A frame circuit breaker

Abstract

This utility model relates to a frame circuit breaker, which includes: an insulating housing comprising an arc-extinguishing chamber and an operating housing mounted to the outside of a side plate of the arc-extinguishing chamber to form an installation cavity with the arc-extinguishing chamber; a vacuum arc-extinguishing component arranged vertically inside the arc-extinguishing chamber; and an actuating mechanism movably mounted to the side plate of the arc-extinguishing chamber within the installation cavity, wherein the actuating mechanism includes a vertically extending transmission portion and an output link that is linked to the lower end of the transmission portion and extends from the installation cavity through the side plate of the arc-extinguishing chamber into the arc-extinguishing chamber and is linked to the lower end of the vacuum arc-extinguishing component, so that the transmission portion can control the vacuum arc-extinguishing component to close via the output link in response to an external closing action.

Description

Technical Field

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

[0002] Frame circuit breakers are widely used in power systems for control and protection due to their high breaking capacity and high reliability. A frame circuit breaker typically includes an insulating housing and components such as contact parts and arc-extinguishing grids installed within the housing. When the contact parts break circuit current or fault current, an electric arc is generated between the moving and stationary contacts. This arc is then guided into the arc-extinguishing grids for cooling under the influence of electric and magnetic fields, thereby quickly extinguishing the arc.

[0003] However, the arc-extinguishing grids of existing frame circuit breakers have limited arc-extinguishing capabilities when facing high currents or special operating conditions, which can easily lead to damage to the contact components. Furthermore, they are also prone to thermal and mechanical damage from electric arcs during long-term use, resulting in performance degradation. This necessitates regular maintenance and replacement of the contact components and arc-extinguishing grids within the frame circuit breaker, leading to a significant maintenance workload.

[0004] Therefore, there is a demand in this field for frame circuit breakers with strong arc-extinguishing capabilities and easy maintenance. Utility Model Content

[0005] The present invention aims to provide a frame circuit breaker that can at least solve some of the above-mentioned problems.

[0006] According to one aspect of the present invention, a frame circuit breaker is provided, the frame circuit breaker comprising: an insulating housing including an arc-extinguishing chamber and an operating housing mounted to the outside of a side plate of the arc-extinguishing chamber to enclose and form an installation cavity with the arc-extinguishing chamber; a vacuum arc-extinguishing component arranged vertically inside the arc-extinguishing chamber; and an actuating mechanism movably mounted to the side plate of the arc-extinguishing chamber within the installation cavity, wherein the actuating mechanism includes a vertically extending transmission portion and an output link that is linked to the lower end of the transmission portion and extends from the installation cavity through the side plate of the arc-extinguishing chamber into the arc-extinguishing chamber and is linked to the lower end of the vacuum arc-extinguishing component, such that the transmission portion can control the vacuum arc-extinguishing component to close via the output link in response to an external closing action.

[0007] Compared with existing technologies, the frame circuit breaker of this invention improves arc-extinguishing capability and reduces maintenance costs by arranging an arc-extinguishing housing on one side of the operating housing and forming a relatively independent internal space within the arc-extinguishing housing, as well as a mounting cavity formed by the operating housing and the arc-extinguishing housing. This allows for the placement of a vacuum arc-extinguishing component inside the arc-extinguishing housing and an operating mechanism for controlling the vacuum arc-extinguishing component within the mounting cavity. Furthermore, by designing the arc-extinguishing housing as a relatively enclosed shell, requiring only an opening on the side facing the operating housing for the output linkage to pass through, the negative impact of external foreign objects entering the arc-extinguishing housing on the vacuum arc-extinguishing component can be minimized. Moreover, the linkage between the operating mechanism and the lower end of the vacuum arc-extinguishing component accelerates the breaking speed of the vacuum arc-extinguishing component during tripping.

[0008] Preferably, the frame circuit breaker further includes an elastic element disposed within the mounting cavity between the insulating housing and the output link, wherein the transmission part is capable of overcoming the force of the elastic element to drive the output link to close the vacuum arc-extinguishing component.

[0009] Preferably, the frame circuit breaker further includes an operating spindle movably mounted in the mounting cavity, wherein the transmission part includes an input link sleeved to the operating spindle and a transition link linked with the input link and the output link.

[0010] Preferably, the output link is connected to the arc-extinguishing housing via a support shaft located inside the arc-extinguishing housing.

[0011] Preferably, the output link includes an output section disposed between the transition link and the support shaft, and an action section disposed between the support shaft and the lower end of the vacuum arc extinguishing component and at an angle relative to the output section.

[0012] Preferably, the extension length of the output section away from the support shaft is greater than the extension length of the function section away from the support shaft.

[0013] Preferably, the frame circuit breaker further includes a first support and a second support for supporting the two ends of the elastic member, which is constructed in an elongated shape, wherein the first support is fixed to the region of the arc-extinguishing housing located below the operating spindle, and the second support is sleeved onto the support spindle.

[0014] Preferably, the vacuum interrupting component includes a vacuum interrupting chamber and a support portion located below the vacuum interrupting chamber and linked with the moving end of the vacuum interrupting chamber and the actuating section.

[0015] Preferably, the elastic element is constructed as a tension spring whose two ends are respectively hooked to the first support and the second support.

[0016] Preferably, the frame circuit breaker includes multiple vacuum arc-extinguishing components and multiple sets of actuating mechanisms, wherein the multiple vacuum arc-extinguishing components and multiple sets of actuating mechanisms are arranged in a one-to-one correspondence.

[0017] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is a perspective view of a frame circuit breaker according to an embodiment of the present utility model;

[0020] Figure 2 This is a partial perspective view of a frame circuit breaker according to an embodiment of the present invention after the operating housing has been removed, wherein the frame circuit breaker is in the closed state.

[0021] Figure 3 This is a partial cross-sectional view of a frame circuit breaker according to an embodiment of the present invention after the operating housing has been removed, wherein the frame circuit breaker is in the closed state.

[0022] Figure 4 This is a partial perspective view of a frame circuit breaker according to an embodiment of the present invention after the operating housing has been removed, wherein the frame circuit breaker is in the open state.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100-Frame circuit breaker; 10-Insulating housing; 11-Arc extinguishing box; 12-Operating housing; 20-Vacuum extinguishing component; 21-Vacuum extinguishing chamber; 22-Supporting part; 30-Actuating mechanism; 31-Transmission part; 311-Input link; 312-Transition link; 32-Output link; 321-Output section; 322-Actuating section; 41-Operating spindle; 42-Supporting shaft; 51-Elastic element; 52-First support element; 53-Second support element. Detailed Implementation

[0025] The schematic scheme of the frame circuit breaker disclosed in this utility model is now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0026] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0027] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0028] The terms "joining", "connection" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.) and direct connection of two components without the aid of any intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.).

[0029] Figures 1 to 4 The present invention's frame circuit breaker 100 is illustrated by way of example. This frame circuit breaker 100 achieves improved arc-extinguishing capability and reduced maintenance costs while maintaining a smaller size and lower cost, thereby allowing it to be applied to larger current applications and extending its service life. As shown in the figure, the frame circuit breaker 100 may include an insulating housing 10, a vacuum arc-extinguishing component 20, and an operating mechanism 30.

[0030] Specifically, the insulating housing 10 may include an arc-extinguishing chamber 11 made of insulating material and an operating housing 12. The arc-extinguishing chamber 11 may be constructed as a generally closed rectangular housing, and the operating housing 12 may be constructed as a rectangular housing with an opening on one side facing the arc-extinguishing chamber 11, so that when the operating housing 12 is installed to the outside of the side plate of the arc-extinguishing chamber 11, it can cooperate with the arc-extinguishing chamber 11 to form a mounting cavity independent of the interior of the arc-extinguishing chamber 11. For example, the rear side of the operating housing 12 may be designed as an opening and installed to the front side of the front side plate of the arc-extinguishing chamber 11, so that the operator can operate the frame circuit breaker 100 from the front side of the frame circuit breaker 100. It is understood that the "front" side and "rear" side referred to herein respectively refer to Figure 1 The left and right sides of the attached diagram refer to... Figure 1 In the attached diagram, the inside and outside of the page, as well as the "top" and "bottom" sides, refer to... Figure 1 The top and bottom sides of the attached diagram.

[0031] The lateral dimensions (left-right dimensions) and vertical dimensions (up-down dimensions) of the operating housing 12 can be designed to be substantially the same as those of a conventional frame circuit breaker 100. Therefore, the arc-extinguishing housing 11 arranged at the rear of the operating housing 12 avoids increasing the lateral and vertical dimensions of the frame circuit breaker 100 of this invention. In particular, the vacuum arc-extinguishing component 20 can be designed to be arranged vertically inside the arc-extinguishing housing 11. This allows the frame circuit breaker 100 of this invention to have a stronger arc-extinguishing capability compared to conventional arc-extinguishing grids without increasing the lateral and vertical dimensions of the frame circuit breaker 100 of this invention.

[0032] The mounting cavity of the insulating housing 10 can accommodate various mechanical or electrical components, such as the actuating mechanism 30 and the operating mechanism. The operating mechanism, such as the operating spindle 41, is movably mounted to the insulating housing 10, thereby moving relative to the insulating housing 10 in response to external manual or electric operation. The two ends of the actuating mechanism 30 are respectively linked to the operating mechanism and the vacuum interrupting component 20, thereby transmitting external operating force to the vacuum interrupting component 20 through the actuating mechanism 30, and thus realizing the control of the vacuum interrupting component 20.

[0033] Furthermore, the actuating mechanism 30 may include a transmission part 31 and an output link 32. The transmission part 31 is movably connected to the operating mechanism and extends vertically downward to minimize its occupation of space within the mounting cavity. The output link 32 extends longitudinally (i.e., in the front-rear direction) from the mounting cavity through the front side plate of the arc-extinguishing housing 11 into the arc-extinguishing chamber, thereby enabling the output link 32 to be linked with the lower end of the vacuum arc-extinguishing component 20. In this way, only a through hole is needed on the arc-extinguishing housing 11 to allow the output link 32 to pass through in order to link the operating mechanism with the vacuum arc-extinguishing component 20, which greatly reduces the negative impact of moisture, dust, and harmful gases entering the arc-extinguishing housing 11 on the performance of the vacuum arc-extinguishing component 20. In addition, the lower end of the vacuum arc-extinguishing chamber 21 is configured to be linked with the actuating mechanism 30, which allows the moving contact to separate more quickly by gravity during the opening operation and also facilitates maintenance of the moving contact of the vacuum arc-extinguishing component 20.

[0034] Optionally, such as Figure 2 As shown, the frame circuit breaker 100 may further include an elastic element 51 located within the mounting cavity and a first support 52 and a second support 53 for supporting the elastic element 51. The elastic element 51 may be arranged between the output link 32 and the insulating housing 10 which is stationary relative to the output link 32, preferably between the output link 32 and the front side plate of the arc extinguishing housing 11, so that the output link 32 must overcome the force of the elastic element 51 when moving under closing action, and the elastic element 51 can release energy to drive the output link 32 to move under opening action.

[0035] The elastic element 51 can be constructed as a slender structure extending vertically. The first support element 52 can be arranged on the insulating housing 10, and the second support element 53 can be arranged below the first support element 52 and on the output connecting rod 32, thereby allowing the two ends of the elastic element 51 to be connected to the first support element 52 and the second support element 53 respectively. In the illustrated embodiment, the first support element 52 can be generally constructed as a plate with a snap-fit ​​protrusion thereon, and the second support element 53 can include a pair of connecting plates and a connecting rod connecting the pair of connecting plates. The elastic element 51 can be constructed as a tension spring with both ends hooked to the snap-fit ​​protrusion of the first support element 52 and the connecting rod of the second support element 53 respectively. In embodiments not shown, the elastic element 51 can also be constructed as other forms of elastic structure, such as a compression spring, as long as the above functions are achieved.

[0036] Optionally, such as Figures 2 to 4As shown, the operating spindle 41 is arranged laterally and rotatably mounted to the operating housing 12. The transmission part 31 may include an input link 311 fixedly sleeved to the operating spindle 41 and a transition link 312 for linking the input link 311 and the output link 32. As shown, the radial extension length of the input link 311 relative to the operating spindle 41 is much smaller than the generally vertical extension length of the transition link 312, which can minimize the space occupied by the action mechanism 30 of this utility model.

[0037] Therefore, please refer to the specific details. Figure 3 When the frame circuit breaker 100 of this utility model is closed by the operator, the operating spindle 41 rotates counterclockwise relative to the insulating shell 10 in response to the closing action. The input link 311 moves downward with the operating spindle 41, and the output link 32 is pushed by the input link 311 to overcome the force of the elastic element 51 and rotate counterclockwise. The right end of the output link 32 can then push the lower end of the vacuum arc-extinguishing component 20 upward, so that the vacuum arc-extinguishing component 20 closes. When the frame circuit breaker 100 of this utility model is opened by the operator, the operating mechanism unlocks, the elastic element 51 releases energy instantaneously and pulls the output link 32 to rotate clockwise. The output link 32 pulls the lower end of the vacuum arc-extinguishing component 20 downward until the vacuum arc-extinguishing component 20 quickly disconnects. Figure 4 As shown.

[0038] Optionally, the output link 32 can be rotatably connected to the arc-extinguishing housing 11 via a laterally extending support shaft 42, which can be positioned inside the arc-extinguishing housing 11 to reduce the extension length of the output link 32 within the mounting cavity, thereby reducing the space occupied by the actuating mechanism 30 within the mounting cavity.

[0039] Furthermore, the output link 32 may include an output section 321 and an actuating section 322. The output section 321 may extend from the support shaft 42 toward the mounting cavity to be linked with the transition link 312, and the actuating section 322 may extend from the support shaft 42 toward the vacuum interrupter 20 to be linked with the lower end of the vacuum interrupter 20. The actuating section 322 may be designed to rotate relative to the extension direction of the output section 321 about the support shaft 42 toward the vacuum interrupter 20, so that the actuating section 322 is arranged at an angle to the output section 321, and the extension length of the actuating section 322 from the support shaft 42 is less than the extension length of the output section 321 from the support shaft 42, so that the lower end of the vacuum interrupter section can be subjected to a larger force, and also reduces the overall vertical space occupied by the actuating mechanism 30.

[0040] Optionally, such as Figure 2As shown, the first support member 52 can be arranged below the operating spindle 41, while the second support member 53 can be fixedly sleeved onto the support shaft 42, thereby utilizing the vertical space between the operating spindle 41 and the support shaft 42 to arrange the elastic member 51. In addition, the elastic member 51 is preferably arranged substantially opposite to the transition link 312 to optimize the energy storage and release path of the elastic member 51.

[0041] Optionally, such as Figure 3 As shown, the vacuum interrupter component 20 may include a vacuum interrupter chamber 21 and a support portion 22. The support portion 22 may be arranged on the lower side of the vacuum interrupter chamber 21 and is linked with the moving end and the actuating section 322 of the vacuum interrupter chamber 21 to transmit the force from the actuating mechanism 30 to the moving end of the vacuum interrupter chamber 21 via the support portion 22, thereby controlling the engagement or disengagement of the moving contact and stationary contact of the vacuum interrupter chamber 21. It can be seen that both the moving and stationary contacts of the vacuum interrupter chamber 21 are sealed inside the vacuum interrupter chamber 21, which prevents the contact portion of the frame circuit breaker 100 from being affected by unwanted moisture, dust, etc., and eliminates the need for maintenance, thereby greatly reducing maintenance costs and workload.

[0042] Optionally, such as Figure 4 As shown, the frame circuit breaker 100 is applicable to multi-phase circuits, and therefore a vacuum arc-extinguishing component 20 and a corresponding operating mechanism 30 can be assigned to each phase circuit to control and protect the multi-phase circuit.

[0043] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0044] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A frame circuit breaker (100), characterized by, The frame circuit breaker (100) includes: An insulating housing (10) includes an arc-extinguishing chamber (11) and an operating housing (12) mounted to the outside of a side plate of the arc-extinguishing chamber (11) to enclose the arc-extinguishing chamber (11) and form an installation cavity therewith; Vacuum arc-extinguishing component (20) is arranged vertically inside the arc-extinguishing chamber (11); An actuating mechanism (30) is movably mounted within the mounting cavity to the side plate of the arc-extinguishing housing (11), wherein the actuating mechanism (30) includes a vertically extending transmission portion (31) and an output link (32) that is linked to the lower end of the transmission portion (31) and extends from the mounting cavity through the side plate of the arc-extinguishing housing (11) into the arc-extinguishing housing (11) and is linked to the lower end of the vacuum arc-extinguishing component (20), so that the transmission portion (31) can control the vacuum arc-extinguishing component (20) to close via the output link (32) in response to an external closing action.

2. The frame circuit breaker (100) of claim 1, characterized in that, The frame circuit breaker (100) further includes an elastic element (51) disposed within the mounting cavity between the insulating housing (10) and the output link (32), wherein the transmission part (31) is capable of overcoming the force of the elastic element (51) to drive the output link (32) to close the vacuum arc extinguishing component (20).

3. The frame circuit breaker (100) of claim 2, characterized in that, The frame circuit breaker (100) also includes an operating spindle (41) movably mounted in the mounting cavity, wherein the transmission part (31) includes an input link (311) sleeved to the operating spindle (41) and a transition link (312) linked with the input link (311) and the output link (32).

4. The frame circuit breaker (100) of claim 3, characterized in that, The output link (32) is connected to the arc extinguishing box (11) via a support shaft (42) located inside the arc extinguishing box (11).

5. The frame circuit breaker (100) of claim 4, characterized in that, The output link (32) includes an output section (321) arranged between the transition link (312) and the support shaft (42) and an action section (322) arranged between the support shaft (42) and the lower end of the vacuum arc extinguishing component (20) and at an angle relative to the output section (321).

6. The frame circuit breaker (100) of claim 5, characterized in that, The extension length of the output section (321) away from the support shaft (42) is greater than the extension length of the function section (322) away from the support shaft (42).

7. The frame circuit breaker (100) of claim 5, wherein, The frame circuit breaker (100) further includes a first support (52) and a second support (53) for supporting the two ends of the elastic member (51) which is constructed in an elongated shape, wherein the first support (52) is fixed to the region of the arc extinguishing housing (11) located below the operating spindle (41), and the second support (53) is sleeved onto the support spindle (42).

8. The frame circuit breaker (100) of claim 5, wherein, The vacuum interrupting component (20) includes a vacuum interrupting chamber (21) and a support portion (22) located below the vacuum interrupting chamber (21) and linked with the moving end of the vacuum interrupting chamber (21) and the actuating section (322).

9. The frame circuit breaker (100) of claim 7, wherein, The elastic element (51) is constructed as a tension spring with both ends hooked to the first support (52) and the second support (53) respectively.

10. The frame circuit breaker (100) of claim 1, wherein, The frame circuit breaker (100) includes multiple vacuum arc extinguishing components (20) and multiple sets of actuating mechanisms (30), wherein the multiple vacuum arc extinguishing components (20) and multiple sets of actuating mechanisms (30) are arranged in a one-to-one correspondence.

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