; and the positioning column penetrates through the first through hole and the second through hole.
And a convex block abutting against the second surface of the arc baffle is arranged at the joint of the positioning column and the shell.
The positioning structure further comprises a positioning groove arranged above the flash barrier and a positioning block arranged on the shell and matched with the positioning groove.
The invention also provides a circuit breaker comprising the magnetic blow-out system.
The technical scheme of the invention has the following advantages:
1. according to the magnetic blow-out system provided by the invention, the magnetic conduction plate is arranged in the mounting cavity in the arc isolation plate, so that the influence of the exposure of the magnetic conduction plate on the moving speed of an electric arc is avoided, the first arc striking channel is formed between the two first surfaces of the two arc isolation plates, and the second arc striking channel is formed between the second surface of the arc isolation plate and the inner wall of the shell, so that an air flow and the electric arc are guided to the outside of an arc extinguishing chamber through the first arc striking channel and can also be guided to the arc extinguishing chamber through the second arc striking channel like the prior art, and therefore, the air can be guided to be rapidly discharged.
2. According to the magnetic blowing system provided by the invention, the side face of the edge of the flash barrier is provided with the opening which is communicated with the mounting cavity and into which the magnetic conduction plate is inserted, and during assembly, the magnetic conduction plate can be inserted into the mounting cavity from the opening, so that the assembly is rapid and convenient.
3. According to the magnetic blowing system provided by the invention, the upper part of the arc isolating plate is close to the contact assembly, and the lower edge of the arc isolating plate is provided with the opening, so that the exposed position of the opening where the magnetic conducting plate is located is far away from the area where the contact assembly generates electric arcs, and the influence on the moving speed of the electric arcs is small.
4. According to the magnetic blowing system provided by the invention, the baffle plate suitable for shielding the opening is arranged in the shell, and the baffle plate can be in the design number YHA202200751
The influence on the moving speed of the electric arc caused by the fact that the magnetic conduction plate is exposed outside is avoided, and therefore the arc striking effect is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a cross-sectional view of a circuit breaker of the present invention;
FIG. 2 is a perspective view of a magnetic blow-out system and an arc chute;
FIG. 3 is an exploded view of the arc shield and the magnetic conductive plate;
fig. 4 is a perspective view of a circuit breaker housing.
Description of reference numerals: 1. a housing; 2. an arc barrier; 3. a first side; 4. a second face; 5. a mounting cavity; 6. a first arc striking channel; 7. a second arc ignition channel; 8. an opening; 9. a baffle plate; 10. a bump; 11. a first perforation; 12. a second perforation; 13. a positioning column; 14. positioning a groove; 15. positioning a block; 16. a magnetic conductive plate; 17. an arc extinguishing chamber; 18. a contact assembly.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience of description and simplification of description, but not for indicating or implying that the device or element of my proposal No. YHA202200751 referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples
This embodiment provides a circuit breaker, as shown in fig. 1 and 2, including circuit breaker casing 1 to and locate inside magnetic blow-out system and the explosion chamber 17 of casing, the magnetic blow-out system includes two sets of flash barriers 2 and the magnetic conduction board 16 that set up relatively.
As shown in fig. 1 and 2, the arc baffle 2 has a first surface 3 and a second surface 4 which are arranged oppositely, the first surface 3 of the arc baffle 2 is arranged opposite to the other arc baffle 2, the second surface 4 is arranged opposite to the inner wall of the housing 1, the arc baffle 2 has a mounting cavity 5 which is formed inside and is suitable for mounting the magnetic conducting plate 16, and an opening 8 which is arranged on the side surface of the edge and is communicated with the mounting cavity 5, and the opening 8 is suitable for inserting the magnetic conducting plate 16. In this embodiment, the upper portion of the arc barrier 2 is close to the contact assembly 18, and the lower edge of the arc barrier is provided with the opening 8, as shown in fig. 4, a baffle 9 adapted to block the opening 8 is provided inside the housing 1, and the baffle 9 and the housing 1 are integrally injection-molded.
As an alternative embodiment, the openings 8 may be provided on the left, right, and upper sides of the arc barrier 2.
As an alternative embodiment, the installation chamber 5 is a closed chamber.
As shown in fig. 1, a first arc-striking channel 6 is formed between two first surfaces 3 of two arc-separating plates 2, a second arc-striking channel 7 is formed between the second surface 4 of the arc-separating plate 2 and the inner wall of the shell 1, i's scheme No. YHA202200751
The inner wall of the shell 1 is provided with a plurality of projections 10 which extend towards the direction of the second surface 4 of the flash barrier 2 and are abutted against the second surface. A positioning structure is arranged between the magnetic blowing system and the housing 1, and as shown in fig. 3 and 4, the positioning structure comprises: the first through hole 11 is formed in the flash barrier 2; a second through hole 12 formed in the magnetic conductive plate 16 and disposed opposite to the first through hole 11; and the positioning column 13 is arranged to penetrate through the first through hole 11 and the second through hole 12. And a convex block 10 which is abutted against the second surface 4 of the arc isolating plate 2 is arranged at the joint of the positioning column 13 and the shell 1. The positioning structure further comprises a positioning groove 14 arranged above the flash barrier 2, and a positioning block 15 arranged on the shell 1 and matched with the positioning groove 14.
According to the magnetic blow-out system provided by the invention, the magnetic conduction plate 16 is arranged in the mounting cavity 5 inside the arc isolation plate 2, so that the influence of the magnetic conduction plate 16 exposed outside the arc isolation plate 2 on the moving speed of an electric arc is avoided, the first arc striking channel 6 is formed between the two first surfaces 3 of the two arc isolation plates 2, and the second arc striking channel 7 is formed between the second surface 4 of the arc isolation plate 2 and the inner wall of the shell 1, so that the gas flow and the electric arc are guided to the outside of an arc extinguishing chamber through the first arc striking channel 6 and can also be guided to the arc extinguishing chamber through the second arc striking channel 7 in the prior art, and the gas can be guided to be rapidly discharged, and the magnetic blow-out system is suitable for a small circuit breaker with the current of more than 10 KA.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides a magnetic blow-out system, is including locating inside two sets of flash barrier (2) and magnetic conduction board (16) of circuit breaker casing (1), flash barrier (2) have first face (3) and second face (4) that set up dorsad, flash barrier (2) first face (3) and another flash barrier (2) set up relatively, second face (4) with casing (1) inner wall sets up relatively, its characterized in that, the inside shaping of flash barrier (2) has and is suitable for the installation cavity (5) of magnetic conduction board (16), two of flash barrier (2) form first striking passageway (6) between first face (3), flash barrier (2) second face (4) with form second striking passageway (7) between casing (1) inner wall.
2. A magnetic blowing system according to claim 1, characterized in that the side of the edge of the flash barrier (2) is provided with an opening (8) which is communicated with the installation cavity (5) and is used for inserting the magnetic conduction plate (16).
3. A magnetic blowing system according to claim 2, characterised in that the upper part of the flash barrier (2) is close to the contact assembly (18), the lower edge of which is provided with said opening (8).
4. A magnetic blowing system according to claim 2 or 3, characterised in that inside said casing (1) there is a shutter (9) adapted to block said opening (8).
5. Magnetic blowing system according to claim 1, characterized in that the installation cavity (5) is a closed chamber.
6. A magnetic blowing system according to any of the claims 1 to 5, characterized in that the inner wall of the housing (1) is provided with a plurality of projections (10) extending towards and against the second face (4) of the flash barrier (2).
7. A magnetic blowing system according to any of the claims 1-6, characterized in that a positioning structure is provided between the magnetic blowing system and the housing (1), the positioning structure comprising:
the first through hole (11) is formed in the arc isolating plate (2);
the second through hole (12) is formed in the magnetic conduction plate (16) and is opposite to the first through hole (11);
and the positioning column (13) penetrates through the first through hole (11) and the second through hole (12) to be arranged.
8. A magnetic blowing system according to claim 7, characterized in that the connection of the positioning post (13) and the housing (1) is provided with a projection (10) which abuts against the second face (4) of the flash barrier (2).
9. The magnetic blowing system of claim 7, wherein the positioning structure further comprises a positioning groove (14) disposed above the flash barrier (2), and a positioning block (15) disposed on the housing (1) and adapted to the positioning groove (14).
10. A circuit breaker comprising a magnetic blow down system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211508989.8A CN115910719A (en) | 2022-11-29 | 2022-11-29 | Magnetic blow-out system and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211508989.8A CN115910719A (en) | 2022-11-29 | 2022-11-29 | Magnetic blow-out system and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115910719A true CN115910719A (en) | 2023-04-04 |
Family
ID=86483015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211508989.8A Pending CN115910719A (en) | 2022-11-29 | 2022-11-29 | Magnetic blow-out system and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115910719A (en) |
-
2022
- 2022-11-29 CN CN202211508989.8A patent/CN115910719A/en active Pending
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