JPS5591784A - Method and device for changing number of running pump - Google Patents

Method and device for changing number of running pump

Info

Publication number
JPS5591784A
JPS5591784A JP10839278A JP10839278A JPS5591784A JP S5591784 A JPS5591784 A JP S5591784A JP 10839278 A JP10839278 A JP 10839278A JP 10839278 A JP10839278 A JP 10839278A JP S5591784 A JPS5591784 A JP S5591784A
Authority
JP
Japan
Prior art keywords
pressure
flow quantity
pump
signals
detector
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
JP10839278A
Other languages
Japanese (ja)
Inventor
Masakatsu Ooya
Tsuyoshi Tomita
Koichi Naoi
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Priority to JP10839278A priority Critical patent/JPS5591784A/en
Publication of JPS5591784A publication Critical patent/JPS5591784A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To move the point of changing number of pumps for each resistance curve securely by the pressure difference between pump suction pressure for a set pressure value and pump discharge pressure or the value of pump discharge pressure.
CONSTITUTION: Water is supplied from a distributing reservoir 1 to pumps 2 connected in parallel and then conveyed via piping 3 to users 4, 5 of genrally different resistance curves. On the discharge side of the pumps 2, a pressure detector 6 and a flow quantity detector 7 are provided, signals p from this pressure detector 6 are compared with the signals P of a pressure setter 8 by a comparator 6' and supplied to a number changing control device 9. On the other hand, signals q from the flow quantity detector 7 are compared with signals Q from a flow quantity setter 10 by a comparator 7' and supplied to the number changing control device 9. For example, when the signal p is lower than a set pressure P1, the second pump starts and stops at a pump change-over point C1, but a flow quantity q is compared with a set flow quantity Q and the second pump starts when the flow quantity is at Q4 and stops at Q3.
COPYRIGHT: (C)1980,JPO&Japio
JP10839278A 1978-09-04 1978-09-04 Method and device for changing number of running pump Pending JPS5591784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10839278A JPS5591784A (en) 1978-09-04 1978-09-04 Method and device for changing number of running pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10839278A JPS5591784A (en) 1978-09-04 1978-09-04 Method and device for changing number of running pump

Publications (1)

Publication Number Publication Date
JPS5591784A true JPS5591784A (en) 1980-07-11

Family

ID=14483591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10839278A Pending JPS5591784A (en) 1978-09-04 1978-09-04 Method and device for changing number of running pump

Country Status (1)

Country Link
JP (1) JPS5591784A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57120782U (en) * 1981-01-20 1982-07-27
US4526513A (en) * 1980-07-18 1985-07-02 Acco Industries Inc. Method and apparatus for control of pipeline compressors
JPS6157193U (en) * 1984-09-20 1986-04-17
CN117468542A (en) * 2023-12-13 2024-01-30 浙江利欧环境科技有限公司 A smart tankless laminated water supply equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526513A (en) * 1980-07-18 1985-07-02 Acco Industries Inc. Method and apparatus for control of pipeline compressors
JPS57120782U (en) * 1981-01-20 1982-07-27
JPS6157193U (en) * 1984-09-20 1986-04-17
CN117468542A (en) * 2023-12-13 2024-01-30 浙江利欧环境科技有限公司 A smart tankless laminated water supply equipment

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