摘要
本文重述了埋地管道阴极保护的传输理论及建立的数学模型并系统阐述了各项参数的物理概念。主要参数有:沿管道纵向各点的电流、电位分布规律及相关的各项参数:管道任意点的对地电位(V);管道任意微段的纵向电流(mA);金属管的电阻率(Ω?mm2/m);金属管的纵向电阻(Ω/m);埋地管道与大地之间散流电阻(Ω?m)(又称过渡电阻、接触电阻);管道防腐层绝缘电阻(Ω?m2)(又称管道覆盖层绝缘电阻、防腐层绝缘面电阻、防腐层绝缘电阻率);衰减系数(1/m)(又称传播常数)及各项参数之间的关系。
This paper mainly describes the transmission theory and the mathematical model of buried pipeline cathode protection,including the concept of the physical parameters.The main parameters are:current and potential distribution and related parameters of the pipeline's longitudinal points:pipeline-soil potential(V);longitudinal current of the pipeline's arbitrary micro-channels(mA);resistance Rate of metal pipe(Ωmm2/m);longitudinal resistance of metal pipe(Ω/m);the resistance of stray current between buried pipeline and the earth(Ωm)(also known as:transitional resistance,contact resistance);pipeline coating insulation resistance(Ωm2)(also known as:Pipeline cover insulation resistance,insulation resistance of anti-corrosion layer,insulation resistance rate of anti-corrosion layer);attenuation coefficient(1/m)(also known as:diffuse constant) and relations between the various parameters.
出处
《科技传播》
2010年第6期133-135,共3页
Public Communication of Science & Technology
关键词
埋地管道
阴极保护
汇流点
传输参数
管道防腐层绝缘电阻
Buried pipeline
Cathode protection
Convergence point
Transmission parameters
Pipeline coating insulation resistance
