Frame circuit breaker layout structure

Abstract

The utility model belongs to the technical field of frame circuit breakers, and particularly discloses a frame circuit breaker layout structure which comprises a plurality of arc extinguishing cavities and a plurality of current-carrying cavities, the arc extinguishing cavities and the current-carrying cavities are distributed side by side in any order in the horizontal direction, arc extinguishing systems are installed in the arc extinguishing cavities, and current-carrying systems are installed in the current-carrying cavities. The space utilization rate of an arc extinguishing system is improved, more arc extinguishing grid sheets are arranged, and the breaking performance is improved; the improvement of the commutation reliability between the arc contacts is the premise of ensuring successful breaking; a current-carrying system is separated from an arc extinguishing system, so that mutual interference and influence among different systems are reduced or avoided; the air fluidity of the current-carrying cavity is improved, and the over-high temperature rise is reduced.

Description

Technical Field

[0001] This utility model relates to the field of frame circuit breaker technology, and in particular to a frame circuit breaker layout structure. Background Technology

[0002] The current layout of traditional frame-type circuit breaker arc extinguishing systems, such as Figure 1 As shown, the arc-extinguishing system is located above the current-carrying system. Figure 1 The dashed box in the image represents the arc-extinguishing cavity. This layout has the following drawbacks:

[0003] 1. First, because the circuit breaker has a large current carrying capacity, it requires a large moving and stationary contact system, which will occupy a large volume and space in the overall circuit breaker, resulting in a relatively small usable arc extinguishing space.

[0004] 2. Secondly, due to the shape of the moving and stationary contacts and the relationship between the base and the bottom plate, the space available for arc extinguishing is often nearly cubic in shape, which is not conducive to the arc extinguishing grids being arranged in a long strip in the direction of cutting the arc. The number of arc extinguishing grids that can be arranged in the improved series arc extinguishing scheme is also limited. Ultimately, this is caused by the unreasonable shape of the arc extinguishing space.

[0005] 3. Furthermore, to ensure the reliability of the contact between the active and stationary contacts, an arc-shaped moving and stationary contact structure is often used to generate an electric arc between them, replacing the arc-induced erosion of the active and stationary contacts and ensuring reliable contact. Traditional arc-shaped contacts typically consist of one or more extended active contact pieces that close before the active and stationary contacts and open after the moving and stationary contacts during the closing process, ensuring that the arc is always generated between the arc-shaped and stationary contacts. However, the extended arc-shaped contact often significantly affects the airtightness of the arc-extinguishing system during its movement, easily causing difficulties in arc transfer and resulting in disconnection failure. Moreover, the arc-shaped contact moves with the active contact, which can lead to unreliable current commutation between the main and arc-shaped contacts, easily causing an arc to be generated between the active and stationary contacts, resulting in erosion and ultimately connection / disconnection failure.

[0006] 4. Furthermore, in traditional active and static contact current-carrying cavities and arc-extinguishing systems, the environment within the cavity is complex after multiple breaks, with many uncontrollable factors. Different systems are prone to mutual interference, meaning that problems with the arc-extinguishing system can have unnecessary impacts on the current-carrying system, or vice versa.

[0007] 5. Finally, since the main and moving / stationary contact current-carrying systems and the arc-extinguishing system share a single cavity, and the sealing of the arc-extinguishing system often leads to a large temperature rise inside the cavity.

[0008] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those skilled in the art. Content of the present application

[0009] The purpose of the present application is to solve the technical problems existing in the background art, and therefore a frame circuit breaker layout structure is provided.

[0010] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0011] The frame circuit breaker is composed of a mechanical system, an arc extinguishing system one, an arc extinguishing system two, a current carrying system one and a current carrying system two. The functions of the current carrying system one and the current carrying system two are mainly realized by the connection and disconnection of the active and static contacts to connect or disconnect the main circuit. The functions of the arc extinguishing system one and the arc extinguishing system two are mainly realized by the arc movement of the arc dynamic and static contacts compared with the active and static contacts to carry the arc function, so that the arc can be extinguished in the arc extinguishing system one and two. The mechanical system mainly realizes the functions of storing and releasing energy through the movement of various connecting rods to drive the active contact to realize the functions of closing and opening, which is consistent with the traditional frame circuit breaker. The commutation function is realized by the first closing and the later opening of the arc dynamic and static contacts in the arc extinguishing system to switch the current between the arc dynamic and static contacts and the active and static contacts. When closing, the arc dynamic and static contacts are first contacted, which inevitably causes the arc between the arc dynamic and static contacts, and the current mainly flows through the arc dynamic and static contacts. When the active and static contacts are connected, the arc dynamic and static contacts are disconnected, realizing the switching of the current. Similarly, when opening, the current is carried by the arc dynamic and static contacts only, realizing the transfer of the current. Since the arc dynamic and static contacts are disconnected later, the arc between the arc dynamic and static contacts is inevitably caused.

[0012] The current carrying system and the arc extinguishing system are arranged in different cavities, i.e. the arc extinguishing system is installed in the arc extinguishing cavity and the current carrying system is installed in the current carrying cavity. The arc extinguishing cavity and the current carrying cavity are separated by a rib plate. The mechanical system is installed in the mechanical cavity, and the mechanical cavity is arranged in a vertical direction above and below the arc extinguishing cavity and the current carrying cavity distributed in parallel.

[0013] When there are 2 arc extinguishing cavities and 2 current carrying cavities, the 2 arc extinguishing cavities and the 2 current carrying cavities are distributed in parallel in any order in the horizontal direction, and then 6 layout modes can be arranged. The top of the arc extinguishing cavity and the current carrying cavity distributed in parallel in the horizontal direction is flush. The bottom of the arc extinguishing cavity and the current carrying cavity distributed in parallel in the horizontal direction is flush.

[0014] When the top of the arc extinguishing cavity and the top of the current carrying cavity are not flush, that is, the arc extinguishing cavity has a certain space on the upper part of the current carrying cavity, the arc extinguishing cavity on the upper part of the current carrying cavity is connected with the closest arc extinguishing cavity in the side-by-side distribution of the corresponding current carrying cavity, forming an L-shaped arc extinguishing cavity, and then two layout modes can be arranged. On the basis of the structure, the layout combination between two arc extinguishing cavities and m current carrying cavities, or the layout combination between n arc extinguishing cavities and two current carrying cavities can be carried out.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] 1. Improve the space utilization of the arc extinguishing system, arrange more arc extinguishing grid plates, and improve the breaking performance;

[0017] 2. Improve the reliability of current conversion between arc contacts, which is a prerequisite for successful breaking;

[0018] 3. The current carrying system and the arc extinguishing system are separated, reducing or avoiding mutual interference and influence between different systems;

[0019] 4. Improve the air flow of the current carrying cavity and reduce the high temperature rise.

[0020] The utility model will be further described below in combination with the drawings and examples. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art will be simply introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a schematic diagram of the frame circuit breaker layout structure of the prior art;

[0023] Figure 2 It is a schematic diagram of the frame circuit breaker three-dimensional structure of the utility model;

[0024] Figure 3 It is a schematic diagram of the frame circuit breaker front view structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the frame circuit breaker internal front view structure of the utility model;

[0026] Figure 5 It is a schematic diagram of the frame circuit breaker internal three-dimensional structure of the utility model;

[0027] Figure 6 is a frame circuit breaker internal side view structure schematic diagram of the utility model;

[0028] Figure 7 is a frame circuit breaker internal part structure schematic diagram of the utility model;

[0029] Figure 8 is Figure 7 side view structure schematic diagram of the utility model;

[0030] Figure 9 is the arrangement position schematic diagram of 2 arc extinguishing cavities and 2 current carrying cavities of the utility model;

[0031] Figure 10 is the arrangement position schematic diagram of 2 arc extinguishing cavities and 2 current carrying cavities of the utility model;

[0032] Figure 11 (a) is the arrangement position schematic diagram of 2 arc extinguishing cavities and m current carrying cavities of the utility model, Figure 11 (b) is the arrangement position schematic diagram of n arc extinguishing cavities and 2 current carrying cavities of the utility model.

[0033] Reference signs: 1, arc extinguishing cavity;101, arc extinguishing cavity one;102, arc extinguishing cavity two;2, base;3, driving contact;4, bottom plate;5, static contact terminal;6, dynamic contact terminal;7, arc extinguishing system one;8, arc extinguishing system two;9, current carrying system one;10, current carrying system two;11, face shield;12, mechanical system;1301, current conversion wire one;1302, current conversion wire two;1303, current conversion wire three;1304, current conversion wire four;14, fixed bolt;15, dynamic contact;16, electric arc one;17, electric arc two;18, arc extinguishing system shell;19, dynamic arc starting sheet;20, main shaft;21, connecting rod;22, rotating shaft;23, arc contact;24, upper air outlet;25, lower air outlet;26, arc jump. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.

[0035] In the description of the utility model, need understanding is, the term "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the restriction of the utility model.

[0036] In the description of the utility model, need understanding is, the term "one", "two" is only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying indicating the number of technical features indicated. Therefore, the features limited by "one", "two" can explicitly or implicitly include at least one feature.

[0037] In the embodiments of the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; It can be mechanical connection, or electrical connection; It can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0038] The overall layout of the frame circuit breaker is as follows Figure 2 and 3As shown, the frame circuit breaker is composed of mechanical system 12, arc extinguishing system 1 7, arc extinguishing system 2 8, current carrying system 1 9, current carrying system 2 10, base 2, bottom plate 4, face shield 1 1 and so on. The functions of current carrying system 1 9 and current carrying system 2 10 are mainly realized by the connection and disconnection of the active and static contacts to connect or disconnect the main circuit. The functions of arc extinguishing system 1 7 and arc extinguishing system 2 8 are mainly realized by the arc movement of the arc contacts and the earlier closing and later opening of the arc contacts compared with the active and static contacts to carry the arc, so that the arc can be extinguished in arc extinguishing system 1 7 and arc extinguishing system 2 8. The mechanical system 12 mainly realizes the functions of storing and releasing energy by the movement of various connecting rods 21 to drive the active contact 1 5 to realize the functions of closing and opening. This part is consistent with the traditional frame circuit breaker. The commutation function is realized by the earlier closing and later opening of the arc contacts to switch the current between the arc contacts and the active and static contacts. When closing, the arc is generated between the arc contacts due to the earlier contact of the arc contacts, and the current mainly flows through the arc contacts. When the active and static contacts are connected, the arc contacts are disconnected to realize the switching of the current. Similarly, when opening, the current is carried by the arc contacts instead of the active and static contacts to realize the transfer of the current. Since the arc contacts are disconnected later, the arc is generated between the arc contacts.

[0039] As shown in FIGS. Figure 4 , 5 and 6, the internal structure of the frame circuit breaker includes arc extinguishing cavity 1 01, arc extinguishing cavity 2 1 02, current carrying cavity 1, current carrying cavity 2, commutation wire 1 301, commutation wire 2 1 302, commutation wire 3 1 303, commutation wire 4 1 304, static contact, active contact 1 5, static contact terminal 5, active contact terminal 6, arc runner 1 9, main shaft 20, connecting rod 21, rotating shaft 22, arc contact 23 and so on.

[0040] The current carrying system and the arc extinguishing system are arranged in different cavities, i.e. the arc extinguishing system is installed in the arc extinguishing cavity 1 and the current carrying system is installed in the current carrying cavity. The arc extinguishing cavity 1 and the current carrying cavity are separated by a rib plate. The mechanical system 1 2 is installed in the mechanical cavity, and the mechanical cavity is arranged in a vertical direction above and below the arc extinguishing cavity 1 and the current carrying cavity which are arranged side by side.

[0041] As shown in FIGS. Figure 9 A and M represent the arrangement positions of the arc extinguishing cavity 1 and the current carrying cavity, respectively. When there are 2 arc extinguishing cavities 1 and 2 current carrying cavities, the 2 arc extinguishing cavities 1 and the 2 current carrying cavities are arranged side by side in any order in a horizontal direction, and 6 layout modes can be arranged. The top of the arc extinguishing cavity 1 and the current carrying cavity arranged side by side in the horizontal direction is flush. The bottom of the arc extinguishing cavity 1 and the current carrying cavity arranged side by side in the horizontal direction is flush.

[0042] As Figure 10 shown, the original arc-extinguishing chamber part in the upper part of the current-carrying cavity in the prior art frame circuit breaker is vacant, and under certain conditions, it can also be used for arranging the arc-extinguishing system, that is, when the top of the arc-extinguishing cavity 1 and the current-carrying cavity are not flush, that is, the arc-extinguishing cavity 1 has a certain space in the upper part of the current-carrying cavity, the arc-extinguishing cavity 1 in the upper part of the current-carrying cavity is connected with the closest arc-extinguishing cavity 1 arranged side by side, forming an L-shaped arc-extinguishing cavity 1, and then two layout modes can be arranged.

[0043] As Figure 11 shown, on the basis of the structure, Figure 10 , applied to n arc-extinguishing cavities 1 and m current-carrying cavities, the layout combination between two arc-extinguishing cavities 1 and m current-carrying cavities can be carried out, or the layout combination between n arc-extinguishing cavities 1 and two current-carrying cavities can be carried out.

[0044] Because the arc-extinguishing system of the utility model is different from the traditional scheme in layout, the original arc-extinguishing chamber region presents a vacant state (or an exhaust port is formed at the top and bottom of the arc-extinguishing cavity 1), which can relatively easily form air convection with the outside, which is greatly beneficial to reducing the temperature rise problem of the movable and static contacts caused by current carrying.

[0045] Therefore, based on the layout structure between the current-carrying system and the arc-extinguishing system, the structure of the arc-extinguishing system and the current-carrying system is changed correspondingly:

[0046] As Figure 6 shown, a plurality of arc-extinguishing vanes, arc contacts 23 and movable arc-inducing pieces 19 are installed in the arc-extinguishing cavity 1; and the commutation conductor is threaded through the arc-extinguishing cavity 1 and the current-carrying cavity, so that one end of the commutation conductor 1301 is in the arc-extinguishing cavity 1 and in contact with the arc contact 23, and the other end is in the current-carrying cavity and connected with the static contact. The rotating shaft 22 is threaded through the arc-extinguishing cavity 1 and the current-carrying cavity, and the arc contact 23 is installed on the rotating shaft 22 and rotates therewith.

[0047] The static contact terminal 5, the static contact, the movable contact 15 and the movable contact terminal 6 are installed in the current-carrying cavity. The movable contact 15 is installed on the rotating shaft 22 and rotates therewith.

[0048] When the circuit breaker is opened, the arc is generated at the position of the arc contact 23 in the arc extinguishing system, the arc one 16 is generated in the arc extinguishing system one 7, and the arc two 17 is generated in the arc extinguishing system two 8, and the arc extinguishing current path is: the incoming line, the static contact terminal 5 of the current carrying system one 9, the static contact of the current carrying system one 9, the fourth current conducting wire 1304, the arc one 16, the arc extinguishing grid, the moving arc blade 19, the third current conducting wire 1303, the moving contact terminal 6 of the current carrying system one 9, the moving contact terminal 6 of the current carrying system two 10, the first current conducting wire 1301, the moving arc blade 19, the arc extinguishing grid, the arc two 17, the second current conducting wire 1302, the static contact of the current carrying system two 10, the static contact terminal 5 of the current carrying system two 10, and the outgoing line. Therefore, the arc extinguishing task of the circuit is realized in the arc extinguishing system one 7 and the arc extinguishing system two 8.

[0049] An upper air outlet 24 is formed at the top of the arc extinguishing cavity 1, and a lower air outlet 25 is formed at the bottom of the arc extinguishing cavity 1. The opening and closing movement of the arc contact 23 and the rotation angle are realized by the cooperation of the main shaft 20, the connecting rod 21 and the rotating shaft 22.

[0050] The arc extinguishing system is fixed on the base 2 by the fixing bolt 14, and at the same time, the current conducting wires are connected with the moving arc blade 19 of the arc extinguishing system by the fixing bolt 14 to form a current conducting path.

[0051] As shown in Figs. Figure 7 and 8 The arc jump 26 structure is designed between the current conducting wire and the moving contact 15 to realize the current conversion. When the circuit breaker is opened, the moving contact 15 is opened to contact the current conducting wire to generate the arc jump 26 to realize the current conversion and is faster than the opening of the arc contact 23, and therefore, the arc is generated at the position of the arc contact 23 in the arc extinguishing system.

[0052] The above description is only the preferred embodiment of the present application, and does not limit the present application in any form. Any person skilled in the art can make many possible changes and modifications to the technical scheme of the present application or modify it into equivalent embodiments without departing from the scope of the technical scheme of the present application by using the disclosed methods and technical contents. Therefore, any equivalent changes made according to the shape, structure and principle of the present application should be covered in the protection scope of the present application.

Claims

1. A frame circuit breaker arrangement, characterized in that, The arc-extinguishing cavity and the current-carrying cavity are arranged side by side in any sequence in the horizontal direction.

2. A frame circuit breaker arrangement according to claim 1, c h a r a c t e r i z e d in that The top of the arc-extinguishing cavity and the current-carrying cavity arranged side by side in the horizontal direction is flush.

3. A frame circuit breaker arrangement according to claim 2, c h a r a c t e r i z e d in that The bottom of the arc-extinguishing cavity and the current-carrying cavity arranged side by side in the horizontal direction is flush.

4. A frame circuit breaker arrangement according to claim 1, wherein, The arc-extinguishing cavity located at the upper part of the current-carrying cavity is connected with the closest arc-extinguishing cavity arranged side by side in the horizontal direction, forming an L-shaped arc-extinguishing cavity.

5. A frame circuit breaker arrangement according to claim 1 or 4, c h a r a c t e r i z e d in that The mechanical cavity is arranged vertically above and below the arc-extinguishing cavity and the current-carrying cavity arranged side by side, and a mechanical system is installed in the mechanical cavity.

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