Arc extinguishing system
By rearranging the permanent magnets and arc extinguishing chambers in the disconnector, the permanent magnet poles are designed to be perpendicular and parallel to the movement of the moving contact, which solves the polarity problem and poor magnetic blow-off effect caused by the magnet arrangement, achieves efficient arc extinguishing, and improves the breaking performance.
Patent Information
- Application Number
- CN202422325602.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The magnet arrangement in existing disconnectors results in product polarity and poor magnetic blowout, affecting breaking performance.
A permanent magnet assembly is installed between at least two arc extinguishing assemblies to form a whole. The magnetic pole direction of the permanent magnet is perpendicular and parallel to the movement trajectory of the moving contact. The arc quickly enters the arc extinguishing assembly in the area with the strongest magnetic field of the permanent magnet and is extinguished by the arc extinguishing grid.
The breaking performance of the disconnector is improved, and the magnetic blowing effect can effectively extinguish the arc regardless of the product's energized polarity, thereby improving product performance.
Smart Images
Figure CN223401524U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and specifically relates to an arc extinguishing system. Background Art
[0002] As a switching device, the isolating switch has an insulation distance that meets the specified requirements and an obvious disconnect mark between the contacts 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 the DC operating environment as an example, the rated working voltage has been increased to DC1500V. The performance level of the product is getting higher and higher. The existing disconnectors often use magnets to increase the magnetic blowing force, thereby accelerating the arc extinguishing speed to improve the disconnecting performance of the disconnector. However, in the existing technology, the magnets are usually placed on both sides of the arc extinguishing chamber with their polarities attracted to each other. This magnet arrangement method will make the product polarized. Another method is to use a method in which the magnet charging direction is approximately parallel to the separation direction of the moving and static contacts, but this structure will still reduce the magnetic blowing effect of the magnet. Utility Model Content
[0004] The purpose of the present utility model is to provide an arc extinguishing system to address the shortcomings of the above-mentioned existing isolating switch in that the arrangement of magnets not only causes the product to produce polarity but also has poor magnetic blowing effect. By rearranging and designing the installation position of the permanent magnet and the position of the arc extinguishing chamber, it not only avoids the polarity of the product but also improves the magnetic blowing effect, thereby improving the breaking performance of the isolating switch.
[0005] Technical Solution
[0006] In order to achieve the above technical objectives, the present invention provides an arc extinguishing system, which is characterized by comprising 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 assemblies are symmetrically arranged on both sides of the permanent magnet assembly b.
[0009] In one embodiment, the at least two arc-extinguishing assemblies each include a plurality of arc-extinguishing grids, and both side ends of the plurality of arc-extinguishing grids are mounted on a pair of side plates.
[0010] In one embodiment, the permanent magnet assembly includes a permanent magnet, and the permanent magnet is installed in the inner cavity of the permanent magnet mounting box.
[0011] In one embodiment, a limiting mounting protrusion is arranged on the side of the permanent magnet mounting box corresponding to the at least two arc extinguishing assemblies, and the limiting mounting protrusion clamps the corresponding side plates of the at least two arc extinguishing assemblies so that the at least two arc extinguishing assemblies and the permanent magnet assembly form a whole.
[0012] In one embodiment, the at least two arc extinguishing assemblies and the permanent magnet assembly form an integral structure arranged on one side of the rotating track of the moving contact in the contact module.
[0013] In one embodiment, the magnetic pole direction of the permanent magnet is perpendicular to the corresponding moving contact movement trajectory and parallel to the plane of the moving contact movement trajectory. In one embodiment, the arc extinguishing grids are arranged in a fan shape, and the center of the fan shape is toward the side of the rotation center of the moving contact 1.
[0014] In one embodiment, the shape of the permanent magnet matches the arrangement shape of the arc-extinguishing grids.
[0015] In one embodiment, the magnetic pole direction of the permanent magnet is arranged along the width direction of the permanent magnet.
[0016] Beneficial effects
[0017] The utility model provides an arc extinguishing system, characterized in that it includes at least two arc extinguishing assemblies, and a permanent magnet assembly is installed between the at least two arc extinguishing assemblies to form a whole. By rearranging and designing the permanent magnet installation position and the arc extinguishing chamber position, the arc is in the area with the strongest magnetic field of the permanent magnet, and the magnetic field force of the permanent magnet directly and maximizes the effect on the arc generated by the disconnection of the disconnector, so that the arc can quickly enter the arc extinguishing assembly and be extinguished by the arc extinguishing grid. Since the magnetic pole direction of the permanent magnet is designed to be perpendicular to the arc motion trajectory of the moving contact and parallel to the plane where the arc motion trajectory of the moving contact is located, the arc can fully enter one of the two arc extinguishing assemblies regardless of the positive or negative polarity of the product, thereby improving the magnetic blowing effect and thus improving the disconnection performance of the disconnector. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0019] Attachment Figure 1 This is a schematic diagram of the installation of an arc extinguishing system in an embodiment of the present invention.
[0020] Attachment Figure 2 It is a three-dimensional schematic diagram of an arc extinguishing system in an embodiment of the present utility model.
[0021] Attachment Figure 3 This is a front view of an arc extinguishing system in an embodiment of the present invention.
[0022] Attachment Figure 4 It is a top view of an arc extinguishing system in an embodiment of the present invention.
[0023] Attachment Figure 5 It is a schematic diagram of the decomposition of an arc extinguishing system in an embodiment of the present invention.
[0024] Attachment Figure 6a This is a schematic diagram of the magnetic field of Example 1 of the present utility model Figure 1 .
[0025] Attachment Figure 6b This is a schematic diagram of the magnetic field of Example 1 of the present utility model Figure 2 .
[0026] Attachment Figure 6c This is a schematic diagram of the magnetic field of Example 1 of the present utility model Figure 3 .
[0027] Attachment Figure 6d This is a schematic diagram of the magnetic field of Example 1 of the present utility model Figure 4 .
[0028] Attachment Figure 7 This is a schematic diagram of the installation of arc extinguishing system 2 in the embodiment of the present utility model.
[0029] Attachment Figure 8 It is a three-dimensional schematic diagram of arc extinguishing system 2 in an embodiment of the present utility model.
[0030] Attachment Figure 9 This is a front view of arc extinguishing system 2 in an embodiment of the present utility model.
[0031] Attachment Figure 10 It is a top view of arc extinguishing system 2 in the embodiment of the present utility model.
[0032] Attachment Figure 11 This is a schematic diagram of the decomposition of the arc extinguishing system in the embodiment of the utility model. DETAILED DESCRIPTION
[0033] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts 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 "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.
[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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0036] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below,” “below,” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0037] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.
[0038] Example 1
[0039] An arc extinguishing system includes at least two arc extinguishing assemblies a, a', with a permanent magnet assembly b installed between the at least two arc extinguishing assemblies a, a' to form an integral whole. In practice, multiple arc extinguishing assemblies a, a' may be stacked on one side of the permanent magnet assembly b.
[0040] In this embodiment, as shown in the attached Figure 2, 3, 4 and 5, the at least two arc extinguishing assemblies a, a' are preferably provided with a permanent magnet assembly b between two adjacent arc extinguishing assemblies a, a'. In order to ensure that the breaking arc can be blown into the at least two arc extinguishing assemblies a, a' as much as possible by the magnet, the at least two arc extinguishing assemblies a, a' are symmetrically arranged on both sides of the permanent magnet assembly b. Figure 2 and 5 As shown, the at least two arc-quenching assemblies a and a' each include a plurality of arc-quenching grids 101, the ends of which are mounted on a pair of side plates 102 and 102', which are insulating members. The arc-quenching grids 101 are arranged in a fan-shaped pattern, with the length of the first arc-quenching grid 101a in the middle portion of the fan-shaped arc-quenching grids 101 being no shorter than the length of the second arc-quenching grids 101b on either side. In this embodiment, the length of the first arc-quenching grid 101a in the middle portion of the fan-shaped arc-quenching grids 101 is the same as the length of the second arc-quenching grids 101b on either side.
[0041] Specifically, in the arc extinguishing system, as shown in the attached Figure 2 , 3 and 4, the side plates on the opposite sides of the at least two arc extinguishing assemblies a, a' are assembled with the corresponding side of the permanent magnet assembly b so that the at least two arc extinguishing assemblies a, a' and the permanent magnet assembly b form a whole. The permanent magnet assembly b includes a permanent magnet b01, which is mounted in the inner cavity of the permanent magnet mounting box b02. As shown in the attached Figure 5 As shown, the permanent magnet mounting box b02 is provided with limiting mounting protrusions b0202 and b0202' on the side surfaces corresponding to the at least two arc extinguishing assemblies a and a'. The limiting mounting protrusions b0202 and b0202' engage the corresponding side panels of the at least two arc extinguishing assemblies a and a'. The limiting mounting protrusions b0202 are also provided with a clearance groove corresponding to the arc extinguishing grid 101. At the same time, the arc extinguishing grid 101 is attracted by the permanent magnet b01, so that the at least two arc extinguishing assemblies a and a' and the permanent magnet assembly b form a whole. The permanent magnet mounting box b is an insulating mounting box. The permanent magnet mounting box b is composed of a base box 201 and a cover 202. The base box 201 and the cover 202 are correspondingly snapped 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 assemblies a and 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 corresponding 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 where the movement trajectory of the moving contact c01 is located. 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 tangential to its trajectory, and the magnetic pole directions N(S) to S(N) of the permanent magnet b01 are perpendicular to this tangent). Several arc-quenching grids 101 are arranged in a fan-shaped pattern, with the center of the fan oriented toward the rotation center of the moving contact c01. The shape of the permanent magnet b01 matches the arrangement of the arc-quenching grids 101. The number of at least two arc-quenching assemblies a and a' is two.
[0043] The utility model 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. By rearranging and designing the permanent magnet installation position and the arc extinguishing chamber position, the arc is in the area where the permanent magnet magnetic field is strongest, and the magnetic field force of the permanent magnet directly and maximally acts on the arc generated by the disconnection of the disconnector, so that the arc can quickly enter the arc extinguishing component and be extinguished by the arc extinguishing grid. Since the magnetic pole direction of the permanent magnet b01 is designed to be perpendicular to the arc motion trajectory of the moving contact c01 and parallel to the plane of the arc motion trajectory of the moving contact c01, as shown in the attached figure Figure 6a As shown in Figures 6b, 6c, and 6d, regardless of the positive or negative polarity of the product's current flow, the arc can fully enter one of the two arc-extinguishing components, thereby improving the magnetic blowing effect and thus improving the breaking performance of the disconnector.
[0044] Example 2
[0045] As attached Figure 7 8, 9, 10 and 11, the length of the arc quenching grid 1 101a in the middle part of the plurality of fan-shaped arc quenching grids 101 is longer than the length of the arc quenching grid 2 101b on both sides. The other structures are the same as those in embodiment 1.
[0046] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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 above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.
Claims
1. An arc extinguishing system, characterized in that: The invention comprises 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; The at least two arc extinguishing components (a, a') and the permanent magnet component (b) form an integral body arranged on one side corresponding to the rotation track of the moving contact (c01) in the contact module (c).
2. An arc extinguishing system according to claim 1, characterized in that: A permanent magnet assembly (b) is installed between two adjacent arc extinguishing assemblies (a, a') of the at least two arc extinguishing assemblies (a, a').
3. An arc extinguishing system according to 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 according to claim 1, characterized in that: The at least two arc-extinguishing assemblies (a, a') each comprise a plurality of arc-extinguishing grids (101), and both side ends of the plurality of arc-extinguishing grids (101) are mounted on a pair of side plates (102, 102').
5. The arc extinguishing system according to claim 1, characterized in that: The permanent magnet assembly (b) includes a permanent magnet (b01), and the permanent magnet (b01) is installed in the inner cavity of a permanent magnet installation box (b02).
6. An arc extinguishing system according to claim 5, characterized in that: Limiting mounting protrusions (b0202, b0202') are arranged on the side surfaces of the permanent magnet mounting box (b02) corresponding to the at least two arc extinguishing assemblies (a, a'). The limiting mounting protrusions (b0202, b0202') clamp the corresponding side plates of the at least two arc extinguishing assemblies (a, a') so that the at least two arc extinguishing assemblies (a, a') and the permanent magnet assembly (b) form a whole.
7. The arc extinguishing system according to claim 1, characterized in that: The magnetic pole direction of the permanent magnet (b01) is perpendicular to the motion trajectory of the corresponding moving contact (c01) and parallel to the plane where the motion trajectory of the moving contact (c01) is located.
8. The arc extinguishing system according to claim 1, characterized in that: A plurality of arc extinguishing grids (101) are arranged in a fan shape, with the center of the fan shape facing the rotation center of the moving contact (c01).
9. An arc extinguishing system according to claim 8, characterized in that: The shape of the permanent magnet (b01) matches the arrangement shape of the plurality of arc-extinguishing grids (101).
10. An arc extinguishing system according to claim 9, characterized in that: The magnetic pole direction of the permanent magnet (b01) is arranged along the width direction of the permanent magnet (b01).