An arc initiation patch assembly and circuit breaker

Abstract

The utility model relates to an arc leading piece assembly and circuit breaker, and the arc leading piece assembly is arranged on the base of the circuit breaker, and the wiring terminal is arranged on the base, wherein the arc leading piece assembly comprises an arc leading piece and a fastener, the arc leading piece comprises a mounting portion, an arc leading portion and a connecting portion, the mounting portion is provided with a first mounting hole, the fastener is arranged in the first mounting hole to connect the mounting portion and the wiring terminal, compared with the prior art, the mounting portion of the arc leading piece is connected with the wiring terminal by the mode that the fastener is arranged in the first mounting hole, the mounting reliability of the wiring terminal and the arc leading piece is improved by the mutual fixation of the wiring terminal and the arc leading piece, and furthermore, the wiring terminal and the arc leading piece are in contact, so that they form more reliable equipotential bodies, and the arc leading piece is more conducive to arc transfer.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to an arc-starting plate assembly and a circuit breaker. Background Technology

[0002] During the opening, closing, and tripping processes of a circuit breaker, rapid energy release and high-speed impacts on components are involved. During closing, the moving contact impacts the stationary contact at high speed; during opening, the main shaft impacts the stop pin; and the spring releases stored energy, causing a sudden acceleration. All of these factors excite overall mechanical vibration of the circuit breaker. This is part of the normal operating characteristics of a circuit breaker and cannot be avoided.

[0003] After prolonged operation, vibrations in circuit breakers can cause loosening, wear, deformation, or displacement of terminals or arc-striking plates. These are the most common failure modes, ultimately leading to problems such as increased contact resistance, localized overheating, and insulation deterioration, affecting the performance and safety of the circuit breaker.

[0004] Therefore, it is necessary to develop a new type of arc-striking plate assembly and circuit breaker to improve some of the problems existing in the related technologies. Summary of the Invention

[0005] The purpose of this invention is to provide an arc-starting plate assembly and a circuit breaker that can effectively improve the mechanical reliability of the terminals and the arc-starting plate.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] The arc-starting plate assembly provided by this utility model includes an arc-starting plate and a fastener; the arc-starting plate includes a mounting part, an arc-starting part, and a connecting part; the connecting part connects the mounting part and the arc-starting part; the mounting part is provided with a first mounting hole, and the fastener is disposed in the first mounting hole for connecting the terminal block on the circuit breaker.

[0008] Furthermore, the mounting part also includes a second mounting hole, and the fastener is disposed in the second mounting hole for connecting the base of the circuit breaker.

[0009] Furthermore, the connecting portion creates a certain gap between the mounting portion and the arc-drawing portion, and the end of the fastener is accommodated within the gap.

[0010] The circuit breaker assembly provided by this utility model includes a base, the aforementioned arc-starting plate assembly, and a terminal block; the arc-starting plate assembly is disposed on the base; the terminal block is disposed on the base; wherein, the arc-starting plate assembly includes an arc-starting plate and a fastener; the arc-starting plate includes a mounting portion, an arc-starting portion, and a connecting portion; the mounting portion is provided with a first mounting hole, and the fastener is disposed in the first mounting hole to connect the mounting portion and the terminal block.

[0011] Furthermore, the mounting part also includes a second mounting hole, and the fastener is disposed in the second mounting hole to connect the mounting part and the terminal block.

[0012] Furthermore, one of the fasteners simultaneously connects the base and the terminal block.

[0013] Furthermore, the base includes a base partition, the base partition and the terminal block are at the same height, the end of the base partition and the end of the terminal block together form a connection hole, and the fastener is disposed in the connection hole.

[0014] Furthermore, the base includes a base partition, and the wiring terminal, the base partition, and the mounting part are stacked. Both the base partition and the wiring terminal are provided with connection holes, and the fasteners are disposed in the two connection holes.

[0015] Furthermore, there is an angle between the connecting part and the mounting part, the angle of which makes the surface of the connecting part parallel to the surface of the moving contact after the circuit breaker moving contact has been opened and rotated, in order to avoid contact with the moving contact.

[0016] Furthermore, there is an angle between the connecting part and the arc-drawing part, and the structure of the angle matches the end shape of the moving contact of the circuit breaker.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model connects the mounting part of the arc-starting plate to the terminal block by fastening it to the first mounting hole. The mutual fixation of the terminal block and the arc-starting plate improves their installation reliability. Furthermore, the contact between the terminal block and the arc-starting plate creates a more reliable equipotential body. When a short circuit occurs, the moving and stationary contacts open and generate an arc. Current flows through the moving contact, and as the moving contact moves, the arc also moves towards the arc-starting plate. As the arc jumps from the moving contact to the arc-starting plate, the current flows through both the terminal block and the arc-starting plate. The moving contact experiences little or no current, reducing the degree to which it is burned by the arc. In addition, the equipotential body reduces the contact resistance between the terminal block and the arc-starting plate, decreasing the tendency for current to remain on the moving contact and facilitating the transfer of the arc by the arc-starting plate.

[0019] 2. This utility model connects the mounting part of the arc-inducing plate, the terminal block and the base by setting fasteners in the first mounting hole and the second mounting hole, which is more conducive to improving the overall rigidity of the three, reducing vibration, extending fatigue life and improving the installation reliability of each other.

[0020] 3. This utility model sets an inclination angle between the connecting part and the mounting part on the arc-starting plate. This inclination angle makes the connecting part parallel to the surface of the moving contact after the circuit breaker is opened, leaving a certain gap. This avoids the moving contact from contacting the arc-starting plate after the circuit breaker is opened. It can prevent the moving contact and the arc-starting plate from being welded together by metal particles under the action of the short-circuit current, thereby improving the reliability of the circuit breaker. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the arc-inducing plate in Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the arc-inducing plate in Embodiment 2 of this utility model;

[0023] Figure 3 This is a schematic diagram of the circuit breaker in Embodiment 3 of this utility model;

[0024] Figure 4 This is a schematic diagram of the circuit breaker in Embodiment 5 of this utility model;

[0025] Figure 5 for Figure 4 The diagram shows the fit between the arc-starting plate and the base partition.

[0026] Figure 6 for Figure 4 The diagram shows the connection between the base partition and the wiring terminals.

[0027] Figure label:

[0028] 1. Arc-starting plate; 11. Mounting part; 111. First mounting hole; 112. Second mounting hole; 12. Connecting part; 13. Arc-starting part; 2. Fastener; 3. Base partition; 4. Terminal block; 5. Moving contact; 6. Limiting structure. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0030] Example 1

[0031] This utility model provides an arc-inducing plate assembly, referring to... Figure 1 The arc-starting plate assembly includes an arc-starting plate 1 and a fastener 2; the arc-starting plate 1 includes a mounting part 11, an arc-starting part 13 and a connecting part 12; the connecting part 12 connects the mounting part 11 and the arc-starting part 13; the mounting part 11 is provided with a first mounting hole 111, and the fastener 2 is disposed in the first mounting hole 111 for connecting the terminal block 4 on the circuit breaker.

[0032] In this embodiment, refer to Figure 1 The mounting part 11, the arc-inducing part 13, and the connecting part 12 of the arc-inducing piece 1 are formed by bending a long strip of plate material.

[0033] In this embodiment, the connecting part 12 creates a certain gap between the mounting part 11 and the arc-drawing part 13, and the end of the fastener 2 is accommodated in the gap.

[0034] In this embodiment, the elongated plate-like material has two side surfaces facing opposite directions. After bending to one side at the first bending position on the material, a mounting portion 11 and a connecting portion 12 are formed on both sides of the first bending. After bending along the same side at the second bending position on the connecting portion 12, a connecting portion 12 and an arc-drawing portion 13 are formed on both sides of the second bending position. Since the two bending directions are the same, a certain gap is formed between the mounting portion 11 and the arc-drawing portion 13. The end of the fastener 2 provided on the first mounting hole 111 or the second mounting hole 112 is accommodated in the gap.

[0035] In this embodiment, the arc-initiating part 13 also includes a third bend position, both sides of which are used to guide the transfer of electric arc.

[0036] In this embodiment, the fastener 2 can be a detachable fastener 2 such as a screw, bolt, or stud.

[0037] Example 2

[0038] This embodiment of the utility model provides an arc-inducing plate assembly, the basic structure of which is the same as that of Embodiment 1, as described below. Figure 2 The improvement is that in this embodiment, the mounting part 11 also includes a second mounting hole 112, and the fastener 2 is disposed in the second mounting hole 112 for connecting the base of the circuit breaker.

[0039] In this embodiment, the first mounting hole 111 and the second mounting hole 112 can be arranged along the length or width direction of the mounting portion 11.

[0040] In this embodiment, the side of the mounting part 11 is provided with a groove, which is located between the first mounting hole and the second mounting hole.

[0041] Example 3

[0042] This embodiment provides a circuit breaker, which uses the arc-starting plate assembly provided in Embodiment 1, and refers to... Figure 3The circuit breaker includes a base, an arc-starting plate assembly, and a terminal block 4. The arc-starting plate assembly is disposed on the base. The terminal block 4 is disposed on the base. The arc-starting plate assembly includes an arc-starting plate 11 and a fastener 2. The arc-starting plate 1 includes a mounting part 11, an arc-starting part 13, and a connecting part 12. The mounting part 11 is provided with a first mounting hole 111, and the fastener 2 is disposed in the first mounting hole 111 to connect the mounting part 11 and the terminal block 4.

[0043] In this embodiment, refer to Figure 3 A fastener 2 passes through the first mounting hole 111 and simultaneously connects the base and the terminal block 4.

[0044] In this embodiment, refer to Figure 3 The base includes a base partition 3, which separates the arc-extinguishing chamber from other components of the circuit breaker. The base partition 3 and the terminal block 4 are at the same height. The ends of the base partition 3 and the terminals 4 abut against each other. The mounting part 11 of the arc-extinguishing plate 1 is laid on the surface of the base partition 3 and the terminal block 4. The ends of the base partition 3 and the terminals 4 are provided with grooves. The two end grooves are combined to form a connecting hole. A fastener 2 passes through the first mounting hole 111 on the arc-extinguishing plate 1 and the connecting hole formed by the base partition 3 and the terminal block 4, so that the arc-extinguishing plate 1, the base partition 3 and the terminal block 4 are connected to each other.

[0045] In this embodiment, refer to Figure 3 The circuit breaker also includes a moving contact 5, which rotates around its contact axis. A moving contact 5 limiting structure 6 is provided on the base to abut the moving contact 5 and keep it in the open position after the moving contact 5 is fully opened. There is an inclination angle between the connecting part 12 and the mounting part 11. When the moving contact 5 is in the open position after being rotated, the inclination angle makes the surfaces of the moving contact 5 on the surface of the connecting part 12 parallel to each other with a certain gap, so as to avoid the connecting part 12 of the arc-starting piece 1 from contacting the moving contact 5.

[0046] In this embodiment, refer to Figure 3 There is an angle between the connecting part 12 and the arc-starting part 13. The angle makes the protruding structure formed by the connecting part 12 and the arc-starting part 13 match the shape of the concave structure at the end of the moving contact 5 of the circuit breaker, so as to avoid the connecting part 12 and the arc-starting part 13 of the arc-starting piece 1 from contacting the moving contact 5.

[0047] In this embodiment, refer to Figure 3 After the moving contact 5 is opened and rotated, the arc jumps from the contact to the arc-initiating piece 1. At this time, the arc-initiating piece 1 and the terminal 4 are connected and conduction is achieved. The current flows directly from the arc-initiating piece 1 to the terminal 4, that is, the current path is as shown by the dotted arrow in the figure.

[0048] Example 4

[0049] This embodiment provides a circuit breaker with the same basic structure as Embodiment 3. The difference lies in that the mounting part 11 of the arc-starting plate 1 and the terminal 4 are respectively laid on both sides of the base partition 3, achieving a stacked arrangement of the three. Both the base partition 3 and the terminal 4 are provided with connection holes. A fastener 2 passes through the first mounting hole 111 on the arc-starting plate 1, the connection hole on the base partition 3, and the connection hole on the terminal 4, so that the three are interconnected.

[0050] Example 5

[0051] This embodiment provides a circuit breaker, whose basic structure is the same as that of Embodiment 3, as referred to below. Figure 4 The difference lies in the arc-starting plate assembly provided in embodiment 2. The mounting portion 11 of the arc-starting plate 1 also includes a second mounting hole 112. The base partition 3 and the terminal 4 are at the same height. The end of the base partition 3 and the end of the terminal 4 abut against each other. The mounting portion 11 of the arc-starting plate 1 is laid on the surface of the base partition 3 and the terminal 4. The base partition 3 and the terminal 4 are respectively provided with connection holes. One fastener 2 passes through the first mounting hole 111 on the arc-starting plate 1 and the connection hole on the base partition 3. Another fastener 2 passes through the second mounting hole 112 on the arc-starting plate 1 and the connection hole on the terminal 4, so that the arc-starting plate 1 is connected to the base partition 3 and the terminal 4 respectively.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0057] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An arc-starting plate assembly, characterized in that, include: Arc-starting plate and fasteners (2); The arc-starting plate includes a mounting part (11), an arc-starting part (13), and a connecting part (12). The connecting part (12) connects the mounting part (11) and the arc-drawing part (13). The mounting part (11) is provided with a first mounting hole (111), and the fastener (2) is disposed in the first mounting hole (111) for connecting the terminal (4) on the circuit breaker, so that an equipotential body is formed between the arc-starting plate and the terminal (4).

2. The arc-starting plate assembly according to claim 1, characterized in that, The mounting part (11) further includes a second mounting hole (112), and the fastener (2) is disposed in the second mounting hole (112) for connecting the base of the circuit breaker.

3. The arc-starting plate assembly according to claim 1, characterized in that, The connecting part (12) creates a certain gap between the mounting part (11) and the arc-drawing part (13), and the end of the fastener (2) is accommodated in the gap.

4. A circuit breaker, characterized in that, include: Base An arc-initiating plate assembly is disposed on the base; Terminal block (4) is provided on the base; The arc-starting plate assembly includes an arc-starting plate and a fastener (2); the arc-starting plate includes a mounting part (11), an arc-starting part (13), and a connecting part (12); the mounting part (11) is provided with a first mounting hole (111), and the fastener (2) is disposed in the first mounting hole (111) to connect the mounting part (11) and the terminal (4), so that an equipotential body is formed between the arc-starting plate and the terminal (4).

5. The circuit breaker according to claim 4, characterized in that, The mounting part (11) also includes a second mounting hole (112), and the fastener (2) is disposed in the second mounting hole (112) to connect the mounting part (11) and the base.

6. The circuit breaker according to claim 4, characterized in that, One of the fasteners (2) connects both the base and the terminal block (4).

7. The circuit breaker according to claim 6, characterized in that, The base includes a base partition (3), the base partition (3) and the terminal block (4) are at the same height, the end of the base partition (3) and the end of the terminal block (4) together form a connection hole, and the fastener (2) is disposed in the connection hole.

8. The circuit breaker according to claim 6, characterized in that, The base includes a base partition (3), the wiring terminal (4), the base partition (3) and the mounting part (11) are stacked, the base partition (3) and the wiring terminal (4) are provided with connection holes, and the fastener (2) is provided in the two connection holes.

9. The circuit breaker according to claim 4, characterized in that, There is an angle between the connecting part (12) and the mounting part (11), the angle of which makes the surface of the connecting part (12) parallel to the surface of the moving contact (5) after the circuit breaker moving contact (5) is opened and rotated, so as to avoid contact with the moving contact (5).

10. The circuit breaker according to claim 4, characterized in that, There is an inclination angle between the connecting part (12) and the arc-drawing part (13), and the structure of the inclination angle matches the end shape of the moving contact (5) of the circuit breaker.

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