| 摘要 |
PURPOSE:To aim at reduction of work time and improvement in environment for work, in cleaning of a steam turbine diaphragm and the like, by using a diaphragm support stand of a mobile type with rack and allowing a work stand to run and move up and down freely. CONSTITUTION:Diaphragms 1 are hung out from a turbine chamber and placed on respective diaphragm support stands 20 in the case of a periodic inspection, and when a honing process is required on the 5th step left side surface, for example, a command is issued to a control unit 90 to make the 5th and 6th step support stands 20 to move rightward along a rack and rails 11 by their own driving devices, a work stand 30 to move along rails 12, a work base board 40 staying on the top position to be inserted between them, a nozzle unit 60 to be turned by a driving equipment 50, honing agent to be injected from a supply pipe 80, and each diaphragm nozzle blade to be subjected to a honing process successively. Meanwhile, a provisional cover 6 is installed during the honing process. Thus, a period of time required for the periodical inspection can be greatly decreased by reducing work time, improving the enviroment for work, and reducing an area required for work etc.
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