WO2022121360A1 - Système de transmission à liaison mécanique pour disjoncteur triphasé, et disjoncteur triphasé - Google Patents

Système de transmission à liaison mécanique pour disjoncteur triphasé, et disjoncteur triphasé Download PDF

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Publication number
WO2022121360A1
WO2022121360A1 PCT/CN2021/113047 CN2021113047W WO2022121360A1 WO 2022121360 A1 WO2022121360 A1 WO 2022121360A1 CN 2021113047 W CN2021113047 W CN 2021113047W WO 2022121360 A1 WO2022121360 A1 WO 2022121360A1
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WO
WIPO (PCT)
Prior art keywords
phase
circuit breaker
transmission system
phase circuit
mechanical linkage
Prior art date
Application number
PCT/CN2021/113047
Other languages
English (en)
Chinese (zh)
Inventor
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
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Filing date
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Application filed by 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 filed Critical 河南平芝高压开关有限公司
Publication of WO2022121360A1 publication Critical patent/WO2022121360A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/022—Details particular to three-phase circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/46—Interlocking mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/46—Interlocking mechanisms
    • H01H33/50—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms

Definitions

  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • 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
  • the power output shaft moves straightly and telescopically along the left and right directions.
  • 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 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.
  • 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 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.
  • 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.
  • 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 front connecting plate of the assembling rack is used to facilitate the fixed connection with the corresponding installation substrate.
  • each single-phase rotating shaft 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.
  • 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.
  • 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 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 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:
  • 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.
  • 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 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 mechanical linkage system is fixedly installed on the mounting base plate at the rear end of the three-phase circuit breaker body
  • 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 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 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 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.
  • 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
  • the power output shaft moves straightly and telescopically along the left and right directions.
  • 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 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.
  • 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 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.
  • 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.
  • 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.
  • 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 front connecting plate of the assembling rack is used to facilitate the fixed connection with the corresponding installation substrate.
  • each single-phase rotating shaft 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.
  • 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.
  • 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 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.
  • FIG. 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;
  • FIG. 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 .
  • 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.
  • installed 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.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • 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.
  • 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.
  • corresponding through shaft holes 310 are provided on the two main plates.
  • a positioning bushing 307 is also fixed on the upper splint 301 .
  • a rib plate is arranged outside the positioning shaft sleeve 307 .
  • 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.
  • 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 .
  • 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.
  • 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 .
  • 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.
  • 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
  • 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.
  • the driving shaft 2 has an overhang extending upward through the upper plate 301.
  • 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.
  • 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.
  • crank arm member 3 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.
  • 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.
  • 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.
  • 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.
  • a corresponding avoidance structure 312 is provided on the assembly frame 300 to avoid the connecting rod assembly 4 , to achieve normal installation.
  • 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 .
  • 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.
  • 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.
  • the front cover body 201 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.
  • 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 operating mechanism is a disc spring hydraulic operating mechanism.
  • the operating mechanism can also be an electromagnetic operating mechanism, which can also adopt a horizontal arrangement.
  • it can also be designed in a vertical arrangement according to actual needs.
  • the active rotating shaft can also be selected as a mid-phase rotating shaft according to actual needs.
  • 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.
  • the assembling frame can also be all rod frame structure, instead of using steel plate, it is mainly made of welded section steel.
  • Embodiment 1 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.
  • Embodiment 1 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.
  • Embodiment 1 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.
  • 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.
  • 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.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un système de transmission à liaison mécanique pour un disjoncteur triphasé, ainsi que ce disjoncteur triphasé. Le système de transmission à liaison mécanique selon l'invention comprend : une crémaillère d'assemblage ; et un mécanisme de transmission synchrone triphasé, comprenant trois arbres rotatifs monophasés, chaque arbre rotatif monophasé étant pourvu respectivement d'un bras de manivelle de sortie et d'un bras de manivelle à liaison synchrone, et deux bras de manivelle à liaison synchrone de deux arbres rotatifs monophasés adjacents étant en liaison de transmission au moyen d'une bielle interphasée. Le système de transmission à liaison mécanique selon l'invention comprend également un mécanisme d'actionnement, le mécanisme d'actionnement étant pourvu d'un arbre de sortie de puissance, l'arbre de sortie de puissance entraînant la rotation d'un arbre rotatif d'entraînement au moyen d'un mécanisme de transmission intermédiaire, et l'arbre rotatif d'entraînement entraînant la rotation des deux autres arbres rotatifs monophasés au moyen de la bielle interphasée, ce qui permet d'obtenir une action synchrone triphasée. L'utilisation de la crémaillère d'assemblage permet de monter à l'avance le mécanisme d'actionnement et le mécanisme de transmission synchrone triphasé sur ladite crémaillère, de sorte à former un module pré-assemblé, puis d'assembler fixe l'ensemble du module pré-assemblé, avec une plaque de base de montage à l'extrémité arrière du disjoncteur triphasé. La présente invention permet de simplifier efficacement le processus d'assemblage, d'accroître l'efficacité d'assemblage et de faciliter la conception modulaire du disjoncteur triphasé.
PCT/CN2021/113047 2020-12-11 2021-08-17 Système de transmission à liaison mécanique pour disjoncteur triphasé, et disjoncteur triphasé WO2022121360A1 (fr)

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CN202011452429.6A CN114628188B (zh) 2020-12-11 2020-12-11 三相断路器用机械联动传动系统和三相断路器

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