WO2022121360A1

WO2022121360A1 - Mechanical linkage transmission system for three-phase circuit breaker and three-phase circuit breaker

Info

Publication number: WO2022121360A1
Application number: PCT/CN2021/113047
Authority: WO
Inventors: 马志强; 赵艳涛; 秦晓宇; 刘分; 秦政敏; 张垒; 史春玲; 吴振杰; 胡天宝; 孙金奇
Original assignee: 河南平芝高压开关有限公司; 平高集团有限公司; 国家电网有限公司
Priority date: 2020-12-11
Filing date: 2021-08-17
Publication date: 2022-06-16
Also published as: CN114628188B; CN114628188A

Abstract

The present invention relates to a mechanical linkage transmission system for a three-phase circuit breaker and the three-phase circuit breaker. The mechanical linkage transmission system comprises: an assembling rack; and a three-phase synchronous transmission mechanism, which comprises three single-phase rotating shafts, wherein each single-phase rotating shaft is respectively provided with an output crank arm and a synchronous linkage crank arm, and two synchronous linkage crank arms of any two adjacent single-phase rotating shafts are in transmission connection by means of an interphase connecting rod. The mechanical linkage transmission system also comprises an operating mechanism, wherein the operating mechanism is provided with a power output shaft, the power output shaft drives a driving rotating shaft by means of an intermediate transmission mechanism to rotate, and the driving rotating shaft drives the other two single-phase rotating shafts by means of the interphase connecting rod to rotate, thereby achieving a three-phase synchronous action. By using the assembling rack, the operating mechanism and the three-phase synchronous transmission mechanism can be mounted on the assembling rack in advance so as to form a pre-assembled module and then the entire pre-assembled module is fixedly assembled with a mounting base plate at the rear end of the three-phase circuit breaker. The assembling process can be effectively simplified, the assembling efficiency is increased, and the modular design of the three-phase circuit breaker is facilitated.

Description

Mechanical linkage transmission system for three-phase circuit breaker and three-phase circuit breaker

technical field

The invention belongs to the technical field of high-voltage switches, and in particular relates to a mechanical linkage transmission system for a three-phase circuit breaker and a three-phase circuit breaker.

Background technique

With the development of the global power system and the increasing requirements for the reliability of power system operation, the gas-insulated metal-enclosed switchgear (GIS) of sulfur hexafluoride is characterized by its compact structure, high reliability and earthquake resistance. It has the advantages of good performance, low noise and low maintenance workload, and is not affected by external environmental conditions, and is widely used in power systems.

Most of the current circuit breakers for 252kV GIS are of phase-separated design, each phase is equipped with one mechanism, and one three-phase circuit breaker needs to be equipped with three operating mechanisms, and the production cost is high. Electrical linkage is used between the three phases. Since the electrical linkage is affected by many external factors, it is prone to non-full-phase operation, which affects the safety of the power supply system. In response to this problem, there are also three-phase mechanical linkages in the prior art. The linkage is to realize the opening and closing operation of the three-phase circuit breaker through the mechanical connection of the transmission link and other components, improve the reliability of the three-phase synchronization, avoid non-full-phase operation, and fundamentally avoid the unreliability of the three-phase electrical linkage. Moreover, using one operating mechanism to control the three-phase circuit breaker reduces the manufacturing cost of the three-phase circuit breaker. In fact, in the existing three-phase mechanical linkage transmission system, components such as the operating mechanism and the transmission link are independently installed on the three-phase circuit breaker body, which makes the installation of the circuit breaker complicated and cumbersome, which is not conducive to the Modular production of circuit breakers.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a mechanical linkage transmission system for a three-phase circuit breaker, so as to solve the problem that the components such as the operating mechanism and the transmission link in the three-phase mechanical linkage transmission system in the prior art are independently connected to the three-phase circuit breaker. The installation of the main body leads to the technical problem that the installation is cumbersome and is not conducive to modular production; at the same time, the present invention also provides a three-phase circuit breaker using the above-mentioned mechanical linkage transmission system.

In order to achieve the above purpose, the technical scheme of the mechanical linkage transmission system for the three-phase circuit breaker provided by the present invention is: the mechanical linkage transmission system for the three-phase circuit breaker includes:

Assembly rack, used for fixed installation on the mounting base plate at the rear end of the three-phase circuit breaker;

Three-phase synchronous transmission mechanism, including three single-phase rotating shafts, spaced along the left and right directions, corresponding to the three column circuit breakers arranged in the left and right directions on the three-phase circuit breaker, each single-phase rotating shaft is hinged On the assembling frame, the hinge center axis of the single-phase rotating shaft extends along the up-down direction;

Each single-phase rotating shaft is provided with an output crank arm and a synchronous linkage crank arm respectively. The output crank arm is hinged with the rear end of the connecting rod assembly, and the front end of the connecting rod assembly is provided with a hinged connection part, which is used for connecting with the corresponding column circuit breaker after The straight-acting rods extending from the ends are hingedly connected;

The two synchronous linkage crank arms of any adjacent two single-phase rotating shafts are connected by interphase connecting rod transmission, and the two ends of the interphase connecting rod are hingedly connected with the two synchronous linkage crank arms correspondingly;

The operating mechanism is fixed on the assembly frame, the operating mechanism has a power output shaft, one of the three single-phase rotating shafts is an active rotating shaft, the other two are driven rotating shafts, and the power output shafts The active rotating shaft is driven to rotate through the intermediate transmission mechanism, and the active rotating shaft drives the other two single-phase rotating shafts to rotate through the interphase connecting rod, thereby realizing three-phase synchronous action.

The beneficial effect is: in the mechanical linkage transmission system for the three-phase circuit breaker provided by the present invention, by using the assembly frame, the operating mechanism and the three-phase synchronous transmission mechanism can be pre-installed on the assembly frame to form a pre-installed module. The entire pre-installed module is fixedly assembled with the installation substrate at the rear end of the three-phase circuit breaker, which can effectively simplify the assembly process, improve the assembly efficiency, and is conducive to the modular design of the three-phase circuit breaker.

As a further improvement, the assembling frame includes two main plates arranged in parallel and spaced apart, a support connection part is arranged between the two main plates, the three single-phase rotating shafts are all hinged on the two main plates, and the two driven rotating shafts are all hinged on the two main plates. , The two-phase connecting rod and the three connecting rod assemblies are located between the two main splints.

The beneficial effects are: the space formed by the two main splints is used to form a space for accommodating the components of the three-phase synchronous transmission mechanism, which can form effective protection.

As a further improvement, the two main splints include an upper splint and a lower splint, the operating mechanism is horizontally fixed outside the upper splint, the operating mechanism extends along the left and right directions, and the power output shaft moves straightly and telescopically along the left and right directions. , among the three single-phase rotating shafts, the single-phase rotating shaft that is in the side phase and is the closest to the power output shaft is the active rotating shaft. A segment is drivingly connected to the PTO shaft.

The beneficial effects are as follows: the operating mechanism is horizontally arranged along the left and right directions, and the power output shaft is connected with the active rotating shaft in the side phase through transmission, which facilitates the arrangement of the operating mechanism.

As a further improvement, a power input crank arm is provided on the outrigger shaft section, and the power input crank arm is connected to the power output shaft through a power input connecting rod. The shafts are hingedly connected, and a guide structure is fixed on the upper clamping plate to guide the reciprocating movement of the power output shaft along the left and right directions.

The beneficial effects are as follows: the guiding structure is arranged to guide the movement of the power output shaft, so as to ensure the action accuracy, and it is also convenient to drive the active rotating shaft to rotate through the power input link and the power input crank arm.

As a further improvement, an opening and closing indicating device is provided on the outstretched shaft section or the power input arm, which is used to indicate the opening and closing state of the three-phase circuit breaker.

The beneficial effects are: it is convenient to set the opening and closing indicating device on the extending shaft section or the power input arm, so as to conveniently indicate the opening and closing state.

As a further improvement, the assembling rack has a front connecting plate, the front ends of the two main plates are respectively fixedly connected to the front connecting plate, and the front connecting plate is used for fixedly connecting with the mounting base plate, and the front connecting plate The board is provided with an avoidance structure for avoiding the corresponding straight-moving rod.

The beneficial effects are: the front connecting plate of the assembling rack is used to facilitate the fixed connection with the corresponding installation substrate.

As a further improvement, in the circumferential direction of each single-phase rotating shaft, the synchronous linkage arm on each single-phase rotating shaft is located on the front side of the output arm on the same single-phase rotating shaft, and the interphase connecting rod is located on the three single-phase rotating shafts. front side.

The beneficial effects are: for each single-phase rotating shaft, under the condition of ensuring the rotation range of the output crank arm, the synchronous linkage crank arm is located on the front side of the output crank arm, which can reduce the space size occupied by the mechanical linkage system as much as possible.

As a further improvement, each single-phase rotating shaft is fixedly assembled with a crank arm, and the crank arm is integrally provided with the output crank arm and the synchronous linkage crank arm.

The beneficial effects are as follows: the output crank arm and the synchronous linkage crank arm are integrally set by using the crank arm piece, which is convenient for processing and manufacture, and also convenient for fixed installation.

As a further improvement, the mechanical linkage transmission system also includes a protective cover, the protective cover is provided outside the assembly frame and the operating mechanism, and the assembly frame includes a fixed support portion, and the fixed support portion is used for connecting with the rear end of the three-phase circuit breaker. The mounting base plate is fixedly connected, the fixed support part is located below the operating mechanism in the up-down direction, and protrudes forward from the operating mechanism in the front-rear direction. The protective cover includes a front cover body and a rear cover assembled separately. The front cover is arranged outside the fixed support part, the upper end of the front cover is arranged obliquely, the rear cover is arranged outside the operating mechanism and the assembling frame, and an inspection cover door is arranged on the rear cover.

The beneficial effect is: the protective cover is designed into a front cover body and a rear cover body assembled in separate parts, so that it is convenient to select cover bodies with different volumes and shapes according to different actual assembly positions, so that the cover body can better fit the assembly frame and operate. mechanism to minimize the space occupied by the protective cover.

The technical scheme of the three-phase circuit breaker provided by the present invention is: the three-phase circuit breaker includes:

The main body of the three-phase circuit breaker includes three column circuit breakers that are relatively fixedly assembled together, which are arranged in turn in the left and right directions to correspond to the three phases. Each column circuit breaker extends in the front and rear directions. The ends are sealed and penetrated with a direct-acting rod, and the direct-acting rod is telescopic in the front and rear directions to input the opening and closing driving force to the column circuit breaker;

The rear end of the three-phase circuit breaker body is provided with an installation base plate, and a mechanical linkage transmission system is fixed on the installation base plate, and the mechanical linkage transmission system includes:

Assemble the rack, which is fixedly installed on the mounting base plate at the rear end of the three-phase circuit breaker;

The three-phase synchronous transmission mechanism includes three single-phase rotating shafts, which are distributed at intervals along the left and right directions, corresponding to the three column circuit breakers arranged in sequence along the left and right directions on the three-phase circuit breaker. On the assembling frame, the hinged central axis of the single-phase rotating shaft extends along the up-down direction;

Each single-phase rotating shaft is provided with an output crank arm and a synchronous linkage crank arm respectively. The output crank arm is hinged with the rear end of the connecting rod assembly, and the front end of the connecting rod assembly is provided with a hinged connection part, which extends with the rear end of the corresponding column circuit breaker. The outgoing direct-acting rod is hingedly connected;

The beneficial effects are: in the three-phase circuit breaker provided by the present invention, the mechanical linkage system is fixedly installed on the mounting base plate at the rear end of the three-phase circuit breaker body, and in the mechanical linkage transmission system, the assembly frame can be used to pre-assemble the operation The mechanism and the three-phase synchronous transmission mechanism are installed on the assembly frame to form a pre-installed module. The entire pre-installed module is fixedly assembled with the installation substrate at the rear end of the three-phase circuit breaker, which can effectively simplify the assembly process and improve the assembly efficiency, which is beneficial to the three-phase circuit breaker. Modular design of circuit breakers.

As a further improvement, an opening and closing indicating device is provided on the outer extending shaft section or the power input arm, which is used to indicate the opening and closing state of the three-phase circuit breaker.

Description of drawings

1 is a schematic structural diagram of a three-phase circuit breaker provided by the present invention;

Fig. 2 is the front view of Fig. 1;

FIG. 3 is a schematic structural diagram of the assembly frame installed at the rear end of the three-phase circuit breaker body in FIG. 1;

4 is a schematic structural diagram of a pre-installed module formed by an assembly frame, an operating mechanism and a three-phase synchronous transmission mechanism in FIG. 3;

FIG. 5 is a schematic structural diagram of another angle of the pre-installed module shown in FIG. 4;

Fig. 6 is the structural representation of the assembly rack in Fig. 5;

Fig. 7 is the assembly schematic diagram of the direct-acting rod and the three-phase synchronous transmission mechanism in Fig. 3;

FIG. 8 is a schematic structural diagram of the protective cover in FIG. 1 .

Description of reference numbers:

1. Driven shaft; 2. Active shaft; 3. Arm part; 31. Output arm; 32. Synchronous linkage arm; 4. Connecting rod assembly; 5. Interphase connecting rod; 6. Opening and closing indicating device; 7. Power input arm; 8. Power input connecting rod; 10, Single-phase shaft; 100, Column circuit breaker; 101, Installation base plate; 102, Three-phase circuit breaker bracket; 103, Direct-acting rod; 200, Protective cover ; 201, the front cover; 202, the rear cover; 203, the inspection cover door; 204, the observation window; 300, the assembly frame; 301, the upper splint; 302, the lower splint; 303, the middle support; plate; 305, fixed support part; 306, right mechanism support frame; 307, positioning bushing; 308, guide seat; 309, guide rod; 310, shaft hole; 312, avoidance structure; 313, left mechanism support frame; 400, an operating mechanism; 401, a power take-off shaft; 500, a three-phase synchronous transmission mechanism.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising a..." does not exclude processes, methods, and methods that include said element.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, It can be connected in one piece; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the term "provided" that may appear should be understood in a broad sense. It is arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. Those skilled in the art can understand the specific meanings of the above terms in the present invention through specific situations.

The present invention will be further described in detail below in conjunction with the embodiments.

The specific embodiment 1 of the three-phase circuit breaker provided by the present invention:

In the three-phase circuit breaker in this embodiment, a pre-installed module is fixedly assembled at the rear end of the main body of the three-phase circuit breaker. The pre-installed module here includes an assembly frame 300, and a three-phase synchronous drive is pre-installed on the assembly frame 300. In the mechanism 500 and the operating mechanism 400, the pre-installed modules are fixedly installed on the mounting base plate 101 at the rear end of the three-phase circuit breaker main body, and the connecting rods 4 on the three-phase synchronous transmission mechanism 500 are assembled with each phase column circuit breaker 100. The straight-acting rod 103 extending from the rear end is connected by transmission, and the operating mechanism 400 drives the three column circuit breakers 100 to open and close synchronously through the three-phase synchronous transmission mechanism 500. The mechanical linkage is used to effectively ensure the three-phase synchronization.

As shown in FIGS. 1 to 8 , in this embodiment, the three-phase circuit breaker specifically includes a three-phase circuit breaker main body and a mechanical linkage transmission system. The mechanical linkage transmission system includes a pre-installed module and a protective cover 200 , and the three-phase circuit breaker main body includes three There are three column circuit breakers 100, three column circuit breakers 100 are sequentially arranged in the left-right direction to correspond to the three-phase, and the three column circuit breakers 100 are correspondingly fixed on the three-phase circuit breaker bracket 102, so that the three column circuit breakers 100 The circuit breakers 100 are relatively fixedly assembled together.

Each column-type circuit breaker 100 extends in the front-rear direction, and a moving end and a static end are arranged inside, and the two form an isolation fracture. The rear end of the straight-acting rod 103 is sealed out, and the direct-acting rod 103 telescopically moves in the front-rear direction to input the opening and closing driving force to the column circuit breaker 100, where the rear end of the direct-acting rod 103 is used for assembling with the corresponding connecting rod 4 is hinged, so that the operating mechanism 400 drives the linear motion rod 103 to move back and forth through the three-phase synchronous transmission mechanism 500.

In this embodiment, the pre-installed module includes an assembly frame 300, an operating mechanism 400, and a three-phase synchronous transmission mechanism 500. The assembly frame 300 is used as the frame body, and the operating mechanism 400 and the three-phase synchronous transmission mechanism 500 are correspondingly installed on the On the assembly rack 300, a pre-installed module is formed, which is convenient to be integrally installed on the mounting base plate 101 at the rear end of the three-phase circuit breaker body, which is convenient for installation and can effectively improve the assembly efficiency.

The assembly frame 300 is a welded frame body as a whole, and is mainly made of steel plates, steel pipes, HW section steels, rectangular steels and other profiles that are tailor-welded, and then machined on them. In terms of structure, the assembly rack 300 mainly includes two main plates and a front connecting plate 304. The two main plates are an upper plate 301 and a lower plate 302. The two main plates are arranged in parallel, and a support connecting part is arranged between the two main plates. , so that the two main plates are arranged at intervals to form an accommodating space for accommodating some components of the three-phase synchronous transmission mechanism 500 therein.

The front ends of the two main plates are connected to the front connecting plate 304 by welding, and a reinforcing rib plate is also provided at the connecting position of the main board and the front connecting plate 304 . The front connecting plate 304 is used to be fixedly assembled with the mounting substrates 101 at the rear ends of the three column circuit breakers 100 , and may be connected by welding or bolts, which will not be described in detail here.

It should be noted here that the three single-phase rotating shafts 10, the connecting rod assembly 4 and other components in the three-phase synchronous transmission mechanism 500 are all installed between the two main plates. In order to facilitate the rotation and assembly of the two slightly shorter driven shafts 1, corresponding through shaft holes 310 are provided on the two main plates. For the installation hole, a positioning bushing 307 is also fixed on the upper splint 301 . In order to improve the support stability, a rib plate is arranged outside the positioning shaft sleeve 307 .

In addition, in order to effectively support the operating mechanism 400, since the operating mechanism 400 here is arranged horizontally and extends in the left-right direction, a left-side mechanism support frame 313 and a right-side mechanism support frame 306 are fixed on the upper splint 301 , the left mechanism support frame 313 is welded on the upper splint 301, and the right mechanism support frame 306 has an L-shaped transverse section, including a transverse plate extending in the front-rear direction and a longitudinal plate extending in the left-right direction, a transverse plate and a longitudinal plate. It can be connected by welding or integrally bent and formed, and both the horizontal plate and the vertical plate are fixed on the upper splint 301. In order to improve the connection strength, the right end of the vertical plate is also welded to the outer peripheral surface of the positioning shaft sleeve 307, and the horizontal plate is provided with The avoidance hole is used to avoid structures such as the power output shaft 401 and the power input connecting rod 8 .

In addition, a guide seat 308 is also fixedly installed on the horizontal plate, and a guide rod 309 extending in the left and right direction is fixed on the guide seat 308 to guide the power output shaft 401 to reciprocate in the left and right direction to ensure the operation accuracy.

The operating mechanism 400 is specifically a disc spring hydraulic operating mechanism, which is arranged horizontally and extends in the left-right direction. The left end of the operating mechanism 400 is fixedly installed on the left-side mechanism support frame 313 by bolts, and the operating mechanism 400 itself has a support The support frame is bolted to the right mechanism support frame 306 , so that the operating mechanism 400 is fixedly installed on the assembly frame 300 .

The power output shaft 401 of the operating mechanism 400 moves straightly and telescopically in the left and right directions. A fixed block is fixed on the power output shaft 401. The fixed block is guided and assembled with the guide rod 309, thereby forming a guide for the power output shaft 401 to ensure the telescopic action. precision.

The power output shaft 401 drives the rotating shaft to rotate through an intermediate transmission mechanism. The intermediate transmission mechanism here includes a power input link 8 and a power input arm 7. The right end of the power output shaft 401 is hinged to a power input link 8, and the power input link 8 The right end of the power input crank arm 7 is hingedly connected, and the power input crank arm 7 is fixedly installed on the active shaft 2. When the power output shaft 401 moves directly and telescopically, the power input connecting rod 8 and the power input crank arm 7 are synchronized to the three-phase. The transmission mechanism 500 inputs a driving force.

The three-phase synchronous transmission mechanism 500 includes three single-phase rotating shafts 10 , three arm members 3 , three connecting rod assemblies 4 and two interphase connecting rods 5 .

Wherein, the three single-phase rotating shafts 10 here are distributed at intervals along the left and right directions, and are used to correspond to the three column circuit breakers 100 arranged in sequence along the left and right directions on the three-phase circuit breaker, and each single-phase rotating shaft 10 is hinged On the assembling frame 300, the hinge center axis of each single-phase rotating shaft 10 extends in the up-down direction. Among them, one of the three single-phase rotating shafts 10 is the driving rotating shaft 2, which is longer in size, the other two are the driven rotating shafts 1, and the driving rotating shaft 2 is the C-phase rotating shaft, which is located in the side-phase position and is arranged close to the power output shaft 401. , the other two driven shafts 1 are the A-phase shaft and the B-phase shaft, wherein the B-phase shaft is the middle-phase shaft, and the A-phase shaft is the other side-phase shaft.

The two driven shafts 1 are rotatably assembled in the shaft holes 310 of the two main plates, and the active shaft 2 is rotatably assembled in the positioning sleeve 307 and the positioning holes. Moreover, the driving shaft 2 has an overhang extending upward through the upper plate 301. On the shaft section, a power input crank arm 7 is fixed coaxially on the outrigger shaft section, and the power input crank arm 7 is connected with the power output shaft 401 through the power input link 8. The arm 7 and the power output shaft 401 are hingedly connected. In addition, in this embodiment, an opening and closing indicating device 6 is provided on the power input arm 7 for indicating the opening and closing state of the three-phase circuit breaker.

On the shaft sections of the three single-phase rotating shafts 10 located between the two main plates, a crank arm member 3 is respectively fixed and assembled, and the crank arm member 3 is integrally provided with an output crank arm 31 and a synchronous linkage crank arm 32, and, In the circumferential direction of each single-phase rotating shaft 10 , the synchronous linkage arm 32 on each single-phase rotating shaft 10 is located on the front side of the output arm 31 on the same single-phase rotating shaft 10 .

Each output crank arm 31 is respectively connected to the corresponding direct-acting rod 103 from the rear end of the column circuit breaker 100 through the connecting rod assembly 4. The front end of the connecting rod assembly 4 is hinged with the corresponding direct-acting rod 103, and the rear end is The corresponding output arm 31 is hinged, and the length of the connecting rod assembly 4 here is adjustable. Specifically, the length adjustment can be realized by the bidirectional screw structure. The bidirectional screw structure can include a middle screw sleeve and two screws on both sides. The direction of rotation is opposite, and the inner screw sleeve is provided with thread segments on both sides of the opposite direction, so as to correspond to the screw threads on both sides. When the length is adjusted, the middle screw sleeve can be rotated forward and reverse to realize the length adjustment of the connecting rod assembly.

For any adjacent two single-phase rotating shafts 10, the two synchronous linkage arms 32 are connected by transmission through the interphase link 5, and the two ends of the interphase link 5 are hingedly connected to the two synchronous linkage arms 32. The synchronous linkage arm 32 on the phase rotating shaft 10 is located on the front side of the output arm 31 on the same single-phase rotating shaft 10, so that the interphase connecting rods 5 are located on the front side of the three single-phase rotating shafts 10 (the front side is close to the column circuit breaker). 100 side), thereby reducing the front and rear dimensions of the pre-installed modules as much as possible. In this embodiment, the interphase connecting rod 5 is an I-shaped structure, which is a connecting rod structure commonly used in the field, and will not be repeated here.

It should be noted that, since the connecting rod assembly 4 needs to pass through the assembly frame 300 to be hingedly connected with the corresponding straight-moving rod 103 , a corresponding avoidance structure 312 is provided on the assembly frame 300 to avoid the connecting rod assembly 4 , to achieve normal installation.

In this embodiment, the mechanical linkage transmission system further includes a protective cover 200 , and the protective cover 200 is covered outside the assembly frame 300 and the operating mechanism 400 . In fact, the assembly frame 300 includes a fixed support portion 305 , and the fixed support portion 305 It mainly includes the front parts of the two main splints and the front connecting plate 304. The fixed support part 305 here is used for fixed connection with the installation substrate 101 at the rear end of the three-phase circuit breaker, and the fixed support part 305 is located below the operating mechanism 400 in the up-down direction. , protruding forward from the operating mechanism 400 in the front-rear direction. Corresponding to this special structure, the protective cover 200 here includes a front cover body 201 and a rear cover body 202 assembled separately. The front cover body 201 covers Outside the fixed support portion 305 , the upper end of the front cover 201 is arranged obliquely, and the rear cover 202 is covered outside the operating mechanism 400 and the assembling frame 300 . This arrangement can reduce the space occupied by the protective cover 200 as much as possible, and also reduce the the size of the shield 200 itself. An inspection cover door 203 is provided at the rear end of the rear cover body 202, and an observation window 204 is also provided. Using the observation window 204, it is convenient to observe the oil of the disc spring hydraulic operating mechanism without opening the inspection cover door 203. signs, counters and opening and closing signs.

When assembling, after the pre-installed module is assembled, the front cover body 201 can be put on the pre-installed module first, and the front cover body 201 can be moved backward. After the connection plate 304 and the mounting base 101 are fixedly assembled, the front end of the front cover 201 is fixedly assembled with the mounting base 101, and the rear cover 202 is covered outside the assembly frame 300 and the operating mechanism 400, and then the front cover is assembled The body 201 and the rear cover body 202 can be fixedly assembled together.

When in use, when opening and closing operations are required, the operating mechanism 400 acts according to the command, the power output shaft 401 drives the active shaft 2 to rotate through the power input link 8 and the power input arm 7, and the active shaft 2 passes through the interphase link 5. The other two driven shafts 1 are driven to rotate synchronously, and the connecting rod assembly 4 is driven to move by the three output crank arms 31 on the three crank arm parts 3, and the connecting rod assembly 4 moves directly in the front-rear direction through the straight-moving rod 103, Accurate and synchronous opening and closing operations of the three column circuit breakers 100 are realized.

The specific embodiment 2 of the three-phase circuit breaker provided by the present invention:

The main difference between it and Embodiment 1 is that in Embodiment 1, the operating mechanism is a disc spring hydraulic operating mechanism. In this embodiment, the operating mechanism can also be an electromagnetic operating mechanism, which can also adopt a horizontal arrangement. Of course, it can also be designed in a vertical arrangement according to actual needs. Of course, the active rotating shaft can also be selected as a mid-phase rotating shaft according to actual needs.

The specific embodiment 3 of the three-phase circuit breaker provided by the present invention:

The main difference between it and Embodiment 1 is that in Embodiment 1, the assembly frame includes two main plates, which is convenient to form an interval for placing two driven rotating shafts, interphase connecting rods and connecting rod assembly, which can effectively form protection. In this embodiment, the assembling frame can also be all rod frame structure, instead of using steel plate, it is mainly made of welded section steel.

The specific embodiment 4 of the three-phase circuit breaker provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, the power output shaft of the operating mechanism is guided by a guide rod. In other embodiments, the power output shaft can also be guided by the operating mechanism itself, and there is no need to provide a guide rod and a guide seat.

The specific embodiment 5 of the three-phase circuit breaker provided by the present invention:

The main difference between it and Embodiment 1 is that in Embodiment 1, the opening and closing indicating device is fixedly installed on the power input arm. In this embodiment, the opening and closing indicating device can be fixedly installed on the top end of the extending shaft section of the active rotating shaft in the side phase.

The specific embodiment 6 of the three-phase circuit breaker provided by the present invention:

The main difference from Embodiment 1 is that in Embodiment 1, the output crank arm and the synchronous linkage crank arm are integrally provided on the crank arm member. In this embodiment, the output crank arm and the synchronous linkage crank arm are arranged separately, and the two can be fixedly installed on the corresponding rotating shafts respectively.

In the embodiment of the mechanical linkage transmission system for a three-phase circuit breaker provided by the present invention, the structure of the mechanical linkage transmission system in this embodiment is the same as the structure of the mechanical linkage transmission system in the above-mentioned embodiment 1 of the three-phase circuit breaker, and is not repeated here. Repeat. Of course, in other embodiments, the structure of the mechanical linkage transmission system in any of the foregoing three-phase circuit breaker embodiments 2 to 6 may also be used, and details are not described herein again.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will still Modifications may be made to the technical solutions described in the foregoing embodiments without creative efforts, or equivalent replacements may be made to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

A mechanical linkage transmission system for a three-phase circuit breaker, characterized in that it includes:

an assembling frame (300) for being fixedly mounted on the mounting base plate (101) at the rear end of the three-phase circuit breaker;

A three-phase synchronous transmission mechanism (500) includes three single-phase rotating shafts (10), which are distributed at intervals along the left-right direction, and are used for phase with three column-type circuit breakers (100) arranged in sequence along the left-right direction on the three-phase circuit breaker. Correspondingly, each single-phase rotating shaft (10) is hinged on the assembling frame (300), and the hinged central axis of the single-phase rotating shaft (10) extends in the up-down direction;

Each single-phase rotating shaft (10) is respectively provided with an output crank arm (31) and a synchronous linkage crank arm (32), the output crank arm (31) is hinged with the rear end of the connecting rod assembly (4), and the connecting rod assembly (4) The front end of the ) is provided with a hinged connection part for hinged connection with the direct-acting rod (103) extending from the rear end of the corresponding column circuit breaker (100);

The two synchronous linkage arms (32) of any adjacent two single-phase rotating shafts (10) are connected by transmission through an interphase link (5), and both ends of the interphase link (5) are correspondingly hinged with the two synchronous linkage arms (32). connect;

An operating mechanism (400) is fixed on the assembling frame (300), the operating mechanism (400) has a power output shaft (401), one of the three single-phase rotating shafts (10) It is the driving shaft (2), and the other two are driven shafts (1). The power output shaft (401) drives the driving shaft (2) to rotate through the intermediate transmission mechanism, and the driving shaft (2) passes through the interphase connecting rod (5). ) drives the other two single-phase rotating shafts (10) to rotate, thereby realizing three-phase synchronous action.
The mechanical linkage transmission system for a three-phase circuit breaker according to claim 1, characterized in that, the assembly frame (300) comprises two main clamping plates arranged in parallel and spaced apart, and a support connection part is arranged between the two main clamping plates, so that the The three single-phase rotating shafts (10) are hinged on the two main clamping plates, and the two driven rotating shafts (1), the two-phase connecting rods (5), and the three connecting rod assemblies (4) are all located between the two main clamping plates.
The mechanical linkage transmission system for a three-phase circuit breaker according to claim 2, characterized in that the two main clamping plates include an upper clamping plate (301) and a lower clamping plate (302), and the operating mechanism (400) is a horizontal type. It is fixed outside the upper splint (301), the operating mechanism (400) extends along the left-right direction, the power output shaft (401) moves straightly expands and contracts along the left-right direction, and the three single-phase rotating shafts (10) are in the side phase and are connected with the The single-phase rotating shaft (10) closest to the power output shaft (401) is the active rotating shaft (2). The shaft segment is drive-connected with the power output shaft (401).
The mechanical linkage transmission system for a three-phase circuit breaker according to claim 3, characterized in that, a power input arm (7) is provided on the outrigger shaft section, and the power input arm (7) passes through a power input link ( 8) Drive connection with the power output shaft (401), both ends of the power input connecting rod (8) are hingedly connected with the power input arm (7) and the power output shaft (401), and the upper splint (301) is fixed on the There is a guide structure for guiding the power output shaft (401) to reciprocate in the left-right direction.
The mechanical linkage transmission system for a three-phase circuit breaker according to claim 4, characterized in that an opening and closing indicating device (6) is provided on the outrigger shaft section or the power input arm (7) for indicating the three-phase circuit breaker. The opening and closing status of the phase circuit breaker.
The mechanical linkage transmission system for a three-phase circuit breaker according to any one of claims 2 to 5, wherein the assembling frame (300) has a front connecting plate (304), and the front ends of the two main plates are They are respectively fixedly connected to the front connecting plate (304), the front connecting plate (304) is used to be fixedly connected to the mounting base plate (101), and the front connecting plate (304) is provided with a corresponding linear rod ( 103) of the avoidance structure (312).
The mechanical linkage transmission system for a three-phase circuit breaker according to any one of claims 2 to 5, characterized in that, in the circumferential direction of each single-phase rotating shaft (10), the synchronous linkage hinge on each single-phase rotating shaft (10) The arm (32) is located on the front side of the output crank arm (31) on the same single-phase rotating shaft (10), and the interphase connecting rods (5) are located on the front side of the three single-phase rotating shafts (10).
The mechanical linkage transmission system for a three-phase circuit breaker according to any one of claims 1 to 5, characterized in that each single-phase rotating shaft (10) is fixedly assembled with a crank arm member (3), the crank arm member (3) ) is integrally provided with the output crank arm (31) and the synchronous linkage crank arm (32).
The mechanical linkage transmission system for a three-phase circuit breaker according to claim 3, 4 or 5, characterized in that the mechanical linkage transmission system further comprises a protective cover (200), and the protective cover (200) covers the assembly frame (300) In addition to the operating mechanism (400), the assembling frame (300) includes a fixed support part (305), and the fixed support part (305) is used for fixed connection with the installation base plate (101) at the rear end of the three-phase circuit breaker, and the fixed support part (305). The part (305) is located below the operating mechanism (400) in the up-down direction, and protrudes forwardly from the operating mechanism (400) in the front-rear direction, and the protective cover (200) includes a separately assembled front cover. A cover body (201) and a rear cover body (202), the front cover body (201) is covered outside the fixed support portion (305), the upper end of the front cover body (201) is arranged obliquely, and the rear cover body (202) is covered at the In addition to the operating mechanism (400) and the assembling frame (300), the rear cover body (202) is provided with an inspection cover door (203).
Three-phase circuit breakers, including:

The main body of the three-phase circuit breaker includes three column circuit breakers (100) that are relatively fixedly assembled together, and are sequentially arranged in the left and right directions to correspond to the three phases, and each column circuit breaker (100) extends in the front and rear directions, and each The rear end of the column-type circuit breaker (100) is sealed and protruded with a straight-acting rod (103), and the direct-acting rod (103) is telescopically moved in the front-rear direction, so as to input the opening and closing driving force to the column-type circuit breaker (100);

It is characterized in that the rear end of the three-phase circuit breaker body is provided with an installation base plate (101), and a mechanical linkage transmission system is fixed on the installation base plate (101), and the mechanical linkage transmission system adopts the mechanical linkage transmission system described in any one of claims 1 to 9. A mechanical linkage transmission system for a three-phase circuit breaker, a three-phase connecting rod assembly (4) in the mechanical linkage transmission system for a three-phase circuit breaker is drivingly connected with the direct-acting rods (103) of the three column circuit breakers (100) in one-to-one correspondence , so that the three direct-acting rods (103) are driven synchronously by the operating mechanism (400) through the three-phase synchronous transmission mechanism (500).