Modular operating mechanism, vacuum circuit breaker and assembling method thereof

Abstract

The invention relates to a modular operating mechanism for a vacuum circuit breaker, and the mechanism comprises a module support which is provided with an energy storage mechanism, a switching-on mechanism, and a switching-off mechanism. A half shaft tripping structure is formed between the closing pinch plate and the closing half shaft; the closing cam is matched with a main shaft crank arm on the main shaft; and a half shaft tripping structure is formed between the opening half shaft and the opening pinch plate. A vacuum circuit breaker comprises a circuit breaker frame, and a modular operating mechanism is detachably installed on the circuit breaker frame. The assembling method of the vacuum circuit breaker comprises the following steps of: installing the independently assembled modular operating mechanism into a circuit breaker frame; a switching-off pawl and a switching-on cam of the modularized operating mechanism are respectively matched with a main shaft crank arm on the main shaft, and a baffle plate of a switching-on half shaft is matched with a switching-on linkage sliding plate. Half-shaft tripping is adopted, high reliability of opening and closing actions and reliability of an interlocking function are guaranteed, and meanwhile the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a modular operating mechanism for a vacuum circuit breaker, a vacuum circuit breaker and an assembling method thereof. Background Art

[0002] The modular operating mechanism is a part of the vacuum circuit breaker. The modular operating mechanism has closing, opening and energy storage structures. The modular operating mechanism is installed separately in the circuit breaker frame to facilitate disassembly, assembly and maintenance of the vacuum circuit breaker.

[0003] Since the indoor 40.5KV vacuum circuit breaker has a wide application power supply range, in order to ensure reliability and facilitate maintenance, it is necessary to develop a new type of simple and reliable modular operating mechanism. The existing modular operating mechanism on the market has the following shortcomings:

[0004] First: The closing and opening structures are made of bearings, retaining latches, connecting rods, and bent plates, which are complex in structure. The tripping is achieved by circular contact rolling of bearings and retaining latches. If the bearing clearance is too large, it is easy to break under stress. If the clearance is too tight, the tripping force of the closing and opening will increase, resulting in the failure to close or open the gate. Once the gate cannot be opened, it will cause serious power accidents and even affect people's safety.

[0005] Second: The manual and electric energy storage structures are separate, which is complex and costly;

[0006] Third: In order to realize the function of ensuring that the circuit breaker cannot be closed when the propulsion mechanism is opened, the circuit breaker mechanism and the propulsion mechanism require many parts and components, and the structure is complicated. On the one hand, the cost is high, and on the other hand, the more parts there are, the more difficult it is to ensure reliability; therefore, it is necessary to improve the design. Summary of the invention

[0007] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a modular operating mechanism for a vacuum circuit breaker to solve the technical problems of complex structure and low reliability in previous modular operating mechanisms; at the same time, to provide a vacuum circuit breaker and an assembly method thereof to solve the technical problem of inconvenient disassembly, assembly and maintenance of previous vacuum circuit breakers.

[0008] The technical solution adopted by the present invention to solve its technical problem is:

[0009] First aspect:

[0010] A modular operating mechanism for a vacuum circuit breaker is provided, comprising:

[0011] The module bracket is detachably connected to the circuit breaker frame, and an energy storage mechanism, a closing mechanism, and an opening mechanism are arranged on the module bracket;

[0012] The energy storage mechanism includes a closing energy storage spring, an energy storage shaft, a gear shaft, an energy storage motor and a handle, wherein the energy storage shaft is connected to the closing energy storage spring, the gear shaft is meshed with the energy storage shaft, and the energy storage motor and the handle are connected to the gear shaft;

[0013] The closing mechanism includes a closing cam, a closing buckle plate and a closing half-shaft. The closing cam is arranged on the energy storage shaft. The closing buckle plate and the closing half-shaft are rotatably arranged on the module bracket. A half-shaft tripping structure is formed between the closing buckle plate and the closing half-shaft. The closing cam cooperates with the main shaft crank arm on the main shaft.

[0014] The opening mechanism includes an opening plate, an opening latch and an opening half-shaft. The opening half-shaft is rotatably arranged on the module bracket. The opening plate is arranged on the energy storage shaft. The opening latch is arranged on the opening plate and cooperates with the main shaft crank arm on the main shaft. A half-shaft release structure is formed between the opening half-shaft and the opening plate.

[0015] Furthermore, the module bracket includes a pair of module side panels and a plurality of connecting columns, and the two module side panels are fixed and connected together by the connecting columns.

[0016] Second aspect:

[0017] A vacuum circuit breaker is provided, comprising:

[0018] A circuit breaker frame, on which a main shaft and three-phase poles are arranged, and the main shaft and the three-phase poles are connected with a transmission;

[0019] The circuit breaker frame is provided with a closing interlocking rod, a closing interlocking slide plate and a locking plate of a propulsion mechanism, wherein the closing interlocking rod and the closing interlocking slide plate are arranged to move up and down on the circuit breaker frame, and the locking plate of the propulsion mechanism is arranged to rotate;

[0020] The lower end of the closing interlock rod cooperates with the main shaft, and the upper end of the closing interlock rod is suitable for cooperating with the lock plate of the propulsion mechanism;

[0021] The upper end of the closing interlocking slide plate is suitable for cooperating with the lock plate of the propulsion mechanism;

[0022] A modular operating mechanism, which is detachably mounted on the circuit breaker frame and adopts the above-mentioned modular operating mechanism;

[0023] The opening latch and closing cam of the modular operating mechanism cooperate with the main shaft, and the closing half shaft of the modular operating mechanism cooperates with the lower end of the closing interlocking slide plate through a baffle;

[0024] When the push mechanism operating valve is not opened, the push mechanism lock plate does not press down the closing interlocking slide plate, the closing interlocking slide plate is in the upper position, and the circuit breaker mechanism is controlled by the modular operating mechanism to close normally;

[0025] When the propulsion mechanism operating valve is opened, the propulsion mechanism lock plate rotates to press down the closing interlock slide plate, and the closing interlock slide plate moves to the lower position, blocking the baffle on the closing half shaft, so that the circuit breaker mechanism cannot be closed.

[0026] Furthermore, the lower end of the insulating pull rod of each pole is connected to a transmission lever, one end of the transmission lever is connected to the circuit breaker frame, and the other end is connected to a transmission connecting rod. The middle part of the transmission lever is connected to the insulating connecting rod, and the lower end of the transmission connecting rod is connected to the main shaft crank arm on the main shaft.

[0027] The third aspect:

[0028] Provided is an assembly method for the vacuum circuit breaker, firstly separately installing the main shaft, the three-phase pole, the closing interlocking rod, the closing interlocking slide plate and the locking plate of the propulsion mechanism on the circuit breaker frame;

[0029] Then install the separately assembled modular operating mechanism into the circuit breaker frame;

[0030] The opening latch and closing cam of the modular operating mechanism cooperate with the main shaft crank arm on the main shaft respectively, and the baffle of the closing half shaft cooperates with the closing interlocking slide plate.

[0031] The beneficial effects of the present invention are:

[0032] The modular operating mechanism of the present invention adopts half-shaft release for both opening and closing, and has a more reliable structure, fewer parts, a simpler structure, and relatively higher reliability. The half-shaft release is adopted to ensure high reliability of opening and closing actions and reliability of interlocking functions, while reducing manufacturing costs.

[0033] In the modular operating mechanism, electric and manual use the same gear shaft, which reduces parts, simplifies the structure, reduces costs, and has relatively higher reliability.

[0034] In the vacuum circuit breaker of the present invention, a modular operating mechanism with opening, closing and energy storage functions is installed separately in the frame, which is convenient for disassembly, assembly and maintenance while realizing the energy storage, closing and opening functions of the circuit breaker.

[0035] In the circuit breaker mechanism, the interlocking mechanism composed of the closing interlocking rod, the closing interlocking slide plate and the pushing mechanism lock plate has a simple structure and reliable and stable functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention is further described below in conjunction with the accompanying drawings.

[0037] Figure 1 It is a schematic diagram of a modular operating mechanism;

[0038] Figure 2 It is a schematic diagram of the energy storage mechanism and the opening mechanism in the modular operating mechanism;

[0039] Figure 3 It is a schematic diagram of the closing mechanism in the modular operating mechanism;

[0040] Figure 4 It is a schematic diagram of the circuit breaker in the closed, unclosed and unlocked states;

[0041] Figure 5 This is a schematic diagram of the circuit breaker opening state;

[0042] Figure 6 This is a schematic diagram of the circuit breaker closing and locking the propulsion mechanism state;

[0043] Figure 7 It is a schematic diagram of the closing of the circuit breaker locked by the propulsion mechanism;

[0044] in,

[0045] 1. Module side panel, 11. Energy storage shaft, 12. Gear shaft, 13. Energy storage motor, 14. Handle, 15. Closing energy storage spring;

[0046] 21. Opening half shaft, 22. Opening buckle plate, 23. Opening latch, 24. Second electromagnet;

[0047] 31. closing half shaft, 32. baffle, 33. closing buckle plate, 34. closing cam, 35. first electromagnet;

[0048] 4. spindle, 41. first spindle crank arm, 42. second spindle crank arm, 43. third spindle crank arm, 44. fourth spindle crank arm;

[0049] 5. Circuit breaker frame, 51. Pole, 52. Transmission lever, 53. Transmission connecting rod;

[0050] 61. Pushing mechanism lock plate, 62. Closing interlock rod, 63. Closing interlock slide plate. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0052] The present application provides a modular operating mechanism for a vacuum circuit breaker, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0053] In order to solve the technical problems of complex structure and low reliability in the modular operating mechanism in the prior art, an embodiment of the present application provides a modular operating mechanism for a vacuum circuit breaker, which is described in detail below.

[0054] like Figures 1 to 3 As shown, a modular operating mechanism for a vacuum circuit breaker includes

[0055] A module bracket, which is detachably connected to the circuit breaker frame 5, and on which an energy storage mechanism, a closing mechanism and an opening mechanism are arranged;

[0056] The energy storage mechanism includes a closing energy storage spring 15, an energy storage shaft 11, a gear shaft 12, an energy storage motor 13 and a handle 14, one end of the energy storage shaft 11 is connected to the closing energy storage spring 15, the gear shaft 12 is meshed with the energy storage shaft 11, and the energy storage motor 13 and the handle 14 are connected to the gear shaft 12;

[0057] In this embodiment, one end of the closing energy storage spring 15 is connected to the module bracket, and the other end of the closing energy storage spring 15 is connected to the energy storage shaft 11 .

[0058] In this embodiment, a large gear is provided on the energy storage shaft 11 , and the large gear is meshed with the gear shaft 12 .

[0059] The closing mechanism includes a closing cam 34, a closing plate 33 and a closing half-shaft 31. The closing cam 34 is arranged on the energy storage shaft 11. The closing plate 33 and the closing half-shaft 31 are rotatably arranged on the module bracket. A half-shaft tripping structure is formed between the closing plate 33 and the closing half-shaft 31. The closing cam 34 cooperates with the first main shaft crank arm 41 on the main shaft 4.

[0060] Specifically, in order to reduce the friction between the main shaft crank arm and the closing cam 34, a roller is provided on the main shaft crank arm, and the roller cooperates with the closing cam 34 to reduce the friction between the two.

[0061] The semi-shaft tripping structure here refers to: a semi-shaft notch is provided on the closing semi-shaft 31, and the semi-shaft notch is used to cooperate with the closing buckle plate 33. As the closing semi-shaft 31 rotates, the closing buckle plate 33 enters the semi-shaft notch. At this time, the closing buckle plate 33 and the closing cam 34 can rotate under the energy release of the closing energy storage spring 15, and the main shaft 4 is driven to rotate through the closing cam 34;

[0062] A baffle 32 is provided on the closing half-shaft 31. The baffle 32 is fastened to the end of the closing half-shaft 31 by bolts. The baffle 32 is used to cooperate with the closing interlocking slide 63 on the circuit breaker. When necessary, the baffle 32 cooperates with the closing interlocking slide 63 to limit the rotation of the closing half-shaft 31.

[0063] The opening mechanism includes an opening plate 22, an opening latch 23 and an opening half-shaft 21. The opening half-shaft 21 is rotatably arranged on the module bracket. The opening plate 22 is arranged on the energy storage shaft 11. The opening latch 23 is arranged on the opening plate 22 and cooperates with the second main shaft crank arm 42 on the main shaft 4. A half-shaft tripping structure is formed between the opening half-shaft 21 and the opening plate 22.

[0064] Specifically, in order to reduce the friction between the main shaft crank arm and the opening latch 23, a roller is provided on the main shaft crank arm, and the roller cooperates with the opening latch 23 to reduce the friction between the two.

[0065] The half-shaft tripping structure here means: a half-shaft notch is opened on the opening half-shaft 21. As the opening half-shaft 21 rotates, the opening plate 22 enters the half-shaft notch, the opening plate 22 and the opening latch 23 rotate, and the opening latch 23 disengages from the main shaft 4, so that the main shaft 4 rotates to open the switch under the action of the opening energy storage spring.

[0066] In this embodiment, the structure of the opening latch 23 on the opening pinch plate 22 is prior art and will not be described in detail herein.

[0067] The opening energy storage spring is installed on the circuit breaker frame 5. One end of the opening energy storage spring is connected to the circuit breaker frame 5, and the other end is connected to the main shaft 4. The opening energy storage spring drives the main shaft 4 to perform opening rotation.

[0068] Specifically, as an optional implementation in this embodiment, Figures 1 to 3 As shown, the module bracket includes a pair of module side panels 1 and a plurality of connecting columns, and the two module side panels 1 are fixed and connected together by the connecting columns.

[0069] The modular operating mechanism of this embodiment is independently composed into a module, which has the functions of closing, opening and energy storage. It is directly installed in the vacuum circuit breaker, which simplifies the assembly of the vacuum circuit breaker and facilitates the disassembly, assembly and maintenance of the vacuum circuit breaker.

[0070] The first electromagnet 35 and the second electromagnet 24 are respectively installed on the module bracket. The first electromagnet 35 controls the closing half shaft 31 to rotate, and the second electromagnet 24 controls the opening half shaft 21 to rotate. The modular operating mechanism is controlled by the two electromagnets to open and close.

[0071] The modular operating mechanism of the present invention adopts half-axis release for both opening and closing, and has a more reliable structure, fewer parts, a simpler structure, and relatively higher reliability. The half-axis release is adopted to ensure the high reliability of opening and closing actions and the reliability of the interlocking function, while reducing the manufacturing cost.

[0072] The energy storage transmission includes an energy storage motor 13 or a handle 14 that rotates through a common gear shaft 12 to drive the energy storage crank arm to deform the closing spring to accumulate energy, while relying on the closing cam 34 and the closing buckle plate 33 to be limited on the closing half shaft 31 to keep the closing spring energy stationary.

[0073] The present application provides a vacuum circuit breaker, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0074] In order to solve the technical problem of inconvenient disassembly and maintenance of vacuum circuit breakers in the prior art, an embodiment of the present application provides a vacuum circuit breaker, which is described in detail below.

[0075] like Figures 4 to 7 As shown, a vacuum circuit breaker is provided, comprising

[0076] A circuit breaker frame 5, on which a main shaft 4 and a three-phase pole 51 are arranged, and the main shaft 4 and the three-phase pole 51 are connected with a transmission;

[0077] The transmission connection specifically means that the lower end of the insulating pull rod of each pole 51 is connected to the transmission lever 52, one end of the transmission lever 52 is connected to the circuit breaker frame 5, and the other end is connected to the transmission connecting rod 53, the middle part of the transmission lever 52 is connected to the insulating connecting rod, and the lower end of the transmission connecting rod 53 is connected to the third main shaft crank arm 43 on the main shaft 4.

[0078] A pair of opening energy storage springs are installed on the circuit breaker frame 5, and the opening energy storage springs are connected to the main shaft 4 to drive the main shaft 4 to rotate for opening.

[0079] The circuit breaker frame 5 is provided with a closing interlocking rod 62, a closing interlocking slide 63 and a pushing mechanism lock plate 61. The closing interlocking rod 62 and the closing interlocking slide 63 are arranged to move up and down on the circuit breaker frame 5, and the pushing mechanism lock plate 61 is arranged to rotate.

[0080] The lower end of the closing interlocking rod 62 cooperates with the main shaft 4, and the upper end of the closing interlocking rod 62 is suitable for cooperating with the locking plate 61 of the propulsion mechanism;

[0081] The upper end of the closing interlocking slide plate 63 is adapted to cooperate with the propulsion mechanism lock plate 61;

[0082] A modular operating mechanism, which is detachably mounted on the circuit breaker frame 5 and adopts the above-mentioned modular operating mechanism;

[0083] The opening latch 23 and closing cam 34 of the modular operating mechanism cooperate with the main shaft 4, and the closing half shaft 31 of the modular operating mechanism cooperates with the lower end of the closing interlocking slide plate 63 through the baffle 32;

[0084] Specifically, as an optional implementation in this embodiment, Figures 4 to 7 As shown, a fourth main shaft crank arm 44 is provided on the main shaft 4, and the lower end of the closing interlocking rod 62 is connected to the fourth main shaft crank arm 44. The main shaft 4 drives the closing interlocking rod 62 to move up and down through the fourth main shaft crank arm 44.

[0085] like Figure 4 As shown, when the push mechanism operating valve is not opened, the push mechanism lock plate 61 does not press down the closing interlocking slide plate 63, the closing interlocking slide plate 63 is in the upper position, and the circuit breaker mechanism is controlled by the modular operating mechanism to perform normal closing;

[0086] At this time, the circuit breaker mechanism is closed, and the closing cam 34 drives the main shaft 4 to rotate for closing. The main shaft 4 drives the insulating pull rod of the pole 51 to move upward through the transmission connection and the transmission lever 52, so that the pole 51 is closed.

[0087] like Figure 7 As shown, when the propulsion mechanism operating valve is opened, the propulsion mechanism lock plate 61 rotates to press down the closing interlocking slide plate 63, and the closing interlocking slide plate 63 moves to the lower position to block the baffle 32 on the closing half shaft 31, so that the circuit breaker mechanism cannot be closed.

[0088] When opening the switch, the opening half shaft 21 rotates to unlock the connection of the opening buckle plate 22, so that the main shaft 4 rotates to open the switch under the load of the pole 51 and the opening energy storage spring. The main shaft 4 drives the insulating pull rod of the pole 51 to move downward through the transmission connecting rod 53 and the transmission lever 52, so that the pole 51 is disconnected to realize the opening function.

[0089] In the vacuum circuit breaker of the present invention, a modular operating mechanism with opening, closing and energy storage functions is installed separately in the frame, which is convenient for disassembly, assembly and maintenance while realizing the energy storage, closing and opening functions of the circuit breaker.

[0090] Provided is an assembly method of the vacuum circuit breaker, firstly separately installing the main shaft 4, the three-phase pole 51, the closing interlocking rod 62, the closing interlocking slide plate 63 and the pushing mechanism lock plate 61 on the circuit breaker frame 5;

[0091] There are many parts installed on the circuit breaker frame 5, which will not be fully described here and are not within the scope of protection of this patent application.

[0092] Then install the separately assembled modular operating mechanism into the circuit breaker frame 5;

[0093] The opening latch 23 and the closing cam 34 of the modular operating mechanism cooperate with the main shaft crank arm on the main shaft 4 respectively, and the baffle 32 of the closing half shaft 31 cooperates with the closing interlocking slide plate 63.

[0094] After assembly, the opening latch 23 is adjusted to cooperate with the second main shaft crank arm 42, and the closing cam 34 is adjusted to cooperate with the first main shaft crank arm 41.

[0095] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0096] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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.

[0097] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0098] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0099] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0100] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0101] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A modular operating mechanism for a vacuum circuit breaker, characterized in that: include The module bracket is detachably connected to the circuit breaker frame, and an energy storage mechanism, a closing mechanism, and an opening mechanism are arranged on the module bracket; The energy storage mechanism comprises a closing energy storage spring (15), an energy storage shaft (11), a gear shaft (12), an energy storage motor (13) and a handle (14); the energy storage shaft (11) is connected to the closing energy storage spring (15); the gear shaft (12) is meshed with the energy storage shaft (11); and the energy storage motor (13) and the handle (14) are connected to the gear shaft (12); The closing mechanism comprises a closing cam (34), a closing buckle plate (33) and a closing half-shaft (31); the closing cam (34) is arranged on the energy storage shaft (11); the closing buckle plate (33) and the closing half-shaft (31) are rotatably arranged on the module bracket; a half-shaft release structure is formed between the closing buckle plate (33) and the closing half-shaft (31); and the closing cam (34) cooperates with a main shaft crank arm on the main shaft (4); The opening mechanism comprises an opening plate (22), an opening latch (23) and an opening half shaft (21); the opening half shaft (21) is rotatably arranged on a module bracket; the opening plate (22) is arranged on an energy storage shaft (11); the opening latch (23) is arranged on the opening plate (22) and cooperates with a main shaft crank arm on a main shaft (4); a half shaft release structure is formed between the opening half shaft (21) and the opening plate (22).

2. The modular operating mechanism according to claim 1, characterized in that: The module bracket comprises a pair of module side panels (1) and a plurality of connection columns, and the two module side panels (1) are fixed and connected together via the connection columns.

3. A vacuum circuit breaker, characterized in that: include A circuit breaker frame (5), on which a main shaft (4) and a three-phase pole (51) are arranged, and the main shaft (4) and the three-phase pole (51) are connected to a transmission; The circuit breaker frame (5) is provided with a closing interlocking rod (62), a closing interlocking slide plate (63) and a propulsion mechanism lock plate (61); the closing interlocking rod (62) and the closing interlocking slide plate (63) are arranged to move up and down on the circuit breaker frame (5), and the propulsion mechanism lock plate (61) is arranged to rotate; The lower end of the closing interlocking rod (62) cooperates with the main shaft (4), and the upper end of the closing interlocking rod (62) is suitable for cooperating with the propulsion mechanism lock plate (61); The upper end of the closing interlocking slide plate (63) is adapted to cooperate with the propulsion mechanism lock plate (61); A modular operating mechanism, the modular operating mechanism is detachably mounted on the circuit breaker frame (5), and the modular operating mechanism adopts the modular operating mechanism according to claim 1; The opening latch (23) and the closing cam (34) of the modular operating mechanism cooperate with the main shaft (4), and the closing half shaft (31) of the modular operating mechanism cooperates with the lower end of the closing interlocking slide plate (63) through the baffle plate (32); When the push mechanism operating valve is not opened, the push mechanism lock plate (61) does not press down the closing interlocking slide plate (63), the closing interlocking slide plate is in the upper position, and the circuit breaker mechanism is controlled by the modular operating mechanism to close normally; When the propulsion mechanism operating valve is opened, the propulsion mechanism lock plate (61) rotates to press down the closing interlocking slide plate (63), and the closing interlocking slide plate (63) moves to the lower position to block the baffle plate (32) on the closing half shaft (31), so that the circuit breaker mechanism cannot be closed.

4. The vacuum circuit breaker according to claim 1, characterized in that: The lower end of the insulating pull rod of each pole (51) is connected to a transmission lever (52), one end of the transmission lever (52) is connected to the circuit breaker frame (5), and the other end is connected to a transmission connecting rod (53), the middle part of the transmission lever (52) is connected to the insulating connecting rod, and the lower end of the transmission connecting rod (53) is connected to the main shaft crank arm on the main shaft (4).

5. A method for assembling a vacuum circuit breaker according to claim 4, characterized in that: First, the main shaft (4), the three-phase pole (51), the closing interlocking rod (62), the closing interlocking slide plate (63) and the propulsion mechanism lock plate (61) are separately installed on the circuit breaker frame (5); Then, the separately assembled modular operating mechanism is installed into the circuit breaker frame (5); The opening latch (23) and closing cam (34) of the modular operating mechanism cooperate with the main shaft crank arm on the main shaft (4) respectively, and the baffle (32) of the closing half shaft (31) cooperates with the closing interlocking slide plate (63).

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