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笔者曾在《水利水电技术》1980年第二期上(电力版)给出了等径三通管展开的解析公式。由于在水电站岔管施工中碰到的大多是异径三通管(即岔管半径小于主管半径),本文将根据异径三通管的不同类型,分别给出其展开图的解析公式,用以作图可提高精度,并十分简便。一、主、岔管交线内凹的异径三通管 (即o<γ2≤γ1cosθ)主、岔管交线为内凹的异径三通管平面图和断面图如图一。图中示出:主管半径γ1,
The author has given in the “water conservancy and hydropower technology” in 1980 the second period (power version) gives the analytical formula of equal-diameter tee pipe. Due to the construction of the bifurcation of hydropower station mostly encountered three-way pipe (ie bifurcated pipe radius is less than the main radius), this article will be based on different types of different diameter tee, respectively, its expansion diagram of the analytical formula, with To map to improve accuracy, and very simple. First, the main pipe bifurcated concave reducer tee (ie o <γ2 ≤ γ1cosθ) main, bifurcated pipe line for the concave three-way pipe reducer plans and cross-sectional view in Figure 1. The figure shows: the main radius γ1,