Frame circuit breaker

Abstract

The invention belongs to the technical field of frame circuit breakers, and particularly discloses a frame circuit breaker 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 sequence 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. According to the invention, 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] The present invention relates to the technical field of frame circuit breakers, and in particular to a frame circuit breaker. Background Art

[0002] The layout of the current traditional frame-type circuit breaker arc extinguishing system, such as Figure 1 As shown, the arc extinguishing system is located above the current carrying system. Figure 1 The dotted box in the figure is the arc extinguishing cavity. The layout structure has the following unreasonable features:

[0003] 1. First of all, because the circuit breaker has a larger current carrying capacity, it will inevitably require a larger moving and static contact system, which will inevitably occupy a larger volume and space in the circuit breaker as a whole, resulting in a relatively small volume of available arc extinguishing space.

[0004] 2. Secondly, due to the shape of the moving and static contacts themselves and the relationship between the base and the bottom plate, the space volume that can be used for arc extinguishing is often nearly in the shape of a cube, which is not conducive to the arc extinguishing grids being arranged in long strips in the direction of cutting the arc, and the number of arc extinguishing grids that can be arranged in the improved series arc extinguishing scheme is also limited. In the final analysis, it is caused by the unreasonable shape of the arc extinguishing space.

[0005] 3. Again, in order to ensure the reliability of the contact between the active and static contacts, the structure of arc-moving and static contacts is often used to allow the arc to be generated between them, instead of the active and static contacts being burned by the arc, to ensure the reliability of the contact between the active and static contacts. Traditional arc-moving contacts are often one or several active contacts extended, and during the closing process, they can ensure that the closing is before the active and static contacts, and after the moving and static contacts are opened, to ensure that the arc is always generated between the arc-moving and static contacts. However, the extended arc-moving contact often greatly affects the air tightness of the arc extinguishing system during movement, which can easily cause difficulty in arc transfer and cause disconnection failure; and the arc-moving contact moves with the active contact, which can easily lead to unreliable current commutation between the main and arc contacts, and easily cause arcs to be generated between the active and static contacts, and cause burning effects on them, resulting in connection and disconnection failures.

[0006] 4. Again, the cavity for the traditional active and static contacts to contact the current-carrying system and the arc extinguishing system are in the same cavity. After multiple disconnections in the cavity, the environment is complex and there are many uncontrollable factors. Different systems are prone to interfere with each other, that is, problems in the arc extinguishing system cause unnecessary impact on the current-carrying system, or problems in the current-carrying system cause unnecessary impact on the arc extinguishing system.

[0007] 5. Finally, since the main, moving and static contacts share the same cavity with the current-carrying system and the arc-extinguishing system, the sealing of the arc-extinguishing system often leads to a large temperature rise in the cavity.

[0008] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0009] The purpose of the present invention is to solve the technical problems existing in the background technology, and for this purpose, a frame circuit breaker is provided.

[0010] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0011] The frame circuit breaker consists of a mechanical system, an arc extinguishing system 1, an arc extinguishing system 2, a current carrying system 1 and a current carrying system 2. The function of the current carrying system 1 and the current carrying system 2 is mainly to connect or disconnect the main circuit through the connection and disconnection of the active and static contacts. The function of the arc extinguishing system 1 and the arc extinguishing system 2 is mainly to carry the arc action through the arc moving and static contacts in them closing and opening first and then opening compared with the active and static output contacts, so that the arc can be extinguished in the arc extinguishing system 1 and 2. The mechanical system mainly stores and releases energy through the movement of various connecting rods to realize the role and function of driving the moving contact to close and open, which is consistent with the traditional frame circuit breaker. The commutation function mainly realizes the current switching between the arc moving and static contacts and the active and static contacts through the closing and opening of the arc moving and static contacts in the arc extinguishing system. When connected, since the moving and static contacts touch first, arcing will inevitably occur between the moving and static contacts, and the current will mainly flow through the moving and static contacts. When the active and static contacts are connected, the moving and static contacts are disconnected to achieve current switching. Similarly, when disconnecting, the current is transferred from the active and static arc contacts to the moving and static contacts alone. Since the moving and static contacts are disconnected later, arcing will inevitably occur between the moving and static contacts.

[0012] The current-carrying system and the arc-extinguishing system are arranged in different cavities, that is, 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 ribs. The mechanical system is installed in the mechanical cavity, and the mechanical cavity is arranged in two parts in the vertical direction, the arc-extinguishing cavity and the current-carrying cavity are arranged side by side.

[0013] When there are two arc-extinguishing cavities and two current-carrying cavities, the two arc-extinguishing cavities and the two current-carrying cavities are arranged side by side in any order in the horizontal direction, and a total of 6 layouts can be arranged. The tops of the arc-extinguishing cavities and the current-carrying cavities arranged side by side in the horizontal direction are flush. The bottoms of the arc-extinguishing cavities and the current-carrying cavities arranged side by side in the horizontal direction are flush.

[0014] When the tops of the arc-extinguishing cavity and the current-carrying cavity are not flush, that is, there is still a certain space of the arc-extinguishing cavity located above the current-carrying cavity, the arc-extinguishing cavity located above the current-carrying cavity is connected with the arc-extinguishing cavity that is closest to the corresponding current-carrying cavity and is distributed side by side, forming an L-shaped arc-extinguishing cavity, and a total of 2 layout modes can be arranged. Based on this structure, it is applied to n arc-extinguishing cavities and m current-carrying cavities, and a layout combination between 2 arc-extinguishing cavities and m current-carrying cavities can be performed, or a layout combination between n arc-extinguishing cavities and 2 current-carrying cavities can be performed.

[0015] Compared with the prior art, the present invention has the following technical effects:

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

[0017] 2. Improving the reliability of commutation between arc contacts is the prerequisite for successful breaking;

[0018] 3. The current-carrying system is separated from the arc-extinguishing system to reduce or avoid mutual interference and influence between different systems;

[0019] 4. Improve the air flow in the current-carrying cavity and reduce excessive temperature rise.

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

[0024] Figure 3 It is a front view structural schematic diagram of the frame circuit breaker of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the frame circuit breaker of the present invention;

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

[0027] Figure 6It is a schematic diagram of the internal side structure of the frame circuit breaker of the present invention;

[0028] Figure 7 It is a schematic diagram of the internal structure of the frame circuit breaker of the present invention;

[0029] Figure 8 yes Figure 7 A side view schematic diagram of the structure;

[0030] Fig. 9 It is a schematic diagram of the arrangement positions of two arc-extinguishing cavities and two current-carrying cavities of the present invention;

[0031] Fig.10 It is a schematic diagram of the arrangement positions of two arc-extinguishing cavities and two current-carrying cavities of the present invention;

[0032] Fig.11 (a) is a schematic diagram of the arrangement of two arc-extinguishing cavities and m current-carrying cavities of the present invention, Fig.11 (b) is a schematic diagram of the arrangement positions of n arc-extinguishing cavities and two current-carrying cavities of the present invention.

[0033] Figure numerals: 1. arc extinguishing cavity; 101. arc extinguishing cavity one; 102. arc extinguishing cavity two; 2. base; 3. active contact; 4. bottom plate; 5. static contact terminal; 6. moving contact terminal; 7. arc extinguishing system one; 8. arc extinguishing system two; 9. current-carrying system one; 10. current-carrying system two; 11. mask; 12. mechanical system; 1301. commutation conductor one; 1302. commutation conductor two; 1303. commutation conductor three; 1304. commutation conductor four; 14. fixing bolt; 15. moving contact; 16. arc one; 17. arc two; 18. arc extinguishing system housing; 19. moving arc-starting piece; 20. main shaft; 21. connecting rod; 22. rotating shaft; 23. arc contact; 24. upper air outlet; 25. lower air outlet; 26. arc jumping. DETAILED DESCRIPTION

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

[0035] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be understood that the terms "one" and "two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "one" or "two" may explicitly or implicitly include at least one of the features.

[0037] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to 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 a mechanical system 12, an arc extinguishing system 17, an arc extinguishing system 28, a current-carrying system 19, a current-carrying system 210, a base 2, a bottom plate 4, and a mask 11. The function of the current-carrying system 19 and the current-carrying system 210 is mainly to connect or disconnect the main circuit by connecting and disconnecting the active and static contacts. The function of the arc extinguishing system 17 and the arc extinguishing system 28 is mainly to carry the arc action by the arc moving and static contacts therein being closed first and opened later than the active and static output contacts, so that the arc can be extinguished in the arc extinguishing system 17 and 2. The mechanical system 12 mainly stores and releases energy through the movement of various connecting rods 21 to realize the function and function of driving the moving contact 15 to close and open, which is consistent with the traditional frame circuit breaker. The commutation function is mainly realized by the arc moving and static contacts in the arc extinguishing system being closed first and opened later to realize the current switching between the arc moving and static contacts and the active and static contacts. When connected, since the arc moving and static contacts are in contact first, arcing will inevitably occur between the arc moving and static contacts, and the current will mainly flow through the arc moving and static contacts. When the active and static contacts are connected, the arc moving and static contacts are disconnected to achieve current switching. Similarly, when disconnected, the current carrying is changed from the active and static arc contacts 23 to only the arc moving and static contacts, so as to achieve current transfer. Since the arc moving and static contacts are disconnected later, arcing will inevitably occur between the arc moving and static contacts.

[0039] like Figure 4 , 5 As shown in Figure 6, the internal structure of the frame circuit breaker includes an arc extinguishing cavity 101, an arc extinguishing cavity 2 102, a current carrying cavity 1, a current carrying cavity 2, a commutation conductor 1 1301, a commutation conductor 2 1302, a commutation conductor 3 1303, a commutation conductor 4 1304, a static contact, a moving contact 15, a static contact terminal 5, a moving contact terminal 6, a moving arc-starting piece 19, a main shaft 20, a connecting rod 21, a rotating shaft 22, an arc contact 23, and the like.

[0040] The current-carrying system and the arc-extinguishing system are arranged in different cavities, that is, 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 ribs. The mechanical system 12 is installed in the mechanical cavity, and the mechanical cavity is arranged in two upper and lower parts in a vertical direction with the arc-extinguishing cavity 1 and the current-carrying cavity arranged side by side.

[0041] like Fig. 9 As shown, A and M represent the layout positions of the arc-extinguishing cavity 1 and the current-carrying cavity, respectively. When there are two arc-extinguishing cavities 1 and two current-carrying cavities, the two arc-extinguishing cavities 1 and the two current-carrying cavities are arranged side by side in any order in the horizontal direction, and a total of 6 layout modes can be arranged. The tops of the arc-extinguishing cavity 1 and the current-carrying cavity arranged side by side in the horizontal direction are flush. The bottoms of the arc-extinguishing cavity 1 and the current-carrying cavity arranged side by side in the horizontal direction are flush.

[0042] like Fig.10 As shown, in combination with the existing technical frame circuit breaker, the original arc extinguishing chamber part on the upper part of the current-carrying cavity is vacant, and under certain conditions, it can also be used to arrange the arc extinguishing system, that is, when the tops of the arc extinguishing cavity 1 and the current-carrying cavity are not flush, that is, the arc extinguishing cavity 1 located on the upper part of the current-carrying cavity still has a certain space, then the arc extinguishing cavity 1 located on the upper part of the current-carrying cavity is connected with the arc extinguishing cavity 1 distributed side by side which is closest to the corresponding current-carrying cavity, forming an L-shaped arc extinguishing cavity 1, and a total of 2 layout methods can be arranged.

[0043] like Fig.11 As shown, in Fig.10 On the basis of the structure, it is applied to n arc-extinguishing cavities 1 and m current-carrying cavities, and a layout combination between 2 arc-extinguishing cavities 1 and m current-carrying cavities can be performed, or a layout combination between n arc-extinguishing cavities 1 and 2 current-carrying cavities can be performed.

[0044] Since the arc extinguishing system of the present invention has a different layout from the traditional solution, the original arc extinguishing chamber area is left vacant (or air outlets are opened at the top and bottom of the arc extinguishing cavity 1), which allows relatively easy air convection with the outside world. This greatly helps reduce the temperature rise problem of the active 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 structures of the arc-extinguishing system and the current-carrying system are changed accordingly:

[0046] like Figure 6 As shown, a large number of arc extinguishing grids, arc contacts 23, and moving arc-starting plates 19 are installed in the arc extinguishing cavity 1; and the commutation conductor passes through the arc extinguishing cavity 1 and the current-carrying cavity, so that one end of the commutation conductor is in the arc extinguishing cavity 1 and contacts the arc contact 23, and the other end is in the current-carrying cavity and connected to the static contact. The rotating shaft 22 passes 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 current-carrying cavity is provided with a stationary contact terminal 5, a stationary contact, a moving contact 15, and a moving contact terminal 6. The moving contact 15 is mounted on the rotating shaft 22 and rotates therewith.

[0048] When the switch is opened, since the arc contact 23 opens later than the moving contact 15, an arc is generated at the position of the arc contact 23 in the arc extinguishing system, arc 16 is generated in the arc extinguishing system 17, and arc 2 17 is generated in the arc extinguishing system 2 8. The arc extinguishing current path is: incoming line, static contact terminal 5 of current-carrying system 19, static contact of current-carrying system 19, commutation conductor 4 1304, arc 16, arc extinguishing grid, moving arc-starting plate 19, commutation conductor 3 1303, moving contact terminal 6 of current-carrying system 19, moving contact terminal 6 of current-carrying system 2 10, commutation conductor 1 1301, moving arc-starting plate 19, arc extinguishing grid, arc 2 17, commutation conductor 2 1302, static contact of current-carrying system 2 10, static contact terminal 5 of current-carrying system 2 10, and outgoing line. Therefore, the arc extinguishing task of the circuit is realized in arc extinguishing system 17 and arc extinguishing system 2 8.

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

[0050] The arc extinguishing system fixes the arc extinguishing system housing 18 on the base 2 through the fixing bolts 14. At the same time, the commutation conductor is connected to the moving arc-starting piece 19 of the arc extinguishing system through the fixing bolts 14 to form a commutation path.

[0051] like Figure 7 and 8 As shown, an arc jumper 26 structure is designed between the commutation conductor and the moving contact 15 to achieve commutation. When the switch is opened, the moving contact 15 opens and contacts the commutation conductor to generate an arc jumper 26 to achieve commutation and is faster than the opening of the arc contact 23. Therefore, an arc is generated at the position of the arc contact 23 in the arc extinguishing system.

[0052] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame circuit breaker, characterized in that: It comprises a plurality of arc-extinguishing cavities and a plurality of current-carrying cavities, wherein the plurality of arc-extinguishing cavities and the plurality of current-carrying cavities are horizontally arranged side by side in any order, an arc-extinguishing system is installed in the arc-extinguishing cavity, and a current-carrying system is installed in the current-carrying cavity.

2. A frame circuit breaker according to claim 1, characterized in that: The tops of the arc-extinguishing cavity and the current-carrying cavity, which are arranged side by side in the horizontal direction, are flush with each other.

3. A frame circuit breaker as claimed in claim 2, characterized in that: The bottoms of the arc-extinguishing cavity and the current-carrying cavity, which are arranged side by side in the horizontal direction, are flush with each other.

4. A frame circuit breaker according to claim 1, characterized in that: It also includes an arc-extinguishing cavity located above the current-carrying cavity, which is connected to the arc-extinguishing cavity that is closest to the corresponding current-carrying cavity and is distributed side by side to form an L-shaped arc-extinguishing cavity.

5. A frame circuit breaker according to claim 1 or 4, characterized in that: It also includes a mechanical cavity, which is arranged in two parts in a vertical direction, the arc-extinguishing cavity and the current-carrying cavity that are distributed side by side, and the mechanical system is installed in the mechanical cavity.

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