CN114300319B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN114300319B CN114300319B CN202111638583.7A CN202111638583A CN114300319B CN 114300319 B CN114300319 B CN 114300319B CN 202111638583 A CN202111638583 A CN 202111638583A CN 114300319 B CN114300319 B CN 114300319B
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- Prior art keywords
- arc
- arc extinguishing
- circuit breaker
- housing
- extinguishing chamber
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to the technical field of electrical switches, in particular to a circuit breaker; the circuit breaker includes: the device comprises a shell, a fixed contact, a moving contact and an arc extinguishing piece, wherein the fixed contact is arranged on the shell; the movable contact is movably arranged on the shell and can be contacted with or separated from the fixed contact; the arc extinguishing piece is rotatably arranged on the shell; the moving contact and the fixed contact are mutually separated to form an arc generated during power-off protection, so that the arc extinguishing piece can be driven to rotate, and the arc extinguishing piece can be continuously cut, cooled and extinguished by utilizing the rotation of the arc extinguishing piece, so that the arc extinguishing speed of the circuit breaker is improved.
Description
Technical Field
The invention relates to the technical field of electrical switches, in particular to a circuit breaker.
Background
In use, various appliances may be equipped with circuit breakers for overload protection and short-circuit protection. Circuit breakers typically are configured with an arc chute; when a large current short circuit is encountered, an arc generated between the moving contact and the fixed contact can be cooled and extinguished by utilizing the arc extinguishing device.
However, the arc extinguishing device provided by the related art has a low arc extinguishing speed, which easily results in low breaking capacity of the circuit breaker.
Disclosure of Invention
The invention aims to provide a circuit breaker, which can improve the arc extinguishing speed and solve the problem of low breaking capacity of the circuit breaker.
Embodiments of the present invention are implemented as follows:
in a first aspect, the present invention provides a circuit breaker comprising:
a housing;
the fixed contact is arranged on the shell;
the movable contact is movably arranged on the shell and can be contacted with or separated from the fixed contact; and
The arc extinguishing piece is rotatably arranged on the shell; the moving contact and the fixed contact are separated from each other to form an arc generated during power-off protection, and the arc extinguishing member can be driven to rotate.
In an alternative embodiment, the housing is provided with an arc extinguishing chamber; the arc extinguishing cavity is provided with an inlet, an exhaust channel and an exhaust port, the arc extinguishing cavity is provided with a first side and a second side which are opposite, the inlet is arranged on the first side, the exhaust channel is arranged on the second side, and the exhaust port is arranged adjacent to the second side;
the arc extinguishing member is rotatably arranged in the arc extinguishing cavity, and an electric arc can enter the arc extinguishing cavity from the inlet and is discharged from the exhaust channel and the exhaust port after being cooled by the arc extinguishing member.
In an alternative embodiment, the arc extinguishing chamber further has a third side and a fourth side which are oppositely arranged, the exhaust channel being arranged adjacent to the third side, and the exhaust opening being arranged on the fourth side.
In an alternative embodiment, the housing is further provided with a mounting cavity, the circuit breaker further comprises an electromagnetic assembly disposed within the mounting cavity, and the exhaust port is in communication with the mounting cavity.
In an alternative embodiment, a baffle is provided between the mounting chamber and the arc extinguishing chamber.
In an alternative embodiment, the circuit breaker further comprises a partition plate connected to the housing and located in the exhaust passage for dividing the exhaust passage into two passages.
In an alternative embodiment, the arc extinguishing member comprises a rotating shaft and at least two grid plates, wherein the at least two grid plates are connected with the rotating shaft, the at least two grid plates are distributed around the rotating shaft, and the rotating shaft is rotationally connected with the shell.
In an alternative embodiment, the housing is provided with an arc extinguishing chamber and an arc runner, the arc extinguishing member is rotatably disposed in the arc extinguishing chamber, the arc runner is communicated with an inlet of the arc extinguishing chamber, and the arc runner is used for guiding the arc to move into the arc extinguishing chamber so as to drive the arc extinguishing member to rotate.
In an alternative embodiment, the arc runner is arc-shaped, and a tangent line of the arc runner at the inlet forms an included angle with the extending direction of at least one grating sheet adjacent to the inlet.
In an alternative embodiment, the grating sheet is provided with an arc striking opening for guiding the arc to move to push the grating sheet and rotate the arc extinguishing member.
In an alternative embodiment, the arc extinguishing members are arranged centrally symmetrically.
The circuit breaker of the embodiment of the invention has the beneficial effects that: the circuit breaker provided by the embodiment of the invention comprises a shell, a fixed contact, a moving contact and an arc extinguishing piece, wherein the fixed contact is arranged on the shell, the moving contact is movably arranged on the shell, and the moving contact can be contacted with or separated from the fixed contact; the arc extinguishing piece is rotatably arranged on the shell; the moving contact and the fixed contact are separated from each other to form an arc generated when power-off protection is performed, so that the arc extinguishing member can rotate. Because the arc can rotate the arc extinguishing member, when the arc extinguishing member rotates, the whole arc extinguishing member can reliably cut, cool and extinguish the arc, namely, when the whole arc extinguishing member rotates, the arc can be continuously cut, cooled and extinguished, so that the improvement of the arc extinguishing speed is ensured, and the problem of low breaking capacity of the circuit breaker is solved; and under the centrifugal effect that rotation ground arc extinguishing piece produced for the electric arc after cooling, the cutting is thrown away the arc extinguishing piece, in order to ensure that the arc extinguishing piece cuts, cools off and extinguishes to follow-up electric arc reliably, in order to further ensure the improvement of arc extinguishing speed, improves the problem that circuit breaker breaking capacity is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram illustrating a partial exploded view of an interrupt router according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a partial structure of an interrupt router according to an embodiment of the present invention;
fig. 3 is a schematic structural view of an arc extinguishing member according to some embodiments of the present invention;
fig. 4 is a schematic diagram of an interrupt router according to an embodiment of the invention.
Icon: 010-circuit breaker; 100-a housing; 101-a cover; 110-a stationary contact; 111-fixed contact arc angle; 120-moving contact; 130-arc extinguishing chamber; 131-inlet; 132-an exhaust passage; 133-exhaust port; 134-separator; 135-channel; 141-a first side; 142-a second side; 143-third side; 144-fourth side; 150-mounting cavity; 152-baffle; 160-arc running way; 170-plug holes; 171-plug-in columns; 180-lower arc striking plate; 200-arc extinguishing pieces; 210-a rotating shaft; 211-grid sheets; 212-arc striking.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "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; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The circuit breaker provided by the related art comprises an arc extinguishing device commonly called an arc extinguishing chamber, wherein the arc extinguishing device comprises a red steel paperboard and a plurality of equally-spaced iron sheets arranged on the red steel paperboard in parallel; because the space limitation of circuit breaker, when short circuit or overload lead to moving contact and static contact to separate and form the outage protection, the electric arc that produces can only get into the lower half of explosion chamber generally, and the upper half of explosion chamber can't obtain the make full use of, and then lead to the arc extinguishing device's that the correlation technique provided arc extinguishing speed is slow, leads to the breaking capacity of circuit breaker low easily.
The circuit breaker provided by the embodiment can improve the arc extinguishing speed and improve the problem of low breaking capacity of the circuit breaker. The circuit breaker of the present embodiment will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the present embodiment provides a circuit breaker 010 which can be used in various electric appliances, particularly various home electric appliances.
The circuit breaker 010 comprises a shell 100, a fixed contact 110 and a moving contact 120, wherein the fixed contact 110 is arranged on the shell 100, the moving contact 120 is movably arranged on the shell 100, and the moving contact 120 can be contacted with or separated from the fixed contact 110; when the electrical appliance is short-circuited or overloaded, the moving contact 120 moves relative to the fixed contact 110, and the moving contact 120 is separated from the fixed contact 110, so as to realize short-circuit and overload protection.
The working principle of the fixed contact 110 and the movable contact 120 is similar to that of the related art, and will not be described herein again; the movable contact 120 is rotatably connected to the housing 100 such that the movable contact 120 rotates relative to the housing 100 to be separated from or in contact with the stationary contact 110.
The circuit breaker 010 further includes an arc extinguishing member 200 rotatably disposed on the housing 100, and the moving contact 120 and the fixed contact 110 are separated from each other to form an arc generated during power-off protection, which can drive the arc extinguishing member 200 to rotate, that is, when overload or short circuit occurs, the moving contact 120 and the fixed contact 110 are separated from each other to generate an arc, which can drive the arc extinguishing member 200 to rotate. Because the arc can rotate the arc extinguishing member 200, when the arc extinguishing member 200 rotates, the whole arc extinguishing member 200 can reliably cut, cool and extinguish the arc, namely, when the whole arc extinguishing member 200 rotates, the arc can be continuously cut, cooled and extinguished, so that the improvement of the arc extinguishing speed is ensured, and the problem of low breaking capacity of the circuit breaker 010 is solved; moreover, under the centrifugal effect generated by the rotary arc extinguishing member 200, the cooled and cut electric arc is thrown away from the arc extinguishing member 200, so that the arc extinguishing member 200 can reliably cut, cool and extinguish the subsequent electric arc, the improvement of the arc extinguishing speed is further ensured, and the problem of low breaking capacity of the circuit breaker 010 is solved.
It should be noted that, the arc extinguishing member 200 rotates under the action of the arc, and further, other driving members are not required to be arranged to drive the arc extinguishing member 200, and the arc extinguishing member 200 is not required to be connected with the moving contact 120 in a transmission manner, so that the structure of the circuit breaker 010 is simpler and the cost is lower.
The structure of the arc extinguishing member 200 may be selected as desired; referring to fig. 1 and 2, in some embodiments, the arc extinguishing member 200 includes a rotating shaft 210 and at least two grid plates 211, wherein the at least two grid plates 211 are connected to the rotating shaft 210, and the at least two grid plates 211 are distributed around the rotating shaft 210, and the rotating shaft 210 is rotatably connected to the housing 100. When a short circuit or an overload is generated and the actuating contact 120 is separated from the fixed contact 110, the arc can push the grid plate 211 to enable the whole arc extinguishing member 200 to rotate, so that the arc can be continuously cut, cooled and extinguished by the rotating arc extinguishing member 200, and the whole arc extinguishing member 200 can be utilized when the arc is cut, cooled and extinguished, so that the arc extinguishing speed can be improved, and the problem of low breaking capacity of the circuit breaker 010 is ensured; also, the grid 211 may be repeatedly used to cool and extinguish the arc as the arc extinguishing member 200 rotates, to further secure the arc extinguishing speed.
The number of the grating pieces 211 of the arc extinguishing member 200 can be selected according to the need, the arc extinguishing member 200 of the present embodiment includes 12 grating pieces 211, and the 12 grating pieces 211 are all connected with the rotating shaft 210 and distributed around the rotating shaft 210; in order to ensure reliable and stable rotation of the arc extinguishing member 200, the grid 211 extends in the radial direction of the rotation shaft 210.
Of course, in other embodiments, the number of the gate plates 211 of the arc extinguishing member 200 may be 1,2, 3, 8, 16, etc., which is not particularly limited herein.
Referring to fig. 1, the housing 100 of the present embodiment is provided with a socket 170, and the rotating shaft 210 is rotatably inserted into the socket 170, so as to ensure easy assembling of the arc extinguishing member 200.
Further, the plugging hole 170 is a blind hole to ensure the safety of the circuit breaker 010. In other embodiments, the plug aperture 170 may also be a through hole.
Still further, the housing 100 is connected with a plug post 171, the plug post 171 is provided with a plug hole 170, the rotating shaft 210 is plugged with the plug hole 170, and one side of the grid 211 can be abutted with the plug post 171; by such arrangement, on the one hand, the stability and reliability of the arc extinguishing member 200 rotatably arranged on the housing 100 can be further ensured, and on the other hand, holes are not required to be formed in the housing 100, which is beneficial to ensuring the structural thickness and structural strength of the housing 100. Of course, in other embodiments, the housing 100 may be directly provided with the plugging hole 170.
It should be appreciated that in other embodiments, the rotating shaft 210 is provided with the socket 170, the housing 100 is connected with the socket post 171, and the socket post 171 is in socket engagement with the socket 170, so that the arc extinguishing member 200 can rotate around the socket post 171.
The arc extinguishing members 200 of the present embodiment are arranged in a central symmetry manner, and a horn-shaped distribution is formed between two adjacent grid plates 211 of the arc extinguishing members 200. In this way, the opening formed at the end of the two adjacent grid plates 211 far from the rotating shaft 210 is larger, so that the electric arc can more easily enter between the two grid plates 211; on the one hand, the arc can reliably push the arc extinguishing member 200 to rotate, and on the other hand, the grid plate 211 can reliably cut, cool and extinguish the arc, and the high efficiency and reliability of arc extinguishing are ensured.
Referring to fig. 2, the housing 100 of the present embodiment is provided with an arc extinguishing chamber 130 and an arc running channel 160, the arc extinguishing member 200 is rotatably disposed in the arc extinguishing chamber 130, the arc running channel 160 is communicated with the inlet 131 of the arc extinguishing chamber 130, and the arc running channel 160 is used for guiding an arc to move into the arc extinguishing chamber 130 so as to drive the arc extinguishing member 200 to rotate. By this arrangement, the arc generated during the short circuit or overload can be ensured to reliably move into the arc extinguishing chamber 130 and the arc extinguishing member 200 is driven to rotate, so that the arc can be reliably and efficiently cooled and extinguished by the arc extinguishing member 200.
Further, the arc running channel 160 is arc-shaped, and a tangent line of the arc running channel 160 at the inlet 131 forms an included angle alpha with the extending direction of at least one grating 211 adjacent to the inlet 131; in this way, when an arc enters the arc extinguishing chamber 130 from the inlet 131, the arc extinguishing member 200 can be reliably pushed to rotate, the energy loss is small, the arc extinguishing member 200 can be rapidly rotated, and the arc can be rapidly extinguished and discharged.
It should be noted that, an angle α between a tangent line of the arc runner 160 at the inlet 131 and an extending direction of at least one grating 211 adjacent to the inlet 131 may be 90 °, 88 ° or 94 °, and the like, which is not limited herein. Of course, in the preferred embodiment, the tangent line of the arc runner 160 at the inlet 131 is perpendicular or substantially perpendicular to the extending direction of the at least one grating 211 adjacent to the inlet 131, so that the arc can be more reliably ensured to rotate the arc extinguishing member 200, the energy loss is effectively reduced, the arc extinguishing member 200 can be ensured to rotate rapidly, and the arc can be rapidly extinguished and discharged.
The structure of the gate 211 may be selected as required, and the gate 211 of this embodiment has a plate-like structure.
In some embodiments, referring to fig. 3, the grid 211 is provided with an arc striking opening 212, and the arc striking opening 212 is used to guide the arc to move to push the grid 211 and rotate the arc extinguishing member 200. So set up, when producing the electric arc, partly electric arc can be direct with the bars 211 of neighbouring entry 131, and another part electric arc can pass the striking mouth 212 and move to with the bars 211 cooperation of keeping away from entry 131 relatively, and then promote the arc extinguishing piece 200 rotation reliably, ensures the speed of quenching.
Further, one end of the grating 211 is connected with the rotating shaft 210, and the other end of the grating 211 is provided with an arc striking port 212.
The arc extinguishing member 200 of the present embodiment is integrally cast, ensuring that the arc extinguishing member 200 has sufficient structural strength. In other embodiments, the grid 211 may be welded to the shaft 210, and the like, which is not particularly limited herein.
Referring to fig. 2, in the present embodiment, the arc extinguishing chamber 130 is further provided with an exhaust channel 132 and an exhaust port 133, the arc extinguishing chamber 130 has a first side 141 and a second side 142 opposite to each other, the inlet 131 is disposed on the first side 141, the exhaust channel 132 is disposed on the second side 142, and the exhaust port 133 is disposed adjacent to the second side 142; the arc can enter the arc extinguishing chamber 130 through the inlet 131, and is discharged from the exhaust passage 132 and the exhaust port 133 after being cooled by the arc extinguishing member 200. Providing the exhaust passage 132 and the exhaust port 133 at positions opposite to the inlet 131 enables the arc cut, cooled and extinguished to be reliably discharged out of the arc extinguishing chamber 130 by the centrifugal action of the arc extinguishing member 200.
Further, the arc extinguishing chamber 130 further has a third side 143 and a fourth side 144 which are oppositely disposed, the exhaust channel 132 is disposed adjacent to the third side 143, and the exhaust port 133 is disposed at the fourth side 144. In this way, the exhaust passage 132 and the exhaust port 133 can be located above and below in the vertical direction, respectively, and it is possible to further ensure that the cooled and extinguished arc is reliably discharged from the exhaust passage 132 and the exhaust port 133 by the centrifugal action provided by the arc extinguishing member 200, and to prevent the cooled and extinguished arc from returning to the position in the arc extinguishing chamber 130 or adjacent to the inlet 131.
Still further, the exhaust passage 132 is disposed opposite to the inlet 131, and the exhaust port 133 is disposed above the exhaust passage 132 so as to ensure that the arc cooled and extinguished by the arc extinguishing member 200 can be reliably discharged from the exhaust passage 132 and the exhaust port 133 by the centrifugal action provided by the arc extinguishing member 200.
Referring to fig. 2, the circuit breaker 010 of the present embodiment further includes a partition 134, wherein the partition 134 is connected to the housing 100, and the partition 134 is disposed in the exhaust passage 132 for dividing the exhaust passage 132 into two passages 135. The arc cooled and extinguished by the arc extinguishing member 200 can be discharged from the two channels 135 separated by the partition plate 134 under the centrifugal action of the arc extinguishing member 200, thereby being beneficial to preventing the air flow from being disturbed and facilitating the discharge of the air flow; meanwhile, the baffle 134 can also be used for blocking the arc metal particles, so that the arc metal particles are prevented from being discharged out of the circuit breaker along with high-temperature gas, and the problems of breakdown and the like are improved.
The housing 100 of the present embodiment is further provided with a mounting cavity 150, the circuit breaker 010 further includes an electromagnetic assembly disposed within the mounting cavity 150, and the exhaust port 133 communicates with the mounting cavity 150. So set up, the electric arc of being convenient for utilize the installation space of electromagnetic assembly to discharge after the arc extinction, prevent that the air current that passes through the arc extinction from flowing back to arc extinguishing chamber 130.
Further, the circuit breaker 010 further includes a barrier 152, the barrier 152 being connected to the case 100, the barrier 152 being disposed between the installation cavity 150 and the arc extinguishing cavity 130; the baffle 152 can effectively separate the arc extinguishing chamber 130 from the electromagnetic assembly, so as to realize pressure maintaining, arc channeling prevention and furthest reduce the adverse effect of the arc on the whole circuit breaker 010.
It should be noted that the structure and the working principle of the electromagnetic assembly are similar to those of the related art, and are not repeated here.
The structures of the fixed contact 110 and the movable contact 120 can be set as required, and the structures are similar to those of the related art. In some embodiments, after the arc generated by the separation of the moving contact 120 and the fixed contact 110 enters the arc extinguishing chamber 130 along the arc running path 160, the arc extinguishing member 200 can be driven to rotate; according to the general assembly mode of the circuit breaker 010, the arc entering the arc extinguishing chamber 130 pushes the arc extinguishing member 200 to rotate under the arc extinguishing member 200, so the arc generally does not move to the upper side of the arc extinguishing member 200, and further, the upper arc striking plate is not required to be connected with the fixed contact 110, so that the side, facing the arc extinguishing chamber 130, of the baffle 152 is shielded by the upper arc striking plate to form protection, the structure of the fixed contact 110 is simplified, and the cost is reduced.
Moreover, since the rotatable arc extinguishing member 200 can extinguish the arc efficiently and reliably, the arc is not easy to damage the fixed contact 110, and the fixed contact arc angle 111 of the fixed contact 110 can be made small, for example: the whole size, occupied space and the like of the fixed contact arc angle 111 can be small, so that the cost is reduced, and the structure is compact.
Optionally, referring to fig. 2, the circuit breaker 010 is further provided with a lower striking plate 180, and the lower striking plate 180 is disposed on a side of the third side 143 toward the fourth side 144 of the arc extinguishing chamber 130, and the structure and function thereof are similar to those of the related art, and are not repeated herein.
When the large current is short-circuited, the arc voltage generated between the moving contact 120 and the fixed contact 110 is high; after the arc is guided to the arc extinguishing member 200 by the arc runner 160 and the lower striking plate 180, the arc is cut by the grid plate 211 to become a small arc with multiple sections connected in series, the voltage can be instantaneously reduced to tens of volts by 400 volts, and the voltage is reduced, so that the arc is more easily extinguished. Further, the grating 211 may be made of a ferrous material, which is resistant to ablation, and can absorb part of arc heat during arc extinction, so as to ensure reliable cooling effect of the arc extinction member 200, and further promote efficient arc extinction.
In the case of arc extinction by the arc extinction member 200, the voltage may vary depending on the number of the gate pieces 211 and the pitch, distribution, etc. of the gate pieces 211, and is not particularly limited herein.
Referring to fig. 4, the circuit breaker 010 of the present embodiment may further include a cover 101, where the cover 101 is fastened and connected with the housing 100, so that the arc extinguishing member 200, the fixed contact 110, the moving contact 120, the electromagnetic assembly, etc. are disposed between the cover 101 and the housing 100. It should be noted that the structure of the cover 101 is similar to that of the housing 100, and will not be described herein.
The circuit breaker 010 of the present embodiment can separate the moving contact 120 from the fixed contact 110 when short-circuited or overloaded, and the generated arc can enter the arc extinguishing chamber 130 and drive the arc extinguishing member 200 to rotate, so that the arc is cut, cooled, and extinguished.
In summary, the circuit breaker 010 of the present invention can increase the arc extinguishing speed and improve the problem of low breaking capacity of the circuit breaker 010.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A circuit breaker, comprising:
a housing (100);
a stationary contact (110), the stationary contact (110) being arranged on the housing (100);
a moving contact (120), wherein the moving contact (120) is movably arranged on the shell (100), and the moving contact (120) can be contacted with or separated from the fixed contact (110); and
An arc extinguishing member (200), wherein the arc extinguishing member (200) is rotatably arranged on the shell (100); the moving contact (120) and the fixed contact (110) are mutually separated to form an arc generated during power-off protection, and the arc extinguishing piece (200) can be driven to rotate;
The arc extinguishing piece (200) comprises a rotating shaft (210) and at least two grid plates (211), wherein at least two grid plates (211) are connected with the rotating shaft (210), at least two grid plates (211) are distributed around the rotating shaft (210), and the rotating shaft (210) is rotationally connected with the shell (100);
the grid plate (211) is provided with an arc striking opening (212), and the arc striking opening (212) is used for guiding an electric arc to move to push the grid plate (211) and enabling the arc extinguishing piece (200) to rotate.
2. The circuit breaker according to claim 1, characterized in that the housing (100) is provided with an arc extinguishing chamber (130); the arc extinguishing chamber (130) is provided with an inlet (131), an exhaust channel (132) and an exhaust port (133), the arc extinguishing chamber (130) is provided with a first side (141) and a second side (142) which are opposite, the inlet (131) is arranged on the first side (141), the exhaust channel (132) is arranged on the second side (142), and the exhaust port (133) is arranged adjacent to the second side (142);
The arc extinguishing member (200) is rotatably arranged in the arc extinguishing chamber (130), and an arc can enter the arc extinguishing chamber (130) from the inlet (131) and is discharged from the exhaust channel (132) and the exhaust port (133) after being cooled by the arc extinguishing member (200).
3. The circuit breaker according to claim 2, characterized in that the arc extinguishing chamber (130) further has a third side (143) and a fourth side (144) which are oppositely distributed, the exhaust channel (132) being arranged adjacent to the third side (143), the exhaust opening (133) being arranged at the fourth side (144).
4. A circuit breaker according to claim 2 or 3, characterized in that the housing (100) is further provided with a mounting cavity (150), the circuit breaker further comprising an electromagnetic assembly arranged in the mounting cavity (150), the exhaust port (133) being in communication with the mounting cavity (150).
5. The circuit breaker according to claim 4, characterized in that a baffle (152) is provided between the installation chamber (150) and the arc extinguishing chamber (130).
6. The circuit breaker according to claim 2, further comprising a partition (134), the partition (134) being connected to the housing (100), and the partition (134) being located within the exhaust passage (132) for dividing the exhaust passage (132) into two passages (135).
7. The circuit breaker according to claim 1, wherein the housing (100) is provided with an arc extinguishing chamber (130) and an arc runner (160), the arc extinguishing member (200) is rotatably disposed in the arc extinguishing chamber (130), the arc runner (160) is in communication with an inlet (131) of the arc extinguishing chamber (130), and the arc runner (160) is used for guiding an arc to move into the arc extinguishing chamber (130) to drive the arc extinguishing member (200) to rotate.
8. The circuit breaker according to claim 7, characterized in that the arc runner (160) is arc-shaped, a tangent line of the arc runner (160) at the inlet (131) being at an angle to the direction of extension of at least one of the grid plates (211) adjacent to the inlet (131).
9. A circuit breaker according to any of claims 1-3 or 6-8, characterized in that the arc extinguishing members (200) are arranged centrally symmetrically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111638583.7A CN114300319B (en) | 2021-12-29 | 2021-12-29 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN114300319B true CN114300319B (en) | 2024-05-24 |
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| CN206116329U (en) * | 2016-10-26 | 2017-04-19 | 杭州泰姆电气有限公司 | Breaker |
| CN206312799U (en) * | 2016-11-16 | 2017-07-07 | 上海西屋投资有限公司 | Novel breaker arc extinguishing room |
| CN108987152A (en) * | 2018-07-31 | 2018-12-11 | 平高集团威海高压电器有限公司 | A kind of arc-chutes and breaker |
| CN110349794A (en) * | 2019-06-20 | 2019-10-18 | 公牛集团股份有限公司 | A kind of breaker |
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| CN111092006A (en) * | 2018-10-23 | 2020-05-01 | 江苏高博锐电气有限公司 | Dynamic arc extinguishing system |
| CN111725014A (en) * | 2020-07-22 | 2020-09-29 | 乐清东海电器有限公司 | Arc control device of dual-power switch |
| CN211858455U (en) * | 2019-09-18 | 2020-11-03 | 张先慧 | Circuit breaker with arc extinguishing structure |
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| RU2366022C1 (en) * | 2008-07-14 | 2009-08-27 | Общество с ограниченной ответственностью "Технос" | Arc-extinguishing system |
| CN206116329U (en) * | 2016-10-26 | 2017-04-19 | 杭州泰姆电气有限公司 | Breaker |
| CN206312799U (en) * | 2016-11-16 | 2017-07-07 | 上海西屋投资有限公司 | Novel breaker arc extinguishing room |
| CN110419089A (en) * | 2017-11-01 | 2019-11-05 | 苏州专创光电科技有限公司 | A kind of arc-extinguishing mechanism of the power circuit breaker based on gear |
| CN108987152A (en) * | 2018-07-31 | 2018-12-11 | 平高集团威海高压电器有限公司 | A kind of arc-chutes and breaker |
| CN111092006A (en) * | 2018-10-23 | 2020-05-01 | 江苏高博锐电气有限公司 | Dynamic arc extinguishing system |
| CN110349794A (en) * | 2019-06-20 | 2019-10-18 | 公牛集团股份有限公司 | A kind of breaker |
| CN211858455U (en) * | 2019-09-18 | 2020-11-03 | 张先慧 | Circuit breaker with arc extinguishing structure |
| CN111725014A (en) * | 2020-07-22 | 2020-09-29 | 乐清东海电器有限公司 | Arc control device of dual-power switch |
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| CN114300319A (en) | 2022-04-08 |
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