Moving arc angle, magnetic plate, magnetic drive arc structure, arc extinguishing structure, DC switch

Abstract

The present application relates to a structural component of a DC switch. Aiming at the technical problem that the arc voltage of a low-voltage DC switch is difficult to increase when the system voltage increases, a moving arc angle, a magnetic conductive plate, a magnetically driven arc structure, an arc extinguishing structure, and a DC switch are provided. The moving arc angle includes an arc-inducing portion, an arc-running zone, an arc-burning zone, and a magnetizing portion. The magnetic conductive plate includes a first magnetic conductive side plate, a second magnetic conductive side plate, a first connecting portion, a second connecting portion, and a magnetizing zone. The magnetic conductive plate is applied to the magnetically driven arc structure. The magnetic conductive plate can be magnetized under the action of a permanent magnet to externally display corresponding magnetism. Combined with the structures of the arc-inducing portion, the arc-running zone, the arc-burning zone, the magnetizing portion, and other parts of the moving arc angle, an enhanced magnetic field effect can be generated at different positions of the arc movement, so that the arc can fully enter the arc extinguishing chamber. Combined with the structure of the arc extinguishing chamber, the full range of coverage from small current to short-circuit current can be achieved, effectively solving the problem of breaking high-voltage non-polarity arcs.

Description

Technical Field

[0001] The present application relates to a structural component of a DC switch, and specifically to a moving arc angle, a magnetic conductive plate, a magnetically driven arc structure, an arc extinguishing structure, and a DC switch. Background Art

[0002] The high-voltage development trend of new energy systems such as photovoltaics and energy storage has put forward higher requirements for DC switchgear. Among them, low-voltage DC switches are mostly based on the principle of increasing the arc voltage trend to promote arc breaking. The increase in system voltage makes it much more difficult for DC switches to further increase the arc voltage under limited volume. Especially for small currents such as critical current and rated current, it is more difficult to increase the voltage of these small current arcs because the magnetic blowing and air blowing arcs generated by themselves have little effect, which may lead to a reduction in the electrical life of the DC switch, or serious consequences such as breaking failure. Utility Model Content

[0003] The present application aims to solve the technical problem that arc voltage of a low-voltage DC switch is difficult to increase when the system voltage increases, and provides a moving arc angle, a magnetic conductive plate, a magnetically driven arc structure, an arc extinguishing structure, and a DC switch.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In a first aspect, the present application proposes a moving arc angle adapted to a magnetic conductive plate, wherein the magnetic conductive plate comprises a first magnetic conductive side plate, a second magnetic conductive side plate, a first connecting portion, a second connecting portion, and a magnetized region;

[0006] The moving arc angle includes a magnetizing portion, and an arcing portion, an arc running area, and an arc burning area, which are located between the first magnetic conductive side plate and the second magnetic conductive side plate and are connected in sequence; the magnetizing portion, the arcing portion, the arc running area, and the arc burning area are all made of metal materials that can conduct electricity and magnetism;

[0007] The arc running area is arc-shaped and matches the arc-shaped structures on the first magnetic conductive side plate and the second magnetic conductive side plate respectively; a long hole is opened on the arc running area;

[0008] The width of the arc burning zone is greater than or equal to the width of the arc running zone;

[0009] The magnetization part is connected to the rear end of the arc burning zone; the magnetization part includes a first magnetization surface and a second magnetization surface connected to each other, the first magnetization surface and the second magnetization surface are perpendicular to each other, and the first magnetization surface is located between the first magnetic conductive side plate and the second magnetic conductive side plate; the side edge of the first magnetization surface is connected to the rear end of the arc burning zone, and the first magnetization surface is arranged opposite to the arcing part.

[0010] Furthermore, the second magnetization surface is perpendicular to the plane where the arcing zone is located.

[0011] Furthermore, the arc-inducing portion, arc-running zone, arc-burning zone and magnetizing portion are an integrated structure.

[0012] In the second aspect, the present application proposes a magnetic conductive plate adapted to the above-mentioned moving arc angle:

[0013] The magnetic conductive plate includes a first magnetic conductive side plate, a second magnetic conductive side plate, a first connecting portion, a second connecting portion and a magnetized area; the first magnetic conductive side plate and the second magnetic conductive side plate are both provided with an arc structure adapted to the arc running area;

[0014] The first magnetic conductive side plate is connected to the magnetized area via the first connecting portion, and the second magnetic conductive side plate is connected to the magnetized area via the second connecting portion; the first magnetic conductive side plate and the second magnetic conductive side plate are parallel to each other, and the first connecting portion and the second connecting portion are parallel to each other.

[0015] Furthermore, the first magnetic conductive side plate and the second magnetic conductive side plate have the same structure; the first magnetic conductive side plate includes a flat plate portion and an arc-shaped portion connected to each other;

[0016] The first connecting portion is connected to the arc-shaped portion;

[0017] The curvature of the arc-shaped portion is smaller than the curvature of the arc running area.

[0018] Furthermore, the materials of the first magnetic conductive side plate, the second magnetic conductive side plate, the first connecting portion, the second connecting portion and the magnetized region are all ferromagnetic.

[0019] In a third aspect, the present application proposes a magnetically driven arc structure, comprising a permanent magnet; the above-mentioned moving arc angle, and the above-mentioned magnetic conductive plate;

[0020] The arc attracting portion, arc running area, arc burning area and the first magnetization surface are all located between the first magnetic conductive side plate and the second magnetic conductive side plate;

[0021] The arcing area corresponds to the arc-shaped structural position on the first magnetic conductive side plate and the second magnetic conductive side plate, and a gap is left between the arcing area and the magnetization area; the permanent magnet is installed in the gap between the arcing area and the magnetization area, and the first polarity surface of the permanent magnet contacts the magnetization area, and the second polarity surface contacts the arcing area;

[0022] The first magnetic conductive side plate and the second magnetic conductive side plate extend above and below the surface of the first magnetizing surface respectively.

[0023] In a fourth aspect, the present application proposes an arc extinguishing structure, including a moving contact, a stationary contact, a stationary arc angle, an arc extinguishing chamber and an arc isolation wall; and the above-mentioned magnetically driven arc structure;

[0024] The moving contact and the static contact are both connected to the front end of the arcing part;

[0025] The static arcing area of ​​the static arc angle is parallel to the arcing area;

[0026] The magnetizing portion, a portion of the first magnetic conductive side plate, a portion of the second magnetic conductive side plate and the arc extinguishing chamber are all located between the static arc burning zone and the arc burning zone.

[0027] Further, the arc extinguishing chamber includes at least one double-insulated narrow-slot arc extinguishing chamber; the double-insulated narrow-slot arc extinguishing chamber includes a bottom, a protruding portion and two side portions;

[0028] The two side parts are arranged in parallel, and one end of the two side parts is connected through the bottom; the bottom is provided with a fracture;

[0029] The side of the bottom close to the other end of the side portion is defined as the inner side; the protrusion includes a first protrusion and a second protrusion, one end of the first protrusion and the second protrusion are respectively connected to the inner side of the fracture and extend inward from the fracture, the other ends of the first protrusion and the second protrusion intersect and are connected, and a chamber connected to the fracture is formed between the first protrusion and the second protrusion; a first slit is formed between one of the side portions and the first protrusion, and a second slit is formed between the other side portion and the second protrusion;

[0030] A plurality of air outlets are provided at the bottoms on both sides of the fracture, respectively communicating with the first slit and the second slit.

[0031] Furthermore, the arc extinguishing chamber further comprises at least one metal grid arc extinguishing chamber; the metal grid arc extinguishing chamber comprises a plurality of metal grids parallel to each other;

[0032] The metal grid arc extinguishing chamber is placed overlappingly with the double-insulated narrow-slit arc extinguishing chamber.

[0033] Furthermore, the first magnetic conductive side plate and the second magnetic conductive side plate respectively extend to the outside of the arcing portion and to the contact area between the moving contact and the static contact.

[0034] In a fifth aspect, the present application proposes a DC switch, wherein the arc extinguishing structure in the DC switch adopts the above-mentioned arc extinguishing structure.

[0035] Compared with the prior art, this application has the following beneficial effects:

[0036] The present application proposes a moving arc angle and a magnetic conductive plate that are used in conjunction with each other. The moving arc angle includes an arc-inducing portion, an arc-running zone, an arc-burning zone and a magnetization portion. The magnetic conductive plate includes a first magnetic conductive side plate, a second magnetic conductive side plate, a first connecting portion, a second connecting portion and a magnetization zone. The magnetic conductive plate is applied to a magnetically driven arc structure. The magnetic conductive plate can be magnetized under the action of a permanent magnet to externally display corresponding magnetism. Combined with the structures of the arc-inducing portion, the arc-running zone, the arc-burning zone, the magnetization portion and other parts of the moving arc angle, an enhanced magnetic field effect can be generated at different positions of the arc movement, so that the arc can fully enter the arc extinguishing chamber. Combined with the structure of the arc extinguishing chamber, full coverage of small currents to short-circuit currents can be achieved, effectively solving the problem of breaking high-voltage non-polarity arcs.

[0037] The present application also proposes an arc extinguishing structure and a DC switch, which also have the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A structural schematic diagram of the moving arc angle of this application;

[0040] Figure 2 A schematic diagram of the structure of the magnetic conductive plate of the present application;

[0041] Figure 3 A schematic diagram of a magnetically driven arc structure of the present application;

[0042] Figure 4 A structural schematic diagram of the arc extinguishing structure of this application;

[0043] Figure 5 A schematic diagram of the structure of an arc extinguishing chamber in an embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of the structure of the arc separation wall in the embodiment of the present application;

[0045] Figure 7 This is a schematic diagram of a structure in which a double-insulated narrow-slit arc-extinguishing chamber and an arc-isolating wall are connected as an integrated whole in an embodiment of the present application.

[0046] Among them: 11-arcing part, 12-arcing zone, 13-arcing zone, 14-magnetization part, 141-first magnetization surface, 142-second magnetization surface, 21-magnetization zone, 22-first magnetic conductive side plate, 23-second magnetic conductive side plate, 24-first connecting part, 25-second connecting part, 26-arc-shaped part, 27-flat plate, 3-permanent magnet, 4-moving contact, 5-static contact, 6-static arc angle, 7-arcing chamber, 71-double insulation narrow slit arcing chamber, 711-protrusion, 712-side, 713-first slit, 714-chamber, 715-gas outlet, 716-break, 717-first protrusion, 718-second protrusion, 719-second slit, 720-bottom, 8-arc isolation wall, 61-static arcing zone 61, 72-metal grid arcing chamber. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] 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 for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0049] 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, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] A DC switch, also known as a DC circuit breaker, is an electrical switching device used to control a DC circuit. The arc extinguishing structure is an important structural part of a DC switch. The arc extinguishing structure is a device used in a DC switch to extinguish the arc to prevent the arc from damaging the contacts and other components inside the switch. When the switch disconnects the circuit, an arc will be generated between the contacts due to the instantaneous interruption of the current. This can effectively protect the contacts and other components inside the switch, and improve the reliability and service life of the switch.

[0054] In practical applications, the arc extinguishing structure usually includes moving contacts, static contacts, static arc angles, arc extinguishing chambers, arc isolation walls and magnetic drive arc structures:

[0055] Among them, the moving contact and the static contact are the main components responsible for the circuit connection and disconnection in the DC switch. When the switch is closed, the moving contact and the static contact are in contact, and the circuit is turned on; when the switch is opened, the moving contact and the static contact are separated, and an arc is generated. The static arc angle is a special structure set near the static contact, which is used to guide and change the path of the arc. When the moving contact and the static contact are separated to generate an arc, the static arc angle can guide the arc into the arc extinguishing chamber, thereby accelerating the arc extinguishing process. The arc extinguishing chamber is the core component of the arc extinguishing structure, which is used to limit the development of the arc and accelerate its extinguishing. When the arc enters the arc extinguishing chamber, it will be rapidly cooled and extinguished by the internal medium. The arc isolation wall is used to further divide and limit the development of the arc, and can divide the arc into multiple small segments, thereby accelerating its extinguishing process. At the same time, the arc isolation wall can also prevent the arc from damaging other components inside the arc extinguishing chamber. The magnetically driven arc structure is a technology that uses magnetic field force to drive the movement of the arc. By setting a specific magnetic field structure in the arc extinguishing structure, the arc can move quickly and elongate under the action of the magnetic field force, thereby increasing the contact area between the arc and the surrounding medium, accelerating its cooling and extinguishing process, and effectively improving the performance and reliability of the arc extinguishing structure.

[0056] The present application aims to solve the technical problem that the arc voltage of a low-voltage DC switch is difficult to increase when the system voltage increases. The present application provides a moving arc angle, a magnetic conductive plate, a magnetically driven arc structure, an arc extinguishing structure, and a DC switch. The present application is described in detail below in conjunction with the embodiments and drawings.

[0057] like Figure 1 As shown, it is a structural schematic diagram of the moving arc angle of the present application. The moving arc angle is used in combination with the magnetic conductive plate. The moving arc angle includes a magnetizing portion 14, and an arcing portion 11, an arc running zone 12 and an arc burning zone 13 connected in sequence. The materials of the magnetizing portion 14, the arcing portion 11, the arc running zone 12 and the arc burning zone 13 are all metal materials that can conduct electricity and conduct magnetism. In practical applications, there are many metal materials that can conduct electricity and conduct magnetism, such as copper, aluminum, tungsten, etc., which can be selected according to the properties of each metal material and the application requirements, and this application does not limit it. The arc generated during the contact separation process will be guided and elongated by the moving arc angle, so that the arc enters a specific area and is extinguished. Among them, the magnetizing portion 14 is mainly used to generate an enhanced magnetic field to effectively control and elongate the arc, and the arcing portion 11 guides the generated arc to a predetermined path. The arc running zone 12 enables the guided arc to move and elongate quickly, increasing the contact area with the surrounding cooling medium. The arc burning zone 13 further compresses and burns the arc until it is finally extinguished. The design of this zone can ensure sufficiently high temperature and pressure to quickly consume the energy of the arc.

[0058] A connection portion connected to the moving contact 4 may also be provided at the front end of the arcing portion 11 .

[0059] The arc running area 12 is arc-shaped, respectively matching the arc-shaped structures on the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 in the magnetic conductive plate. A long hole is provided on the arc running area 12, and the specific size of the long hole can be adjusted according to actual requirements. The width of the arc burning area 13 is greater than or equal to the width of the arc running area 12, which comprehensively meets the arc extinguishing effect.

[0060] The magnetization part 14 is connected to the rear end of the arc burning zone 13, and the magnetization part 14 includes a first magnetization surface 141 and a second magnetization surface 142 connected to each other. The first magnetization surface 141 and the second magnetization surface 142 are perpendicular to each other. The first magnetization surface 141 is located between the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23. The side of the first magnetization surface 141 is connected to the rear end of the arc burning zone 13, and the first magnetization surface 141 is arranged opposite to the arcing part 11.

[0061] In this embodiment, the second magnetizing surface 142 is perpendicular to the plane where the arc burning zone 13 is located. In actual processing, the arcing portion 11, the arc running zone 12, the arc burning zone 13, and the magnetizing portion 14 can be an integrated structure, or part of them can be an integrated structure. For example, the arcing portion 11, the arc running zone 12, and the arc burning zone 13 are a whole, and the magnetizing portion 14 is a separate component, which is in contact with and connected to the arc burning zone 13. It can be selected according to actual processing needs as long as it does not affect the actual application effect.

[0062] like Figure 2 As shown, it is a schematic diagram of the structure of the magnetic plate of the present application. The magnetic plate is used in conjunction with the dynamic arc angle proposed in the present application, and may include a first magnetic side plate 22, a second magnetic side plate 23, a first connecting portion 24, a second connecting portion 25, and a magnetized area 21. In practical applications, the material of the magnetic plate is generally ferromagnetic, which is a substance with strong magnetism. Under the action of an external magnetic field, the magnetism can be significantly enhanced.

[0063] The first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 are both provided with an arc structure for matching with the arc running area 12. In practical applications, the curvature and extension length of the arc structure can be adjusted according to the use requirements. The first magnetic conductive side plate 22 is connected to the magnetization area 21 through the first connecting portion 24, and the second magnetic conductive side plate 23 is connected to the magnetization area 21 through the second connecting portion 25. The first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 are parallel to each other, and the first connecting portion 24 and the second connecting portion 25 are parallel to each other. The first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 are placed in parallel, forming a magnetic field channel therebetween. The magnetic field generated by the current will be guided and concentrated by the two magnetic conductive side plates, thereby reducing the loss of the magnetic field and improving the electromagnetic efficiency. The magnetization area 21 is located between the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23. This area is where the magnetic field is most concentrated and is also the main place for electromagnetic energy conversion. In addition, the magnetic conductive plate is usually made of ferromagnetic material. Ferromagnetic material is usually made of iron, cobalt, nickel and various alloys and has the characteristic of spontaneous magnetization.

[0064] In this embodiment, the first magnetic conductive side plate 22 has the same structure as the second magnetic conductive side plate 23. Taking the structure of the first magnetic conductive side plate 22 as an example, the first magnetic conductive side plate 22 includes an arc portion 26 and a flat plate portion 27 connected to each other, and the arc portion 26 is similar to the arc structure of the arc running area 12 of the moving arc angle, and usually, the arc of the arc portion 26 is smaller than the arc of the arc running area 12.

[0065] It should be noted that Figure 2 The magnetic conductive plate structure shown in is only the structure of the magnetic conductive plate in this embodiment. In other embodiments of the present application, the specific shape, thickness, specific structure of the first connecting part 24 and the second connecting part 25, etc. of the magnetic conductive plate can also be adjusted according to the use requirements and the specific situation of the moving arc angle.

[0066] like Figure 3 As shown, it is a structural schematic diagram of the magnetic drive arc structure of the present application. The magnetic drive arc structure may include a permanent magnet 3, a moving arc angle proposed in the present application, and a magnetic conductive plate proposed in the present application. The moving arc angle and the magnetic conductive plate may adopt all the corresponding embodiment structures mentioned above, which will not be described separately here.

[0067] The arcing portion 11, the arcing zone 12, the arcing zone 13 and the first magnetizing surface 141 are all located between the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23. The arcing zone 12 corresponds to the arc-shaped structural position on the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23. A gap is left between the arcing zone 12 and the magnetizing zone 21. The permanent magnet 3 is installed in the gap between the arcing zone 12 and the magnetizing zone 21. The first polarity surface of the permanent magnet 3 is in contact with the magnetizing zone 21, and the second polarity surface is in contact with the arcing zone 12. The first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 extend to the upper and lower sides of the surface of the first magnetizing surface 141, respectively, without exceeding the magnetizing portion 14, and can effectively guide the magnetic field to the magnetizing portion 14, thereby enhancing the magnetic field strength in this area. In addition, by limiting the extension range of the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23, the distribution and strength of the magnetic field can be accurately controlled.

[0068] It should be noted that the permanent magnet 3 has two polarity faces, namely the N pole and the S pole. These two polarity faces are where the magnetism on the permanent magnet 3 is strongest, and are also where the magnetic field lines enter and exit the permanent magnet 3.

[0069] In practical applications, the permanent magnet 3 provides a stable magnetic field. By changing the position and polarity of the permanent magnet 3, the behavior of the arc can be regulated to meet the needs of different applications. When the current passes through the moving arc angle, an arc is generated at its tip. The magnetic conductive plate is mainly used to guide and concentrate the magnetic field to improve the utilization rate of the magnetic field. In the magnetic drive arc structure, the magnetic conductive plate can help guide the magnetic field generated by the permanent magnet 3 to the vicinity of the moving arc angle, thereby enhancing the magnetic driving force of the arc and making the arc more stable and controllable.

[0070] In this embodiment, the ends of the arc-shaped portions 26 of the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 exceed the ends of the arc-inducing portion 11 and extend to the area where the moving contact 4 and the stationary contact 5 of the DC switch involved are located. Since the function of the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 is to guide the magnetic field to the contact area between the moving contact 4 and the stationary contact 5, such a structural design in this embodiment can enhance the magnetic field strength in the contact area, thereby affecting the extinguishing process of the arc. In addition, the ends of the arc-shaped portions 26 of the first magnetic conductive side plate 22 and the second magnetic conductive side plate 23 exceed the ends of the arc-inducing portion 11, which can not only guide the magnetic field in the arc-inducing portion 11, but also play a role in a wider area where the moving contact 4 and the stationary contact 5 are located, which helps to better control the path and extinguishing process of the arc.

[0071] like Figure 4 As shown, it is a structural schematic diagram of the arc extinguishing structure of the present application. The arc extinguishing structure may include a moving contact 4, a stationary contact 5, a stationary arc angle 6, an arc extinguishing chamber 7, an arc isolation wall 8 and a magnetically driven arc structure. Among them, the moving contact 4 and the stationary contact 5 are both located at one end of the arcing portion 11 of the moving arc angle, and the connecting portion between the moving contact 4 and the arcing portion 11 can be connected by a soft wire. The stationary contact 5 and the stationary arc angle 6 are an integral structure or fixedly connected. The end of the stationary arc angle 6 away from the stationary contact 5 has an arc burning zone 13, and the planes of the stationary arc burning zone 61 and the arc burning zone 13 of the stationary arc angle 6 are parallel to each other. The magnetization portion 14 of the moving arc angle, the flat plate portion 27 of the first magnetic conductive side plate 22, the flat plate portion 27 of the second magnetic conductive side plate 23 and the arc extinguishing chamber 7 are all located between the static arc burning zone 61 and the arc burning zone 13.

[0072] In practical applications, the arc extinguishing chamber 7 may have a variety of structural forms, for example, a single structural form or a combined structural form. Figure 5 As shown, it is a schematic diagram of the structure of an arc extinguishing chamber 7, which is a double-insulated narrow-slit arc extinguishing chamber 71, and can include a bottom 720, a protrusion 711 and two side portions 712. The two side portions 712 are arranged in parallel, and one end of the two side portions 712 is connected through the bottom 720. The bottom 720 is provided with a break 716. The side of the bottom 720 close to the other end of the side portion 712 is defined as the inner side. The protrusion 711 includes a first protrusion 717 and a second protrusion 718, one end of the first protrusion 717 and the second protrusion 718 are respectively connected to the inner side of the break 716, and extend inward from the break 716, the other ends of the first protrusion 717 and the second protrusion 718 intersect and are connected, and a chamber 714 connected to the break 716 is formed between the first protrusion 717 and the second protrusion 718. A first slit 713 is formed between one side portion 712 and the first protrusion 717, and a second slit 719 is formed between the other side portion 712 and the second protrusion 718. The bottom 720 located on both sides of the fracture 716 is provided with a plurality of gas outlets 715, which are connected to the first slit 713 and the second slit 719 respectively. The gas outlets 715 allow the gas and heat generated during the arc extinguishing process to be quickly discharged from the arc extinguishing chamber 7. In practical applications, by designing the narrow slit, the arc is compressed and cooled when passing through the narrow slit, thereby accelerating the extinction of the arc. In addition, the design of the narrow slit can reduce the diameter of the arc, increase the contact area between the arc and the wall of the arc extinguishing chamber 7, and improve the cooling effect. The double insulation design can also enhance the insulation performance of the arc extinguishing chamber 7. In practical applications, the overall material of the double insulation narrow slit arc extinguishing chamber 71 can be made of high temperature resistant insulating material, thereby increasing the service life of the arc extinguishing chamber 7.

[0073] In this embodiment, a structural form of a combination of a double-insulated narrow-slit arc-extinguishing chamber 71 and a metal grid arc-extinguishing chamber 72 is adopted. The metal grid arc-extinguishing chamber 72 includes a plurality of metal grids that are overlapped and spaced from each other. The metal grid arc-extinguishing chamber 72 and the double-insulated narrow-slit arc-extinguishing chamber 71 are overlapped, that is, one or more metal grid arc-extinguishing chambers 72 and double-insulated narrow-slit arc-extinguishing chambers 71 are overlapped between the static arcing zone 61 and the arcing zone 13. The specific number of settings can be adjusted according to usage requirements.

[0074] like Figure 6 As shown in FIG. 8 , it is a schematic diagram of the structure of the arc isolation wall 8 in this embodiment. Figure 7 As shown, it is a schematic diagram of the double-insulated narrow-slit arc-extinguishing chamber 71 and the arc-isolating wall 8 connected as an integral structure in this embodiment. The arc-isolating wall 8 includes two parallel and connected flat plates, the arc-inducing portion 11 is located between the two flat plates, the first magnetic conductive side plate 22 is located on the upper flat plate, and the second magnetic conductive side plate 23 is located under the lower flat plate. In other embodiments of the present application, the specific structure of the arc-isolating wall 8 can also be adaptively adjusted according to different embodiments of the moving arc angle and the magnetic conductive plate.

[0075] In the present application, the magnetic conductive plate is magnetized under the action of the permanent magnet 3 to show the corresponding magnetism to the outside. Combined with the arc-inducing part 11, the arc-running area 12, the arc-burning area 13 and the magnetization part 14 of the moving arc angle, an enhanced magnetic field effect can be generated on different positions of the arc movement, so that the arc can fully enter the double-insulated narrow-slit arc-extinguishing chamber 71 and the metal grid arc-extinguishing chamber 72. The double-insulated narrow-slit arc-extinguishing chamber 71 has a better arc-extinguishing effect on smaller currents, and the metal grid arc-extinguishing chamber 72 has a good arc-breaking effect on larger currents. The combination of the two can achieve full coverage of small currents to short-circuit currents, effectively solving the problem of breaking high-voltage non-polarity arcs.

[0076] Based on the above structure, the present application also proposes a DC switch, wherein the arc extinguishing structure adopts the arc extinguishing structure proposed in the present application. The specific structure can adopt the structure in the above embodiment, which will not be repeated here.

[0077] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A moving arc angle, characterized in that: Adapted to the magnetic conductive plate, the magnetic conductive plate comprises a first magnetic conductive side plate (22), a second magnetic conductive side plate (23), a first connecting portion (24), a second connecting portion (25) and a magnetized area (21); The moving arc angle comprises a magnetizing portion (14), and an arcing portion (11), an arc running area (12) and an arc burning area (13) which are located between a first magnetic conductive side plate (22) and a second magnetic conductive side plate (23) and are connected in sequence; the magnetizing portion (14), the arcing portion (11), the arc running area (12) and the arc burning area (13) are all made of metal materials that are both electrically conductive and magnetically conductive; The arc running area (12) is arc-shaped and is respectively adapted to the arc-shaped structures on the first magnetic conductive side plate (22) and the second magnetic conductive side plate (23); a long hole is provided on the arc running area (12); The width of the arc burning zone (13) is greater than or equal to the width of the arc running zone (12); The magnetizing portion (14) is connected to the rear end of the arcing zone (13); the magnetizing portion (14) comprises a first magnetizing surface (141) and a second magnetizing surface (142) which are connected to each other, the first magnetizing surface (141) and the second magnetizing surface (142) being perpendicular to each other, and the first magnetizing surface (141) being located between the first magnetic conductive side plate (22) and the second magnetic conductive side plate (23); the side edge of the first magnetizing surface (141) is connected to the rear end of the arcing zone (13), and the first magnetizing surface (141) is arranged opposite to the arcing portion (11).

2. The moving arc angle according to claim 1, characterized in that The second magnetizing surface (142) and the plane where the arc burning zone (13) is located are perpendicular to each other.

3. The moving arc angle according to claim 2, characterized in that The arc-inducing portion (11), the arc-running zone (12), the arc-burning zone (13) and the magnetizing portion (14) are an integrated structure.

4. A magnetic conductive plate, characterized in that: Adapted to the moving arc angle described in any one of claims 1 to 3: The magnetic conductive plate comprises a first magnetic conductive side plate (22), a second magnetic conductive side plate (23), a first connecting portion (24), a second connecting portion (25) and a magnetized area (21); the first magnetic conductive side plate (22) and the second magnetic conductive side plate (23) are both provided with an arc structure adapted to the arc running area (12); The first magnetic conductive side plate (22) is connected to the magnetized area (21) via the first connecting portion (24), and the second magnetic conductive side plate (23) is connected to the magnetized area (21) via the second connecting portion (25); the first magnetic conductive side plate (22) and the second magnetic conductive side plate (23) are parallel to each other, and the first connecting portion (24) and the second connecting portion (25) are parallel to each other.

5. The magnetic conductive plate according to claim 4, characterized in that: The first magnetic conductive side plate (22) and the second magnetic conductive side plate (23) have the same structure; the first magnetic conductive side plate (22) comprises a flat plate portion (27) and an arc-shaped portion (26) connected to each other; The first connecting portion (24) is connected to the arc-shaped portion (26); The curvature of the arc-shaped portion (26) is smaller than the curvature of the arc running area (12).

6. The magnetic conductive plate according to claim 4 or 5, characterized in that: The materials of the first magnetic conductive side plate (22), the second magnetic conductive side plate (23), the first connecting portion (24), the second connecting portion (25) and the magnetized region (21) are all ferromagnetic.

7. A magnetically driven arc structure, comprising a permanent magnet (3); characterized in that: It also includes the moving arc angle described in any one of claims 1 to 3, and the magnetic conductive plate described in any one of claims 4 to 6; The arcing portion (11), the arc running area (12), the arc burning area (13) and the first magnetization surface (141) are all located between the first magnetic conductive side plate (22) and the second magnetic conductive side plate (23); The arcing zone (12) corresponds to the arc-shaped structural position on the first magnetic conductive side plate (22) and the second magnetic conductive side plate (23), and a gap is left between the arcing zone (12) and the magnetizing zone (21); the permanent magnet (3) is installed in the gap between the arcing zone (12) and the magnetizing zone (21), and the first polarity surface of the permanent magnet (3) is in contact with the magnetizing zone (21), and the second polarity surface is in contact with the arcing zone (12); The first magnetic conductive side plate (22) and the second magnetic conductive side plate (23) extend respectively above and below the surface of the first magnetizing surface (141).

8. An arc extinguishing structure, comprising a moving contact (4), a stationary contact (5), a stationary arc angle (6), an arc extinguishing chamber (7) and an arc separation wall (8); characterized in that: Also includes the magnetic driven arc structure of claim 7; The moving contact (4) and the stationary contact (5) are both connected to the front end of the arcing portion (11); The static arcing area (61) of the static arcing angle (6) and the arcing area (13) are parallel to each other; The magnetizing portion (14), a portion of the first magnetic conductive side plate (22), a portion of the second magnetic conductive side plate (23) and the arc extinguishing chamber (7) are all located between the static arc burning zone (61) and the arc burning zone (13).

9. The arc extinguishing structure according to claim 8, characterized in that: The arc extinguishing chamber (7) comprises at least one double-insulated narrow-slot arc extinguishing chamber (71); the double-insulated narrow-slot arc extinguishing chamber (71) comprises a bottom (720), a protruding portion (711) and two side portions (712); The two side portions (712) are arranged in parallel, and one end of the two side portions (712) is connected through the bottom portion (720); the bottom portion (720) is provided with a fracture (716); The side of the bottom (720) close to the other end of the side (712) is defined as the inner side; the protrusion (711) includes a first protrusion (717) and a second protrusion (718), one end of the first protrusion (717) and the second protrusion (718) are respectively connected to the inner side of the break (716) and extend inward from the break (716), the other ends of the first protrusion (717) and the second protrusion (718) intersect and are connected, and a chamber (714) communicating with the break (716) is formed between the first protrusion (717) and the second protrusion (718); a first slit (713) is formed between one of the side portions (712) and the first protrusion (717), and a second slit (719) is formed between the other side portion (712) and the second protrusion (718); The bottom (720) located on both sides of the fracture (716) is provided with a plurality of air outlets (715), which are respectively connected to the first slit (713) and the second slit (719).

10. The arc extinguishing structure according to claim 9, characterized in that: The arc extinguishing chamber (7) further comprises at least one metal grid arc extinguishing chamber (72); the metal grid arc extinguishing chamber (72) comprises a plurality of metal grids parallel to each other; The metal grid arc extinguishing chamber (72) is placed overlappingly with the double-insulated narrow-slit arc extinguishing chamber (71).

11. The arc extinguishing structure according to any one of claims 8 to 10, characterized in that: The first magnetic conductive side plate (22) and the second magnetic conductive side plate (23) respectively extend to the outside of the arcing portion (11) and to the contact area between the moving contact (4) and the stationary contact (5).

12. A DC switch, characterized in that: The arc extinguishing structure in the DC switch adopts the arc extinguishing structure according to any one of claims 8 to 11.

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