WATER SUPPLY CONTROL VALVE CHANGE-OVER DEVICE

PURPOSE:To perform the change-over operation of a water supply control valve in a short time by changing the water supply control valve FCV to an automatic mode, thereafter, making a manual mode of a start water supply control valve LFCV, giving a wholly closing instruction and quickly wholly closin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	SHIDA TOICHI, MIZUKI FUMIO
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHINBOILERS BLASTING CONTROLLING CONTROLLING WATER LEVEL FEED-WATER SUPPLY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING LIGHTING MECHANICAL ENGINEERING NUCLEAR ENGINEERING NUCLEAR PHYSICS NUCLEAR POWER PLANT PHYSICS PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION REGULATING STEAM GENERATION SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To perform the change-over operation of a water supply control valve in a short time by changing the water supply control valve FCV to an automatic mode, thereafter, making a manual mode of a start water supply control valve LFCV, giving a wholly closing instruction and quickly wholly closing the valve LFCV. CONSTITUTION:LFCV 10 is set in an automatic mode and an opening request signal is given to PCV 9A, 9B from the state of a manual mode. Shortly, FCV 9A, 9B are started to open and a water level increases. If the water level increases, for instance, up to 30mm or higher in a set water level, FCV 9A, 9B are judged to open surely. If the judgement is performed the output of a main controller of a water supply controller 17, viz. the output up to LFCV 10 is forcedly changed to, for instance, 3%. Thereafter, after FCV 9A, 9B are changed over to the automatic mode and LFCV 10 in addition to FCV 9A, 9B has been set in the automatic mode, LFCV 10 is set in the manual mode. LFCV 10 is in the manual mode, a closing request signal is given to LFCV 10 and change-over operation is completed at a time point when LFCV 10 is wholly closed.