Steam turbine
US7651318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2007 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Sep 8, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/2322
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A super steam turbine (100) into which high-temperature steam of 650° C. or more is introduced is provided with an inner steam pipe (120) which is disposed through an inner casing (110) and an outer casing (111), an outer steam pipe (130) which is welded to the outer casing (111) and disposed outside of the inner steam pipe (120) along the inner steam pipe (120) with a prescribed space therebetween, and a radiation heat shielding pipe (140) which is disposed along the inner steam pipe (120) between the inner steam pipe (120) and the outer steam pipe (130) to face a welded portion of at least the outer steam pipe (130), wherein cooling steam (160) is flown between the inner steam pipe (120) and the outer steam pipe (130), respective component parts are made of a suitable heat-resisting steel having prescribed chemical composition ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.