Arc extinguish chamber and switch

Abstract

The utility model provides an arc extinguish chamber and a switch, and relates to the technical field of switches, the arc extinguish chamber is provided with an arc extinguish cavity, the tail end of the arc extinguish chamber is provided with a plurality of air outlets communicated with the arc extinguish cavity, a partition piece is arranged between every two adjacent air outlets, a plurality of grid pieces are arranged in the arc extinguish chamber, and the grid pieces and the air outlets are arranged at intervals in the same direction. A plurality of guiding pieces are arranged between the air outlets and the grid pieces at intervals, one end of each guiding piece is aligned to the corresponding air outlet, and the other end of each guiding piece is aligned to the grid piece right opposite to the partition piece so that a labyrinth type air outlet channel can be formed. According to the design, the circulation path of hot gas is remarkably increased, smooth flowing of fluid in the arc extinguishing chamber is ensured, the pressure of the gas outlet is reduced, the possibility that electric arcs return due to pressure difference is effectively reduced, the deionization effect is achieved to a certain extent, the secondary electric arc phenomenon in the arc extinguishing process is reduced, and the service life of the arc extinguishing chamber is prolonged. Therefore, the overall performance and safety of the arc extinguish chamber are improved.

Description

Technical Field

[0001] The present application relates to the field of switch technology, and in particular to an arc extinguishing chamber and a switch. Background Art

[0002] Switches are primarily used to connect, carry, and disconnect current under normal circuit conditions, and to complete these operations within a specified timeframe under abnormal circuit conditions. The switch's ability to interrupt overload or short-circuit currents relies primarily on an internal arc extinguishing chamber. When a fault current exceeds the set protection range, the switch's moving and stationary contacts rapidly open. The voltage between the contacts causes discharge in the air dielectric, generating a high-temperature arc. The arc is drawn into the grid area by the blowing force, splitting the long arc into multiple shorter segments. This increases the arc voltage, reducing the fault current and ultimately extinguishing the arc. After the arc is extinguished, the generated hot gases are discharged from the arc extinguishing chamber through the vents.

[0003] Existing arc extinguishing chambers, based on safety protection designs, often feature a mesh plate at the outlet to prevent direct contact between the outside and the metal inside. However, this design is not ideal for cooling the hot gases. To address this issue, some new arc extinguishing chambers incorporate a wire mesh at the outlet to cool the hot gases. However, this design increases flow resistance at the outlet, making the disconnection process more complex and demanding. Utility Model Content

[0004] The purpose of this application is to provide an arc extinguishing chamber and a switch to address the deficiencies in the above-mentioned prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In one aspect of an embodiment of the present application, an arc extinguishing chamber is provided, wherein the arc extinguishing chamber has an arc extinguishing cavity, a plurality of air outlets connected to the arc extinguishing cavity are arranged at the tail end of the arc extinguishing chamber, a partition is provided between two adjacent air outlets, a plurality of grids are provided in the arc extinguishing chamber, the plurality of grids and the plurality of air outlets are arranged at intervals along the same direction, a plurality of guide members are arranged at intervals between the plurality of air outlets and the plurality of grids, one end of the guide member is aligned with the air outlet, and the other end of the guide member is aligned with the grid facing the partition.

[0007] Optionally, the width of the air outlet along its arrangement direction is greater than or equal to the distance between two adjacent grid sheets, the guide member is provided corresponding to the air outlet, and the guide member is provided corresponding to at least part of the grid sheets.

[0008] Optionally, the ratio of the width of the air outlet along its arrangement direction to the distance between two adjacent grid sheets is greater than or equal to 2.

[0009] Optionally, the arc extinguishing chamber further includes a mesh plate, and the mesh plate is located between the gas outlet and the guide member.

[0010] Optionally, one end of the guide is aligned with a middle portion of the air outlet.

[0011] Optionally, the front end of the arc extinguishing chamber also has an opening connected to the arc extinguishing cavity, and a dynamic arc-striking plate and a static arc-striking plate are provided on opposite sides of the opening, and one end of the dynamic arc-striking plate and the static arc-striking plate extend into the arc extinguishing cavity through the opening.

[0012] Optionally, the guide is in a straight line shape or a broken line shape.

[0013] Optionally, the arc extinguishing chamber includes two first side plates that are opposite to each other and spaced apart, forming an arc extinguishing cavity between the two first side plates, and the guide member is integrally formed with the two first side plates, or the guide member is detachably connected to the two first side plates.

[0014] Optionally, second side panels are provided on both sides of the guide members perpendicular to their arrangement direction, multiple guide members are respectively inserted between the two second side panels, and the sides of the two second side panels facing away from each other are respectively detachably connected to the corresponding first side panels.

[0015] Optionally, the air outlet is integrally formed with the two first side panels, or the air outlet is detachably connected to the two first side panels.

[0016] Another aspect of an embodiment of the present application provides a switch, comprising a moving contact, a static contact, and an arc extinguishing chamber of any one of the above types, wherein the arc extinguishing chamber is arranged beside the moving contact and the static contact.

[0017] The beneficial effects of this application include:

[0018] This application provides an arc extinguishing chamber, which includes an arc extinguishing cavity. Multiple outlets connected to the arc extinguishing cavity are designed at the rear end of the arc extinguishing chamber. These outlets are arranged in an orderly manner, and partitions are provided between adjacent outlets to restrict the direct exhaust path of hot gases, forming independent channels. To further optimize the arc extinguishing effect, multiple grids are also provided within the arc extinguishing chamber. The grids and outlets are spaced apart in the same direction, forming an orderly array structure. This design not only helps to divide the arc into multiple short arcs, but also effectively increases the voltage during the arc extinguishing process, thereby reducing the fault current and ultimately achieving rapid arc extinction. Multiple guides are also provided between the grids and the outlets. One end of the guide is aligned with the outlet, and the other end is aligned with the grid facing the partition. This arrangement forms a labyrinthine outlet channel. This labyrinthine channel design significantly increases the flow path for hot gases, ensuring smooth flow of fluid within the arc extinguishing chamber and reducing pressure at the outlet. By extending the flow path for hot gases, this design effectively reduces the possibility of arc backflow due to pressure differentials. In addition, the design of the labyrinth channel has a certain degree of deionization effect, reducing the secondary arc phenomenon during the arc extinguishing process, thereby improving the overall performance and safety of the arc extinguishing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is one of the structural schematic diagrams of an arc extinguishing chamber provided in an embodiment of the present application;

[0021] Figure 2 This is a second structural diagram of an arc extinguishing chamber provided in an embodiment of the present application;

[0022] Figure 3 The third structural diagram of an arc extinguishing chamber provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of the connection between a guide member and a second side plate provided in an embodiment of the present application;

[0024] Figure 5 This is the fourth structural schematic diagram of an arc extinguishing chamber provided in an embodiment of the present application.

[0025] Icon: 1-air outlet; 2-partition piece; 3-grid; 4-guide piece; 5-mesh plate; 6-dynamic arc-starting plate; 7-static arc-starting plate; 8-first side plate; 9-second side plate. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it 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 rather that it can be slightly tilted.

[0031] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] The arc extinguishing chamber plays a vital role in switches. It can quickly interrupt the arc when a fault occurs in the circuit, preventing the high temperature of the arc from damaging the contacts and other electrical components inside the switch, thereby extending the life of the switch and the entire power system. Existing arc extinguishing chambers typically rely on the addition of mesh plates or wire mesh to improve the arc extinguishing effect. However, while the addition of mesh plates or wire mesh can effectively cool the hot gases, it also significantly increases the flow resistance at the outlet of the arc extinguishing chamber. This increased flow resistance can cause hot gases to accumulate in the arc extinguishing chamber, making the disconnection process more complex and demanding, and affecting the overall efficiency of the arc extinguishing chamber.

[0033] In view of the above problems, one aspect of the embodiments of the present application provides an arc extinguishing chamber, which can be used in a switch, which can be a circuit breaker, a transfer switch, etc. Figures 1 to 5 As shown, an arc extinguishing chamber is provided inside the arc extinguishing chamber. A plurality of gas outlets 1 connected to the arc extinguishing chamber are designed at the tail end of the arc extinguishing chamber. These gas outlets 1 are arranged in an orderly manner, and a partition 2 is provided between two adjacent gas outlets 1 to limit the direct discharge path of the hot gas and form an independent channel. In order to further optimize the arc extinguishing effect, a plurality of grids 3 are also provided in the arc extinguishing chamber. The grids 3 and the gas outlets 1 are arranged at intervals in the same direction to form an orderly array structure. This design not only helps to divide the arc into multiple short arcs, but also effectively increases the voltage during the arc extinguishing process, thereby reducing the fault current and ultimately achieving rapid extinction of the arc.

[0034] More importantly, if Figure 1 As shown, a plurality of guide members 4 are provided between the grid 3 and the gas outlet 1. One end of the guide member 4 is aligned with the gas outlet 1, and the other end is aligned with the grid 3 facing the partition 2. This arrangement forms a labyrinth-type gas outlet channel. The labyrinth channel design significantly increases the flow path of the hot gas, ensures the smooth flow of the fluid inside the arc extinguishing chamber, and reduces the pressure at the gas outlet 1. By extending the flow path of the hot gas, this design effectively reduces the possibility of the arc retreating due to the pressure difference. In addition, the design of the labyrinth-type channel plays a role in deionization to a certain extent, reduces the secondary arc phenomenon during the arc extinguishing process, and thus improves the overall performance and safety of the arc extinguishing chamber.

[0035] Optionally, one end of the guide 4 is aligned with the middle portion of the gas outlet 1. This alignment evenly divides each gas outlet 1 into two areas, rationally distributing the hot gas flow path. This avoids the potential for concentrated hot gas discharge during exhaust, effectively reduces the accumulation of hot gas in a single area, and thus prevents pressure imbalance at the gas outlet 1. This evenly distributed exhaust also helps reduce airflow resistance within the arc extinguishing chamber, thereby ensuring smooth hot gas flow within the arc extinguishing chamber.

[0036] Alternatively, as Figure 1 As shown, the width of the gas outlet 1 along its arrangement direction is greater than or equal to the spacing between two adjacent grids 3, the guide 4 is arranged corresponding to the gas outlet 1, and the guide 4 is arranged corresponding to at least part of the grid 3. This means that the spacing between two adjacent guides 4 is equal to the spacing between two adjacent gas outlets 1, and is greater than the spacing between two adjacent grids 3. This structural layout ensures that the flow of hot gas during the arc extinguishing process is smoother. Since the gap between two adjacent grids 3, the gap between the guides 4, and the gas outlet 1 constitute the main flow channel for the hot gas, the hot gas will first pass through the narrow gap between the grids 3, then enter the wider gap between the guides 4, and finally reach the gas outlet 1. This gradually widening design of the channel effectively reduces the resistance during the flow of hot gas, avoids the accumulation of hot gas in the arc extinguishing chamber, and thus improves the discharge efficiency of the hot gas.

[0037] Overall, this gradually widening channel design significantly improves the arc chamber's heat dissipation performance. Hot gases can flow more quickly from the interior of the arc chamber to the exterior, reducing pressure at outlet 1 and minimizing the risk of arc backflow. This design not only improves the overall efficiency of the arc chamber but also enhances the stability of the arc extinguishing process, ensuring safe operation in high-voltage and high-current environments. Through reasonable spacing design and channel optimization, the arc chamber can more effectively handle high-temperature hot gases, improving the efficiency and safety of the arc extinguishing process, and providing a solid guarantee for the reliable operation of electrical equipment.

[0038] Optionally, the ratio of the width of the gas outlet 1 along its arrangement direction to the spacing between two adjacent grids 3 is greater than or equal to 2. By setting a larger ratio between the width of the gas outlet 1 and the spacing between the grids 3, the hot gas has more space to circulate when it reaches the gas outlet 1, thereby reducing the flow resistance of the hot gas. This design not only ensures the rapid discharge of the hot gas, but also reduces pressure accumulation within the arc extinguishing chamber, preventing the high-temperature hot gas from being retained within the arc extinguishing chamber due to excessive flow resistance.

[0039] Specifically, by designing the width of the gas outlet 1 to be twice or greater than the spacing between adjacent grid plates 3, the hot gas flow path gradually widens. As the hot gas flows from the narrow channel between the grid plates 3 into the wider gas outlet 1, the increased space effectively controls the flow rate, reducing turbulence and backflow. This channel width design facilitates smoother discharge of the hot gas, preventing the arc from retreating due to pressure differences, thereby improving the stability and reliability of the arc extinguishing effect.

[0040] In summary, by rationally adjusting the ratio of the distance between the gas outlet 1 and the grid 3, this technical solution has achieved significant progress in enhancing the performance of the arc extinguishing chamber. This design not only optimizes the exhaust path of hot gases but also improves the stability of the arc extinguishing process, providing a key guarantee for the safe operation of electrical equipment under complex operating conditions.

[0041] Optionally, the guide member 4 is in a straight line shape or a broken line shape.

[0042] like Figure 1 As shown, the linear guide 4 guides the hot gas from the grid 3 area to the gas outlet 1 through a simple, direct path. The advantage of this design is that the hot gas flow path is clear, reducing airflow obstruction and deviation, ensuring that the hot gas passes quickly through the interior of the arc extinguishing chamber. This linear design is particularly suitable for applications requiring fast and efficient exhaust. It excels in reducing hot gas stagnation, helping to lower the pressure inside the arc extinguishing chamber and prevent the arc from reigniting due to pressure drop.

[0043] like Figure 2 As shown, the zigzag guide 4, along multiple zigzag paths, gradually redirects, converges, and ultimately exits the arc extinguishing chamber. The technical principle behind this design is that the complex flow path increases the flow resistance of the hot gas, allowing it to remain within the arc extinguishing chamber longer, thereby enhancing its cooling effect. Furthermore, the zigzag guide 4 effectively disperses and divides the hot gas flow, preventing localized accumulation of hot gas and thereby improving the heat dissipation efficiency of the entire arc extinguishing chamber.

[0044] Overall, the combined use of straight and zigzag guides 4 leverages their respective strengths under different operating conditions, effectively controlling and optimizing the flow of hot gases. The straight guide 4 streamlines the airflow path, increasing the exhaust velocity within the arc extinguishing chamber and ensuring safe operation under high-voltage, high-current conditions. The zigzag guide 4 extends the hot gas flow path, enhancing cooling and further reducing heat accumulation within the arc extinguishing chamber. This flexible design not only improves the overall efficiency of the arc extinguishing chamber but also enhances its adaptability to diverse electrical environments.

[0045] Optionally, the arc extinguishing chamber includes two first side plates 8 arranged opposite to each other and spaced apart, forming an arc extinguishing cavity between the two first side plates 8, and the guide member 4 is integrally formed with the two first side plates 8, or the guide member 4 is detachably connected to the two first side plates 8.

[0046] Specifically, guide member 4, as a flow guide component, primarily functions to guide and control the flow path of hot gas within the arc-extinguishing chamber. By properly designing the position and shape of guide member 4, hot gas can be effectively directed from the arc zone toward outlet 1, reducing resistance to the hot gas flow and preventing turbulence or backflow within the arc-extinguishing chamber, thereby improving arc extinguishing effectiveness.

[0047] There are two ways to connect the guide member 4 and the first side plate 8: integral molding and detachable connection. Figure 3 As shown, the one-piece design integrates the guide member 4 and the first side plates 8 on either side into a single, integrated structure, providing excellent strength and stability. This design offers the advantage of a compact structure, avoiding assembly errors and looseness that can occur with multiple components, thereby improving the reliability of the entire arc extinguishing chamber. Furthermore, the one-piece structure simplifies manufacturing and assembly, making it suitable for applications requiring high consistency and mass production.

[0048] Another implementation is a removable connection, where the guide member 4 is connected to the first side plate 8 using bolts, snaps, or other mechanical connections. This design provides greater flexibility, allowing for easy removal and reinstallation of the guide member 4 for maintenance or replacement. This flexible design is particularly suitable for scenarios requiring regular maintenance or adjustments to the guide member 4 based on different application requirements. The removable connection design also facilitates replacement or upgrades of the guide member 4, further enhancing the adaptability and long-term performance of the arc extinguishing chamber.

[0049] In summary, by rationally designing the connection method between the first side plate 8 and the guide member 4 in the arc extinguishing chamber, this technical solution has been optimized in terms of structural stability, flexibility, and ease of maintenance, making the application of arc extinguishing chambers in various electrical equipment more efficient, safe, and reliable.

[0050] Alternatively, as Figure 4 As shown, second side panels 9 are provided on both sides of the guide members 4 perpendicular to their arrangement direction, and multiple guide members 4 are inserted between the two second side panels 9. This design ensures that the multiple guide members 4 form an integrated structure before installation. This integrated structure not only facilitates subsequent installation operations, but also effectively reduces the difficulty of positioning individual guide members 4 during assembly.

[0051] Then, the two second side panels 9 are detachably connected to the corresponding first side panels 8 on their sides facing away from each other. This detachable connection allows the assembly of multiple guide members 4 and the second side panels 9 to be quickly and accurately installed into the main structure of the arc extinguishing chamber. This design combines multiple independent installation steps into a single, integrated operation, greatly simplifying the assembly process. Furthermore, this pre-formed, integrated structure ensures precise and consistent relative positioning of the multiple guide members 4, avoiding the potential for cumulative errors when installing a single guide member 4.

[0052] This design significantly improves arc chamber assembly efficiency and enhances the stability of the guide member 4 during operation. Because the guide member 4 and the second side plate 9 are already formed into a single unit before installation, assembly errors and time costs are significantly reduced. Furthermore, the detachable connection facilitates subsequent maintenance and replacement, further ensuring the service life and reliability of the entire arc chamber.

[0053] In general, by combining multiple guide members 4 and the second side plate 9 into an integral structure and detachably connecting them to the first side plate 8, this technical solution not only optimizes the assembly process of the arc extinguishing chamber, but also improves the stability and reliability of the structure, providing strong support for the efficient and safe operation of electrical equipment.

[0054] Gas outlet 1, serving as a channel for discharging hot gases within the arc-extinguishing chamber, directly impacts the efficiency of gas flow and the smoothness of the arc-extinguishing process. The connection between gas outlet 1 and first side panels 8 not only determines the structural integrity but also significantly impacts the stability and sealing of the arc-extinguishing chamber. Optionally, gas outlet 1 and the two first side panels 8 are integrally formed, or the gas outlet 1 and the two first side panels 8 are detachably connected.

[0055] Specifically, if Figure 3 As shown, the one-piece design integrates multiple air outlets 1 directly with the two first side panels 8 into an integral structure. For example, multiple partitions 2 are provided between the two first side panels 8, and the gap between two adjacent partitions 2 is the air outlet 1. The advantage of this design is that there is no gap or joint between the air outlet 1 and the first side panel 8, thereby ensuring the airtightness and structural integrity of the arc extinguishing chamber. The one-piece design is suitable for scenarios with high requirements for structural strength, and can effectively prevent loosening of components due to external vibration or impact, while reducing assembly errors caused by splicing of parts. In addition, this design is also more efficient in the production process, suitable for large-scale manufacturing, and reduces production costs.

[0056] Furthermore, the gas outlet 1 and the first side panel 8 are designed to be detachably connected. For example, multiple gas outlets 1 can be spliced between two first side panels 8, providing greater flexibility. This connection allows for easy removal of the gas outlet 1 when needed, facilitating subsequent maintenance, repair, or replacement. This design is particularly suitable for applications requiring regular inspection or adjustment of the gas outlet 1 structure under varying operating conditions. The detachable connection also allows for upgrades and modifications, allowing the arc extinguishing chamber to adapt to a wider range of needs while extending the equipment's service life.

[0057] Overall, the one-piece design ensures high airtightness and overall strength of the arc extinguishing chamber, making it suitable for applications requiring high strength and stability. The detachable connection solution, on the other hand, offers greater maintenance convenience and flexibility, making it suitable for applications requiring frequent adjustments and upgrades. Both designs offer their own advantages, and can be selected and applied based on actual operational requirements to optimize the performance of the arc extinguishing chamber.

[0058] Alternatively, as Figure 5 As shown, the arc extinguishing chamber also includes a mesh plate 5, located between the gas outlet 1 and the guide member 4, which performs both filtering and heat dissipation functions. Since the high-temperature, high-pressure gas generated during the arc extinguishing process may carry metal particles and other impurities, the mesh plate 5 effectively blocks these impurities, preventing them from entering the channel of the guide member 4, thereby protecting the integrity of the guide member 4. Simultaneously, the mesh plate 5 dissipates heat, lowering the temperature of the exhaust gas and preventing the high-temperature gas from directly impacting the equipment's external environment. This design improves the safety of the arc extinguishing system and extends the equipment's service life.

[0059] It should be noted that the guide member 4 is a rib structure made of insulating material, usually a high-strength, high-temperature resistant insulating material such as glass fiber reinforced plastic or ceramic. This material selection can ensure that the guide member 4 maintains structural stability while withstanding the impact of high-temperature gas, and will not experience electrical breakdown or deformation. In addition, the mesh plate 5 is also made of insulating material. This design can prevent the arc voltage from causing secondary discharge accidents through the metal medium, thereby improving the electrical safety of the arc extinguishing chamber. The insulating material of the mesh plate 5 is usually the same as that of the guide member 4, ensuring that no electrical connection is generated between different components inside the arc extinguishing chamber, further ensuring the safety of the entire system.

[0060] The arc-extinguishing grid 3, on the other hand, is made of a metal material. This material is chosen for its high electrical and thermal conductivity, enabling rapid arc segmentation and cooling. Metal grids 3 are typically made of conductive metals such as copper, aluminum, and steel. They effectively segment the arc and conduct heat, helping to quickly extinguish the arc. This material choice contrasts sharply with insulating materials, emphasizing the metal grid's crucial role in arc management while also isolating electrical risks through the insulating guides 4 and mesh plates 5, achieving an overall optimized effect.

[0061] To sum up, by arranging a mesh plate 5 made of insulating material between the air outlet 1 and the guide 4, and combining it with an arc-extinguishing grid 3 made of metal material, this technical solution not only achieves efficient arc extinguishing, but also takes into account the safety and durability of the equipment, and is suitable for application scenarios with high requirements for electrical safety and efficient arc extinguishing.

[0062] Alternatively, as Figure 1 As shown, the front end of the arc extinguishing chamber also has an opening that connects to the arc extinguishing cavity. A movable arc-striking plate 6 and a static arc-striking plate 7 are provided on opposite sides of the opening. One end of the movable arc-striking plate 6 and the static arc-striking plate 7 extend through the opening into the arc extinguishing cavity, ensuring that the arc generated by the movable and static contacts during opening can be quickly captured and guided into the arc extinguishing cavity along a predetermined path for treatment. Arc guidance is a key step in the arc extinguishing process. The coordinated action of the movable arc-striking plate 6 and the static arc-striking plate 7 effectively prevents the arc from spreading and irregularly propagating within the switch, thereby reducing damage to the equipment.

[0063] The moving arc-striking piece 6 and the static arc-striking piece 7 are usually made of high-temperature resistant and corrosion-resistant conductive materials, such as copper alloy or steel. The selection of these materials ensures that the arc-striking piece can maintain stability under the action of high-temperature arcs and has good conductivity, which helps to quickly guide the arc into the arc extinguishing cavity. At the same time, the shape and arrangement of the arc-striking piece have been carefully designed to ensure that the arc can be smoothly guided from the moving contact and the static contact to the arc extinguishing cavity without staying or spreading in other parts. Through this design, the arc-striking piece not only achieves efficient arc guidance, but also plays a certain arc diversion role, reduces the load in the arc extinguishing cavity, and further improves the arc extinguishing effect.

[0064] This design significantly improves the performance of the arc extinguishing chamber. First, guided by the moving arc-strike plate 6 and the static arc-strike plate 7, the arc can quickly enter the arc-extinguishing chamber, reducing the arc's residence time within the switch and lowering the risk of equipment damage. Second, the provision of the arc-strike plate makes the arc propagation path more controllable, preventing the arc from affecting other parts of the switch and improving the stability and safety of the entire switch system. Furthermore, this design simplifies the structure of the arc-extinguishing chamber, enabling it to more efficiently handle arcs from the automatic and static contacts, improving the overall efficiency of the arc extinguishing process.

[0065] In summary, by providing an opening at the front end of the arc-extinguishing chamber and configuring the movable arc-strike plate 6 and the static arc-strike plate 7, this technical solution successfully achieves efficient arc guidance and rapid arc extinguishing within the arc-extinguishing chamber. This design not only improves the operating efficiency of the arc-extinguishing chamber but also enhances the safety and reliability of electrical equipment, making it suitable for a variety of demanding electrical equipment applications.

[0066] On the other hand, an embodiment of the present application provides a switch, comprising a moving contact, a static contact, and an arc extinguishing chamber of any one of the above types, wherein the arc extinguishing chamber is arranged beside the moving contact and the static contact. The moving contact and the static contact serve as the main electrical contact points of the switch, and their working states directly affect the normal operation of the switch. When the switch is disconnected, an arc will be generated between the moving contact and the static contact. In order to effectively handle these arcs, the arc extinguishing chamber is arranged beside the moving contact and the static contact, so that the relative position relationship between the arc extinguishing chamber and the contact is more compact, and the arc can be effectively handled within the first time of its formation, thereby preventing the arc from damaging the internal components of the switch, and quickly extinguishing the arc to ensure the safe and stable operation of the switch. Since the switch adopts the above-mentioned arc extinguishing chamber, it also has the same beneficial effects as the arc extinguishing chamber, which will not be repeated here.

[0067] It should be understood that the switch can be a circuit breaker, a transfer switch, or other types of switches, and the embodiments of this application do not limit the type of switch. Regardless of the type of switch, an arc will be generated when its contacts are opened or switched. The design of the arc extinguishing chamber ensures that the arc can be effectively guided and extinguished during these operations, thereby protecting the internal components of the switch and ensuring safe and reliable operation.

[0068] The present application also provides a power distribution device equipped with the aforementioned switch. The power distribution device can be equipped with at least one of the following: a distribution box, cables, a distribution cabinet, a motor, a switch and socket, a lamp, an air conditioner, an electric water heater, an electric meter, a camera, a telephone, a computer, etc. Such power distribution equipment can utilize the switch-related structure of the present application to achieve intelligent management, but is not limited to the aforementioned intelligently managed power distribution equipment and can also be used in non-intelligent power distribution equipment in traditional industries.

[0069] Optionally, the embodiments of the present application can be used for: fire-fighting electricity: fire control room, fire pumps, smoke exhaust facilities, fire elevators and their drainage pumps, fire emergency lighting, etc. at level one; aisle lighting, duty lighting, guard lighting, obstacle sign lights; rail transit; security system power supply; electronic information room power supply; passenger elevator power; sewage pump; variable frequency speed regulation constant pressure water supply and domestic pump (otherwise a secondary load); main offices, conference rooms, general duty rooms, and archives rooms.

[0070] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An arc extinguishing chamber, characterized in that: The arc extinguishing chamber comprises an arc extinguishing cavity, a plurality of gas outlets (1) in communication with the arc extinguishing cavity are provided at the tail end of the arc extinguishing chamber, a partition (2) is provided between two adjacent gas outlets (1), a plurality of grids (3) are provided in the arc extinguishing chamber, the plurality of grids (3) and the plurality of gas outlets (1) are arranged at intervals along the same direction, a plurality of guides (4) are provided at intervals between the plurality of gas outlets (1) and the plurality of grids (3), one end of the guide (4) is aligned with the gas outlet (1), and the other end of the guide (4) is aligned with the grid (3) facing the partition (2).

2. The arc extinguishing chamber according to claim 1, characterized in that: The width of the air outlet (1) along its arrangement direction is greater than or equal to the spacing between two adjacent grid sheets (3); the guide member (4) is arranged corresponding to the air outlet (1); and the guide member (4) is arranged corresponding to at least part of the grid sheets (3).

3. The arc extinguishing chamber according to claim 2, characterized in that: The ratio of the width of the air outlet (1) along its arrangement direction to the spacing between two adjacent grid plates (3) is greater than or equal to 2.

4. The arc extinguishing chamber according to any one of claims 1 to 3, characterized in that: The arc extinguishing chamber further comprises a mesh plate (5), and the mesh plate (5) is located between the gas outlet (1) and the guide member (4).

5. The arc extinguishing chamber according to any one of claims 1 to 3, characterized in that: One end of the guide member (4) is aligned with the middle portion of the air outlet (1).

6. The arc extinguishing chamber according to any one of claims 1 to 3, characterized in that: The guide member (4) is in a straight line shape or a broken line shape.

7. The arc extinguishing chamber according to any one of claims 1 to 3, characterized in that: The arc extinguishing chamber comprises two first side plates (8) arranged opposite to each other and spaced apart, the arc extinguishing cavity is formed between the two first side plates (8), the guide member (4) and the two first side plates (8) are integrally formed, or the guide member (4) and the two first side plates (8) are detachably connected.

8. The arc extinguishing chamber according to claim 7, characterized in that: Second side panels (9) are respectively provided on both sides of the guide members (4) perpendicular to the arrangement direction thereof, and a plurality of the guide members (4) are respectively inserted between the two second side panels (9), and the sides of the two second side panels (9) facing away from each other are respectively detachably connected to the corresponding first side panels (8).

9. The arc extinguishing chamber according to claim 7, characterized in that: The air outlet (1) and the two first side panels (8) are integrally formed, or the air outlet (1) and the two first side panels (8) are detachably connected.

10. A switch, characterized in that: It comprises a moving contact, a static contact and the arc extinguishing chamber according to any one of claims 1 to 9, wherein the arc extinguishing chamber is arranged beside the moving contact and the static contact.

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