CN202260341U - 一种±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串 - Google Patents

一种±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串 Download PDF

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CN202260341U
CN202260341U CN 201120369697 CN201120369697U CN202260341U CN 202260341 U CN202260341 U CN 202260341U CN 201120369697 CN201120369697 CN 201120369697 CN 201120369697 U CN201120369697 U CN 201120369697U CN 202260341 U CN202260341 U CN 202260341U
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李澄宇
李力
周唯
梁明
李霞
黄欲成
赵全江
马凌
张芳杰
阎海
杨林
李辉
沈立志
杨博林
黄先绪
黄震
张柏青
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HUBEI ELECTRIC POWER SURVEY AND DESIGN INST
Northwest Electric Power Design Institute of China Power Engineering Consulting Group
Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp
China Energy Engineering Group Hunan Electric Power Design Institute Co Ltd
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HUBEI ELECTRIC POWER SURVEY AND DESIGN INST
HUNAN ELECTRIC POWER PROSPECTING DESIGN INST
Northwest Electric Power Design Institute of China Power Engineering Consulting Group
Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp
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Abstract

本实用新型提供了一种±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串，其特征在于采用一个GD型饼式挂点，GD型饼式挂点紧接U形环一，U形环一与U形环二相互配套且环环连接，再通过DB型调整板和配套U形环三，与预绞丝式耐张线夹相连，完成整串的连接。。本实用新型的有益效果是：±800kV特高压直流线路30mm重冰区地线耐张串在技术性方面优于普通输电线路地线耐张串，同时在施工、运行维护、试验等诸方面都更加安全、方便。

Description

一种±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串
技术领域
本实用新型是有关一种输电设备，尤指一种±800kV特高压直流线路30mm重冰区中使用的全新结构型式的地线预绞丝式耐张串。 
背景技术
缩略语及关键术语的定义: 
重冰区：输电线路设计覆冰厚度在20mm及以上的地区，具有海拔高、荷载大等特点。
地线耐张串：悬挂于输电线路耐张塔地线支架，带有成套的金具和附件，承受一条地线张力的绝缘子金具串。 
普通输电线路的地线耐张串，其结构形式见附图1所示。 
由图1可知，普通输电线路的地线耐张串是由挂点金具、U形挂环、调整板、等连接金具，配合耐张线夹构成。 
普通输电线路的绝缘子串有如下缺点： 
（1）采用的普通挂点金具型式，在铁塔上安装后，转动不够灵活，长期运行会因为金属杆件老化出现损坏。
（2）地线耐张线夹采用的普通压接式耐张线夹，仅能承受地线拉力，不具备防振功能。 
（3）未考虑地线对雷电流的引流，缺少引流线与铁塔的安装零件。 
实用新型内容
本实用新型的发明目的在于：针对上述存在的问题，提供一种±800kV特高压直流线路30mm重冰区地线耐张串，其特征在于采用一个GD型饼式挂点，GD型饼式挂点紧接U形环一，U形环一与U形环二相互配套且环环连接，再通过DB型调整板和配套U形环三，与预绞丝式耐张线夹相连，完成整串的连接。 
本实用新型专利±800kV特高压直流线路30mm重冰区地线耐张串，是一种采用GD型意大利饼式挂点、环环连接、预绞丝式耐张线夹、地线末端加设备线夹等的整串设计，保证了±800kV特高压直流线路的安全运行的技术要求。 
上述普通输电线路的地线耐张串的缺点，其根源在于金具串型缺点会影响重冰区线路的长期安全运行，因此针对工程的特点，通过采用合理的金具方案是±800kV特高压直流线路30mm重冰区地线耐张串设计所要解决的问题。 
±800kV特高压直流线路30mm重冰区地线耐张串规划中完成了串型荷载校验、金具挂点比选、串型布置比较、线夹选型等设计和试验工作，最终确定该串型的组装型式。 
综上所述，由于采用了上述技术方案，本实用新型的有益效果是：±800kV特高压直流线路30mm重冰区地线耐张串在技术性方面优于普通输电线路地线耐张串，同时在施工、运行维护、试验等诸方面都更加安全、方便。 
（1）挂点金具仍采用GD型意大利饼式挂点，受力合理，转动灵活，尤其适用于30mm重冰区线路的地线耐张串型。 
（2）GD型饼式挂点紧接两个配套U形环（U形环一与U形环二），环环连接进一步确保了串型转动灵活不卡碰，金具受力能够及时疏导。 
（3）简化地线引流线结构，设备线夹直接与地线引流线端头连接，避免了以往工程并沟线夹与引流线脱落的情况，增加了引流线与铁塔连接的可靠性。 
（4）采用预绞丝式地线耐张线夹，完全满足30mm冰区重覆冰荷载和脱冰跳跃的要求。通过带预绞丝缠绕的耐张线夹，加强了线夹对地线的夹握效果，能有效起到防振作用，避免地线振动滑落。 
（5）施工方面的优点 
新规划的重冰区地线耐张串的GD挂点安装是在施工组塔时候安装完毕，在施工组串过程中能防止挂点脱落，与普通地线耐张串相比，起到了避免掉串事故的作用。
（6）运行维护方面的优点 
新规划的±800kV特高压直流线路30mm重冰区地线耐张串，与普通地线耐张串相比，整串的组装金具均通过了±800kV特高压直流线路统一标准化金具设计的要求，金具的可更换性更强，容易维护，串型中不存在非标准金具。
附图说明
图1 普通重冰区地线耐张串图； 
图2 ±800kV特高压直流线路30mm重冰区地线耐张串图；
图3为图2中GD型饼式挂点的俯视图。
图中标记：1为GD型饼式挂点，2为U形环，3为DB型调整板，4为预绞丝式耐张线夹，5为设备线夹，6为预留地线。 
具体实施方式
下面结合附图，对本实用新型作详细的说明。 
为了使本实用新型的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本实用新型进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本实用新型，并不用于限定本实用新型。 
如图2所示，以金具合理布置满足技术要求为出发点，设计的±800kV特高压直流线路30mm重冰区地线耐张串见图2所示。 
由图2可知，±800kV特高压直流线路30mm重冰区地线耐张串采用一个GD型饼式挂点，接两个配套U形环（U形环一与U形环二）、再通过DB型调整板和配套U形环三，与预绞丝式耐张线夹相连，完成整串的连接。用于耐张塔地线引流线安装时，在预留地线端头安装设备线夹与铁塔连接。 
该重冰区地线耐张串型主要有以下几个特点： 
（1）挂点金具采用GD型意大利饼式挂点，该挂点结构紧凑，转动灵活。
（2）GD型饼式挂点紧接两个配套U形环（U形环一与U形环二），环环连接进一步确保了串型转动灵活。 
（3）设备线夹直接与地线引流线端头连接，结构简化。 
（4）采用预绞丝式地线耐张线夹，加强了线夹对地线的夹握效果。 
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本实用新型的保护范围之内。   

Claims (2)

1.±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串，其特征在于采用一个GD型饼式挂点，GD型饼式挂点紧接U形环一，U形环一与U形环二相互配套且环环连接，再通过DB型调整板和配套U形环三，与预绞丝式耐张线夹相连，完成整串的连接。
2.根据权利要求1所述的±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串，其特征在于该耐张串用于耐张塔地线引流线安装时，在预留地线端头安装设备线夹与铁塔连接。
CN 201120369697 2011-09-28 2011-09-28 一种±800kV特高压直流线路30mm重冰区地线预绞丝式耐张串 Expired - Lifetime CN202260341U (zh)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103963666A (zh) * 2013-01-30 2014-08-06 北京盈电电气有限公司 一种电气化铁路接触网终端锚固二次保护方案
CN104104045A (zh) * 2014-06-19 2014-10-15 国网四川省电力公司成都市新都供电分公司 扭转式电线微调拉紧系统
CN105024305A (zh) * 2015-07-15 2015-11-04 国网河南省电力公司濮阳供电公司 一种耐张塔引流线不断线施工方法
CN105217381A (zh) * 2015-09-23 2016-01-06 天津德芃科技集团有限公司 一种电线电缆的张力调节机构

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103963666A (zh) * 2013-01-30 2014-08-06 北京盈电电气有限公司 一种电气化铁路接触网终端锚固二次保护方案
CN104104045A (zh) * 2014-06-19 2014-10-15 国网四川省电力公司成都市新都供电分公司 扭转式电线微调拉紧系统
CN104104045B (zh) * 2014-06-19 2017-03-22 国网四川省电力公司成都市新都供电分公司 扭转式电线微调拉紧系统
CN105024305A (zh) * 2015-07-15 2015-11-04 国网河南省电力公司濮阳供电公司 一种耐张塔引流线不断线施工方法
CN105217381A (zh) * 2015-09-23 2016-01-06 天津德芃科技集团有限公司 一种电线电缆的张力调节机构

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