Circuit breaker

Abstract

The present invention provides a circuit breaker device, which relates to the technical field of power equipment. The circuit breaker device includes: an isolating switch and a circuit breaker, wherein the isolating switch and the circuit breaker are electrically connected via a copper column; the isolating switch is located at the front end of the circuit of the circuit breaker. An isolating switch is added at the front end of the circuit breaker to achieve a visible and obvious disconnection point, thereby improving safety. Because the isolating switch is visible, it can be seen from the outside whether the isolating switch is physically connected, thereby knowing whether there is power output at the user end. The safety of operators is improved, and personal and equipment risks caused by misoperation are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a circuit breaker. Background Art

[0002] At present, low-voltage molded case circuit breakers are widely used in low-voltage power grids. Since low-voltage molded case circuit breakers are injection molded, the opening and closing conditions of the internal circuit breakers cannot be observed. Therefore, it is impossible to confirm 100% that the circuit breaker switch is in the open state, which can easily cause misoperation. Summary of the invention

[0003] The purpose of the present invention is to provide a circuit breaker device to alleviate the technical problem of potential safety hazards in existing circuit breakers.

[0004] A circuit breaker device provided by an embodiment of the present invention comprises: an isolating switch and a circuit breaker, wherein the isolating switch and the circuit breaker are electrically connected via a copper column;

[0005] The isolating knife switch is located at the circuit front end of the circuit breaker.

[0006] Furthermore, the circuit breaker device includes a linkage operating mechanism and a fixed plate, the number of the fixed plates is two, and the two fixed plates are respectively located on both sides of the isolation switch and the circuit breaker;

[0007] The linkage operating mechanism comprises a first action output end and a second action output end, and the first action output end and the second action output end act on the moving contact of the isolation knife switch and the opening and closing handle of the circuit breaker respectively; when power is supplied, the linkage operating mechanism can close the isolation knife switch first and then close the circuit breaker; when power is off, the linkage operating mechanism can open the circuit breaker and then open the isolation knife switch.

[0008] Furthermore, the linkage operating mechanism includes an operating handle, a mechanism main shaft, a mechanism connecting plate, a moving contact connecting piece, a switch main connecting rod, a switch opening lever, a switch auxiliary connecting rod, and a switch closing lever;

[0009] The operating handle is fixedly connected to the main shaft of the mechanism, and the operating handle is used to drive the main shaft of the mechanism to rotate around its axis;

[0010] The mechanism main shaft is fixedly connected to the mechanism connecting plate;

[0011] One end of the moving contact connecting piece is hinged to the moving contact of the isolating knife switch, and the other end is hinged to the mechanism connecting plate;

[0012] One end of the switch main connecting rod is hinged to the mechanism connecting plate, and the other end is fixedly connected to the switch opening lever;

[0013] One end of the switch auxiliary connecting rod is hinged to the switch main connecting rod, and the other end is fixedly connected to the switch opening lever;

[0014] The fixing plate is provided with an axial hole matched with the mechanism main shaft so that the mechanism main shaft is connected with the operating handle;

[0015] The fixing plate is provided with a slide groove, and the switch opening lever and the switch closing lever are respectively slidably connected in the slide groove.

[0016] Furthermore, the number of the mechanism connecting plate, the switch main connecting rod and the switch secondary connecting rod is at least two.

[0017] Furthermore, one end of the moving contact connecting piece is provided with an oblong hole, which is connected to the moving contact of the isolating knife switch through a movable pin, and the other end is provided with a round hole which is connected to the mechanism connecting plate through a movable pin;

[0018] One end of the switch main connecting rod is provided with a round hole through which a movable pin is connected to the mechanism connecting plate, and the other end is provided with a thread connected to the switch opening lever thread;

[0019] One end of the switch auxiliary connecting rod is provided with a round hole which cooperates with the axial hole of the switch main connecting rod, and the other end is provided with a thread which is threadedly connected with the switch opening lever.

[0020] Furthermore, the linkage operating mechanism includes two fixed bearings, which are respectively arranged on the two fixed plates, and the two fixed bearings are used to support the main shaft of the mechanism.

[0021] Furthermore, a rubber insulating sleeve is provided on the operating handle.

[0022] Furthermore, the mechanism main shaft is welded to the mechanism connecting plate.

[0023] Furthermore, the circuit breaker device comprises a mounting plate, and the isolating switch and the circuit breaker are both fixedly mounted on the mounting plate.

[0024] Furthermore, the mounting plate is made of insulating material.

[0025] The embodiments of the present invention bring the following beneficial effects:

[0026] The circuit breaker device provided in the embodiment of the present invention includes: an isolating switch and a circuit breaker, wherein the isolating switch and the circuit breaker are electrically connected via a copper column; the isolating switch is located at the front end of the circuit of the circuit breaker. An isolating switch is added at the front end of the circuit breaker to achieve a visible and obvious disconnection point, thereby improving safety. Because the isolating switch is visible, it can be seen from the outside whether the isolating switch is physically connected, thereby knowing whether there is power output at the user end. The safety of operators is improved, and personal and equipment risks caused by misoperation are reduced.

[0027] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of a circuit breaker provided by an embodiment of the present invention;

[0031] Figure 2 A side view of a circuit breaker provided by an embodiment of the present invention;

[0032] Figure 3 A schematic diagram of another circuit breaker provided in an embodiment of the present invention.

[0033] Icons: 100-fixed plate; 110-slide groove; 200-copper column; 300-isolating knife switch; 410-operating handle; 420-mechanism main shaft; 430-mechanism connecting plate; 440-moving contact connecting piece; 450-switch main connecting rod; 460-switch opening lever; 470-switch auxiliary connecting rod; 480-switch closing lever; 500-circuit breaker; 510-opening and closing handle. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] like Figure 1-Figure 2 As shown, the circuit breaker device provided by the embodiment of the present invention includes: an isolating switch 300 and a circuit breaker 500, wherein the isolating switch 300 and the circuit breaker 500 are electrically connected via a copper column 200; the isolating switch 300 is located at the front end of the circuit of the circuit breaker 500. The isolating switch 300 is added at the front end of the circuit breaker 500 to achieve a visible and obvious disconnection point, thereby improving safety. Because the isolating switch 300 is visible, that is, it can be seen from the outside whether the isolating switch 300 is physically connected, thereby knowing whether there is power output at the user end.

[0038] The circuit breaker device includes a linkage operating mechanism and a fixed plate 100, wherein the number of the fixed plates 100 is two, and the two fixed plates 100 are respectively located on both sides of the isolation knife switch 300 and the circuit breaker 500; the linkage operating mechanism includes a first action output end and a second action output end, and the first action output end and the second action output end act on the moving contact of the isolation knife switch 300 and the opening and closing handle 510 of the circuit breaker 500 respectively; when power is supplied, the linkage operating mechanism can first close the isolation knife switch 300 and then close the circuit breaker 500; when power is cut off, the linkage operating mechanism can open the circuit breaker 500 and then open the isolation knife switch 300. The switching operation linkage of the isolation knife switch 300 and the circuit breaker 500 is realized, when power is supplied, the isolation knife switch 300 is closed first and then the circuit breaker 500 is closed, and when power is cut off, the circuit breaker 500 is opened first and then the isolation knife switch 300 is opened, and the operation is safe and reliable.

[0039] like Figure 3As shown, specifically, the linkage operating mechanism includes an operating handle 410, a mechanism main shaft 420, a mechanism connecting plate 430, a moving contact connecting piece 440, a switch main connecting rod 450, a switch opening lever 460, a switch secondary connecting rod 470, and a switch closing lever 480; the operating handle 410 is fixedly connected to the mechanism main shaft 420, and the operating handle 410 is used to drive the mechanism main shaft 420 to rotate around its axis; the mechanism main shaft 420 is fixedly connected to the mechanism connecting plate 430; one end of the moving contact connecting piece 440 is hinged to the moving contact of the isolation knife switch 300, and the other end is hinged to the mechanism connecting plate 430. The connecting plate 430 is hinged; one end of the switch main connecting rod 450 is hinged to the mechanism connecting plate 430, and the other end is fixedly connected to the switch opening lever 460; one end of the switch secondary connecting rod 470 is hinged to the switch main connecting rod 450, and the other end is fixedly connected to the switch opening lever 460; the fixed plate 100 is provided with an axial hole that cooperates with the mechanism main shaft 420, so that the mechanism main shaft 420 is connected to the operating handle 410; the fixed plate 100 is provided with a slide groove 110, and the switch opening lever 460 and the switch closing lever 480 are respectively slidably connected in the slide groove 110.

[0040] Instructions for operating mechanism linkage:

[0041] 1. Opening operation:

[0042] The operating handle 410 can rotate 180 degrees clockwise, from 0 to 90 degrees, the operating handle 410 drives the mechanism main shaft 420 to rotate, and the mechanism main shaft 420 drives the mechanism connecting plate 430 to rotate. The switch main connecting rod 450 pushes the switch opening lever 460 to move downward, and the switch opening lever 460 squeezes the circuit breaker 500 switch opening and closing handle 510 to open the circuit breaker 500; in this process, although the moving contact connecting piece 440 rotates, it has not completed its action stroke, so the moving contact will not move, and the isolation knife switch 300 has not been opened.

[0043] The operating handle 410 can rotate 180 degrees clockwise. The operating handle 410 is linked to the mechanism main shaft 420 and the mechanism connecting plate 430 when the operating handle 410 rotates from 90 to 180 degrees. The mechanism connecting plate 430 drives the moving contact connecting piece 440 to rotate, and the moving contact connecting piece 440 is linked to the moving contact opening action to separate the isolation knife switch 300. In this process, the switch main connecting rod 450 rotates downward and moves in an arc, so the vertical position of the switch opening lever 460 does not change, and the circuit breaker 500 opening and closing handle 510 does not move.

[0044] 2. Closing operation:

[0045] The operating handle 410 can rotate 180 degrees clockwise. When the operating handle 410 rotates from 180 to 90 degrees, the operating handle 410 links the mechanism main shaft 420, the mechanism connecting plate 430 and the moving contact connecting piece 440. The moving contact connecting piece 440 links the moving contact closing action to close the isolating knife switch 300. During this process, the opening and closing handle 510 of the circuit breaker 500 will not move.

[0046] The operating handle 410 can rotate 180 degrees counterclockwise, and the rotation from 90 to 0 degrees, the operating handle 410 links the mechanism main shaft 420 and the mechanism connecting plate 430. The switch main connecting rod 450 moves upward, and then pulls the switch opening lever 460, the switch auxiliary connecting rod 470 and the switch closing lever 480, and the molded case circuit breaker 500 opening and closing handle 510 is pressed upward by the switch closing lever 480, so that the circuit breaker 500 is switched on and off; the moving contact will not move during this process.

[0047] The isolating switch 300 and the circuit breaker 500 are linked in a multi-link form, and the isolating switch 300 and the circuit breaker 500 are moved in sequence by setting a reasonable lever arm length and an angle relationship between various structures.

[0048] In order to increase the stability of the linkage operation mechanism, the number of the mechanism connecting plate 430, the switch main connecting rod 450 and the switch sub-connecting rod 470 is at least two. The two mechanism connecting plates 430, the switch main connecting rod 450 and the switch sub-connecting rod 470 are arranged at intervals in the left-right direction to reduce the shaking of the mechanism main shaft 420 when it rotates.

[0049] Specifically, an oblong hole is provided at one end of the moving contact connecting piece 440, which is connected to the moving contact of the isolation knife switch 300 through a movable pin, and a round hole is provided at the other end to be connected to the mechanism connecting plate 430 through a movable pin.

[0050] One end of the switch main connecting rod 450 is provided with a round hole through which a movable pin is connected to the mechanism connecting plate 430, and the other end is provided with a thread which is threadedly connected to the switch opening lever 460.

[0051] One end of the switch auxiliary connecting rod 470 is provided with a round hole that matches the axial hole of the switch main connecting rod 450, and the other end is provided with a thread that is threadedly connected to the switch opening lever 460.

[0052] In order to increase the rotation smoothness of the mechanism main shaft 420 , the linkage operating mechanism includes two fixed bearings, which are respectively arranged on two fixed plates 100 , and the two fixed bearings are used to support the mechanism main shaft 420 .

[0053] The isolating switch 300 and the circuit breaker 500 are electrically connected via the copper column 200, and the conductive performance is better.

[0054] The operating handle 410 is provided with a rubber insulating sleeve to further increase safety.

[0055] The mechanism main shaft 420 and the mechanism connecting plate 430 are welded, and the structure is more solid.

[0056] Furthermore, the circuit breaker device includes a mounting plate, and the isolating switch 300 and the circuit breaker 500 are both fixedly mounted on the mounting plate.

[0057] Furthermore, the mounting plate is made of insulating material.

[0058] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A circuit breaker device, characterized in that: include: An isolating knife switch and a circuit breaker, wherein the isolating knife switch and the circuit breaker are electrically connected via a copper column; The isolating switch is located at the front end of the circuit of the circuit breaker; The circuit breaker device comprises a linkage operating mechanism and a fixing plate, wherein the number of the fixing plates is two, and the two fixing plates are respectively located on both sides of the isolating knife switch and the circuit breaker; The linkage operating mechanism comprises a first action output end and a second action output end, wherein the first action output end acts on the moving contact of the isolating knife switch; the second action output end acts on the opening and closing handle of the circuit breaker; when power is supplied, the linkage operating mechanism can first close the isolating knife switch and then close the circuit breaker; when power is cut off, the linkage operating mechanism can open the circuit breaker and then open the isolating knife switch; The linkage operating mechanism includes an operating handle, a mechanism main shaft, a mechanism connecting plate, a moving contact connecting piece, a switch main connecting rod, a switch opening lever, a switch auxiliary connecting rod, and a switch closing lever; The operating handle is fixedly connected to the main shaft of the mechanism, and the operating handle is used to drive the main shaft of the mechanism to rotate around its axis; The mechanism main shaft is fixedly connected to the mechanism connecting plate; One end of the moving contact connecting piece is hinged to the moving contact of the isolating knife switch, and the other end is hinged to the mechanism connecting plate; One end of the switch main connecting rod is hinged to the mechanism connecting plate, and the other end is fixedly connected to the switch opening lever; One end of the switch auxiliary connecting rod is hinged to the switch opening lever, and the other end is fixedly connected to the switch closing lever; The fixing plate is provided with an axial hole matched with the mechanism main shaft so that the mechanism main shaft is connected with the operating handle; The fixing plate is provided with a slide groove, and the switch opening lever and the switch closing lever are respectively slidably connected in the slide groove; The opening and closing handle is set between the switch opening lever and the switch closing lever; the opening and closing handle is squeezed by the switch opening lever to open the circuit breaker; the opening and closing handle is squeezed upward by the switch closing lever to close the circuit breaker; The circuit breaker device comprises a mounting plate, and the isolating switch and the circuit breaker are both fixedly mounted on the mounting plate.

2. The circuit breaker device according to claim 1, characterized in that: The number of the mechanism connecting plate, the switch main connecting rod and the switch auxiliary connecting rod is at least two.

3. The circuit breaker device according to claim 2, characterized in that: One end of the moving contact connecting piece is provided with an oblong hole, which is connected to the moving contact of the isolating knife switch through a movable pin, and the other end is provided with a round hole which is connected to the mechanism connecting plate through a movable pin; One end of the switch main connecting rod is provided with a round hole through which a movable pin is connected to the mechanism connecting plate, and the other end is provided with a thread connected to the switch opening lever thread; One end of the switch auxiliary connecting rod is provided with a round hole which cooperates with the axial hole of the switch opening lever, and the other end is provided with a thread which is connected with the thread of the switch closing lever.

4. The circuit breaker device according to claim 1, characterized in that: The linkage operating mechanism comprises two fixed bearings, which are respectively arranged on the two fixed plates and are used to support the main shaft of the mechanism.

5. The circuit breaker device according to claim 1, characterized in that: The operating handle is provided with a rubber insulating sleeve.

6. The circuit breaker device according to claim 1, characterized in that: The mechanism main shaft is welded to the mechanism connecting plate.

7. The circuit breaker device according to claim 1, characterized in that: The mounting plate is made of insulating material.

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