WO2017092655A1 - 一种双断口真空断路器 - Google Patents

一种双断口真空断路器 Download PDF

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Publication number
WO2017092655A1
WO2017092655A1 PCT/CN2016/107750 CN2016107750W WO2017092655A1 WO 2017092655 A1 WO2017092655 A1 WO 2017092655A1 CN 2016107750 W CN2016107750 W CN 2016107750W WO 2017092655 A1 WO2017092655 A1 WO 2017092655A1
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WIPO (PCT)
Prior art keywords
transmission
plate
overtravel
circuit breaker
rod
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Ceased
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PCT/CN2016/107750
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English (en)
French (fr)
Inventor
卢留洋
王刚
袁端磊
王海燕
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Pinggao Group Co Ltd
State Grid Corp of China SGCC
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Pinggao Group Co Ltd
State Grid Corp of China SGCC
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Publication of WO2017092655A1 publication Critical patent/WO2017092655A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements

Definitions

  • the invention relates to the field of circuit breaker manufacturing, and in particular to a double-break vacuum circuit breaker.
  • the most practical and economical way to perform reactive power compensation is to install a shunt capacitor bank.
  • the performance of the switching capacitor bank is critical to the successful completion of the task.
  • the re-ignition rate is: when the circuit breaker is turned on, the contact will generate an arc between the contacts at the moment of breaking, and the arc needs a relatively high voltage, while the existence of the arc requires a relatively low voltage. The arc is often extinguished when the current crosses zero.
  • the research on the vacuum capacitor breaker switching capacitors at home and abroad mainly focuses on the mechanism of the inrush current and heavy breakdown and its influencing factors as well as the life evaluation of the vacuum circuit breaker in capacitive breaking.
  • the influence of the contact material and the contact type on the capacitive breaking performance of the vacuum circuit breaker is studied; the influence of the inrush current energy and the breakdown time on the life of the circuit breaker, and the circuit breaker is capacitively opened.
  • the phenomenon of non-self-sustaining destructive discharge during the breaking process and the influence of the presence or absence of neutral grounding of the capacitor have been studied; the increase of the inrush current will result in the field after the breaking.
  • the emission current will increase, and the relationship between field emission current and heavy breakdown will be studied.
  • the above studies still fail to solve the problem of reignition when the vacuum switch is switched to the capacitor bank, and further research is still needed.
  • a double-break vacuum switching switch wherein one pole, including an operating box, two vacuum interrupters, two closing springs, two linear positioning members, and an opening buffer positioning Rod, pillar porcelain sleeve, drive system tie rod, operating mechanism.
  • the two movable end conductive rods of the vacuum interrupter are on the same line as the center line of the moving rod members of the two linear positioning members, and the ends thereof are coaxially connected to each other and slidable.
  • the other end of the moving rod in the linear positioning member is respectively connected with the two rotating arms of the top rod of the transmission system rod.
  • the moving rod drives the movable end conductive rod to separate the two vacuum interrupters. Brake operation.
  • the linear moving member in the switch has no guiding means, and it is difficult to ensure that the two linear positioning members move on the same line during the opening and closing process.
  • the insulating pull rod drives the two arm, it is also difficult to ensure that the two armes connected to the insulating rod act simultaneously, thereby affecting the simultaneous breaking of the two arc extinguishing chambers.
  • the object of the embodiments of the present invention is to provide a double-break vacuum circuit breaker to solve the technical problem that the two double-break circuit breakers cannot ensure that the two arc extinguishing chambers simultaneously break.
  • a technical solution of a double-break vacuum circuit breaker is as follows: a double-break vacuum circuit breaker includes an insulating tie rod, an upper arc extinguishing chamber disposed above and below, a lower arc extinguishing chamber, an upper arc extinguishing chamber, and a lower extinguishing chamber.
  • a transmission box is disposed between the arc chambers, and the transmission box is provided with three linkage devices, and the three linkage devices include an upper transmission plate and a lower transmission plate, and the left end of the upper transmission plate and the left end of the lower transmission plate pass the first hinge
  • the shaft is hinged together, the insulating rod extends in the left-right direction, the right end of the insulating rod is connected to the first hinge shaft, and the movable end of the upper arc chamber is provided with an upper conductive member, and the lower arc chamber is moved.
  • the end is provided with a lower moving conductive member, and the upper movable conductive member passes through the upper hinge shaft Attached to the right end of the upper drive plate, the lower movable member is hingedly connected to the right end of the lower drive plate via a lower hinge shaft, and the transmission case is provided with an upper guide slot for guiding the upper hinge shaft up and down,
  • the lower hinge shaft is vertically guided to guide the lower guide slot, and the transmission box is further provided with a first guide slot for guiding the first hinge shaft to move in the left and right direction.
  • the triple linkage device further includes a first intermediate transmission plate, a second intermediate transmission plate, a left end of the first intermediate transmission plate is hinged on the upper transmission plate, and a left end of the second intermediate transmission plate is hinged on the lower transmission plate
  • the right end of the first intermediate transmission plate and the right end of the second intermediate transmission plate are hingedly connected by the second hinge shaft.
  • the second hinge shaft is disposed on the transmission case in the front-rear direction.
  • the hinge axis of the first intermediate transmission plate and the upper transmission plate is at one-half of the length direction of the upper transmission plate, and the hinge axes of the second intermediate transmission plate and the lower transmission plate are in the longitudinal direction of the lower transmission plate. One-half.
  • the transmission box comprises a left box plate, a front box plate and a rear box plate, and the upper guiding long groove, the lower guiding long groove and the first guiding long groove are two arranged front and rear and respectively located on the front box plate and the rear Box board.
  • the left box plate, the front box plate and the rear box plate are arranged to be open to the right, and the upper guiding long groove and the lower guiding long groove are upper guiding long holes and lower guiding long holes which are arranged through the front and the back.
  • the front box panel is provided with an upper retracting slot that communicates with the opening to the right and communicates with the upper guiding slot, and the front panel is further provided with a lower opening that communicates with the lower guiding slot groove.
  • the upper movable member includes an upper conductive rod and an upper overtravel device
  • the upper overtravel device includes an upper overtravel device body and an upper transmission rod that is vertically inserted into the upper overtravel device body, and the upper transmission rod
  • An upper overtravel spring is disposed between the main body of the upper overtravel device and the upper movable conductive rod, the upper overtravel device body and the upper drive plate Hinged.
  • the upper overtravel device body has an upper receiving cavity with an opening upward, the upper transmission rod is an upper adjusting screw, and the upper overtravel spring is sleeved on the upper adjusting screw, and the upper adjusting screw is provided with a pair
  • the upper overtravel spring performs an upper limit position of the upper and lower limit positions, and the upper adjustment screw is provided with an upper lock nut above the upper limit position.
  • the lower movable member includes a lower moving rod and a lower overtravel device
  • the lower overtravel device includes a lower overtravel device body and a lower transmission rod that is inserted up and down in the lower overtravel device body, and the lower transmission rod a lower overtravel spring is disposed between the lower overtravel device body, and a lower end of the lower transmission lever outside the body of the lower overtravel device is connected to the lower moving conductive rod, and the lower overtravel device body and the lower drive plate Hinged.
  • the lower overtravel device body has a lower receiving cavity with an opening downward, the lower transmission rod is a lower adjusting screw, the lower overtravel spring is sleeved on a lower adjusting screw, and the lower adjusting screw is provided with a lower super
  • the process spring performs a lower limit position of the upper and lower limit positions, and a lower lock nut is disposed below the lower limit position.
  • the double-break vacuum circuit breaker of the embodiment of the present invention includes a triple linkage device, wherein the left end of the upper transmission plate of the triple linkage device and the left end of the lower transmission plate are hinged together through the first hinge shaft, and the insulation rod Extending in the left-right direction, the right end of the insulating pull rod is connected to the first hinge shaft, and the movable end of the upper arc extinguishing chamber is provided with an upper moving conductive member, and the movable end of the lower arc extinguishing chamber is provided with a lower moving conductive member, and the upper conductive portion is electrically conductive.
  • the piece is hingedly connected to the right end of the upper drive plate through the upper hinge shaft, and the lower movable member is hingedly connected to the right end of the lower drive plate through the lower hinge shaft.
  • the transmission box is provided with an upper guiding long slot for guiding the upper hinge shaft up and down, and a lower guiding long slot for guiding the lower hinge shaft up and down, and the transmission box is further provided with a movement guiding the first hinge shaft in the left and right direction. A guide to the long slot.
  • the constraint on the upper and lower transmission plates is increased, the freedom of movement is reduced, the movement of the upper and lower transmission plates is more precise, and the synchronization of the movement is improved. Sex, to ensure that the upper and lower arc chamber can achieve simultaneous breaking.
  • FIG. 1 is a schematic structural view of a single pole assembly in an embodiment of the inventive double-break vacuum circuit breaker
  • Figure 2 is a partial structural view of Figure 1;
  • Figure 3 is a schematic structural view of the transmission case of Figure 1;
  • Figure 4 is a schematic structural view of the triple linkage device of Figure 3;
  • Figure 5 is a plan view of Figure 4.
  • Figure 6 is a schematic structural view of the overtravel device of Figure 4.
  • Figure 7 is a schematic view showing the structure of the transmission case body of Figure 3.
  • Embodiment of the double-break vacuum circuit breaker of the present invention As shown in FIG. 1-7, the double-break vacuum circuit breaker is divided into a body part and an operating mechanism part, and adopts a front and a rear arrangement manner.
  • the body portion mainly comprises an insulating pillar 1, a vacuum interrupter, an upper contact arm 4, a lower contact arm, a plum contact 5 and a transmission case 10.
  • the operating mechanism is partially located in the body breaker trolley and transmits the force to the vacuum interrupter through the insulating tie rod 11.
  • the vacuum interrupter includes an upper arc extinguishing chamber 3 and a lower arc extinguishing chamber 8 disposed above and below, and a transmission case 10 is disposed between the upper arc extinguishing chamber 3 and the lower arc extinguishing chamber 8.
  • An upper wiring board 2 is disposed above the upper arc extinguishing chamber 3, and the upper contact arm 4 is connected to the upper wiring board 2.
  • a voltage equalizing capacitor 6 is disposed between the upper wiring board 2 and the transmission case 10.
  • the lower arc extinguishing chamber 8 is disposed to be supported on the insulating post with a lower connecting plate 9 therebetween, and the lower contact arm 12 is connected to the lower wiring plate 9.
  • a voltage equalizing capacitor is also provided between the lower terminal block 9 and the transmission case 10.
  • the transmission box 10 is provided with a triple linkage device.
  • the triple linkage device includes an upper transmission plate 17 and a lower transmission plate 18.
  • the left end of the upper transmission plate 17 and the left end of the lower transmission plate 18 are hinged together through the first hinge shaft, and the insulating pull rod 11 is adjacent to the left and right.
  • the direction is extended, the right end of the insulating rod 11 is connected to the first hinge shaft, the movable end of the upper arc extinguishing chamber 3 is provided with an upper moving conductive member, and the movable end of the lower arc extinguishing chamber 8 is provided with a lower moving conductive member, which is moved upward.
  • the conductive member is hingedly connected to the right end of the upper drive plate through the upper hinge shaft
  • the lower movable member is hingedly connected to the right end of the lower drive plate through the lower hinge shaft
  • the transmission box is provided with an upper guide long groove for guiding the upper hinge shaft up and down. 21.
  • the transmission case 10 is further provided with a first guiding slot 25 for guiding the first hinge shaft to move in the left-right direction.
  • the transmission box as a whole part includes a left box board, a front box board 28, a rear box board, an upper box board 26, a lower box board 27, a left box board, a front box board, a rear box board and the like, each of which The components (or each of the box plates) are enclosed in an installation space with an opening to the right, and the triple linkage can be installed from the right side of the transmission case during installation.
  • the upper guiding long groove 21, the lower guiding long groove 24, and the first guiding long groove 25 are both disposed front and rear and are respectively located on the front box plate 28 and the rear box plate.
  • the upper guiding long groove, the lower guiding long groove and the first guiding long groove on the front box or the back box are triangularly distributed.
  • the upper guide long groove 21 and the lower guide long groove 24 are upper guide long holes and lower guide long holes which are provided in front and rear.
  • the first guiding long groove is a first guiding long hole, and the first guiding long hole has two and is respectively located on the front box plate and the rear box plate.
  • the upper guiding long holes arranged before and after are formed at one time, and the lower guiding long holes and the first guiding long holes are also the same.
  • the front box panel in order to facilitate the installation of the triple linkage device, is provided with an upper retracting slot 22 with an opening to the right and a connecting upper guiding slot, and the front panel is also provided with an opening to the right.
  • the lower retaining groove 23 that communicates with the lower guiding elongated hole.
  • the triple linkage device further includes a first intermediate transmission plate 19 and a second intermediate transmission plate 20, and the left end of the first intermediate transmission plate 19 is hinged to the upper transmission plate. 17, the left end of the second intermediate transmission plate 20 is hinged to the lower transmission plate 18, and the right end of the first intermediate transmission plate 19 and the right end of the second intermediate transmission plate 20 are hingedly connected by the second hinge shaft 29.
  • the second hinge shaft 29 is disposed on the transmission case in the front-rear direction, and its two ends are respectively disposed on the front and rear box plates.
  • the hinge axis of the first intermediate drive plate 19 and the upper drive plate 17 is at one-half of the length direction of the upper drive plate 17, and the second intermediate drive plate 20 and the lower drive plate The hinge axis of the 18 is at one-half of the length of the lower drive plate 18.
  • the upper drive plate, the lower drive plate and the first and second intermediate drive plates are arranged in pairs before and after.
  • the upper movable member includes an upper conductive rod and an upper overtravel device 14, and the upper overtravel device includes an overtravel
  • the device body and the upper transmission rod 30 are inserted into the upper overtravel device body, and an upper overtravel spring 31 is disposed between the upper transmission rod and the upper overtravel device body, and the upper transmission rod is outside the upper overtravel device body.
  • the upper end is connected to the upper movable conductive rod, and the upper overtravel device body is hinged to the upper transmission plate.
  • the upper overtravel device body has an upper receiving cavity with an opening upward, the upper transmission rod is an upper adjusting screw, the upper overtravel spring is sleeved on the upper adjusting screw, and the upper adjusting screw is provided with an upper and lower limit position of the upper overtravel spring
  • the upper limit portion is provided with an upper lock nut 32 above the upper limit portion.
  • the upper overtravel device has an adjustment pad 33 at the bottom.
  • the overtravel device can act as a buffer during the opening process. In addition to the buffering function, the overtravel device can also provide the contact pressure of the static and dynamic contact in the vacuum interrupter during closing.
  • the lower moving conductive member comprises a lower moving conductive rod and a lower overtravel device 15
  • the lower overtravel device comprises a lower overtravel device body and a lower transmission rod inserted up and down in the lower overtravel device body, a lower transmission rod and a lower overtravel device
  • a lower overtravel spring is disposed between the bodies, and a lower end of the lower transmission rod outside the body of the lower overtravel device is connected with the lower moving conductive rod, and the lower overtravel device body is hinged with the lower transmission plate.
  • the lower overtravel device body has a lower receiving cavity with an opening downward, the lower transmission rod is a lower adjusting screw, the lower overtravel spring is sleeved on the lower adjusting screw, and the lower adjusting screw is provided with a lower limit of the upper and lower limits of the lower overtravel spring.
  • a lower locking nut is provided below the lower limit portion of the lower adjusting screw.
  • the lower overtravel device has an adjustment spacer at the top.
  • the lower overtravel device is identical in structure to the upper overtravel device and is not separately shown in the drawings.
  • the upper movable conductive rod and the lower movable conductive rod are electrically connected by a soft connection assembly, and the soft connection assembly includes a conductive block, an upper soft connection 7, and a lower soft connection 16.
  • the upper and lower soft connections are connected to the conductive blocks.
  • the gearbox is cast from cast aluminum silicon-magnesium alloy to ensure the strength of the gearbox.
  • the double-break circuit breaker adopts an I-shaped arrangement and has a compact structure. Both the insulating tie rod and the insulating support are cast from epoxy resin.
  • the main circuit of each pole is composed of plum contact ⁇ upper contact arm ⁇ upper bracket ⁇ upper arc extinguishing chamber ⁇ soft connection ⁇ lower arc extinguishing chamber ⁇ lower bracket ⁇ lower contact arm ⁇ plum contact.
  • the main circuit is fixed to the circuit breaker trolley by the upper and lower brackets through the insulating pillars.
  • Double-break vacuum circuit breaker separation process Double-break vacuum circuit breaker separation process:
  • Opening action The circuit breaker operating mechanism pulls the insulating rod to the left to drive the upper and lower transmission plates to close the movement.
  • the upper hinge shaft and the lower hinge shaft move toward each other at the same time.
  • the transmission plate drives the two arc extinguishing chambers to move at the same time. carry out.
  • Closing action The circuit breaker operating mechanism pushes the insulating rod to the right to drive the upper and lower transmission plates to move, and the upper hinge shaft and the lower hinge shaft move at the same time, and the transmission plate drives the two arc extinguishing chambers to simultaneously act.
  • the gate is completed.
  • the first hinge shaft moves left and right under the guiding action of the first guiding long hole, and the upper hinge shaft and the lower hinge shaft respectively move up and down under the guiding action of the upper guiding long hole and the lower guiding long hole.
  • the breaking capacity of the double fracture arrangement is more than twice the breaking capacity of the single fracture.
  • the other gap In the event of a breakdown in the first gap, the other gap often temporarily withstands the entire TRV without causing a final breakdown failure in both gaps.
  • higher voltage levels such as 40.5 kV, it is difficult for the circuit breaker to pass the capacitor breaking test.
  • each of the two arc extinguishing chambers has a separate heavy breakdown probability, and the breakdown probability is nonlinearly related to the contact stroke.
  • the contact opening distance is 2 ⁇ 14 mm
  • the insulation withstand voltage is increased by about 40% compared with the single opening distance of 28 mm.
  • the first arc extinguishing chamber facing the old refining is more resistant than before.
  • the vacuum gap is 1.6mm
  • one vacuum interrupter can only withstand a recovery voltage of 16kV; when the two vacuum interrupters are connected in series, the recovery voltage can withstand 51kV.
  • the vacuum gap is 2mm
  • a vacuum interrupter can only withstand a recovery voltage of 38kV, and two vacuum interrupters can withstand 100kV in series.
  • the double-break vacuum circuit breaker is superior to the single fracture in terms of insulation level, breaking capacity, and low probability of heavy breakdown.
  • the double-break interrupter series is used to solve the problem of high reignition probability of the vacuum circuit breaker switching capacitor group switch. The fundamental way.
  • the first hinged elongated hole is also a hinged long groove that does not pass through the front and rear, and is hinged
  • the long hole and the lower hinged long hole may not be front and rear through, or may be a blind long hole, that is, a guide groove.
  • the overtravel device may not be provided, and the upper drive plate is hingedly connected to the upper movable conductive rod through the upper transmission rod, and the lower transmission plate is hingedly connected to the lower movable conductive rod through the lower transmission rod.
  • the double-break vacuum circuit breaker of the embodiment of the invention includes a triple linkage device, wherein the left end of the upper transmission plate of the triple linkage device and the left end of the lower transmission plate are hinged together through the first hinge shaft, and the insulation pull rod is extended along the left-right direction, and the insulation is insulated.
  • the right end of the pull rod is connected to the first hinge shaft, and the movable end of the upper arc extinguishing chamber is provided with an upper moving conductive member, and the movable end of the lower arc extinguishing chamber is provided with a lower moving conductive member, and the upper moving conductive member passes through the upper hinge shaft and is uploaded.
  • the right end of the moving plate is hingedly connected, and the lower moving conductive member is hingedly connected to the right end of the lower driving plate through the lower hinge shaft.
  • the transmission box is provided with an upper guiding long slot for guiding the upper hinge shaft up and down, and a lower guiding long slot for guiding the lower hinge shaft up and down, and the transmission box is further provided with a movement guiding the first hinge shaft in the left and right direction. A guide to the long slot.
  • the constraint on the upper and lower transmission plates is increased, the freedom of movement is reduced, the movement of the upper and lower transmission plates is more precise, and the synchronization of the movement is improved. Sex, to ensure that the upper and lower arc chamber can achieve simultaneous breaking.

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

Abstract

一种双断口真空断路器，该断路器包括上下设置的上灭弧室（3）、下灭弧室（8）、传动箱（10），传动箱（10）内设有三联动装置，三联动装置包括上传动板（17）、下传动板（18），上传动板（17）的左端与下传动板（18）的左端通过第一铰接轴铰接，绝缘拉杆（11）的右端连接在第一铰接轴上，上灭弧室（3）的动端的上动导电件通过上铰接轴与上传动板（17）的右端铰接，下灭弧室（8）的动端的通过下铰接轴与下传动板（18）的右端铰接，传动箱（10）上设有用于对上铰接轴上下运动导向的上导向长槽（21）、对下铰接轴上下运动导向的下导向长槽（24）、对第一铰接轴左右运动导向的第一导向长槽（25）。

Description

一种双断口真空断路器 技术领域
本发明涉及断路器制造领域，尤其涉及一种双断口真空断路器。
背景技术
在12kV-40.5kV的系统中，进行无功功率补偿最实用、最经济的方法就是安装并联电容器组，而投切电容器组开关性能的优劣对能否成功完成任务至关重要。根据当前电网的运行经验，目前真空断路器在投切电容器组时的重燃概率依然居高不下。重燃率就是：断路器在分闸瞬间，触头在分断离开瞬间，在触头之间会产生电弧，产生电弧需要比较高的电压，而维持电弧的存在则需要比较低的电压即可，电弧往往在电流过零时就熄灭了。此时触头之间的介质绝缘强度如果大于触头间的电弧维持电压，电弧就熄灭了，否则触头间的介质绝缘强度小于触头间的电弧维持电压，则介质被击穿，电弧又重新燃烧。电弧的重燃产生的热量表较大，很容易造成断路器的损坏或在系统中产生过电压。由于电容器组开关的频繁操作，致使系统中故障频发，给电力设备带来严重的危害，同时也限制了真空断路器在这一方面的应用。因此创新一种全新的真空断路器来解决真空断路器投切电容器组重燃率高的问题，是电网安全运行所迫切需要解决的事情。
目前国内外对于真空断路器投切电容器的研究，主要关注合闸涌流、重击穿的产生机理及其影响因素以及容性开断中真空断路器的寿命评估。现有技术中，针对触头材料以及触头类型对于真空断路器容性开断性能的影响进行了研究；针对涌流能量以及与击穿时间对断路器寿命的影响，及断路器在容性开断过程中的非自持破坏性放电现象，以及电容器是否存在中性点接地的影响等进行了研究；针对涌流的增大会导致开断之后的场致 发射电流会随之增大，及场致发射电流与重击穿之间的关系等进行了研究。但是，以上研究仍然未能解决真空开关投切电容器组时重燃的问题，因此仍然需要进一步进行研究。
随着技术的发展，出现了双断口断路器，双断口布置的开断能力是单断口开断能力的2倍以上。现有技术中一种双断口真空投切开关，该投切开关，其中一个极柱，包括操作箱、两个真空灭弧室，两根合闸弹簧、两个直线定位件、分闸缓冲定位杆、支柱瓷套管、传动系统拉杆、操动机构。真空灭弧室的两个动端导电杆与两个直线定位件中的运动杆件的中心线在同一条直线上，其端头彼此分别同轴套连接，并可滑动。直线定位件中的运动杆件的另一端分别与传动系统拉杆顶端拉杆的两个拐臂相连，当拉杆上下运动时，运动杆件驱动动端导电杆，使两个真空灭弧室进行分合闸操作。但是该开关中的直线运动件没有导向的装置，在分合闸的过程中，很难保证两个直线定位件在同一直线上运动。而且绝缘拉杆在驱动两个拐臂时，也很难保证与绝缘拉杆连接的两个拐臂同时动作，进而影响两个灭弧室的同时开断。
发明内容
本发明实施例的目的是提供一种双断口真空断路器，以解决现有的双断口断路器中的不能保证两个灭弧室同时实现开断的技术问题。
为了实现以上目的，本发明实施例一种双断口真空断路器的技术方案如下：双断口真空断路器包括绝缘拉杆及上下设置的上灭弧室、下灭弧室，上灭弧室、下灭弧室之间设有传动箱，所述传动箱内设有三联动装置，所述三联动装置包括上传动板、下传动板，所述上传动板的左端与下传动板的左端通过第一铰接轴铰接在一起，所述绝缘拉杆沿左右方向延伸设置，所述绝缘拉杆的右端传动连接在第一铰接轴上，上灭弧室的动端设有上动导电件，下灭弧室的动端设有下动导电件，所述上动导电件通过上铰接轴 与上传动板的右端铰接连接，所述下动导电件通过下铰接轴与下传动板的右端铰接连接，所述传动箱上设有用于对上铰接轴上下运动导向的上导向长槽、对下铰接轴上下运动导向的下导向长槽，所述传动箱上还设有对第一铰接轴沿左右方向运动导向的第一导向长槽。
所述三联动装置还包括第一中间传动板、第二中间传动板，所述第一中间传动板左端铰接在所述上传动板上，所述第二中间传动板的左端铰接在下传动板上，第一中间传动板的右端与第二中间传动板的右端通过第二铰接轴铰接连接。
所述第二铰接轴沿前后方向设置在所述传动箱上。
所述第一中间传动板与上传动板的铰接轴线处于上传动板的长度方向的二分之一处，所述第二中间传动板与下传动板的铰接轴线处于下传动板的长度方向的二分之一处。
所述传动箱包括左箱板、前箱板、后箱板，所述上导向长槽、下导向长槽、第一导向长槽均是有前后设置的两个且分别位于前箱板、后箱板上。
所述左箱板、前箱板、后箱板围设成开口朝右的安装空间，所述上导向长槽、下导向长槽为前后贯穿设置的上导向长孔、下导向长孔，所述前箱板上设置有开口朝右的、连通所述上导向长孔的上让位槽，所述前箱板上还设置有开口朝右的、连通所述下导向长孔的下让位槽。
所述上动导电件包括上动导电杆及上超程装置，所述上超程装置包括上超程装置本体及上下插设于上超程装置本体内的上传动杆，所述上传动杆与上超程装置本体之间设有上超程弹簧，所述上传动杆的处于上超程装置本体外侧的上端与所述上动导电杆连接，上超程装置本体与所述上传动板铰接。
所述上超程装置本体具有开口朝上的上容纳腔，所述上传动杆为上调节螺杆，所述上超程弹簧套设在上调节螺杆上，所述上调节螺杆上设有对 上超程弹簧进行上下限位的上限位部，所述上调节螺杆的位于所述上限位部的上方设有上锁止螺母。
所述下动导电件包括下动导电杆及下超程装置，所述下超程装置包括下超程装置本体及上下插设于下超程装置本体内的下传动杆，所述下传动杆与下超程装置本体之间设有下超程弹簧，所述下传动杆的处于下超程装置本体外侧的下端与所述下动导电杆连接，下超程装置本体与所述下传动板铰接。
所述下超程装置本体具有开口朝下的下容纳腔，所述下传动杆为下调节螺杆，所述下超程弹簧套设在下调节螺杆上，所述下调节螺杆上设有对下超程弹簧进行上下限位的下限位部，所述下调节螺杆的位于所述下限位部的下方设有下锁止螺母。
本发明实施例的有益效果：本发明实施例双断口真空断路器中包括三联动装置，其中三联动装置的上传动板的左端与下传动板的左端通过第一铰接轴铰接在一起，绝缘拉杆沿左右方向延伸设置，绝缘拉杆的右端传动连接在第一铰接轴上，上灭弧室的动端设有上动导电件，下灭弧室的动端设有下动导电件，上动导电件通过上铰接轴与上传动板的右端铰接连接，下动导电件通过下铰接轴与下传动板的右端铰接连接。在现有的断路器基础上，增加对三联动装置导向的结构。传动箱上设有用于对上铰接轴上下运动导向的上导向长槽、对下铰接轴上下运动导向的下导向长槽，传动箱上还设有对第一铰接轴沿左右方向运动导向的第一导向长槽。通过设置上导向长槽、下导向长槽、第一导向长槽，增加了对上、下传动板的约束，减少了运动的自由量，使得上下传动板的运动更精确，提高了运动的同步性，保证上、下灭弧室能够实现同时开断。
附图说明
图1是发明双断口真空断路器实施例中单极装配的结构示意图；
图2是图1中的部分结构示意图；
图3是图1中的传动箱的结构示意图；
图4是图3中的三联动装置的结构示意图；
图5是图4的俯视图；
图6是图4中的超程装置的结构示意图；
图7是图3中的传动箱箱体的结构示意图。
具体实施方式
本发明双断口真空断路器的实施例：如图1-7所示，双断口真空断路器分为本体部分与操动机构部分，采用前、后布置方式。本体部分主要包括绝缘支柱1、真空灭弧室、上触臂4、下触臂、梅花触头5及传动箱10。操动机构部分位于本体断路器小车内，通过绝缘拉杆11将力传递至真空灭弧室。真空灭弧室包括上下设置的上灭弧室3、下灭弧室8，上灭弧室3、下灭弧室8之间设有传动箱10。上灭弧室3上方设有上接线板2，上触臂4与上接线板2连接。上接线板2与传动箱10之间设有均压电容6。下灭弧室8设置支撑在绝缘支柱上，两者之间设有下连接板9，下触臂12连接在下接线板9上。下接线板9与传动箱10之间也设有均压电容。
传动箱10内设有三联动装置，三联动装置包括上传动板17、下传动板18，上传动板17的左端与下传动板18的左端通过第一铰接轴铰接在一起，绝缘拉杆11沿左右方向延伸设置，绝缘拉杆11的右端传动连接在第一铰接轴上，上灭弧室3的动端设有上动导电件，下灭弧室8的动端设有下动导电件，上动导电件通过上铰接轴与上传动板的右端铰接连接，下动导电件通过下铰接轴与下传动板的右端铰接连接，传动箱上设有用于对上铰接轴上下运动导向的上导向长槽21、对下铰接轴上下运动导向的下导向长槽24， 传动箱10上还设有对第一铰接轴沿左右方向运动导向的第一导向长槽25。
传动箱作为一个整体的零件，包括左箱板、前箱板28、后箱板、上箱板26、下箱板27，左箱板、前箱板、后箱板等各个组成部分，该各个组成部分(或称各箱板)围设成开口朝右的安装空间，三联动装置在安装时可以从传动箱的右侧装入。上导向长槽21、下导向长槽24、第一导向长槽25均是有前后设置的两个且分别位于前箱板28、后箱板上。处于前箱板或后箱板上的上导向长槽、下导向长槽、第一导向长槽呈三角形分布。上导向长槽21、下导向长槽24为前后贯穿设置的上导向长孔、下导向长孔。第一导向长槽为第一导向长孔，第一导向长孔有两个且分别位于前箱板、后箱板上。为了保证传动导向精度，前后设置的上导向长孔一次加工成型，下导向长孔、第一导向长孔也是如此。
在本发明实施例一实施方式中，为了便于安装三联动装置，前箱板上设置有开口朝右的、连通上导向长孔的上让位槽22，前箱板上还设置有开口朝右的、连通所述下导向长孔的下让位槽23。
在本发明实施例一实施方式中，为了提高三联动装置的稳定性，三联动装置还包括第一中间传动板19、第二中间传动板20，第一中间传动板19左端铰接在上传动板17上，第二中间传动板20的左端铰接在下传动板18上，第一中间传动板19的右端与第二中间传动板20的右端通过第二铰接轴29铰接连接。第二铰接轴29沿前后方向设置在传动箱上，其两端分别设置在前、后箱板上。为使得中间传动板的受力较小，第一中间传动板19与上传动板17的铰接轴线处于上传动板17的长度方向的二分之一处，第二中间传动板20与下传动板18的铰接轴线处于下传动板18的长度方向的二分之一处。为了提高三联动装置的强度，上传动板、下传动板及第一、二中间传动板均是前后成对设置的。
上动导电件包括上动导电杆及上超程装置14，上超程装置包括上超程 装置本体及上下插设于上超程装置本体内的上传动杆30，上传动杆与上超程装置本体之间设有上超程弹簧31，上传动杆的处于上超程装置本体外侧的上端与上动导电杆连接，上超程装置本体与上传动板铰接。上超程装置本体具有开口朝上的上容纳腔，上传动杆为上调节螺杆，上超程弹簧套设在上调节螺杆上，上调节螺杆上设有对上超程弹簧进行上下限位的上限位部，上调节螺杆的位于所述上限位部的上方设有上锁止螺母32。上超程装置本体内于底部还设有调整垫片33。在分闸过程中，超程装置可以起到缓冲的作用。超程装置除了可以起到缓冲的作用，还有个作用是：可以提供合闸时真空灭弧室内动静触头的触头压力。
下动导电件包括下动导电杆及下超程装置15，下超程装置包括下超程装置本体及上下插设于下超程装置本体内的下传动杆，下传动杆与下超程装置本体之间设有下超程弹簧，下传动杆的处于下超程装置本体外侧的下端与下动导电杆连接，下超程装置本体与下传动板铰接。下超程装置本体具有开口朝下的下容纳腔，下传动杆为下调节螺杆，下超程弹簧套设在下调节螺杆上，下调节螺杆上设有对下超程弹簧进行上下限位的下限位部，下调节螺杆的位于下限位部的下方设有下锁止螺母。下超程装置本体内于顶部也设有调整垫片。下超程装置与上超程装置的结构一致，附图中没有单独显示。
上动导电杆与下动导电杆之间通过软连接组件电连接，软连接组件包括导电块、上软连接7、下软连接16。上、下软连接均与导电块连接。
传动箱由铸铝硅镁合金浇注而成，保证传动箱的强度。双断口断路器采用I形布置方案，结构小巧。绝缘拉杆与绝缘支撑都由环氧树脂浇注而成。每极主回路由梅花触头→上触臂→上支架→上灭弧室→软连接→下灭弧室→下支架→下触臂→梅花触头构成。主回路由上、下支架通过绝缘支柱固定于断路器小车上。
双断口真空断路器分合过程：
分闸动作：断路器操动机构拉动绝缘拉杆向左运动，带动上、下传动板进行合拢动作，上铰接轴、下铰接轴同时相向运动，传动板带动两个灭弧室同时动作，分闸完成。合闸动作：断路器操动机构推动绝缘拉杆向右运动，带动上、下传动板分叉动作，上铰接轴、下铰接轴同时相背运动，传动板带动两个灭弧室同时动作，合闸完成。在分合闸过程中，第一铰接轴在第一导向长孔的导向作用下左右移动，上铰接轴、下铰接轴分别在上导向长孔、下导向长孔的导向作用下进行上下运动。通过设置相应的导向孔，可以保证三联动装置的传动精度，使得上、下传动板同时动作，上、下两个灭弧室同时实现开断。
双断口布置的开断能力是单断口开断能力的2倍以上。在第一个间隙发生击穿情况下，另一个间隙经常临时耐受整个TRV而没有使两个间隙发生最终击穿故障。在较高的电压等级，例如40.5kV，断路器难以通过电容器开断试验。若将两个灭弧室串联起来，两个灭弧室中的每一个都具有单独的重击穿概率，击穿概率与触头行程为非线性关系。在触头开距为2×14mm时，与单开距28mm相比，绝缘耐受电压增加约40％。因为真空间隙的快速恢复，单只灭弧室可能的击穿不会导致完全击穿。在第二只灭弧室也发生击穿的情况下，将面临老炼的第一只灭弧室比以前具有更强的耐受能力。比如，在真空间隙为1.6mm时，1个真空灭弧室只能承受16kV的恢复电压；2个真空灭弧室串联时可以承受的恢复电压为51kV。同样，当真空间隙为2mm时，一个真空灭弧室只能承受38kV的恢复电压，2个真空灭弧室串联则可承受100kV。可见，双断口真空断路器无论从绝缘水平，开断能力，还是从重击穿概率低等方面都优于单断口，双断口灭弧室串联是解决真空断路器投切电容器组开关重燃概率高的根本途径。
在其它实施例中，第一铰接长孔也是不前后贯通的铰接长槽，上铰接 长孔、下铰接长孔也可不是前后贯通的，也可是盲长孔，即是导向槽。
在其它实施例中，也可不设置超程装置，上传动板通过上传动杆与上动导电杆铰接连接，下传动板通过下传动杆与下动导电杆铰接连接。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
工业实用性
本发明实施例的双断口真空断路器中包括三联动装置，其中三联动装置的上传动板的左端与下传动板的左端通过第一铰接轴铰接在一起，绝缘拉杆沿左右方向延伸设置，绝缘拉杆的右端传动连接在第一铰接轴上，上灭弧室的动端设有上动导电件，下灭弧室的动端设有下动导电件，上动导电件通过上铰接轴与上传动板的右端铰接连接，下动导电件通过下铰接轴与下传动板的右端铰接连接。在现有的断路器基础上，增加对三联动装置导向的结构。传动箱上设有用于对上铰接轴上下运动导向的上导向长槽、对下铰接轴上下运动导向的下导向长槽，传动箱上还设有对第一铰接轴沿左右方向运动导向的第一导向长槽。通过设置上导向长槽、下导向长槽、第一导向长槽，增加了对上、下传动板的约束，减少了运动的自由量，使得上下传动板的运动更精确，提高了运动的同步性，保证上、下灭弧室能够实现同时开断。

Claims (10)

  1. 一种双断口真空断路器，包括绝缘拉杆及上下设置的上灭弧室、下灭弧室，上灭弧室、下灭弧室之间设有传动箱，所述传动箱内设有三联动装置，所述三联动装置包括上传动板、下传动板，所述上传动板的左端与下传动板的左端通过第一铰接轴铰接在一起，所述绝缘拉杆沿左右方向延伸设置，所述绝缘拉杆的右端传动连接在第一铰接轴上，上灭弧室的动端设有上动导电件，下灭弧室的动端设有下动导电件，所述上动导电件通过上铰接轴与上传动板的右端铰接连接，所述下动导电件通过下铰接轴与下传动板的右端铰接连接，所述传动箱上设有用于对上铰接轴上下运动导向的上导向长槽、对下铰接轴上下运动导向的下导向长槽，所述传动箱上还设有对第一铰接轴沿左右方向运动导向的第一导向长槽。
  2. 根据权利要求1所述的双断口真空断路器，其中，所述三联动装置还包括第一中间传动板、第二中间传动板，所述第一中间传动板左端铰接在所述上传动板上，所述第二中间传动板的左端铰接在下传动板上，第一中间传动板的右端与第二中间传动板的右端通过第二铰接轴铰接连接。
  3. 根据权利要求2所述的双断口真空断路器，其中，所述第二铰接轴沿前后方向设置在所述传动箱上。
  4. 根据权利要求3所述的双断口真空断路器，其中，所述第一中间传动板与上传动板的铰接轴线处于上传动板的长度方向的二分之一处，所述第二中间传动板与下传动板的铰接轴线处于下传动板的长度方向的二分之一处。
  5. 根据权利要求3所述的双断口真空断路器，其中，所述传动箱包括左箱板、前箱板、后箱板，所述上导向长槽、下导向长槽、第一导向长槽均是有前后设置的两个且分别位于前箱板、后箱板上。
  6. 根据权利要求5所述的双断口真空断路器，其中，所述左箱板、前 箱板、后箱板围设成开口朝右的安装空间，所述上导向长槽、下导向长槽为前后贯穿设置的上导向长孔、下导向长孔，所述前箱板上设置有开口朝右的、连通所述上导向长孔的上让位槽，所述前箱板上还设置有开口朝右的、连通所述下导向长孔的下让位槽。
  7. 根据权利要求1至6任一项所述的双断口真空断路器，其中，所述上动导电件包括上动导电杆及上超程装置，所述上超程装置包括上超程装置本体及上下插设于上超程装置本体内的上传动杆，所述上传动杆与上超程装置本体之间设有上超程弹簧，所述上传动杆的处于上超程装置本体外侧的上端与所述上动导电杆连接，上超程装置本体与所述上传动板铰接。
  8. 根据权利要求7所述的双断口真空断路器，其中，所述上超程装置本体具有开口朝上的上容纳腔，所述上传动杆为上调节螺杆，所述上超程弹簧套设在上调节螺杆上，所述上调节螺杆上设有对上超程弹簧进行上下限位的上限位部，所述上调节螺杆的位于所述上限位部的上方设有上锁止螺母。
  9. 根据权利要求1至6任一项所述的双断口真空断路器，其中，所述下动导电件包括下动导电杆及下超程装置，所述下超程装置包括下超程装置本体及上下插设于下超程装置本体内的下传动杆，所述下传动杆与下超程装置本体之间设有下超程弹簧，所述下传动杆的处于下超程装置本体外侧的下端与所述下动导电杆连接，下超程装置本体与所述下传动板铰接。
  10. 根据权利要求9所述的双断口真空断路器，其中，所述下超程装置本体具有开口朝下的下容纳腔，所述下传动杆为下调节螺杆，所述下超程弹簧套设在下调节螺杆上，所述下调节螺杆上设有对下超程弹簧进行上下限位的下限位部，所述下调节螺杆的位于所述下限位部的下方设有下锁止螺母。
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