Arc extinguishing device and circuit breaker
A dual arc extinguishing mechanism with angled components enhances arc extinguishment in circuit breakers, improving contact breaking capacity and performance by guiding the arc into both components for efficient extinguishment.
Patent Information
- Application Number
- CN202421609892.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-08
AI Technical Summary
The existing arc extinguishing device has weak arc extinguishing effect, which leads to a significant impact on the performance of the contact, which is not conducive to the improvement of the circuit breaker performance.
The dual arc extinguishing component design is adopted. By setting the first and second arc extinguishing components with an angle of 45°±25° or 135°±25°, combined with the arc-induced plate and bending part, the introduction and turning effects of the arc are enhanced, and the space below the dynamic contacts and static contacts are fully utilized to achieve a compact layout of the arc and efficient arc extinguishing.
The arc extinguishing effect is enhanced, the contact breaking ability is improved, and the arc can be effectively introduced and the arc extinguishing assembly is quickly extinguished, which improves the overall performance of the circuit breaker.
Smart Images
Figure CN223108820U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of low-voltage electrical appliances, and more particularly, to an arc extinguishing device and a circuit breaker. Background Art
[0002] At the moment when the circuit breaker breaks, due to the existence of the capacitance between the contacts, the insulation between the contacts will be broken down, and then an arc will be generated. Due to the shape and structure of the contacts, the arc will quickly spread to the area outside the arc, which has an adverse effect on the contacts. Therefore, an arc extinguishing device is provided in the circuit breaker to limit the arc and help the arc extinguish, aiming to prevent the arc from burning the contacts and restricting the space for the arc to expand. The existing arc extinguishing devices have relatively weak arc extinguishing effects, which greatly affect the performance of the contacts and are not conducive to improving the performance of the circuit breaker. Summary of the Utility Model
[0003] The purpose of this application is to provide an arc extinguishing device and a circuit breaker to enhance the arc extinguishing effect and improve the product performance in view of the deficiencies in the above-mentioned prior art.
[0004] To achieve the above purpose, the technical solutions adopted in the embodiments of this application are as follows:
[0005] On the one hand, an embodiment of this application provides an arc extinguishing device, including: a first arc extinguishing component and a second arc extinguishing component. The second arc extinguishing component is arranged at an interval on one side of the first arc extinguishing component along the connection direction of the moving contact and the static contact, and an included angle is formed between the first arc extinguishing component and the second arc extinguishing component.
[0006] Optionally, the included angle is 45° ± 25°, or the included angle is 135° ± 25°.
[0007] Optionally, in the plane of the opening and closing direction, the first arc extinguishing component is arranged in parallel, and the second arc extinguishing component is arranged obliquely; or, the first arc extinguishing component is arranged obliquely, and the second arc extinguishing component is arranged in parallel.
[0008] Optionally, a first arc guiding piece is further arranged between the first arc extinguishing component and the moving contact. The first arc guiding piece has a first arc guiding area adapted to the first arc extinguishing component and a second arc guiding area adapted to the moving contact.
[0009] Optionally, the first arc guiding area and the second arc guiding area are connected by a first bending part, and the first bending part is bent towards the direction of the first arc extinguishing component.
[0010] Optionally, a second arc guiding piece is arranged between the first arc extinguishing component and the second arc extinguishing component. The second arc guiding piece has a third arc guiding area adapted to the first arc extinguishing component and a fourth arc guiding area adapted to the second arc extinguishing component.
[0011] Optionally, the third arcing area and the fourth arcing area are connected by a second bending part, and the second bending part is bent towards the second arc extinguishing component.
[0012] Optionally, the first arc extinguishing component is located between the first arcing area and the third arcing area.
[0013] Optionally, the second arc extinguishing component is located between the arcing area of the static contact and the fourth arcing area.
[0014] On the other hand, an embodiment of the present application provides a circuit breaker, including: a contact system, and the above arc extinguishing device located on one side of the contact system.
[0015] The beneficial effects of the present application include:
[0016] The present application provides an arc extinguishing device and a circuit breaker. By setting a double arc extinguishing component, the arc can be lengthened; and through the setting of the included angle between the first arc extinguishing component and the second arc extinguishing component, the arc extinguishing effect is enhanced, and the breaking capacity of the contact is improved; moreover, the space below the moving contact and the static contact is fully utilized, so that the arc is easily introduced into the two groups of arc extinguishing components, and the space layout can also be made compact. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.
[0018] Figure 1 One of the matching structure diagrams of an arc extinguishing device and a contact system provided by an embodiment of the present application;
[0019] Figure 2 Another matching structure diagram of an arc extinguishing device and a contact system provided by an embodiment of the present application.
[0020] Icons: 10 - arc extinguishing device; 11 - first arc extinguishing component; 110 - first arc extinguishing grid; 12 - second arc extinguishing component; 120 - second arc extinguishing grid; 13 - first arcing piece; 131 - first arcing area; 132 - second arcing area; 133 - first bending part; 14 - second arcing piece; 141 - third arcing area; 142 - fourth arcing area; 143 - second bending part; 20 - contact system; 21 - moving contact; 22 - static contact; 220 - arcing area; S - plane in the closing and opening direction; a - included angle. Detailed Embodiments
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will, with reference to the accompanying drawings in the embodiments of this application, clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application that are usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. It should be noted that, without conflict, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.
[0023] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0024] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of this application are customarily placed during use. It is only for the convenience of describing this 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 should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.
[0025] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0026] In the description of this application, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", and "connected" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.
[0027] On the one hand of the embodiments of this application, with reference to Figure 1 、Figure 2 As shown in the figure, an arc extinguishing device 10 is provided, which includes a first arc extinguishing component 11 and a second arc extinguishing component 12. The second arc extinguishing component 12 is arranged at one side of the first arc extinguishing component 11 at intervals along the connecting line direction of the moving contact 21 and the static contact 22, and an included angle a is formed between the first arc extinguishing component 11 and the second arc extinguishing component 12.
[0028] Among them, the first arc extinguishing component 11 includes a plurality of parallel and spaced first arc extinguishing grid plates 110, and the second arc extinguishing component 12 includes a plurality of parallel and spaced second arc extinguishing grid plates 120. The arc is attracted by the arc extinguishing grid plates to introduce the arc into the arc extinguishing component.
[0029] Exemplarily, Figure 1 in the first arc extinguishing component 11 is located below the contact or separation area of the moving contact 21 and the static contact 22, and the second arc extinguishing component 12 is arranged below the arc leading area 220 of the static contact 22. The second arc extinguishing component 12 is located at one side of the first arc extinguishing component 11 and is spaced from each other.
[0030] In this way, when the moving contact 21 and the static contact 22 are disconnected to generate an arc, the arc is easily introduced into the first arc extinguishing component 11 and the second arc extinguishing component 12 to achieve arc extinguishing.
[0031] After the arc is introduced, when it enters from one arc extinguishing component into the other arc extinguishing component, due to the included angle a between the first arc extinguishing component 11 and the second arc extinguishing component 12, the arc will turn along the direction of the included angle a of the two sets of arc extinguishing components, avoiding the DC back-blow problem when the arc moves linearly, which is beneficial to enhancing the arc extinguishing effect.
[0032] In this application, by setting a double arc extinguishing component, the arc can be lengthened; and then through the setting of the included angle a between the first arc extinguishing component 11 and the second arc extinguishing component 12, the arc extinguishing effect is enhanced, and the breaking capacity of the contact is improved; moreover, the space below the moving contact 21 and the static contact 22 is fully utilized, so that the arc is easily introduced into the two sets of arc extinguishing components, and the space layout can also be made compact.
[0033] Specifically, when the included angle a is formed between the first arc extinguishing component 11 and the second arc extinguishing component 12, the included angle a is 45° ± 25°, or the included angle a is 135° ± 25°.
[0034] In one embodiment, as Figure 1 shown, the included angle a between the first arc extinguishing component 11 and the second arc extinguishing component 12 is an obtuse angle, and they can be arranged at an obtuse angle, and the range of the obtuse angle is between 135° ± 25°.
[0035] In another embodiment, as Figure 2As shown, the included angle α between the first arc extinguishing component 11 and the second arc extinguishing component 12 is an acute angle, and they can be arranged at an acute angle, and the range of the acute angle is between 45°±25°.
[0036] When the first arc extinguishing component 11 and the second arc extinguishing component 12 are arranged at an acute angle or an obtuse angle, when the arc is introduced from one arc extinguishing component to another arc extinguishing component, the turning amplitude of the movement path of the arc is relatively large, further enhancing the arc extinguishing effect.
[0037] In addition, when the included angle α is arranged between the first arc extinguishing component 11 and the second arc extinguishing component 12, both of them can be inclined relative to the plane S in the opening and closing direction, as long as the included angle α between them meets the above requirements. The opening and closing direction is the movement plane of the moving contact 21. Figure 1 The direction into the paper is shown in the figure.
[0038] Furthermore, in the example of the present application, in the plane S in the opening and closing direction, one of the arc extinguishing components is arranged in parallel, and the other arc extinguishing component is arranged obliquely.
[0039] For example Figure 1 in the first arc extinguishing component 11 is arranged obliquely, and the second arc extinguishing component 12 is arranged in parallel; it can also be as Figure 2 shown, the first arc extinguishing component 11 is arranged in parallel, while the second arc extinguishing component 12 is arranged obliquely; no matter which setting method, the included angle α between them still meets the setting angle.
[0040] In order to realize the introduction of the arc, a first arc guiding piece 13 is further arranged between the first arc extinguishing component 11 and the moving contact 21. The first arc guiding piece 13 has a first arc guiding area 131 adapted to the first arc extinguishing component 11 and a second arc guiding area 132 adapted to the moving contact 21.
[0041] Take Figure 1 as an example, the moving contact 21 is arranged obliquely in the plane S in the opening and closing direction, the first arc extinguishing component 11 is arranged obliquely, and the first arc guiding area 131 and the second arc guiding area 132 of the first arc guiding piece 13 are respectively adapted and arranged obliquely.
[0042] Moreover, the first arc guiding area 131 and the second arc guiding area 132 are connected by a first bending part 133, and the first bending part 133 is bent towards the direction of the first arc extinguishing component 11.
[0043] When the moving contact 21 and the static contact 22 are separated to generate an arc, the arc is sequentially introduced into the first arc extinguishing component 11 along the second arc guiding area 132, the first bending part 133, and the first arc guiding area 131 for arc extinguishing; the setting of the first bending part 133 makes the arc more easily introduced into the first arc extinguishing component 11 along the bending direction. Exemplarily, the first bending part 133 of the present application forms a semi-circular arc bending.
[0044] Similarly, a second arc ignition piece 14 is provided between the first arc extinguishing component 11 and the second arc extinguishing component 12. The second arc ignition piece 14 has a third arc ignition area 141 adapted to the first arc extinguishing component 11 and a fourth arc ignition area 142 adapted to the second arc extinguishing component 12.
[0045] After the electric arc is introduced into the first arc extinguishing component 11, it is also introduced into the second arc extinguishing component 12 through the second arc ignition piece 14, which can enable the electric arc that has not been extinguished in the first arc extinguishing component 11 to continue to be extinguished in the second arc extinguishing component 12, enhancing the overall arc extinguishing effect.
[0046] The third arc ignition area 141 of the second arc ignition piece 14 is arranged obliquely to be adapted to the inclined first arc extinguishing component 11, and the fourth arc ignition area 142 is arranged parallel to be adapted to the second arc extinguishing component 12.
[0047] The second bending part 143 connecting the third arc ignition area 141 and the fourth arc ignition area 142 is bent toward the second arc extinguishing component 12 with a small bending degree, which can also play a role in smoothly introducing the electric arc into the second arc extinguishing component 12.
[0048] Furthermore, the first arc extinguishing component 11 is located between the first arc ignition area 131 and the third arc ignition area 141.
[0049] The first arc extinguishing component 11 is clamped between the first arc ignition area 131 and the third arc ignition area 141, which can prompt the electric arc to quickly enter the first arc extinguishing component 11 through the first arc ignition area 131 along the direction of the moving contact 21, and then quickly enter the second arc extinguishing component 12 through the third arc ignition area 141, realizing rapid arc extinguishing.
[0050] The second arc extinguishing component 12 is located between the arc ignition area 220 of the static contact 22 and the fourth arc ignition area 142.
[0051] After the electric arc is generated, part of the electric arc can sequentially enter the first arc extinguishing component 11 and the second arc extinguishing component 12 along the direction of the moving contact 21, and another part of the electric arc can also directly enter the second arc extinguishing component 12 along the direction of the static contact 22. The static contact 22 is provided with an arc ignition area 220, and the electric arc is introduced into the second arc extinguishing component 12 through the arc ignition area 220 for arc extinguishing.
[0052] On the other hand, Figure 2 In the example of, since the first arc extinguishing component 11 is arranged vertically and parallelly, while the second arc extinguishing component 12 is arranged obliquely to be adapted to the static contact 22, accordingly, the first arc ignition piece 13 and the second arc ignition piece 14 are also arranged adaptively. The specific arc extinguishing process can refer to Figure 1 , which will not be elaborated here.
[0053] On this basis, an embodiment of the present application further discloses a circuit breaker, which includes a contact system 20 and the arc extinguishing device 10 as described in any one of the above, and the arc extinguishing device 10 is located on one side of the contact system 20 in the plane S along the opening and closing direction.
[0054] In the present application Figure 1 , Figure 2 , the arc extinguishing device 10 is located below the contact system 20 to extinguish the arc generated by the breaking of the moving contact 21 and the static contact 22 through the double arc extinguishing components, enhance the arc extinguishing effect, and improve the product performance.
[0055] This circuit breaker has the same structure and beneficial effects as the arc extinguishing device 10 in the foregoing embodiment. The structure and beneficial effects of the arc extinguishing device 10 have been described in detail in the foregoing embodiment and will not be elaborated herein.
[0056] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. An arc extinguishing device, characterized in that, It includes a first arc extinguishing component (11) and a second arc extinguishing component (12). The second arc extinguishing component (12) is arranged at one side of the first arc extinguishing component (11) at intervals along the connection line direction of the moving contact (21) and the static contact (22), and an included angle (a) is formed between the first arc extinguishing component (11) and the second arc extinguishing component (12). The included angle (a) is 45° ± 25°, or the included angle (a) is 135° ± 25°.
2. The arc extinguishing device according to claim 1, characterized in that, In the plane (S) of the opening and closing direction, the first arc extinguishing component (11) is arranged in parallel, and the second arc extinguishing component (12) is arranged obliquely; or, the first arc extinguishing component (11) is arranged obliquely, and the second arc extinguishing component (12) is arranged in parallel.
3. The arc extinguishing device according to any one of claims 1 to 2, characterized in that, A first arcing piece (13) is further arranged between the first arc extinguishing component (11) and the moving contact (21). The first arcing piece (13) has a first arcing area (131) adapted to the first arc extinguishing component (11) and a second arcing area (132) adapted to the moving contact (21).
4. The arc extinguishing device according to claim 3, characterized in that, The first arcing area (131) and the second arcing area (132) are connected by a first bending part (133), and the first bending part (133) is bent towards the first arc extinguishing component (11).
5. The arc extinguishing device according to claim 4, characterized in that, A second arcing piece (14) is arranged between the first arc extinguishing component (11) and the second arc extinguishing component (12). The second arcing piece (14) has a third arcing area (141) adapted to the first arc extinguishing component (11) and a fourth arcing area (142) adapted to the second arc extinguishing component (12).
6. The arc extinguishing device according to claim 5, characterized in that, The third arcing area (141) and the fourth arcing area (142) are connected by a second bending part (143), and the second bending part (143) is bent towards the second arc extinguishing component (12).
7. The arc extinguishing device according to claim 5 or 6, characterized in that The first arc extinguishing component (11) is located between the first arcing area (131) and the third arcing area (141).
8. The arc extinguishing device according to claim 5 or 6, characterized in that The second arc extinguishing component (12) is located between the arcing area (220) of the static contact (22) and the fourth arcing area (142).
9. A circuit breaker, characterized in that, It includes a contact system (20) and the arc extinguishing device (10) according to any one of claims 1 to 8 located on one side of the contact system (20).