Arc extinguishing system for enhancing magnetic blow-out effect

Abstract

An arc extinguishing system capable of enhancing a magnetic blow-out effect comprises a contact system and an arc extinguishing chamber, the contact system comprises a moving contact and a static contact, electric arcs generated by breaking of the moving contact and the static contact are extinguished through an arc extinguishing grid sheet in the arc extinguishing chamber and then are discharged, the moving contact comprises an arc contact and a main contact, and the main contact is arranged in the arc extinguishing chamber. And a permanent magnet is arranged at a corresponding position beside the arc contact, and the magnetic field of the permanent magnet can lengthen an electric arc generated by breaking the moving contact and the static contact and blow the electric arc to the side surface position of the arc extinguish chamber to extinguish the electric arc at the same time. According to the arc extinguishing system, the permanent magnet is arranged in the corresponding area of the arc contact, and the arc is lengthened by using the strong magnetic field force of the permanent magnet, so that the high-voltage arc can be smoothly extinguished. Meanwhile, the permanent magnet blows the electric arc to the side surface position of the arc extinguishing chamber, so that the electric arc is cut and extinguished by the arc extinguishing grid sheets as many as possible.

Description

Technical Field

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

[0002] In the current low-voltage electrical appliance field, DC switches can only withstand voltages up to DC 1500V. According to the latest development needs of the low-voltage electrical appliance industry, DC switches will need to withstand current and voltage up to AC 2000V and DC 3000V. Currently, products can only achieve single-pole DC 750V and two-pole DC 1500V; none on the market meet the standard requirement of DC 2500V. Traditionally, DC 1500V products typically use 4-pole switches connected in series, but these 4-pole switches are bulky and expensive. To reduce costs, 2-pole / DC 1500V and 2-pole / DC 2000V products have emerged on the market. However, these 2-pole / DC 1500V and 2-pole / DC 2000V products require each pole to withstand a higher voltage. This results in excessively high voltage division on each individual pole of the 2-pole switch, making it difficult to extinguish the arc and potentially leading to insulation failure. (See attached image) Figure 1 As shown, the contacts are divided into main contacts and arc contacts, with the gas-generating element extending between them. During opening, the arc mainly originates on the arc contact. The arc generated by the arc contact enters the arc-extinguishing grid and is then ejected to the outside through the gas passage. However, in high-voltage products, this contact system structure cannot completely extinguish the high-voltage arc generated by the breaking of the moving and stationary contacts. This results in severe arc ignition due to the lack of an escape channel for the high-voltage arc generated during breaking, ultimately leading to arc extinguishing failure. Summary of the Invention

[0003] The purpose of this invention is to address the defect in existing high-voltage circuit breaker products where the interrupted arc cannot be completely extinguished by the arc-extinguishing grids, leading to arc-extinguishing failure. This invention provides an arc-extinguishing system that enhances the magnetic blow-out effect. Permanent magnets are arranged in the corresponding area of ​​the arc contact. The powerful magnetic force of the permanent magnets elongates the arc, allowing the high-voltage arc to be extinguished smoothly. Simultaneously, the permanent magnets blow the arc to the side of the arc-extinguishing chamber, ensuring that the arc is cut and extinguished by as many arc-extinguishing grids as possible.

[0004] Technical solution

[0005] To achieve the above-mentioned technical objectives, the present invention provides an arc-extinguishing system that enhances the magnetic blowout effect. It includes a contact system and an arc-extinguishing chamber. The contact system includes a moving contact and a stationary contact. The arc generated by the breaking of the moving and stationary contacts is extinguished by an arc-extinguishing grid within the arc-extinguishing chamber and then discharged. The moving contact includes an arc contact and a main contact. The invention is characterized in that a permanent magnet is arranged at a corresponding position next to the arc contact. The magnetic field of the permanent magnet can lengthen the arc generated by the breaking of the moving and stationary contacts while simultaneously blowing the arc towards the side of the arc-extinguishing chamber, thereby extinguishing the arc.

[0006] In one embodiment, the permanent magnet is arranged on the side of the arc contact.

[0007] In one embodiment, the permanent magnet is arranged in the space between the at least two side-by-side arc contacts.

[0008] In one embodiment, the permanent magnet is embedded in a cavity formed by the assembly of two adjacent, side-by-side arc contacts.

[0009] In one embodiment, the permanent magnet is arranged at one end of the arc contact near the arc contact point.

[0010] In one embodiment, the magnetic poles of the permanent magnet are oriented with one end pointing into the arc-extinguishing chamber and the other end pointing away from the arc-extinguishing chamber.

[0011] In one embodiment, the permanent magnet is fixed to a position beside the arc contact in the direction of the arrangement of the arc contact and the main contact, and is located on the side of the arc contact closer to the main contact.

[0012] In one embodiment, the magnetic poles of the permanent magnet point to both ends of the arc contact and the main contact arrangement direction, respectively.

[0013] In one embodiment, the permanent magnet is arranged on the side of the arc contact away from the arc contact point.

[0014] In one embodiment, the permanent magnet is arranged on the same side of the arc contact.

[0015] Beneficial effects

[0016] This invention provides an arc-extinguishing system with enhanced magnetic blowout effect. It includes a contact system and an arc-extinguishing chamber. The contact system includes a moving contact and a stationary contact. The arc generated by the breaking of the moving and stationary contacts is extinguished by arc-extinguishing grids within the arc-extinguishing chamber and then discharged. The moving contact includes an arc contact and a main contact. A permanent magnet is arranged at a corresponding position next to the arc contact. The magnetic field of the permanent magnet can lengthen the arc generated by the breaking of the moving and stationary contacts while blowing the arc towards the side of the arc-extinguishing chamber, thus extinguishing the arc. This arc-extinguishing system arranges permanent magnets in the corresponding area of ​​the arc contact, utilizing the strong magnetic force of the permanent magnets to lengthen the arc, allowing high-voltage arcs to be extinguished smoothly. Simultaneously, the permanent magnets blow the arc towards the side of the arc-extinguishing chamber, ensuring that the arc is cut and extinguished by as many arc-extinguishing grids as possible. Attached Figure Description

[0017] 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.

[0018] Appendix Figure 1 This is a schematic diagram of the arc extinguishing system structure in the existing technology;

[0019] Appendix Figure 2 This is a schematic diagram of the arc extinguishing system structure in Embodiment 1 of the present invention. Figure 1 ;

[0020] Appendix Figure 3 This is a schematic diagram of the arc extinguishing system structure in Embodiment 1 of the present invention. Figure 2 ;

[0021] Appendix Figure 4 This is a three-dimensional schematic diagram of the arc extinguishing system in Embodiment 1 of the present invention;

[0022] Appendix Figure 5 This is a schematic diagram of the position of the permanent magnet in Embodiment 1 of the present invention;

[0023] Appendix Figure 6 This is a schematic diagram of the position of the permanent magnet in Embodiment 2 of the present invention;

[0024] Appendix Figure 7 This is a schematic diagram of the position of the permanent magnet in Embodiment 3 of the present invention; Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example 1

[0031] As attached Figure 1As shown in the figure, in the existing technology, the traditional contact system structure, when applied to high-voltage products, cannot completely extinguish the high-voltage arc generated during the breaking of the moving and stationary contacts. This results in severe arc initiation due to the lack of an escape channel for the high-voltage arc during breaking, ultimately leading to arc extinguishing failure. To solve this problem, as shown in the attached figure... Figure 2 As shown in Figures 3 and 4, this embodiment provides an arc-extinguishing system that enhances the magnetic blowout effect. It includes a contact system a and an arc-extinguishing chamber b. The contact system a includes a moving contact 1 and a stationary contact 2. The arc generated by the breaking of the moving contact 1 and the stationary contact 2 is extinguished by the arc-extinguishing grid 3 in the arc-extinguishing chamber b and then discharged. The moving contact 1 includes an arc contact 101 and a main contact 102. The arc contact 101 and the main contact 102 are separated into different areas by an insulating component 5. The arc contact 101 adopts a form of closing first and then opening, so that the arc generated when opening is mainly generated on the arc contact 101.

[0032] A permanent magnet 4 is arranged at a corresponding position next to the arc contact 101, and the permanent magnet 4 is fixed to the arc contact 101 and located next to the arc contact 101. (See attached image) Figure 5 As shown, in this embodiment, the permanent magnet 4 is arranged in the space between the at least two parallel arc contacts 101. One end of the permanent magnet 4 points into the arc-extinguishing chamber b, and the other end points away from the arc-extinguishing chamber b, thus achieving non-polarity.

[0033] The magnetic field of the permanent magnet 4 can elongate the arc generated by the breaking of the moving contact 1 and the stationary contact 2, while blowing the arc towards the side of the arc-extinguishing chamber b, so that the arc is elongated and extinguished by cutting with as many arc-extinguishing grid plates 3 as possible, or by contacting the insulating part 5 to generate gas and accelerate extinguishing. Then, the arc generated by the breaking of the moving contact 1 and the stationary contact 2 is blown towards the side of the arc-extinguishing chamber b by the magnetic field of the permanent magnet 4 and discharged through the exhaust port at the rear end of the arc-extinguishing chamber b. In detail, as shown in the attached... Figure 2 As shown, according to the left-hand rule, due to the magnetic force F of the permanent magnet, when the current flows from the stationary contact 2 to the moving contact 1, the air blows upwards; when the current flows from the stationary contact 2 to the moving contact 1, the air blows upwards. Figure 3 When the electric arc blows from the moving contact 1 to the stationary contact 1, it blows downwards. Finally, regardless of whether the arc blows upwards or downwards, it is discharged from the exhaust port b01 at the rear end of the arc-extinguishing chamber b.

[0034] Example 2

[0035] As attached Figure 6 As shown, in this embodiment, the permanent magnet 4 is embedded in the cavity c formed by two adjacent arc contacts 101 arranged side by side. Other structures and working principles are the same as in Embodiment 1.

[0036] Example 3

[0037] As attached Figure 7As shown, in this embodiment, the arc contact 101 has an arc contact point 101a that contacts the stationary contact 2. The permanent magnet 4 is arranged at one end of the arc contact 101 near the arc contact point 101a. Specifically, the permanent magnet 4 is arranged on the side of the arc contact 101 away from the arc contact point 101a and is located on the trajectory of the arc contact 101 moving in the opening direction.

[0038] Furthermore, the permanent magnet 4 can also be arranged on the arc contact 101 on the same side as the arc contact 101a.

[0039] The other structures and working principles of this embodiment are the same as those of Embodiment 1, and it can also achieve the purpose of using the powerful magnetic force of the permanent magnet to lengthen the electric arc, so that the high-voltage electric arc can be extinguished smoothly.

[0040] Example 4

[0041] In this embodiment, the permanent magnet 4 is arranged to the side of the arc contact 101 in the direction of its movement trajectory. Specifically, the permanent magnet 4 is fixed to the side of the arc contact 101 in the direction of the arrangement of the arc contact 101 and the main contact 102, and is located on the side of the arc contact 101 closer to the main contact 102.

[0042] Example 5

[0043] In this embodiment, the magnetic poles of the permanent magnet 4 point to the two ends of the arrangement direction of the arc contact 101 and the main contact 102, respectively. This achieves polarity in the switch.

[0044] This invention provides an arc-extinguishing system with enhanced magnetic blowout effect, comprising a contact system a and an arc-extinguishing chamber b. The contact system a includes a moving contact 1 and a stationary contact 2. The arc generated by the breaking of the arc between the moving contact 1 and the stationary contact 2 is extinguished by arc-extinguishing grids 3 within the arc-extinguishing chamber b and then discharged. The moving contact 1 includes an arc contact 101 and a main contact 102. The key feature is that a permanent magnet 4 is arranged at a corresponding position next to the arc contact 101. The magnetic field of the permanent magnet 4 can elongate the arc generated by the breaking of the arc between the moving contact 1 and the stationary contact 2 while blowing the arc towards the side of the arc-extinguishing chamber b, allowing the arc to be cut and extinguished by as many arc-extinguishing grids 3 as possible. This arc-extinguishing system arranges permanent magnets in the corresponding area of ​​the arc contact, utilizing the powerful magnetic force of the permanent magnets to elongate the arc, enabling the high-voltage arc to be extinguished smoothly. Simultaneously, the permanent magnets blow the arc towards the side of the arc-extinguishing chamber, allowing the arc to be cut and extinguished by as many arc-extinguishing grids as possible.

[0045] 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.

[0046] 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 for enhancing magnetic blowout effect, comprising a contact system (a) and an arc-extinguishing chamber (b), wherein the contact system (a) comprises a moving contact (1) and a stationary contact (2), wherein the arc generated by the moving contact (1) and the stationary contact (2) is extinguished by an arc-extinguishing grid (3) in the arc-extinguishing chamber (b) and discharged, wherein the moving contact (1) comprises an arc contact (101) and a main contact (102), characterized in that: A permanent magnet (4) is arranged at a corresponding position next to the arc contact (101). The magnetic field of the permanent magnet (4) can lengthen the arc generated by the moving contact (1) and the stationary contact (2) while blowing the arc towards the side of the arc extinguishing chamber (b) so that the arc is extinguished.

2. The arc-extinguishing system for enhancing magnetic blowout effect as described in claim 1, characterized in that: The permanent magnet (4) is arranged on the side of the arc contact (101).

3. The arc-extinguishing system for enhancing magnetic blowout effect as described in claim 2, characterized in that: The permanent magnet (4) is arranged in the space between the at least two parallel arc contacts (101).

4. The arc-extinguishing system for enhancing magnetic blowout effect as described in claim 3, characterized in that: The permanent magnet (4) is embedded in a cavity (c) formed by two adjacent arc contacts (101).

5. The arc-extinguishing system for enhancing magnetic blowout effect as described in claim 1, characterized in that: The permanent magnet (4) is arranged at one end of the arc contact (101) near the arc contact point (101a).

6. The arc-extinguishing system for enhancing magnetic blowout effect as described in claim 1, characterized in that: The permanent magnet (4) has one end pointing into the arc-extinguishing chamber (b) and the other end pointing away from the arc-extinguishing chamber (b).

7. An arc-extinguishing system for enhancing magnetic blowout effect as described in claim 2, characterized in that: The permanent magnet (4) is fixed to the side of the arc contact (101) in the arrangement direction of the arc contact (101) and the main contact (102), and is located on the side of the arc contact (101) closer to the main contact (102).

8. The arc-extinguishing system for enhancing magnetic blowout effect as described in claim 1, characterized in that: The magnetic poles of the permanent magnet (4) point to the two ends of the arrangement direction of the arc contact (101) and the main contact (102), respectively.

9. An arc-extinguishing system for enhancing magnetic blowout effect as described in claim 5, characterized in that: The permanent magnet (4) is arranged on the side of the arc contact (101) away from the arc contact point (101a).

10. An arc-extinguishing system for enhancing magnetic blowout effect as described in claim 5, characterized in that: The permanent magnet (4) is arranged on the arc contact (101) on the same side as the arc contact (101a).

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