JPS60188257U - Hydraulic closed circuit safety circuit - Google Patents
Hydraulic closed circuit safety circuitInfo
- Publication number
- JPS60188257U JPS60188257U JP7611784U JP7611784U JPS60188257U JP S60188257 U JPS60188257 U JP S60188257U JP 7611784 U JP7611784 U JP 7611784U JP 7611784 U JP7611784 U JP 7611784U JP S60188257 U JPS60188257 U JP S60188257U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- relief valve
- oil tank
- hydraulic
- closed circuit
- 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
Links
Landscapes
- Control Of Fluid Gearings (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の油圧閉回路を示す図、第２図は本考案に
よる保安回路を含む油圧閉回路を示す図、第３図は保安
回路における油圧シリンダの作動説明図である。
符号の説明、２・・・両方向可変容量形の油圧ポンプ、
３・・・可逆油圧モータ、４，５・・・管路、６゜７、
８．９． １０・・・油圧ポンプ、リリーフ弁、フィ
ルタ、チェック弁（油補給装置）、２０・・・リリーフ
弁、２０ａ・・・アウトレットポート、２０ｂ・・・ベ
ントポート、２２，２４・・・チェック弁、２６・・・
チェック弁とアウトレットポート間から分岐した管路、
３０・・・単動油圧シリンダ、３２・・・流量調整弁（
流量制御弁）、３３・・・油圧タンク、３６・・・ベン
ト管路、３７・・・メカニカルシャットオフ弁。
＼−ノ ｌｒ
第２図FIG. 1 is a diagram showing a conventional hydraulic closed circuit, FIG. 2 is a diagram showing a hydraulic closed circuit including a safety circuit according to the present invention, and FIG. 3 is an explanatory diagram of the operation of a hydraulic cylinder in the safety circuit. Explanation of symbols, 2... Bidirectional variable displacement hydraulic pump,
3... Reversible hydraulic motor, 4, 5... Pipeline, 6°7,
8.9. 10... Hydraulic pump, relief valve, filter, check valve (oil supply device), 20... Relief valve, 20a... Outlet port, 20b... Vent port, 22, 24... Check valve, 26...
A pipe line branching from the check valve and outlet port,
30...Single-acting hydraulic cylinder, 32...Flow rate adjustment valve (
flow rate control valve), 33...hydraulic tank, 36...vent pipe line, 37...mechanical shutoff valve. ＼－ノ lr Figure 2
Claims (1)
した閉回路に油補給装置を並列に接続し、また前記可逆
油圧モータと並列にリリーフ弁を接続して構成した油圧
閉回路において、前記リリーフ弁としてバランスピスト
ン形のリリーフ弁を採用し、このリリーフ弁のアウトレ
ットポート側に該アウトレットポートへの流れを阻止す
るチェック弁を設け、このチェック弁と前記アウトレッ
トポート間から分岐した管路に単動油圧シリンダを接続
するとともに流量制御弁を介して油タンクを接続し１ま
た前記リリーフ弁のベントポートと油タンクを接続する
ベント管路にメカニカルシャットオフ弁を介装して、前
記油圧シリンダが所定量作動したとき該油圧シリンダに
よって前記メ゛ カニカルシャットオフ弁が操作されて
前記リリーフ弁のベントポートが油タンクに連通ずるよ
うにした保安回路。In a hydraulic closed circuit configured by connecting an oil supply device in parallel to a closed circuit in which a bidirectional variable displacement hydraulic pump and a reversible hydraulic motor are connected, and a relief valve connected in parallel to the reversible hydraulic motor, the relief valve A balanced piston-type relief valve is used as the valve, and a check valve is installed on the outlet port side of this relief valve to block the flow to the outlet port. A mechanical shut-off valve is interposed in the vent pipe connecting the oil tank and the vent port of the relief valve to connect the cylinder and an oil tank via a flow rate control valve. The safety circuit is configured such that, when activated, the main canonical shutoff valve is operated by the hydraulic cylinder so that a vent port of the relief valve communicates with an oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7611784U JPS60188257U (en) | 1984-05-23 | 1984-05-23 | Hydraulic closed circuit safety circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7611784U JPS60188257U (en) | 1984-05-23 | 1984-05-23 | Hydraulic closed circuit safety circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60188257U true JPS60188257U (en) | 1985-12-13 |
| JPS6244195Y2 JPS6244195Y2 (en) | 1987-11-19 |
Family
ID=30617963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7611784U Granted JPS60188257U (en) | 1984-05-23 | 1984-05-23 | Hydraulic closed circuit safety circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60188257U (en) |
-
1984
- 1984-05-23 JP JP7611784U patent/JPS60188257U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6244195Y2 (en) | 1987-11-19 |
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