JPS56146086A - Controller for number of pump - Google Patents

Controller for number of pump

Info

Publication number
JPS56146086A
JPS56146086A JP4796280A JP4796280A JPS56146086A JP S56146086 A JPS56146086 A JP S56146086A JP 4796280 A JP4796280 A JP 4796280A JP 4796280 A JP4796280 A JP 4796280A JP S56146086 A JPS56146086 A JP S56146086A
Authority
JP
Japan
Prior art keywords
flow rate
computing element
operated
time
pump
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
JP4796280A
Other languages
Japanese (ja)
Inventor
Shigeo Yamada
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
Original Assignee
Hitachi Ltd
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 filed Critical Hitachi Ltd
Priority to JP4796280A priority Critical patent/JPS56146086A/en
Publication of JPS56146086A publication Critical patent/JPS56146086A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Positive-Displacement Pumps (AREA)
  • Flow Control (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

PURPOSE: To control flow rate minutely by controlling flow rate in a controlling range corresponding to the flow rate of a pump operated at that time when the flow rate of the pump operated at that time is less than the rated flow rate of pumps.
CONSTITUTION: Detecting value by means of a water-level detector 13 of a settling basin 5 is transmitted to the first computing element 1, compared with a water- level command and transmitted to the second computing element 2. Flow rate discharged from pumps 6, 7 is detected by means of flow rate detectors 8, 9, and transmitted to the third computing element 3. The amount of discharge as a target and the arithmetic value of the amount of discharge from the third computing element 3 are compared by means of the second computing element 2, and the proper controlling signals of the pumps 6, 7 are output. Detected values Q1, Q2 are multiplied by the fixed coefficients of multiplication G3WG5 by means of the third computing element 3, and the output signals Q' are output through each switch A, B, C. The switch A is closed during the time when only the pump 6 is operated, the switch B is closed during the time when only the pump 7 is operated and the switch C is closed during the time when the pumps 6, 7 are operated.
COPYRIGHT: (C)1981,JPO&Japio
JP4796280A 1980-04-14 1980-04-14 Controller for number of pump Pending JPS56146086A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4796280A JPS56146086A (en) 1980-04-14 1980-04-14 Controller for number of pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4796280A JPS56146086A (en) 1980-04-14 1980-04-14 Controller for number of pump

Publications (1)

Publication Number Publication Date
JPS56146086A true JPS56146086A (en) 1981-11-13

Family

ID=12789960

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4796280A Pending JPS56146086A (en) 1980-04-14 1980-04-14 Controller for number of pump

Country Status (1)

Country Link
JP (1) JPS56146086A (en)

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