CN215988642U - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
CN215988642U
CN215988642U CN202121909740.9U CN202121909740U CN215988642U CN 215988642 U CN215988642 U CN 215988642U CN 202121909740 U CN202121909740 U CN 202121909740U CN 215988642 U CN215988642 U CN 215988642U
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CN
China
Prior art keywords
arc
piece
arc striking
circuit breaker
groove
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Active
Application number
CN202121909740.9U
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Chinese (zh)
Inventor
谢昕
黄珏
戴安彩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Chuangqi Electric Co ltd
Original Assignee
Zhejiang Chuangqi Electric Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to CN202121909740.9U priority Critical patent/CN215988642U/en
Application granted granted Critical
Publication of CN215988642U publication Critical patent/CN215988642U/en
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Abstract

A circuit breaker is provided. The problem that the existing circuit breaker without an arc extinguish chamber is difficult to conduct an arc is mainly solved. The method is characterized in that: a first arc striking piece (4) is arranged in the shell opposite to the movable contact piece, a second arc striking piece (5) is arranged opposite to the static contact piece, and an arc striking channel (6) communicated with the first through groove is formed between the first arc striking piece and the second arc striking piece; and an arc striking part (51) and a second through groove (52) with a rectangular cross section are arranged on the second arc striking plate and opposite to the lower end of the static contact plate. The utility model provides a circuit breaker, which can realize the functions of arc guiding and gas guiding through an arc guiding part and a through groove on a second arc guiding sheet, can realize the processing of electric arcs in a limited space, is safer to use, and further has a certain function of preventing back spraying.

Description

Circuit breaker
Technical Field
The utility model relates to the field of low-voltage electric appliances, in particular to a circuit breaker.
Background
A circuit breaker is a switching device for cutting off and closing a load circuit and cutting off a fault circuit to prevent an accident from being enlarged, thereby ensuring safe operation of the load circuit.
At present, some circuit breakers are not provided with an arc extinguishing chamber due to the consideration of installation space, and thus, how to guide arc becomes a problem which needs to be solved.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the background art, the utility model provides a circuit breaker, which mainly solves the problem that the circuit breaker without an arc extinguish chamber is difficult to conduct arc.
The specific scheme of the utility model is as follows:
a circuit breaker comprises a shell, wherein a movable contact piece and a static contact piece are arranged in the shell, a first through groove is formed in the shell in a penetrating mode, a first arc striking piece is arranged in the shell opposite to the movable contact piece, a second arc striking piece is arranged opposite to the static contact piece, and an arc striking channel communicated with the first through groove is formed between the first arc striking piece and the second arc striking piece;
and an arc striking part and a second through groove with a rectangular cross section are arranged on the second arc striking plate and opposite to the lower end of the static contact plate.
The shell is internally provided with an annular bulge, an air cavity is formed in the annular bulge, the static contact piece is provided with a static contact, and the air cavity is arranged opposite to the static contact.
The second arc striking piece comprises an arc guiding piece and a blocking piece, the arc guiding piece is connected with the blocking piece through an arc piece, and the arc striking part and the second through groove are arranged on the arc piece.
The arc-shaped piece faces the fixed contact.
A first arc striking channel is formed between the blocking piece and the arc guiding piece, a second arc striking channel is formed between the blocking piece and the first arc striking piece, and the blocking piece and the front end of the arc guiding piece are oppositely arranged and used for blocking gas back spraying.
And a buffer cavity is also arranged between the arc striking channel and the first through groove, and an air filtering device is arranged in the buffer cavity.
The air filtering device comprises a wavy main board, the main board divides the buffer cavity into a plurality of sub-buffer cavities, and a plurality of first through holes communicated with the sub-buffer cavities are formed in the main board.
The buffer cavity comprises an inlet, and a second through hole which is arranged corresponding to the inlet is formed in the main board.
And a notch groove is formed in the first arc striking plate opposite to the inlet.
The arc striking channel is connected with the buffer cavity through a long and narrow connecting channel.
The utility model has the beneficial effects that: the utility model provides a circuit breaker, which can realize the functions of arc guiding and gas guiding through an arc guiding part and a through groove on a second arc guiding sheet, can realize the processing of electric arcs in a limited space, is safer to use, and further has a certain function of preventing back spraying.
Drawings
Fig. 1 is a schematic view of the internal structure of an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a point a in fig. 1.
Fig. 3 is an enlarged schematic view of fig. 1 at B.
Fig. 4 is a schematic view of a second arc runner according to an embodiment of the present invention.
Fig. 5 is a schematic view of a first arc runner according to an embodiment of the present invention.
Fig. 6 is a schematic view of an air filter device according to an embodiment of the present invention.
Fig. 7 is a schematic view of the internal structure of an embodiment of the present invention.
Detailed Description
The utility model will be further described with reference to the accompanying drawings in which: as shown in the figures, the circuit breaker comprises a shell 1, wherein a movable contact piece 2 and a static contact piece 3 are arranged in the shell, a first through groove 11 is arranged on the shell in a penetrating manner, a first arc striking piece 4 is arranged in the shell opposite to the movable contact piece, a second arc striking piece 5 is arranged in the shell opposite to the static contact piece, and an arc striking channel 6 communicated with the first through groove is formed between the first arc striking piece and the second arc striking piece; and an arc striking part 51 and a second through groove 52 with a rectangular cross section are arranged on the second arc striking plate opposite to the lower end of the static contact plate. Be equipped with the moving contact on the movable contact piece, be equipped with the static contact on the static contact, can produce electric arc and high-temperature gas when the movable contact and the static contact separate, this gaseous partly through the second lead to the groove then enter into the striking passageway, this electric arc can be attracted by striking portion, and then with first striking between the piece prolong extinguish, greatly increased the security of using.
The utility model provides a circuit breaker, which can realize the functions of arc guiding and gas guiding through an arc guiding part on a second arc guiding sheet and a second through groove with a rectangular cross section, can realize the processing of electric arcs in a limited space and is safer to use.
In the utility model, as shown in the figure, an annular protrusion 12 is arranged in the housing, an air cavity 121 is formed in the annular protrusion, a static contact 31 is arranged on the static contact, and the air cavity is arranged opposite to the static contact. The gas can be firstly gathered in the gas cavity and then sent out, which is more beneficial to gas guiding.
In the present invention, as shown in the figure, the second arc striking plate includes an arc guiding plate 53 and a blocking plate 54, the arc guiding plate is connected to the blocking plate through an arc plate 55, and the arc striking portion and the second through groove are disposed on the arc plate. At this arc piece, the junction of leading arc piece and separation blade promptly sets up the second that arc guiding portion and cross section are the rectangle and leads to the groove, and the effect of arc and air guide is led in realization that can be better, and its position is comparatively close in the static contact, and on the other hand, partly gaseous leads to the groove back through the second, can continue to advance along the inner wall that leads the arc piece, then outside the first logical groove discharge casing.
In the present invention, as shown in the figure, the arc-shaped piece faces the fixed contact. The arc striking and gas guiding functions can be better realized.
In the utility model, as shown in the figure, a first arc striking channel 61 is formed between the blocking piece and the arc guiding piece, a second arc striking channel 62 is formed between the blocking piece and the first arc striking piece, and the blocking piece and the front end of the arc guiding piece are oppositely arranged for blocking gas back spraying. When gas is reversely sprayed, a part of the gas can advance along the direction of the tangent line K of the arc guiding sheet and then is blocked by the blocking sheet, so that the speed and the quantity of reverse spraying can be greatly reduced, and the gas reverse spraying device is safer to use.
In the utility model, as shown in the figure, a buffer cavity 13 is further arranged between the arc striking channel and the first through groove, and an air filtering device 7 is arranged in the buffer cavity. The buffer cavity can reduce the speed of gas sprayed out of the shell, and the use is safer.
In the present invention, as shown in the figure, the air filtering device includes a wavy main plate 71, the main plate divides the buffer cavity into a plurality of sub-buffer cavities 131, and the main plate is provided with a first through hole 711 for communicating the sub-buffer cavities. The flow velocity of the gas can be greatly reduced, and the first through hole can better adsorb the possible electric sparks.
In the present invention, as shown in the figure, the buffer chamber includes an inlet 132, and the main board is provided with a second through hole 712 corresponding to the inlet. The second through hole is directed towards the inlet for gas to enter the buffer chamber.
In the present invention, as shown in the figure, the first arc striking plate is provided with a notch groove 41 opposite to the inlet. The gas can enter the buffer cavity conveniently.
In the present invention, as shown in the figure, the arc ignition channel and the buffer chamber are connected 14 through a long and narrow connecting channel. The gas can be cooled better, and the effect of preventing back spray can be achieved to a certain extent.
The embodiments described with reference to the drawings are illustrative and are intended to be illustrative of the utility model and should not be construed as limiting the utility model. The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims (7)

1. The utility model provides a circuit breaker, includes casing (1), be equipped with movable contact (2) and static contact (3) in the casing, be equipped with the first logical groove (11) that run through the setting on the casing, its characterized in that: a first arc striking piece (4) is arranged in the shell opposite to the movable contact piece, a second arc striking piece (5) is arranged opposite to the static contact piece, and an arc striking channel (6) communicated with the first through groove is formed between the first arc striking piece and the second arc striking piece;
and an arc striking part (51) and a second through groove (52) with a rectangular cross section are arranged on the second arc striking plate and opposite to the lower end of the static contact plate.
2. A circuit breaker according to claim 1, wherein: an annular bulge (12) is arranged in the shell, an air cavity (121) is formed in the annular bulge, a static contact (31) is arranged on the static contact, and the air cavity and the static contact are arranged oppositely.
3. A circuit breaker according to claim 2, wherein: the second arc striking piece comprises an arc guiding piece (53) and a blocking piece (54), the arc guiding piece is connected with the blocking piece through an arc piece (55), and the arc striking part and the second through groove are arranged on the arc piece.
4. A circuit breaker according to claim 3, wherein: the arc-shaped piece faces the fixed contact.
5. A circuit breaker according to claim 3, wherein: a first arc striking channel (61) is formed between the blocking piece and the arc guiding piece, a second arc striking channel (62) is formed between the blocking piece and the first arc striking piece, and the blocking piece and the front end of the arc guiding piece are oppositely arranged and used for blocking gas back spraying.
6. A circuit breaker according to claim 1, wherein: a buffer cavity (13) is further arranged between the arc striking channel and the first through groove, and an air filtering device (7) is arranged in the buffer cavity.
7. A circuit breaker according to claim 6, wherein: the air filtering device comprises a wavy main board (71), the main board divides the buffer cavity into a plurality of sub-buffer cavities (131), and a plurality of first through holes (711) communicated with the sub-buffer cavities are formed in the main board.
CN202121909740.9U 2021-08-16 2021-08-16 Circuit breaker Active CN215988642U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121909740.9U CN215988642U (en) 2021-08-16 2021-08-16 Circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121909740.9U CN215988642U (en) 2021-08-16 2021-08-16 Circuit breaker

Publications (1)

Publication Number Publication Date
CN215988642U true CN215988642U (en) 2022-03-08

Family

ID=80519078

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121909740.9U Active CN215988642U (en) 2021-08-16 2021-08-16 Circuit breaker

Country Status (1)

Country Link
CN (1) CN215988642U (en)

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GR01 Patent grant
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang.

Patentee after: Zhejiang Chuangqi Electric Co.,Ltd.

Address before: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang.

Patentee before: ZHEJIANG CHUANGQI ELECTRIC Co.,Ltd.