Steam turbine

Abstract

In a steam turbine plant in which a turbine casing containing a turbine is constituted of an upper-half casing and a lower-half casing, nozzles are provided to the upper-half casing and a steam supplied through main steam piping lines are delivered into the upper-half casing. Main steam pipes for supplying a steam from respective main valves to the respective nozzles are each formed so as to be dividable in a position out of the installation area of the upper-half casing.

1 - 6 . (canceled)  
   
   
       7 . A steam turbine plant comprising: 
 a boiler equipment for generating a drive steam;    a steam turbine driven by said steam from said boiler equipment;    a power generator driven by said steam turbine;    a main steam piping line connecting said boiler equipment and said steam turbine;    a main valve provided in way of said main steam piping line; and    a condenser for condensing a team discharged from said steam turbine; and wherein said steam turbine includes a turbine, a turbine casing containing said turbine, and a nozzle provided to said turbine casing and to which said main steam piping line is connected;    said turbine casing includes an upper-half casing and a lower-half casing, and said nozzle is provided to said upper-half casing; and    said main valve is set at a level higher than the setting level of said steam turbine.    
   
   
       8 . The steam turbine plant according to  claim 7 , wherein a portion of said main steam piping line connecting said main valve and said nozzle is formed so as to be dividable in a position out of an installation area of the upper-half casing.