CN102208777A - V形串导线滑车并列悬挂施工方法 - Google Patents
V形串导线滑车并列悬挂施工方法 Download PDFInfo
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- CN102208777A CN102208777A CN2011100750945A CN201110075094A CN102208777A CN 102208777 A CN102208777 A CN 102208777A CN 2011100750945 A CN2011100750945 A CN 2011100750945A CN 201110075094 A CN201110075094 A CN 201110075094A CN 102208777 A CN102208777 A CN 102208777A
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- 238000004458 analytical method Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound 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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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Abstract
本发明涉及电力工程输变电线路施工及维护检修施工方法。一种V形串导线滑车并列悬挂施工方法，其特征是：该方法一种V形串导线滑车并列悬挂施工方法，其特征是：该方法采用一个Φ22圆钢连接杆、两个-20三孔联板将合成绝缘子V形串和两个三轮导线放线滑车连接成一体。实施所述V形串导线滑车并列悬挂施工方法的挂具，其特征是：该挂具其中主要件包括有：V形串Φ22圆钢连接杆、两个-20三孔联板。本发明可广泛适用于660kV及以上大截面多分裂导线2ד一牵二”、2ד一牵2＋一牵4”和2ד一牵四”张力架线施工中V形串导线滑车的悬挂施工方法。
Description
V形串导线滑车并列悬挂施工方法
[0001] 技术领域
[0002] 本发明涉及电力工程输变电线路施工及维护检修，V形串导线滑车并列悬挂施工方法。
背景技术
[0003] 随着我国电力事业的发展，特高压架空输电线路的电压等级在不断地提高，架设的导线截面积也随着用电量的增加在不断增大，为减少导线在长期运行中出现的不均勻蠕变，根据《1000mm2导线架空送电线路张力架线施工工艺导则》的规定，在张力架线施工中， 要求同相子导线同步展放、同时收紧的施工工艺要求。
[0004] 在平原地区施工，由于电力线跨越较多且被跨越电力线路较高，宜采用2X “一牵二”张力放线施工技术，可避免因跨越线路高而增大牵引机的牵引力，增大了现有设备、器具的储备。
[0005] 在以往750kV及以上电压等级、多分裂导线张力架线施工中，通常采用2X “一牵二”和2X “一牵2+—牵4”张力放线施工方法。此类施工方法，每相导线均需悬挂两个及以上的导线放线滑车，又因多数导线金具采用V形串，故对于此类导线放线滑车的悬挂， 通常是选择用4根与V型金具串垂高相等长的钢丝绳套子（Φ 21. 5)，分别用2根钢丝绳套子顺线路方向V型悬挂1个导线放线滑车，两个导线滑车的间距1. 5m-aii之间。此类导线滑车的悬挂方式在施工当中存在以下不足：
1、在导线滑车悬挂时，由于用钢丝绳套子呈V型悬挂，需购置加工大量的钢丝绳套子， 增加了施工成本。
[0006] 2、在导线展放过程中，向导线滑车槽内穿引绳时，由于导线滑车容易摆动，施工人员无着力点，施工难度大，不利于施工。
[0007] 3、在导线展放过程中，此施工方式由于导线滑车的摆动易造成导线跳槽，增加了施工难度。
[0008] 4、在导线展放过程中，由于两套牵张设备在牵引过程中不可避免的时间差，导致导线滑车的前后左右的不规则摆动，易造成导线的鞭击而损伤导线。
[0009] 5、由于导线滑车采用钢丝绳套子悬挂方式，在架线完成后进行附件安装时，需将合成绝缘子串重新吊装，因导线已在空中悬挂且两个导线滑车间距1.5m-aii之间，在施工中需将导线合拢，这样就增加了施工难度，延长了施工工期，增加了施工成本，降低了施工效益。
[0010] 发明内容
本发明的目的在于为了解决上述2 X “一牵二”张力架线中，常规所采用的两个三轮导线滑车分开悬挂的不足，经项目部施工技术人员的研究和试验，提出了一种V形串导线滑车并列悬挂施工方法。[0011] 本发明的技术方案是：v形串导线滑车并列悬挂施工方法，其特征是：该方法采用一个Φ22圆钢连接杆、两个-20三孔联板将合成绝缘子V形串和两个三轮导线放线滑车连接成一体悬挂施工方法。
[0012] 实施所述V形串导线滑车并列悬挂施工方法的挂具，其特征是：该挂具其中主要件包括有：V形串Φ22圆钢连接杆、两个-20三孔联板。
[0013] 本发明优点和效果：采用V形串导线滑车并列悬挂施工方法后有效防止了放线过程中导线滑车迈步、前后左右不规则摆动、相互碰幢的现象，保持导线水平，走板过滑车平稳；有效地控制了同相滑车紧线时滑车迈步及子导线弧垂观测不一致问题；减少了附件安装的工作量，减少了施工难度、同时提高了施工工期及工作效率，在实际应用中效果非常好。
[0014] V形串导线滑车并列悬挂施工方法，通过施工现场的实际应用，有效地简化了多分裂导线同相两个导线滑车的悬挂问题；有效地控制了同极滑车紧线时滑车迈步及子导线弧垂观测不一致问题；规范了多分裂导线附件安装工艺。因此，本发明的V形串导线滑车并列悬挂施工方法与以往常规2X “一牵二”张力架线导线滑车的悬挂方式相比较：
1、解决了展放过程中由于各子导线承受放线张力差引起的子导线误差影响架线弧垂质量的问题；
2、避免了同步展放过程中由于外界因素(大风和导线舞动）引起的分裂导线磨损的可能，保证了放线过程中导线质量；
3、避免了同步展放后，附加安装过程中子导线就位时损伤导线的可能。
[0015] 4、相应减少了施工人员的投入数量，降低了施工成本。
[0016] 5、附件安装方便，大大提高了架线施工进度及施工工效。
[0017] 本发明V形串导线滑车并列悬挂施工方法，节约了大量的时间、人力和物力，缩短了施工工期，提高了工作效率和经济效益。适用于660kV及以上大截面多分裂导线2X“一牵二”、2X “一牵2+—牵4”和2X “一牵四”的张力架线施工。
附图说明
[0018] 以下结合附图和具体实施方式对本发明作进一步详细说明。
[0019] 图1是V形串导线滑车并列悬挂示意图； 图2是直线塔V型串导线滑车并列悬挂示意图； 图3是三孔联板2结构示意图；
图4是圆钢连接杆1结构示意图； 图5是V形串导线滑车并列悬挂受力分析图。
具体实施方式
[0020] 参照附图1-5所示，本发明的一种V形串导线滑车并列悬挂施工方法，该方法采用一个Φ22圆钢连接杆1、两个-20三孔联板2将合成绝缘子V形串3和两个三轮导线放线滑车4连接成一体悬挂施工方法。
[0021] 实施所述V形串导线滑车并列悬挂施工方法的挂具，该挂具其中主要件包括有：V 形金具串Φ22圆钢连接杆1、两个-20三孔联板2。[0022] 参照图5所示，V形串导线滑车并列悬挂各受力点的受力计算分析， 以线路最大垂直档距的塔位为例进行受力分析：
以标段塔位最大垂直档距为611m，导线为IOOOmm2大截面4X JL/G3A-1000/45钢芯铝绞线，单位重量3. 14kg/m，计算拉断力226. 15kN，安全系数2. 5，计算时考虑舞动系数1. 02。
[0023] V型金具串滑车并列悬挂受力分析如下： 由附图？可得各分力：
最大垂直档距塔位单极下压力为G ： G=lDXmXn/1000X IOX 1. 02 =611X3. 14X4/1000X10X1. 02=78. 28 (kN) 式中：1D垂直档距m
m ――导线单位重量kg/m η ---相间子导线根数单滑轮(三孔联板）下压力： Gl=G/2=39. 14 (kN)
单侧合成绝缘子(三孔联板）的斜上拉力： F1=G1/C0S45° =55.36 (kN) Φ22圆钢连接杆、三孔联板的水平拉力：
F2=FlXSin45° =39. 14 (kN) Φ22圆钢连接杆和三孔联板经邢台市科信实验室拉力试验，拉力达到124. 7kN。
[0024] 由此可见Φ22圆钢连接杆和三孔联板的拉力124. 7 (kN)远远大于最大垂直档距塔位单侧导线滑车的下压力39. 14 (kN)
安全系数(三孔联板）： 1=124. 7/55. 36=2. 31 安全系数（Φ 22连接杆）： K2=124. 7/39. 14=3. 26
计算结果可知：对最大垂直档距塔位横担将产生78. 28 kN的下压力，单滑轮下压力及连接杆的水平拉力为39. 14 kN，单侧合成绝缘子的斜上拉力为55. 36 kN，安全系数：三孔联板&为2.31、02 2圆钢连接杆1(2为3.沈。所以发明创新的V形串导线滑车并列悬挂的各受力点均满足安全要求。
[0025] 针对特高压架空输电线路架设的导线截面积增大，在现有牵引设备额定牵引力不能满足同时牵引一相（极）大截面导线要求时，宜采用2X “一牵二”张力放线施工技术。 2X “一牵二”张力放线施工技术是由2套“一牵二”放线设备组合，分别用两个“一牵二” 走板和三轮放线滑车配合放线。
[0026] 采用2X “一牵二”张力放线施工技术，可有效解决大吨位牵引机、大规格牵引绳和配套器具的重新购置问题，使现有设备、器具得到充分利用；在山区施工中还能缓解大型牵张设备的运输问题。
Claims (2)
1. 一种V形串导线滑车并列悬挂施工方法，其特征是：该方法采用一个Φ22圆钢连接杆（1)、两个-20三孔联板（2)将合成绝缘子V形串（3)和两个三轮导线放线滑车（4)连接成一体悬挂施工方法。
2. 一种实施权利要求1所述V形串导线滑车并列悬挂施工方法的挂具，其特征是：该挂具其中主要件包括有：V形串Φ22圆钢连接杆（1)、两个-20三孔联板（2)。
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