CN112017925A - Arc extinguishing mechanism and circuit breaker for circuit breaker - Google Patents
Arc extinguishing mechanism and circuit breaker for circuit breaker Download PDFInfo
- Publication number
- CN112017925A CN112017925A CN202010997725.8A CN202010997725A CN112017925A CN 112017925 A CN112017925 A CN 112017925A CN 202010997725 A CN202010997725 A CN 202010997725A CN 112017925 A CN112017925 A CN 112017925A
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- CN
- China
- Prior art keywords
- striking
- arc
- arc extinguishing
- exhaust
- circuit breaker
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
The invention discloses an arc extinguishing mechanism for a circuit breaker and the circuit breaker. Its arc extinguishing mechanism for circuit breaker includes: a housing; an arc extinguishing chamber provided in the housing; the structure of striking, it is located just be located in the casing one side that the explosion chamber is close to contact mechanism, the structure of striking includes a plurality of striking archs and a plurality of striking grooves, the protruding orientation of striking the explosion chamber extends in order to guide electric arc, the striking groove shaping in striking bellied lateral part and communicate in the explosion chamber, wherein the striking arch has a plurality of intercommunication portions, the intercommunication portion communicates a plurality ofly the striking groove. The arc extinguishing mechanism for the circuit breaker of this structure, when electric arc passed through the arc-striking groove, can elongated fast and cut apart electric arc in order to introduce the explosion chamber with electric arc fast, wherein the different arc-striking grooves of intercommunication portion intercommunication can realize the automatically regulated of electric arc air current, has equalized the moving speed of the electric arc air current in different arc-striking grooves to accelerated the speed that electric arc extinguishes, avoided the potential safety hazard.
Description
Technical Field
The invention relates to the technical field of low-voltage electric appliances, in particular to an arc extinguishing mechanism for a circuit breaker and the circuit breaker.
Background
The low-voltage circuit breaker is used as an important element of a low-voltage power grid, and can quickly break the circuit particularly when short-circuit large current occurs in the circuit, so that the power grid is prevented from being damaged. The low-voltage circuit breaker can generate electric arcs in the process of breaking current, and if the electric arcs are burnt on the moving and static contacts for a long time and are not led into the arc extinguish chamber, the breaking current can fail; even if an arc can be introduced into the arc chute, if it cannot leave the moving and stationary contacts at a fast speed, it still causes a great deal of burning of the surfaces of the moving and stationary contacts, thus affecting the overall electrical life of the circuit breaker.
The prior art discloses an arc extinguishing mechanism for circuit breaker, and it includes explosion chamber and striking structure, and wherein the striking structure includes a plurality of consecutive arc archs and striking groove, and the protruding lateral part of arc forms the striking groove, and electric arc leads to in the explosion chamber through the striking groove.
However, in the arc extinguishing mechanism for the circuit breaker, the arc airflows in different arc striking grooves are different, and the moving speed of the arc airflow in part of the arc striking grooves is slow, so that the arc extinguishing speed is slowed down, and potential safety hazards exist.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the moving speed of arc airflow in a part of arc striking grooves in the arc extinguishing mechanism of the circuit breaker in the prior art is slow, so that the arc extinguishing speed is slowed down, and potential safety hazards exist, thereby providing the arc extinguishing mechanism for the circuit breaker and the circuit breaker.
An arc extinguishing mechanism for a circuit breaker, comprising:
a housing;
an arc extinguishing chamber provided in the housing;
the structure of striking, it is located just be located in the casing one side that the explosion chamber is close to contact mechanism, the structure of striking includes a plurality of striking archs and a plurality of striking grooves, the protruding orientation of striking the explosion chamber extends in order to guide electric arc, the striking groove shaping in striking bellied lateral part and communicate in the explosion chamber, wherein the striking arch has a plurality of intercommunication portions, the intercommunication portion communicates a plurality ofly the striking groove.
Further, the communication part is a communication hole and/or an opening groove.
Further, the arc striking protrusion is arc-shaped and protrudes towards a direction far away from the contact mechanism.
Further, the arc striking protrusions are provided with a plurality of communicating parts, and the communicating parts on the different arc striking protrusions are arranged in a staggered mode.
Further, the arc extinguishing chamber comprises a plurality of arc extinguishing grid pieces; the arc striking protrusion is close to the end part of the arc extinguishing chamber and the arc extinguishing grid piece is close to the end part of the arc striking protrusion at intervals.
Further, still include exhaust arc extinguishing structure, it is located in the casing and be located the explosion chamber is kept away from one side of contact mechanism, the electric arc warp exhaust arc extinguishing structure discharges the casing.
Further, exhaust arc extinguishing structure includes exhaust arch, exhaust runway and gas vent, exhaust arch by the explosion chamber orientation the direction of gas vent extends, the shaping of exhaust runway in exhaust bellied lateral part and communicate in the explosion chamber, the gas vent is located on the casing and communicate in the exhaust runway.
Further, the exhaust arc extinguishing structure further comprises an exhaust blocking piece, and the exhaust blocking piece is arranged on the side wall of part or all of the exhaust runway.
Further, the exhaust blocking member is arranged obliquely toward the direction in which the exhaust port is located.
A circuit breaker, comprising: such as the arc extinguishing mechanism for the circuit breaker.
The technical scheme of the invention has the following advantages:
1. the invention provides an arc extinguishing mechanism for a circuit breaker, which comprises: a housing; an arc extinguishing chamber provided in the housing; the structure of striking, it is located just be located in the casing one side that the explosion chamber is close to contact mechanism, the structure of striking includes a plurality of striking archs and a plurality of striking grooves, the protruding orientation of striking the explosion chamber extends in order to guide electric arc, the striking groove shaping in striking bellied lateral part and communicate in the explosion chamber, wherein the striking arch has a plurality of intercommunication portions, the intercommunication portion communicates a plurality ofly the striking groove. The arc extinguishing mechanism for the circuit breaker of this structure, when electric arc passed through the arc-striking groove, can elongated fast and cut apart electric arc in order to introduce the explosion chamber with electric arc fast, wherein the different arc-striking grooves of intercommunication portion intercommunication can realize the automatically regulated of electric arc air current, has equalized the moving speed of the electric arc air current in different arc-striking grooves to accelerated the speed that electric arc extinguishes, avoided the potential safety hazard.
2. The invention provides an arc extinguishing mechanism for a circuit breaker, which comprises an exhaust bulge, an exhaust runway and an exhaust port, wherein the exhaust bulge extends from an arc extinguishing chamber to the direction of the exhaust port, the exhaust runway is formed on the side part of the exhaust bulge and communicated with the arc extinguishing chamber, and the exhaust port is arranged on a shell and communicated with the exhaust runway. The arc extinguishing mechanism for the circuit breaker with the structure avoids the reignition of the electric arc flowing out of the arc extinguishing chamber by being provided with the exhaust arc extinguishing structure.
3. The invention provides an arc extinguishing mechanism for a circuit breaker, which further comprises an exhaust blocking piece, wherein the exhaust blocking piece is arranged on the side wall of part or all of the exhaust runway. The arc extinguishing mechanism for the circuit breaker with the structure can effectively prevent metal particles of electric arc from being discharged when the electric arc burns in the arc extinguishing chamber by arranging the exhaust blocking piece, so that accidents are avoided.
4. The invention provides an arc extinguishing mechanism for a circuit breaker, wherein an exhaust blocking piece is obliquely arranged towards the direction of an exhaust port. The arc extinguishing mechanism for the circuit breaker with the structure is convenient for discharging arc airflow.
5. The invention provides a circuit breaker, comprising: such as the arc extinguishing mechanism for the circuit breaker. The circuit breaker with the structure has all the advantages brought by the circuit breaker arc extinguishing mechanism.
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 schematic structural view of an arc extinguishing mechanism for a circuit breaker provided in embodiment 1 of the present invention;
fig. 2 is a schematic view of the arc extinguishing mechanism for the circuit breaker shown in fig. 1, not shown, for example, an arc extinguishing chamber;
FIG. 3 is an enlarged view of a portion of the arc chute and arc initiation protrusion shown in FIG. 1;
FIG. 4 is an enlarged view of a portion of the exhaust lobe and the air outlet shown in FIG. 1;
description of reference numerals:
1-a shell;
21-arc extinguishing grid sheet, 22-arc extinguishing installation shell and 23-air outlet;
3-an operating mechanism;
4-a contact mechanism;
51-arc striking protrusions, 52-arc striking grooves and 53-open grooves;
61-exhaust lobe, 62-exhaust race, 63-exhaust port, 64-exhaust blocker, 65-L section, 66-arc connection, 67-inclined connection, 68-horizontal section.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being 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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.
Example 1
The present embodiment provides an arc extinguishing mechanism for a circuit breaker as shown in fig. 1 to 4, including: the arc extinguishing device comprises a shell 1, an arc extinguishing chamber, an arc striking structure and an exhaust arc extinguishing structure. The arc extinguishing chamber is arranged in the shell 1 and comprises a plurality of arc extinguishing grid pieces 21 and an arc extinguishing installation shell 22, the arc extinguishing grid pieces 21 are installed on the arc extinguishing installation shell 22, and an air outlet 23 is arranged on the arc extinguishing installation shell 22; the arc striking structure is arranged in the shell 1 and is positioned on one side of the arc extinguishing chamber close to the contact mechanism 4; the exhaust arc extinguishing structure is arranged in the shell 1 and positioned on one side of the arc extinguishing chamber far away from the contact mechanism 4, and the electric arc is exhausted out of the shell 1 through the exhaust arc extinguishing structure.
As shown in fig. 1, the arc striking structure in the present embodiment includes a plurality of arc striking protrusions 51 and a plurality of arc striking grooves 52, the arc striking protrusions 51 extend toward the arc extinguishing chamber to guide an arc, and the arc striking grooves 52 are formed at sides of the arc striking protrusions 51 and communicate with the arc extinguishing chamber. Of course, the arc striking protrusion 51 may be provided as one. As shown in fig. 1 and 3, the arc striking protrusion 51 is arc-shaped and protrudes in a direction away from the contact mechanism 4; and the end part of the arc striking protrusion 51 close to the arc extinguishing chamber and the end part of the arc extinguishing grid 21 close to the arc striking protrusion 51 are arranged at intervals.
The arc striking protrusion 51 has a plurality of communicating portions, and the communicating portions communicate with the plurality of arc striking grooves 52. Referring specifically to fig. 1 and 2, the communicating portion in the present embodiment is an open groove 53, i.e., the communicating portion is provided as an opening. Of course, the communicating portion may be a communicating hole; or when the communication portion is provided in plurality, a part of the communication portion may be the communication hole and a part of the communication portion may be the open groove 53. As shown in fig. 2, the communication portions on the different arc striking protrusions 51 are arranged offset from each other.
As shown in fig. 1 and 2, the exhaust arc extinguishing structure in this embodiment includes an exhaust protrusion 61, an exhaust runway 62, an exhaust port 63, and an exhaust blocking member 64, wherein the exhaust protrusion 61 extends from the arc extinguish chamber toward the exhaust port 63, the exhaust runway 62 is formed at a side portion of the exhaust protrusion 61 and is communicated with the arc extinguish chamber, the exhaust port 63 is disposed on the housing 1 and is communicated with the exhaust runway 62, and a part or all of a side wall of the exhaust runway 62 is provided with the exhaust blocking member 64. Specifically, the side walls of the exhaust runway 62 may be formed by exhaust protrusions, a bottom wall of the housing, protrusions required by other mechanisms of the housing, or a combination thereof.
The exhaust arc extinguishing structure is arranged, so that the electric arc flowing out of the arc extinguishing chamber is prevented from being re-burnt; by arranging the exhaust blocking member 64, the metal particles of the arc can be effectively blocked from being exhausted when the arc is burnt in the arc extinguishing chamber, and accidents are avoided.
Specifically, the exhaust boss 61 includes an L-shaped portion 65, a connecting portion, and a horizontal portion 68, the L-shaped portion 65 is bent toward the arc extinguishing chamber and is bent toward a direction away from the operating mechanism 3, the connecting portion is connected to the L-shaped portion 65 and the horizontal portion 68, and the horizontal portion 68 is connected to the housing 1. Wherein the connecting portion is an arc-shaped connecting portion 66 and/or the connecting portion is an inclined connecting portion 67. And when the connecting part is the arc-shaped connecting part 66, the arc-shaped connecting part 66 protrudes towards the arc extinguish chamber; when the connection portion is the inclined connection portion 67, the inclined connection portion 67 is provided to be inclined in a direction away from the arc extinguishing chamber toward a direction away from the operating mechanism 3.
Specifically, the number of the exhaust protrusions 61 in the present embodiment is two, the number of the exhaust tracks 62 is three, and the number of the exhaust ports 63 is three and is in one-to-one correspondence with the exhaust tracks 62. Of course, the number of the exhaust protrusions 61, the exhaust runners 62 and the exhaust ports 63 is not limited, and can be selected according to actual requirements.
Wherein the side wall of the exhaust runway 62 closest to the operating mechanism 3 is not provided with the exhaust blocking piece 64, and the connecting part of the exhaust bulge 61 below the exhaust runway 62 closest to the operating mechanism 3 is an arc-shaped connecting part 66; the side walls of the other two exhaust tracks 62 are provided with exhaust blocking members 64, the connecting part of the exhaust protrusion 61 positioned below the middle exhaust track 62 is an inclined connecting part 67, and the width of the channel of the horizontal part 68 closest to the exhaust track 62 of the operating mechanism 3 is smaller than the width of the channel of the other exhaust tracks 62 positioned on the horizontal part 68. Of course, exhaust stops 64 may be provided on all of the side walls of the exhaust runway 62. Wherein the exhaust blocking member 64 is disposed obliquely toward the direction in which the exhaust port 63 is located, facilitating the discharge of the arc gas flow. Of course, the exhaust blocking member 64 may also be arranged vertically or obliquely towards the direction in which the arc extinguishing chamber is located.
As shown in fig. 4, the exhaust protrusion 61 is disposed away from the air outlet 23, so that the exhaust protrusion 61 does not block the air outlet 23, and the arc gas flow is convenient to flow out from the air outlet 23 in the arc extinguishing chamber; and adjacent L-shaped portions 65 are spaced apart by a plurality of air outlets 23.
According to the arc extinguishing mechanism for the circuit breaker, when an electric arc passes through the arc striking grooves 52, the electric arc can be rapidly elongated and divided to be rapidly introduced into the arc extinguishing chamber, the communication parts are communicated with the different arc striking grooves 52, automatic adjustment of the electric arc airflow can be achieved, the movement speeds of the electric arc airflow of the different arc striking grooves 52 are balanced, the electric arc extinguishing speed is increased, and potential safety hazards are avoided.
Example 2
The present embodiment provides a circuit breaker including the arc extinguishing mechanism for a circuit breaker as mentioned in embodiment 1.
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. An arc extinguishing mechanism for a circuit breaker, comprising:
a housing;
an arc extinguishing chamber provided in the housing;
the structure of striking, it is located just be located in the casing one side that the explosion chamber is close to contact mechanism, the structure of striking includes a plurality of striking archs and a plurality of striking grooves, the protruding orientation of striking the explosion chamber extends in order to guide electric arc, the striking groove shaping in striking bellied lateral part and communicate in the explosion chamber, wherein the striking arch has a plurality of intercommunication portions, the intercommunication portion communicates a plurality ofly the striking groove.
2. The arc extinguishing mechanism for the circuit breaker according to claim 1, wherein the communication portion is a communication hole and/or an open groove.
3. An arc extinguishing mechanism for a circuit breaker according to claim 1 or 2, characterized in that the arc striking protrusion is arc-shaped and protrudes in a direction away from the contact mechanism.
4. The arc extinguishing mechanism for the circuit breaker according to claim 3, wherein a plurality of the arc striking protrusions are provided, and the communication portions on different arc striking protrusions are arranged in a staggered manner.
5. The arc extinguishing mechanism for the circuit breaker according to claim 4, wherein the arc extinguishing chamber comprises a plurality of arc extinguishing bars; the arc striking protrusion is close to the end part of the arc extinguishing chamber and the arc extinguishing grid piece is close to the end part of the arc striking protrusion at intervals.
6. The arc extinguishing mechanism for the circuit breaker according to claim 1 or 2, further comprising an exhaust arc extinguishing structure disposed in the housing and located on a side of the arc extinguishing chamber away from the contact mechanism, wherein the arc is exhausted from the housing through the exhaust arc extinguishing structure.
7. The arc extinguishing mechanism for the circuit breaker according to claim 6, wherein the exhaust arc extinguishing structure comprises an exhaust protrusion, an exhaust runway and an exhaust port, the exhaust protrusion extends from the arc extinguishing chamber towards the exhaust port, the exhaust runway is formed on a side portion of the exhaust protrusion and communicated with the arc extinguishing chamber, and the exhaust port is arranged on the housing and communicated with the exhaust runway.
8. The arc extinguishing mechanism for the circuit breaker according to claim 7, wherein the exhaust arc extinguishing structure further comprises an exhaust blocking member, and part or all of the side walls of the exhaust runway are provided with the exhaust blocking member.
9. The arc extinguishing mechanism for a circuit breaker according to claim 8, wherein the exhaust blocking member is disposed obliquely toward the direction in which the exhaust port is located.
10. A circuit breaker, comprising: the arc extinguishing mechanism for the circuit breaker according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010997725.8A CN112017925A (en) | 2020-09-21 | 2020-09-21 | Arc extinguishing mechanism and circuit breaker for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010997725.8A CN112017925A (en) | 2020-09-21 | 2020-09-21 | Arc extinguishing mechanism and circuit breaker for circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112017925A true CN112017925A (en) | 2020-12-01 |
Family
ID=73522060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010997725.8A Pending CN112017925A (en) | 2020-09-21 | 2020-09-21 | Arc extinguishing mechanism and circuit breaker for circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112017925A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117059453A (en) * | 2023-09-11 | 2023-11-14 | 浙江人民电器有限公司 | Built-in arc isolation cover, arc extinguishing system and switching device for switching device |
| WO2024017046A1 (en) * | 2022-07-21 | 2024-01-25 | 上海良信电器股份有限公司 | Switch unit, isolation switch, and power supply system |
-
2020
- 2020-09-21 CN CN202010997725.8A patent/CN112017925A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024017046A1 (en) * | 2022-07-21 | 2024-01-25 | 上海良信电器股份有限公司 | Switch unit, isolation switch, and power supply system |
| CN117059453A (en) * | 2023-09-11 | 2023-11-14 | 浙江人民电器有限公司 | Built-in arc isolation cover, arc extinguishing system and switching device for switching device |
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