F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
60/48, 60/51
F01D 17/06 (2006.01) F01D 19/00 (2006.01) F01K 7/22 (2006.01) F01K 7/24 (2006.01) F01K 13/02 (2006.01)
Patent
CA 1070125
Abstract of the Disclosure An apparatus is disclosed for controlling a steam turbine plant which includes steam bypass systems of the type wherein the quantites of the steam flowing into a high pressure turbine with a high pressure bypass line and into a reheated steam turbine with a low pressure bypass line are con- trolled by a main steam stop valve, a steam control valve, a reheated steam stop valve and an interception valve. The apparatus includes an inter- lock for interlocking a control system for the main steam stop valve with a control system for the reheated steam stop valve. A second interlock inter- locks the steam control valve and the interception valve. The second inter- lock includes a speed relay device for controlling the second interlock so as to supply steam to the high pressure and reheated steam turbines at a predetermined ratio, a dash pot, and a low valve priority device responsive to the lower one of the control signal from the speed relay device passed through the dash pot and the control signal from the speed relay device. This controls the interception valve so as to interlock the main steam stop valve with the reheated steam stop valve and to interlock the steam control valve with the interception valve during starting of the turbine plant.
258463
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