JPS57102579A - Control circuit of concrete transporting pump - Google Patents
Control circuit of concrete transporting pumpInfo
- Publication number
- JPS57102579A JPS57102579A JP55177599A JP17759980A JPS57102579A JP S57102579 A JPS57102579 A JP S57102579A JP 55177599 A JP55177599 A JP 55177599A JP 17759980 A JP17759980 A JP 17759980A JP S57102579 A JPS57102579 A JP S57102579A
- Authority
- JP
- Japan
- Prior art keywords
- operates
- pressure
- supplied
- pressurized oil
- pressure 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
- Reciprocating Pumps (AREA)
Abstract
PURPOSE:To provide a means capable of switching to high or low pressure without breaking operation, by making it possible to control a changeover from the rod side driving to the head side driving of a hydraulic cylinder when fluid pressure exceeds the upper limit of the set value. CONSTITUTION:In the operating condition of a pump, a pressure detector PS2 operates when the pressure of pressurized oil being supplied rises and exceeds the upper limit of the set value. As the other pressure detector PS1 also operates when the pressure detector PS2 operates, a relay contact X1 operates and remains intact by itself. Then, the pressurized oil which has been supplied through a three positions selector valve 8 to the rod sides of main hydraulic cylinders 4, 5 until that time is supplied to the head sides of the main hydraulic cylinders 4, 5 through a three positions selector valve 11. When oil pressure supply system is thus changed over, it can be maintained even if the contacts PS1, PS2 are opened by the difference between pressurized oil, supply systems, as the relay contact X1 remains intact by itself.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55177599A JPS57102579A (en) | 1980-12-16 | 1980-12-16 | Control circuit of concrete transporting pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55177599A JPS57102579A (en) | 1980-12-16 | 1980-12-16 | Control circuit of concrete transporting pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57102579A true JPS57102579A (en) | 1982-06-25 |
Family
ID=16033806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55177599A Pending JPS57102579A (en) | 1980-12-16 | 1980-12-16 | Control circuit of concrete transporting pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57102579A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60125780A (en) * | 1983-12-08 | 1985-07-05 | Kyokuto Kaihatsu Kogyo Co Ltd | High and low pressures automatic switching device of concrete pump |
-
1980
- 1980-12-16 JP JP55177599A patent/JPS57102579A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60125780A (en) * | 1983-12-08 | 1985-07-05 | Kyokuto Kaihatsu Kogyo Co Ltd | High and low pressures automatic switching device of concrete pump |
JPH0529793B2 (en) * | 1983-12-08 | 1993-05-06 | Kyokuto Kaihatsu Kogyo Co |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |