JPH02101105U - - Google Patents

Info

Publication number
JPH02101105U
JPH02101105U JP702389U JP702389U JPH02101105U JP H02101105 U JPH02101105 U JP H02101105U JP 702389 U JP702389 U JP 702389U JP 702389 U JP702389 U JP 702389U JP H02101105 U JPH02101105 U JP H02101105U
Authority
JP
Japan
Prior art keywords
control valve
directional control
valve
check valve
pilot check
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
JP702389U
Other languages
Japanese (ja)
Other versions
JP2545176Y2 (en
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 filed Critical
Priority to JP1989007023U priority Critical patent/JP2545176Y2/en
Publication of JPH02101105U publication Critical patent/JPH02101105U/ja
Application granted granted Critical
Publication of JP2545176Y2 publication Critical patent/JP2545176Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案に係る複合制御弁の一実施例を
示す負荷保持機能を特に要求される方向切換弁を
最上流に配設した複合制御弁の断面図である。 １０……複合制御弁、１２……ケーシング、１
４，１６，１８，２０……方向切換弁、２２，２
２ａ〜２８，２８ａ……給排油路、３０……ポン
プ、３２……圧油流入ポート、３４……センタバ
イパス油路、３６……タンク油路、３８……タン
ク、４０……アクチユエータ、４０ａ……ロツド
側室、４２……パイロツトチエツク弁、４３……
流入油路、４４……パイロツトポート、４６……
供給油路、４８……逆止弁。 FIG. 1 is a cross-sectional view of an embodiment of a composite control valve according to the present invention, in which a directional control valve particularly required to have a load holding function is disposed at the most upstream position. 10...Composite control valve, 12...Casing, 1
4, 16, 18, 20... Directional switching valve, 22, 2
2a to 28, 28a...oil supply/drainage path, 30...pump, 32...pressure oil inflow port, 34...center bypass oil path, 36...tank oil path, 38...tank, 40...actuator, 40a... Rod side chamber, 42... Pilot check valve, 43...
Inflow oil path, 44...Pilot port, 46...
Supply oil path, 48...check valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 複数の方向切換弁を有する複合制御弁において
、この複合制御弁内に圧油流入口からの流体の流
れに対し内部漏洩量を特に極少にさせる必要のあ
る方向切換弁を入口ポートに対し最上流または最
下流の位置に配設し、前記方向切換弁の近傍にパ
イロツト圧力により逆流防止機能を作動または解
除するパイロツトチエツク弁を配設し、さらに前
記方向切換弁の給排油路とパイロツトチエツク弁
の流入油路とを接続するよう構成したことを特徴
とする複合制御弁。 In a compound control valve that has multiple directional control valves, the directional control valve that needs to minimize the amount of internal leakage against the fluid flow from the pressure oil inlet is placed in the most upstream position relative to the inlet port. Alternatively, a pilot check valve is disposed at the most downstream position, and near the directional control valve, a pilot check valve that activates or cancels the backflow prevention function by pilot pressure is provided, and furthermore, the oil supply and drain passage of the directional control valve and the pilot check valve are provided. A composite control valve characterized in that it is configured to be connected to an inflow oil path of the valve.
JP1989007023U 1989-01-26 1989-01-26 Compound control valve Expired - Lifetime JP2545176Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989007023U JP2545176Y2 (en) 1989-01-26 1989-01-26 Compound control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989007023U JP2545176Y2 (en) 1989-01-26 1989-01-26 Compound control valve

Publications (2)

Publication Number Publication Date
JPH02101105U true JPH02101105U (en) 1990-08-13
JP2545176Y2 JP2545176Y2 (en) 1997-08-25

Family

ID=31211686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989007023U Expired - Lifetime JP2545176Y2 (en) 1989-01-26 1989-01-26 Compound control valve

Country Status (1)

Country Link
JP (1) JP2545176Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014149044A (en) * 2013-02-01 2014-08-21 Toshiba Mach Co Ltd Hydraulic control system, and construction machine having the same mounted thereon

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4935301B2 (en) * 2006-11-01 2012-05-23 コベルコ建機株式会社 Hydraulic pipe pressure release device and hydraulic pipe structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223798A (en) * 1984-04-20 1985-11-08 日本スピンドル製造株式会社 Lifting operating valve to forklift, etc.
JPS6182105U (en) * 1984-11-05 1986-05-31
JPS6383405A (en) * 1986-09-27 1988-04-14 Hitachi Constr Mach Co Ltd Oil pressure circuit for hydraulic machinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223798A (en) * 1984-04-20 1985-11-08 日本スピンドル製造株式会社 Lifting operating valve to forklift, etc.
JPS6182105U (en) * 1984-11-05 1986-05-31
JPS6383405A (en) * 1986-09-27 1988-04-14 Hitachi Constr Mach Co Ltd Oil pressure circuit for hydraulic machinery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014149044A (en) * 2013-02-01 2014-08-21 Toshiba Mach Co Ltd Hydraulic control system, and construction machine having the same mounted thereon

Also Published As

Publication number Publication date
JP2545176Y2 (en) 1997-08-25

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