WO2021129369A1 - 断路器及其电阻断口传动结构 - Google Patents

断路器及其电阻断口传动结构 Download PDF

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Publication number
WO2021129369A1
WO2021129369A1 PCT/CN2020/134364 CN2020134364W WO2021129369A1 WO 2021129369 A1 WO2021129369 A1 WO 2021129369A1 CN 2020134364 W CN2020134364 W CN 2020134364W WO 2021129369 A1 WO2021129369 A1 WO 2021129369A1
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WO
WIPO (PCT)
Prior art keywords
transmission
contact
resistance
arm
rod
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PCT/CN2020/134364
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English (en)
French (fr)
Inventor
骆常璐
高振奎
孙明道
宋跃龙
史峰涛
李森
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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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 WO2021129369A1 publication Critical patent/WO2021129369A1/zh

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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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with 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
    • H01H33/02—Details
    • H01H33/42—Driving mechanisms

Definitions

  • This application relates to the field of electrical equipment, in particular to a circuit breaker and its resistance fracture transmission structure.
  • the high-voltage circuit breaker is an important electrical equipment in the power system. During the closing operation of the high-voltage circuit breaker, overvoltage will be generated on the transmission line. The hazard of the overvoltage is: it is easy to damage the electrical equipment on the transmission line and affect the power system. Stable operation.
  • the main circuit is usually combined with the brake resistance, and a resistance fracture in series with the closing resistance is set to control the connection and disconnection of the closing resistance and the power system. Before the main break is closed, the resistance break is closed first, and the over-voltage is consumed on the closing resistance to ensure that the voltage at both ends of the main break is normal when the main break is closed.
  • the circuit breaker When the circuit breaker is opened, the resistance fracture must be opened before the main fracture, that is, the resistance fracture should be opened first and closed first.
  • the circuit breaker In order to ensure the opening and closing sequence of the resistance fracture and the main fracture, the circuit breaker usually adopts the method in which the movable contact of the main fracture and the movable contact of the resistance fracture are driven by the same drive mechanism.
  • the circuit breaker includes a fixed frame, a drive mechanism, a transmission structure, and a fracture unit.
  • the fracture unit includes a main fracture and a resistance fracture.
  • the resistive static contact in the resistance fracture is fixed on the fixed frame by a spring.
  • the direction of the spring force and the resistance are The moving direction of the resistance moving contact in the fracture is the same.
  • the transmission structure includes an active contact rod transmission rod and a resistance moving contact rod transmission rod arranged in parallel. The active contact transmission rod and the resistance moving contact transmission rod adopt a direct motion to realize the opening and closing operations of the main fracture and the resistance fracture respectively.
  • the moving speed of the resistance movable contact during opening needs to be greater than the reset speed of the resistance static contact under the action of the spring force.
  • the opening and closing of the resistance fracture is realized by direct action, which requires the output end of the drive mechanism to have a higher movement speed, and the drive mechanism with a higher movement speed at the output end usually has more parts and components.
  • the structure is heavy and expensive.
  • the purpose of this application is to provide a resistance fracture transmission structure of a circuit breaker to solve the problems of a large number of driving mechanism components required for a circuit breaker in the prior art, a heavy structure and high cost.
  • Another purpose of this application is to provide A circuit breaker is used to solve the problems that the circuit breaker in the prior art requires a large number of driving mechanism parts, a heavy structure and a high cost.
  • the technical solution of the resistance fracture transmission structure of the circuit breaker in this application is: the resistance fracture transmission structure of the circuit breaker includes a transmission arm, a driving lever and an intermediate transmission rod;
  • the transmission crank arm includes a first transmission arm and a second transmission arm arranged in an L shape, and a fixed hinge point is provided at the connection between the first transmission arm and the second transmission arm;
  • the first transmission arm is provided with an input hinge point, which is used to connect with the driving mechanism to realize the swing of the transmission arm;
  • the second transmission arm is provided with a transmission connection for the main contact of the circuit breaker
  • the first output articulation point is also provided with a second output articulation point for connection with the resistance contact transmission of the circuit breaker;
  • the driving lever is located on the side of the drive arm close to the resistance fracture, and has a hinged end and a contact driving end; a resistance contact connecting rod is hinged between the contact driving end and the resistance contact assembly set by the guide, the driving lever, and the resistance
  • the contact connecting rod and the resistance contact assembly form a crank slider mechanism, which is used to drive the resistance contact assembly to expand and contract when the driving lever swings;
  • the intermediate transmission rod one end is hinged on the second output hinge point, and the other end is hinged between the hinged end of the driving lever and the contact driving end, and is used to drive the driving lever to swing in the form of a laborious lever when the driving arm swings .
  • the driving lever and the intermediate transmission rod and the resistance contact connecting rod form a laborious lever, that is, the hinged end forms a fulcrum, and the hinged end and the intermediate transmission rod are hinged on the driving lever.
  • the part of the driving lever in between forms the power arm, the force output from the intermediate transmission rod to the driving lever forms the power, the driving lever between the hinge end and the contact driving end forms the resistance arm, and the resistance contact connecting rod impedes the driving lever.
  • the force of the lever rotation forms resistance.
  • the moving speed of the resistance contact connecting rod can be increased, and the speed requirements for the resistance moving contact of the resistance fracture can be satisfied.
  • the mechanism meets the speed requirements of the resistance moving contact of the resistance fracture.
  • the circuit breaker requires fewer parts of the driving mechanism, simple structure and low cost.
  • the hinge end of the driving lever is located on the side of the main contact axis away from the resistance contact.
  • the advantage is that it is easy to design a suitable leverage ratio.
  • the resistance fracture transmission structure of the circuit breaker further includes a first transmission rod hinged at the first output hinge point, and the first transmission rod is hinged with the active contact rod of the main contact to drive the active when the transmission driving lever rotates.
  • the contact rod moves, the first transmission rod and the active contact rod are located in the main contact transmission plane, the driving lever is located in the resistance contact transmission plane, the main contact transmission plane and the resistance contact transmission plane are coplanar, and the driving lever has An avoidance channel used to avoid the active contact rod and/or the first transmission rod.
  • the advantage is that the force is balanced, avoiding jamming, and ensuring reliable action.
  • the resistance fracture is located directly below the main fracture in the axial direction of the transmission arm.
  • the intermediate transmission rod is coplanar with the transmission plane of the main contact and the transmission plane of the resistance contact.
  • the advantage lies in avoiding the eccentric force of the driving lever from affecting the working reliability of the transmission structure.
  • the driving lever has an opening position and a closing position respectively corresponding to the opening state and the closing state of the resistance contact, and the opening position and the closing position are symmetrical about a plane perpendicular to the direction of the resistance contact.
  • the advantage is that the driving lever has a larger driving resistance contact opening and closing component force, which reduces the power demand of the driving mechanism.
  • the circuit breaker includes a left-right symmetrical first fracture unit and a second fracture unit, and each fracture unit is provided with a resistance fracture transmission structure of the circuit breaker corresponding to the circuit breaker.
  • the resistance fracture transmission structure including the transmission arm, the driving lever and the intermediate transmission rod;
  • the transmission crank arm includes a first transmission arm and a second transmission arm arranged in an L shape, and a fixed hinge point is provided at the connection between the first transmission arm and the second transmission arm;
  • the first transmission arm is provided with an input hinge point, which is used to connect with the driving mechanism to realize the swing of the transmission arm;
  • the second transmission arm is provided with a transmission connection for the main contact of the circuit breaker
  • the first output articulation point is also provided with a second output articulation point for connection with the resistance contact transmission of the circuit breaker;
  • the driving lever is located on the side of the driving arm close to the resistance fracture, and has a hinged end and a contact driving end;
  • the resistance contact connecting rod is hinged between the contact driving end and the resistance contact assembly provided by the guide, the driving lever, and the resistance
  • the contact connecting rod and the resistance contact assembly form a crank slider mechanism, which is used to drive the resistance contact assembly to expand and contract when the driving lever swings;
  • the intermediate transmission rod one end is hinged on the second output hinge point, and the other end is hinged between the hinged end of the driving lever and the contact driving end, and is used to drive the driving lever to swing in the form of a laborious lever when the driving arm swings .
  • the driving lever and the intermediate transmission rod and the resistance contact connecting rod form a laborious lever, that is, the hinged end forms a fulcrum, and the hinged end and the intermediate transmission rod are partially driven between the hinge point on the driving lever
  • the lever forms a power arm
  • the force output from the intermediate transmission rod to the driving lever forms the power
  • the driving lever between the hinged end and the contact driving end forms a resistance arm
  • the resistance contact connecting rod exerts on the driving lever to impede the rotation of the driving lever.
  • the moving speed of the resistance contact connecting rod can be increased to meet the speed requirements of the resistance moving contact of the resistance fracture, compared to the setting of a drive mechanism with a higher movement speed to meet the resistance fracture
  • the circuit breaker requires fewer parts of the driving mechanism, simple structure and low cost.
  • the hinge end of the driving lever is located on the side of the main contact axis away from the resistance contact.
  • the advantage is that it is easy to design a suitable leverage ratio.
  • the resistance fracture transmission structure of the circuit breaker further includes a first transmission rod hinged at the first output hinge point, and the first transmission rod is hinged with the active contact rod of the main contact to drive the active when the transmission driving lever rotates.
  • the contact rod moves, the first transmission rod and the active contact rod are located in the main contact transmission plane, the driving lever is located in the resistance contact transmission plane, the main contact transmission plane and the resistance contact transmission plane are coplanar, and the driving lever has An avoidance channel used to avoid the active contact rod and/or the first transmission rod.
  • the advantage is that the force is balanced, avoiding jamming, and ensuring reliable action.
  • the resistance fracture is located directly below the main fracture in the axial direction of the transmission arm.
  • the intermediate transmission rod is coplanar with the transmission plane of the main contact and the transmission plane of the resistance contact.
  • the advantage lies in avoiding the eccentric force of the driving lever from affecting the working reliability of the transmission structure.
  • the driving lever has an opening position and a closing position respectively corresponding to the opening state and the closing state of the resistance contact, and the opening position and the closing position are symmetrical about a plane perpendicular to the direction of the resistance contact.
  • the advantage is that the driving lever has a larger driving resistance contact opening and closing component force, which reduces the power demand of the driving mechanism.
  • the resistance fracture transmission structure corresponding to the first fracture unit includes a left transmission arm
  • the resistance fracture transmission structure corresponding to the second fracture unit includes a right transmission arm.
  • the left transmission arm is parallel to the swing axis of the right transmission arm, and the left The drive crank arm and the right drive crank arm are staggered along the swing axis of the crank arm;
  • the first transmission arm and the second transmission arm of the left transmission arm are staggered along the swing axis of the transmission arm, and the first transmission arm and the second transmission arm of the right transmission arm are staggered along the swing axis of the transmission arm, so that the left The driving arm and the first driving arm of the right driving arm are coplanar.
  • the advantage lies in reducing the space required for the fracture and facilitating the arrangement of other structures.
  • Fig. 1 is a schematic diagram of the structure of a specific embodiment of the circuit breaker of this application;
  • FIG. 2 is a schematic structural diagram of a specific embodiment of the resistance fracture transmission structure in FIG. 1 (when the resistance fracture is in an open state);
  • FIG. 3 is a schematic structural view of a part of the structure of a specific embodiment of the resistance fracture transmission structure in FIG. 1 (when the resistance fracture is in the closed state);
  • Insulated connecting rod 2. Right transmission arm, 21, fixed hinge point, 22, second output hinge point, 23, first output hinge point, 24, input hinge point, 3. first transmission rod , 4. Active contact rod, 5. Intermediate transmission rod, 6. Drive lever, 61, Drive lever hinge point, 62, Drive rod hinge point, 63, Drive lever power output point, 7, Resistance contact connecting rod, 8 , Resistance moving contact rod, 9, transmission swing arm, 10, left transmission arm, M, main fracture, N, resistance fracture.
  • first and “second” and other relational terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between.
  • the terms “include”, “include” or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of, or also include elements inherent to this process, method, article or equipment. If there are no more restrictions, the element defined by the sentence “including a" does not exclude the existence of other same elements in the process, method, article, or equipment that includes the element.
  • the circuit breaker includes a fixed frame (not shown in the figure), a drive mechanism, a transmission structure, and a fracture unit.
  • the fracture unit includes a left-right symmetrical section.
  • a fracture unit and a second fracture unit, and each fracture unit is provided with a corresponding resistance fracture transmission structure.
  • the second fracture unit and its corresponding fracture transmission structure on the right side of FIG. 1 are taken as an example for description.
  • the fracture transmission structure includes a right transmission crank arm 2.
  • the right transmission crank arm 2 includes a first transmission arm and a second transmission arm arranged in an L shape. The connection between the first transmission arm and the second transmission arm is used for fixing on the fixed machine.
  • An input hinge point 24 for connecting with the insulating connecting rod 1 is provided at an end of the first transmission arm away from the fixed hinge point 21 on the fixed hinge point 21 on the frame.
  • the second transmission arm has a first output hinge point 23 that is connected to the active contact rod 4 of the main fracture M.
  • the first output hinge point 23 is relatively connected to a first transmission rod 3, and one end of the first transmission rod 3 It is connected to the first output hinge point 23 and the other end is connected to the active contact rod 4 to drive the active contact rod 4 to move along the extension direction of the active contact rod 4.
  • a second output hinge point 22 is provided on the second transmission arm between the first output hinge point 23 and the fixed hinge point 21.
  • the resistance fracture transmission structure of the circuit breaker also includes a driving lever 6, which is located on the side of the right transmission arm 2 close to the resistance fracture N, and the upper end of the driving lever 6 has a driving lever hinge point for hingedly connecting to the fixed frame 61.
  • the upper end of the driving lever 6 constitutes a hinged end.
  • the right transmission arm 2 is fitted with an intermediate transmission rod 5 at the second output hinge point 22.
  • the driving lever 6 has a transmission rod hinge point 62 for the intermediate transmission rod 5 to be articulated.
  • the intermediate transmission rod 5 is used for turning the right transmission.
  • the lower end of the driving lever 6 has a driving lever power output point 63.
  • the driving lever power output point 63 is connected to a resistance contact connecting rod 7, and one end of the resistance contact connecting rod 7 is connected to the driving lever power output point 63.
  • One end is connected to the resistive movable contact rod 8 of the resistance fracture N to drive the resistive movable contact rod 8 to move along the extending direction of the resistive movable contact rod 8, and the lower end of the driving lever 6 forms the contact driving end.
  • the first output hinge point 23 and the second output hinge point 22 rotate around the fixed contact point 21 together, and the second output hinge point 22 is smaller than the first output hinge point 23. Closer to the fixed contact point 21, the linear speed of the second output hinge point 22 is less than the linear speed of the first output hinge point 23. If the intermediate transmission rod 5 is directly hinged with the resistance contact connecting rod 7, the resistance moving contact rod 8 The speed will be slower, and it is difficult to realize the first opening sequence of the resistance fracture N relative to the corresponding main fracture M in practical engineering applications.
  • the driving lever 6 and the intermediate transmission rod 5 and the resistance contact connecting rod 7 form a laborious lever, that is, the driving lever hinge point 61 forms a fulcrum, and the driving lever hinge point 61 and the transmission rod hinge point 62 are between
  • the driving lever of the driving lever forms a power arm
  • the force output from the intermediate transmission rod 5 to the driving lever 6 forms the power
  • the driving lever between the driving lever power output point 63 and the driving lever hinge point 61 forms a resistance arm
  • the resistance contact connecting rod 7 drives The force exerted by the lever 6 hindering the rotation of the driving lever 6 forms resistance, and the moving speed of the resistive movable contact rod 8 is increased through the above-mentioned laborious lever.
  • the working principle of the resistance fracture transmission structure of the circuit breaker as shown in Figure 2 and Figure 3, the direction of movement of the active contact rod 4 in Figure 2 when closing is to the right, and the direction of movement when opening is to the left.
  • the direction perpendicular to the resistance moving contact rod 8 pointing to the moving contact rod 4 is upward, and the direction perpendicular to the resistance moving contact rod 8 facing away from the moving contact rod 4 is downward.
  • the insulating link 1 moves upward under the drive of the power unit, pushing the right transmission arm 2 to rotate clockwise around the fixed contact 21, and the first output hinge point 23 on the right transmission arm 2 drives the active contact through the first transmission rod 3.
  • the head lever 4 moves to the right, and the right transmission arm 2 rotates clockwise around the fixed contact 21.
  • the transmission swing arm 9 is an L-shaped swing arm, and its inflection point has a hinge hole for hingedly connecting to the fixed frame. One end of the transmission swing arm 9 is the power input end, and the power input end is used for hinged connection with the output end of the drive mechanism.
  • the drive swing arm 9 When the driving mechanism moves, the drive swing arm 9 is driven to rotate around the hinge hole.
  • the other end of the drive swing arm 9 is hinged with two insulating links 1 at the same time to drive the insulated link 9 to move when the drive swing arm 9 rotates.
  • the transmission structure converts the movement of the insulating link 1 into active The horizontal movement of the contact rod 4 and the resistance movable contact rod 8.
  • the resistance fracture transmission structure corresponding to the first fracture unit includes a left transmission crank arm 10, the left transmission crank arm 10 is parallel to the swing axis of the right transmission crank arm 2, and the left transmission crank arm 10 and the right transmission crank arm 2 Stagger along the swing axis of the crank arm.
  • the first transmission arm and the second transmission arm of the right transmission arm 2 are staggered along the swing axis of the transmission arm, and the first transmission arm and the second transmission arm of the left transmission arm 10 are staggered along the swing axis of the transmission arm,
  • the first transmission arm of the left transmission arm 10 and the right transmission arm 2 are coplanar.
  • the first transmission arm of the left transmission arm and the right transmission arm may not be coplanar.
  • the first transmission arm and the second transmission arm can be staggered along the swing axis of the transmission arm. Open layout.
  • the first transmission rod 3 and the active contact rod 4 are located in the main contact transmission plane
  • the driving lever 6 is located in the resistance contact transmission plane
  • the main contact transmission plane and the resistance contact transmission plane are coplanar
  • the driving lever The hinged end of 6 is located on the side of the main contact axis away from the resistance contact
  • the driving lever 6 is provided with an avoiding channel for avoiding the active contact rod 4 and the first transmission rod 3 to avoid the driving lever to the main contact Interference occurs during opening and closing.
  • other methods can be used to prevent the driving lever from interfering with the opening and closing of the main contact.
  • the hinge point of the driving lever is arranged below the active contact rod, or the main contact transmission plane is connected to the main contact.
  • the transmission plane of the resistance contact is staggered, and there is no need to set an escape channel on the driving lever at this time.
  • the driving lever 6 corresponds to the opening position and the closing position, and the driving lever 6 in the opening position and the closing position are respectively located in the left and right directions.
  • the left and right sides of the lever hinge point 61 are symmetrical about the plane perpendicular to the direction of the resistance contact guide.
  • other forms may be adopted.
  • the power output point of the driving lever is in the horizontal direction.
  • the upper parts are located on the same side of the hinge point of the driving lever, or the driving lever is located on the left and right sides of the hinge point of the driving lever when it is in the opening position and when it is in the closing position, but between the planes perpendicular to the direction of the resistance contact
  • the formed angle has an angular difference.
  • the resistance fracture transmission structure of the circuit breaker of the present application is the same as the resistance fracture transmission structure in the specific embodiment of the above-mentioned circuit breaker, and will not be repeated.
  • the fracture transmission structure includes a transmission crank arm, a driving lever and an intermediate transmission rod;
  • the transmission crank arm includes a first transmission arm and a second transmission arm arranged in an L shape, and the first transmission arm and the second transmission arm
  • the joint of the transmission arm is provided with a fixed hinge point;
  • the first transmission arm has an input hinge point on it, and the input hinge point is used to connect with the driving mechanism to realize the swing of the transmission arm;
  • the second transmission arm is provided with a At the first output articulation point connected to the main contact of the circuit breaker in transmission, a second output articulation point for connection to the resistance contact of the circuit breaker is also provided;
  • the drive lever is located on the one of the drive arm that is close to the resistance fracture.
  • the side has a hinged end and a contact drive end; a resistance contact link is hinged between the contact drive end and the resistance contact assembly provided by the guide, and the drive lever, the resistance contact link and the resistance contact assembly form a crank slider
  • the crank slider mechanism is used to drive the resistance contact assembly to guide and expand when the drive lever swings; one end of the intermediate transmission rod is hinged on the second output hinge point, and the other end is hinged on the hinge end of the drive lever and the contact drive Between the ends, it is used to drive the driving lever to swing in the form of a laborious lever when the driving arm swings.
  • the drive lever and the intermediate transmission rod and the resistance contact connecting rod form a laborious lever, that is, the hinged end forms a fulcrum, the part of the drive lever between the hinged end and the hinge point of the intermediate transmission rod on the drive lever forms a power arm, and the intermediate transmission rod
  • the force output to the drive lever forms power
  • the drive lever between the hinged end and the contact drive end forms a resistance arm
  • the resistance contact link exerts on the drive lever to impede the rotation of the drive lever to form resistance, through the form of the above-mentioned laborious lever It can increase the moving speed of the resistance contact connecting rod, and meet the speed requirements of the resistance moving contact of the resistance fracture.
  • the circuit breaker requires fewer parts, simple structure and low cost.

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Abstract

一种断路器及其电阻断口传动结构。断路器的电阻断口传动结构包括传动拐臂(2,10)、驱动杠杆(6)和中间传动杆(5)；传动拐臂(2,10)上设有固定铰接点(21)、输入铰接点(24)、第一输出铰接点(23)和第二输出铰接点(22)；驱动杠杆(6)具有铰接端和触头驱动端；触头驱动端与导向设置的电阻触头组件之间铰接有电阻触头连杆(7)，中间传动杆(5)的一端铰接在所述第二输出铰接点(22)上，另一端铰接在驱动杠杆(6)的铰接端和触头驱动端之间，用于在传动拐臂(2,10)摆动时带动驱动杠杆(6)以费力杠杆的形式摆动。通过上述费力杠杆的形式能够增大电阻触头连杆(7)的移动速度，满足对电阻断口的电阻动触头的速度要求，使断路器所需驱动机构的零部件较少、结构简单且造价低。

Description

断路器及其电阻断口传动结构
相关申请的交叉引用
本公开基于申请号为201911348292.7、申请日为2019年12月24日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及电气设备领域，尤其涉及一种断路器及其电阻断口传动结构。
背景技术
高压断路器是电力系统中重要的电气设备，在高压断路器合闸操作过程中，会在输电线路上产生过电压，过电压的危害在于：容易损坏输电线路上的电气设备，影响电力系统的稳定运行。为了限制和消除输电线路上的过电压，通常在主回路中并联合闸电阻，设置与合闸电阻串联的电阻断口控制合闸电阻与电力系统的接入与断开。在主断口合闸前，电阻断口先合闸，过电压消耗在合闸电阻上，保证主断口合闸时，主断口两端的电压正常。在断路器分闸时，也需要电阻断口先于主断口分闸，即电阻断口先分先合。为了保证电阻断口与主断口的分合闸时序，断路器通常采用主断口的动触头与电阻断口的动触头通过同一套驱动机构进行驱动的方式。
高压断路器如申请公布号为CN106024505A，申请公布日为2016年10月12日公布的中国发明专利申请中公开的断路器。断路器包括固定机架、驱动机构、传动结构和断口单元，断口单元包括主断口和电阻断口，电阻断口中的电阻静触头通过弹簧固定在固定机架上，弹簧的弹力方向与电阻 断口中电阻动触头的运动方向相同，电阻断口合闸时，电阻动触头带动电阻静触头对弹簧进行压缩，电阻断口分闸时，弹簧解除压缩并带动电阻静触头复位。传动结构包括平行布置的主动触杆传动杆和电阻动触杆传动杆，主动触头传动杆和电阻动触头传动杆采用直动的形式分别实现主断口与电阻断口分合闸操作。
为了保证电阻断口先于主断口分闸，分闸时电阻动触头的移动速度需要大于电阻静触头在弹簧的弹力作用下的复位速度。上述断路器中通过直动的形式实现电阻断口的分合闸，这就要求驱动机构的输出端具有较高的运动速度，而输出端具有较高的运动速度的驱动机构通常零部件较多、结构笨重并且造价较高。
发明内容
本申请的目的在于提供一种断路器的电阻断口传动结构，用以解决现有技术中的断路器所需驱动机构零部件较多、结构笨重并且造价较高问题，本申请另外的目的在于提供一种断路器，用以解决现有技术中的断路器所需驱动机构零部件较多、结构笨重并且造价较高问题。
为实现上述目的，本申请中断路器的电阻断口传动结构的技术方案是：断路器的电阻断口传动结构，包括传动拐臂、驱动杠杆和中间传动杆；
传动拐臂，包括呈L形布置的第一传动臂和第二传动臂，第一传动臂和第二传动臂的连接处设有固定铰接点；
第一传动臂，其上设有输入铰接点，输入铰接点用于与驱动机构连接以实现传动拐臂的摆动；第二传动臂，其上设有用于与断路器的主触头传动连接的第一输出铰接点，还设有用于与断路器的电阻触头传动连接的第二输出铰接点；
驱动杠杆，位于传动拐臂的靠近电阻断口的一侧，具有铰接端和触头驱动端；触头驱动端与导向设置的电阻触头组件之间铰接有电阻触头连杆， 驱动杠杆、电阻触头连杆和电阻触头组件形成曲柄滑块机构，曲柄滑块机构用于在驱动杠杆摆动时带动电阻触头组件导向伸缩；
中间传动杆，一端铰接在所述第二输出铰接点上，另一端铰接在驱动杠杆的铰接端和触头驱动端之间，用于在传动拐臂摆动时带动驱动杠杆以费力杠杆的形式摆动。
本申请中断路器的电阻断口传动结构的有益效果是：驱动杠杆与中间传动杆以及电阻触头连杆形成费力杠杆，即铰接端形成支点，铰接端与中间传动杆在驱动杠杆上的铰接点之间的部分驱动杠杆形成动力臂，中间传动杆向驱动杠杆输出的力形成动力，铰接端与触头驱动端之间的驱动杠杆形成阻力臂，电阻触头连杆向驱动杠杆施加的阻碍驱动杠杆转动的力形成阻力，通过上述费力杠杆的形式能够增大电阻触头连杆的移动速度，满足对电阻断口的电阻动触头的速度要求，相对于通过设置具有较高的运动速度的驱动机构以满足电阻断口的电阻动触头的速度要求的形式，断路器所需驱动机构的零部件较少、结构简单且造价低。
进一步的，所述驱动杠杆的铰接端位于主触头轴线的背向电阻触头的一侧。
其有益之处在于，便于设计合适的杠杆比。
进一步的，断路器的电阻断口传动结构还包括铰接在所述第一输出铰接点处的第一传动杆，第一传动杆与主触头的主动触杆铰接以在传动驱动杠杆转动时驱动主动触杆运动，第一传动杆与主动触杆位于主触头传动平面内，驱动杠杆位于电阻触头传动平面内，所述主触头传动平面与电阻触头传动平面共面，驱动杠杆上具有用于避让主动触头杆和/或第一传动杆的避让通道。
其有益之处在于，受力均衡，避免卡滞，保证可靠动作。
进一步的，所述电阻断口在传动拐臂的轴向上位于主断口的正下方。
其有益之处在于，优化空间的利用。
进一步的，所述中间传动杆与所述主触头传动平面以及电阻触头传动平面共面。
其有益之处在于，避免驱动杠杆受到偏心力导致影响传动结构的工作可靠性。
进一步的，所述驱动杠杆具有与电阻触头的分闸状态与合闸状态分别对应的分闸位和合闸位，分闸位和合闸位关于与电阻触头导向方向垂直的平面对称。
其有益之处在于，使驱动杠杆具有较大的驱动电阻触头分合闸的分力，减小对驱动机构的功率的需求。
为实现上述目的，本申请中断路器的技术方案是：断路器，包括左右对称的第一断口单元和第二断口单元，每断口单元都对应设置有断路器的电阻断口传动结构，断路器的电阻断口传动结构，包括传动拐臂、驱动杠杆和中间传动杆；
传动拐臂，包括呈L形布置的第一传动臂和第二传动臂，第一传动臂和第二传动臂的连接处设有固定铰接点；
第一传动臂，其上设有输入铰接点，输入铰接点用于与驱动机构连接以实现传动拐臂的摆动；第二传动臂，其上设有用于与断路器的主触头传动连接的第一输出铰接点，还设有用于与断路器的电阻触头传动连接的第二输出铰接点；
驱动杠杆，位于传动拐臂的靠近电阻断口的一侧，具有铰接端和触头驱动端；触头驱动端与导向设置的电阻触头组件之间铰接有电阻触头连杆，驱动杠杆、电阻触头连杆和电阻触头组件形成曲柄滑块机构，曲柄滑块机构用于在驱动杠杆摆动时带动电阻触头组件导向伸缩；
中间传动杆，一端铰接在所述第二输出铰接点上，另一端铰接在驱动 杠杆的铰接端和触头驱动端之间，用于在传动拐臂摆动时带动驱动杠杆以费力杠杆的形式摆动。
本申请中断路器的有益效果是：驱动杠杆与中间传动杆以及电阻触头连杆形成费力杠杆，即铰接端形成支点，铰接端与中间传动杆在驱动杠杆上的铰接点之间的部分驱动杠杆形成动力臂，中间传动杆向驱动杠杆输出的力形成动力，铰接端与触头驱动端之间的驱动杠杆形成阻力臂，电阻触头连杆向驱动杠杆施加的阻碍驱动杠杆转动的力形成阻力，通过上述费力杠杆的形式能够增大电阻触头连杆的移动速度，满足对电阻断口的电阻动触头的速度要求，相对于通过设置具有较高的运动速度的驱动机构以满足电阻断口的电阻动触头的速度要求的形式，断路器所需驱动机构的零部件较少、结构简单且造价低。
进一步的，所述驱动杠杆的铰接端位于主触头轴线的背向电阻触头的一侧。
其有益之处在于，便于设计合适的杠杆比。
进一步的，断路器的电阻断口传动结构还包括铰接在所述第一输出铰接点处的第一传动杆，第一传动杆与主触头的主动触杆铰接以在传动驱动杠杆转动时驱动主动触杆运动，第一传动杆与主动触杆位于主触头传动平面内，驱动杠杆位于电阻触头传动平面内，所述主触头传动平面与电阻触头传动平面共面，驱动杠杆上具有用于避让主动触头杆和/或第一传动杆的避让通道。
其有益之处在于，受力均衡，避免卡滞，保证可靠动作。
进一步的，所述电阻断口在传动拐臂的轴向上位于主断口的正下方。
其有益之处在于，优化空间的利用。
进一步的，所述中间传动杆与所述主触头传动平面以及电阻触头传动平面共面。
其有益之处在于，避免驱动杠杆受到偏心力导致影响传动结构的工作可靠性。
进一步的，所述驱动杠杆具有与电阻触头的分闸状态与合闸状态分别对应的分闸位和合闸位，分闸位和合闸位关于与电阻触头导向方向垂直的平面对称。
其有益之处在于，使驱动杠杆具有较大的驱动电阻触头分合闸的分力，减小对驱动机构的功率的需求。
进一步的，第一断口单元对应的电阻断口传动结构包括左传动拐臂，第二断口单元对应的电阻断口传动结构包括右传动拐臂，左传动拐臂与右传动拐臂的摆动轴线平行，左传动拐臂与右传动拐臂沿拐臂的摆动轴线错开；
左传动拐臂的第一传动臂与第二传动臂沿传动拐臂的摆动轴线错开布置，右传动拐臂的第一传动臂与第二传动臂沿传动拐臂的摆动轴线错开布置，使左传动拐臂及右传动拐臂的第一传动臂共面。
其有益之处在于，减小断口所需的空间并便于其他结构的布置。
附图说明
图1为本申请的断路器一种具体实施例的结构示意；
图2为图1中的电阻断口传动结构的一种具体实施例的结构示意图(电阻断口处于分闸状态时)；
图3为图1中的电阻断口传动结构的一种具体实施例的部分结构的结构示意图(电阻断口处于合闸状态时)；
图中：1、绝缘连杆，2、右传动拐臂，21、固定铰接点，22、第二输出铰接点，23、第一输出铰接点，24、输入铰接点，3、第一传动杆，4、主动触头杆，5、中间传动杆，6、驱动杠杆，61、驱动杠杆铰接点，62、传动杆铰接点，63、驱动杠杆动力输出点，7、电阻触头连杆，8、电阻动 触头杆，9、传动摆臂，10、左传动拐臂，M、主断口，N、电阻断口。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请，即所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本申请实施例的组件可以以各种不同的配置来布置和设计。
因此，以下对在附图中提供的本申请的实施例的详细描述并非旨在限制要求保护的本申请的范围，而是仅仅表示本申请的选定实施例。基于本申请的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，术语“第一”和“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以下结合实施例对本申请的特征和性能作进一步的详细描述。
本申请的断路器一种具体实施例，如图1和图2所示，断路器包括固定机架(图中未示出)、驱动机构、传动结构和断口单元，断口单元包括左右对称的第一断口单元和第二断口单元，各断口单元均设置对应的电阻断口传动结构，下面以位于图1右侧的第二断口单元及其对应的断口传动结 构为例进行说明。断口传动结构包括右传动拐臂2，右传动拐臂2包括呈L形布置的第一传动臂和第二传动臂，第一传动臂和第二传动臂的连接处具有用于固定在固定机架上的固定较接点21，第一传动臂远离固定铰接点21的一端设有用于与绝缘连杆1较接的输入铰接点24。第二传动臂上具有与主断口M的主动触头杆4传动连接的第一输出铰接点23，该第一输出铰接点23上较接有第一传动杆3，第一传动杆3的一端较接在第一输出铰接点23上、另一端与主动触头杆4较接以驱动主动触头杆4沿该主动触头杆4的延伸方向导向移动。第二传动臂上于第一输出铰接点23和固定绞接点21之间设有第二输出铰接点22。
断路器的电阻断口传动结构还包括驱动杠杆6，驱动杠杆6位于右传动拐臂2的靠近电阻断口N的一侧，驱动杠杆6的上端具有用于铰接到固定机架上的驱动杠杆铰接点61，驱动杠杆6的上端构成铰接端。右传动拐臂2上于第二输出铰接点22处较接装配有中间传动杆5，驱动杠杆6具有供中间传动杆5铰接的传动杆铰接点62，中间传动杆5用于在右传动拐臂2带着中间传动杆5绕固定铰接点21转动时向驱动杠杆6施加迫使其以与右传动拐臂2转动方向相反的方向绕驱动杠杆铰接点61转动的作用力。驱动杠杆6的下端具有驱动杠杆动力输出点63，驱动杠杆动力输出点63上较接有电阻触头连杆7，电阻触头连杆7的一端较接在驱动杠杆动力输出点63上、另一端与电阻断口N的电阻动触头杆8较接以驱动电阻动触头杆8沿该电阻动触头杆8延伸方向导向移动，驱动杠杆6的下端形成触头驱动端。
在右传动拐臂2绕固定较接点21转动时，第一输出铰接点23和第二输出铰接点22一同绕固定较接点21转动，且第二输出铰接点22由于比第一输出铰接点23更靠近固定较接点21，第二输出铰接点22的线速度要小于第一输出铰接点23的线速度，如果中间传动杆5与电阻触头连杆7直接铰接的话，电阻动触头杆8的速度会较慢，在实际工程应用中就很难实现 电阻断口N相对于对应的主断口M先分闸的时序。因此，通过设置驱动杠杆6，使驱动杠杆6与中间传动杆5以及电阻触头连杆7形成费力杠杆，即驱动杠杆铰接点61形成支点，驱动杠杆铰接点61与传动杆铰接点62之间的驱动杠杆形成动力臂，中间传动杆5向驱动杠杆6输出的力形成动力，驱动杠杆动力输出点63与驱动杠杆铰接点61之间的驱动杠杆形成阻力臂，电阻触头连杆7向驱动杠杆6施加的阻碍驱动杠杆6转动的力形成阻力，通过上述费力杠杆的形式增大电阻动触头杆8的移动速度。
断路器的电阻断口传动结构的工作原理：如图2和图3所示，以图2中主动触头杆4合闸时的运动方向为向右，分闸时的运动方向为向左，以垂直于电阻动触头杆8指向动触头杆4的方向为向上，以垂直于电阻动触头杆8背向动触头杆4的方向为向下。绝缘连杆1在动力单元的驱动下向上移动，推动右传动拐臂2顺时针绕固定较接点21转动，右传动拐臂2上的第一输出铰接点23通过第一传动杆3驱动主动触头杆4向右移动，右传动拐臂2绕固定较接点21顺时针转动，此时，中间传动杆5向右运动以推动驱动杠杆6绕驱动杠杆铰接点61逆时针转动，驱动杠杆6上的驱动杠杆动力输出点63逆时针摆动，驱动杠杆动力输出点63通过电阻触头连杆7驱动电阻动触头杆8向右移动，实现主动触头杆4与电阻动触头杆8的同步动作。传动摆臂9为L形摆臂，其拐点处具有用于铰接到固定机架上的铰接孔，传动摆臂9的一端为动力输入端，动力输入端用于与驱动机构的输出端铰接以在驱动机构动作时带动传动摆臂9绕铰接孔转动。传动摆臂9的另一端同时与两根绝缘连杆1铰接，以在传动摆臂9转动时带动绝缘连杆9动作，整个分合闸过程，传动结构将绝缘连杆1的运动转换成主动触头杆4与电阻动触头杆8的水平运动。
如图1所示，第一断口单元对应的电阻断口传动结构包括左传动拐臂10，左传动拐臂10与右传动拐臂2的摆动轴线平行，左传动拐臂10与右 传动拐臂2沿拐臂的摆动轴线错开。右传动拐臂2的第一传动臂与第二传动臂沿传动拐臂的摆动轴线错开布置，左传动拐臂10的第一传动臂与第二传动臂沿传动拐臂的摆动轴线错开布置，使左传动拐臂10及右传动拐臂2的第一传动臂共面。其他实施例中，左传动拐臂及右传动拐臂的第一传动臂也可以不共面，此时第一传动臂与第二传动臂可以沿传动拐臂的摆动轴线错开布置，也可以不错开布置。
本实施例中，第一传动杆3与主动触杆4位于主触头传动平面内，驱动杠杆6位于电阻触头传动平面内，主触头传动平面与电阻触头传动平面共面，驱动杠杆6的铰接端位于主触头的轴线背向电阻触头的一侧，驱动杠杆6上设有用于避让主动触头杆4和第一传动杆3的避让通道以避免驱动杠杆对主触头的分合闸产生干涉，其他实施例中，可以采用其他方式避免驱动杠杆对主触头的分合闸产生干涉，例如，驱动杠杆铰接点设置在主动触头杆下方，或者主触头传动平面与电阻触头传动平面错开布置，此时不需要在驱动杠杆上设置避让通道。
本实施例中，在断口单元分别处于分闸状态与合闸状态时，驱动杠杆6分别对应分闸位和合闸位，处于分闸位与合闸位的驱动杠杆6在左右方向上分别位于驱动杠杆铰接点61的左右两侧并且关于与电阻触头导向方向垂直的平面对称，在其他实施例中，可以采取其他形式，例如，断口单元处于分合闸时，驱动杠杆动力输出点在水平方向上均位于驱动杠杆铰接点的同一侧，或者，驱动杠杆在处于分闸位时与处于合闸位时分别位于驱动杠杆铰接点的左右两侧，但是与电阻触头导向方向垂直的平面之间的形成的角度具有角度差。
本申请的断路器的电阻断口传动结构与上述断路器的具体实施例中的电阻断口传动结构的结构相同，不再赘述。
以上所述，仅为本申请的较佳实施例，并不用以限制本申请，本申请 的专利保护范围以权利要求书为准，凡是运用本申请的说明书及附图内容所作的等同结构变化，同理均应包含在本申请的保护范围内。
工业实用性
本公开实施例的技术方案，断口传动结构包括传动拐臂、驱动杠杆和中间传动杆；传动拐臂，包括呈L形布置的第一传动臂和第二传动臂，第一传动臂和第二传动臂的连接处设有固定铰接点；第一传动臂，其上设有输入铰接点，输入铰接点用于与驱动机构连接以实现传动拐臂的摆动；第二传动臂，其上设有用于与断路器的主触头传动连接的第一输出铰接点，还设有用于与断路器的电阻触头传动连接的第二输出铰接点；驱动杠杆，位于传动拐臂的靠近电阻断口的一侧，具有铰接端和触头驱动端；触头驱动端与导向设置的电阻触头组件之间铰接有电阻触头连杆，驱动杠杆、电阻触头连杆和电阻触头组件形成曲柄滑块机构，曲柄滑块机构用于在驱动杠杆摆动时带动电阻触头组件导向伸缩；中间传动杆，一端铰接在所述第二输出铰接点上，另一端铰接在驱动杠杆的铰接端和触头驱动端之间，用于在传动拐臂摆动时带动驱动杠杆以费力杠杆的形式摆动。如此，驱动杠杆与中间传动杆以及电阻触头连杆形成费力杠杆，即铰接端形成支点，铰接端与中间传动杆在驱动杠杆上的铰接点之间的部分驱动杠杆形成动力臂，中间传动杆向驱动杠杆输出的力形成动力，铰接端与触头驱动端之间的驱动杠杆形成阻力臂，电阻触头连杆向驱动杠杆施加的阻碍驱动杠杆转动的力形成阻力，通过上述费力杠杆的形式能够增大电阻触头连杆的移动速度，满足对电阻断口的电阻动触头的速度要求，相对于通过设置具有较高的运动速度的驱动机构以满足电阻断口的电阻动触头的速度要求的形式，断路器所需驱动机构的零部件较少、结构简单且造价低。

Claims (10)

  1. 断路器的电阻断口传动结构，其特征在于：包括传动拐臂、驱动杠杆和中间传动杆；
    传动拐臂，包括呈L形布置的第一传动臂和第二传动臂，第一传动臂和第二传动臂的连接处设有固定铰接点；
    第一传动臂，其上设有输入铰接点，输入铰接点用于与驱动机构连接以实现传动拐臂的摆动；
    第二传动臂，其上设有用于与断路器的主触头传动连接的第一输出铰接点，还设有用于与断路器的电阻触头传动连接的第二输出铰接点；
    驱动杠杆，位于传动拐臂的靠近电阻断口的一侧，具有铰接端和触头驱动端；触头驱动端与导向设置的电阻触头组件之间铰接有电阻触头连杆，驱动杠杆、电阻触头连杆和电阻触头组件形成曲柄滑块机构，曲柄滑块机构用于在驱动杠杆摆动时带动电阻触头组件导向伸缩；
    中间传动杆，一端铰接在所述第二输出铰接点上，另一端铰接在驱动杠杆的铰接端和触头驱动端之间，用于在传动拐臂摆动时带动驱动杠杆以费力杠杆的形式摆动。
  2. 根据权利要求1所述的断路器的电阻断口传动结构，其特征在于：所述驱动杠杆的铰接端位于主触头轴线的背向电阻触头的一侧。
  3. 根据权利要求2所述的断路器的电阻断口传动结构，其特征在于：断路器的电阻断口传动结构还包括铰接在所述第一输出铰接点处的第一传动杆，第一传动杆与主触头的主动触杆铰接以在传动驱动杠杆转动时驱动主动触杆运动，第一传动杆与主动触杆位于主触头传动平面内，驱动杠杆位于电阻触头传动平面内，所述主触头传动平面与电阻触头传动平面共面，驱动杠杆上具有用于避让主动触头杆和/或第一传动杆的避让通道。
  4. 根据权利要求2所述的断路器的电阻断口传动结构，其特征在于：断路器的电阻断口传动结构还包括铰接在所述第一输出铰接点处的第一传动杆，第一传动杆与主触头的主动触杆铰接以在传动驱动杠杆转动时驱动主动触杆运动，第一传动杆与主动触杆位于主触头传动平面内，驱动杠杆位于电阻触头传动平面内，所述主触头传动平面与电阻触头传动平面共面，驱动杠杆铰接点设置在主动触杆下方。
  5. 根据权利要求2所述的断路器的电阻断口传动结构，其特征在于：断路器的电阻断口传动结构还包括铰接在所述第一输出铰接点处的第一传动杆，第一传动杆与主触头的主动触杆铰接以在传动驱动杠杆转动时驱动主动触杆运动，第一传动杆与主动触杆位于主触头传动平面内，驱动杠杆位于电阻触头传动平面内，所述主触头传动平面与电阻触头传动平面错开布置。
  6. 根据权利要求3所述的断路器的电阻断口传动结构，其特征在于：所述电阻断口在传动拐臂的轴向上位于主断口的正下方。
  7. 根据权利要求3所述的断路器的电阻断口传动结构，其特征在于：所述中间传动杆与所述主触头传动平面以及电阻触头传动平面共面。
  8. 根据权利要求1或2或3所述的断路器的电阻断口传动结构，其特征在于：所述驱动杠杆具有与电阻触头的分闸状态与合闸状态分别对应的分闸位和合闸位，分闸位和合闸位关于与电阻触头导向方向垂直的平面对称。
  9. 断路器，包括左右对称的第一断口单元和第二断口单元，其特征在于：各断口单元都对应设置有如权利要求1-8任意一项所述的断路器的电阻断口传动结构。
  10. 根据权利要求9所述的断路器，其特征在于：
    第一断口单元对应的电阻断口传动结构包括左传动拐臂，第二断口 单元对应的电阻断口传动结构包括右传动拐臂，左传动拐臂与右传动拐臂的摆动轴线平行，左传动拐臂与右传动拐臂沿拐臂的摆动轴线错开；
    左传动拐臂的第一传动臂与第二传动臂沿传动拐臂的摆动轴线错开布置，右传动拐臂的第一传动臂与第二传动臂沿传动拐臂的摆动轴线错开布置，使左传动拐臂及右传动拐臂的第一传动臂共面。
PCT/CN2020/134364 2019-12-24 2020-12-07 断路器及其电阻断口传动结构 WO2021129369A1 (zh)

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US4499350A (en) * 1982-05-27 1985-02-12 Tokyo Shibaura Denki Kabushiki Kaisha Circuit breaker with overvoltage suppression
CN2896495Y (zh) * 2006-03-20 2007-05-02 西安西开高压电气股份有限公司 800千伏双断口罐式断路器的灭弧室
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