| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine connecting pipe in which a branching angle of a branch pipe to its main steam tube is lessened to improve turbine performance while holding increases in thickness of the branch pipe and in thermal stress to the minimum. SOLUTION: There is provided the steam turbine connecting pipe 1 that guides steam S1 flowing out from a final-stage outlet of an intermediate pressure turbine 50 to a plurality of low pressure turbines 60, 70. The steam turbine connecting pipe 1 is equipped with the main steam pipe 10 which couples the final-stage outlet of the intermediate pressure turbine 50 and an inlet of a first low pressure turbine 60 with each other to guide the steam S1 flowing out from the intermediate final-stage outlet of intermediate pressure to the first low pressure turbine 60 and in a mid-course of a straight-pipe portion 13 substantially horizontally arranged, has a narrowed portion 13a where a pipe diameter is narrowed, and a branch pipe 20 which branches downward from the main steam pipe 10 to be connected with the first low pressure turbine 70, thus guiding part of steam S2 flowing through the main steam tube 10 to the first low pressure turbine 70 and further whose upstream end is connected with the narrowed portion 13a of the main steam pipe 10. COPYRIGHT: (C)2007,JPO&INPIT
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