一、前言: 渔子溪二级水电站,系高水头引水式电站,在高压引水管道上,设有三个大小不同型式一样的分岔管,结构型式为月牙形内加强肋有梁岔管;三个岔管的主管直径分别为3.50m、2.94m、2.40m,支管直径为1.70m,月牙肋板厚为60mm、管壳板厚为30mm,材质均为16Mn钢;岔管的最高运行使用压力为4MP_a。岔管结构如图1所示。 First, the preface: Yuzizi two hydropower station, the Department of high head diversion water power station, in the high-pressure diversion pipe, with three different sizes of the same type of bifurcation pipe structure type crescent-shaped rib beam bifurcated pipe; The main diameter of the bifurcated pipe is 3.50m, 2.94m, 2.40m, the branch pipe diameter is 1.70m, the crescent rib thickness is 60mm, the shell thickness is 30mm, the material is 16Mn steel; the maximum operating pressure of the bifurcation pipe For 4MP_a. Bifurcated structure shown in Figure 1.