WO2015062383A1 - 阀厅接地开关 - Google Patents

阀厅接地开关 Download PDF

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Publication number
WO2015062383A1
WO2015062383A1 PCT/CN2014/087547 CN2014087547W WO2015062383A1 WO 2015062383 A1 WO2015062383 A1 WO 2015062383A1 CN 2014087547 W CN2014087547 W CN 2014087547W WO 2015062383 A1 WO2015062383 A1 WO 2015062383A1
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Prior art keywords
grounding
cylinder
piston
valve hall
rod
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PCT/CN2014/087547
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English (en)
French (fr)
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马永旭
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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
马永旭
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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, 马永旭 filed Critical 国家电网公司
Publication of WO2015062383A1 publication Critical patent/WO2015062383A1/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

Definitions

  • the invention relates to the field of direct current power transmission and transformation equipment, and in particular to a valve hall grounding switch.
  • the valve grounding switch used in DC switchgear such as DC through-wall bushings and converter transformer bushings in the valve hall of domestic and foreign DC transmission engineering converters, such as the DC valve hall grounding disclosed in Chinese Patent CN 102832074 A "Switch”
  • the mechanical transmission method of the bevel gear and the space four-link is adopted in the process of splitting and closing.
  • the weight is often installed on the drive shaft assembled on the base. It is used to balance the heavy moment of the grounding conductive rod assembly and closing process and reduce the operating force of the mechanism.
  • a valve hall grounding switch includes a grounding conductive rod and an upper transmission base for mounting on a surface of a corresponding valve hall wall, and one end of the grounding conductive rod is rotated and matched with the upper transmission base.
  • the rotation axis of the end of the grounding conductive rod extends left and right.
  • the switch further comprises a driving mechanism for driving the grounding conductive rod to rotate about the rotation axis and swinging forward and backward with respect to the valve wall.
  • the lower part of the upper transmission base is fixed for a lower drive base mounted on the wall of the corresponding valve hall, the drive mechanism comprising a piston cylinder supported between the lower drive base and the grounding shank, the piston cylinder comprising a cylinder block and a piston rod, the bottom and the bottom of the cylinder block
  • the transmission base is hingedly connected, and the rotation axis of the bottom of the cylinder body extends left and right.
  • One end of the piston rod is inserted into the cylinder body, and the other end is hinged to the middle of the grounding conductive rod.
  • the piston cylinder is a cylinder that is pneumatically driven and whose working medium is air.
  • the valve hall grounding switch further includes a steering mechanism for controlling the reciprocating motion of the piston rod.
  • the steering mechanism includes a control component and a gas pump, and an air pipe for conveying air pressure to the cylinder to control the reciprocation of the piston rod is disposed between the steering mechanism and the piston cylinder.
  • the piston cylinder is provided with a solenoid valve for controlling the exhaust of the piston cylinder, and the operating mechanism is electrically connected with the solenoid valve.
  • the driving mechanism of the present invention includes a piston cylinder in which a piston rod is under fluid pressure Under the driving, it can repeatedly move along the axis extending direction of the cylinder.
  • the strength of the piston rod is high and the service life is long.
  • the piston rod has a supporting effect on the grounding arbor. Therefore, the piston rod can directly drive the grounding conductive rod around the rotation axis relative to the valve wall.
  • the swing operation is performed by swinging back and forth.
  • the valve hall grounding switch of the invention realizes the first-stage transmission by using the piston cylinder.
  • the valve hall grounding switch has the advantages of simple structure and low production cost, and can be used in the ⁇ 1100 UHV DC transmission project.
  • the piston cylinder is a cylinder. Since the piston cylinder is pneumatically driven, the working medium is air, and the invention has the following characteristics: air acquisition is relatively easy, and the used air can be discharged into the atmosphere without polluting the environment; The viscosity of air is very low, so the flow resistance is small, the pressure loss is small, and it is convenient for centralized and remote control.
  • the pneumatic actuator converts the pressure energy of compressed gas into mechanical energy, which has the advantages of simple transmission structure and low cost; Strong retention, high reliability, long life, safe and convenient; environmental factors such as strong electromagnetic field, high radiation and high noise in the valve hall have less influence on the gas.
  • control of the piston cylinder can be realized by the operating mechanism, which has a simple structure and convenient operation.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of a valve hall grounding switch of the present invention
  • Figure 2 is a left side view of Figure 1.
  • the valve hall grounding switch includes a grounding conductive rod 3 and an upper transmission base 2 for mounting on the upper surface of the corresponding valve hall wall, and one end of the grounding conductive rod 3 is used for The corresponding moving contact is installed, and the other end is fixed with a conductive rod rotating shaft that is rotatably engaged with the upper driving base 2, the rotating shaft of the conductive rod has a rotation axis extending in the left-right direction, and the middle portion of the grounding conductive rod 3 is provided for driving the grounding conductive rod 3 A drive mechanism that rotates about the axis of rotation of the rotating shaft of the conductive rod and swings against the front of the valve wall.
  • the grounding conductive rod 3 has a closing position in which the axis of the grounding conductive rod 3 is parallel to the valve wall, and the closing position of the axis of the grounding conductive rod 3 is approximately perpendicular to the valve wall.
  • the drive mechanism includes a piston cylinder 5 supported between a lower drive base and a grounding shank, the piston cylinder 5 including a cylinder and a piston rod for repeated movement in the direction of the axis of the cylinder.
  • a lower drive base 4 for mounting on the wall surface of the corresponding valve hall is fixed under the lower drive base 4.
  • a cylinder rotating shaft that is rotatably engaged with the lower transmission base 4 is fixed to the bottom of the cylinder block.
  • the cylinder rotating shaft is parallel to the rotating shaft of the conductive rod, and the rotating shaft of the cylinder shaft has an axis of rotation extending in the left-right direction.
  • One end of the piston rod is inserted into the cylinder body, and the other end is hinged to the middle of the grounding conductive rod 3 through a hinge 7.
  • the valve hall grounding switch further comprises a static contact 1 for mounting the movable contact when the closing position is mounted on the corresponding DC switching device, and the corresponding DC switching device is a DC through-wall bushing or a valve in the valve hall Flow transformer bushing.
  • the piston cylinder 5 is pneumatically driven
  • the piston cylinder is a cylinder
  • its working medium is air.
  • the valve hall grounding switch further comprises an operating mechanism 9 for controlling the reciprocating movement of the piston rod, the operating mechanism 9 comprising a control element and an air pump, a steering mechanism 9 and a piston cylinder Between the 5 is provided a gas delivery pipe 6 for conveying air pressure to the cylinder to control the reciprocation of the piston rod.
  • the piston cylinder 5 is provided with a solenoid valve for controlling the exhaust of the piston cylinder.
  • the operating mechanism 9 is electrically connected to the solenoid valve, and the operating mechanism controls the piston cylinder 5 through the solenoid valve.
  • Both the uploading base 2 and the lower drive base 4 are provided with a equalizing ring for shielding an uneven electric field.
  • the valve hall grounding switch further includes a shielding ring 8 disposed at a lower portion of the valve wall to shield an electric field near the moving contact on the grounding conductive rod 3 at the opening position.
  • the use process of the above embodiment 1 is: when closing, the closing button of the operating control mechanism 9 , the gas with a certain pressure enters the bottom of the cylinder along the gas pipe 6 , and the air pressure pushes the end of the piston rod to move smoothly outside the cylinder body, The end of the piston rod will push the grounding conductive rod 3 around the axis of rotation of the rotating shaft of the conductive rod to swing forward with respect to the valve wall, until the moving contact on the grounding conductive rod 3 is inserted into the static contact 1, thereby grounding the valve chamber
  • the switch completes the closing movement; when opening, the opening button of the operating mechanism 9 is operated, and the gas with a certain pressure enters the end of the cylinder along the gas pipe 6, and the end of the piston rod is smoothly moved to the cylinder, and the piston The end of the rod swings the driving grounding rod 3 around the axis of rotation of the rotating shaft of the conductive rod against the valve wall until the grounding conductive rod 3 is parallel to the valve wall, thereby completing the opening movement
  • the working medium is air
  • the invention has the following characteristics: air is relatively easy to be taken, and the used air can be discharged into the atmosphere without polluting the environment; The viscosity of air is very low, so the flow resistance is small, the pressure loss is small, and it is convenient for centralized and remote control.
  • the pneumatic actuator converts the pressure energy of compressed gas into mechanical energy, which has the advantages of simple transmission structure and low cost; Strong retention, high reliability, long life, safe and convenient; environmental factors such as strong electromagnetic field, high radiation and high noise in the valve hall have less influence on the gas.
  • the operating mechanism may further include only the control component, not including the air pump, and the operating mechanism is an independent operating unit, and the air source is supplied by the air compressor room to realize the whole.
  • the converter station shares a gas source for centralized control.
  • the piston cylinder may also be hydraulically driven, the piston cylinder is a hydraulic cylinder, and the working medium is oil.

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

Abstract

一种阀厅接地开关包括接地导电杆（3）和上传动基座（2），接地导电杆（3）的一端与上传动基座（2）转动配合，接地导电杆（3）端部的转动轴线左右延伸，该开关还包括用于驱动接地导电杆（3）绕转动轴线转动并相对阀厅墙面前后摆动的驱动机构，上传动基座（2）的下方固设有下传动基座（4），驱动机构包括支撑于下传动基座（4）与接地刀杆之间的活塞缸（5），活塞缸（5）包括缸体和活塞杆，缸体的底部与下传动基座（4）铰接连接，缸体底部的转动轴线左右延伸，活塞杆的一端插装于缸体内、另一端铰接于接地导电杆（3）的中部。由于阀厅接地开关采用活塞缸实现一级传动，具有结构简单、生产成本低的优点，可用于±1100特高压直流输电工程中。

Description

阀厅接地开关 技术领域
本发明涉及直流输变电设备领域，尤其涉及一种阀厅接地开关。
背景技术
目前，国内、外直流输电工程换流站阀厅中的直流穿墙套管、换流变压器套管等直流开关设备所采用的阀厅接地开关如中国专利CN 102832074 A公开的“直流阀厅接地开关”，其分、合闸过程采用伞齿轮及空间四连杆等机械传动方式，为了克服接地导电杆装配分、合闸过程中的重力，常采用在底座装配的传动轴上安装配重块，用来平衡接地导电杆装配分、合闸过程的重力矩，减少机构的操作力。
随着直流输电工程电压等级的提高，例如前所未有的“±1100特高压直流输电工程”，然而目前在国内、外还没有厂家研制出与上述阀厅直流开关设备配套的±1100kV阀厅接地开关。若采用现有的阀厅接地开关，会出现以下问题：由于接地导电杆长度的加长，其分、合闸过程中产生的重力矩将会成倍增加，若采用原有伞齿轮及空间四连杆等机械传动方式，传动级数将会增加，结构也会变得复杂，成本较高。
发明内容
本发明的目的在于提供一种采用流体传动的阀厅接地开关，以解决现有的多级传动机构的结构复杂的问题。
为了实现上述目的，本发明采用如下技术方案：阀厅接地开关，包括接地导电杆和用于安装在相应阀厅墙面上部的上传动基座，接地导电杆的一端与上传动基座转动配合，所述接地导电杆端部的转动轴线左右延伸，该开关还包括用于驱动接地导电杆绕转动轴线转动并相对阀厅墙面前后摆动的驱动机构，上传动基座的下方固设有用于安装在相应阀厅墙面上的下传动基座，所述驱动机构包括支撑于下传动基座与接地刀杆之间的活塞缸，活塞缸包括缸体和活塞杆，缸体的底部与下传动基座铰接连接，缸体底部的转动轴线左右延伸，活塞杆的一端插装于缸体内、另一端铰接于接地导电杆的中部。
活塞缸为采用气压传动的且工作介质为空气的气缸。
阀厅接地开关还包括用于控制活塞杆往复运动的操控机构，操控机构包括控制元件和气泵，操控机构和活塞缸之间设有用于向缸体输送气压以控制活塞杆往复运动的输气管。
活塞缸上设有控制活塞缸排气的电磁阀，操控机构与电磁阀电连接。
本发明的有益效果：本发明的驱动机构包括活塞缸，活塞缸中活塞杆在流体压力的 驱动下可以沿缸体的轴线延伸方向反复运动，活塞杆的强度高且使用寿命长，活塞杆对接地刀杆具有支撑作用，因而活塞杆可以直接驱动接地导电杆绕转动轴线相对阀厅墙面前后摆动而实现分合闸操作。与现有技术相比，本发明的阀厅接地开关采用活塞缸实现一级传动，该阀厅接地开关具有结构简单、生产成本低的优点，可用于±1100特高压直流输电工程中。
进一步的，活塞缸为气缸，由于活塞缸采用气压传动，其工作介质是空气，而使本发明具有以下特点：空气获取比较容易，使用后的空气可以排到大气中去，不会污染环境；空气的粘度很低，所以流动阻力很小，压力损失小，便于集中和远距离控制；气动执行元件将压缩气体的压力能转换为机械能，具有传动结构简单、成本低的优点；气压传动的自保持能力强，可靠性高寿命长，安全方便；阀厅中的强电磁场、高辐射、高噪声等环境因素对气体的影响较小。
进一步，通过操控机构可以实现对活塞缸的控制，该操控机构的结构简单且操作方便。
附图说明
图1是本发明的阀厅接地开关的实施例1的结构示意图；
图2是图1的左视图。
具体实施方式
本发明的实施例1，如图1-2所示：阀厅接地开关包括接地导电杆3和用于安装在相应阀厅墙面上部的上传动基座2，接地导电杆3的一端用于安装相应的动触头、另一端固设有与上传动基座2转动配合的导电杆转轴，导电杆转轴具有沿左右方向延伸的转动轴线，接地导电杆3的中部设有用于驱动接地导电杆3绕导电杆转轴的转动轴线转动并相对阀厅墙面前后摆动的驱动机构。接地导电杆3具有接地导电杆3的轴线与阀厅墙面平行的分闸位、接地导电杆3的轴线与阀厅墙面近似垂直的合闸位。该驱动机构包括支撑于下传动基座与接地刀杆之间的活塞缸5，活塞缸5包括缸体和用于沿缸体的轴线延伸方向反复运动的活塞杆。下传动基座4的下方固设有用于安装在相应阀厅墙面上的下传动基座4。缸体的底部固设有与下传动基座4转动配合的缸体转轴，缸体转轴与导电杆转轴平行，缸体转轴具有沿左右方向延伸的转动轴线。活塞杆的一端插装于缸体内、另一端通过铰链7铰接于接地导电杆3的中部。阀厅接地开关还包括用于安装于相应直流开关设备上的、在合闸位时供动触头插入的静触头1，该相应的直流开关设备为阀厅内直流穿墙套管或换流变压器套管。在本实施例中，活塞缸5采用气压传动，活塞缸为气缸，其工作介质为空气。阀厅接地开关还包括用于控制活塞杆往复运动的操控机构9，操控机构9包括控制元件和气泵，操控机构9和活塞缸 5之间设有用于向缸体输送气压以控制活塞杆往复运动的输气管6。活塞缸5上设有控制活塞缸排气的电磁阀，操控机构9与电磁阀电连接，操控机构通过电磁阀实现对活塞缸5的控制。上传动基座2和下传动基座4上均设有用于屏蔽不均匀电场的均压环。阀厅接地开关还包括设置于阀厅墙面下部的用于屏蔽处于分闸位时接地导电杆3上的动触头附近电场的屏蔽环8。
上述实施例1的使用过程：合闸时，操作操控机构9的合闸按钮，具有一定压力的气体沿输气管6进入缸体的底部，气压推动活塞杆的端部向缸体外平稳移动，活塞杆的端部将推动接地导电杆3绕导电杆转轴的转动轴线相对阀厅墙面向前摆动，直到接地导电杆3上的动触头插到静触头1中，从而使阀厅接地开关完成合闸运动；分闸时，操作操控机构9的分闸按钮，具有一定压力的气体沿输气管6进入缸体的端部，将推动活塞杆的端部向缸体内平稳移动，活塞杆的端部将驱动接地导电杆3绕导电杆转轴的转动轴线相对阀厅墙面向后摆动，直到接地导电杆3平行于阀厅墙面，从而完成阀厅接地开关的分闸运动。
在上述实施例1中，由于活塞缸5采用气压传动，其工作介质是空气，而使本发明具有以下特点：空气获取比较容易，使用后的空气可以排到大气中去，不会污染环境；空气的粘度很低，所以流动阻力很小，压力损失小，便于集中和远距离控制；气动执行元件将压缩气体的压力能转换为机械能，具有传动结构简单、成本低的优点；气压传动的自保持能力强，可靠性高，寿命长，安全方便；阀厅中的强电磁场、高辐射、高噪声等环境因素对气体的影响较小。
除上述实施例1外，本发明的其它实施例中，操控机构还可以只包括控制元件，不包括气泵，操控机构为一个独立的操作单元，气源采用空压机房集中供气，实现整个换流站共用一个气源，便于实现集中控制。
除上述实施例1外，本发明的其它实施例中，活塞缸还可以采用液压传动，活塞缸为液压缸，其工作介质为油。

Claims (4)

  1. 阀厅接地开关，包括接地导电杆和用于安装在相应阀厅墙面上部的上传动基座，接地导电杆的一端与上传动基座转动配合，所述接地导电杆端部的转动轴线左右延伸，该开关还包括用于驱动接地导电杆绕转动轴线转动并相对阀厅墙面前后摆动的驱动机构，其特征在于：上传动基座的下方固设有用于安装在相应阀厅墙面上的下传动基座，所述驱动机构包括支撑于下传动基座与接地刀杆之间的活塞缸，活塞缸包括缸体和活塞杆，缸体的底部与下传动基座铰接连接，缸体底部的转动轴线左右延伸，活塞杆的一端插装于缸体内、另一端铰接于接地导电杆的中部。
  2. 根据权利要求1所述的阀厅接地开关，其特征在于：活塞缸为采用气压传动的且工作介质为空气的气缸。
  3. 根据权利要求2所述的阀厅接地开关，其特征在于：还包括用于控制活塞杆往复运动的操控机构，操控机构包括控制元件和气泵，操控机构和活塞缸之间设有用于向缸体输送气压以控制活塞杆往复运动的输气管。
  4. 根据权利要求3所述的阀厅接地开关，其特征在于：活塞缸上设有控制活塞缸排气的电磁阀，操控机构与电磁阀电连接。
PCT/CN2014/087547 2013-10-31 2014-09-26 阀厅接地开关 WO2015062383A1 (zh)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN106531526A (zh) * 2016-12-23 2017-03-22 中国西电电气股份有限公司 一种特高压直流阀厅接地开关

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103617920B (zh) * 2013-10-31 2016-03-09 国家电网公司 阀厅接地开关

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