|本期目录/Table of Contents|

[1]姜文宇,吴坚,孙烨,等.过电流故障铝导线熔痕部位与组织特征关联性研究*[J].中国安全生产科学技术,2022,18(1):75-80.[doi:10.11731/j.issn.1673-193x.2022.01.012]
　JIANG Wenyu,WU Jian,SUN Ye,et al.Study on correlation between location of melted marks and microstructure characteristics of aluminum conductor under overcurrent fault[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(1):75-80.[doi:10.11731/j.issn.1673-193x.2022.01.012]
点击复制

过电流故障铝导线熔痕部位与组织特征关联性研究*
分享到：

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年1期
页码:
75-80
栏目:
职业安全卫生管理与技术
出版日期:
2022-01-31

文章信息/Info

Title:
Study on correlation between location of melted marks and microstructure characteristics of aluminum conductor under overcurrent fault
文章编号:
1673-193X(2022)-01-0075-06
作者:
姜文宇; 吴坚; 孙烨; 李阳; 何颖
（1.中国人民警察大学 研究生二队，河北 廊坊 065000；
2.台州市消防救援支队 台州湾新区大队 浙江 台州 318000；
3.中国人民警察大学 物证鉴定中心，河北 廊坊 065000；
4.中国人民警察大学 防火工程三队，河北 廊坊 065000）
Author(s):
JIANG Wenyu; WU Jian; SUN Ye; LI Yang; HE Ying
(1.Squad Two of Graduate Faculty,China People’s Police University,Langfang Hebei 065000,China;
2.Taizhou Bay New Area Brigade,Taizhou Fire Rescue Detachment,Taizhou Zhejiang 318000,China;
3.Physical Evidence Appraisal Center,China People’s Police University,Langfang Hebei 065000,China;
4.Squad Three of Fire Engineering,China People’s Police University,Langfang Hebei 065000,China)
关键词:
过电流; 铝导线; 火灾调查; 电气火灾; 熔痕特征
Keywords:
overcurrent;  aluminum conductor;  fire investigation;  electrical fire;  melted marks characteristics
分类号:
X928.7
DOI:
10.11731/j.issn.1673-193x.2022.01.012
文献标志码:
A
摘要:
为深入研究过电流故障铝导线熔痕部位与组织特征之间的关联关系，本文模拟2.5 mm2BLV铝导线通25~187.5 A电流时的发热、熔断和燃烧过程，研究过电流铝导线发热形变与熔痕形成的内在关联，根据各部位熔痕受热形成过程，分类识别典型组织特征。研究结果表明：随着电流值升高，铝导线先后出现线芯发热、绝缘热解、熔断拉弧、绝缘燃烧、重力折断等现象，发生熔断拉弧的临界电流值位于［71.5,73）A区间内；重力折断痕迹和导线本体组织受线芯发热和绝缘燃烧的共同影响，组织为粗大的块状晶，折断点为锯齿状寸断痕迹；熔断电弧熔痕为高温电弧作用于熔化金属后凝固形成，呈树枝状、纤维状铸态组织，分区分布，孔洞较少，表现为圆珠状、钝头状、尖头型、弯折状、牵拉状等5种典型形貌。通过建立熔痕部位与组织特征的关联，增加故障判断证据维度，为准确识别铝导线发生过电流故障及溯源起火过程提供数据支持。
Abstract:
To deeply study the relationship between the weld patterns of over-current aluminum wire and the microstructure characteristics,this paper studied the thermal deformation of the aluminum conductor with different overcurrent values.The heating,fusing and burning processes of 2.5 mm2 BLV aluminum conductor under the current of 25~187.5 A were simulated,then the internal correlation between the heating deformation and the melted marks formation of the overcurrent aluminum conductor was studied,and the typical microstructure characteristics were classified and identified according to the heating formation process of melted marks at each part.The results showed that with the increase of current value,the phenomena of core heating,insulation pyrolysis,fusing arc,insulation combustion and gravity breaking appeared successively in the aluminum conductor,and the critical current value of fusing arc located in the range of ［71.5,73）A.The gravity breaking mark and conductor body structure were affected by both core heating and insulation combustion,the microstructure was coarse block crystal,and the breaking point was the serrated pieces breaking mark.The melted marks of fusing arc were formed after the high-temperature arc acted on the melted metal and then solidified,which presented the dendritic and fibrous as-cast microstructures,and distributed in different regions with fewer holes.They presented as five typical morphologies,i.e.,ball,blunt end,sharp end,bending,and traction.By establishing the correlation between the melted marks and the microstructure characteristics,the dimension of fault judgment evidence was increased,and it provides data support for the accurate identification of overcurrent fault and tracing the ignition process of aluminum conductors.

参考文献/References:

［1］中华人民共和国住房和城乡建设部.住宅设计规范：GB 50096—2011［S］.北京：中国建筑工业出版社,2011.
［2］BABRAUSKAS V.Ignition handbook［M］.Issaquah,USA：Fire Science Publisher，2003.
［3］National Fire Protection Association.NFPA 921：Guide forfire and explosion investigations 2021 edition［M］.Quincy，Massachusetts:National Fire Protection Association，2020.
［4］胡建国,刘义祥,覃萍.火场中铝导线熔痕的微观形貌分析［J］.理化检验-物理分册,2004,41(8):391-396. HU Jianguo,LIU Yixiang,QIN Ping.Study on microcosmic shape topography of aluminlead melting traces in fire［J］.Physical Testing and Chemical Analysis Part A Physical Testing,2004,41(8):391-396.
［5］ETTLINNG B V.Electrical wiring in building fires ［J］.Fire Technology,1978,14(4):317-325.
［6］CHOI C S,KIM H K,KIM D O.A study on the characteristics analysis of strands melted by over current ［J］.Journal of the KIIS,2004,19(1):60-65.
［7］张金专.过负荷时间和倍数对铜导线金相组织的影响［J］.消防科学与技术，2009，28(7):543-545. ZHANG Jinzhuan.Effect of overload time and current on the metallurgical structure of Copper wire［J］.Fire Science and Technology,2009，28(7):543-545.
［8］刘伟.电气火灾中铝导线短路熔珠凝固后高温火烧对金相组织的影响［J］.科学技术与工程,2017,17(20):149-153. LIU Wei.Electrical fire chinalco short-circuit bead wire high temperature fire's influence on the microstructure after solidification［J］.Science Technology and Engineering,2017,17(20):149-153.
［9］王博,李阳,司永轩,等.ZR-BV单芯铜线过电流故障电弧熔痕特征研究［J］.中国安全生产科学技术,2019,15(12):41-47. WANG Bo,LI Yang,SI Yongxuan，et al.The features of arc beads at the end of the ZR-BV single-core copper wires carrying excessive overload［J］.Journal of safety Science and Technology,2019,15(12):41-47.
［10］PSARROS E G,POLYKRATI A D,KARAGIANNOPOULOS C G,et al.A model for calculating the temperature of aluminium particles ejected from overhead low-voltage lines owing to a short-circuit ［J］.International Journal of Wildland Fire,2009,18(6):722.
［11］LI Y,LIU X H.Study on metallographic structure of melted breakpoint mark for copper wire current overloading［J］.Procedia Engineering,2016,135:481-484.

相似文献/References:

[1]王博,李阳,司永轩,等.ZR-BV单芯铜线过电流故障电弧熔痕特征研究[J].中国安全生产科学技术,2019,15(12):41.[doi:10.11731/j.issn.1673-193x.2019.12.007]
　WANG Bo,LI Yang,SI Yongxuan,et al.Study on characteristics of arc melting trace in over current fault of ZR-BV singlecore copper wire[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(1):41.[doi:10.11731/j.issn.1673-193x.2019.12.007]
[2]孙烨,李阳,王朴真,等.RVVB护套线过电流诱发短路故障发生概率与起火燃烧过程分析*[J].中国安全生产科学技术,2021,17(3):137.[doi:10.11731/j.issn.1673-193x.2021.03.021]
　SUN Ye,LI Yang,WANG Puzhen,et al.Analysis on occurrence probability of short circuit fault induced by over current of RVVB sheathed wire and its ignition and combustion process[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(1):137.[doi:10.11731/j.issn.1673-193x.2021.03.021]
[3]杨硕,李阳,王勇,等.BVR多芯铜导线过电流故障下燃烧及火焰传播研究*[J].中国安全生产科学技术,2021,17(5):142.[doi:10.11731/j.issn.1673-193x.2021.05.022]
　YANG Shuo,LI Yang,WANG Yong,et al.Study on combustion and flame propagation of BVR multi-core copper wire under overcurrent fault[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(1):142.[doi:10.11731/j.issn.1673-193x.2021.05.022]

备注/Memo

备注/Memo:
收稿日期： 2021-05-06
* 基金项目： 国家自然科学基金项目（52074213）；河北省自然科学基金青年科学基金项目（E2021507002）；中国人民警察大学校级科研重点专项项目（2019sycxpd001）
作者简介： 姜文宇，硕士研究生，主要研究方向为电气火灾物证鉴定相关领域。
通信作者： 李阳，博士，副教授，主要研究方向为电气火灾调查及物证鉴定。
更新日期/Last Update: 2022-02-19