JPH027378U - - Google Patents

Info

Publication number
JPH027378U
JPH027378U JP8656188U JP8656188U JPH027378U JP H027378 U JPH027378 U JP H027378U JP 8656188 U JP8656188 U JP 8656188U JP 8656188 U JP8656188 U JP 8656188U JP H027378 U JPH027378 U JP H027378U
Authority
JP
Japan
Prior art keywords
oil pump
tilting
servo valve
main pipe
pressure switch
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
JP8656188U
Other languages
Japanese (ja)
Other versions
JP2511470Y2 (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 JP1988086561U priority Critical patent/JP2511470Y2/en
Publication of JPH027378U publication Critical patent/JPH027378U/ja
Application granted granted Critical
Publication of JP2511470Y2 publication Critical patent/JP2511470Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Reciprocating Pumps (AREA)

Description

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

第１図は本考案の実施例を示す概略図、第２図
は本考案により得られるポンプ吐出圧―吐出量特
性図、第３図は従来例を示す概略図である。 １，２……主油圧シリンダ、６，７……主管路
、８……両傾転油ポンプ、１９……サーボバルブ
、２０……操作レバー、２１……ポテンシヨメー
タ、２３……差動トランス、２７……圧力スイツ
チ。 FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIG. 2 is a pump discharge pressure-discharge rate characteristic diagram obtained by the present invention, and FIG. 3 is a schematic diagram showing a conventional example. 1, 2... Main hydraulic cylinder, 6, 7... Main pipe line, 8... Double tilting oil pump, 19... Servo valve, 20... Operating lever, 21... Potentiometer, 23... Differential Transformer, 27...Pressure switch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ２本のコンクリートシリンダを作動させる２本
の主油圧シリンダに主管路を介して両傾転油ポン
プを接続し、該油ポンプの傾転方向、傾転量をサ
ーボバルブで変化させるようにすると共に、操作
レバーに付けたポテンシヨメータの出力に対応し
て油ポンプの傾転調整をするよう該ポテンシヨメ
ータとサーボバルブとを接続し、且つ油ポンプの
傾転位置を差動トランスで検知して上記サーボバ
ルブへフイードバツクさせるようにし、更に、上
記主管路に吐出圧力が高くなると作動する圧力ス
イツチを設けて、該圧力スイツチでサーボバルブ
のサーボ位置を制御できるようにしてなることを
特徴とするコンクリートポンプにおける油ポンプ
吐出量制御装置。 A double tilting oil pump is connected to the two main hydraulic cylinders that operate the two concrete cylinders via a main pipe, and the tilting direction and amount of the oil pump are changed by a servo valve. , the potentiometer attached to the operating lever is connected to a servo valve so as to adjust the tilting of the oil pump according to the output thereof, and the tilting position of the oil pump is detected by a differential transformer. The main pipe is further provided with a pressure switch that is activated when the discharge pressure increases, so that the servo position of the servo valve can be controlled by the pressure switch. Oil pump discharge amount control device for concrete pumps.
JP1988086561U 1988-06-29 1988-06-29 Oil pump discharge rate control device for concrete pump Expired - Lifetime JP2511470Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988086561U JP2511470Y2 (en) 1988-06-29 1988-06-29 Oil pump discharge rate control device for concrete pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988086561U JP2511470Y2 (en) 1988-06-29 1988-06-29 Oil pump discharge rate control device for concrete pump

Publications (2)

Publication Number Publication Date
JPH027378U true JPH027378U (en) 1990-01-18
JP2511470Y2 JP2511470Y2 (en) 1996-09-25

Family

ID=31311200

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988086561U Expired - Lifetime JP2511470Y2 (en) 1988-06-29 1988-06-29 Oil pump discharge rate control device for concrete pump

Country Status (1)

Country Link
JP (1) JP2511470Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005139904A (en) * 2003-11-04 2005-06-02 Ishikawajima Constr Mach Co Device for controlling capacity range of oil pump in concrete pump

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538454A (en) * 1978-09-11 1980-03-17 Mitsui Eng & Shipbuild Co Ltd Multi-tube type heat exchanger
JPS5877157U (en) * 1981-11-19 1983-05-25 石川島播磨重工業株式会社 Concrete pump operation control device
JPS6182075U (en) * 1984-11-01 1986-05-30

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5538454A (en) * 1978-09-11 1980-03-17 Mitsui Eng & Shipbuild Co Ltd Multi-tube type heat exchanger
JPS5877157U (en) * 1981-11-19 1983-05-25 石川島播磨重工業株式会社 Concrete pump operation control device
JPS6182075U (en) * 1984-11-01 1986-05-30

Also Published As

Publication number Publication date
JP2511470Y2 (en) 1996-09-25

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