基于数字射线的耐张线夹压接质量评价试验Quality Assessment Test of Strain Camp Based on Digital Radiography
赵洲峰,王若民,陈国宏,印卫佳,周桢,邹君文
ZHAO Zhoufeng,WANG Ruomin,CHEN Guohong,YIN Weijia,ZHOU Zhen,ZOU Junwen
摘要(Abstract)：
因压接质量问题导致的耐张线夹失效事故时有发生,随着线夹内部压接缺陷无损检测技术及装备的不断涌现,其检测能力验证和质量评价标准等成为亟待解决的问题。系统开展了耐张线夹压接质量的数字射线检测和评价试验,设计了钢锚和铝管压接部位凹槽欠压、钢芯和钢管压接部位未压接、铝管和导线压接部位未压接、钢管弯曲、铝管弯曲和未保压压接共6类典型缺陷,分别进行数字射线检测和握力试验。结果表明:数字射线检测技术可以直观检出除未保压压接以外的所有设计缺陷。综合握力试验和数值射线检测结果,为构建耐张线夹压接质量射线检测标准提供参考依据:凹槽欠压数量不超过2个;钢芯和钢管未压接长度小于60%;铝管和导线未压接长度小于60%;钢管和铝管弯曲度不超过2%。
The strain clamp failure occurred frequently due to bonding quality. With the continuous emergence of non-destructive testing technology and equipment for internal compression bonding of clamp, its testing capability verification and quality evaluation standards are immediate concerns. In this paper, the digital radiography detection and evaluation of the pressure connection quality of the strain clamp is carried out. Six typical defects including pressure lack of steel anchor and aluminum crimp groove, non-crimping of steel core and steel pipe crimping parts, non-crimping of aluminum tube and wire crimping parts, steel tube bending, aluminum tube bending and unpressurized clamping are designed for digital radiography detection and grip strength test. The result shows that the digital radiography detection technology can directly detect all the designed defects except the unpressurized clamping. The grip strength test and digital radiography detection results provide reference basis for strain clamp crimping quality assessment standard: the number of un-pressed groove number should not be more than 2; the length of the steel core and the steel tube without crimping should be less than 60%; the length of aluminum wire without crimping should be less than 60%; the bending of steel tube and alumina tube should not exceed 2%.
关键词(KeyWords)：
耐张线夹;压接;数字射线;握力试验
strain clamp;clamping;digital radiography;grip strength test
基金项目(Foundation): 国家电网有限公司科技项目(5211DS18000J)
作者(Author):
赵洲峰,王若民,陈国宏,印卫佳,周桢,邹君文
ZHAO Zhoufeng,WANG Ruomin,CHEN Guohong,YIN Weijia,ZHOU Zhen,ZOU Junwen
DOI: 10.19585/j.zjdl.201811007
参考文献(References)：
- [1]余虹云,龚建刚,谢志明.液压式Y型耐张线夹的研究与应用[J].浙江电力,2008,27(2):35-37.
- [2]范明,夏强峰,屠晔炜,等.一起220 kV设备引线线夹的失效故障分析[J].浙江电力,2013,32(8):29-32.
- [3]王若民,詹马骥,季坤,等.高压输电线路耐张线夹失效的原因[J].机械工程材料,2017,41(3):112-116.
- [4]胡家瑞,刘纯,欧阳克俭,等.500 kV直流输电线路耐张线夹断裂的原因分析[J].电力建设,2013,33(7):82-85.
- [5]李瑞,余虹云.变电站液压型设备线夹新工艺浅析[J].浙江电力,2007,26(2):42-44.
- [6]刘纯,熊亮,陈红冬,等.500 kV输电线路耐张线夹钢锚断裂分析[J].湖南电力,2010,30(3):14-16.
- [7]吴坤祥,朱迪锋,许杨勇,等.±800 kV特高压输电线路耐张线夹未压区鼓胀缺陷分析[J].浙江电力,2017,36(7):11-13.
- [8]输变电工程架空导线及地线液压压接工艺规程:DL/T5285-2018[S].北京:中国电力出版社,2013.
- [9]余虹云,俞成彪,余琳,等.钢芯铝绞线液压施工工艺与机电性能试验的研究[J].浙江电力,2005,24(6):18-21.
- [10]应伟国,胡旭光,黄旭骏.架空导线耐张压接管压接尺寸与机械荷载的验证[J].浙江电力,2010,29(7):14-16.
- [11]张志猛,贾伯岩,吴宏亮,等.X射线检测装置在架空输电线路压接金具质量检测中的应用[J].河北电力技术,2016,35(4):43-46.
- [12]张鹏,秦怡宁,熊细涛,等.耐张线夹和接续管压接质量的在线检测[J].江苏电机工程,2015,34(2):65-68.
- [13]吕占杰,刘冠辰,王孟,等.基于X射线的耐张线夹钢芯与铝管压接尺寸对导线承拉力综合影响的研究[J].科学技术与工程,2015,15(5):243-247.
- [14]叶建锋,王加强.导线断裂分析及耐张线夹压接位置检测[J].湖北电力,2014,38(12):37-38.
- [15]电力金具试验方法第1部分:机械试验:GB/T 2317.1-2008[S].北京:中国标准出版社,2008.