An arc quenching assembly and switch

Abstract

The utility model provides a kind of arc extinguishing assembly and switch, it is related to electrical equipment technical field.Arc extinguishing assembly includes shell, grid piece group and flameout piece.Shell is provided with mounting cavity, in at least one of side plate, pedestal and bottom plate setting gas passage;Grid piece group is set in mounting cavity inside, to realize the segmentation and cooling of arc by multiple interval grid piece, to accelerate arc extinguishing process.In this process, gas flows along the arrangement direction of grid piece group, and finally reaches its gas outlet, so that gas flow path is clear and smooth, reduces gas stagnation or local pressure concentration problem, to improve the overall working stability of arc extinguishing assembly.By setting flameout piece in first gas passage, for preventing arc or charged particle from escaping through gas passage, only allowing cooled gas to discharge, not only ensure the effectiveness of gas passage in function, but also further improve the safety of arc extinguishing assembly.

Description

Technical Field

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

[0002] As power systems evolve towards higher voltage levels and the requirements for short-circuit fault handling capabilities increase, the breaking capacity of electrical equipment such as circuit breakers needs to be correspondingly enhanced. During high-energy arc breaking, a large amount of high-temperature, high-pressure gas is generated within the arc-extinguishing chamber; its rapid and smooth discharge is crucial to ensuring the safe and reliable breaking of the circuit breaker. Therefore, AC products place higher demands on the smoothness of gas discharge after arc extinguishing.

[0003] However, existing AC circuit breakers often have poorly designed exhaust channels or excessive exhaust resistance, preventing the timely release of high-pressure gas generated during arc extinguishing. This leads to a rapid increase in internal pressure, potentially causing the upper casing to be overturned by the internal pressure, compromising the overall airtightness of the equipment. In severe cases, it can even rupture the top or front cover of the arc-extinguishing chamber, resulting in structural damage, arc leakage, and serious safety accidents such as equipment burnout or explosion. Such faults not only affect the performance of the circuit breaker itself but may also endanger the safety of operators and the normal operation of surrounding equipment. Utility Model Content

[0004] The purpose of this invention is to provide an arc-extinguishing component and switch that can effectively cool and divide the electric arc in the arc-extinguishing chamber and only exhaust the generated gas. This not only effectively solves the problem of poor exhaust, but also prevents the escape of arc ions, significantly improves the breaking capacity of the switch, and enhances its operational stability and safety.

[0005] The embodiments of this utility model are implemented as follows: In a first aspect, this utility model provides an arc-extinguishing component, comprising: A housing, the housing comprising two opposing side plates forming a mounting cavity; A grid assembly, wherein the grid assembly is disposed in the mounting cavity; Flame extinguishing disc; It also includes a base plate and a base, the base plate, the base, and the housing together forming the mounting cavity; Wherein, at least one of the side plates is provided with a first air outlet channel communicating with the mounting cavity, the first air outlet channel being located at the air outlet end of the grid plate group, and the flame extinguishing plate being disposed in the first air outlet channel; and / or, the base is provided with a second air outlet channel communicating with the mounting cavity; and / or, the bottom plate is provided with a third air outlet channel communicating with the mounting cavity.

[0006] In an optional embodiment, the flame extinguishing plate is further disposed in the second air outlet channel and / or the third air outlet channel.

[0007] In an optional embodiment, the number of flame extinguishing plates is multiple, and the multiple flame extinguishing plates are arranged overlappingly.

[0008] In an optional embodiment, each of the two side panels is provided with at least one first air outlet channel, and the first air outlet channels on the two side panels are arranged opposite to each other.

[0009] In an optional embodiment, the extending directions of the two opposing first air outlet channels are perpendicular to the extending directions of the second air outlet channel and the third air outlet channel.

[0010] In an optional embodiment, the second air outlet channel and the third air outlet channel are arranged opposite to each other.

[0011] In an optional embodiment, the projection of the grid assembly onto the side plate surface may partially overlap, completely overlap, or not overlap with the first air outlet channel.

[0012] In an optional embodiment, the first venting channel is exposed outside the base and / or the bottom plate to communicate with the external space.

[0013] In an optional embodiment, at least two first air outlet channels are provided on the same side plate, and the at least two first air outlet channels are located on both sides of the grid plate group, and the at least two first air outlet channels are centrally symmetrical.

[0014] Secondly, this utility model provides a switch, including an arc-extinguishing component as described in any of the foregoing embodiments.

[0015] The beneficial effects of the arc-extinguishing assembly and switch provided in this embodiment include: the grid plate group is disposed inside the mounting cavity to divide and cool the electric arc through multiple spaced grid plates, thereby accelerating the arc extinguishing process. The gas generated during this process flows along the arrangement direction of the grid plate group and eventually reaches its outlet end. Furthermore, by providing an outlet channel for the discharged gas in at least one of the side plate, base, and bottom plate, the gas flow path is clear and smooth, reducing gas stagnation or local pressure concentration problems, thus improving the overall operational stability of the arc-extinguishing assembly. By placing the flame extinguishing plate in the first outlet channel, it prevents the electric arc or charged particles from escaping through the outlet channel, allowing only cooled gas to be discharged. This not only ensures the functional effectiveness of the outlet channel but also further enhances the safety of the arc-extinguishing assembly, preventing secondary discharge or equipment damage caused by arc leakage. Therefore, the breaking capacity of the switch is significantly improved, and its operational stability and safety are enhanced. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a cross-sectional view of the arc-extinguishing component provided in an embodiment of the present utility model; Figure 2 This is one of the schematic diagrams of the arc extinguishing component provided in the embodiment of this utility model; Figure 3 This is a first-view structural schematic diagram of the arc extinguishing component provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the arc extinguishing component from a second perspective, provided in an embodiment of the present invention. Figure 5 This is the second schematic diagram of the arc-extinguishing component structure provided in the embodiment of the present utility model; Figure 6 One of the partial structural cross-sectional views of the arc extinguishing component provided in the embodiment of this utility model; Figure 7 This is a second cross-sectional view of the arc extinguishing component provided in an embodiment of the present utility model.

[0018] Icons: 10-Arc extinguishing assembly; 100-Housing shell; 110-Mounting cavity; 120-First air outlet channel; 130-Side plate; 200-Grid plate assembly; 300-Flame extinguishing plate; 400-Base; 410-Second air outlet channel; 500-Bottom plate; 510-Third air outlet channel. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] 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.

[0025] As power systems evolve towards higher voltage levels and the requirements for short-circuit fault handling capabilities increase, the breaking capacity of electrical equipment such as circuit breakers needs to be correspondingly enhanced. During high-energy arc breaking, a large amount of high-temperature, high-pressure gas is generated in the arc-extinguishing chamber. Rapid and smooth discharge of this gas is crucial to ensuring the safe and reliable breaking of the circuit breaker. Therefore, AC products place higher demands on the smoothness of gas discharge after arc extinguishing.

[0026] However, existing AC circuit breakers often have poorly designed exhaust channels or excessive exhaust resistance, preventing the timely release of high-pressure gas generated during arc extinguishing. This leads to a rapid increase in internal pressure, potentially causing the upper casing to be overturned by the internal pressure, compromising the overall airtightness of the equipment. In severe cases, it can even rupture the top or front cover of the arc-extinguishing chamber, resulting in structural damage, arc leakage, and serious safety accidents such as equipment burnout or explosion. Such faults not only affect the performance of the circuit breaker itself but may also endanger the safety of operators and the normal operation of surrounding equipment.

[0027] Therefore, it is urgent to optimize the exhaust structure design of AC circuit breakers, improve the smoothness of exhaust, effectively release the high-pressure gas during the arc extinguishing process, avoid the problem of the casing overturning or breaking due to poor exhaust, improve the safety and reliability of the equipment under high breaking conditions, and meet the needs of modern power systems for high-performance switchgear.

[0028] Please see Figures 1 to 7 This utility model provides an arc extinguishing component 10, which is particularly suitable for switchgear such as circuit breakers. By rationally designing the exhaust structure, the smoothness of gas flow during the arc extinguishing process is improved, thereby effectively improving the breaking capacity of the switch and thus improving the operational stability and safety of the arc extinguishing component 10.

[0029] In detail, the arc extinguishing assembly 10 includes a housing 100, a grid assembly 200, and a flame extinguishing plate 300.

[0030] The housing 100 is provided with a mounting cavity 110 and a first air outlet channel 120, which is connected to the mounting cavity 110; the grid plate group 200 is disposed in the mounting cavity 110, and the first air outlet channel 120 is located at the air outlet end of the grid plate group 200; the flame extinguishing plate 300 is disposed in the first air outlet channel 120.

[0031] It is understandable that when an electric arc and high-temperature, high-pressure gas are generated, the end where the electric arc and high-temperature, high-pressure gas enter the grid assembly 200 is the inlet end, the electric arc is quickly extinguished in the grid assembly 200, and the end where the gas flows out from the other end of the grid assembly 200 is the outlet end.

[0032] In this embodiment, the housing 100 serves as a basic structural component, and an installation cavity 110 is provided inside to accommodate the grid assembly 200. The airflow between the housing 100 and the installation cavity 110 is achieved through the first air outlet channel 120. This allows the high-temperature and high-pressure gas to be smoothly discharged through the first air outlet channel 120 after the electric arc is introduced into the arc extinguishing component 10, thus avoiding abnormal increase in internal pressure and preventing deformation or damage to the housing 100.

[0033] It should be noted that the projection of the grid assembly 200 on the side plate 130 may partially overlap, completely overlap, or not overlap with the first air outlet channel 120. In other words, the positions of the grid assembly 200 and the first air outlet channel 120 are unrelated.

[0034] Specifically, the grid assembly 200 is disposed inside the mounting cavity 110 to divide and cool the electric arc through multiple spaced grids, thereby accelerating the arc extinguishing process. The gas generated during this process flows along the grid assembly 200 and eventually reaches its outlet end, i.e., the location of the first outlet channel 120. This ensures a clear and smooth gas flow path, reducing gas stagnation or localized pressure concentration, thus improving the overall operational stability of the arc extinguishing assembly 10.

[0035] By placing the flame extinguishing plate 300 in the first gas outlet channel 120, it prevents electric arcs or charged particles from escaping through the gas outlet channel, allowing only cooled gas to be discharged. In this way, not only is the functional effectiveness of the gas outlet channel ensured, but the safety of the arc extinguishing assembly 10 is further improved, preventing secondary discharge or equipment damage caused by arc leakage.

[0036] In summary, the arc extinguishing assembly 10 provided in this embodiment, through the synergistic action of the first air outlet channel 120 of the housing 100, the grid plate group 200, and the flame extinguishing plate 300, effectively cools and divides the electric arc in the arc extinguishing chamber, and only discharges the generated gas. This not only effectively solves the problem of poor exhaust, but also prevents the escape of arc ions by the flame extinguishing plate 300 set in the first air outlet channel 120, significantly improving the switching capability and enhancing its operational stability and safety.

[0037] It is worth mentioning that the first venting channel 120 is at least partially exposed outside the base 400 and / or the bottom plate 500 to communicate with the external space, thereby ensuring that the gas can be directly discharged to the outside of the switch.

[0038] Furthermore, the arc extinguishing assembly 10 also includes a base 400, a housing 100 disposed on the base 400, the base 400 being located at one end of the housing 100 and together with the housing 100 forming an installation cavity 110, and the base 400 being provided with a second air outlet channel 410.

[0039] The second venting channel 410 is disposed on the base 400 and communicates with the mounting cavity 110, so that while the gas is discharged through the first venting channel 120 on the housing 100, it can also be discharged through the second venting channel 410 of the base 400. This not only effectively disperses the gas flow pressure and reduces the risk of structural damage caused by local pressure concentration, but also enhances the rationality of the spatial layout of the venting channel, enabling the gas to be discharged through multiple paths during the arc extinguishing process, further improving the working reliability of the arc extinguishing component 10.

[0040] Furthermore, the arc extinguishing assembly 10 also includes a base plate 500, which is disposed on the housing 100 and connected to the base 400. The base plate 500, the base 400, and the housing 100 together form an installation cavity 110. The base plate 500 is provided with a third air outlet channel 510.

[0041] Specifically, the base plate 500 is disposed on the housing 100 and connected to the base 400, forming a fixed fit with the housing 100, and is stably connected to the base 400 by fasteners or snap-fits. The base plate 500, base 400, and housing 100 together form a mounting cavity 110 in the assembled state. This mounting cavity 110 is used to accommodate the grid assembly 200 and to receive the high-temperature gas generated during the electric arc combustion process.

[0042] Based on this, a third venting channel 510 is disposed on the base plate 500 and communicates with the mounting cavity 110, thereby further increasing the gas discharge path in addition to the first venting channel 120 of the housing 100 and the second venting channel 410 of the base 400. This allows the gas to be discharged from multiple directions during the arc extinguishing process, including both sides of the housing 100, the base 400, and the base plate 500, further reducing local pressure concentration and improving the spatial uniformity of the venting channels, thereby enhancing the stability and reliability of the arc extinguishing assembly 10 during high-current interruption.

[0043] It is worth mentioning that the flame extinguishing plate 300 is also provided in at least one of the second venting channel 410 and the third venting channel 510.

[0044] The second and third exhaust channels 410 and 510, as part of the gas emission path, play a crucial role in guiding the flow of high-temperature ionized gas during arc generation. By placing the flame extinguishing plate 300 in at least the second and third exhaust channels 410 and 510, the ionized gas passing through these channels can be effectively cooled and blocked, thereby accelerating the dissipation of arc energy. Therefore, not only is the flow path of the arc gas extended, but the physical isolation provided by the flame extinguishing plate 300 also suppresses the possibility of arc reignition, improving the overall safety and stability of the arc extinguishing assembly 10.

[0045] It should be noted that there are multiple flame extinguishing plates 300 installed in the same gas outlet channel. The multiple flame extinguishing plates 300 are stacked to form a multi-level barrier structure. This structure can cool, divide and guide the arc gas layer by layer when it passes through, thereby effectively reducing the arc temperature and suppressing its reignition tendency, and further preventing the escape of arc ions.

[0046] Furthermore, the housing 100 includes two side plates 130 disposed opposite to each other, a base 400 and a bottom plate 500 respectively disposed at both ends of the two side plates 130, and a first air outlet channel 120 disposed on at least one side plate 130.

[0047] In this embodiment, the first venting channel 120 is disposed on at least one side plate 130, so that the high-temperature ionized gas generated during the arc breaking process can be discharged in an orderly manner along the venting channel on the side plate 130, thereby improving the energy dissipation efficiency of the arc, thus avoiding the retention and backflow of arc gas inside the shell 100, reducing the risk of reignition, and effectively controlling the stability of the arc movement.

[0048] It should be noted that at least one of the side plate, base, and bottom plate is provided with an air outlet channel, that is, at least one of the following three is provided: the side plate is provided with a first air outlet channel, the base is provided with a second air outlet channel, and the bottom plate is provided with a third air outlet channel, so that gas can be effectively discharged through any one of the air outlet channels.

[0049] In practical applications, exhaust channels are usually provided in the side plates, base, and bottom plate to increase the gas exhaust path and ensure that the gas can be discharged quickly.

[0050] In detail, in this embodiment, each of the two side plates 130 is provided with at least one first air outlet channel 120, and the first air outlet channels 120 on the two side plates 130 are arranged opposite to each other.

[0051] Since the first air outlet channels 120 on the two side plates 130 are arranged opposite to each other, the arc gas can diffuse more evenly to both channels, avoiding the problem of local overheating or reduced arc extinguishing efficiency caused by the gas flow being biased to one side. This enhances the ability of arc energy to dissipate in multiple directions, thereby effectively shortening the arc extinguishing time and improving the overall arc extinguishing stability.

[0052] It should also be noted that the extension directions of the two first air outlet channels 120 are perpendicular to the extension directions of the second air outlet channel 410 and the third air outlet channel 510.

[0053] In other words, the extension directions of the two first gas outlet channels 120 are perpendicular to the extension directions of the second gas outlet channel 410 and the third gas outlet channel 510, which further optimizes the arc gas flow path and enables the gas to be discharged quickly in multiple directions, thereby significantly improving the applicability and safety of the arc extinguishing component 10 under high-energy breaking conditions.

[0054] In addition, at least two first air outlet channels 120 are provided on the same side plate 130, and the at least two first air outlet channels 120 are located on both sides of the grid plate group 200, and the at least two first air outlet channels 120 are centrally symmetrical.

[0055] Specifically, in this embodiment, a side plate 130 is provided with two first air outlet channels 120 that are centrally symmetrical with respect to the surface of the side plate 130, and the channel outline of the first air outlet channel 120 is triangular. The first air outlet channels 120 can be provided on both sides of the grid plate group 200, and the air outlet areas of the two first air outlet channels 120 are approximately equal and close to uniform flow.

[0056] It is worth mentioning that the second air outlet channel 410 and the third air outlet channel 510 are arranged opposite to each other and are both connected to the mounting cavity 110.

[0057] In addition, the two first air outlet channels 120 have the same channel area, and the second air outlet channel 410 and the third air outlet channel 510 have the same channel area, so that the gas flow is relatively uniform and the gas can be quickly discharged through the first air outlet channel 120, the second air outlet channel 410 or the third air outlet channel 510.

[0058] In summary, this utility model provides an arc extinguishing component 10. Through the coordinated action of the first air outlet channel 120 of the housing 100, the grid plate group 200, and the flame extinguishing plate 300, the electric arc is effectively cooled and divided in the arc extinguishing chamber, and only the generated gas is discharged. This not only effectively solves the problem of poor exhaust, but also prevents the escape of arc ions by the flame extinguishing plate 300 set in the first air outlet channel 120, which significantly improves the breaking capacity of the switch and enhances its operational stability and safety.

[0059] Furthermore, this utility model embodiment also provides a switch, which includes the arc extinguishing component 10 in the above embodiments. This not only achieves technical improvement over the traditional arc extinguishing structure, but also improves the switching efficiency, arc control accuracy and operational reliability at the overall system level.

[0060] 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 quenching assembly, characterized by, include: The housing (100) includes two opposing side plates (130) that form a mounting cavity (110). A grid assembly (200) is disposed in the mounting cavity (110); Flame extinguishing pad (300); It also includes a base plate (500) and a base (400), the base plate (500) and the base (400) together with the housing (100) to form the mounting cavity (110); At least one of the side plates (130) is provided with a first air outlet channel (120) communicating with the mounting cavity (110), the first air outlet channel (120) being located at the air outlet end of the grid plate group (200), and the flame extinguishing plate (300) being disposed in the first air outlet channel (120); and / or, the base (400) is provided with a second air outlet channel (410) communicating with the mounting cavity (110); and / or, the bottom plate (500) is provided with a third air outlet channel (510) communicating with the mounting cavity (110).

2. The arc extinguishing assembly of claim 1, wherein, The flame extinguishing plate (300) is also disposed in the second air outlet channel (410) and / or the third air outlet channel (510).

3. The arc extinguishing assembly of claim 1 or 2, characterized in that The number of flame extinguishing plates (300) is multiple, and the multiple flame extinguishing plates (300) are arranged in an overlapping manner.

4. The arc extinction assembly of claim 1, wherein, Both side plates (130) are provided with at least one first air outlet channel (120), and the first air outlet channels (120) on the two side plates (130) are arranged opposite to each other.

5. The arc extinguishing assembly of claim 4, wherein, The two opposing first air outlet channels (120) extend in a direction perpendicular to the extension direction of the second air outlet channel (410) and the third air outlet channel (510).

6. The arc extinguishing assembly of claim 1, wherein, The second air outlet channel (410) and the third air outlet channel (510) are arranged opposite to each other.

7. The arc- quenching assembly of claim 1, wherein, The projection of the grid group (200) on the side plate (130) partially overlaps, completely overlaps, or does not overlap with the first air outlet channel (120).

8. The arc extinction assembly of claim 1, wherein, The first air outlet channel (120) is exposed outside the base (400) and / or the bottom plate (500) to communicate with the external space.

9. The arc extinction assembly of claim 1, wherein, The same side plate (130) is provided with at least two first air outlet channels (120), and the at least two first air outlet channels (120) are located on both sides of the grid group (200), and the at least two first air outlet channels (120) are centrally symmetrical.

10. A switch, characterized by Includes the arc-extinguishing component as described in any one of claims 1-9.

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