JPS5591784A - Method and device for changing number of running pump - Google Patents
Method and device for changing number of running pumpInfo
- 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
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
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 (3)
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 |
-
1978
- 1978-09-04 JP JP10839278A patent/JPS5591784A/en active Pending
Cited By (3)
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 |
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