JPS61175301A - Tandem circuit device of load sensing-type multiple control valve - Google Patents
Tandem circuit device of load sensing-type multiple control valveInfo
- Publication number
- JPS61175301A JPS61175301A JP1349885A JP1349885A JPS61175301A JP S61175301 A JPS61175301 A JP S61175301A JP 1349885 A JP1349885 A JP 1349885A JP 1349885 A JP1349885 A JP 1349885A JP S61175301 A JPS61175301 A JP S61175301A
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- valve
- load sensing
- pressure
- actuator
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/41—Flow control characterised by the positions of the valve element
- F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/455—Control of flow in the feed line, i.e. meter-in control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/57—Control of a differential pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分骨）
本発明は、建設機械等のように複数個設けらｎた油圧ア
クチュエータを１共通の圧油供給回路から四−ドセンシ
ング形マルチプルコント田−ル弁を介して供給される流
体で作動制御するタンデム回路装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application) The present invention provides a method for connecting a plurality of hydraulic actuators, such as those used in construction machinery, from a single common pressure oil supply circuit to a four-sensing type multiple control unit. The present invention relates to a tandem circuit device whose operation is controlled by fluid supplied through a valve.
（従来の技術）。(Conventional technology).
従来、１１！１図示のように、複数個の油圧アクチェエ
ータａ、ｂに、センタバイパス形のマルチプルコントロ
ール弁ａＳ４１（介して共通の圧油供給回路・から圧力
流体を供給するようにしたタンデム回路装置が知られて
おり、こｎに於ては各コントロール弁ｃ１ａがセンタバ
イパス形のもので構成されているので、圧油供給回路・
の上流側即ちポンプ側に設けられたコント一−ル弁０を
切換えると該回路・の流量を油圧アクチュエータｂへ供
給せずに全てアクチェエータａに於て消費し、該アクチ
ュエータａｔ−優先的に駆動することが出来る。Conventionally, as shown in Figure 11!1, a tandem circuit device has been used in which pressure fluid is supplied to a plurality of hydraulic actuators a and b from a common pressure oil supply circuit via a center bypass type multiple control valve aS41. is known, and in this case, each control valve c1a is constructed of a center bypass type, so that the pressure oil supply circuit and
When the control valve 0 provided on the upstream side, that is, the pump side, is switched, the flow rate of the circuit is not supplied to the hydraulic actuator B, but is all consumed in the actuator A, and the actuator AT is driven preferentially. You can.
また、第２図示のようく、油圧アクチェエータｆ（ロー
ドセンシングｇ−） ｇを備えたフント胃−ル弁ｈ２介
して圧油供給回路１から流体を供給することも行なわｎ
ており、これによれば 。Further, as shown in the second diagram, fluid is supplied from the pressure oil supply circuit 1 through a Hund gas valve h2 equipped with a hydraulic actuator f (load sensing g).
According to this.
該ポー）ｇに得らｎる負荷圧に応じてパイロットリリー
フ弁ｊｔ−備えたブリードオフ形コンペンセータｋがコ
ント田−ル弁五のスプールの前後の圧力を一定とするよ
うに制御するためアクチュエータｆの負荷圧に影響され
ずにスプールのスト田−りに比例した流量を該回路１に
流すことが出来る。In order to control the bleed-off type compensator k equipped with the pilot relief valve jt to keep the pressure before and after the spool of the control valve 5 constant according to the load pressure obtained at the port 5, the actuator f is used. A flow rate proportional to the stroke of the spool can flow through the circuit 1 without being affected by the load pressure of the spool.
（発明が解決しようとする問題点）
前記のセンタバイパス形のマルチプルコントロール弁は
その弁を操作するだけで特定のアクチュエータを他のア
クチェエータよりも優先して駆動することが出来るが、
該弁は内部にセンタバイパス流路を有するので該弁のス
プール切換量を適度に制御してアクチュエータへの流量
を制御することは出来ず流量特性が悪い欠点がある。(Problems to be Solved by the Invention) The center bypass type multiple control valve described above can drive a specific actuator with priority over other actuators simply by operating the valve.
Since the valve has an internal center bypass flow path, it is not possible to appropriately control the spool switching amount of the valve to control the flow rate to the actuator, which has the disadvantage of poor flow characteristics.
また四−ドセンシング形のコントロール弁はセンタバイ
パス流路のように他の弁への圧油供給回路の流体の流通
遮断を行なえないのでその弁を操作するだけで特定のア
クチュエータを優先的に駆動することが出来ない欠点が
ある。In addition, unlike the center bypass flow path, a four-way sensing type control valve cannot shut off the flow of fluid in the pressure oil supply circuit to other valves, so just by operating that valve, a specific actuator can be driven preferentially. There is a drawback that it cannot be done.
本発明は流量特性が良くエネルギ損失の少ない制御を行
なえる四−ドセンシング形のコント。The present invention is a four-sensing type control device that has good flow characteristics and can perform control with little energy loss.
−ル弁を使用して特定のアクチュエータヲ優先駆動し得
るタンデム回路を構成することを目的とするものである
。The object of the present invention is to construct a tandem circuit that can preferentially drive a specific actuator using a roll valve.
（問題点を解決するための手段）
本発明では、ロードセンシングホートラ備えたコントロ
ール弁の複数個に夫々アクチュエータを接続し、各アク
チェエータに各コントロール弁を介して共通の圧油供給
回路を接続するようにしたものに於て、優先駆動される
べきアクチュエータに接続した優先駆動用のコントロー
ル弁のロードセンシングポートを、他のコントロール弁
と圧油供給回路との接続回路に設けられ且つ該圧油供給
回路の圧力で開く四シック弁に接続し、該ロジック弁を
該優先駆動用のコントロール弁のロードセンシングポー
トの圧力で閉弁するようにした。(Means for solving the problem) In the present invention, an actuator is connected to each of a plurality of control valves equipped with a load sensing controller, and a common pressure oil supply circuit is connected to each actuator via each control valve. In such a device, the load sensing port of the control valve for preferential drive connected to the actuator to be preferentially driven is provided in the connection circuit between the other control valve and the pressure oil supply circuit, and It was connected to a four-sick valve that opens with the pressure of the circuit, and the logic valve was closed with the pressure of the load sensing port of the control valve for priority drive.
（作用）
優先駆動用のコン）Ｅｌ−ル弁が操作されるとそのり一
ド七ンシング＆−）に負荷圧が発生し、該負荷圧は他の
コントロール弁の接続回路に介在させたロジック弁を閉
弁すべく作用するので圧油供給回路の一体は他のコント
ロール弁へは流れず、優先駆動用のコントロール弁に接
続したアクチュエータだけが駆動される。(Function) When the control valve for priority drive is operated, a load pressure is generated in the control valve, and the load pressure is generated by the logic interposed in the connection circuit of the other control valves. Since it acts to close the valve, the pressure oil supply circuit does not flow to other control valves, and only the actuator connected to the control valve for priority drive is driven.
他のコントロール弁が操作されており高い圧力でアクチ
ュエータを駆動中である場合、優先駆動用のコントロー
ル弁が操作さｎｌそのロードセンシングポートに発生す
る負荷圧が低いと圧油供給回路の流量は他のコントａ−
ル弁には流ｎず、優先駆動用のコントロール弁へ流れる
。If other control valves are being operated and the actuator is being driven at a high pressure, the control valve for priority drive will be operated.If the load pressure generated at that load sensing port is low, the flow rate of the pressure oil supply circuit will be Control a-
It does not flow to the control valve, but flows to the control valve for priority drive.
また該優先駆動用のコントロール弁の四−ドセンシング
ボートに発生する負荷圧が駆動中の他のコントロール弁
のアクチュエータの負荷圧よりも高いときは、ロジック
弁は強制的に優先駆髄田バー１％ノ％＋ロール血め費−
Ｖ七５〜ν／＆−トの圧力により閉じられ、該優先のコ
ントロール弁へ圧油供給回路の流量が集中して流れる。In addition, when the load pressure generated on the four-wheel sensing boat of the control valve for priority drive is higher than the load pressure of the actuator of the other control valves that are being driven, the logic valve forcibly forces the priority drive %ノ%＋roll blood cost−
It is closed by a pressure of V75~ν/&-t, and the flow rate of the pressure oil supply circuit flows concentratedly to the priority control valve.
（実施例）
本発明の実施例をｔＳＳ図示の２連形のタンデム回路の
場合につき説明すると、（１）１２）はロードセンシン
グポートａ１）ｔ−備えたコントロール弁、（３） （
４） Ｇｆ 各コントロール弁（１）（２）に接続した
油圧モータその他のアクキュエータ、（５）は油圧ポン
プ（６）から流量が供給され”る圧油供給回路、（７）
は該供給回路（５）の高圧をタンク（８）へと排するブ
リードオフ形フンペンセータである。該フンペンセータ
（７）のばね室側回路（９）はシャトル弁α〔を介して
各コントロール弁（１） （２）のロードセンシングポ
ートαＪに接続されると共だ該フンペンセータ（７）と
の組合せ機能によりリリーフ作動を行なうパイロットリ
リーフ弁α２に接続さｎる。(Embodiment) An embodiment of the present invention will be explained in the case of a double tandem circuit shown in the tSS diagram. (1) 12) is a control valve equipped with a load sensing port a1) t;
4) Gf Hydraulic motor and other actuators connected to each control valve (1) (2), (5) is a pressure oil supply circuit to which the flow is supplied from the hydraulic pump (6), (7)
is a bleed-off type humpenseter which discharges the high pressure of the supply circuit (5) to the tank (8). The spring chamber side circuit (9) of the pump sweater (7) is connected to the load sensing port αJ of each control valve (1) (2) via the shuttle valve α. It is connected to a pilot relief valve α2 which performs a relief operation according to its function.
いずれか一方のコントロール弁（１）（２）が操作され
て四−ドセンシングボートに発生した負荷圧は該フンペ
ンセータ（７１に作用し、該フンペンセータ（７）は圧
油供給回路（５）の圧力が負荷圧よりも該フンベンセー
タ（７）のスプリング力相当の圧力だけ高く制御し、該
スプールストロークに見合ったフローコントロールが行
なえる。The load pressure generated in the four-door sensing boat when either one of the control valves (1) or (2) is operated acts on the pressure damper (71), which controls the pressure of the pressure oil supply circuit (5). is controlled to be higher than the load pressure by a pressure equivalent to the spring force of the spool pump (7), and flow control commensurate with the spool stroke can be performed.
優先駆動用のコントロール弁（１）のロードセンシング
ボーＮｕυは他のコントロール弁（２）の接続回路（１
３１に介在させたロジック弁α尋のポペット（ｌ！１９
の背面に接続され、該ボートαυに負荷圧が発生すると
その圧力はロジック弁Ｉの背面にばねａｅと共にこれを
閉じるべく作用する。該ポペットσ９の前面に作用する
接続回路αｊの圧力による力がその背面に作用する力よ
りも大きいと該弁α４は開弁し、圧油供給回路（５）か
らコントロール弁（２）を介してアクチュエータ（４）
へと流体が流ｎる。The load sensing bow Nuυ of the control valve (1) for priority drive is connected to the connection circuit (1) of the other control valve (2).
Logic valve α fathom poppet (l!19
When a load pressure is generated on the boat αυ, the pressure acts on the back side of the logic valve I together with a spring ae to close it. When the force due to the pressure of the connection circuit αj acting on the front side of the poppet σ9 is larger than the force acting on the back side, the valve α4 opens and the pressure oil is supplied from the pressure oil supply circuit (5) via the control valve (2). Actuator (4)
Fluid flows into the area.
優先駆動用のコントロール弁（１）の操作でアクチュエ
ータ（３）の負荷圧がボートαυからロジック弁α４に
作用すると該弁Ｉは閉弁するのでフン）ａ−ル弁（２）
には圧油供給回路（５）から流量が流れず、専らコント
ロール弁（１）へと流れ、そのアクチュエータ＋３１
′ｔ−他のアクチュエータ（４）よりも優先的に駆動す
ることが出来る。When the load pressure of the actuator (3) acts from the boat αυ to the logic valve α4 by operating the control valve (1) for priority drive, the valve I closes, so the a-le valve (2)
The flow does not flow from the pressure oil supply circuit (5) to the control valve (1), and its actuator +31
't-Can be driven preferentially over other actuators (4).
各フン）０−ル弁（１）＋２）にはセンタバイパス流路
がないのでその操作の際にアクチュエータＴ３１ （４
）の駆動速度の制御のためにストロークを調節し乍ら流
量を制御することが出来る。Since the valves (1) + 2) do not have a center bypass flow path, when operating them, actuator T31 (4)
) can control the flow rate while adjusting the stroke to control the drive speed.
（発明の効果）
このように本発明によるときは優先駆動用のコントロー
ル弁のロードセンシングポートを他のコントロール弁の
接続回路に設けたロジック弁に接続し、該ボートの圧力
で該ロジック弁を閉弁するようにしたので、ロードセン
シング形のコントロール弁でタンデム回路装ｆを構成し
、特定のアクチュエータを優先的に駆動することが出来
、流量特性も良く、エネルギ経済性の良い装置が得られ
る効果がある。(Effect of the invention) According to the present invention, the load sensing port of the control valve for priority drive is connected to the logic valve provided in the connection circuit of the other control valve, and the logic valve is closed by the pressure of the boat. Since the tandem circuit device f is configured with a load sensing type control valve, it is possible to preferentially drive a specific actuator, and the effect is that a device with good flow characteristics and good energy economy can be obtained. There is.
！！１１図Ｇｌｅ来のセンタバイパス形マルチプルコン
トロール弁の使用例の線図、第２ｖｌは従来のロードセ
ンシング形コントｐ−ル弁の使用例の線図、第３図は本
発明の実施例の線図である。
（ＩＯ２）・・・コントロール弁＋３１（４）・・・ア
クチュエータ（５）・・・圧油供給回路
（１１Ｊ・・・ロードセンシングポートａ３・・・接続
回路 ａ４・・・ロジック弁外２名! ! Figure 11 is a line diagram of an example of use of the conventional center bypass type multiple control valve, 2nd vl is a line diagram of an example of use of a conventional load sensing type control valve, and Figure 3 is a line diagram of an embodiment of the present invention. It is. (IO2)...Control valve +31 (4)...Actuator (5)...Pressure oil supply circuit (11J...Load sensing port a3...Connection circuit a4...2 people other than logic valve)
Claims (1)
個に夫々アクチュエータを接続し、各アクチユエータに
各コントロール弁を介して共通の圧油供給回路を接続す
るようにしたものに於て、優先駆動されるべきアクチユ
エータに接続した優先駆動用のコントロール弁のロード
センシングポートを、他のコントロール弁と圧油供給回
路との接続回路に設けられ且つ該圧油供給回路の圧力で
開くロジツク弁に接続し、該ロジツク弁を該優先駆動用
のコントロール弁のロードセンシングポートの圧力で閉
弁することを特徴とするロードセンシング形マルチプル
コントロール弁のタンデム回路装置。An actuator is connected to each of a plurality of control valves equipped with a load sensing port, and a common pressure oil supply circuit is connected to each actuator via each control valve, and the actuator to be driven preferentially. Connect the load sensing port of the control valve for priority drive connected to the logic valve that is provided in the connection circuit between the other control valve and the pressure oil supply circuit and opens with the pressure of the pressure oil supply circuit, and connect the load sensing port of the control valve for priority drive connected to the logic valve. A tandem circuit device for a load sensing type multiple control valve, characterized in that the valve is closed by the pressure of a load sensing port of the control valve for preferential driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1349885A JPS61175301A (en) | 1985-01-29 | 1985-01-29 | Tandem circuit device of load sensing-type multiple control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1349885A JPS61175301A (en) | 1985-01-29 | 1985-01-29 | Tandem circuit device of load sensing-type multiple control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61175301A true JPS61175301A (en) | 1986-08-07 |
Family
ID=11834779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1349885A Pending JPS61175301A (en) | 1985-01-29 | 1985-01-29 | Tandem circuit device of load sensing-type multiple control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61175301A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02138506A (en) * | 1988-11-18 | 1990-05-28 | Sanwa Seiki Co Ltd | Branch hydraulic circuit |
| CN104179741A (en) * | 2014-08-08 | 2014-12-03 | 徐州五洋科技股份有限公司 | Load-sensing-controlled hydraulic system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57116965A (en) * | 1980-11-24 | 1982-07-21 | Linde Ag | Hydraulic pressure driving system with variable discharging pump |
| JPS5852082A (en) * | 1981-09-14 | 1983-03-28 | 株式会社日立製作所 | Supporting structure of tank |
-
1985
- 1985-01-29 JP JP1349885A patent/JPS61175301A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57116965A (en) * | 1980-11-24 | 1982-07-21 | Linde Ag | Hydraulic pressure driving system with variable discharging pump |
| JPS5852082A (en) * | 1981-09-14 | 1983-03-28 | 株式会社日立製作所 | Supporting structure of tank |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02138506A (en) * | 1988-11-18 | 1990-05-28 | Sanwa Seiki Co Ltd | Branch hydraulic circuit |
| CN104179741A (en) * | 2014-08-08 | 2014-12-03 | 徐州五洋科技股份有限公司 | Load-sensing-controlled hydraulic system |
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