Two-side arc extinguishing type contact arc extinguishing system
By designing a two-sided arc-extinguishing contact system, the contact head and rod of the arc contact are at an angle. The electric repulsion force is used to direct the arc magnetic blowing force to both sides, which solves the problem of arc extinguishing failure of low-voltage electrical products under high voltage and achieves effective arc extinguishing under higher voltage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2026-03-31
AI Technical Summary
Existing low-voltage electrical products are prone to main contact breakdown and arc extinguishing failure under high voltage conditions, failing to meet the DC2500V standard requirements. Furthermore, the voltage across each pole of the 2P product is too high, making it difficult to extinguish the arc.
Design a two-sided arc-extinguishing contact system, in which the contact head and rod of the arc contact form an angle, the arc channel of the arc-extinguishing chamber corresponds to the contact head of the arc contact, and the electric repulsion force is used to direct the arc magnetic blowing force to both sides, thereby enhancing the arc extinguishing effect.
By optimizing the contact shape and layout, the product width space is fully utilized, the arc extinguishing effect is improved, the main contact breakdown is avoided, and the DC2500V voltage requirement is met.
Smart Images
Figure CN121768893A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of low-voltage electrical technology, specifically relating to an arc-extinguishing system with two-sided arc-extinguishing contacts. 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, but these are bulky and expensive. To reduce costs, 2-pole / DC 1500V and 2-pole / DC 2000V products have emerged. 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 product, making it difficult to extinguish the arc and potentially leading to insulation failure. (See attached image) Figure 1 As shown, in the prior art, the contacts rotate around the shaft, and the two pole contacts of the arc extinguishing system extend in parallel and face the arc extinguishing grid. After an electric arc is generated, the air outlet direction is upward. In this conventional DC2000V product, the main contacts need to be completely isolated to concentrate the arc on the arc contacts; otherwise, the main contacts are prone to severe breakdown, resulting in severe arcing of the main contacts and arc extinguishing failure. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of the above-mentioned contact structure, which is prone to main contact breakdown, severe arc initiation, and arc extinguishing failure. It provides a two-sided arc extinguishing contact arc extinguishing system. By changing the shape of the contact head, it not only makes full use of the product width space, but also generates an electric repulsion force that directs the arc magnetic blowing force of the two pole contacts to both sides, thereby improving the arc extinguishing effect.
[0004] Technical solution
[0005] To achieve the above-mentioned technical objectives, the present invention provides a two-sided arc-extinguishing contact arc-extinguishing system, characterized in that: it includes at least an arc contact, wherein the contact head and the rod of the arc contact form an angle, and the arc channel of the arc-extinguishing chamber corresponds to the contact head of the arc contact.
[0006] In one embodiment, the contact head and the rod of the arc contact form a 90° angle.
[0007] In one embodiment, a main contact is also included, with the arc-extinguishing chamber disposed above the main contact.
[0008] In one embodiment, the length of the arc contact is longer than the length of the main contact.
[0009] In one embodiment, the main contacts are arranged side by side on both sides of the arc contact.
[0010] In one embodiment, the number of arc contacts is two.
[0011] In one embodiment, the rods of the two arc contacts are parallel.
[0012] In one embodiment, the contact heads of the two arc contacts are angled in opposite directions to the rods of the corresponding arc contacts.
[0013] In one embodiment, arc-extinguishing chambers corresponding to the contact head of the arc contact are arranged on both sides of the arc contact.
[0014] In one embodiment, a plurality of main contacts are parallel to the stem portion of the arc contact.
[0015] In one embodiment, the switch includes two poles, each pole having one arc contact in its contact system.
[0016] In one embodiment, the switch includes two poles, and at least one of the poles has two arc contacts in its contact system.
[0017] In one embodiment, the arc-extinguishing grid is U-shaped, the arc channel is a narrow slit formed by a gas-generating element fitted onto the arc-extinguishing grid in the arc-extinguishing chamber, and the movement trajectory of the contact head of the arc contact is located in the groove of the U-shaped arc-extinguishing grid.
[0018] In one embodiment, a permanent magnet is arranged on one side of the contact head of the arc contact at a corresponding position outside the arc extinguishing chamber to increase the magnetic blowing force.
[0019] In one embodiment, the magnetic poles of the permanent magnet are opposite each other.
[0020] Beneficial effects
[0021] This invention provides a two-sided arc-extinguishing contact arc-extinguishing system, comprising at least an arc contact, wherein the contact head and the rod of the arc contact form an angle, and the arc channel of the arc-extinguishing chamber corresponds to the contact head of the arc contact. By changing the shape of the contact head, not only is the product width space fully utilized, but the generated electro-repulsive force also directs the arc magnetic blowing force of the two-pole contacts to both sides, thereby improving the arc-extinguishing effect. Attached Figure Description
[0022] 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.
[0023] Appendix Figure 1 This is a schematic diagram of the contact arc-extinguishing chamber structure in the prior art;
[0024] Appendix Figure 2 This is a schematic diagram of the contact arc-extinguishing chamber structure in an embodiment of the present invention;
[0025] Appendix Figure 3 This is a three-dimensional schematic diagram of the contact arc-extinguishing chamber system in an embodiment of the present invention;
[0026] Appendix Figure 4 This is a schematic diagram of the electric repulsion force in the contact arc-extinguishing chamber of this invention.
[0027] Appendix Figure 5 This is a schematic diagram of the installation of the contact arc-extinguishing chamber system in an embodiment of the present invention;
[0028] Appendix Figure 6 This is a schematic diagram of a contact system without a master contact in an embodiment of the present invention;
[0029] Appendix Figure 7 This is a schematic diagram of the permanent magnet installation in an embodiment of the present invention; Detailed Implementation
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] Example
[0036] As attached Figure 1 As shown, in existing technology, the contacts rotate around the axis, and the two pole contacts of the arc-extinguishing system extend in parallel and face the arc-extinguishing grid. After an arc is generated, the exhaust direction is upward. This traditional DC2000V product structure requires complete isolation of the main contacts to concentrate the arc on the arc contacts; otherwise, the main contacts are prone to severe breakdown, leading to severe arc initiation and arc-extinguishing failure. To solve this problem, as shown in the attached... Figure 2 and 3 As shown, this embodiment provides a two-sided arc-extinguishing contact arc-extinguishing system, including at least an arc contact 1. The contact head 1a and the rod portion 1b of the arc contact 1 form an angle, and the arc channel 2a of the arc-extinguishing chamber 2 corresponds to the contact head 1a of the arc contact 1. An arc silver point 1a01 is arranged on the contact head 1a of the arc contact 1.
[0037] Specifically, the contact head 1a and the rod portion 1b of the arc contact 1 preferably form a 90° angle. The arc extinguishing system also includes a main contact 3. The length of the arc contact 1 is longer than the length of the main contact 3. The main contacts 3 are arranged side by side on both sides of the arc contact 1, and a main silver point 3a is arranged on the main contact. There is one arc contact 1, and several main contacts 3 are parallel to the rod portion 1b of the arc contact 1. The rod portions 1b of the two arc contacts 1 are parallel.
[0038] In detail, see attached Figure 2 As shown, each of the two pole contact systems has one arc contact 1. The contact heads 1a of the two arc contacts 1 form angles with the corresponding rod portions 1b of the arc contact 1 in opposite directions. (See attached diagram) Figure 3 As shown, two arc-extinguishing chambers 2, corresponding to the contact heads 1a of the two arc contacts 1, are arranged on both sides of the two arc contacts 1 and above the main contact 3. The arc-extinguishing grid plates of the two arc-extinguishing chambers 2 correspond to the contact heads 1a of the two arc contacts 1, forming a symmetrical arrangement. The air outlets are on the left and right sides. In this way, the arc-extinguishing space can make full use of the product width, and the electric repulsion force will cause the arc magnetic blowing force of the two pole contacts to be directed to both sides, thereby successfully extinguishing the arc. At the same time, as shown in the attached... Figure 4 and 5 As shown, the currents at the positive and negative terminals of a DC product are in opposite directions. Since the currents are in opposite directions, the electrostatic repulsion forces are also in opposite directions, resulting in repulsive forces F1 and F2 as shown in the diagram. These repulsive forces are exactly in the same direction as the arc's movement, which can push the arc into the grid, enhancing its arc-extinguishing capability.
[0039] As attached Figure 3 As shown, the arc-extinguishing grid 2b is U-shaped, and the arc channel 2a is a narrow slit d formed by the gas-generating element 4 fitted onto the grid leg of the arc-extinguishing grid 2b in the arc-extinguishing chamber 2. The movement trajectory of the contact head 1a of the arc contact 1 is located in the groove of the U-shaped arc-extinguishing grid. When closing, the main silver point 3a and the arc silver point 1a01 of the moving contact 1 close with the corresponding contact points 6a, 6b of the stationary contact 6. When opening, the moving contact separates from the stationary contact 6. Throughout the entire movement process of the arc contact 1, the narrow slit d formed by the gas-generating element 4 fitted onto the U-shaped grid leg in the arc-extinguishing chamber effectively improves the arc extinguishing efficiency.
[0040] As attached Figure 7 As shown, a permanent magnet 5 is arranged on one side of the contact head 1a of the arc contact 1 at a corresponding position outside the arc-extinguishing chamber 2 to increase the magnetic blowing force. The magnetic poles of the permanent magnet 5 are opposite to each other.
[0041] It should be noted that, as shown in the attached document... Figure 6 As shown, in this embodiment, the main contact 3 is not required; the same effect can be achieved with only the arc contact 1. In this case, the arc contact is the main contact.
[0042] Similarly, some switches include two poles, with at least one pole having two arc contacts 1 in its contact system. The arc extinguishing system structure is also applicable to the structure of this embodiment.
[0043] This invention provides a two-sided arc-extinguishing contact arc-extinguishing system, comprising at least an arc contact 1. The contact head 1a and the rod portion 1b of the arc contact 1 form an angle, and the arc channel 2a of the arc-extinguishing chamber 2 corresponds to the contact head 1a of the arc contact 1. By changing the shape of the contact head, not only is the product width space fully utilized, but the generated electro-repulsive force also directs the arc magnetic blowing force of the two-pole contacts to both sides, thereby improving the arc-extinguishing effect.
[0044] 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.
[0045] 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. A two-sided arc extinguishing contact arc extinguishing system, characterized by: At least an arc contact (1), a contact part (1a) of the arc contact (1) and a stem part (1b) of the arc contact (1) form an angle, an arc passage (2a) of the arc chamber (2) corresponds to the contact part (1a) of the arc contact (1).
2. A two-side arc extinguishing contact arc extinguishing system as claimed in claim 1, characterized in that: The contact part (1a) of the arc contact (1) and the stem part (1b) of the arc contact (1) form an angle of 90 degrees.
3. A two side arc extinguishing contact arc extinguishing system as claimed in claim 1, characterized in that: Further comprising a main contact (3), the arc chamber (2) is arranged above the main contact (3).
4. A two side arc extinguishing contact arc extinguishing system as claimed in claim 3, characterized in that: The length of the arc contact (1) is longer than the length of the main contact (3).
5. A two side arc extinguishing contact arc extinguishing system as claimed in claim 4, characterized in that: The main contact (3) is arranged side by side on both sides of the arc contact (1).
6. An arc quenching system for a two side arc quenching contact as defined in claim 1, wherein: The number of the arc contact (1) is 2.
7. A two side arc extinguishing contact arc extinguishing system as claimed in claim 6, characterized in that: The stem parts (1b) of the 2 arc contacts (1) are parallel.
8. A two side arc extinguishing contact arc extinguishing system as claimed in claim 7, characterized in that: The contact parts (1a) of the 2 arc contacts (1) respectively form an angle with the stem parts (1b) of the corresponding arc contacts (1) in opposite directions.
9. An arc mitigation system for a two-side arc-extinguishing contact according to claim 1, characterized in that: The arc chamber (2) corresponding to the contact part (1a) of the arc contact (1) is arranged on both sides of the arc contact (1).
10. A two side arc extinguishing contact arc extinguishing system as claimed in claim 3, characterized in that: The stem parts (1b) of the arc contacts (1) are parallel to the main contacts (3).
11. A two side arc extinguishing contact arc extinguishing system as claimed in claim 6, characterized in that: The switch comprises 2 poles, and the number of the arc contacts (1) of the contact system of each pole is 1.
12. An arc quenching system for a two side arc quenching contact as defined in claim 6, wherein: The switch comprises 2 poles, and the number of the arc contacts (1) of the contact system of at least one of the poles is 2.
13. An arc mitigation system for a two-side arc-extinguishing contact according to claim 1, characterized in that: The arc chamber (2) is U-shaped, the arc passage (2a) is a narrow gap (d) formed by a gas generating element (4) sleeved on the arc chamber (2), and the movement track of the contact part (1a) of the arc contact (1) is located at the groove of the U-shaped arc chamber (2).
14. An arc mitigation system for a two-sided arc-extinguishing contact according to claim 1, characterized in that: A permanent magnet (5) is arranged at a corresponding position outside the arc chamber (1) on one side of the contact part (1a) of the arc contact (1) to increase the magnetic blow force.
15. An arc quenching system for a two-sided arc quenching contact as defined in claim 13, characterized in that: The magnetic poles of the permanent magnet (5) are opposite.