Arc extinguishing system and frame circuit breaker
By dividing multiple isolated arc extinguishing areas in the arc extinguishing chamber of the frame circuit breaker, and combining the design of insulated gas-producing partitions and moving contact groups, the problem of insufficient arc extinguishing ability in the prior art is solved, which significantly improves the The arc extinguishing efficiency is achieved and the main contact breakdown is avoided.
Patent Information
- Application Number
- CN202420119111.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-01-17
AI Technical Summary
When the existing frame circuit breakers operate under high voltage and high current, the arc energy is large and the arc extinguishing capacity of the arc extinguishing chamber is insufficient, resulting in low arc extinguishing efficiency and difficulty in extinguishing. The distance between the moving contacts and the arc-induced plate is large, and the arc is The arc root is not easy to transfer to the arc-induced plate.
An arc extinguishing system is designed. The arc extinguishing chamber can be divided into at least three arc extinguishing areas that are isolated from each other, corresponding to the arc contact area and the main contact area of the moving contact group, and adjacent extinguishing is isolated by an insulated gas-producing partition. In the arc area, the moving contact group includes an arc contact area and a main contact area, and the main contact area is located on both sides of the arc contact area.
It effectively improves the arc extinguishing effect, avoids breakdown of the main contact due to inability to extinguish the arc, and enhances the overall arc extinguishing ability of the arc extinguishing system.
Smart Images
Figure CN222507513U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an arc extinguishing system and a frame circuit breaker. Background Art
[0002] In the current low-voltage electrical appliance field, the DC voltage can only reach DC1500V. According to the latest low-voltage electrical appliance industry standard development plan, the voltage will develop to AC2000V, DC3000V. In the market, some customers have proposed the demand for low-voltage electrical appliances of DC2000~DC2500V. The existing DC1500V products can no longer meet the needs of customers and are in urgent need of replacement.
[0003] The frame circuit breaker includes a static contact and a moving contact arranged roughly vertically, and an arc extinguishing chamber arranged in front of the moving contact. The moving contact is composed of a group of contact plates of the same specification connected in parallel, and the contact part of the static contact is an integral plane structure. The arc extinguishing chamber includes an arc extinguishing grid, and arc striking plates are provided at both ends of the arc extinguishing grid. In this conventional structure, the structure of the moving and static contact system and the arc extinguishing chamber is relatively simple, and the defects are relatively obvious: when the circuit breaker works under high voltage and high current, the arc energy is large, and the arc extinguishing capacity of the arc extinguishing chamber is insufficient, resulting in low arc extinguishing efficiency and difficulty in extinguishing the arc; there is a certain distance between the moving contact and the arc striking plate, and the arc root of the arc on the moving contact is not easy to transfer to the arc striking plate. Utility Model Content
[0004] The purpose of the present application is to provide an arc extinguishing system and a frame circuit breaker to improve the arc extinguishing effect in view of the deficiencies in the above-mentioned prior art.
[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
[0006] According to one aspect of an embodiment of the present application, an arc extinguishing system is provided, including an arc extinguishing chamber, wherein a moving contact group and a static contact that cooperate with each other are arranged on one side of the arc extinguishing chamber, and the moving contact group is divided into an arc contact zone and a main contact zone respectively located on both sides of the arc contact zone, and the arc extinguishing chamber includes at least three mutually isolated arc extinguishing zones, the arc extinguishing zone located in the middle corresponds to the arc contact zone, and the arc extinguishing zones located on both sides correspond to the main contact zones on both sides.
[0007] Optionally, an insulating gas generating baffle is provided between two adjacent arc extinguishing zones to isolate the two adjacent arc extinguishing zones.
[0008] Optionally, a plurality of notches are formed on one end of the insulating gas generating baffle toward the arc extinguishing chamber, and an arrangement direction of the plurality of notches is the same as an arrangement direction of a plurality of grids of the arc extinguishing chamber, so as to be engaged and fixed with the plurality of grids.
[0009] Optionally, one end of the insulating gas generating baffle extends into the moving contact group, and the other end extends into the inlet of the arc extinguishing chamber.
[0010] Optionally, the moving contact group includes a plurality of moving contacts arranged side by side, and an arrangement direction of the plurality of moving contacts is perpendicular to an arrangement direction of a plurality of grids of the arc extinguishing chamber.
[0011] Optionally, the arc extinguishing chamber is provided with a movable arc-striking grid, and the movable arc-striking grid forms a plurality of lead angles extending toward the moving contact group, and the plurality of lead angles correspond one-to-one to the main contact area and the arc contact area.
[0012] Optionally, the arc extinguishing chamber is provided with a static arc-striking grid, the static arc-striking grid forms a plurality of lead angles extending toward the static contact, and the plurality of lead angles of the static arc-striking grid respectively correspond one-to-one to the plurality of lead angles of the dynamic arc-striking grid.
[0013] Optionally, a plurality of buckles are formed on the top of the insulating gas-generating baffle toward the arc-extinguishing chamber, and corresponding buckles are formed on the surface of the movable arc-striking grid.
[0014] Optionally, the arc extinguishing chamber is formed with an odd number of arc extinguishing zones, the arc extinguishing zone located in the middle corresponds to the arc contact zone, and the arc extinguishing zones located on both sides correspond to the main contact zones on both sides.
[0015] According to one aspect of an embodiment of the present application, a frame circuit breaker is provided, comprising the above-mentioned arc extinguishing system.
[0016] The beneficial effects of this application include:
[0017] The present application provides an arc extinguishing system, wherein the arc extinguishing chamber can be divided into at least three mutually isolated arc extinguishing zones, wherein at least three arc extinguishing zones correspond to the arc contact zone and the main contact zone of the moving contact group, respectively, wherein the main contact zone is located on both sides of the arc contact zone; when extinguishing the arc, the main contacts located in the main contact zones on both sides first leave the corresponding static main contacts, and the arc contacts located in the middle arc contact zone are then lifted up and leave the corresponding static arc contacts, and then an arc is generated between the arc contacts. As the moving contact opens, the arc of the arc contact is transferred to the arc extinguishing zone corresponding to the arc contact zone, and then the arc is extinguished through the grid. When the arc is transferred to the main contacts in the main contact zones on both sides, the arc of the main contact is transferred to the arc extinguishing zones on both sides corresponding to the main contact zone for arc extinguishing, so that the arcs generated by the arc contact and the main contact can be extinguished through the arc extinguishing chamber, which can effectively avoid the situation where the main contact is unable to extinguish the arc and causes the main contact to break down, and at the same time, the setting that both the main contact and the arc contact can extinguish the arc also improves the overall arc extinguishing effect of the arc extinguishing system. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 One of the structural schematic diagrams of an arc extinguishing system provided in an embodiment of the present application;
[0020] Figure 2 A second structural schematic diagram of an arc extinguishing system provided in an embodiment of the present application;
[0021] Figure 3 A third structural diagram of an arc extinguishing system provided in an embodiment of the present application;
[0022] Figure 4 One of the schematic diagrams of the structure of an insulating gas-generating baffle of an arc-extinguishing system provided in an embodiment of the present application;
[0023] Figure 5 A second schematic diagram of the structure of an insulating gas-generating baffle of an arc-extinguishing system provided in an embodiment of the present application;
[0024] Figure 6 A schematic diagram of the engagement of an insulating gas generating baffle and an arc extinguishing chamber of an arc extinguishing system provided in an embodiment of the present application.
[0025] Icon: 10-arc extinguishing chamber; 10a-lead angle; 11-moving arc-striking grid; 12-static arc-striking grid; 20-moving contact group; 20a-moving contact; 21-arcing contact area; 22-main contact area; 30-static contact; 40-insulating gas-generating baffle; 40a-slot. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0032] When the moving contact opens away from the static contact, the arc generated is extinguished by the grid. For the frame circuit breaker, the moving contact can be divided into arc contact and main contact. The main contact is generally arranged on both sides of the arc contact. During the opening process of the moving contact, the main contacts on both sides first leave the static main contact, and then the arc contact is lifted and leaves the static arc contact. At this time, the arc is generated between the arc contacts. As the moving contact opens, the arc will be transferred to the arc extinguishing chamber and extinguished by the grid. However, due to the high rated voltage and current, when the arc is transferred to the arc extinguishing chamber, there is a high probability that the arc will be transferred to the main contacts and cause the main contacts to break down.
[0033] In order to solve the above problems, one aspect of the embodiment of the present application provides an arc extinguishing system, which can avoid the above phenomenon and transfer the arc to the arc extinguishing chamber 10 once the contact breakdown occurs. Figure 1 to Figure 3The arc extinguishing system provided in the embodiment of the present application includes an arc extinguishing chamber 10, and a moving contact group 20 and a static contact 30 that cooperate with each other are arranged on one side of the arc extinguishing chamber 10. The moving contact group 20 is divided into an arc contact area 21 and main contact areas 22 respectively located on both sides of the arc contact area 21. The arc extinguishing chamber 10 includes at least three arc extinguishing areas isolated from each other, the arc extinguishing area in the middle corresponds to the arc contact area 21, and the arc extinguishing areas located on both sides correspond to the main contact areas 22 on both sides.
[0034] The moving contact group 20 includes a plurality of moving contacts 20a arranged in sequence. The moving contacts 20a may be arc contacts or main contacts. For example, Figure 1 There are two mid-arc contacts, forming an arc contact area 21 located in the middle; the two sides of the arc contact area 21 are main contact areas 22 respectively, and each main contact area 22 has four main contacts.
[0035] The moving contact group 20 is located above the stationary contact 30. The stationary contact 30 is a planar structure. The plurality of moving contacts 20a cooperate with the stationary contact 30 to complete closing or opening.
[0036] An arc extinguishing chamber 10 is arranged on one side of the moving contact group 20 and the static contact 30. The arc extinguishing chamber 10 can be divided into at least three arc extinguishing zones according to the arc contact zone 21 and the main contact zone 22. The at least three arc extinguishing zones are isolated from each other; among them, the arc extinguishing zone in the middle corresponds to the arc contact zone 21 in the middle, and the arc extinguishing zones on both sides correspond to the main contact zones 22 on both sides respectively.
[0037] Furthermore, the arc extinguishing chamber 10 is formed with an odd number of arc extinguishing zones, the arc extinguishing zone in the middle corresponds to the arc contact zone 21 , and the arc extinguishing zones on both sides correspond to the main contact zones 22 on both sides.
[0038] The number of arc extinguishing zones can be more than three, for example, five, seven, etc., and the number of arc extinguishing zones is an odd number. In this way, an arc extinguishing zone located in the middle corresponding to the arc contact zone 21 and arc extinguishing zones located on both sides corresponding to the main contact zone 22 can be formed.
[0039] When there are an even number of main contact zones 22, two by two are arranged in groups on both sides of the arc contact zone 21; accordingly, an arc extinguishing zone in the middle corresponding to the arc contact zone 21 in the middle and multiple arc extinguishing zones on both sides corresponding to the multiple main contact zones 22 on both sides are formed. The arc contact zone 21 and each main contact zone 22 correspond to one arc extinguishing zone respectively.
[0040] When extinguishing the arc, the main contacts on both sides first leave the corresponding static main contacts, and then the arc contacts are lifted and leave the corresponding static arc contacts. At this time, an arc is generated between the arc contacts. As the moving contact 20a opens, the arc of the arc contact will be transferred to the arc extinguishing zone corresponding to the arc contact, and the arc will be extinguished through the grid. After the rated voltage is increased, the arc of the arc contact may be transferred to the main contacts. If the arc is transferred to the main contact, the arc of the main contact can also be transferred to the arc extinguishing zone corresponding to the main contact for arc extinguishing, avoiding the main contact breakdown and causing continuous arcing, while improving the arc extinguishing effect.
[0041] Therefore, in the arc extinguishing system provided in the embodiment of the present application, the arc extinguishing chamber 10 can be divided into at least three mutually isolated arc extinguishing zones, and the at least three arc extinguishing zones correspond to the arc contact zone 21 and the main contact zone 22 of the moving contact group 20, respectively, wherein the main contact zone 22 is located on both sides of the arc contact zone 21; when extinguishing the arc, the main contacts located in the main contact zones 22 on both sides first leave the corresponding static main contacts, and the arc contacts located in the middle arc contact zone 21 are then lifted and leave the corresponding static arc contacts, and an arc is generated between the arc contacts. As the moving contact 20a opens, the arc of the arc contact is transferred to the arc extinguishing zone corresponding to the arc contact zone 21, and then the arc is extinguished through the grid. When the arc is transferred to the main contacts of the main contact area 22 on both sides, the arc of the main contact is transferred to the arc extinguishing areas on both sides corresponding to the main contact area 22 for arc extinguishing. In this way, the arcs generated by the arc contact and the main contact can be extinguished through the arc extinguishing chamber 10, which can effectively avoid the situation where the main contact is broken down due to the inability to extinguish the arc. At the same time, the setting that both the main contact and the arc contact can extinguish the arc also improves the overall arc extinguishing effect of the arc extinguishing system.
[0042] Furthermore, an insulating gas generating baffle 40 is provided between two adjacent arc extinguishing zones to isolate the two adjacent arc extinguishing zones.
[0043] The multiple arc extinguishing zones are isolated from each other. The present application achieves the purpose of isolating two adjacent arc extinguishing zones by providing an insulating gas generating partition 40 between two adjacent arc extinguishing zones.
[0044] The insulating gas generating baffle 40 can isolate the arcs in two adjacent arc extinguishing zones. Meanwhile, the narrow gap formed between the insulating gas generating baffle 40 and the adjacent moving contact 20a can compress the arc and press the arc into the corresponding arc extinguishing zone for arc extinguishing.
[0045] For example, in the present application, one arc contact zone 21 and two main contact zones 22 are provided, and accordingly, two insulating gas generating baffles 40 are provided to separate the arc extinguishing chamber 10 into three arc extinguishing zones.
[0046] The arrangement direction of the two insulating gas generating baffles 40 is the same as the arrangement direction of the multiple moving contacts 20a. Figure 1 In the front-to-back direction, one end of the insulating gas generating baffle 40 extends into the moving contact group 20, and the other end extends into the inlet of the arc extinguishing chamber 10.
[0047] The insulating gas generating partition 40 extending into the moving contact group 20 divides the multiple moving contacts 20a into an arc contact area 21 and a main contact area 22, and the insulating gas generating partition 40 extending into the inlet of the arc extinguishing chamber 10 divides the arc extinguishing chamber 10 into corresponding arc extinguishing areas.
[0048] Among them, Figure 4 , Figure 5 As shown, a plurality of notches 40a are formed at one end of the insulating gas generating baffle 40 facing the arc extinguishing chamber 10, and the arrangement direction of the plurality of notches 40a is the same as the arrangement direction of the plurality of grids of the arc extinguishing chamber 10, so as to be engaged and fixed with the plurality of grids.
[0049] A plurality of grids are formed in the arc extinguishing chamber 10, and arc extinguishing is performed through the grids. Figure 1 Multiple grids are stacked and arranged in the up-down direction, and multiple slots 40a formed by the ports of the insulating gas-producing baffle 40 are also arranged in the up-down direction, so that the insulating gas-producing baffle 40 can be inserted into the gap of the grid through the slots 40a to fix the insulating gas-producing baffle 40 and the arc extinguishing chamber 10.
[0050] For example, the insulating gas-producing baffle 40 has a fixing effect by extending from the head to the tail to the square notch above the grid.
[0051] Figure 6 In the embodiment, a plurality of notches 40a are formed on the side of the insulating gas producing baffle 40 facing the arc extinguishing chamber 10, and gaps are also formed between the plurality of grids of the arc extinguishing chamber 10, and the notches 40a of the insulating gas producing baffle 40 and the gaps of the arc extinguishing chamber 10 are adapted to fit together.
[0052] Furthermore, a plurality of buckles are formed on the top of the insulating gas-producing baffle 40 toward the arc-extinguishing chamber 10, and corresponding slots are formed on the surface of the movable arc-striking grid 11, so that the insulating gas-producing baffle 40 and the arc-extinguishing chamber 10 are engaged and fixed by the engagement of the buckles and the slots.
[0053] The moving contact group 20 includes a plurality of moving contacts 20 a arranged side by side, and an arrangement direction of the plurality of moving contacts 20 a is perpendicular to an arrangement direction of the plurality of grids of the arc extinguishing chamber 10 .
[0054] Figure 1 The plurality of moving contacts 20a are arranged along the left-right direction, and the plurality of grid sheets are arranged along the up-down direction.
[0055] The arc extinguishing chamber 10 is provided with a moving arc-striking grid 11 and a static arc-striking grid 12 ; wherein the moving arc-striking grid 11 is located above the arc extinguishing chamber 10 to correspond to the moving contact group 20 ; the static arc-striking grid 12 is located below the arc extinguishing chamber 10 to correspond to the static contact 30 .
[0056] The movable arc-striking grid 11 forms a plurality of lead angles 10a extending toward the movable contact group 20, and the plurality of lead angles 10a correspond one-to-one with the main contact area 22 and the arc contact area 21. When the movable arc-striking grid 11 forms n lead angles 10a, the n lead angles 10a correspond one-to-one with the main contact area 22 and the arc contact area 21.
[0057] The static arc-striking grid 12 forms a plurality of lead angles 10a extending toward the static contact 30, and the plurality of lead angles 10a of the static arc-striking grid 12 correspond one-to-one to the plurality of lead angles 10a of the moving arc-striking grid 11. When the static arc-striking grid 12 forms n lead angles 10a, the n lead angles 10a of the static arc-striking grid 12 correspond one-to-one to the n lead angles 10a of the moving arc-striking grid 11.
[0058] In summary, the arc extinguishing system of the present application divides the arc extinguishing chamber 10 into multiple arc extinguishing zones by providing an insulating gas producing baffle 40, so that the product can be operated at a higher rated voltage. Without changing other parts, by adding an insulating gas producing baffle 40, the arc contact and the main contacts on both sides can be arc extinguished, thereby avoiding the generation of an arc between the main contacts and causing continuous arcing.
[0059] On this basis, an embodiment of the present application further discloses a frame circuit breaker, comprising an arc extinguishing system as described above.
[0060] The frame circuit breaker includes the same structure and beneficial effects as the arc extinguishing system in the aforementioned embodiment. The structure and beneficial effects of the arc extinguishing system have been described in detail in the aforementioned embodiment, and will not be repeated here.
[0061] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An arc extinguishing system, characterized in that: The invention comprises an arc extinguishing chamber (10), wherein a movable contact group (20) and a stationary contact (30) which cooperate with each other are arranged on one side of the arc extinguishing chamber (10), wherein the movable contact group (20) is divided into an arc contact area (21) and main contact areas (22) respectively located on both sides of the arc contact area (21), and the arc extinguishing chamber (10) comprises at least three mutually isolated arc extinguishing areas, wherein the arc extinguishing area located in the middle corresponds to the arc contact area (21), and the arc extinguishing areas located on both sides correspond to the main contact areas (22) on both sides.
2. The arc extinguishing system according to claim 1, characterized in that: An insulating gas generating partition (40) is arranged between two adjacent arc extinguishing zones to isolate the two adjacent arc extinguishing zones.
3. The arc extinguishing system according to claim 2, characterized in that: The insulating gas generating baffle (40) forms a plurality of notches (40a) at one end facing the arc extinguishing chamber (10), and the arrangement direction of the plurality of notches (40a) is the same as the arrangement direction of the plurality of grid plates of the arc extinguishing chamber (10), so as to be engaged and fixed with the plurality of grid plates.
4. The arc extinguishing system according to claim 3, characterized in that: One end of the insulating gas generating baffle (40) extends into the moving contact group (20), and the other end extends into the inlet of the arc extinguishing chamber (10).
5. The arc extinguishing system according to claim 2, characterized in that: The moving contact group (20) comprises a plurality of moving contacts (20a) arranged side by side, and the arrangement direction of the plurality of moving contacts (20a) is perpendicular to the arrangement direction of the plurality of grid plates of the arc extinguishing chamber (10).
6. The arc extinguishing system according to claim 5, characterized in that: The arc extinguishing chamber (10) is provided with a movable arc-striking grid (11), the movable arc-striking grid (11) forms a plurality of lead angles (10a) extending toward the movable contact group (20), and the plurality of lead angles (10a) correspond one-to-one to the main contact area (22) and the arc contact area (21).
7. The arc extinguishing system according to claim 6, characterized in that: The arc extinguishing chamber (10) is provided with a static arc-striking grid (12), the static arc-striking grid (12) forms a plurality of lead angles (10a) extending toward the static contact (30), and the plurality of lead angles (10a) of the static arc-striking grid (12) respectively correspond one-to-one to the plurality of lead angles (10a) of the moving arc-striking grid (11).
8. The arc extinguishing system according to claim 6, characterized in that: A plurality of buckles are formed on the top of the insulating gas generating baffle (40) toward the arc extinguishing chamber (10), and corresponding buckles are formed on the surface of the movable arc striking grid (11).
9. The arc extinguishing system according to any one of claims 1 to 8, characterized in that: The arc extinguishing chamber (10) is formed with an odd number of arc extinguishing zones.
10. A frame circuit breaker, characterized in that: The invention comprises an arc extinguishing system as claimed in any one of claims 1 to 9.