WO2015070731A1 - 断路器合闸电阻脱扣机构及使用该机构的断路器 - Google Patents

断路器合闸电阻脱扣机构及使用该机构的断路器 Download PDF

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Publication number
WO2015070731A1
WO2015070731A1 PCT/CN2014/090559 CN2014090559W WO2015070731A1 WO 2015070731 A1 WO2015070731 A1 WO 2015070731A1 CN 2014090559 W CN2014090559 W CN 2014090559W WO 2015070731 A1 WO2015070731 A1 WO 2015070731A1
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WIPO (PCT)
Prior art keywords
switch
shaft
circuit breaker
rotating shaft
arm
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PCT/CN2014/090559
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English (en)
French (fr)
Inventor
陈亚亚
钟建英
李付永
李文艺
孙龙勇
张帆
张洪涛
Original Assignee
国家电网公司
河南平高电气股份有限公司
平高集团有限公司
陈亚亚
钟建英
李付永
李文艺
孙龙勇
张帆
张洪涛
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Application filed by 国家电网公司, 河南平高电气股份有限公司, 平高集团有限公司, 陈亚亚, 钟建英, 李付永, 李文艺, 孙龙勇, 张帆, 张洪涛 filed Critical 国家电网公司
Publication of WO2015070731A1 publication Critical patent/WO2015070731A1/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
    • H01H33/42—Driving 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
    • H01H33/04—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

Definitions

  • the present invention relates to the field of circuit breakers, and more particularly to a circuit breaker closing resistor tripping mechanism and a circuit breaker using the same.
  • the circuit breaker In the ultra-high voltage power grid, the circuit breaker is combined with the idle long line, especially when the power supply voltage amplitude and the line residual voltage are reversed. Due to the sudden change of the line parameters, the electromagnetic energy oscillation on the power grid will cause a large overvoltage. In order to limit this closing overvoltage, the closing resistor is often used to convert part of the electric energy in the power grid into heat energy, so as to weaken the electromagnetic oscillation and limit the overvoltage.
  • the duration of the flow of the resistive element must be short. Therefore, when the circuit breaker is actually running, it is required that the resistance contact should be closed before the arc extinguishing chamber contact, and after the time ⁇ t, the arc extinguishing chamber contact is closed. Due to the above reasons, the allowable energization time when the parallel resistance is closed is very short. When the switch is closed, the transmission mechanism should ensure that the resistance fracture is connected before the main fracture. Then, after the main fracture is turned on, there are two kinds of work for the resistance fracture. the way. First, the resistance element is immediately separated from the operation.
  • the advantage of this method is that the resistance element is highly reliable in the opening position after the closing operation, the resistance contact does not operate during the opening operation, and the operation power during the opening is small. .
  • the second is to be kept in the closing position after being short-circuited by the main fracture.
  • a circuit breaker closing resistor tripping mechanism including a mechanism box, wherein the transmission box is equipped with a transmission component through a rotating shaft, and the transmission component is provided with two a hinge point, the hinge axes of the two hinge points are parallel to the rotating shaft; the rotating shaft is further equipped with a turning arm and a paddle switch, the turning arm is rotatably engaged with the rotating shaft, and the switch shaft is rotated between the two ends thereof, and the switch shaft is Parallel to the rotating shaft and on the outer peripheral surface, a radial notch for giving way to the dial switch is disposed.
  • the end of the arm away from the rotating shaft is also hinged with a resistance link for driving and closing the closing resistor, and the resistor is connected.
  • a linkage connecting member is arranged between the rod and the switch shaft; in the process of closing the circuit breaker, the rotating shaft is driven by the transmission The component rotates and toggles the switch shaft through the dial switch to drive the arm to swing around the rotating shaft.
  • the linkage connecting member drives the switch shaft to rotate during the swinging of the arm.
  • the circuit breaker is closed, the gap on the switch shaft is correctly dialed.
  • a plate switch that resets and drives the closing resistor to open.
  • One end of the switch shaft is provided with an eccentric pin handle, and the linkage connecting member is strip-shaped, one end of which is hinged on the resistance link, and the other end is hung on the pin handle of the switch shaft through the long hole, wherein the resistance link is connected with the linkage
  • the hinge axis between the pieces is radially offset from the hinge axis of the resistive link and the arm.
  • the transmission member has a triangular shape, and the two hinge points and the rotation axis are respectively distributed at three vertices of the triangle.
  • a corner limiting structure for preventing the switching shaft from overturning is disposed between the arm and the switch shaft.
  • the side of the dial switch remote from the rotating shaft has a curved edge.
  • the curved edge is tangent to the bottom of the notch on the switch shaft, and the arm and the switch shaft are further provided for A reset torsion spring that drives the switch shaft to reset when the dial switch is reset.
  • the circuit breaker adopts the following technical solution: a circuit breaker including an arc extinguishing chamber contact, a closing resistor contact and a tripping mechanism, the tripping mechanism comprising a mechanism box, wherein the transmission box is equipped with a transmission component through a rotating shaft, the transmission The component is provided with a hinge point for driving connection with the arc chamber contact and a hinge point for driving connection with the operating mechanism.
  • the hinge axes of the two hinge points are parallel to the rotating shaft; the rotating shaft is also equipped with a turning arm and a dial a switch, the arm is rotatably engaged with the rotating shaft, and a switch shaft is rotatably mounted between the two ends thereof.
  • the switch shaft and the rotating shaft are parallel to each other and a radial gap is provided on the outer peripheral surface for giving way to the dial switch.
  • the end of the arm remote from the rotating shaft is also hinged with a resistance connecting rod for driving and closing the closing resistance contact, and a linkage connecting member is arranged between the resistance connecting rod and the switching shaft; in the process of closing the circuit breaker, the rotating shaft follows The transmission component rotates and toggles the switch shaft through the dial switch to drive the arm to swing around the rotating shaft.
  • the linkage connecting member drives the switch shaft to rotate during the swinging of the arm.
  • One end of the switch shaft is provided with an eccentric pin handle, and the linkage connecting member is strip-shaped, one end of which is hinged on the resistance link, and the other end is hung on the pin handle of the switch shaft through the long hole, wherein the resistance link is connected with the linkage
  • the hinge axis between the pieces is radially offset from the hinge axis of the resistive link and the arm.
  • the transmission member has a triangular shape, and the two hinge points and the rotation axis are respectively distributed at three vertices of the triangle.
  • a corner limiting structure for preventing the switching shaft from overturning is disposed between the arm and the switch shaft.
  • the side of the dial switch remote from the rotating shaft has a curved edge.
  • the curved edge is tangent to the bottom of the notch on the switch shaft, and the arm and the switch shaft are further provided for A reset torsion spring that drives the switch shaft to reset when the dial switch is reset.
  • the rotating shaft of the circuit breaker closing resistor tripping mechanism is equipped with a crank arm and a paddle switch, the arm and the rotating shaft rotate Cooperating, the switch shaft is arranged to rotate between the two ends thereof, the switch shaft and the rotating shaft are parallel to each other, and a radial notch for giving way to the dial switch is provided on the outer peripheral surface, and a resistance gap is arranged between the resistance link and the switch shaft.
  • Linkage connecting member in the process of closing the circuit breaker, the rotating shaft rotates with the transmission component and drives the switch shaft through the dial switch to drive the arm to swing around the rotating shaft, and the linkage connecting member drives the switch shaft to rotate during the swinging of the arm.
  • the notch on the switch shaft is facing the dial switch, which resets and drives the closing resistor to open, thus ensuring that the arm will drive the closing resistor when the circuit breaker is closed.
  • the resetting realizes the automatic cutting off of the closing resistor after the switch of the arc extinguishing chamber of the circuit breaker is closed.
  • FIG. 1 is a schematic structural view of an embodiment of a circuit breaker closing resistor tripping mechanism
  • Figure 2 is a cross-sectional view taken along line C-C of Figure 1;
  • FIG. 3 is a front elevational view of the switch shaft of Figure 2;
  • Figure 4 is a right side view of the switch shaft of Figure 2;
  • FIG. 5 is a schematic view showing an initial state of an embodiment of a circuit breaker closing resistor tripping mechanism
  • FIG. 6 is a schematic view showing a state in which the circuit breaker closing resistance tripping mechanism is in an instant when the circuit breaker is closed;
  • Fig. 7 is a schematic structural view of an embodiment of a circuit breaker.
  • the circuit breaker closing resistor tripping mechanism includes a mechanism box 11 in which the transmission component 13 is rotatably mounted by the rotating shaft 12,
  • the transmission member 13 is specifically a triangular frame structure, which is screw-fitted with the rotating shaft 12 at one of the vertices of the formed triangle, and forms a hinge point at the other two vertices of the triangle.
  • the hinge axes of the hinge points are parallel to the rotating shaft 12, wherein one hinge point is hinged with the operating mechanism connecting plate 14, the other hinge point is hinged with the arc extinguishing chamber connecting plate 15, and the operating mechanism connecting plate 14 is used for the circuit breaker
  • the operating mechanism transmission connection, the arc extinguishing chamber connecting rod 15 is used for driving connection with the arc-breaking chamber moving contact of the circuit breaker to control the opening and closing of the arc-extinguishing chamber contact of the circuit breaker.
  • the rotating shaft 12 is further equipped with a rotating arm 16 and a paddle switch 17.
  • the rotating arm 16 is rotatably fitted on the rotating shaft 12 with one end of the rotating shaft 12, and the other end is hingedly connected with a resistance connecting rod 18, and the resistance connecting rod 18 is used for
  • the moving contact of the closing resistor is connected to drive, so as to drive the closing resistor to close and close, and the hinge axis of the arm 16 is parallel to the rotating shaft 12; in addition, the switch shaft 19 is further rotatably mounted between the two ends of the arm 16
  • the outer peripheral surface of the switch shaft 19 is provided with a notch 191.
  • the notch 191 forms a half-shaft structure at the corresponding position of the switch shaft 19.
  • the dial switch 17 is non-rotatingly mounted on the rotating shaft 12.
  • the dial switch 17 When the rotating shaft 12 rotates, the dial switch 17 The axis of the rotating shaft 12 is swung by the axis of the rotating shaft 12, and the end of the dial switch 17 away from the rotating shaft 12 has an arc-shaped edge.
  • the curved edge has a circular arc shape and the center of the circle is located on the axis of the rotating shaft 12, when facing away from the axis
  • the dial switch 17 can toggle the switch shaft 19 and rotate the arm during the swinging of the rotary shaft 12. 16 swings about the rotating shaft.
  • the notch 191 is put in place by the dial switch 17, and the dial switch 17 does not provide the driving force to the switch shaft 19.
  • a pin handle 20 is further disposed on one end surface of the switch shaft 19, and the pin handle 20 is in an eccentric arrangement.
  • a linkage connector 21 is further disposed between the switch shaft 19 and the resistance link 18.
  • the linkage connector 21 is a strip-shaped plate member, one end of which is hinged to the resistance link 18, and the other end is An elongated hole is provided and is hung on the pin handle 20 of the switch shaft 19 through the long hole, wherein the hinge axis between the link connector 21 and the resistance link 18 is radially offset from the hinge between the arm 16 and the resistance link 18. The axis, thereby causing the linkage 16 to pull the pin 20 of the switch shaft 19 and the rotation of the switch shaft 19 as the arm 16 rotates about the axis of rotation and urges the resistive link 18 to move.
  • a corner limiting structure for preventing the switching shaft 19 from over-rotating is disposed between the arm 16 and the switch shaft 19.
  • the corner limiting structure includes a turntable disposed at one end of the switch handle and rotating with the switch handle. a stop post disposed on the arm, wherein a gap is provided on the edge of the turntable, and the stop post is located in the gap, thereby causing the switch shaft 19 to rotate only within a set range, thereby avoiding the closing resistance The problem that the gate exceeds the set position.
  • a reset torsion spring 22 is further disposed between the arm 16 and the switch shaft 19.
  • the above-mentioned corner limit structure can also assist the switch shaft to return to the setting. The location.
  • the corresponding operating mechanism is driven by the operating mechanism to rotate the transmission component around the rotating shaft, so that the arc extinguishing chamber can push the circuit breaker
  • the movable contact of the arc extinguishing chamber approaches the static contact of the arc extinguishing chamber, and at the same time, the dial switch pivots the switch shaft so that the arm swings around the rotating shaft and drives the moving end of the closing resistor to the static end through the resistance link.
  • the pin handle on the switch shaft can also be omitted.
  • one end of the linkage connector can be fixed to the switch shaft, and the other end can pass through the long hole and the corresponding pin.
  • the shaft can be hung on the resistance link.
  • the circuit breaker includes an arc extinguishing chamber contact, a closing resistor contact, and a trip mechanism.
  • the arc extinguishing chamber contact and the closing resistor contact are both prior art and will not be described here; the structure of the tripping mechanism and the above disconnection
  • the embodiment of the device closing resistor tripping mechanism has the same structure and will not be described herein.

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

Abstract

一种断路器合闸电阻脱扣机构及使用该机构的断路器。脱扣机构包括机构箱（11），机构箱中通过转轴（12）转动装配有传动部件（13），传动部件（13）上设有两个铰点，两铰点的铰接轴线均与转轴（12）平行；转轴（12）上还装配有拐臂（16）和拨板开关（17），拐臂（16）与转轴（12）转动配合，其两端之间转动装配有开关轴（19），开关轴（19）与转轴（12）互相平行且于外周面上设有用于对拨板开关（17）让位的、径向的缺口（191），拐臂（16）的远离转轴（12）的一端还铰接有用于与驱使合闸电阻通断的电阻连杆（18），电阻连杆（18）与开关轴（19）之间设有联动连接件（21）；当断路器合闸到位时，开关轴（19）上的缺口（191）正对拨板开关（17），因此可保证当断路器合闸到位时，拐臂（16）便带动合闸电阻复位，实现了断路器灭弧室触头合闸后对合闸电阻的自动切断。

Description

断路器合闸电阻脱扣机构及使用该机构的断路器 技术领域
本发明涉及断路器领域，特别是涉及到一种断路器合闸电阻脱扣机构及使用该机构的断路器。
背景技术
在超高压电网中，断路器合空载长线，尤其是在电源电压幅值与线路残压反相时合闸，由于线路参数的突变，电网上电磁能量的振荡会引起较大的过电压。为了限制这种合闸过电压，常利用合闸电阻将电网中的部分电能吸收转化成热能，以达到削弱电磁振荡，限制过电压的目的。
受电阻元件热容量的限制，电阻元件的通流持续时间必须很短。因此，断路器实际运行时，要求电阻触头应提前灭弧室触头先合闸，经过时间Δt后，灭弧室触头再合闸。由于以上原因，并联电阻合闸接入时允许的通电时间很短，合闸操作时，传动机构应保证电阻断口先于主断口接通，随后在主断口接通后，电阻断口有二种工作方式。一是立即分开使电阻元件退出运行，这种方法的优点是，合闸操作后电阻元件处在分闸位置可靠性高，在分闸操作时电阻触头不动作，分闸时的操作功小。二是被主断口短接后保持在合闸位置，在进行分闸操作时应保证电阻断口先于主断口分闸，将开断电流转移至主触头，由灭弧室进行开断，在分闸操作时电阻触头同时动作，分闸时的操作功较大。
通过以上分析可知，上述第一种方式显然更具优势。而若要合闸电阻以上述第一种方式工作，就需要用到相应的脱扣机构。
发明内容
本发明的目的在于提供一种能够在断路器灭弧室触头合闸后自动将合闸电阻切断的断路器合闸电阻脱扣机构。
同时，本发明的目的还在于提供使用上述脱扣机构的断路器。
为了解决上述问题，断路器合闸电阻脱扣机构采用以下技术方案：断路器合闸电阻脱扣机构，包括机构箱，机构箱中通过转轴转动装配有传动部件，所述传动部件上设有两个铰点，该两铰点的铰接轴线均与转轴平行；转轴上还装配有拐臂和拨板开关，所述拐臂与转轴转动配合，其两端之间转动装配有开关轴，开关轴与转轴互相平行且于外周面上设有用于对拨板开关让位的、径向的缺口，拐臂的远离转轴的一端还铰接有用于与驱使合闸电阻通断的电阻连杆，电阻连杆与开关轴之间设有联动连接件；在断路器合闸的过程中，转轴随传动 部件转动并通过拨板开关拨动开关轴来驱使拐臂绕转轴摆动，联动连接件在拐臂摆动的过程中带动开关轴转动，当断路器合闸到位时，开关轴上的缺口正对拨板开关，所述拐臂复位并驱使合闸电阻断开。
开关轴的一端设有偏心的销柄，所述联动连接件呈条状，其一端铰接在电阻连杆上，另一端通过长孔挂在开关轴的销柄上，其中电阻连杆与联动连接件之间的铰接轴线径向偏离电阻连杆与拐臂的铰接轴线。
所述传动部件呈三角形，所述两铰点以及转轴分别分布在三角形的三个顶点处。
所述拐臂和开关轴之间设有用于防止开关轴过转的转角限位结构。
所述拨板开关的远离转轴的一侧具有弧形边缘，当断路器合闸到位时，该弧形边缘与开关轴上的缺口的底部相切，拐臂与开关轴之间还设有用于在拨板开关复位时驱使开关轴复位的复位扭簧。
断路器采用以下技术方案：断路器，包括灭弧室触头、合闸电阻触头和脱扣机构，所述脱扣机构包括机构箱，机构箱中通过转轴转动装配有传动部件，所述传动部件上设有与灭弧室触头传动连接的铰点和用于与操动机构传动连接的铰点，上述两铰点的铰接轴线均与转轴平行；转轴上还装配有拐臂和拨板开关，所述拐臂与转轴转动配合，其两端之间转动装配有开关轴，开关轴与转轴互相平行且于外周面上设有用于对拨板开关让位的、径向的缺口，拐臂的远离转轴的一端还铰接有用于与驱使合闸电阻触头分合闸的电阻连杆，电阻连杆与开关轴之间设有联动连接件；在断路器合闸的过程中，转轴随传动部件转动并通过拨板开关拨动开关轴来驱使拐臂绕转轴摆动，联动连接件在拐臂摆动的过程中带动开关轴转动，当断路器合闸到位时，开关轴上的缺口正对拨板开关，所述拐臂复位并驱使合闸电阻触头分闸。
开关轴的一端设有偏心的销柄，所述联动连接件呈条状，其一端铰接在电阻连杆上，另一端通过长孔挂在开关轴的销柄上，其中电阻连杆与联动连接件之间的铰接轴线径向偏离电阻连杆与拐臂的铰接轴线。
所述传动部件呈三角形，所述两铰点以及转轴分别分布在三角形的三个顶点处。
所述拐臂和开关轴之间设有用于防止开关轴过转的转角限位结构。
所述拨板开关的远离转轴的一侧具有弧形边缘，当断路器合闸到位时，该弧形边缘与开关轴上的缺口的底部相切，拐臂与开关轴之间还设有用于在拨板开关复位时驱使开关轴复位的复位扭簧。
由于该断路器合闸电阻脱扣机构的转轴上装配有拐臂和拨板开关，拐臂与转轴转动 配合，其两端之间转动装配有开关轴，开关轴与转轴互相平行且于外周面上设有用于对拨板开关让位的、径向的缺口，电阻连杆与开关轴之间设有联动连接件；在断路器合闸的过程中，转轴随传动部件转动并通过拨板开关拨动开关轴来驱使拐臂绕转轴摆动，联动连接件在拐臂摆动的过程中带动开关轴转动，当断路器合闸到位时，开关轴上的缺口正对拨板开关，所述拐臂复位并驱使合闸电阻断开，因此可保证当断路器合闸到位时，拐臂便带动合闸电阻复位，实现了断路器灭弧室触头合闸后对合闸电阻的自动切断。
附图说明
图1是断路器合闸电阻脱扣机构的实施例的结构示意图；
图2是图1的C-C剖视图；
图3是图2中的开关轴的主视图；
图4是图2中的开关轴的右视图；
图5是断路器合闸电阻脱扣机构的实施例在初始状态示意图；
图6是断路器合闸电阻脱扣机构的实施例在断路器合闸到位瞬间的状态示意图；
图7是断路器的实施例的结构示意图。
具体实施方式
断路器合闸电阻脱扣机构的实施例，如图1-6所示，该断路器合闸电阻脱扣机构包括机构箱11，机构箱11中通过转轴12转动装配有传动部件13，在本实施例中，传动部件13具体呈为三角形的框架式结构，其在所形成三角形的其中一个顶点处与转轴12止旋配合，在三角形的另外两个顶点处则形分别形成了铰点，两个铰点的铰接轴线均与转轴12互相平行，其中一个铰点铰接有操动机构连扳14，另一个铰点铰接有灭弧室连扳15，操动机构连扳14用于与断路器的操动机构传动连接，灭弧室连扳15用于与断路器灭弧室动触头传动连接以控制断路器的灭弧室触头的分合闸。
转轴12上还装配有拐臂16和拨板开关17，拐臂16通过一端空套在转轴12上与转轴12转动配合，其另一端铰接连接有电阻连杆18，电阻连杆18用于与合闸电阻的动触头传动连接，从而带动合闸电阻分合闸，其与拐臂16的铰接轴线平行于转轴12；另外，拐臂16的两端之间还转动装配有开关轴19，开关轴19的外周面上设有缺口191，缺口191使得开关轴19在相应位置处形成了半轴结构，拨板开关17止旋装配在转轴12上，当转轴12转动时，拨板开关17以转轴12的轴线为转动轴线摆动，拨板开关17的远离转轴12的一端具有一个弧形边缘，本实施例中该弧形边缘呈圆弧形并且圆心位于转轴12的轴线上，当背向开关轴19上的缺口时，拨板开关17可在随转轴12摆动的过程中拨动开关轴19并使拐臂 16绕转轴摆动，当面向开关轴19上的缺口191时，则缺口191为拨板开关17让位，拨板开关17不向开关轴19提供拨动力。开关轴19的一端端面上还设有销柄20，销柄20采用偏心设置形式。
开关轴19与电阻连杆18之间还设有联动连接件21，在本实施例中，联动连接件21采用的是条状的板件，其一端铰接在电阻连杆18上，另一端处设有长孔并且通过长孔挂在开关轴19的销柄20上，其中联动连接件21与电阻连杆18之间的铰接轴线沿径向偏离拐臂16与电阻连杆18之间的铰接轴线，由此使得当拐臂16绕转轴转动并且驱使电阻连杆18运动时，联动连接件21将拉动开关轴19的销柄20并带动开关轴19转动。
另外，拐臂16和开关轴19之间设有用于防止开关轴19过转的转角限位结构，本实施例中，转角限位结构包括设于开关柄一端的、随开关柄转动的转盘和设于拐臂上的挡柱，其中转盘的边缘上设有一个豁口，挡柱便位于该豁口中，由此使得开关轴19仅能在设定的范围内转动，从而可避免合闸电阻合闸超过设定位置的问题。
为了能使开关轴在断路器分闸后能够回到初始位置，拐臂16与开关轴19之间还设有复位扭簧22，上述的转角限位结构同时也可辅助开关轴回到设定的位置处。
在使用该断路器合闸电阻脱扣机构的过程中，当断路器合闸时，相应的操动机构通过操动机构连扳驱使传动部件绕转轴转动，从而使得灭弧室连扳可推动断路器灭弧室动触头向灭弧室静触头靠近，与此同时，拨板开关通过拨动开关轴使得拐臂绕转轴摆动并通过电阻连杆驱使合闸电阻的动端向静端移动，在此过程中，断路器灭弧室动触头和合闸电阻动端的运动是同步的，因此仅需控制二者相应的断口开距即可控制它们的合闸顺序及合闸相差时间，当断路器灭弧室动触头合闸到位时，由于联动连接件的作用，开关轴发生了转动，从而使得开关轴上的缺口正对开关拨板的圆弧形边缘，此时拨板开关上的圆弧形边缘与缺口的底部相切，拨板开关不再有力作用于开关轴及拐臂，因此拐臂在合闸电阻动端弹簧23(合闸电阻自带)的作用下复位，从而便可实现对合闸电阻回路的切断。当断路器分闸时，传动部件以及拨板开关均复位，则此时拨杆开关对开关轴的干涉消失，开关轴在复位扭簧的作用下自动复位，以便下一个工作循环的进行。
在断路器合闸电阻脱扣机构的其它实施例中，开关轴上的销柄还可以省略，此种情况下，可将联动连接件一端与开关轴固定，另一端通过长孔和相应的销轴挂在电阻连杆上即可。
断路器的实施例，如图7所示，该断路器包括灭弧室触头、合闸电阻触头和脱扣机构。灭弧室触头和合闸电阻触头均为现有技术，此处不予赘述；脱扣机构的结构与上述断路 器合闸电阻脱扣机构的实施例结构相同，此处不予赘述。

Claims (10)

  1. 断路器合闸电阻脱扣机构，其特征在于，包括机构箱，机构箱中通过转轴转动装配有传动部件，所述传动部件上设有两个铰点，该两铰点的铰接轴线均与转轴平行；转轴上还装配有拐臂和拨板开关，所述拐臂与转轴转动配合，其两端之间转动装配有开关轴，开关轴与转轴互相平行且于外周面上设有用于对拨板开关让位的、径向的缺口，拐臂的远离转轴的一端还铰接有用于与驱使合闸电阻通断的电阻连杆，电阻连杆与开关轴之间设有联动连接件；在断路器合闸的过程中，转轴随传动部件转动并通过拨板开关拨动开关轴来驱使拐臂绕转轴摆动，联动连接件在拐臂摆动的过程中带动开关轴转动，当断路器合闸到位时，开关轴上的缺口正对拨板开关，所述拐臂复位并驱使合闸电阻断开。
  2. 根据权利要求1所述的断路器合闸电阻脱扣机构，其特征在于，开关轴的一端设有偏心的销柄，所述联动连接件呈条状，其一端铰接在电阻连杆上，另一端通过长孔挂在开关轴的销柄上，其中电阻连杆与联动连接件之间的铰接轴线径向偏离电阻连杆与拐臂的铰接轴线。
  3. 根据权利要求1所述的断路器合闸电阻脱扣机构，其特征在于，所述传动部件呈三角形，所述两铰点以及转轴分别分布在三角形的三个顶点处。
  4. 根据权利要求1-3任一项所述的断路器合闸电阻脱扣机构，其特征在于，所述拐臂和开关轴之间设有用于防止开关轴过转的转角限位结构。
  5. 根据权利要求4所述的断路器合闸电阻脱扣机构，其特征在于，所述拨板开关的远离转轴的一侧具有弧形边缘，当断路器合闸到位时，该弧形边缘与开关轴上的缺口的底部相切，拐臂与开关轴之间还设有用于在拨板开关复位时驱使开关轴复位的复位扭簧。
  6. 断路器，包括灭弧室触头、合闸电阻触头和脱扣机构，其特征在于，所述脱扣机构包括机构箱，机构箱中通过转轴转动装配有传动部件，所述传动部件上设有与灭弧室触头传动连接的铰点和用于与操动机构传动连接的铰点，上述两铰点的铰接轴线均与转轴平行；转轴上还装配有拐臂和拨板开关，所述拐臂与转轴转动配合，其两端之间转动装配有开关轴，开关轴与转轴互相平行且于外周面上设有用于对拨板开关让位的、径向的缺口，拐臂的远离转轴的一端还铰接有用于与驱使合闸电阻触头分合闸的电阻连杆，电阻连杆与开关轴之间设有联动连接件；在断路器合闸的过程中，转轴随传动部件转动并通过拨板开关拨动开关轴来驱使 拐臂绕转轴摆动，联动连接件在拐臂摆动的过程中带动开关轴转动，当断路器合闸到位时，开关轴上的缺口正对拨板开关，所述拐臂复位并驱使合闸电阻触头分闸。
  7. 根据权利要求6所述的断路器，其特征在于，开关轴的一端设有偏心的销柄，所述联动连接件呈条状，其一端铰接在电阻连杆上，另一端通过长孔挂在开关轴的销柄上，其中电阻连杆与联动连接件之间的铰接轴线径向偏离电阻连杆与拐臂的铰接轴线。
  8. 根据权利要求6所述的断路器，其特征在于，所述传动部件呈三角形，所述两铰点以及转轴分别分布在三角形的三个顶点处。
  9. 根据权利要求6-8任一项所述的断路器，其特征在于，所述拐臂和开关轴之间设有用于防止开关轴过转的转角限位结构。
  10. 根据权利要求9所述的断路器，其特征在于，所述拨板开关的远离转轴的一侧具有弧形边缘，当断路器合闸到位时，该弧形边缘与开关轴上的缺口的底部相切，拐臂与开关轴之间还设有用于在拨板开关复位时驱使开关轴复位的复位扭簧。
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