Arc extinguishing device and circuit breaker

Abstract

The application provides an arc extinguishing device and a circuit breaker, and relates to the technical field of electrical equipment. The arc extinguishing device comprises a gas generating assembly, an impeller assembly, and a first mounting piece and a second mounting piece which are oppositely arranged along a first direction. An installation space is formed between the first mounting piece and the second mounting piece, and an arc inlet is arranged on one side of the installation space. The gas generating assembly is arranged on one side of the installation space close to the arc inlet, and is used for generating cooling gas based on the action of an electric arc. The impeller assembly is arranged on the gas generating assembly, can rotate based on the cooling gas, and generates air flow from one side of the installation space to the other side. In this way, the gas generating assembly can facilitate the migration of the electric arc into the installation space, and can lengthen and cool the electric arc. The impeller assembly can rotate based on the cooling gas generated by the gas generating assembly, and can help to further drive the electric arc into the installation space to extinguish the arc, so that the extinguishing effect of the electric arc can be improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to an arc extinguishing device and a circuit breaker. Background Technology

[0002] A circuit breaker, as an electrical appliance that can connect or disconnect a circuit, typically includes moving contacts and stationary contacts. The moving contacts can be connected or separated from the stationary contacts based on principles such as electromagnetic or mechanical transmission, thereby controlling the connection or disconnection of the circuit.

[0003] When a circuit breaker is operating, an electric arc can easily form between the moving and stationary contacts. This arc has adverse effects on the moving and stationary contacts, as well as other insulation materials within the circuit breaker. To reduce the damage caused by the arc, circuit breakers are generally equipped with arc-extinguishing devices. When an arc is generated, the arc-extinguishing device can accelerate its extinction, thus protecting the circuit breaker.

[0004] In related technologies, the arc extinguishing device is not set up properly, resulting in a poor arc extinguishing effect. Utility Model Content

[0005] This application provides an arc-extinguishing device and a circuit breaker, which can improve the arc-extinguishing effect of the arc-extinguishing device.

[0006] In a first aspect, this application provides an arc-extinguishing device, including a gas-generating assembly, an impeller assembly, and a first mounting member and a second mounting member disposed opposite to each other along a first direction. An installation space is formed between the first mounting member and the second mounting member, and an arc inlet is provided on one side of the installation space. The gas-generating assembly is disposed in the installation space near the arc inlet and is used to generate cooling gas based on the action of an electric arc. The impeller assembly is disposed in the gas-generating assembly, and can rotate based on the cooling gas, generating an airflow from one side of the installation space to the other.

[0007] In this embodiment, the gas-generating component facilitates the migration of the electric arc into the installation space, while simultaneously elongating and cooling the arc. The impeller assembly rotates based on the cooling gas generated by the gas-generating component, which helps to further drive the arc into the installation space for arc extinguishing, thereby improving the arc extinguishing effect.

[0008] Optionally, the gas-generating assembly includes a first gas-generating block and a second gas-generating block, with the first gas-generating block mounted on a first mounting component and the second gas-generating block mounted on a second mounting component.

[0009] The first gas-generating block has a first mounting hole that penetrates the first gas-generating block in a first direction, and the impeller assembly is disposed in the first mounting hole. And / or, the second mounting member has a second mounting hole that penetrates the second gas-generating block in a first direction, and the impeller assembly is disposed in the second mounting hole.

[0010] This allows the cooling gas generated by the gas-generating components to be more symmetrical, which helps to improve the arc extinguishing effect, thereby increasing the rate at which the arc enters the arc extinguishing device and enhancing the arc extinguishing effect.

[0011] Optionally, the impeller assembly includes a shaft and blades, with the blades connected to the shaft and inclined relative to the shaft's axis. When the impeller assembly is installed in the first mounting hole, the shaft is rotatably installed in the first mounting hole; when the impeller assembly is installed in the second mounting hole, the shaft is rotatably installed in the second mounting hole. The blades can drive the shaft to rotate based on the cooling gas.

[0012] In this way, when the first and / or second gas-generating blocks produce cooling gas, the cooling gas can act on the blades, which in turn can drive the shaft to rotate. During the rotation of the blades, the blades can convert mechanical energy into the kinetic energy of the gas, which can extract the arc located outside the arc inlet, making it easier for the arc to enter the arc-extinguishing device for extinguishing.

[0013] Optionally, the arc-extinguishing device also has a second direction and a third direction, with the first, second, and third directions intersecting each other. Multiple arc-blocking plates distributed along the second direction are also provided in the installation space, with the arc-blocking plates and the gas-generating assembly distributed along the third direction. In the second direction, each arc-blocking plate has opposing first and second surfaces. The first surface has a boss, and the second surface has a groove. In two adjacent arc-blocking plates, the first surface of one arc-blocking plate faces the second surface of the other. Both the boss and the groove are inclined relative to the third direction.

[0014] With the above setup, after the electric arc enters the arc extinguishing device through the arc inlet, the gas generating component can first cool the electric arc. Then, as the electric arc migrates, multiple arc-blocking plates can cut the electric arc into multiple short arcs to increase the resistance of the electric arc, limit the current of the electric arc, and extinguish the electric arc.

[0015] Optionally, the arc-extinguishing device also includes flame-extinguishing plates, which are disposed on the side of the arc-isolating plate away from the gas-generating component. Multiple flame-extinguishing plates are arranged along the second direction. The planes containing the flame-extinguishing plates intersect the second direction and a third direction.

[0016] In this way, when the arc-blocking plate fails to extinguish all the arcs, resulting in arcs passing through the arc-blocking plate, the flame-extinguishing plate can process the unextinguished arcs, absorb the residual arc energy, and reduce the possibility of arcs or flames being ejected and damaging other components in the circuit breaker.

[0017] Optionally, on the side away from the gas-generating component, the first mounting member is connected to the second mounting member. The first mounting member has a first vent hole on the side facing the second mounting member, and / or the second mounting member has a second vent hole on the side facing the first mounting member.

[0018] In this way, the high-temperature and high-pressure gas after the arc is extinguished can be quickly released through the first vent and / or the second vent, reducing the possibility of the arc extinguishing device bursting.

[0019] Optionally, the arc extinguishing device also includes an arc-initiating plate, which is disposed on one side of the plurality of arc-blocking plates in the second direction, and the side of the arc-initiating plate facing the gas-generating component is opposite to a portion of the plurality of arc-blocking plates.

[0020] In this way, the side of the arc-initiating plate facing the gas-generating component guides the electric arc passing through the arc inlet, allowing the electric arc to migrate along the arc-initiating plate and facilitating the uniform entry of the electric arc into the space between the multiple arc-isolating plates distributed along the second direction.

[0021] Optionally, a notch is provided on the side of the arc initiation plate that is away from the arc inlet.

[0022] With the above configuration, the notch on the arc-starting plate can provide local expansion space, allowing the residual high-temperature gas generated when the arc-quenching plate extinguishes the arc to be depressurized at the notch before being discharged, thus reducing the possibility of damage to the first and second mounting components.

[0023] Optionally, the first mounting component has a first snap-fit ​​groove on the side facing the second mounting component, and the second mounting component has a second snap-fit ​​groove on the side facing the first mounting component. The arc-starting piece snaps into the first snap-fit ​​groove and the second snap-fit ​​groove.

[0024] This makes the installation of the arc-starting plate simpler and more reliable.

[0025] Secondly, this application provides a circuit breaker including any of the arc-extinguishing devices described in the first aspect above.

[0026] The beneficial effects of the circuit breakers provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an arc-extinguishing device according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram showing the connection of a first mounting component and a second mounting component according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of removing the second mounting component of an arc-extinguishing device according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of a first gas-producing block according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of an impeller assembly according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of two adjacent arc-blocking plates in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of a first mounting component according to an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures: 100: Arc extinguishing device; 101: Installation space; 102: Arc inlet; 10: First mounting component; 11: First side plate; 12: First mounting plate; 13: First exhaust hole; 14: First snap-fit ​​groove; 15: Snap-fit ​​groove; 20: Second mounting component; 21: Second side plate; 22: Second mounting plate; 23: Second exhaust hole; 30: Gas generating assembly; 31: First gas generating block; 311: First mounting hole; 32: Second gas generating block; 321: Second mounting hole; 40: Impeller assembly; 41: Rotating shaft; 42: Blade; 50: Arc blocking plate; 51: First surface; 511: Boss; 52: Second surface; 521: Groove; 60: Flame extinguishing plate; 70: Arc ignition plate; 71: Notch; X: First direction; Y: Second direction; Z: Third direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0037] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0039] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application 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 application.

[0040] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0041] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection fixed by spacers, such as a connection fixed by screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0044] Exemplary, embodiments of this application provide a circuit breaker, the circuit breaker including as follows Figure 1 The arc-extinguishing device 100 shown.

[0045] During the circuit breaker tripping process, the moving and stationary contacts can separate and interrupt the current in the circuit. When the moving and stationary contacts separate, the particles between them are broken down by voltage, thus forming an electric arc. In a circuit breaker equipped with the aforementioned arc-extinguishing device 100, the arc can be extinguished by the arc-extinguishing device 100, improving the arc extinguishing effect, reducing arc energy and duration, thereby avoiding the occurrence of safety hazards.

[0046] The arc-extinguishing device 100 provided in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0047] Reference Figure 1 and Figure 2 As shown, this application provides an arc-extinguishing device 100, including a gas-generating assembly 30, an impeller assembly 40, and a first mounting member 10 and a second mounting member 20 disposed opposite each other along a first direction X. An installation space 101 is formed between the first mounting member 10 and the second mounting member 20, and an arc inlet 102 is provided on one side of the installation space 101. The gas-generating assembly 30 is disposed in the installation space 101 near the arc inlet 102 and is used to generate cooling gas based on the action of an electric arc. The impeller assembly 40 is disposed on the gas-generating assembly 30, can rotate based on the cooling gas, and generates an airflow from one side of the installation space 101 to the other.

[0048] In this embodiment of the application, since an installation space 101 is formed between the first mounting member 10 and the second mounting member 20, the first mounting member 10 and the second mounting member 20 can serve as the housing of the arc extinguishing device 100, providing space and a mounting base for the gas generating assembly 30 and the impeller assembly 40.

[0049] The gas generating component 30 can generate cooling gas based on the action of an electric arc. That is, when the arc extinguishing device 100 is installed in the circuit breaker and an electric arc is generated due to the circuit breaker opening, the electric arc can migrate to the side where the arc extinguishing device 100 is located. Since the gas generating component 30 is located close to the arc inlet 102, it can generate cooling gas based on the electric arc in the initial stage of arc generation.

[0050] In this way, on the one hand, the generation of cooling gas facilitates the migration of the electric arc from the arc inlet 102 to the other side of the installation space 101, which helps the arc enter the arc extinguishing device 100 for extinguishing. On the other hand, the cooling gas can also lengthen and cool the arc, while increasing the arc's resistance to accelerate its extinguishing.

[0051] Furthermore, the arc-extinguishing device 100 proposed in this application also includes an impeller assembly 40. Since the impeller assembly 40 is disposed on the gas-generating assembly 30, when the gas-generating assembly 30 generates cooling gas based on the action of the electric arc, the cooling gas acts on the impeller assembly 40, causing the impeller assembly 40 to rotate, thereby generating an airflow from one side of the mounting space 101 to the other. In this way, the airflow generated by the rotation of the impeller assembly 40 can also facilitate the migration of the electric arc from the arc inlet 102 to the other side of the mounting space 101, which helps to extinguish the electric arc.

[0052] In summary, in this embodiment, the gas-generating component 30 in the arc-extinguishing device 100 facilitates the migration of the electric arc into the installation space 101, while simultaneously elongating and cooling the arc. The impeller component 40, designed to rotate based on the cooling gas generated by the gas-generating component 30, further drives the arc from one side of the arc inlet 102 to the other side of the installation space 101. This facilitates the arc's entry into the installation space 101 for extinguishing, improving the arc-extinguishing effect and reducing the possibility of persistent arc presence or slow entry into the arc-extinguishing device 100, which could lead to contact erosion or even safety hazards.

[0053] In some embodiments, such as Figure 1 and Figure 3As shown, the gas generating assembly 30 may include a first gas generating block 31 and a second gas generating block 32. The first gas generating block 31 is mounted on the first mounting member 10, and the second gas generating block 32 is mounted on the second mounting member 20. Thus, when an electric arc is generated, both the first gas generating block 31 and the second gas generating block 32 can generate cooling gas based on the action of the electric arc. This allows for symmetrical cooling gas flow and the formation of a counter-flow, which can instantly narrow and pre-cool the arc column, and also helps to improve the arc extinguishing effect, thereby shortening the arcing time.

[0054] Furthermore, the arrangement of the first gas-generating block 31 and the second gas-generating block 32 allows them to occupy more space and form a narrow slit on one side of the arc inlet 102. This, on the one hand, increases the arc velocity to a certain extent, facilitating the arc's entry into the arc-extinguishing device 100 for extinguishing. On the other hand, based on the principle of current limiting in the narrow slit, the arc can be rapidly lengthened, thinned, and cooled, causing a sharp increase in arc resistance, thereby raising the arc voltage in advance and facilitating the extinguishing of the arc by the arc-extinguishing device 100.

[0055] In this embodiment, the impeller assembly 40 is specifically disposed on the first gas-generating block 31, or the second gas-generating block 32, or both the first gas-generating block 31 and the second gas-generating block 32. This description uses the example of the impeller assembly 40 being disposed on both the first gas-generating block 31 and the second gas-generating block 32. For cases where the impeller assembly 40 is disposed on either the first gas-generating block 31 or the second gas-generating block 32, please refer to the corresponding descriptions; these will not be repeated here.

[0056] like Figure 1 , Figure 3 and Figure 4 As shown, the first gas-generating block 31 is provided with a first mounting hole 311, which penetrates the first gas-generating block 31 in the first direction X, and the impeller assembly 40 is disposed in the first mounting hole 311. The second mounting member 20 is provided with a second mounting hole 321, which penetrates the second gas-generating block 32 in the first direction X, and the impeller assembly 40 is disposed in the second mounting hole 321.

[0057] That is, the first mounting hole 311 on the first gas-generating block 31 and the second mounting hole 321 on the second gas-generating block 32 can provide mounting space 101 for the impeller assembly 40. At this time, there can be multiple impeller assemblies 40, some of which can be set in the first mounting hole 311 and others can be set in the second mounting hole 321.

[0058] In this way, when the arc extinguishing device 100 is installed in the circuit breaker to extinguish the electric arc, airflow can be generated on both the side of the first gas generating block 31 and the side of the second gas generating block 32, which is conducive to the electric arc entering the interior of the arc extinguishing device 100 through the arc inlet 102, thereby improving the arc extinguishing effect of the arc extinguishing device 100.

[0059] It should be noted that, in order to increase the airflow generated by the impeller assembly 40 and thus improve the rate at which the electric arc enters the arc-extinguishing device 100, the number of first mounting holes 311 on the first gas-generating block 31 can be multiple, thereby allowing for multiple impeller assemblies 40 mounted on the first gas-generating block 31. Similarly, multiple impeller assemblies 40 can also be mounted on the second gas-generating block 32, such as... Figure 2 and Figure 3 As shown.

[0060] It is understood that the number of impeller assemblies 40 installed on the first gas-generating block 31 can be 2, 3, or 4, etc., and the number of impeller assemblies 40 installed on the second gas-generating block 32 can also be 2, 3, or 4, etc. Of course, the number of impeller assemblies 40 installed on the first gas-generating block 31 and the number of impeller assemblies 40 installed on the second gas-generating block 32 can also be 1. This application does not specifically limit this; the number can be set according to the specifications of the circuit breaker, such as its rated voltage, rated short-circuit breaking current, and arc energy.

[0061] It should also be noted that, in the embodiments of this application, the first gas-generating block 31 and the second gas-generating block 32 can be made of materials capable of decomposing to produce cooling gases, such as polyamide (PA), polyformaldehyde (POM), or polymethyl methacrylate (PMMA), etc. The first gas-generating block 31 and the second gas-generating block 32 made of these materials can generate a large amount of cooling gas under the action of the electric arc, thereby elongating and cooling the electric arc and improving the arc-extinguishing effect of the arc-extinguishing device 100.

[0062] In some embodiments, such as Figure 4 and Figure 5 As shown, the impeller assembly 40 may include a shaft 41 and blades 42. The blades 42 are connected to the shaft 41 and are inclined relative to the axis of the shaft 41. When the impeller assembly 40 is disposed in the first mounting hole 311, the shaft 41 can be rotatably disposed in the first mounting hole 311. When the impeller assembly 40 is disposed in the second mounting hole 321, the shaft 41 can be rotatably disposed in the second mounting hole 321.

[0063] Thus, when the first gas-generating block 31 and / or the second gas-generating block 32 generate cooling gas, the cooling gas can act on the blades 42, thereby driving the rotating shaft 41 to rotate. During the rotation of the blades 42, a pressure difference is generated in the axial direction of the rotating shaft 41, thereby converting mechanical energy into the kinetic energy of the gas, which extracts the arc located outside the arc inlet 102, facilitating the arc to enter the arc-extinguishing device 100 for extinguishing.

[0064] In this application, the driving force of the impeller assembly 40 comes from the flow of cooling gas generated by the first gas generating block 31 and / or the second gas generating block 32, which can reduce the increase in parts and cost caused by additional components for driving the impeller assembly 40.

[0065] It should be noted that in the impeller assembly 40, the blade 42 is inclined relative to the axis of the rotating shaft 41. This allows the reference plane (chordal plane) of the blade 42 to have an angle with the rotation plane of the impeller assembly 40. Thus, the blade 42 can do work on the gas during rotation, generating a continuous axial suction force, which facilitates the gas (with electric arc) on the moving and stationary contact sides to enter the arc extinguishing device 100.

[0066] In this embodiment, the blade 42 can be a planar structure, and the plane containing the blade 42 can have an angle with the axis of the rotating shaft 41, so that the impeller assembly 40 can generate a large axial suction force during rotation. Specifically, the angle between the plane containing the blade 42 and the axis of the rotating shaft 41 can be between 15° and 60°, for example, 15°, 25°, 40°, 50°, or 60°, etc. This embodiment does not specifically limit this.

[0067] It should also be noted that, in order to make the rotation of the impeller assembly 40 more stable and reduce kinetic energy loss, the planar blade 42 can be improved to make its surface smooth and continuous.

[0068] Furthermore, the blades 42 can be arranged in different ways. For example, in an impeller assembly 40, only one blade 42 may be connected to the shaft 41. Alternatively, multiple blades 42 may be connected to the shaft 41 to balance the radial force of the impeller assembly 40, reduce vibration, and lower the load on a single blade 42. For example, the impeller assembly 40 may include two or three blades 42 distributed along the circumferential direction of the shaft 41, etc. This application does not specifically limit this.

[0069] In the embodiments of this application, such as Figure 1 , Figure 3 and Figure 6As shown, the arc extinguishing device 100 also includes an arc-isolating plate 50, which can cooperate with the gas generating component 30 to extinguish the electric arc.

[0070] Specifically, the arc-extinguishing device 100 also has a second direction Y and a third direction Z. Multiple arc-blocking plates 50 distributed along the second direction Y are also provided in the installation space 101. The arc-blocking plates 50 and the gas-generating assembly 30 are distributed along the third direction Z. Therefore, after the electric arc enters the arc-extinguishing device 100 through the arc inlet 102, the gas-generating assembly 30 can first cool the electric arc. Then, as the electric arc migrates, the multiple arc-blocking plates 50 distributed along the second direction Y can cut the electric arc into multiple short arcs, thereby increasing the arc's resistance, limiting the arc's current, and extinguishing the arc.

[0071] In the embodiments of this application, such as Figure 1 and Figure 6 As shown, in the second direction Y, the arc-blocking plate 50 has a first surface 51 and a second surface 52 facing each other. The first surface 51 is provided with a boss 511, and the second surface 52 is provided with a groove 521. Thus, when an electric arc enters between two adjacent arc-blocking plates 50, it can first move along the third direction Z. When it reaches the position of the boss 511 or the groove 521, the arc can move along the edge of the boss 511 or the groove 521, changing the arc's migration path from a straight line to a broken line. This lengthens and thins the arc, increases the arc root voltage, significantly improves the arc extinguishing speed, and reduces the possibility of safety hazards caused by the presence of the arc.

[0072] In two adjacent arc-blocking plates 50, the first surface 51 of one arc-blocking plate 50 can be opposite to or away from the first surface 51 of the other arc-blocking plate 50. That is, two adjacent arc-blocking plates 50 are arranged in opposite directions, such that the boss 511 of one arc-blocking plate 50 is opposite to the boss 511 of the other arc-blocking plate 50, or the groove 521 of one arc-blocking plate 50 is opposite to the groove 521 of the other arc-blocking plate 50.

[0073] Since both the boss 511 and the groove 521 are inclined relative to the third direction Z, the opposing bosses 511 or the opposing grooves 521 in two adjacent arc-blocking plates 50 are staggered, forming a cross configuration. In this way, the electric arcs on both sides can move along different paths between two adjacent arc-blocking plates 50, which helps to enlarge and thin the electric arc.

[0074] It is understood that, in addition to the above-mentioned case where adjacent arc-blocking plates 50 are arranged in opposite directions, the arc-blocking plates 50 can also have other arrangement methods. For example, adjacent arc-blocking plates 50 can also be arranged in the same direction, that is, in two adjacent arc-blocking plates 50, the protrusion 511 of one arc-blocking plate 50 is opposite to the groove 521 of the other arc-blocking plate 50, etc. This application does not make specific limitations on this.

[0075] It should be noted that in this application, the first direction X, the second direction Y, and the third direction Z intersect each other, and the first direction X, the second direction Y, and the third direction Z can form a spatial coordinate system. The surface on the first mounting component 10 where the first gas-generating block 31 is located can be parallel to the plane containing the second direction Y and the third direction Z.

[0076] The second direction Y and the third direction Z form an angle. Specifically, the second direction Y and the third direction Z can be perpendicular to each other. This way, the first gas-generating block 31, the second gas-generating block 32, and the multiple arc-blocking plates 50 occupy less space in the first direction X, which is beneficial for the miniaturization of the arc-extinguishing device 100. Of course, the angle can also be other values, such as 76°, 80°, or 95°, etc.

[0077] The plane formed by the second direction Y and the third direction Z can also be perpendicular to the first direction X, making the components in the arc-extinguishing device 100 more compact. Of course, the angle between the plane formed by the second direction Y and the third direction Z and the first direction X can also have other values, such as 76°, 80° or 95°, etc.

[0078] In some embodiments, such as Figure 1 and Figure 3 As shown, the arc extinguishing device 100 may further include a flame extinguishing plate 60, which is disposed on the side of the arc-isolating plate 50 away from the gas-generating assembly 30. Multiple flame extinguishing plates 60 are arranged along the second direction Y. Thus, when the arc-isolating plate 50 fails to extinguish all the arc, resulting in an arc passing through the arc-isolating plate 50, the flame extinguishing plate 60 can process this unextinguished portion of the arc, absorbing residual arc energy and reducing the possibility of arc or flame ejection that could damage other components in the circuit breaker.

[0079] The plane containing the flame extinguishing plate 60 intersects the second direction Y and the third direction Z. That is, the flame extinguishing plate 60 is set at an angle. In this way, the projected area of ​​the flame extinguishing plate 60 in the third direction Z is larger, which can increase the effective interception area of ​​the flame extinguishing plate 60 against the electric arc, lengthen the cooling path of the electric arc, and improve the extinguishing efficiency of the electric arc.

[0080] In some embodiments, such as Figure 1 and Figure 2 As shown, on the side facing away from the gas generating assembly 30, the first mounting member 10 is connected to the second mounting member 20. The first mounting member 10 has a first vent 13 on the side facing the second mounting member 20, and / or the second mounting member 20 has a second vent 23 on the side facing the first mounting member 10. The first vent 13 and / or the second vent 23 can quickly release the high-temperature, high-pressure gas after the arc is extinguished, reducing the possibility of the arc extinguishing device 100 rupturing.

[0081] Specifically, such as Figure 1 and Figure 2 As shown, the first mounting component 10 may include a first side plate 11 and a first mounting plate 12 connected to each other, and the second mounting component 20 includes a second side plate 21 and a second mounting plate 22 connected to each other. The first mounting plate 12 and the second mounting plate 22 can abut against each other, so that the first side plate 11, the first mounting plate 12, the second mounting plate 22 and the second side plate 21 enclose and form an installation space 101.

[0082] The first vent 13 is located on the side of the first mounting plate 12 facing the second mounting plate 22, and the second vent 23 is located on the side of the second mounting plate 22 facing the first mounting plate 12.

[0083] With only the first vent 13 provided, the first vent 13 can cooperate with the second mounting plate 22 to release high-temperature and high-pressure gas. In this case, the gap between two adjacent flame extinguishing plates 60 can be opposite to the first vent 13. With only the second vent 23 provided, the second vent 23 can cooperate with the first mounting plate 12 to release high-temperature and high-pressure gas. In this case, the gap between two adjacent flame extinguishing plates 60 can be opposite to the second vent 23.

[0084] When both a first vent hole 13 and a second vent hole 23 are provided, the first vent hole 13 and the second vent hole 23 can be connected to form an air hole, and the gap between two adjacent flame extinguishing plates 60 is opposite to the air hole.

[0085] In some embodiments, such as Figure 1 and Figure 3 As shown, the arc extinguishing device 100 may further include an arc ignition plate 70, which is disposed on one side of the plurality of arc blocking plates 50 in the second direction Y, and the side of the arc ignition plate 70 facing the gas generating assembly 30 is opposite to a portion of the plurality of arc blocking plates 50.

[0086] In this way, the side of the arc-initiating plate 70 facing the gas-generating component 30 guides the electric arc passing through the arc inlet 102, allowing the electric arc to migrate along the arc-initiating plate 70. This facilitates the uniform entry of the electric arc into the multiple arc-isolating plates 50 distributed along the second direction Y, reducing the possibility that the electric arc is only in some of the arc-isolating plates 50, causing some arc-isolating plates 50 to be idle and affecting the extinguishing effect of the arc-extinguishing device 100 on the electric arc.

[0087] It should be noted that when the arc extinguishing device 100 is installed in the circuit breaker, the arc inlet 102 can be positioned facing the stationary contact, while the arc ignition plate 70 can be located on the side relatively far from the stationary contact. In this way, when an arc is generated, the arc ignition plate 70 can better guide the arc to the arc isolation plate 50, which is farther from the stationary contact, for cutting, reducing the possibility that the arc isolation plate 50, which is farther from the stationary contact, will be idle.

[0088] In some embodiments, such as Figure 1 and Figure 2 As shown, a notch 71 can be provided on the side of the arc inlet plate 70 that is away from the arc inlet 102.

[0089] With the above configuration, the notch 71 on the arc-starting plate 70 can provide local expansion space, so that the residual high-temperature gas generated when the arc-blocking plate 50 extinguishes the arc can be depressurized at the notch first, and then discharged through the first exhaust hole 13 and / or the second exhaust hole 23, thereby reducing the stress on the first mounting member 10 and the second mounting member 20, and thus reducing the possibility of damage to the first mounting member 10 and the second mounting member 20.

[0090] In some embodiments, such as Figures 1 to 3 ,as well as Figure 7 As shown, the first mounting member 10 has a first snap-fit ​​groove 14 on the side facing the second mounting member 20, and the second mounting member 20 has a second snap-fit ​​groove on the side facing the first mounting member 10. The arc-inducing piece 70 can snap into the first snap-fit ​​groove 14 and the second snap-fit ​​groove.

[0091] That is, the first mounting component 10 can position and install the arc-starting piece 70 through the first snap-fit ​​groove 14, and the second mounting component 20 can position and install the arc-starting piece 70 through the second snap-fit ​​groove. This makes the installation of the arc-starting piece 70 simpler and more reliable.

[0092] When the first mounting member 10 includes a first side plate 11 and a first mounting plate 12, and the second mounting member 20 includes a second side plate 21 and a second mounting plate 22, the first snap-fit ​​groove 14 can be provided on the surface of the first side plate 11 facing the second side plate 21, and the second snap-fit ​​groove can be provided on the surface of the second side plate 21 facing the first side plate 11.

[0093] It is understandable that, in addition to the arc-initiating plate 70, other structures, such as multiple arc-isolating plates 50 and multiple flame-extinguishing plates 60, can also be installed in a similar manner. For example, the first side plate 11 and the second side plate 21 are also provided with multiple slots 15 distributed along the second direction Y, and the multiple arc-isolating plates 50 are correspondingly embedded in the multiple slots 15, such as... Figure 3 and Figure 7 As shown. This application will not elaborate further.

[0094] To make the structure of this application clearer, the assembly process of the arc-extinguishing device is described below.

[0095] Step 1001: Install the impeller assembly to the first gas-generating block and the second gas-generating block.

[0096] Step 1002: The arc-initiating piece is embedded in the first snap-fit ​​groove to install it onto the first gas-generating block.

[0097] Step 1003: Install the flame extinguishing plate onto the first gas generating block.

[0098] Step 1004: Install the first gas-generating block with the impeller assembly onto the first mounting component.

[0099] Step 1005: Install the second gas-generating block with the impeller assembly onto the second mounting component.

[0100] Step 1006: Connect the first gas-generating block and the second gas-generating block, complete the closing of the cover, and obtain the arc-extinguishing device.

[0101] In step 104, the first gas-generating block can be installed on the first mounting component using rivets. In step 105, the second gas-generating block can be installed on the second mounting component using rivets. In step 106, the first and second gas-generating blocks can also be connected using rivets.

[0102] It can be understood that the connection between the first gas-generating block 31 and the first mounting component 10, the second gas-generating block 32 and the second mounting component 20, and the first mounting component 10 and the second mounting component 20 are not limited to the above-mentioned connection methods, but can also be connected by threaded components, etc. Each embodiment of this application does not make specific limitations in this regard.

[0103] In summary, in this embodiment, the gas generating component 30 and the impeller component 40 can work together to guide the electric arc into the installation space 101, which helps to improve the extinguishing effect of the electric arc and reduces the possibility that the electric arc may persist or enter the arc extinguishing device 100 slowly, leading to contact erosion or even safety hazards.

[0104] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An arc-extinguishing device, characterized in that, The arc-extinguishing device has a first direction, and the arc-extinguishing device includes: A first mounting component and a second mounting component are arranged opposite to each other along the first direction, and an installation space is formed between the first mounting component and the second mounting component. An arc inlet is provided on one side of the installation space. A gas generating component is disposed in the installation space on the side near the arc inlet, and is used to generate cooling gas based on the action of an electric arc; An impeller assembly, disposed in the gas-generating assembly, can rotate based on the cooling gas and generate an airflow from one side of the mounting space to the other.

2. The arc-extinguishing device according to claim 1, characterized in that, The gas generating assembly includes a first gas generating block and a second gas generating block, wherein the first gas generating block is installed on the first mounting component and the second gas generating block is installed on the second mounting component; The first gas-generating block is provided with a first mounting hole, which penetrates the first gas-generating block in the first direction, and the impeller assembly is disposed in the first mounting hole; And / or, the second mounting member is provided with a second mounting hole, the second mounting hole penetrating the second gas generating block in the first direction, and the impeller assembly is disposed in the second mounting hole.

3. The arc-extinguishing device according to claim 2, characterized in that, The impeller assembly includes a shaft and blades, the blades being connected to the shaft and the blades being inclined relative to the axis of the shaft; When the impeller assembly is disposed in the first mounting hole, the rotating shaft is rotatably disposed in the first mounting hole; when the impeller assembly is disposed in the second mounting hole, the rotating shaft is rotatably disposed in the second mounting hole. The blades can drive the shaft to rotate based on the cooling gas.

4. The arc-extinguishing device according to any one of claims 1-3, characterized in that, The arc-extinguishing device also has a second direction and a third direction, wherein the first direction, the second direction and the third direction intersect each other; The installation space is also provided with a plurality of arc-blocking plates distributed along the second direction, and the arc-blocking plates and the gas-generating components are distributed along the third direction; In the second direction, the arc-blocking sheet has a first surface and a second surface facing each other. The first surface is provided with a boss, and the second surface is provided with a groove. In two adjacent arc-blocking sheets, the first surface of one arc-blocking sheet faces the second surface of the other arc-blocking sheet. Both the boss and the groove are inclined relative to the third direction.

5. The arc-extinguishing device according to claim 4, characterized in that, The arc extinguishing device further includes a flame extinguishing plate, which is disposed on the side of the arc isolation plate away from the gas generating component; The number of flame extinguishing plates is multiple, and the multiple flame extinguishing plates are arranged along the second direction; The plane containing the flame extinguishing plate intersects the second direction and the third direction.

6. The arc-extinguishing device according to claim 5, characterized in that, On the side away from the gas-generating assembly, the first mounting member is connected to the second mounting member; The first mounting member has a first vent hole on the side facing the second mounting member, and / or the second mounting member has a second vent hole on the side facing the first mounting member.

7. The arc-extinguishing device according to claim 4, characterized in that, The arc extinguishing device further includes an arc-initiating plate, which is disposed on one side of the plurality of arc-blocking plates in the second direction, and the side of the arc-initiating plate facing the gas generating component is opposite to a portion of the plurality of arc-blocking plates.

8. The arc-extinguishing device according to claim 7, characterized in that, A notch is provided on the side of the arc inlet plate that is away from the arc inlet.

9. The arc-extinguishing device according to claim 7, characterized in that, The first mounting component has a first snap-fit ​​groove on the side facing the second mounting component, and the second mounting component has a second snap-fit ​​groove on the side facing the first mounting component. The arc-starting plate is engaged with the first engagement slot and the second engagement slot.

10. A circuit breaker, characterized in that, The circuit breaker includes the arc-extinguishing device according to any one of claims 1-9.

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