Contact system of switch and partitioned arc extinguish chamber
By partitioning the arc extinguishing chamber and designing arcing notches and exhaust channels, the problems of arcing contacts being broken down by the DC switch and arcing of the main contacts under high voltage are solved, and the arcing is effectively discharged, avoiding arc extinguishing failure, and improving the reliability and safety of the switch.
Patent Information
- Application Number
- CN202422415065.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Existing DC switches are prone to breakdown of arc contacts and serious arcing of main contacts at high voltages, resulting in arc failure. Especially in 2P/DC1500V and 2P/DC2000V products, arcs are difficult to effectively discharge.
The arc extinguishing chamber is divided into at least two areas. The arc generated when the arc contact and the main contact are separated by the arc extinguishing grid in different areas and then discharged through the corresponding exhaust passages. The gas generator is used to separate the arc contact and the main contact movement area and the corresponding arc extinguishing chamber indoor area, and the arc-induced notch and exhaust passage design are used to avoid interference between the arcs.
It effectively avoids the inability to discharge the arc, reduces the risk of arc extinguishing failure, and improves the reliability and safety of the switch at high voltages.
Smart Images
Figure CN223218153U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and specifically relates to a contact system and a partitioned arc extinguishing chamber of a switch, and is particularly suitable for a frame-type DC isolating switch. Background Art
[0002] In the existing low-voltage electrical field, the voltage that DC switches can withstand can only reach DC1500V. According to the latest development needs of the low-voltage electrical industry, the current and voltage that DC switches need to withstand will develop to AC2000V and DC3000V. Current products can only reach single-pole DC750V and two-pole DC1500V, and products on the market cannot meet the standard requirements of DC2500V. Traditionally, DC1500V products usually use 4P, but 4P products are large in size and high in cost. In order to reduce costs, 2P / DC1500V and 2P / DC2000V products are currently on the market. However, the voltage that each P of this 2P / DC1500V and 2P / DC2000V product needs to withstand is higher, resulting in each individual pole of the 2P product being difficult to extinguish the arc when extinguishing the arc due to the excessive single-pole voltage division, resulting in insulation failure. As shown in the attached figure Figure 1 As shown, the contacts are divided into main contacts and arcing contacts, with gas-generating components extending between the main and arcing contacts. During tripping, the arc primarily originates on the arcing contact. The arc generated by the arcing contact enters the arc-extinguishing grid, passes through the gas duct, and is ejected to the outside. However, with this contact system structure, when the arcing contact wears to a certain extent, both the main and arcing contacts may disconnect simultaneously. The arc generated when the main contact disconnects has no outlet, leading to severe arcing and the risk of arc extinguishing failure. Utility Model Content
[0003] The purpose of this utility model is to address the risk of arcing contacts easily breaking down and main contacts arcing seriously, which can lead to arc extinguishing failure in the existing frame-type DC disconnectors. The utility model provides a switch contact system and a zoned arc extinguishing chamber. The arc extinguishing chamber is divided into several zones. When the main contacts and arcing contacts in the contact system are disconnected, the arc is extinguished and discharged through the arc extinguishing grids in different zones. This prevents arcing failure, which can lead to arc extinguishing failure.
[0004] Technical Solution
[0005] In order to achieve the above technical objectives, the utility model provides a contact system and a partitioned arc extinguishing chamber of a switch, wherein the contact system includes an arc contact and a main contact, and is characterized in that: the arc extinguishing chamber is divided into at least two areas, and the arc contact and the main contact correspond to different areas of the arc extinguishing chamber during movement. The arc generated by the disconnection of the arc contact and the main contact passes through the arc extinguishing grid in the corresponding area of the arc extinguishing chamber and is discharged from the arc extinguishing chamber through the corresponding exhaust channel.
[0006] In one embodiment, the gas generating member divides the moving area of the arcing contact and the main contact and the corresponding inner area of the arc extinguishing chamber into a space corresponding to the arcing contact and a space corresponding to the main contact.
[0007] In one embodiment, a plurality of main contacts are arranged side by side on both sides of the arc contact, and a pair of gas-generating parts divide the arc contact 1 and the main contact movement area and the corresponding arc extinguishing grid area in the arc extinguishing chamber into space one corresponding to the arc contact and space two corresponding to the main contacts on both sides.
[0008] In one embodiment, the arc extinguishing chamber includes a plurality of stacked arc extinguishing grids, and protruding feet extend from both sides of the front end of the arc extinguishing grids. The protruding feet are respectively located in the space two, and the part between the protruding feet is located in the space one corresponding to the arc contact.
[0009] In one embodiment, the protruding foot is provided with an arc-striking notch 1, and the portion between the protrusions located in the space 1 is provided with an arc-striking notch 2.
[0010] In one embodiment, the first arc-striking notch is triangular, and the second arc-striking notch is circular.
[0011] In one embodiment, the space—the exhaust passage at the rear side of the arc extinguishing chamber—is bell-shaped from inside to outside.
[0012] In one embodiment, exhaust port 1 of exhaust channel 1 in space 1 at the rear side of the arc extinguishing chamber is larger than exhaust port 2 of exhaust channel 2 in space 2 at the rear side of the arc extinguishing chamber.
[0013] In one embodiment, the space on at least one side of the second space corresponding to the two main contacts can be further divided into at least two different spaces.
[0014] In one embodiment, the gas-generating part 1 divides the arc contact and main contact movement area and the corresponding arc extinguishing grid area of the arc extinguishing chamber from one side of the arc contact into a corresponding space 3 and a space 4 corresponding to the main contact on one side, and the space 4 can be further divided into at least two spaces.
[0015] In one embodiment, a plurality of main contacts are arranged side by side on both sides of the arc contact, and a pair of gas-generating parts divide the arc contact and main contact movement area and the corresponding arc extinguishing chamber inner area into space one corresponding to the arc contact and space two corresponding to the main contacts on both sides, and there is at least one group of independent grid plates in each of space one and space two.
[0016] In one embodiment, the gas generating member extends to the front of the rear wall of the arc extinguishing chamber or abuts against the rear wall, so that the moving areas of the arcing contact and the main contact are isolated from the corresponding areas inside the arc extinguishing chamber.
[0017] Beneficial effects
[0018] The present invention provides a switch contact system and a zoned arc extinguishing chamber. The contact system includes an arcing contact and a main contact. The arc extinguishing chamber is divided into at least two zones. During movement, the arcing contact and the main contact correspond to different zones of the arc extinguishing chamber. The arc generated by the arcing contact and the main contact disconnecting passes through the arc extinguishing grids in the corresponding zones of the arc extinguishing chamber and is then discharged from the arc extinguishing chamber through corresponding exhaust channels. The arc extinguishing chamber is divided into several zones. The arc generated when the main contact and the arcing contact disconnect in the contact system passes through the arc extinguishing grids in different zones and is then discharged. This prevents arc extinguishing failure, which could result in arc failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Attachment Figure 1 It is a schematic diagram of the structure of the contact arc extinguishing chamber system in the prior art;
[0021] Attachment Figure 2 This is a schematic diagram of the structure of the contact arc extinguishing chamber system in Example 1 of the present utility model;
[0022] Attachment Figure 3 This is a three-dimensional schematic diagram of the contact arc extinguishing chamber system in Example 1 of the present utility model;
[0023] Attachment Figure 4 This is a schematic diagram of the arc-extinguishing grid structure in Example 1 of the present utility model;
[0024] Attachment Figure 5 This is a schematic diagram of the exhaust port structure in Example 1 of the present utility model;
[0025] Attachment Figure 6a This is a schematic diagram of the arc extinguishing chamber partition method in Example 1 of the present utility model. Figure 1 ;
[0026] Attachment Figure 6b This is a schematic diagram of the arc extinguishing chamber partition method in Example 1 of the present utility model. Figure 2 ;
[0027] Attachment Figure 6c This is a schematic diagram of the arc extinguishing chamber partition method in Example 1 of the present utility model. Figure 3 ; DETAILED DESCRIPTION
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] Example 1
[0034] As attached Figure 1As shown in the figure, the contacts are divided into main contacts and arc contacts. When opening the circuit breaker, the arc mainly starts on the arc contact. The arc generated by the arc contact enters the arc extinguishing grid and then passes through the air duct to the outside. However, with this traditional contact system structure, the arc contact is easily broken down. The arc generated when the main contact is disconnected has no discharge channel, resulting in severe arcing, which leads to the risk of arc extinguishing failure. In order to solve this problem, as shown in the attached figure, Figure 2 and 3 As shown, this embodiment provides a contact system and an arc extinguishing chamber of a switch, wherein the contact system includes an arc contact 1 and a main contact 2. The arc extinguishing chamber 3 is divided into at least two areas. During the movement of the arc contact 1 and the main contact 2, the arc generated by the disconnection of the arc contact 1 and the main contact 2 is extinguished by the arc extinguishing grids in the corresponding area of the arc extinguishing chamber 3 and then discharged from the arc extinguishing chamber 3 through the corresponding exhaust channel.
[0035] In practice, the gas generating member is used to divide the moving area of the arcing contact 1 and the main contact 2 and the corresponding area inside the arc extinguishing chamber 3 into a space corresponding to the arcing contact 1 and a space corresponding to the main contact 2. Preferably, the gas generating member extends to the front of the rear wall of the arc extinguishing chamber 3 or abuts against the rear wall, so that the moving area of the arcing contact 1 and the main contact 2 and the corresponding area inside the arc extinguishing chamber 3 are isolated. Figure 2 and 3 As shown, specifically, a number of main contacts 2 are arranged side by side on both sides of the arc contact 1, and a pair of gas producing members 4, 4' divides the movement area of the arc contact 1 and the main contact 2 and the corresponding arc extinguishing grid 3a area in the arc extinguishing chamber 3 into a space one 5 corresponding to the arc contact 1 and a space two 6, 6' corresponding to the main contacts 2 on both sides. In this embodiment, the arc extinguishing chamber 3 includes a number of stacked arc extinguishing grids 3a, and a pair of gas producing members 4, 4' has slots corresponding to the number of stacked arc extinguishing grids 3a. The number of stacked arc extinguishing grids 3a are inserted into the slots of the pair of gas producing members 4, 4'. The pair of gas producing members 4, 4' divides the arc extinguishing grid 3a area in the arc extinguishing chamber 3 into a space one 5 corresponding to the arc contact 1 and a space two 6, 6' corresponding to the main contacts 2 on both sides. As shown in the attached figure Figure 4 As shown, protruding feet 3a01 extend from both sides of the front end of the arc extinguishing grid 3a, and the protruding feet 3a01 are respectively located in the spaces 2 6, 6', and the portion between the protruding feet 3a01 is located in the space 1 5 corresponding to the arc contact 1. In order to better allow the arc to enter the arc extinguishing chamber, an arc striking notch 1 3a0101 is provided on the protruding feet 3a01, and an arc striking notch 2 3a0102 is provided in the portion between the protruding feet 3a01 located in the space 1 5. The arc striking notch 1 3a0101 is triangular in shape to facilitate the entry of arcs with smaller diameters of each main contact, and the arc striking notch 2 3a0102 is circular in shape to facilitate the entry of arcs with larger diameters. The exhaust channel 1 3b of the space 1 5 at the rear side of the arc extinguishing chamber 3 is in a trumpet-shaped shape from the inside to the outside. As shown in the attached figure Figure 5As shown, the exhaust port 1 3b01 of the exhaust channel 1 3b of the space 1 5 at the rear side of the arc extinguishing chamber 3 is larger than the exhaust port 2 3c01 of the exhaust channel 2 3c of the space 2 6, 6' at the rear side of the arc extinguishing chamber 3. At the same time, the exhaust port 1 3b01 and the exhaust port 2 3c01 are arranged in an array. The arc generated by the arc contact 1 and the arc generated by the main contact 2 are guided by a pair of gas-generating parts 4, 4' and flow to the exhaust port 1 3b01 and the exhaust port 2 3c01. The arc generated by the arc contact 1 and the arc generated by the main contact 2 will not interfere with each other.
[0036] The arc a generated on the arcing contact 1 is discharged through the exhaust duct 3b. The bell-shaped exhaust duct 3b facilitates the flow of gas outward. The arc b generated on the main contact 2 is discharged through the exhaust duct 3c in the spaces 6 and 6' on both sides. This way, even if the arc b on the main contact 2 is large, it will not be unable to extinguish due to being confined in the original space.
[0037] It should be noted that, based on the working principle of this embodiment, the space on at least one side of the spaces 6, 6' corresponding to the main contacts 2 on both sides can be divided into at least two different spaces. Figure 6a As shown, the space on one side of the spaces 6, 6' corresponding to the main contacts 2 on both sides can be further divided into two different spaces 6a, 6b. Figure 6b As shown, the spaces on both sides of the space 2 6 , 6 ′ corresponding to the main contacts 2 on both sides can be further divided into two different spaces 6 c , 6 d , 6 c ′ 6 d ′.
[0038] Also, as attached Figure 6c As shown, the main contact 2 is located to one side of the arcing contact 1. A gas-generating element (not shown) divides the moving area of the arcing and main contacts 1 and 2, and the corresponding arc-quenching grid 3a area of the arc-quenching chamber 3, into a space 3 7 corresponding to the arcing contact 1 and a space 4 8 corresponding to the main contact 2. The space 4 8 can be further divided into at least two spaces 8a and 8b. This scenario also falls within the scope of protection of the present invention.
[0039] Example 2
[0040] Unlike Example 1, the main contact 2 is located to one side of the arcing contact 1. The arc extinguishing chamber 3 is divided into several areas, each of which has a set of independent grids. During movement, the arcing contact 1 and the main contact 2 correspond to different areas of the arc extinguishing chamber 3. The arc generated by the arcing contact 1 and the main contact 2 is extinguished by the arc extinguishing grids in the corresponding areas of the arc extinguishing chamber 3 and then discharged from the arc extinguishing chamber 3 through the corresponding exhaust channel.
[0041] Specifically, a pair of gas-generating elements 4, 4' divides the movement area of the arcing contact 1 and main contact 2, and the corresponding area within the arc extinguishing chamber 3, into space 1 5 corresponding to the arcing contact 1 and space 2 6, 6' corresponding to the two main contacts 2 on either side. Space 1 5 and space 2 6, 6' each contain a set of independent grid plates.
[0042] The present invention provides a switch contact system and a zoned arc extinguishing chamber. The contact system includes an arcing contact 1 and a main contact 2. The arc extinguishing chamber 3 is divided into at least two zones. During movement, the arcing contact 1 and the main contact 2 correspond to different zones of the arc extinguishing chamber 3. The arc generated by the arcing contact 1 and the main contact 2 is extinguished by the arc quenching grids in the corresponding zones of the arc extinguishing chamber 3 and then discharged through the corresponding exhaust ducts. The arc extinguishing chamber is divided into several zones. The arc generated when the main contacts and the arcing contacts in the contact system are extinguished by the arc quenching grids in different zones before being discharged. This prevents arc extinguishing failure, which could lead to arc failure.
[0043] 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.
[0044] 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. A switch contact system and a partitioned arc extinguishing chamber, the contact system comprising an arcing contact (1) and a main contact (2), characterized in that: The arc extinguishing chamber (3) is divided into at least two areas; the arc contact (1) and the main contact (2) correspond to different areas of the arc extinguishing chamber (3) during their movement; the arc generated by the arc contact (1) and the main contact (2) is extinguished by the arc extinguishing grids in the corresponding areas of the arc extinguishing chamber (3) and then discharged from the arc extinguishing chamber (3) through the corresponding exhaust channel.
2. A switch contact system and partitioned arc extinguishing chamber according to claim 1, characterized in that: The gas generating member divides the moving areas of the arc contact (1) and the main contact (2) and the corresponding inner area of the arc extinguishing chamber (3) into a space corresponding to the arc contact (1) and a space corresponding to the main contact (2).
3. The contact system and partitioned arc extinguishing chamber of a switch according to claim 2, characterized in that: A plurality of main contacts (2) are arranged side by side on both sides of the arc contact (1); a pair of gas generating parts (4, 4') divides the movement area of the arc contact (1) and the main contact (2) and the corresponding arc extinguishing grid (3a) area in the arc extinguishing chamber (3) into a space 1 (5) corresponding to the arc contact (1) and a space 2 (6, 6') corresponding to the main contacts (2) on both sides.
4. A switch contact system and partitioned arc extinguishing chamber according to claim 3, characterized in that: The arc extinguishing chamber (3) comprises a plurality of stacked arc extinguishing grids (3a), with protruding feet (3a01) extending from both sides of the front end of the arc extinguishing grids (3a), the protruding feet (3a01) being respectively located in the second space (6, 6'), and the portion between the protruding feet (3a01) being located in the first space (5) corresponding to the arc contact (1).
5. A switch contact system and partitioned arc extinguishing chamber according to claim 4, characterized in that: The raised legs (3a01) are provided with an arc-striking notch 1 (3a0101), and the portion between the raised legs (3a01) and located within the space 1 (5) is provided with an arc-striking notch 2 (3a0102).
6. A switch contact system and partitioned arc extinguishing chamber according to claim 5, characterized in that: The arc striking slot 1 (3a0101) is triangular, and the arc striking slot 2 (3a0102) is circular.
7. The contact system and partitioned arc extinguishing chamber of a switch according to claim 3, characterized in that: The exhaust passage (3b) of the space (5) at the rear side of the arc extinguishing chamber (3) is in a bell-mouth shape from the inside to the outside.
8. The contact system and partitioned arc extinguishing chamber of a switch according to claim 3, characterized in that: The exhaust port 1 (3b01) of the exhaust channel 1 (3b) of the space 1 (5) at the rear side of the arc extinguishing chamber (3) is larger than the exhaust port 2 (3c01) of the exhaust channel 2 (3c) of the space 2 (6, 6') at the rear side of the arc extinguishing chamber (3).
9. The contact system and partitioned arc extinguishing chamber of a switch according to claim 3, characterized in that: The space on at least one side of the second space (6, 6') corresponding to the main contacts (2) on both sides can be further divided into at least two different spaces.
10. The contact system and partitioned arc extinguishing chamber of a switch according to claim 1, characterized in that: The gas generating part 1 divides the moving area of the arc contact (1) and the main contact (2) and the arc extinguishing grid (3a) area of the corresponding arc extinguishing chamber (3) from one side of the arc contact (1) into a corresponding space 3 (7) and a space 4 (8) corresponding to the main contact (2) on one side, and the space 4 (8) can be further divided into at least two spaces.
11. The contact system and partitioned arc extinguishing chamber of a switch according to claim 3, characterized in that: A plurality of main contacts (2) are arranged side by side on both sides of the arc contact (1); a pair of gas generating parts (4, 4') divides the movement area of the arc contact (1) and the main contact (2) and the corresponding area inside the arc extinguishing chamber (3) into a space one (5) corresponding to the arc contact (1) and a space two (6, 6') corresponding to the main contacts (2) on both sides; each of the space one (5) and the space two (6, 6') has at least one group of independent grid plates.
12. The contact system and partitioned arc extinguishing chamber of a switch according to claim 3, characterized in that: The gas generating member extends to the front of the rear wall of the arc extinguishing chamber (3) or abuts against the rear wall, so that the movement areas of the arc contact (1) and the main contact (2) and the corresponding areas in the arc extinguishing chamber (3) are isolated.