WO2023036023A1 - 一种断路器脱扣装置 - Google Patents

一种断路器脱扣装置 Download PDF

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Publication number
WO2023036023A1
WO2023036023A1 PCT/CN2022/116016 CN2022116016W WO2023036023A1 WO 2023036023 A1 WO2023036023 A1 WO 2023036023A1 CN 2022116016 W CN2022116016 W CN 2022116016W WO 2023036023 A1 WO2023036023 A1 WO 2023036023A1
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Prior art keywords
yoke
iron core
static iron
circuit breaker
tripping device
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PCT/CN2022/116016
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English (en)
French (fr)
Inventor
邱广庭
张海燕
江长生
吴丹卿
贾阳
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伊顿辉能低压电器(江苏)有限公司
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Publication of WO2023036023A1 publication Critical patent/WO2023036023A1/zh

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    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • the invention relates to the field of circuit breakers, in particular to a circuit breaker tripping device.
  • the circuit breaker plays a protective role in the reliable operation of the power system.
  • the tripping device in the circuit breaker is an important part of the protection function. Therefore, a reliable tripping device is extremely important for the circuit breaker. It is the main component for short-circuit protection in the power system. When the short-circuit current reaches a certain value , the tripping device starts to act, and then cuts off the fault circuit to ensure the stable operation of other branches of the power system.
  • solenoid type Existing circuit breaker tripping devices are mainly divided into two types: solenoid type and clap-on type.
  • the solenoid release is mainly used for short-circuit small current protection, and its advantages are high precision of short-circuit protection action current and fast action speed; but the solenoid release has high requirements for the production accuracy of parts, mainly Since the coil group in the solenoid generates heat during operation, the moving iron core expands and the movement of the iron core becomes stuck, resulting in failure of the protection. Therefore, the high-precision solenoid type requires higher manufacturing costs.
  • the advantage of snap-fit releases is that the production cost is low and the number of parts is relatively small, but there are few conductive loops through the magnetic circuit system, so it is not suitable for circuit breakers for small current protection.
  • the present invention provides a circuit breaker tripping device, which can realize small short circuit protection and reduce the sensitivity of parts manufacturing , thereby reducing manufacturing costs.
  • a circuit breaker tripping device including a static iron core, a moving armature, a coil group, a yoke, an extension spring and a bimetal;
  • the static iron core includes a static iron core suction part and a circumferential part connected in sequence;
  • the coil group is wrapped and wound on the circumference of the static iron core, connected with the bimetal and connected in series in the internal main circuit of the circuit breaker;
  • the vertical part of the yoke is fixedly connected to one end of the static iron core, and the horizontal part is arranged above the coil group; the yoke is provided with a rotating part that cooperates with the movable armature and rotates relative to the movable armature;
  • the horizontal direction of the moving armature is provided with a limit part placed above the horizontal part of the yoke to fix the initial position of the yoke; extending downward in the vertical direction is provided with a moving armature that cooperates with the suction part of the static iron core piece;
  • the upper end of the extension spring is hung on the movable armature, and the lower end is hung on the horizontal part of the yoke.
  • the end of the static iron core including the circumferential portion is provided with an external threaded connection portion; the external threaded connection portion is connected to the vertical portion of the yoke through threads.
  • the yoke includes a first connecting portion, a second connecting portion and a third connecting portion forming a vertical connecting structure with each other.
  • the first connecting part is arranged in the horizontal direction, and a protruding rotating boss is respectively provided on both sides of the free end, and the rotating boss cooperates with the moving armature and rotates relatively, and one side of the middle part of the first connecting part is also
  • a first extension spring hanging point it is used for fixing the position of the lowermost end of the extension spring
  • the second connecting part is arranged vertically, and its center is provided with an internal tapping threaded hole matched with the threaded connection of the static iron core
  • the third connecting portion is arranged horizontally, and the horizontal extension direction is opposite to that of the first connecting portion.
  • the moving armature includes an armature body, and a first extension arm and a second extension arm are respectively extended upwards on both sides of the armature body; a limit part is horizontally extended in the middle of the armature body; a limit part is set on the limit part Above the horizontal part of the yoke.
  • the uppermost end of the first extension arm is provided with a second extension spring hanging point for fixing the uppermost position of the extension spring; the uppermost end of the second extension arm is provided with a moving iron core striking boss; two The lower end of the extension arm is symmetrically provided with a rotating circular hole; the rotating circular hole cooperates with the rotating part on the yoke.
  • the coil group includes a coil, and the two wire ends of the coil are respectively provided with a first coil welding point and a second coil welding point; the first coil welding point is welded to the main circuit, and the second coil welding point Extend upward and be welded to the upper part of the bimetal; the bimetal extend downward and connect to the end of the static iron core; together they form a complete closed magnetic circuit.
  • the wire in the coil is a non-magnetic current-carrying conductor coated with insulating varnish on the surface; the multi-turn feature of the coil group can provide stronger attraction force.
  • the present invention has the following advantages:
  • the present invention retains the coil group in the solenoid tripping device, and adopts the characteristics of multiple turns of the coil group to effectively increase the magnetic induction intensity of the static iron core in the magnetic circuit system, thereby increasing the static iron core and the moving armature
  • the suction force between them ensures the short-circuit protection capability of the product's small current circuit breaker
  • the present invention effectively reduces the sensitivity of parts manufacturing and the requirements for parts precision through the working mode of the moving armature and the yoke iron rotation, reduces the number of parts, thereby increasing the reliability of the product, and effectively reducing the manufacturing cost.
  • Fig. 1 is a schematic structural diagram of a circuit breaker release device in embodiment 1;
  • Fig. 2 is a schematic structural diagram of the initial working state of the circuit breaker release device in embodiment 1;
  • Fig. 3 is a schematic diagram of the working state structure of the circuit breaker release device in embodiment 1;
  • Fig. 4 is the static iron core structure schematic diagram in embodiment 1;
  • Fig. 5 is the structural representation of moving armature in embodiment 1;
  • FIG. 6 is a schematic diagram of the structure of the yoke in Embodiment 1.
  • FIG. 6 is a schematic diagram of the structure of the yoke in Embodiment 1.
  • the present invention discloses a tripping device for a circuit breaker, which includes a static iron core 1, a moving armature 2, a coil group 3, a yoke 4, a tension spring 5 and a bimetal 6;
  • the static iron core 1 includes a static iron core suction part 11 , a circumferential part 12 and an external thread connection part 13 connected in sequence.
  • the movable armature 2 includes an armature body 23, and a first extension arm 24 and a second extension arm 25 are respectively extended upward on both sides of the armature body 23; Extending downward, there is a movable armature suction piece 22 that cooperates with the static iron core suction part 11;
  • the uppermost end of the first extension arm 24 is provided with a second extension spring hanging point 241 for fixing the uppermost position of the extension spring 5; the uppermost end of the second extension arm 25 is provided with a moving iron core striking boss 251; The lower end of each extension arm is symmetrically provided with a rotating circular hole 26;
  • the yoke 4 includes a first connection portion 41 , a second connection portion 42 and a third connection portion 43 forming a vertical connection structure with each other.
  • the first connecting part 41 is arranged in the horizontal direction, and a protruding rotating boss 411 is respectively provided on both sides of the free end, and the rotating boss 411 cooperates with the two rotating round holes 26 on the moving armature 2 and rotates relatively.
  • One side of the middle part of the first connecting portion 41 is also provided with a first extension spring hanging point 412; it is used for fixing the lowermost position of the extension spring 5; between the two;
  • the second connecting portion 42 is arranged vertically, and its central position is provided with an internal tapping threaded hole 421 for threaded connection with the externally threaded connecting portion 13 on the static iron core 1;
  • the third connecting portion 43 is arranged horizontally, and its horizontal extension direction is opposite to that of the first connecting portion 41 .
  • the limiting part 21 on the moving armature 2 is arranged above the first connecting part 41 arranged in the horizontal direction of the yoke 4; the limiting part 21 is in contact with the yoke 4 under the force of the extension spring 5 In this way, the initial position of the movable armature 2 is fixed; the first connecting portion 41 is arranged above the coil group 3;
  • the coil group 3 includes a coil 31, and the coil 31 is wrapped and wound on the outer circumference of the circumferential portion 12 of the static iron core 1; the two wire ends of the coil 31 are respectively provided with a first coil welding point 32 and a second coil welding point 33; A coil welding point 32 is welded to the main circuit, and the second coil welding point 33 extends upward and is welded to the upper part of the bimetal 6; the bimetal 6 extends downward and is connected to the end of the static iron core 1 and is connected to the outer spiral The end faces of the connecting parts 13 are connected; they together form a complete closed magnetic circuit; the coil group 3 and the bimetal 6 form a complete closed magnetic circuit and are connected in series in the internal main circuit of the circuit breaker.
  • the wires in the coil 31 are non-magnetic current-carrying conductors coated with insulating varnish on the surface; the multi-turn characteristics of the coil group can provide stronger attraction force.
  • FIG. 2 it is the initial state of the tripping device of the circuit breaker of the present invention.
  • the moving armature 2 and the static iron core 1 remain relatively static.
  • the moving armature engaging surface 22 There will be a certain suction force between the suction surface 11 of the static iron core.
  • the suction force is greater than the reaction force generated by the tension spring 5, the first connecting part 41 on the yoke 4 will be driven to generate a limit on the movable armature 2.
  • the active force of the bit part 21 causes the relative rotation of the movable armature 2 relative to the yoke 4 .
  • the moving armature 2 after relative rotation is in the suction state, at this time the suction surface 22 of the moving armature 2 is in a state of bonding with the suction surface 11 of the static iron core, and the moving iron core hits the boss 251 at the same time Push up the mechanism linked with it to disconnect the circuit, and finally the circuit breaker realizes short-circuit protection.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

本发明公开了一种断路器脱扣装置，属于低压电器技术领域；包括静铁芯、动衔铁、线圈组、轭铁、拉簧以及双金属片；动衔铁与轭铁相互配合且能相对于轭铁转动，同时在动衔铁上设有限位部件作用于轭铁，形成对动衔铁初始位置的固定；轭铁与静铁芯紧固连接，本发明一方面保留了螺线管式脱扣装置中的线圈组，采用线圈组多圈数的特点能够有效增加磁回路系统中静铁芯的磁感应强度，从而增大静铁芯与动衔铁之间的吸力，进而保证产品小电流断路器的短路保护能力；另一方面通过动衔铁与轭铁旋转运动的工作方式，有效降低零件制造的敏感度以及对零件精度的要求，减少零件数量，从而增加产品的可靠性，并有效降低生产制造成本。

Description

一种断路器脱扣装置 技术领域
本发明涉及断路器领域，尤其是一种断路器脱扣装置。
背景技术
断路器作为电力系统中的核心部件，其对电力系统的可靠运行起到保护作用。同时，断路器中的脱扣装置作为实现保护功能重要组成部分，因此可靠的脱扣装置对于断路器来说极其重要，是承担电力系统中的短路保护工作的主要部件，当短路电流达到一定值时，脱扣装置开始动作，进而切断故障回路，保证电力系统其他支路的稳定运行。
现有的断路器脱扣装置主要分为两种：螺线管式和拍合式。其中螺线管式脱扣器主要用于短路小电流保护，其优点是短路保护动作电流的精度高、动作速度快；但是螺线管式脱扣器对零件的制作精度要求较高，主要是由于螺线管中的线圈组在工作过程会发热，导致动铁芯膨胀而引起铁芯运动卡滞，引起保护失效，因此高精度的螺线管式需要更高的制造成本。拍合式脱扣器的优点是生产成本较低、零件数量相对较少，但是通过磁路系统的导电回路较少，因此不适用于小电流保护的断路器。
发明内容
发明目的：为了解决现有技术所存在的生产制造成本与小电流短路保护的问题，本发明提供了一种断路器脱扣装置，可实现小短路电流的保护，且降低了零件制造的敏感度，从而降低生产制造成本。
技术方案：为达到上述目的，本发明可采用如下技术方案：一种断路器脱扣装置，包括静铁芯、动衔铁、线圈组、轭铁、拉簧以及双金属片；
所述静铁芯包括依次连接的静铁芯吸合部和圆周部；
所述线圈组包裹缠绕设于静铁芯的圆周部，与双金属片连接并串联于断路器内部主回路中；
所述轭铁竖直部固定连接至静铁芯一端，水平部设于线圈组上方；所述轭铁上设有与动衔铁相互配合且相对于动衔铁转动的转动部件；
所述动衔铁水平方向设有置于轭铁水平部上方的限位部件，对轭铁的初始位置进行固定；竖直方向往下延伸设有与静铁芯吸合部配合的动衔铁吸合片；
所述拉簧上端挂设于动衔铁上，下端挂设于轭铁的水平部上。
更进一步的，所述静铁芯包括圆周部的端部设有外螺纹连接部；所述外螺纹连接部通过螺纹连接至轭铁的竖直部。
更进一步的，所述轭铁包括相互形成垂直连接结构的第一连接部、第二连接部以及第三连接部。
更进一步的，所述第一连接部水平方向设置，自由端两侧分别设有一个凸出的转动凸台，所述转动凸台与动衔铁配合并相对转动，第一连接部中部一侧还设有第一拉簧挂点；用于拉簧最下端位置的固定；所述第二连接部竖直方向设置，其中心位置设有一个与静铁芯螺纹连接相配合的内攻丝螺纹孔；所述第三连接部水平设置，水平延伸方向与第一连接部相反。
更进一步的，所述动衔铁包括衔铁本体，所述衔铁本体两侧分别往上延伸设有第一延伸臂和第二延伸臂；衔铁本体中部水平延伸设有限位部件；所述限位部件设于轭铁水平部上方.
更进一步的，所述第一延伸臂最上端设有第二拉簧挂点，用于拉簧最上端位置的固定；所述第二延伸臂最上端设有动铁芯打击凸台；两个延伸臂的下端对称设有转动圆孔；所述转动圆孔与轭铁上的转动部件配合。
更进一步的，所述线圈组包括线圈、线圈两个线端分别设有第一线圈焊接点以及第二线圈焊接点；所述第一线圈焊接点焊接至主回路，所述第二线圈焊接点往上延伸焊接至双金属片上部；所述双金属片往下延伸连接至静铁芯端部；共同形成完整的闭合磁回路。
所述线圈中的导线为表面涂覆绝缘漆的非导磁载流导体；通过线圈组的多圈数特征可提供更强的吸合力。
有益效果：本发明具有以下优点：
(1)本发明保留了螺线管式脱扣装置中的线圈组，采用线圈组多圈数的特点能够有效增加磁回路系统中静铁芯的磁感应强度，从而增大静铁芯与动衔铁之间的吸力，进而保证产品小电流断路器的短路保护能力；
(2)本发明通过动衔铁与轭铁旋转运动的工作方式，有效降低零件制造的敏感度以及对零件精度的要求，减少零件数量，从而增加产品的可靠性，并有效降低生产制造成本。
附图说明
图1是实施例1中断路器脱口装置结构示意图；
图2是实施例1中断路器脱口装置初始工作状态结构示意图；
图3是实施例1中断路器脱口装置吸合工作状态结构示意图；
图4是实施例1中静铁芯结构示意图；
图5是实施例1中动衔铁结构示意图；
图6是实施例1中轭铁结构示意图。
具体实施方式
实施例1：
请参考图1-图6所示，本发明公开了一种断路器脱扣装置，包括静铁芯1、动衔铁2、线圈组3、轭铁4、拉簧5以及双金属片6；
所述静铁芯1包括依次连接的静铁芯吸合部11、圆周部12以及端部的外螺纹连接部13。
所述动衔铁2包括衔铁本体23，所述衔铁本体23两侧分别往上延伸设有第一延伸臂24和第二延伸臂25；衔铁本体23中部水平延伸设有限位部件21；竖直方向往下延伸设有与静铁芯吸合部11配合的动衔铁吸合片22；
所述第一延伸臂24最上端设有第二拉簧挂点241，用于拉簧5最上端位置的固定；所述第二延伸臂25最上端设有动铁芯打击凸台251；两个延伸臂的下端对称设有转动圆孔26；所述转动圆孔26与轭铁4上的转动部件配合。
所述轭铁4包括相互形成垂直连接结构的第一连接部41、第二连接部42以及第三连接部43。
所述第一连接部41水平方向设置，自由端两侧分别设有一个凸出的转动凸台411，所述转动凸台411与动衔铁2上的两个转动圆孔26配合并相对转动，
第一连接部41中部一侧还设有第一拉簧挂点412；用于拉簧5最下端位置的固定；与第一延伸臂24最上端的第二拉簧挂点241将拉簧5限定在二者之间；
所述第二连接部42竖直方向设置，其中心位置设有一个与静铁芯1上的外螺纹连接部13进行螺纹连接相配合的内攻丝螺纹孔421；
所述第三连接部43水平设置，水平延伸方向与第一连接部41相反。
进行组装时，所述动衔铁2上的限位部件21设于轭铁4水平方向设置的第一连接部41的上方；限位部件21在拉簧5的力的作用下与轭铁4接触从而实现动衔铁2初始位置的固定；所述第一连接部41设于线圈组3的上方；
所述线圈组3包括线圈31，线圈31包裹缠绕设于静铁芯1的圆周部12外周；线圈31两个线端分别设有第一线圈焊接点32以及第二线圈焊接点33；所述第一线圈焊接点32焊接至主回路，所述第二线圈焊接点33往上延伸焊接至双 金属片6上部；所述双金属片6往下延伸连接至静铁芯1端部并与外螺旋连接部13端面连接；共同形成完整的闭合磁回路；所述线圈组3与双金属片6之间形成完整的闭合磁回路并串联于断路器内部主回路中。
其中，所述线圈31中的导线为表面涂覆绝缘漆的非导磁载流导体；通过线圈组的多圈数特征可提供更强的吸合力。
工作过程：
如图2所示，为本发明断路器脱扣装置的初始状态，动衔铁2与静铁芯1保持相对静止，当流过线圈组3的短路电流达到一定值时，动衔铁吸合面22与静铁芯吸合面11之间会产生一定的吸合力，当吸合力大于拉簧5所产生的反力时，带动轭铁4上的第一连接部41产生对动衔铁2上的限位部件21的作用力，引发动衔铁2相对于轭铁4的相对转动。
如图3所示，进行相对转动后的动衔铁2处于吸合状态，此时动衔铁2的吸合面22与静铁芯吸合面11处于贴合状态，同时动铁芯打击凸台251往上顶开与之联动的机构断开电路，最终断路器实现短路保护。

Claims (8)

  1. 一种断路器脱扣装置，其特征在于包括静铁芯(1)、动衔铁(2)、线圈组(3)、轭铁(4)、拉簧(5)以及双金属片(6)；
    所述静铁芯(1)包括依次连接的静铁芯吸合部(11)和圆周部(12)；
    所述线圈组(3)包裹缠绕设于静铁芯(1)的圆周部(12)，与双金属片(6)连接并串联于断路器内部主回路中；
    所述轭铁(4)竖直部固定连接至静铁芯(1)一端，水平部设于线圈组(3)上方；所述轭铁(4)上设有与动衔铁(2)相互配合且相对于动衔铁(2)转动的转动部件；
    所述动衔铁(2)水平方向设有置于轭铁(4)水平部上方的限位部件(21)，对轭铁(4)的初始位置进行固定；竖直方向往下延伸设有与静铁芯吸合部(11)配合的动衔铁吸合片(22)；
    所述拉簧(5)上端挂设于动衔铁(2)上，下端挂设于轭铁(4)的水平部上。
  2. 根据权利要求1所述的断路器脱扣装置，其特征在于：所述静铁芯(1)包括圆周部(12)的端部设有外螺纹连接部(13)；所述外螺纹连接部(13)通过螺纹连接至轭铁(4)的竖直部。
  3. 根据权利要求1所述的断路器脱扣装置，其特征在于：所述轭铁(4)包括相互形成垂直连接结构的第一连接部(41)、第二连接部(42)以及第三连接部(43)。
  4. 根据权利要求3所述的断路器脱扣装置，其特征在于：所述第一连接部(41)水平方向设置，自由端两侧分别设有一个凸出的转动凸台(411)，所述转动凸台(411)与动衔铁(2)配合并相对转动，第一连接部(41)中部一侧还设有第一拉簧挂点(412)；用于拉簧(5)最下端位置的固定；所述第二连接部(42)竖直方向设置，其中心位置设有一个与静铁芯(1)螺纹连接相配合的内攻丝螺纹孔(421)；所述第三连接部(43)水平设置，水平延伸方向与第一连接部(41)相反。
  5. 根据权利要求1所述的断路器脱扣装置，其特征在于：所述动衔铁(2)包括衔铁本体(23)，所述衔铁本体(23)两侧分别往上延伸设有第一延伸臂(24)和第二延伸臂(25)；衔铁本体(23)中部水平延伸设有限位部件(21)；所述限位部件(21)设于轭铁(4)水平部上方.
  6. 根据权利要求5所述的断路器脱扣装置，其特征在于：所述第一延伸臂 (24)最上端设有第二拉簧挂点(241)，用于拉簧(5)最上端位置的固定；所述第二延伸臂(25)最上端设有动铁芯打击凸台(251)；两个延伸臂的下端对称设有转动圆孔(26)；所述转动圆孔(26)与轭铁(4)上的转动部件配合。
  7. 根据权利要求1所述的断路器脱扣装置，其特征在于：所述线圈组(3)包括线圈(31)、线圈(31)两个线端分别设有第一线圈焊接点(32)以及第二线圈焊接点(33)；所述第一线圈焊接点(32)焊接至主回路，所述第二线圈焊接点(33)往上延伸焊接至双金属片(6)上部；所述双金属片(6)往下延伸连接至静铁芯(1)端部；共同形成完整的闭合磁回路。
  8. 根据权利要求7所述的断路器脱扣装置，其特征在于：所述线圈(31)中的导线为表面涂覆绝缘漆的非导磁载流导体。
PCT/CN2022/116016 2021-09-07 2022-08-31 一种断路器脱扣装置 WO2023036023A1 (zh)

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CN113675051A (zh) * 2021-09-07 2021-11-19 江苏辉能电气有限公司 一种断路器脱扣装置
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