JPS5786912A - Controlling method for pressure reducing valve - Google Patents

Controlling method for pressure reducing valve

Info

Publication number
JPS5786912A
JPS5786912A JP16189580A JP16189580A JPS5786912A JP S5786912 A JPS5786912 A JP S5786912A JP 16189580 A JP16189580 A JP 16189580A JP 16189580 A JP16189580 A JP 16189580A JP S5786912 A JPS5786912 A JP S5786912A
Authority
JP
Japan
Prior art keywords
valve
subordinate
opening
degree
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16189580A
Other languages
Japanese (ja)
Inventor
Teruo Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Information and Control Systems Inc
Original Assignee
Hitachi Ltd
Hitachi Control Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Control Systems Inc filed Critical Hitachi Ltd
Priority to JP16189580A priority Critical patent/JPS5786912A/en
Publication of JPS5786912A publication Critical patent/JPS5786912A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/204—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in parallel

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

PURPOSE:To hold the pressure of water distribution during valve switching adequately by adjusting a subordinate valve to a target degree of opening when consumption decreases and controlling a main valve to a full-closed state by a valve control, which consists of the main and subordinate valves, on a water distribution system by a natural downfall. CONSTITUTION:When consumption decreases, the quantity of flow Q and pressure, obtained by a flowmeter 45 and a pressure oscillator 46 installed at a distributing water pipe 41, are inputted to the operator 48 of an arithmetic device 47 to calculate the target degree of opening of a subordinate valve 43. This target degree of the subordinate valve 43 is inputted from a subordinte-valve opening degree setter 11 to a comparator 14. The comparator 14 compares the target subordinate-valve opening degree with a signal from an opening degree gauge 18 and sends an opening signal to a driving circuit 16 which drives an IM15 coupling with the subordinate valve 43. When the subordinate valve 43 reaches the target degree of opening, a main-valve closure signal is sent to the driving circuit 16 of the side of a main valve 42.
JP16189580A 1980-11-19 1980-11-19 Controlling method for pressure reducing valve Pending JPS5786912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16189580A JPS5786912A (en) 1980-11-19 1980-11-19 Controlling method for pressure reducing valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16189580A JPS5786912A (en) 1980-11-19 1980-11-19 Controlling method for pressure reducing valve

Publications (1)

Publication Number Publication Date
JPS5786912A true JPS5786912A (en) 1982-05-31

Family

ID=15744040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16189580A Pending JPS5786912A (en) 1980-11-19 1980-11-19 Controlling method for pressure reducing valve

Country Status (1)

Country Link
JP (1) JPS5786912A (en)

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