Arc extinguishing system

Abstract

An arc extinguishing system is characterized in that the arc extinguishing system comprises at least two arc extinguishing assemblies, and a permanent magnet assembly is arranged between the at least two arc extinguishing assemblies to form a whole. By rearranging and designing the mounting position of the permanent magnet and the position of the arc extinguish chamber, the electric arc is in the strongest magnetic field area of the permanent magnet, and the magnetic field force of the permanent magnet directly acts on the electric arc generated by breaking the disconnecting switch to the maximum extent, so that the electric arc can quickly enter the arc extinguish assembly to be extinguished by the arc extinguish grid plate. As the magnetic pole direction of the permanent magnet is designed to be perpendicular to the circular arc motion trail of the moving contact and parallel to the plane where the circular arc motion trail of the moving contact is located, the electric arc can fully enter one of the two arc extinguishing assemblies no matter whether the energization polarity of a product is positive or negative, the magnetic blow-out effect is improved, and then the breaking performance of the disconnecting switch is improved.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage electrical technology, specifically relating to an arc extinguishing system. Background Technology

[0002] As a switching device, a disconnecting switch has an insulation distance between its contacts that meets the specified requirements and a clear disconnection mark when it is in the open position; when it is in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time.

[0003] As product performance indicators improve, taking DC operating environments as an example, the rated operating voltage has increased to DC1500V, and the performance requirements for products are becoming increasingly higher. Existing disconnecting switches often use magnets to increase the magnetic blowing force, thereby accelerating the arc extinguishing speed and improving the disconnecting performance. However, in existing technologies, magnets are usually placed on both sides of the arc-extinguishing chamber with their polarities attracting each other. This arrangement of magnets will give the product polarity. Another method is to use a magnetization direction that is approximately parallel to the separation direction of the moving and stationary contacts, but this structure will still reduce the magnetic blowing effect of the magnets. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing disconnect switches where the arrangement of magnets not only causes polarity in the product but also results in poor magnetic blow-out effect. This invention provides an arc-extinguishing system that, through a redesign and rearrangement of the permanent magnet installation position and the arc-extinguishing chamber position, not only is polarity avoided in the product, but the magnetic blow-out effect is also improved, thereby enhancing the breaking performance of the disconnect switch.

[0005] Technical solution

[0006] To achieve the above-mentioned technical objectives, the present invention provides an arc extinguishing system, characterized in that it includes at least two arc extinguishing components, wherein a permanent magnet component is installed between the at least two arc extinguishing components to form a whole.

[0007] In one embodiment, a permanent magnet assembly is installed between two adjacent arc-extinguishing assemblies of the at least two arc-extinguishing assemblies.

[0008] In one embodiment, the at least two arc-extinguishing components are symmetrically arranged on both sides of the permanent magnet component b.

[0009] In one embodiment, each of the at least two arc-extinguishing components includes a plurality of arc-extinguishing grids, the two ends of which are mounted on a pair of side plates.

[0010] In one embodiment, the permanent magnet assembly includes a permanent magnet housed within the cavity of the permanent magnet mounting box.

[0011] In one embodiment, the permanent magnet mounting box has a limiting mounting protrusion on the side corresponding to at least two arc-extinguishing components. The limiting mounting protrusion locks the corresponding side plate of the at least two arc-extinguishing components so that the at least two arc-extinguishing components and the permanent magnet components form a whole.

[0012] In one embodiment, the at least two arc-extinguishing components and the permanent magnet component are integrally arranged on one side of the moving contact rotation trajectory in the contact module.

[0013] In one embodiment, the magnetic pole direction of the permanent magnet is perpendicular to the corresponding moving contact's trajectory and parallel to the plane containing the moving contact's trajectory. In another embodiment, a plurality of arc-extinguishing grid plates are arranged in a fan shape, with the center of the fan shape facing the rotation center of the moving contact 1.

[0014] In one embodiment, the shape of the permanent magnet matches the arrangement shape of the plurality of arc-quenching grids.

[0015] In one embodiment, the magnetic poles of the permanent magnet are arranged along the width direction of the permanent magnet.

[0016] Beneficial effects

[0017] This invention provides an arc-extinguishing system, characterized by comprising at least two arc-extinguishing components, with a permanent magnet component forming a whole between the at least two arc-extinguishing components. Through a redesign and rearrangement of the permanent magnet installation position and the arc-extinguishing chamber position, the arc is located in the region of strongest magnetic field of the permanent magnet. The magnetic force of the permanent magnet directly and maximally acts on the arc generated by the disconnection of the disconnecting switch, allowing the arc to quickly enter the arc-extinguishing component and be extinguished by the arc-extinguishing grid. Because the magnetic pole direction of the permanent magnet is designed to be perpendicular to and parallel to the plane of the moving contact's arc movement trajectory, regardless of the polarity of the conductive electrode, the arc can fully enter one of the two arc-extinguishing components, improving the magnetic blow-out effect and thus enhancing the disconnection performance of the disconnecting switch. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Appendix Figure 1 This is a schematic diagram of the arc extinguishing system installation in Embodiment 1 of the present invention.

[0020] Appendix Figure 2This is a three-dimensional schematic diagram of the arc extinguishing system in Embodiment 1 of the present invention.

[0021] Appendix Figure 3 This is a front view of the arc extinguishing system in Embodiment 1 of the present invention.

[0022] Appendix Figure 4 This is a top view of the arc extinguishing system in Embodiment 1 of the present invention.

[0023] Appendix Figure 5 This is an exploded view of the arc extinguishing system in Embodiment 1 of the present invention.

[0024] Appendix Figure 6a This is a schematic diagram of the magnetic field in Embodiment 1 of the present invention. Figure 1 .

[0025] Appendix Figure 6b This is a schematic diagram of the magnetic field in Embodiment 1 of the present invention. Figure 2 .

[0026] Appendix Figure 6c This is a schematic diagram of the magnetic field in Embodiment 1 of the present invention. Figure 3 .

[0027] Appendix Figure 6d This is a schematic diagram of the magnetic field in Embodiment 1 of the present invention. Figure 4 .

[0028] Appendix Figure 7 This is a schematic diagram of the arc extinguishing system installation in Embodiment 2 of the present invention.

[0029] Appendix Figure 8 This is a three-dimensional schematic diagram of the arc extinguishing system in embodiment 2 of the present invention.

[0030] Appendix Figure 9 This is a front view of the arc extinguishing system in embodiment 2 of the present invention.

[0031] Appendix Figure 10 This is a top view of the arc extinguishing system in embodiment 2 of the present invention.

[0032] Appendix Figure 11 This is an exploded view of the arc extinguishing system in embodiment 2 of the present invention. Detailed Implementation

[0033] 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.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0038] Example 1

[0039] An arc-extinguishing system includes at least two arc-extinguishing components a, a', with a permanent magnet component b positioned between the at least two arc-extinguishing components a, a' to form a single unit. In practice, multiple arc-extinguishing components a, a' may be stacked on one side of the permanent magnet component b.

[0040] In this embodiment, as shown in the appendix Figure 2As shown in Figures 3, 4, and 5, a permanent magnet assembly b is preferably installed between two adjacent arc-extinguishing components a, a'. To ensure that the interrupted arc can be magnetically blown into the at least two arc-extinguishing components a, a' as much as possible, the at least two arc-extinguishing components a, a' are symmetrically arranged on both sides of the permanent magnet assembly b. (See attached figure.) Figure 2 and 5 As shown, each of the at least two arc-extinguishing components a, a' includes a plurality of arc-extinguishing grid plates 101. The two ends of each arc-extinguishing grid plate 101 are mounted on a pair of side plates 102, 102', which are insulating components. The plurality of arc-extinguishing grid plates 101 are arranged in a fan shape. The length of the arc-extinguishing grid plate 101a in the middle portion of the fan-shaped plurality of arc-extinguishing grid plates 101 is not shorter than the length of the arc-extinguishing grid plates 101b on both sides. In this embodiment, the length of the arc-extinguishing grid plate 101a in the middle portion of the fan-shaped plurality of arc-extinguishing grid plates 101 is the same as the length of the arc-extinguishing grid plates 101b on both sides.

[0041] Specifically, in the arc extinguishing system, as shown in the attached... Figure 2 As shown in Figures 3 and 4, the side plates on opposite sides of the at least two arc-extinguishing components a, a' are mounted together with the corresponding side of the permanent magnet component b, thereby forming a single unit with the permanent magnet component b. The permanent magnet component b includes a permanent magnet b01, which is housed within the cavity of the permanent magnet mounting box b02. (See attached figure.) Figure 5 As shown, the permanent magnet mounting box b02 has limiting mounting protrusions b0202 and b0202' on its corresponding sides to at least two arc-extinguishing components a, a'. These limiting mounting protrusions b0202 and b0202' engage the corresponding side plates of the at least two arc-extinguishing components a, a'. The limiting mounting protrusion b0202 also has a clearance groove corresponding to the arc-extinguishing grid 101. Simultaneously, the arc-extinguishing grid 101 is attracted by the permanent magnet b01, making the at least two arc-extinguishing components a, a' and the permanent magnet assembly b a single unit. The permanent magnet mounting box b is an insulated mounting box. The permanent magnet mounting box b consists of a base box 201 and a cover 202, which are correspondingly fastened together to form the permanent magnet mounting box b as a whole. During installation, the integrated assembly consisting of the at least two arc-extinguishing components a, a' and the permanent magnet assembly b is placed into the contact module c.

[0042] As attached Figure 1 As shown, the at least two arc-extinguishing components a, a' and the permanent magnet component b form an integral arrangement on one side of the rotation trajectory of the moving contact c01 in the contact module c. The magnetic pole direction of the permanent magnet b01 is perpendicular to the corresponding movement trajectory of the moving contact c01 and parallel to the plane containing the movement trajectory of the moving contact c01. Specifically, as shown in the attached figure... Figure 5As shown, the magnetic poles of the permanent magnet b01 are arranged along its width. The magnetic pole directions N(S) to S(N) of the permanent magnet b01 are perpendicular to the trajectory of the moving contact c01 (i.e., the direction of movement of the moving contact c01 at each position is the tangent direction of its trajectory, and the magnetic pole directions N(S) to S(N) of the permanent magnet b01 are perpendicular to this tangent direction). A plurality of arc-extinguishing grid plates 101 are arranged in a fan shape, with the center of the fan facing the rotation center of the moving contact c01. The shape of the permanent magnet b01 matches the arrangement shape of the plurality of arc-extinguishing grid plates 101. At least two arc-extinguishing components a and a' are used, with a total of two.

[0043] This invention provides an arc-extinguishing system comprising at least two arc-extinguishing components a, a', wherein a permanent magnet component b is installed between the at least two arc-extinguishing components a, a' to form a whole. Through a redesign and rearrangement of the permanent magnet installation position and the arc-extinguishing chamber position, the arc is located in the region of strongest magnetic field of the permanent magnet. The magnetic force of the permanent magnet directly and maximizes its effect on the arc generated by the disconnection of the disconnecting switch, allowing the arc to quickly enter the arc-extinguishing component and be extinguished by the arc-extinguishing grid. Because the magnetic pole direction of the permanent magnet b01 is designed to be perpendicular to and parallel to the plane of the circular motion trajectory of the moving contact c01, therefore, as shown in the attached... Figure 6a As shown in 6b, 6c, and 6d, regardless of the polarity of the product, the electric arc can fully enter one of the two arc-extinguishing components, improving the magnetic blow-out effect and thus improving the breaking performance of the disconnecting switch.

[0044] Example 2

[0045] As attached Figure 7 As shown in Figures 8, 9, 10, and 11, the length of the arc-extinguishing grid plate 101a in the middle portion of the fan-shaped arc-extinguishing grid plates 101 is longer than the length of the arc-extinguishing grid plates 101b on both sides. The other structures are the same as in Embodiment 1.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An arc-extinguishing system, characterized in that: It includes at least two arc-extinguishing components (a, a'), and a permanent magnet component (b) is installed between the at least two arc-extinguishing components (a, a') to form a whole.

2. The arc extinguishing system as described in claim 1, characterized in that: A permanent magnet assembly (b) is installed between two adjacent arc-extinguishing assemblies (a, a').

3. The arc extinguishing system as described in claim 2, characterized in that: The at least two arc-extinguishing components (a, a') are symmetrically arranged on both sides of the permanent magnet component (b).

4. The arc extinguishing system as described in claim 1, characterized in that: The at least two arc-extinguishing components (a, a') each include a plurality of arc-extinguishing grid plates (101), the two ends of which are mounted on a pair of side plates (102, 102').

5. An arc-extinguishing system as described in claim 1, characterized in that: The permanent magnet assembly (b) includes a permanent magnet (b01), which is installed in the cavity of the permanent magnet mounting box (b02).

6. An arc-extinguishing system as described in claim 5, characterized in that: The permanent magnet mounting box (b02) has limiting mounting protrusions (b0202, b0202') arranged on the side corresponding to at least two arc extinguishing components (a, a'). The limiting mounting protrusions (b0202, b0202') lock the corresponding side plates of the at least two arc extinguishing components (a, a') so that the at least two arc extinguishing components (a, a') and the permanent magnet assembly (b) form a whole.

7. An arc-extinguishing system as described in claim 1, characterized in that: The at least two arc-extinguishing components (a, a') and the permanent magnet component (b) are integrally arranged on one side of the rotation trajectory of the moving contact (c01) in the contact module (c).

8. An arc-extinguishing system as described in claim 1, characterized in that: The magnetic pole direction of the permanent magnet (b01) is perpendicular to the movement trajectory of the corresponding moving contact (c01) and parallel to the plane on which the movement trajectory of the moving contact (c01) is located.

9. An arc-extinguishing system as described in claim 7, characterized in that: Several arc-extinguishing grid plates (101) are arranged in a fan shape, with the center of the fan facing the rotation center of the moving contact (c01).

10. An arc-extinguishing system as described in claim 9, characterized in that: The shape of the permanent magnet (b01) matches the arrangement shape of the plurality of arc-extinguishing grid plates (101).

11. An arc-extinguishing system as described in claim 10, characterized in that: The magnetic poles of the permanent magnet (b01) are arranged along the width direction of the permanent magnet (b01).

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