JPS579303A - Pressure control circuit for pressure intensifier - Google Patents

Pressure control circuit for pressure intensifier

Info

Publication number
JPS579303A
JPS579303A JP8246380A JP8246380A JPS579303A JP S579303 A JPS579303 A JP S579303A JP 8246380 A JP8246380 A JP 8246380A JP 8246380 A JP8246380 A JP 8246380A JP S579303 A JPS579303 A JP S579303A
Authority
JP
Japan
Prior art keywords
pressure
valves
pipelines
intensifiers
pump
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.)
Granted
Application number
JP8246380A
Other languages
Japanese (ja)
Other versions
JPH0228723B2 (en
Inventor
Masakatsu Kawahara
Masaru Takeda
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP55082463A priority Critical patent/JPH0228723B2/en
Publication of JPS579303A publication Critical patent/JPS579303A/en
Publication of JPH0228723B2 publication Critical patent/JPH0228723B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • Control Of Presses (AREA)

Abstract

PURPOSE: To easily and continuously perform pressure-intensifying and reducing operations for a control circuit by only one pressure control valve as well as permit the reduction of pressure by a pressure intensifier itself by utilizing a change in volume due to combinations of plural pressure intensifiers.
CONSTITUTION: Stop valves 17 and 18 are each provided to pipelines 19 and 20 connecting the high-pressure side chambers 9 and 10 of pressure intensifiers 7 and 8 with a pressure oil discharge 6. Also, the high-pressure side chambers 9 and 10 are connected to a low-pressure pump 4 through pipelines 24 and 25 with stop valves 21 and 22 and a direction switch valve 23. And, cylinders 26W29 for opening and closing operations are provided to each of the stop valves 17, 18, 21, and 22, which are controlled by direction switching pilot valve 39W33. On the other hand, the low- pressure side chambers 11 and 12 of the pressure intensifiers 7 and 8 are connected to a high-pressure pump 5 through pipelines 41 and 42 with check valves 37 and 38 and direction switch valves 39 and 40. These direction switch valves 35, 39, 40, and 43 are connected to an oil tank 1 through a return circuit 48 connected with the discharge pipeline of the pump 5 through an electromagnetic proportion-type pressure control valve 49.
COPYRIGHT: (C)1982,JPO&Japio
JP55082463A 1980-06-17 1980-06-17 ZOATSUKINOATSURYOKUSEIGYOKAIRO Expired - Lifetime JPH0228723B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55082463A JPH0228723B2 (en) 1980-06-17 1980-06-17 ZOATSUKINOATSURYOKUSEIGYOKAIRO

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55082463A JPH0228723B2 (en) 1980-06-17 1980-06-17 ZOATSUKINOATSURYOKUSEIGYOKAIRO

Publications (2)

Publication Number Publication Date
JPS579303A true JPS579303A (en) 1982-01-18
JPH0228723B2 JPH0228723B2 (en) 1990-06-26

Family

ID=13775195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55082463A Expired - Lifetime JPH0228723B2 (en) 1980-06-17 1980-06-17 ZOATSUKINOATSURYOKUSEIGYOKAIRO

Country Status (1)

Country Link
JP (1) JPH0228723B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105204U (en) * 1991-02-16 1992-09-10 石塚硝子株式会社 Hydraulic system for press cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105204U (en) * 1991-02-16 1992-09-10 石塚硝子株式会社 Hydraulic system for press cylinder

Also Published As

Publication number Publication date
JPH0228723B2 (en) 1990-06-26

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