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Patent Searching and Data


Title:
WATER SUPPLYING CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3183937
Kind Code:
B2
Abstract:

PURPOSE: To enable a stable flow rate of supplying water to be attained without generating any reduction in flow rate of the supplying water just after occurrence of fuel cut-back and to prevent any plant trip.
CONSTITUTION: In a supplying water control device for use in controlling a low pressure steam adjusting valve 3 and a high pressure steam adjusting valve 4, there are provided a signal changing-over means 18 for changing-over a water supplying pressure signal 17 of an input signal into the number of revolution instruction value signal outputted to get a required number of revolution of a water supplying pump 1 with a high pressure steam adjusting valve 4 for a specified period of time after occurrence of a fuel cut-back and a high value selecting means 21 for comparing the number of revolution instructing value signal got by the signal changing-over means 18 with the number of revolution instructing signal 12 of the water supplying pump got from a plant control device and selecting the higher value. The low pressure steam adjusting valve 3 and the high pressure steam adjusting valve 4 are controlled in response to the deviation between the output signal of the high value selecting means 21 and the number of revolution 13 of the water supplying pump.


Inventors:
Tsurumi, Hajime
Aoyama, Shigezo
Dosono, Takeshi
Konishi, Takao
Application Number:
JP8569092A
Publication Date:
July 09, 2001
Filing Date:
April 07, 1992
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
F22B35/00; F22D5/32; F22D5/34; (IPC1-7): F22D5/32; F22B35/00; F22D5/34
Attorney, Agent or Firm:
波多野 久 (外1名)