An arc-extinguishing chamber and circuit breaker

Abstract

The utility model provides a kind of arc extinguishing chamber and circuit breaker, it is related to electrical equipment technical field.Arc extinguishing chamber includes first grid piece group and second grid piece group, the length of multiple grid pieces in first grid piece group is less than the length of multiple grid pieces of second grid piece group, two ends of first grid piece group and second grid piece group are respectively provided with arc entry end and arc exit end, the arc exit end of first grid piece group and the arc exit end of second grid piece group are ladder-shaped, so that arc extinguishing chamber can adapt to the limited internal space of irregular shell, so as to improve the adaptability of arc extinguishing chamber, so as to improve the utilization rate of circuit breaker internal space, enhance the flexibility and integration of product structure design.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to an arc-extinguishing chamber and a circuit breaker. Background Technology

[0002] In power systems, circuit breakers are key devices for automatic circuit control and protection, and their performance directly affects the stability and safety of the electrical system. The arc-extinguishing chamber, as one of the core components of a circuit breaker, is mainly used to quickly extinguish the electric arc generated during circuit breaking, preventing damage to equipment and ensuring operational safety.

[0003] However, in actual structural design, the internal space of the circuit breaker housing is often limited by factors such as overall size and functional layout, and is not completely regular. This makes it difficult for the arc-extinguishing chamber of the traditional structure to make full use of the irregular effective space inside the housing, affecting the rationality of the arrangement of other components inside the circuit breaker and the overall miniaturization design. Utility Model Content

[0004] The purpose of this utility model is to provide an arc-extinguishing chamber and a circuit breaker that can adapt to the limited internal space of an irregular shell, thereby improving the adaptability of the arc-extinguishing chamber, increasing the utilization rate of the internal space of the circuit breaker, and enhancing the flexibility and integration of the product structure design.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In a first aspect, the present invention provides an arc-extinguishing chamber, comprising a first grid plate group and a second grid plate group;

[0007] The length of multiple grids in the first grid group is less than the length of multiple grids in the second grid group. The first grid group and the second grid group have an arc-entry end and an arc-exit end at their respective ends. The arc-exit end of the first grid group and the arc-exit end of the second grid group are stepped.

[0008] In an optional implementation, the multiple grids in the first grid group have the same length, and / or the multiple grids in the second grid group have the same length.

[0009] In an optional implementation, the first grid group and the second grid group are arranged asymmetrically.

[0010] In an optional implementation, the arc-entry end of the first grid group is flush with the arc-entry end of the second grid group.

[0011] In an optional embodiment, the arc-extinguishing chamber further includes an arc-initiating plate, which is disposed on one side of the contact opening between the moving contact and the stationary contact, and is set at an angle to the contact opening direction of the moving contact and the stationary contact, for bouncing the electric arc and airflow toward one side of the arc-inlet end.

[0012] In an optional embodiment, the arc-extinguishing chamber is disposed in the housing, and the side of the arc-initiating plate away from the first grid plate group and the second grid plate group forms a cavity with the housing.

[0013] In an optional embodiment, the plurality of grids in the first grid group and the plurality of grids in the second grid group are arranged in parallel.

[0014] In an optional embodiment, the arc-extinguishing chamber further includes a plurality of arc-splitting baffles, at least one of the arc-splitting baffles being disposed at the arc-exiting end of the first grid plate group, and / or at least one of the arc-splitting baffles being disposed at the arc-exiting end of the second grid plate group.

[0015] In an optional embodiment, the arc-extinguishing chamber further includes at least one arc-initiating baffle, at least one of the arc-initiating baffles being connected at an angle to the arc-splitting partition, and the arc-initiating baffles being disposed at the exhaust port of the housing.

[0016] Secondly, this utility model provides a circuit breaker, including a housing and a moving contact, a stationary contact, and an arc-extinguishing chamber as described in any of the foregoing embodiments, all disposed within the housing.

[0017] The beneficial effects of the arc-extinguishing chamber and circuit breaker provided by this utility model embodiment include: the length of multiple grid plates in the first grid plate group is smaller than the length of multiple grid plates in the second grid plate group, and the arc-exiting ends of the first grid plate group and the second grid plate group are arranged in a stepped manner, so that the arc-extinguishing chamber can adapt to the limited internal space of the irregular shell, thereby improving the adaptability of the arc-extinguishing chamber, thereby improving the utilization rate of the internal space of the circuit breaker, and enhancing the flexibility and integration of the product structure design. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the circuit breaker structure provided in an embodiment of the present utility model;

[0020] Figure 2 This is a partial structural diagram of a circuit breaker provided in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the arc-extinguishing chamber structure provided in an embodiment of the present invention.

[0022] Icons: 10-Circuit breaker; 100-Arc extinguishing chamber; 110-First grid group; 120-Second grid group; 130-Arc inlet end; 140-Arc outlet end; 150-Arc ignition plate; 151-First section; 152-Second section; 160-Cavity; 170-Arc splitting partition; 180-Arc ignition baffle; 200-Housing; 210-Exhaust port; 300-Moving contact; 400-Stationary contact; 410-Bending section; 500-Contact opening. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In power systems, circuit breakers are key devices for automatic circuit control and protection, and their performance directly affects the stability and safety of the electrical system. The arc-extinguishing chamber, as one of the core components of a circuit breaker, is mainly used to quickly extinguish the electric arc generated during circuit breaking, preventing damage to equipment and ensuring operational safety.

[0030] However, in actual structural design, the internal space of the circuit breaker housing is often limited by factors such as overall size and functional layout, and is not completely regular. This makes it difficult for the arc-extinguishing chamber of the traditional structure to make full use of the irregular effective space inside the housing, affecting the rationality of the arrangement of other components inside the circuit breaker and the overall miniaturization design.

[0031] Therefore, there is an urgent need to provide an arc-extinguishing chamber 100 structure that can adapt to the irregular space inside the housing 200, so as to improve the utilization rate of the internal space of the circuit breaker 10, enhance the flexibility and integration of the product structure design, and at the same time ensure good arc extinguishing effect and operational reliability, so as to meet the development needs of modern power equipment for high performance and high integration.

[0032] Please see Figures 1 to 3 This utility model provides a circuit breaker 10, including a housing 200 and a moving contact 300, a stationary contact 400 and an arc-extinguishing chamber 100 disposed within the housing 200.

[0033] In this embodiment, when the moving contact 300 and the stationary contact 400 are in the open state, a contact opening 500 is formed between the moving contact 300 and the stationary contact 400. The electric arc generated during the disconnection process of the moving contact 300 and the stationary contact 400 moves along the contact opening 500 toward the arc-extinguishing chamber 100, so as to extinguish the arc through the arc-extinguishing chamber 100, thereby ensuring the safety and operational stability of the circuit breaker 10.

[0034] In detail, the arc-extinguishing chamber 100 includes a first grid plate group 110 and a second grid plate group 120 arranged adjacent to each other.

[0035] In this arrangement, the length of multiple grids in the first grid group 110 is less than the length of multiple grids in the second grid group 120. The first grid group 110 and the second grid group 120 have an arc-entry end 130 and an arc-exit end 140 at their respective ends. The arc-exit end 140 of the first grid group 110 and the arc-exit end 140 of the second grid group 120 are stepped.

[0036] It is understood that the first grid plate group 110 and the second grid plate group 120 are both composed of multiple grid plates arranged at intervals, and two adjacent grid plates form an arc extinguishing channel. The high temperature and high pressure gas generated during the arc extinguishing process enters the arc extinguishing channel at one end, which is the inlet, and flows out of the arc extinguishing channel at the other end, which is the outlet. Multiple inlets together constitute the arc entry end 130, and multiple outlets together constitute the arc exit end 140.

[0037] Therefore, the electric arc and high-temperature, high-pressure gas generated during the breaking process between the moving contact 300 and the stationary contact 400 can flow sequentially through the arc entry end 130, the first grid plate group 110, and the second grid plate group 120, thereby achieving a good arc extinguishing effect.

[0038] The lengths of multiple grid plates in the first grid plate group 110 are shorter than the lengths of multiple grid plates in the second grid plate group 120, and the arc-exiting ends 140 of the first grid plate group 110 and the arc-exiting ends 140 of the second grid plate group 120 are arranged in a stepped manner, so that the arc-extinguishing chamber 100 can adapt to the limited internal space of the irregular shell 200, thereby improving the adaptability of the arc-extinguishing chamber 100, thereby improving the internal space utilization of the circuit breaker 10, and enhancing the flexibility and integration of the product structure design.

[0039] Furthermore, the multiple grids in the first grid group 110 are of the same length, which allows for the use of a unified mold and processing technology, thereby reducing manufacturing costs. In addition, the fact that multiple grids are of the same length also facilitates assembly, thereby improving production efficiency.

[0040] Similarly, the multiple grids in the second grid group 120 have the same length, which will not be elaborated here.

[0041] It is understood that multiple grids in the first grid group 110 can be set to have the same length, or multiple grids in the second grid group 120 can be set to have the same length, or multiple grids in the first grid group 110 and multiple grids in the second grid group 120 can be set to have the same length at the same time. The length can be adjusted according to the actual product requirements, and no specific limitation is made here.

[0042] Furthermore, the multiple grid plates in the first grid plate group 110 have the same structure, and the multiple grid plates in the second grid plate group 120 have the same structure. Therefore, the first grid plate group 110 can be formed by arranging multiple grid plates with the same structure in an orderly manner, and the second grid plate group 120 can be formed by arranging multiple grid plates with the same structure in an orderly manner, which facilitates the assembly of the arc extinguishing chamber 100.

[0043] It is worth mentioning that because the lengths of the first grid plate group 110 and the second grid plate group 120 are not the same, the arc-extinguishing chamber 100 is asymmetrically arranged. Therefore, during the installation of the arc-extinguishing chamber 100, its asymmetrical design can play a role in preventing mistakes and thus avoid the occurrence of incorrect installation of the arc-extinguishing chamber 100.

[0044] In addition, it should be noted that the arc-entry end 130 of the first grid group 110 is flush with the arc-entry end 130 of the second grid group 120.

[0045] In other words, one end of the arc-extinguishing chamber 100 is a flat arc-entry end 130, and the other end is a stepped arc-exit end 140, so that the arc-extinguishing chamber 100 can better adapt to the irregular shell 200 and make full use of its limited internal space.

[0046] Furthermore, the arc-extinguishing chamber 100 also includes an arc-starting plate 150, which is disposed on one side of the contact opening 500 between the moving contact 300 and the stationary contact 400, and is aligned with the direction of the contact opening 500 of the moving contact 300 and the stationary contact 400 (e.g., ...). Figure 2 As shown in Figure A, the arc and airflow are set at an angle, thereby reflecting the arc and airflow toward one side of the arc inlet 130.

[0047] It is worth noting that the direction of the contact opening 500 is the direction of the electric arc and airflow generated during the separation of the moving contact 300 and the stationary contact 400. In this embodiment, a bending portion 410 is provided on the stationary contact 400 to guide the electric arc to move along its extension direction. Therefore, the direction of the contact opening 500 is the extension direction of the bending portion 410. The arc-inducing plate 150 and the direction of the contact opening 500 form a non-perpendicular angle, that is, the directions of the arc-inducing plate 150 and the contact opening 500 are not perpendicular or parallel.

[0048] In this embodiment, the moving contact 300 is located between the arc-initiating plate 150 and the stationary contact 400, and the arc-initiating plate 150 is located in front of the contact opening 500. Therefore, when the arc moves along the contact opening 500, it will come into contact with the arc-initiating plate 150, and the arc and airflow will be bounced towards the side of the arc entry end 130 through the arc-initiating plate 150, which is conducive to the arc entering the arc extinguishing chamber 100 in time.

[0049] Furthermore, the side of the arc-starting plate 150 away from the first grid group 110 and the second grid group 120 forms a cavity 160 with the housing 200. Therefore, during the process of the electric arc and airflow moving towards the arc-starting plate 150, part of the airflow first enters the cavity 160 and thereby effectively reduces the air pressure of the electric arc moving towards the arc-starting plate 150, thus facilitating the faster movement of the electric arc, thereby increasing the speed at which the electric arc enters the first grid group 110 and the second grid group 120, and thus improving the arc extinguishing efficiency.

[0050] Specifically, the arc-inducing plate 150 includes a first section 151 and a second section 152 connected to each other. The first section 151 is disposed on one side of the opening of the moving contact 300 and the stationary contact 400, and is used to form a cavity 160 with the housing 200. The second section 152 is disposed on one side of the second grid plate group 120 and is parallel to the grid plates of the second grid plate group 120.

[0051] Furthermore, the multiple grids in the first grid group 110 and the multiple grids in the second grid group 120 are arranged in parallel. In other words, the multiple grids in the first grid group 110 and the second grid group 120 extend in the same direction, which is beneficial for automated mass production.

[0052] Furthermore, the arc-extinguishing chamber 100 also includes a plurality of arc-splitting baffles 170, at least one arc-splitting baffle 170 being disposed at the arc-exiting end 140 of the first grid plate group 110, and at least one arc-splitting baffle 170 being disposed at the arc-exiting end 140 of the second grid plate group 120.

[0053] By providing an arc-splitting baffle 170 in at least one of the first grid plate group 110 and the second grid plate group 120, the gas flowing out of the first grid plate group 110 or the second grid plate group 120 is separated into multiple airflows through the arc-splitting baffle 170, thereby balancing the gas pressure in different parts of the arc-extinguishing chamber 100, so that the electric arc can quickly enter the arc-extinguishing chamber 100, thereby achieving the effect of rapid arc extinguishing.

[0054] Specifically, in this embodiment, there are two arc-splitting partitions 170, and the two arc-splitting partitions 170 are respectively connected to the grids in the first grid group 110 and the second grid group 120.

[0055] Furthermore, the arc-extinguishing chamber 100 also includes at least one arc-initiating baffle 180, which is connected at an angle to the arc-splitting partition 170. The housing 200 is provided with an exhaust port 210, and the arc-initiating baffle 180 is used to be disposed at the exhaust port 210.

[0056] In this embodiment, there are two arc-initiating baffles 180, both of which are connected at an angle to the arc-splitting partitions 170. The arc-exiting end 140 of the second grid plate group 120 is correspondingly arranged with the exhaust port 210. Therefore, the arc-initiating baffles 180 are connected to the arc-splitting partitions 170 arranged in the second grid plate group 120. By connecting the arc-initiating baffles 180 and the arc-splitting partitions 170 at an angle, the airflow can be bounced to both sides after passing through the arc-initiating baffles 180. On the other hand, the airflow direction is not directly aligned with the exhaust port 210, thereby preventing metal particles in the airflow from being discharged from the exhaust port 210 to the outside of the housing 200, thus avoiding damage to other electrical components.

[0057] It is worth mentioning that the arc-splitting baffle 170 and the arc-initiating baffle 180 can be separate components or protruding ribs that are integrally formed on the housing 200 and the housing 200. No specific limitation is made here.

[0058] In summary, this utility model provides an arc-extinguishing chamber 100 and a circuit breaker 10. The lengths of multiple plates in the first plate group 110 are shorter than the lengths of multiple plates in the second plate group 120, and the arc-exiting ends 140 of the first plate group 110 and the second plate group 120 are arranged in a stepped manner. This allows the arc-extinguishing chamber 100 to adapt to the limited internal space of the irregular shell 200, thereby improving the adaptability of the arc-extinguishing chamber 100, increasing the internal space utilization of the circuit breaker 10, and enhancing the flexibility and integration of the product structure design.

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An arc-extinguishing chamber, characterized in that, It includes a first grid group (110) and a second grid group (120); The length of multiple grids in the first grid group (110) is less than the length of multiple grids in the second grid group (120). The first grid group (110) and the second grid group (120) have an arc-entry end (130) and an arc-exit end (140) at their respective ends. The arc-exit end (140) of the first grid group (110) and the arc-exit end (140) of the second grid group (120) are stepped.

2. The arc-extinguishing chamber according to claim 1, characterized in that, The multiple grids in the first grid group (110) have the same length, and / or the multiple grids in the second grid group (120) have the same length.

3. The arc-extinguishing chamber according to claim 1, characterized in that, The first grid group (110) and the second grid group (120) are arranged asymmetrically.

4. The arc-extinguishing chamber according to claim 1, characterized in that, The arc-entry end (130) of the first grid plate group (110) is flush with the arc-entry end (130) of the second grid plate group (120).

5. The arc-extinguishing chamber according to claim 1, characterized in that, The arc-extinguishing chamber also includes an arc-initiating plate (150), which is disposed on one side of the contact opening (500) between the moving contact (300) and the stationary contact (400), and is set at an angle to the direction of the contact opening (500) of the moving contact (300) and the stationary contact (400), for bouncing the electric arc and airflow toward the side of the arc-inlet end (130).

6. The arc-extinguishing chamber according to claim 5, characterized in that, The arc-extinguishing chamber is disposed in the housing (200), and the side of the arc-initiating plate (150) away from the first grid plate group (110) and the second grid plate group (120) forms a cavity (160) with the housing (200).

7. The arc-extinguishing chamber according to claim 1, characterized in that, The multiple grids in the first grid group (110) and the multiple grids in the second grid group (120) are arranged in parallel.

8. The arc-extinguishing chamber according to claim 1, characterized in that, The arc-extinguishing chamber further includes multiple arc-splitting partitions (170), at least one of the arc-splitting partitions (170) is disposed at the arc-exiting end (140) of the first grid plate group (110), and / or at least one of the arc-splitting partitions (170) is disposed at the arc-exiting end (140) of the second grid plate group (120).

9. The arc-extinguishing chamber according to claim 8, characterized in that, The arc-extinguishing chamber further includes at least one arc-initiating baffle (180), at least one of the arc-initiating baffles (180) being connected at an angle to the arc-splitting partition (170), and the arc-initiating baffle (180) being disposed at the exhaust port (210) of the housing (200).

10. A circuit breaker, characterized in that, It includes a housing (200) and a moving contact (300), a stationary contact (400) disposed within the housing (200), and an arc-extinguishing chamber as described in any one of claims 1-9.

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