JPS54105301A - Pump operation control device - Google Patents
Pump operation control deviceInfo
- Publication number
- JPS54105301A JPS54105301A JP1144978A JP1144978A JPS54105301A JP S54105301 A JPS54105301 A JP S54105301A JP 1144978 A JP1144978 A JP 1144978A JP 1144978 A JP1144978 A JP 1144978A JP S54105301 A JPS54105301 A JP S54105301A
- Authority
- JP
- Japan
- Prior art keywords
- pumps
- ejection
- valves
- choking
- certain degree
- 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
- Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To prevent cavitation and make it possible to continue operation by choking the ejection valves of the remaining pumps, while in conventional systems the abnormal stop of operation of one or several pumps stop the operation of the remaining pump and disrupt water supply, by choking the ejection valves of the remaining pumps in operaton.
CONSTITUTION: In case one or several pumps of a plurality of pumps 1 connected in parallel stopped abnormally, the ejection pressure of other pumps in operation is raised by choking their ejection valves 2 to a certain degree of opening and their operation point is prevented from entering the cavitation range. That is, when contact point 86 is closed by an abnormal signal, the coil of closing-purpose electromagnetic contactor 88L is energized and ejection valves 2 are driven to the closing side. When the valves reach a certain degree of opening, intermediate limit switch 33N operates and the circuit is closed. Then the action of the coil of 88L is checked and ejection valves 2 are maintained at a certain degree of opening. By this, the ejection pressure is raised and pumps 1 are prevented from entering the cavitating range and thereby continue opeation.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1144978A JPS54105301A (en) | 1978-02-06 | 1978-02-06 | Pump operation control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1144978A JPS54105301A (en) | 1978-02-06 | 1978-02-06 | Pump operation control device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54105301A true JPS54105301A (en) | 1979-08-18 |
Family
ID=11778394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1144978A Pending JPS54105301A (en) | 1978-02-06 | 1978-02-06 | Pump operation control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54105301A (en) |
-
1978
- 1978-02-06 JP JP1144978A patent/JPS54105301A/en active Pending
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