CN218385095U - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
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- CN218385095U CN218385095U CN202222771059.3U CN202222771059U CN218385095U CN 218385095 U CN218385095 U CN 218385095U CN 202222771059 U CN202222771059 U CN 202222771059U CN 218385095 U CN218385095 U CN 218385095U
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- circuit breaker
- connecting plate
- arc
- plate
- arc striking
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Abstract
A circuit breaker belongs to the technical field of low-voltage electrical appliances. The circuit breaker comprises a moving contact and a fixed contact, wherein the moving contact and the fixed contact are closed and opened to realize the connection and disconnection of the circuit; the arc extinguish chamber is used for extinguishing electric arcs generated when the movable contact and the fixed contact are disconnected; a circuit breaker connecting plate for connecting the circuit breaker with the outside; the arc striking piece is used for quickly introducing an arc generated when the circuit breaker is disconnected into the arc extinguishing chamber; characterized in that the striking piece includes a connecting plate and one along one side downwardly extending's of connecting portion striking portion, connecting plate and striking portion integrated into one piece, the connecting plate is located circuit breaker connecting plate below and contacts with the circuit breaker connecting plate, is provided with the screw thread that is used for fastening external conductor and circuit breaker connecting plate on the connecting plate. The advantages are that: the structure requirement of good integrated design is reflected, compared with the prior art, the connecting terminal, the nut and the sealing plug which are used as fasteners are abandoned, and therefore, the number of parts is reasonably reduced, and the economy is reflected.
Description
Technical Field
The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker.
Background
A circuit breaker is a critical component in an electrical distribution system for protection of lines and utilities from overload, short circuits, negative voltage, etc., by which to break, i.e., open, fault circuits caused by, for example, overload, short circuits, and undervoltage.
As known in the art, high-temperature electric arcs are generated when a moving contact and a static contact of a circuit breaker are separated, in order to quickly and effectively extinguish arcs, an arc extinguishing chamber system is generally arranged in the circuit breaker and at a position close to the moving contact and the static contact, the electric arcs generated when the moving contact and the static contact are separated are effectively led into the arc extinguishing system through arc striking sheets, and then the electric arcs are cut by arc extinguishing sheets (also called as arc extinguishing grid sheets) in an arc extinguishing chamber of a structural system of the arc extinguishing chamber system until the electric arcs are extinguished, so that adverse effects of the electric arcs on burning of other parts in the circuit breaker are prevented. Meanwhile, the arc temperature generated between the contacts is too high or the duration time generated by the arc is too long, so that the arc cannot be quickly and effectively extinguished in the arc extinguishing chamber system, and the arc runs out of the arc extinguishing chamber system, and further burns out or damages other parts in the circuit breaker to influence the normal use of the circuit breaker.
As is also known in the art, the wiring terminals in circuit breakers function to electrically connect the cables of the power distribution system to the low voltage circuit breakers, and whether the wiring terminal structure is rational or not determines whether the connection of the cables of the power distribution system to the low voltage circuit breakers is reliable and whether the installation is convenient and efficient.
Fig. 4 shows an arc striking plate of a circuit breaker in the prior art, an arc extinguishing chamber 6 of a structural system of the arc extinguishing chamber system is disposed near a movable contact 4 and a fixed contact 5, an arc striking portion of the arc striking plate 1, which plays a role of guiding an electric arc, is disposed between the movable contact 4 and the arc extinguishing chamber 6, an arc striking plate of one end of the arc striking plate 1 (i.e., an upper end of a position state shown in fig. 4) is attached to a circuit breaker connecting plate 7 and fixed to the circuit breaker connecting plate 7 serving as a connecting terminal through a screw 8, while the other end of the arc striking plate 1 (i.e., a lower end of the position state shown in fig. 4) extends to the arc extinguishing chamber 6, a terminal plastic part 2 is mounted on a base not shown in the figure, a nut serving as a fastening member 3 is embedded in the terminal plastic part 2, and an external lead, which is also not shown in the figure, is fixed to the nut serving as the fastening member 3 through a mounting screw, for connecting the circuit breaker with the outside. The wiring terminal with the structure has the disadvantages of complicated installation mode and high use cost.
SUMMERY OF THE UTILITY MODEL
The task of the utility model is to provide a structure requirement that helps satisfying good integrated design and can abandon binding post again and rationally reduce spare part figure and embody the striking piece of economic nature's circuit breaker.
The utility model aims to solve the problems that the circuit breaker comprises a moving contact and a static contact, wherein the moving contact and the static contact are closed and opened to realize the connection and disconnection of a circuit; the arc extinguishing chamber is used for extinguishing electric arcs generated when the movable contact and the fixed contact are disconnected; a circuit breaker connecting plate for connecting the circuit breaker with the outside; the arc striking piece is used for quickly introducing an electric arc generated when the circuit breaker is disconnected into the arc extinguishing chamber; characterized in that the arc striking piece comprises a connecting plate and an arc striking part extending downwards along one side of the connecting part, the connecting plate and the arc striking part are integrally formed, the connecting plate is positioned below the circuit breaker connecting plate and is in contact with the circuit breaker connecting plate, and threads used for fastening an external conductor and the circuit breaker connecting plate are arranged on the connecting plate.
In a specific embodiment of the present invention, the arc striking portion includes an arc striking angle, an inclined portion and an arc striking plate, the arc striking angle is located between the connecting plate and the inclined portion, the inclined portion is located between the arc striking angle and the arc striking plate, and the arc striking plate is located below the inclined portion.
In another specific embodiment of the present invention, a connection hole is formed on the connection plate, and a stack ring protruding from a surface of a side of the connection plate facing downward is formed on a side of the connection plate facing downward and around the connection hole.
In yet another specific embodiment of the present invention, the connecting holes and the stack rings are concentric with each other, and the screw threads are formed on the inner walls of the connecting holes and the stack rings.
In another specific embodiment of the present invention, a mounting hole is opened on the connecting plate, and the connecting plate is fixed to the circuit breaker by a screw at a position corresponding to the mounting hole.
The utility model discloses a still have a concrete embodiment, the circuit breaker has external wire of circuit breaker or female arranging, and this external wire of circuit breaker or female arranging pass through the connecting plate is fixed with the circuit breaker.
The technical scheme provided by the utility model the technical effect lie in: the structure system of the arc striking piece comprises a connecting plate and an arc striking part, the connecting plate and the arc striking part are integrally formed, the connecting plate is located below the circuit breaker connecting plate and is in contact with the circuit breaker connecting plate, and threads used for fastening an external conductor and the circuit breaker connecting plate are arranged on the connecting plate, so that the structural requirement of good integrated design can be embodied, and compared with the prior art, a connecting terminal, a nut and a sealing plug serving as a fastening piece are abandoned, so that the number of parts is reasonably reduced, and the economical efficiency can be embodied.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention.
Fig. 2 is a perspective view of the arc runner shown in fig. 1.
Fig. 3 is a schematic view of a stack ring formed on a downward-facing side of the arc striking part shown in fig. 1 and 2 and corresponding to the connection hole.
Fig. 4 is a schematic view of an arc runner of a circuit breaker in the prior art.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, but the embodiments are not limited to the technical solutions, and any changes in form and not in essence according to the present invention should be regarded as the protection scope of the present invention.
In the following description, all the concepts related to the directions of up, down, left, right, front and rear or the directional property are based on the position state of fig. 1 for the convenience of the public, and thus cannot be understood as a particular limitation to the technical solution provided by the present invention.
Referring to fig. 1, there is shown an arc runner 1 for rapidly introducing an arc generated when a circuit breaker is broken into an arc extinguishing chamber, which will be mentioned later, the arc runner 1 including a connecting plate 11 (also referred to as a "fixed connecting plate", hereinafter) and an arc striking portion 12 extending downward along one side of the connecting plate 11, i.e., along a right side of the connecting plate 11, the connecting plate 11 being integrally formed with the arc striking portion 12, the connecting plate 11 being located below a circuit breaker connecting plate 7 and contacting the circuit breaker connecting plate 7, and a screw 113 for fastening an external conductor to the circuit breaker connecting plate 7 being provided on the connecting plate 11. The arc striking portion 12 includes an arc striking angle 121, an inclined portion 122 and an arc striking plate 123, wherein the arc striking angle 121 is formed by folding and unfolding one side (i.e., the right side in the position state shown in fig. 1) of the connecting plate 11 close to the arc striking angle 121, that is, since the arc striking angle 121 is formed by folding and unfolding the right side of the connecting plate 11, and since the inclined portion 122 is formed by folding and unfolding the inclined portion 122 downward in a state of being inclined to the left from the lower portion of the arc striking angle 121, the arc striking angle 121 is located between the connecting plate 11 and the inclined portion 122, and since the arc striking plate 123 is formed by folding and unfolding the arc striking plate 123 downward in a longitudinal state from the end of the inclined portion 122, the inclined portion 122 is located between the arc striking angle 121 and the arc striking plate 123, and the arc striking plate 123 is naturally located below the inclined portion 122.
Fig. 1 also shows a moving contact 4, a fixed contact 5, an arc extinguishing chamber 6 and a circuit breaker connecting plate 7 of the structural system of the circuit breaker, the aforementioned arc striking plate 1 is substantially located on one side of the moving contact 4 (left side of the state shown in fig. 1), and an arc striking portion 12 of the structural system of the arc striking plate 1 is located between the moving contact 4 and the arc extinguishing chamber 6, and mainly plays a role of striking an arc (i.e., guiding an electric arc). The arc striking portion 12 is located between the movable contact 4 and the arc extinguishing chamber 6, and thus functions to conduct an arc.
Referring to fig. 2 and fig. 3 in conjunction with fig. 1, a connection hole 111 is formed on the connection plate 11, and a stack ring 112 protruding from a surface of the downward side of the connection plate 11 is formed on the downward side of the connection plate 11 and around the connection hole 111. The connection hole 111 and the stack ring 112 are concentric with each other, and a screw thread 113 (shown in fig. 3) is formed on each of the inner walls of the connection hole 111 and the stack ring 112.
The connecting plate 11 having a substantially rectangular shape is provided with mounting holes 114, the number of which is not limited to the number shown in fig. 1 to 3, so long as the purpose of fixing the connecting plate 11 to the circuit breaker can be achieved, and the connecting plate 11 and the circuit breaker are fixed by screws 8 shown in fig. 1 at positions corresponding to the mounting holes 114.
As shown in fig. 1, the connecting plate 11 of the arc runner 1 is attached to the breaker connecting plate 7, and the connecting plate 11 is fixed to the breaker connecting plate 7 by the screw 8 at a position corresponding to the mounting hole 114, thereby fixing the breaker to the breaker. The circuit breaker has external wire of circuit breaker or female arranging, and this external wire of circuit breaker and female arranging pass through connecting plate 11 and circuit breaker is fixed.
When the circuit breaker normally operates, the moving contact 4 contacts the fixed contact 5 (conventionally referred to as "close"), and when the circuit breaker breaks the fault current in the circuit, the moving contact 4 and the fixed contact 5 are separated (conventionally referred to as "divide"), an electric arc is generated between the moving contact 4 and the fixed contact 5, the arc striking angle 121 connects the electric arc on the moving contact 4, the electric arc is led to one end (namely the left end of the position state shown in fig. 1) of the arc extinguishing chamber 6 through the inclined part 122 (also referred to as "extension part") by the arc striking plate 123, and the electric arc is cut by the arc extinguishing grid sheet in the arc extinguishing chamber 6 until the electric arc is extinguished.
To sum up, the technical solution provided by the present invention remedies the defects in the prior art, successfully completes the invention task, and faithfully embodies the technical effects mentioned in the above technical effect column by the applicant.
Claims (6)
1. A circuit breaker comprises a moving contact (4) and a fixed contact (5), wherein the moving contact (4) and the fixed contact (5) are closed and opened to realize the connection and disconnection of a circuit; the arc extinguishing chamber (6) is used for extinguishing electric arcs generated when the movable and static contacts are disconnected; a breaker connection plate (7) for connecting the breaker with the outside; the arc striking piece (1) is used for quickly introducing electric arcs generated when the circuit breaker is switched off into an arc extinguishing chamber (6); the arc striking piece is characterized in that the arc striking piece (1) comprises a connecting plate (11) and an arc striking part (12) extending downwards along one side of the connecting part, the connecting plate (11) and the arc striking part (12) are integrally formed, the connecting plate (11) is located below the circuit breaker connecting plate (7) and is in contact with the circuit breaker connecting plate (7), and threads (113) used for fastening an external conductor and the circuit breaker connecting plate (7) are arranged on the connecting plate (11).
2. A circuit breaker as claimed in claim 1, characterized in that the run-on portion (12) comprises a run-on angle (121), an inclined portion (122) and a run-on plate (123), the run-on angle (121) being located between the connecting plate (11) and the inclined portion (122), the inclined portion (122) being located between the run-on angle (121) and the run-on plate (123), the run-on plate (123) being located below the inclined portion (122).
3. The circuit breaker according to claim 1, wherein a connecting hole (111) is formed in the connecting plate (11), and a stack ring (112) protruding from a surface of the downward side of the connecting plate (11) is formed around the connecting hole (111) on the downward side of the connecting plate (11).
4. A circuit breaker according to claim 3 wherein said attachment hole (111) and said stack ring (112) are concentric with each other, and said screw thread (113) is formed on the inner wall of the attachment hole (111) and the stack ring (112).
5. The circuit breaker according to claim 1, wherein the connecting plate (11) is provided with mounting holes (114), and the connecting plate (11) is fixed to the circuit breaker by screws (8) at positions corresponding to the mounting holes (114).
6. A circuit breaker according to claim 1 or 5, characterized in that the circuit breaker has a circuit breaker external conductor or busbar, which is fixed to the circuit breaker by the connecting plate (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222771059.3U CN218385095U (en) | 2022-10-20 | 2022-10-20 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222771059.3U CN218385095U (en) | 2022-10-20 | 2022-10-20 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218385095U true CN218385095U (en) | 2023-01-24 |
Family
ID=84931922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222771059.3U Active CN218385095U (en) | 2022-10-20 | 2022-10-20 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218385095U (en) |
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2022
- 2022-10-20 CN CN202222771059.3U patent/CN218385095U/en active Active
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