A circuit breaker arc chamber

Abstract

The utility model relates to circuit breaker technical field, especially a circuit breaker arc extinguishing chamber, including gas production spare and lattice piece group, the first protruding is arranged on the gas production spare along the first direction and is provided with a plurality of mounting groove in the first direction, the lattice piece group includes a plurality of first lattice piece of U letter type structure, the first lattice piece includes first bottom, first side and second side, the first side and second side close to the side of first bottom are provided with second protruding and the second protruding is located in the side of first side and second side close to each other, each first lattice piece is installed in the mounting groove of the gas production spare on both sides through first side and second side.

Description

Technical Field

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

[0002] Circuit breakers are critical switching devices in power systems used to distribute electrical energy and protect lines and equipment. They are capable of making, carrying, and interrupting current under normal or fault conditions. Their core functions include: Overload protection: The mechanism is activated by the deformation of a bimetallic strip; the greater the current, the shorter the activation time.

[0003] Short circuit protection: A large current generates a magnetic field that overcomes the counterforce spring, triggering a trip instantaneously.

[0004] Undervoltage protection: When the voltage is lower than the set value, the armature is released and the circuit is cut off.

[0005] The arc-extinguishing chamber is the core component of a circuit breaker used to extinguish electric arcs, and its design directly affects the breaking capacity and lifespan of the circuit breaker. The metal-grid arc-extinguishing chamber divides the arc into multiple short arcs using metal grids, increasing the near-electrode voltage drop and thus the total arc voltage drop, thereby extinguishing the arc. The grids are made of 1-4mm thick iron or copper, insulated from each other and arranged in parallel or fan-shaped patterns. The arc-extinguishing effect can be enhanced using arc-blowing technology, but this requires an additional compressed air system, oil pump, or SF6 gas circulation device, increasing equipment size and cost. Utility Model Content

[0006] This utility model solves the problems in related technologies and proposes a circuit breaker arc-extinguishing chamber. By setting protrusions on the gas-generating components and grid plates, the protrusions form a contraction area, thereby increasing the speed at which the electric arc enters and enabling rapid arc extinguishing. The structure is simple.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a circuit breaker arc-extinguishing chamber, including a gas generating component and a grid plate assembly, wherein the gas generating component is provided with a first protrusion along a first direction and a plurality of mounting grooves are provided in the first direction, and the grid plate assembly includes a plurality of first grid plates with a U-shaped structure, wherein the first grid plate includes a first bottom edge, a first side edge and a second side edge, wherein a second protrusion is provided on the side of the first side edge and the second side edge near the first bottom edge, and the second protrusion is located on the side of the first side edge and the second side edge close to each other, and each first grid plate is installed in the mounting groove of the gas generating component on both sides through the first side edge and the second side edge.

[0008] As a preferred embodiment, an inclined U-shaped groove is provided on the side of the first bottom edge near the first side edge and the second side edge, and two adjacent first grid plates are installed alternately in the mounting groove.

[0009] As a preferred embodiment, a protrusion is provided on the side of the first side and the second side that are far apart from each other, and the protrusion is used to mount the first side plate and the second side plate.

[0010] As a preferred embodiment, the two gas generating components are detachably mounted on the first side plate and the second side plate respectively by bolts.

[0011] As a preferred embodiment, the grid plate group further includes several second grid plates with a U-shaped structure. The second grid plate includes a second bottom edge, a third side edge, and a fourth side edge. The side of the second bottom edge closest to the third and fourth side edges is a bevel. A protrusion is provided on the side of the third and fourth side edges that are far apart from each other, and the protrusion is used to install the second grid plate at the first end of the first side plate and the second side plate. Two adjacent second grid plates are arranged alternately.

[0012] As a preferred embodiment, it also includes an arc-inducing plate, which is installed at the second end of the first side plate and the second side plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by setting protrusions on the gas generating component and the grid plate, the protrusions form a contraction area, thereby increasing the speed at which the electric arc enters, thus enabling rapid arc extinguishing, and the structure is simple. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the gas-generating component of this utility model; Figure 3 This is a schematic diagram of the structure of the first grid plate of this utility model; Figure 4 This is a schematic diagram of the structure of the second grid plate of this utility model; Figure 5 This is a schematic diagram of the arc-inducing plate of this utility model.

[0015] In the picture: 1. Gas generating component; 11. First protrusion; 12. Mounting groove; 2. Grid plate assembly; 21. First bottom edge; 22. First side edge; 23. Second side edge; 24. Second protrusion; 25. Protrusion; 26. Second bottom edge; 27. Third side edge; 28. Fourth side edge; 3. First side plate; 4. Second side plate; 5. Arc-inducing plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0019] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0022] like Figures 1 to 5 As shown, a circuit breaker arc-extinguishing chamber includes a gas-generating component 1 and a grid assembly 2. The gas-generating component 1 has a first protrusion 11 along a first direction and several mounting grooves 12 along the first direction. The grid assembly 2 includes several first grids with a U-shaped structure. Each first grid includes a first bottom edge 21, a first side edge 22, and a second side edge 23. A second protrusion 24 is provided on the side of the first side edge 22 and the second side edge 23 that is close to the first bottom edge 21. The second protrusion 24 is located on the side where the first side edge 22 and the second side edge 23 are close to each other. Each first grid is installed in the mounting grooves 12 of the gas-generating component 1 on both sides through the first side edge 22 and the second side edge 23. The arrangement of the first protrusion 11 and the second protrusion 24 makes the protruding area form a contraction area, thereby increasing the speed at which the electric arc enters and thus enabling rapid arc extinguishing.

[0023] In one embodiment, the first bottom edge 21 has an inclined U-shaped groove on the side near the first side edge 22 and the second side edge 23. Two adjacent first grid plates are installed alternately in the mounting groove 12, such that the front of the first grid plate is facing up and the back of the adjacent second grid plate is facing up, and so on.

[0024] In one embodiment, a protrusion 25 is provided on the side of the first side 22 and the second side 23 of the first grid plate that are far apart from each other, and the first grid plate is mounted on the first side plate 3 and the second side plate 4 through the protrusions 25 on both sides.

[0025] In one embodiment, the two gas generating components 1 are detachably installed on the first side plate 3 and the second side plate 4 respectively by bolts, making assembly very convenient and quick.

[0026] In one embodiment, to facilitate the assembly of the stationary contact, the grid assembly 2 further includes several second grid plates with a U-shaped structure. The second grid plate includes a second bottom edge 26, a third side edge 27, and a fourth side edge 28. The side of the second bottom edge 26 closest to the third side edge 27 and the fourth side edge 28 is a bevel, and the lengths of the third side edge 27 and the fourth side edge 28 are shorter than the lengths of the first side edge 22 and the second side edge 23. The side of the third side edge 27 and the fourth side edge 28 that is far apart from each other is provided with a protrusion 25. The second grid plate is installed on the first end of the first side plate 3 and the second side plate 4 through the protrusions 25 on both sides. The two adjacent second grid plates are arranged alternately, such that the first second grid plate faces upward and the adjacent second second grid plate faces upward, and so on.

[0027] In one embodiment, an arc-inducing piece 5 is also included. The arc-inducing piece 5 has a groove-shaped structure and two grooves on its bottom edge. The arc-inducing piece 5 is installed on the second end of the first side plate 3 and the second side plate 4 through the protrusions 25 at both ends.

[0028] The above are preferred embodiments of this utility model. Those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above. Any obvious improvements, substitutions or modifications made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.

Claims

1. A circuit breaker arc chute, characterized by: The device includes a gas generating component (1) and a grid plate assembly (2). The gas generating component (1) has a first protrusion (11) along a first direction and a plurality of mounting grooves (12) along the first direction. The grid plate assembly (2) includes a plurality of first grid plates with a U-shaped structure. The first grid plate includes a first bottom edge (21), a first side edge (22), and a second side edge (23). A second protrusion (24) is provided on the side of the first side edge (22) and the second side edge (23) close to the first bottom edge (21). The second protrusion (24) is located on the side of the first side edge (22) and the second side edge (23) that are close to each other. Each first grid plate is installed in the mounting grooves (12) of the gas generating component (1) on both sides through the first side edge (22) and the second side edge (23).

2. The circuit breaker arc chute of claim 1, wherein: The first bottom edge (21) has an inclined U-shaped groove on the side near the first side edge (22) and the second side edge (23), and the two adjacent first grid plates are installed alternately in the mounting groove (12).

3. The circuit breaker arc chute of claim 1, wherein: A protrusion (25) is provided on the side of the first side (22) and the second side (23) that are far apart from each other, and is installed on the first side plate (3) and the second side plate (4) through the protrusion (25).

4. The circuit breaker arc chute of claim 3, wherein: The two gas generating components (1) are detachably mounted on the first side plate (3) and the second side plate (4) respectively by bolts.

5. The circuit breaker arc chute of claim 1, wherein: The grid plate group (2) also includes several second grid plates with a U-shaped structure. The second grid plate includes a second bottom edge (26), a third side edge (27) and a fourth side edge (28). The side of the second bottom edge (26) close to the third side edge (27) and the fourth side edge (28) is a slanted edge. A protrusion (25) is provided on the side of the third side edge (27) and the fourth side edge (28) that are far away from each other. The protrusion (25) is installed on the first end of the first side plate (3) and the second side plate (4). The two adjacent second grid plates are arranged alternately.

6. The circuit breaker arc chute of claim 1, wherein: It also includes an arc-inducing piece (5), which is installed at the second end of the first side plate (3) and the second side plate (4).

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