To minimize thermal stress given to a steam turbine so as to enable early restart.
A minute opening command signal generating and outputting means 40B is provided with a timer 44 outputting an ON signal after a predetermined time limit by an ON signal of a logical sum operation means 43 computing a logical sum of an FCB generation signal 41 and a load shut-off generation signal 42 and a logical product operation means 46 outputting a steam governing valve minute opening command signal 47 due to the formation of a logical product of the other steam governing valve minute opening permission condition signal 45 and a signal of the timer 44. A minute opening post-opening command signal generating and outputting means 50B is provided with a first condition formation judging means 51 outputting a first ON signal, a second condition formation judging means 52 outputting a second ON signal, a third condition formation judging means 53, a fourth condition formation judging means 54 outputting a fourth ON signal, a fifth condition formation judging means 55 outputting a fifth ON signal, and a logical product operation means 56 outputting a steam governing valve minute opening post-opening command signal 57 due to the formation of logical product by inputting all these signals.
| JPS6072904 | [Title of the device] A test device of the steam control valve in a steam turbine |
| JPS61278676 | MAIN VAPOR SEPARATION VALVE |
| JP2013221520 | MODULAR LOUVER SYSTEM |
SATO TAKEYOSHI
AKIMARU SATOSHI
