JPS57102579A - Control circuit of concrete transporting pump - Google Patents

Control circuit of concrete transporting pump

Info

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
Application number
JP55177599A
Other languages
Japanese (ja)
Inventor
Takeji Hamaide
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.)
IHI Corp
Kato Heavy Industries Construction Machinery Co Ltd
Original Assignee
IHI Corp
Ishikawajima Construction Machinery Co 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 IHI Corp, Ishikawajima Construction Machinery Co Ltd filed Critical IHI Corp
Priority to JP55177599A priority Critical patent/JPS57102579A/en
Publication of JPS57102579A publication Critical patent/JPS57102579A/en
Pending legal-status Critical Current

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.
JP55177599A 1980-12-16 1980-12-16 Control circuit of concrete transporting pump Pending JPS57102579A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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