WO2021142912A1 - Nouveau disjoncteur mécanique - Google Patents

Nouveau disjoncteur mécanique Download PDF

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Publication number
WO2021142912A1
WO2021142912A1 PCT/CN2020/079474 CN2020079474W WO2021142912A1 WO 2021142912 A1 WO2021142912 A1 WO 2021142912A1 CN 2020079474 W CN2020079474 W CN 2020079474W WO 2021142912 A1 WO2021142912 A1 WO 2021142912A1
Authority
WO
WIPO (PCT)
Prior art keywords
base
circuit breaker
lock
sliding groove
operating mechanism
Prior art date
Application number
PCT/CN2020/079474
Other languages
English (en)
Chinese (zh)
Inventor
彭苏富
徐象兵
旷荣昌
Original Assignee
美高电气科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 美高电气科技有限公司 filed Critical 美高电气科技有限公司
Publication of WO2021142912A1 publication Critical patent/WO2021142912A1/fr

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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
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release

Definitions

  • the invention relates to the technical field of circuit breakers, in particular to a new type of mechanical mechanism circuit breaker.
  • Miniature circuit breakers refer to protective electrical appliances installed on terminal power distribution lines. They are mainly used for overload and short-circuit protection of circuits and electrical equipment. Miniature circuit breakers are generally composed of operating mechanisms, electromagnetic tripping mechanisms, thermal tripping mechanisms, arc extinguishing mechanisms, etc.
  • the operating mechanism refers to the components used to open and close the circuit breaker. The operating mechanism must ensure the reliable closure of the circuit breaker and the rapid opening of the circuit breaker in the fault state. The performance of the operating mechanism directly affects the circuit breaker’s performance. Function.
  • the invention patent application with application publication number CN110459447A and application publication date November 15, 2019 discloses a circuit breaker operating mechanism. Under normal conditions, by turning the U-shaped push rod on the handle to drive the bracket assembly composed of the contact bracket, the jumper, the lock, and the moving contact to move, the moving contact and the static contact are connected or disconnected to achieve the close , Opening. When the line fails, the trip and the lock are separated to realize the free opening of the product and protect the line. Because the transmission mechanism between the operating handle and the moving contact involves many parts and complex structure, it is prone to failure, and the overlap area between the jumper and the lock is small, and it requires high dimensional accuracy and high component strength.
  • the present invention provides a circuit breaker operating mechanism, which is characterized in that it includes an operating handle, a lock catch, and a base on which a moving contact assembly is installed; the operating handle is provided with a connector; the lock catch
  • the base includes a lock shaft and a lock stop structure; the base includes a base shaft and a slide groove provided with a base stop structure; a part of the connector is located in the slide groove, and one end of the slide groove
  • a chute limiting structure matched with the lock limiting structure is provided.
  • the operating handle when the circuit is normal, the operating handle is interlocked with the lock and the base through its connector, and the opening and closing is performed by the operating handle; when the circuit is faulty, the interlock between the connector and the base is disassembled to realize automatic product tripping , Protect the line.
  • the chute limit structure is a limit step provided at one end of the chute.
  • the sliding groove limiting structure is a recess provided at one end of the sliding groove.
  • the lock catch limiting structure is a limiting opening provided on the lock catch facing the other end of the sliding groove.
  • the lock shaft is provided with a lock reset member, so that the lock has a pre-tightening force that rotates in a positive direction;
  • the base shaft is provided with a base reset member, so that the base has The pre-tightening force that rotates in the opposite direction;
  • the limit step is arranged close to the end of the chute that is located forward in the opposite direction.
  • the lock buckle includes a magnetic tripping action portion.
  • the lock buckle includes a thermal tripping action portion.
  • the connecting piece is a U-shaped connecting rod, one end of the connecting piece is connected with the handle body, and the other end of the connecting piece is located in the sliding groove.
  • the present invention also provides a new mechanical mechanism circuit breaker, which is characterized in that: a casing, a tripping mechanism and an operating mechanism provided in the casing; the operating mechanism is as described in any one of the above.
  • the operating handle when the circuit is normal, the operating handle is interlocked with the lock and the base through its connector, and the opening and closing is performed by the operating handle; when the circuit is faulty, the interlock between the connector and the base is disassembled to realize automatic product tripping , Protect the line.
  • it also includes an arc extinguishing device arranged in the housing.
  • the handle connector is located in the chute and the limit port in the locked or unlocked state, which reduces the dimensional accuracy and strength requirements of the parts and improves the reliability of the protection.
  • Fig. 1 is a schematic diagram of the internal structure of a circuit breaker according to an embodiment of the present invention.
  • Figure 2 is a second schematic diagram of the internal structure of the circuit breaker according to the embodiment of the present invention.
  • Fig. 3 is an assembly schematic diagram of the operating mechanism of the circuit breaker according to the embodiment of the present invention.
  • a circuit breaker includes a movable contact 11 and a static contact 12, and a first connection screw 111 and a second connection screw 121 provided corresponding to the movable contact 11 and the static contact 12.
  • the first terminal screw 111 and the second terminal screw 121 are the movable terminal and the static terminal.
  • the first connection screw 111 and the second connection screw 121 are respectively connected to a first connection line and a second connection line external to the circuit breaker.
  • the movable contact 11 is connected to the external first connecting wire through the flexible connection 131, the bimetallic strip 2, the connecting strip 133, the wiring board 134, and the first wiring screw 111.
  • the bimetal 2 will bend when heated, and serve as a thermal trip mechanism of the circuit breaker.
  • the bimetal 2 and the static contact 12 are connected to an externally connected second connecting wire through the second connecting screw 121, and an electromagnetic tripping structure 3 for tripping is also connected between the two.
  • an electromagnetic tripping structure 3 for tripping is also connected between the two.
  • the arc extinguishing device is in the prior art, and generally includes a magnetic blowing system and an arc extinguishing chamber 4.
  • the magnetic blowing system is used to blow the arc to the arc extinguishing chamber 4 to achieve rapid arc extinguishing.
  • the operating mechanism of the circuit breaker is a new type of mechanical structure, which includes an operating handle 51 rotatably installed in the housing, a lock 52, and a base 53 on which a moving contact assembly is installed.
  • the operating handle includes a connecting piece 512 and an operating handle main body 511 made of plastic material.
  • the connecting member 512 in this embodiment is a U-shaped connecting rod, one end of which is fixedly connected to the handle body 511, and the other end is used to cooperate with the lock catch 52 and the base 53 to interlock.
  • the lock 52 includes a lock body made of plastic material. The center of the lock body is rotatably fixed in the housing by the lock shaft 521.
  • One side of the lock body is provided with a corresponding connection The buckle limiting structure 522 of the piece 512.
  • a torsion spring 55 is provided on the lock shaft 521 as a lock reset member, so that the lock has a pre-tightening force toward the positive direction (clockwise as shown in FIGS. 1 and 2).
  • the base 53 is rotatably fixed in the housing by a base shaft 531.
  • the part of the base 53 above the base shaft is provided with a sliding groove 532 corresponding to the connecting piece 512.
  • the part of the base 53 below the base shaft can be
  • the movable contact mounting plate 533 is rotatably installed, and the movable contact 11 can be installed on the movable contact mounting plate 533 by welding, clamping, hot riveting, screw connection, torsion spring connection and other connection methods in the prior art.
  • a torsion spring 55 is provided on the base rotating shaft 531 as a base restoring member, so that the base has a pretension force facing the opposite direction (clockwise as shown in FIGS. 1 and 2).
  • the movable contact mounting plate 533 and the movable contact 11 constitute a movable contact assembly mounted on the base 53.
  • One end of the connecting piece 512 extends into the sliding groove 532.
  • a sliding groove limiting structure 5321 is provided at the end of the sliding groove 532 close to the operating handle, and the sliding groove limiting structure is arranged close to the front end of the sliding groove in the opposite direction.
  • the sliding groove limiting structure may be a limiting step provided in the sliding groove 532 or a groove provided in the sliding groove 532.
  • the locking stop structure 522 may be an opening or a groove that is disposed toward the chute stop structure, or may be a clamping structure for clamping the connecting member 512.
  • the lock catch limiting structure 522 in this embodiment is a limiting opening on the lock facing the chute that is not provided.
  • One end of the connecting piece 512 is located in the sliding groove.
  • the connecting piece 512 Due to the blocking of the edge of the groove or the limiting step, the connecting piece 512 is limited in the groove of the sliding groove or the space between the limiting step of the sliding groove and the end of the sliding groove. At the same time, the connecting piece 512 is also located in the limit opening of the lock, so that it can be linked with the lock, so that the operating handle, the connecting piece of the operating handle, the base, and the lock constitute a four-bar structure, and the circuit breaker can be controlled by the operating handle Open and close.
  • the magnetic tripping action portion 523 corresponds to the iron core of the magnetic tripping structure
  • the thermal tripping structure corresponds to the bimetallic setting of the thermal tripping structure.
  • the bimetallic sheet When the overload current of the main circuit of the circuit breaker is generated, the bimetallic sheet is heated and bent to push the lock buckle to overcome the pre-tightening force and rotate in the positive direction (that is, the counterclockwise direction in Figures 1 and 2), so that the connector, the lock buckle, and the base
  • the base When the base is unlocked, the base rotates in a clockwise direction under the action of the pre-tightening force, and the sliding groove of the base reserves space for the connecting piece when the base rotates to prevent interference with the rotation of the base.
  • the rotation of the base 53 further drives the movable contact mounted on it to separate from the static contact.
  • the electromagnetic attraction force generated by the current flowing through the coil of the magnetic tripping mechanism is greater than the reverse elastic force of the magnetic tripping mechanism, and the iron core acts on the magnetic tripping part to push the lock to overcome the pre-tightening force Rotate in the positive direction (that is, the counterclockwise direction in Figures 1 and 2) to unlock the connector, the lock and the base.
  • the base rotates in the clockwise direction under the action of the pre-tightening force, and the base slides.
  • the groove reserves space for the connecting piece to prevent interference with the rotation of the base.
  • the invention has the following beneficial effects: it does not need to use jumpers, reduces material costs, improves production efficiency, has a simple structure, and is convenient for later automated assembly; fault action transmission lines are shortened, action time is shortened, and breaking performance is also improved; handle connection The parts are located in the chute and the limit opening in the locked or unlocked state, which reduces the dimensional accuracy and strength requirements of the parts and improves the reliability of the protection.

Abstract

La présente invention porte sur le domaine technique des disjoncteurs et, en particulier, sur un nouveau disjoncteur mécanique. Un mécanisme d'actionnement du disjoncteur comprend une poignée d'actionnement, un loquet de verrouillage et une base pourvue d'un ensemble de contact mobile. La poignée d'actionnement est pourvue d'un élément de liaison. Le loquet de verrouillage comprend un arbre rotatif de loquet de verrouillage et une structure de limitation de loquet de verrouillage. La base comprend un arbre rotatif de base et une rainure de coulissement pourvue d'une structure de limitation de base. Une partie de l'élément de liaison est située dans la rainure de coulissement, et une structure de limitation de rainure de coulissement correspondant à la structure de limitation de loquet de verrouillage est disposée à une extrémité dans la rainure de coulissement. Selon la solution technique, lorsqu'un circuit est normal, la poignée de commande est verrouillée avec le loquet de verrouillage et la base au moyen de l'élément de liaison, et l'ouverture et la fermeture sont réalisées au moyen de la poignée de commande ; et lorsqu'un défaut de circuit se produit, le verrouillage entre l'élément de liaison et la base est désintégré, de telle sorte qu'un déclenchement automatique d'un produit est obtenu, et le circuit est protégé.
PCT/CN2020/079474 2020-01-15 2020-03-16 Nouveau disjoncteur mécanique WO2021142912A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010040383.0 2020-01-15
CN202010040383.0A CN111243911A (zh) 2020-01-15 2020-01-15 一种新型力学机构断路器

Publications (1)

Publication Number Publication Date
WO2021142912A1 true WO2021142912A1 (fr) 2021-07-22

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CN (1) CN111243911A (fr)
WO (1) WO2021142912A1 (fr)

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CN106571271A (zh) * 2016-08-31 2017-04-19 厦门宏发开关设备有限公司 一种联锁机构、具备该联锁机构的电控设备以及断路器
CN107275161A (zh) * 2017-06-27 2017-10-20 浙江美格尔电气科技有限公司 一种小型断路器
CN108493070A (zh) * 2018-06-08 2018-09-04 乐清市赛翔电气有限公司 一种用于断路器的电磁脱扣机构及其断路器
CN208460695U (zh) * 2018-07-11 2019-02-01 浙江诺科电气科技股份有限公司 小型断路器
CN110459447A (zh) * 2019-09-11 2019-11-15 浙江友路电气有限公司 一种动触头安装结构、操作机构及小型断路器

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CN201838534U (zh) * 2010-09-16 2011-05-18 方华朋 一种小型断路器的灭弧机构
CN204905191U (zh) * 2015-09-18 2015-12-23 乐清市乐翔电气有限公司 一种低压断路器的操作结构
CN105957777A (zh) * 2016-06-06 2016-09-21 温州罗格朗电器有限公司 一种带漏电故障指示功能漏电断路器
CN206947275U (zh) * 2017-07-01 2018-01-30 环宇集团浙江高科股份有限公司 塑壳断路器
CN207082493U (zh) * 2017-08-24 2018-03-09 乐清市也为电气有限公司 一种漏电断路器的试验装置取电结构
CN208225826U (zh) * 2018-06-08 2018-12-11 乐清市赛翔电气有限公司 一种小型断路器操作机构
CN209199866U (zh) * 2018-09-17 2019-08-02 美高电气科技有限公司 断路器
CN109243932B (zh) * 2018-10-11 2024-04-09 上海永继电气股份有限公司 一种断路器操作系统
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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106571271A (zh) * 2016-08-31 2017-04-19 厦门宏发开关设备有限公司 一种联锁机构、具备该联锁机构的电控设备以及断路器
CN107275161A (zh) * 2017-06-27 2017-10-20 浙江美格尔电气科技有限公司 一种小型断路器
CN108493070A (zh) * 2018-06-08 2018-09-04 乐清市赛翔电气有限公司 一种用于断路器的电磁脱扣机构及其断路器
CN208460695U (zh) * 2018-07-11 2019-02-01 浙江诺科电气科技股份有限公司 小型断路器
CN110459447A (zh) * 2019-09-11 2019-11-15 浙江友路电气有限公司 一种动触头安装结构、操作机构及小型断路器

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