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WO2012088988A1 - 用于直流输电线路双串绝缘子的检修工具 - Google Patents

用于直流输电线路双串绝缘子的检修工具 Download PDF

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Publication number
WO2012088988A1
WO2012088988A1 PCT/CN2011/083183 CN2011083183W WO2012088988A1 WO 2012088988 A1 WO2012088988 A1 WO 2012088988A1 CN 2011083183 W CN2011083183 W CN 2011083183W WO 2012088988 A1 WO2012088988 A1 WO 2012088988A1
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WO
WIPO (PCT)
Prior art keywords
string
card
transmission line
tensioning device
double
Prior art date
Application number
PCT/CN2011/083183
Other languages
English (en)
French (fr)
Inventor
张明旭
康淑丰
施凤祥
王学彬
焦巨轩
高志
李中生
耿三平
苏永杰
李俭
王军
姚伯岩
陈明
宋其丰
Original Assignee
河北省电力公司超高压输变电分公司
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 河北省电力公司超高压输变电分公司 filed Critical 河北省电力公司超高压输变电分公司
Priority to CA2823137A priority Critical patent/CA2823137C/en
Publication of WO2012088988A1 publication Critical patent/WO2012088988A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
    • H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching

Definitions

  • This invention relates to the field of electrical power, and more particularly to an inspection tool for a double string insulator on a DC transmission line.
  • ultra-high voltage transmission lines have become the backbone of China's power grid, which also puts forward higher requirements for operation and maintenance work.
  • a set must be developed for The equipment required for the line operation and maintenance.
  • One of the main maintenance work on the transmission line is the repair and replacement of the insulator.
  • the high-voltage transmission line is mostly supported on the cross arm by the insulator.
  • the insulator is divided into a linear insulator and a tensile insulator, a tensile insulator single-chip porcelain insulator and a whole string insulator. .
  • the DC insulator uses a V-type composite double-string insulator with a length of about 9m. Due to the length of the insulator string and the clearance, the size of the tower carrying the insulator and the transmission line becomes larger. The vertical load is also increased accordingly, which requires higher requirements for the replacement of the insulator in terms of tension and length.
  • the transmission line maintenance tools below 500kV voltage level in China have been relatively perfect, but due to the increase of voltage level, the increase of transmission line diameter and the increase of insulator length, these maintenance tools are far from meeting the replacement requirements.
  • the technical problem to be solved by the present invention is to provide an overhaul tool for a double-string insulator dedicated to a DC 660 kV transmission line.
  • the technical solution adopted by the present invention is: an inspection tool for a double-string insulator of a direct current transmission line, including two cards for mounting in a double string insulator a side fixture and a tensioning device connected between the fixtures, the fixture includes a V-string upper card fixedly connected to the tower side angle fitting angle steel, and a cross-load upper card fixedly connected to the cross-bag board And a large knife card fixedly connected to the V-type series plate, the tensioning device being a mechanical transmission screw connected between the V-string upper card and the large knife card or between the cross-load upper card and the large knife card.
  • the V-string upper card includes a V-string upper plate and a V-string lower plate on both sides of the tower-side metal fitting hanging angle steel, and the V-string upper plate has an inner end surface and a tower The side of the metal fittings is attached to the corresponding slot of the angle steel.
  • the outer end surface of the V string lower plate is hinged with a steel joint I.
  • the other end of the steel joint I is provided with a pin hole connected with the tensioning device, the V string upper plate and the V string. Both ends of the lower plate are connected by bolts.
  • the specific structure of the cross-load upper card is: the cross-load upper card includes a cross-load upper card main body and a steel joint II for connecting with the tensioning device hinged thereto, and the cross-load upper card main body is provided with a cross arm The corresponding bolt hole of the board connecting hole.
  • the specific structure of the large knife card is: the cutter handle end of the large knife card is provided with a pin hole for connecting the tensioning device, and the cutter head end is provided with a card slot II for clamping the V-shaped series plate, the cutter head end and the card
  • the two side walls of the slot II are arranged in an elbow shape.
  • the improvement of the tensioning device is that the tensioning device is a mechanical drive screw and a hydraulic device connected to one end of the mechanical drive screw through a positioning pin or an insulating pull rod.
  • the present invention is based on a tower-type structure of a direct current transmission line, an insulator string hanging network method, a grounding line parameter, and the like, and is developed for a direct line on a DC 660 kV transmission line.
  • Insulator's electrified maintenance tool has the advantages of reasonable structure, high overall strength, light weight and reliable operation. It is a DC 660kV transmission. The safe operation of the line and the daily maintenance after the operation provide a reliable guarantee.
  • the tensioning device is arranged with the mechanical transmission screw and the hydraulic device, and is used for retracting and releasing the air between the clamps, and solves the shortcoming of the transmission speed of the hydraulic transmission system under the large mechanical load, and reduces the work of the aerial workers.
  • the residence time of the aerial work; and the structure has the function of mutual protection, that is, when one of the failures does not affect the normal operation of the other transmission mechanism, the reliability of the work is greatly improved;
  • the assembly design allows for separate storage and easy replacement and maintenance when the tensioning device is not in use.
  • FIG. 1 is a diagram showing the connection relationship between components when the inner string is replaced by the present invention
  • FIG. 2 is a diagram showing the connection relationship between components when the inner string is replaced by the present invention
  • FIG. 3 is a schematic diagram of the structure of the card on the V string.
  • Figure 4 Schematic diagram of the card for the cross arm
  • Figure 5 The main view of the card holder
  • Figure 6 The top view of the card holder; Among them: 1.
  • V string lower plate 13. steel joint I, 14. card slot I,
  • an inspection tool for a double-string insulator of a direct current transmission line including a fixture and a tensioning device, the fixture is mounted on both sides of the double-string insulator
  • the tensioning device is connected between the fixtures.
  • the fixture includes a V-string upper card 1, a cross-load upper card 2, and a large knife card 3, all of which are made of LC4 aluminum alloy material, and have the characteristics of high strength, light weight, good plasticity, and high-altitude operation.
  • the card 1 on the V string is fixedly connected to the angle of the hanging point of the tower body.
  • the specific structure is shown in Fig. 3.
  • Package The V string upper plate 11, the V string lower plate 12 and the steel joint I 13 are arranged, and the tower side side fitting angle angle steel is located between the V string upper plate 11 and the V string lower plate 12, and the V string upper plate 11 is provided on the inner end surface thereof.
  • a metal slot I 13 is hinged to the outer end surface of the V-string lower plate 12, and the other end of the steel joint I is provided with a pin hole for connecting the tensioning device; Both ends of the upper plate and the lower plate of the V string are connected by bolts.
  • the cross-arm upper card 2 is fixedly connected to the cross-loading board 8 , and the specific structure is shown in FIG. 4 . It includes a cross body upper card body 21 and a steel joint II 22 that is movably connected thereto.
  • the cross-load upper card includes two triangular aluminum alloy plates correspondingly arranged, the steel joint II is located between two triangular aluminum alloy plates, and one end of the steel joint II is movably connected to one corner of the two triangular aluminum alloy plates through the pin shaft;
  • the alloy plate is provided with a pin hole corresponding to the connecting hole on the cross-board. When connecting, the cross-board is inserted between two triangular aluminum alloy plates and fixed by bolt holes and aluminum alloy plates.
  • the large knife card 3 is fixedly connected to the V-type series plate 6, and the specific structure is shown in Fig. 5 and Fig. 6.
  • the cutter end of the large knife card 4 is provided with a pin hole for connecting the tensioning device, and the cutter head end is provided with a card slot II for engaging the V-shaped series plate, and the end faces of the cutter head and the card slot II are bent. Settings.
  • the V-shaped series plate 87 is inserted into the card slot II, and the elbow at the end of the cutter head is hooked to the bolt on the V-shaped series plate, and the tool end of the large knife card is applied opposite to the direction of the bolt force. The pulling force can realize the fixing of the large knife card and the V-shaped series plate.
  • the tensioning device is connected between the V string upper card and the large knife card or between the cross arm upper card and the large knife card.
  • the tensioning device is a combination of the mechanical transmission screw 4 and the hydraulic device 5, the mechanical transmission screw and the hydraulic device They are connected by an insulating pull rod 7.
  • the tensioning device is assembled, and one end of the hydraulic device is movably connected to one end of the steel joint I of the V string with the pin hole through the pin shaft, and the other end of the hydraulic device is fixedly connected with one end of the mechanical transmission screw through the insulating pull rod.
  • the other end of the mechanical drive screw is movably connected to the pin hole of the end by a pin and a large knife.

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  • Insulators (AREA)
  • Electric Cable Installation (AREA)

Description

用于直流输电线路双串绝缘子的检修工具
技术领域
本发明涉及电力领域，特别是一种用于直流输电线路上的双串绝缘子的检 修工具。
背景技术
随着我国电网建设的日趋完善，超高压输电线路已经成为我国电力电网的 主干网架， 这也为运行检修工作提出了更高的要求。 特别是伴随直流 660kV 电压等级输电线路在国内的首次应用， 为保证线路的正常投运， 以及对线路运 行中发现的问题及时进行检修， 以确保直流输电线路的安全运行， 则必须开发 一套用于线路运行检修所需要的工器具。 输电线路上的主要检修工作内容之一就是对绝缘子的检修更换，高压输电 线大多通过绝缘子支撑在横担上， 绝缘子分为直线绝缘子和耐张绝缘子， 耐张 绝缘子单片瓷绝缘子和整串绝缘子。 直流 660kV 电压等级的输电线路中， 直 流绝缘子采用的是 V型合成双串绝缘子， 长度约为 9m, 受绝缘子串长和电气 间隙的影响，承载绝缘子和输电线的塔头尺寸变大， 线路的垂直荷重也相应增 大， 这对绝缘子的更换要求在张力、 长度等方面就有了更高的要求。 目前国内 500kV电压等级以下的输电线路检修工具已经比较完善，但是由于电压等级的 升高， 输电线径的增大， 以及绝缘子串长的增加， 这些检修工具已经远远不能 满足更换需求。
发明内容
本发明需要解决的技术问题是提供一种专用于直流 660kV输电线路上的 双串绝缘子的检修工具。 为解决上述技术问题， 本发明所采取的技术方案是： 用于直流输电线路双串绝缘子的检修工具，包括用于卡装在双串绝缘子两 侧的卡具和连接于卡具之间的张紧装置，所述卡具包括固定连接于塔身侧金具 挂点角钢的 V串上卡、固定连接于横担包板上的横担上卡、以及固定连接在 V 型串联板的大刀卡， 所述张紧装置为连接在 V 串上卡和大刀卡之间或者横担 上卡和大刀卡之间的机械传动丝杠。 其中当更换双串绝缘子内串时， 采用 V 串上卡、 大刀卡和张紧装置的组合形式进行更换； 当更换双串绝缘子外串时， 采用横担上卡、 大刀卡和张紧装置的组合形式进行更换。 所述 V 串上卡的具体结构为： V 串上卡包括位于塔身侧金具挂点角钢两 侧的 V串上板和 V串下板， 所述 V串上板内端面上设置有与塔身侧金具挂点 角钢相应的卡槽 I , V串下板的外端面上铰接有钢接头 I ,钢接头 I的另一端 设置有与张紧装置连接的销孔， V串上板和 V串下板的两端通过螺栓连接。 所述横担上卡的具体结构为：横担上卡包括横担上卡主体和与之铰接的用 于与张紧装置进行连接的钢接头 II ,横担上卡主体上设置有与横担包板连接孔 相应的螺栓孔。 所述大刀卡的具体结构为：所述大刀卡的刀把端设置有用于连接张紧装置 的销孔， 刀头端设置有用于卡装 V型串联板的卡槽 II , 刀头端部、 卡槽 II的 两侧壁成弯头状设置。 所述张紧装置的改进在于：所述张紧装置为机械传动丝杠和与机械传动丝 杠一端通过定位销或绝缘拉棒连接的液压装置。
由于采用了上述技术方案， 本发明取得的技术进步在于： 本发明基于直流输电线路塔型结构、绝缘子串挂网方式、导地线参数等特 点研制的一种专用于直流 660kV输电线路上双串绝缘子的带电检修工器具， 具有结构合理、 整体强度高、 质量轻、 工作可靠等优点， 为直流 660kV输电 线路的安全投运和运行后的日常检修提供了可靠保障。 张紧装置呈机械传动丝杠与液压装置的配合设置，用于卡具间空行程的收 放，解决了在大机械荷载下液压传动系统存在的传动速度慢的缺点， 减少了高 空作业人员在高空作业的滞留时间； 并且此种结构具有互为保护的作用， 即当 其中一个失效时不影响另一个传动机构的正常工作， 大大提高了工作的可靠 性； 另外由于采用的是分体结构的组装设计， 在张紧装置不使用时， 可分开存 放， 便于更换和维护。
附图说明 图 1: 是本发明更换内串时各部件间的连接关系图； 图 2: 为本发明更换内串时各部件间的连接关系图； 图 3: 为 V串上卡的结构示意图； 图 4: 为横担上卡的结构示意图； 图 5: 为大刀卡的主视图； 图 6: 为大刀卡的俯视图； 其中： 1.V串上卡， 11. V串上板， 12. V串下板， 13.钢接头 I , 14.卡槽 I ,
2.横担上卡， 21.横担上卡主体， 22.钢接头 II , 3.大刀卡， 31.卡槽 II , 4.机械传 动丝杠， 5.液压装置， 6. V型串联板， 7.绝缘拉棒， 8.横担包板。
具体实施方式 下面结合附图及具体实施方式对本发明作更进一步详细说明： 用于直流输电线路双串绝缘子的检修工具， 包括卡具和张紧装置， 卡具卡 装在双串绝缘子的两侧， 张紧装置连接于卡具之间。 卡具包括 V串上卡 1、 横 担上卡 2、 以及大刀卡 3, 均是采用 LC4铝合金材料制作， 具有强度高、 重量 轻、 可塑性好、 便于高空作业的特点。
V串上卡 1固定连接在塔身侧金具挂点角钢上， 具体结构如图 3所示。 包 括 V串上板 11、 V串下板 12和钢接头 I 13 , 塔身侧金具挂点角钢位于 V串 上板 11和 V串下板 12之间， V串上板 11内端面上设置有与塔身侧金具挂点 角钢相应的卡槽 I , V串下板 12的外端面上铰接有钢接头 I 13 , 钢接头 I的 另一端设置有销孔， 用于连接张紧装置； V串上板和 V串下板的两端通过螺栓 连接。
横担上卡 2固定连接在横担包板 8上， 具体结构如图 4所示。 包括横担上 卡主体 21和与之活动连接的钢接头 II 22。 横担上卡包括相应设置的两块三角 形铝合金板，钢接头 II位于两块三角形铝合金板之间，钢接头 II的一端通过销 轴与两块三角形铝合金板的一角活动连接；三角形铝合金板上设置有与横担包 板上连接孔相应的销孔。连接时，将横担包板插接在两块三角形铝合金板之间， 通过螺栓与铝合金板的销孔固定。
大刀卡 3固定连接在 V型串联板 6上， 具体结构如图 5和如图 6所示。 大刀卡 4的刀把端设置有用于连接张紧装置的销孔，刀头端设置有用于卡装 V 型串联板的卡槽 II ,刀头端部、卡槽 II的两侧壁成弯头状设置。大刀卡使用时， 将 V型串联板 87插入卡槽 II内，将刀头端部的弯头勾住 V型串联板上的螺栓， 同时将对大刀卡的刀把端施加与螺栓受力方向相反的拉力，即可实现大刀卡与 V型串联板的固定。
张紧装置连接在 V 串上卡和大刀卡之间或者横担上卡和大刀卡之间， 张 紧装置为机械传动丝杠 4和液压装置 5的组合体，机械传动丝杠和液压装置之 间通过绝缘拉棒 7连接。
本发明用于直流 660kV输电线路上更换双串绝缘子时， 根据需要更换的 内串和外串进行不同的组合完成。 当更换双串绝缘子内串时， 采用 V 串上卡、 大刀卡和张紧装置的组合形 式进行更换， 如图 1所示。
首先将 V型串联板 6插入大刀卡的卡槽 II内， 将刀头端部的弯头勾住 V 型串联板上的螺栓， 同时将对大刀卡的刀把端施加与螺栓受力方向相反的拉 力， 即可实现大刀卡与 V型串联板的固定；
将塔身侧金具挂点角钢放置在 V串上板和 V串下板之间， 使角钢的垂直 端卡装在 V串上板的卡槽 I内， 然后用螺栓将 V串上板和 V串下板的两端固 定连接；
然后组装张紧装置，将液压装置的一端通过销轴活动连接在 V串上卡的钢 接头 I带有销孔的一端，液压装置的另一端通过绝缘拉棒与机械传动丝杠的一 端固定连接，机械传动丝杠的另一端通过销轴与大刀卡刀把端部的销孔活动连 接。
连接完成后， 收紧丝杠或者启动液压装置， 使 V 串上卡和大刀卡之间张 紧， 使内串绝缘子松弛， 不再有张力， 然后即可进行更换。
当更换双串绝缘子外串时， 采用横担上卡、 大刀卡和张紧装置的组合形式 进行更换， 如图 2所示。
首先将 V型串联板 6插入大刀卡的卡槽 II内， 将刀头端部的弯头勾住 V 型串联板上的螺栓， 同时将对大刀卡的刀把端施加与螺栓受力方向相反的拉 力， 即可实现大刀卡与 V型串联板的固定；
将横担包板 8插接在横担上卡的两块三角形铝合金板之间，使铝合金板上 的销孔与横担包板上的连接孔位置相应， 然后用螺栓穿入销孔和连接孔之间， 使横担上卡固定连接在横担包板上； 然后将液压装置的一端通过销轴活动连接在横担上卡钢接头 II带有销孔 的一端， 液压装置的另一端通过绝缘拉棒与机械传动丝杠的一端固定连接，机 械传动丝杠的另一端通过销轴与大刀卡刀把端的销孔活动连接。 连接完成后，收紧丝杠或者启动液压装置，使横担上卡和大刀卡之间张紧， 使外串绝缘子松弛， 不再有张力， 然后即可进行更换。

Claims

权 利 要 求
1、 用于直流 V输电线路双串绝缘子的检修工具， 包括用于卡装在双串绝 缘子两侧的卡具和连接于卡具之间的张紧装置， 其特征在于： 所述卡具包括固 定连接于塔身侧金具挂点角钢的 V 串上卡（1)、 固定连接于横担包板上的横 担上卡 （2)、 以及固定连接在 V型串联板上的大刀卡 （3), 所述张紧装置为 机械传动丝杠。
2、 根据权利要求 1所述的用于直流输电线路双串绝缘子的检修工具， 其 特征在于： 所述 V串上卡（ 1 )包括位于塔身侧金具挂点角钢两侧的 V串上板
(11)和 V串下板（12), 所述 V串上板（11) 内端面上设置有与塔身侧金具 挂点角钢相应的卡槽 I ( 14), V串下板（ 12)的外端面上铰接有钢接头 I ( 13), 钢接头 I的另一端设置有与张紧装置连接的销孔， V串上板和 V串下板的两端 通过螺栓连接。
3、 根据权利要求 1所述的用于直流输电线路双串绝缘子的检修工具， 其 特征在于： 所述横担上卡 （2) 包括横担上卡主体（21)和与之铰接的用于与 张紧装置进行连接的钢接头 II (22), 横担上卡主体上设置有与横担包板连接 孔相应的螺栓孔。
4、 根据权利要求 1所述的用于直流输电线路双串绝缘子的检修工具， 其 特征在于： 所述大刀卡（3) 的刀把端设置有用于连接张紧装置的销孔， 刀头 端设置有用于卡装 V型串联板的卡槽 II (31), 刀头端部、 卡槽 II的两侧壁成 弯头状设置。
5、 根据权利要求 1至 4任一项所述的用于直流输电线路双串绝缘子的检 修工具， 其特征在于： 所述张紧装置为机械传动丝杠和与机械传动丝杠一端连 接的液压装置。
PCT/CN2011/083183 2010-12-28 2011-11-29 用于直流输电线路双串绝缘子的检修工具 WO2012088988A1 (zh)

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CN103618251A (zh) * 2013-11-27 2014-03-05 国家电网公司 ±800kV特高压直流输电线路带电检修工艺
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