JPH01136592U - - Google Patents
Info
- Publication number
- JPH01136592U JPH01136592U JP2412388U JP2412388U JPH01136592U JP H01136592 U JPH01136592 U JP H01136592U JP 2412388 U JP2412388 U JP 2412388U JP 2412388 U JP2412388 U JP 2412388U JP H01136592 U JPH01136592 U JP H01136592U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- switching valve
- propulsion jack
- side liquid
- propulsion
- 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
- 230000002265 prevention Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims 8
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案の一実施例の説明図、第２図は
本考案が適用される制御装置のブロツク図、第３
図は従来例例の説明図である。
図中１はタンク、２は油圧ポンプ、３は管路、
４は主切換弁、５，６，７ａ，７ｂは管路、８ａ
，８ｂは推進ジヤツキ側切換弁、９ａ，９ｂは管
路、１０ａ，１０ｂは推進ジヤツキ、１１は管路
、１２ａ，１２ｂは管路、１３は無負荷追従バル
ブブロツク、１４は切換弁、１５は減圧弁、１６
は流路、１８，１９ａ，１９ｂは管路、２２ａ，
２２ｂはヘツド側油室、２３ａ，２３ｂはロツド
側油室、２７は安全弁、２８はシールド後退防止
圧制御バルブブロツク、２９ａ，２９ｂはノンリ
ーク弁を示す。
Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is a block diagram of a control device to which the present invention is applied, and Fig. 3 is a block diagram of a control device to which the present invention is applied.
The figure is an explanatory diagram of a conventional example. In the figure, 1 is a tank, 2 is a hydraulic pump, 3 is a pipe,
4 is the main switching valve, 5, 6, 7a, 7b are pipelines, 8a
, 8b is a propulsion jack side switching valve, 9a, 9b are pipes, 10a, 10b are propulsion jacks, 11 is a pipe, 12a, 12b are pipes, 13 is a no-load following valve block, 14 is a switching valve, 15 is a Pressure reducing valve, 16
is a flow path, 18, 19a, 19b are pipes, 22a,
22b is a head side oil chamber, 23a and 23b are rod side oil chambers, 27 is a safety valve, 28 is a shield backback prevention pressure control valve block, and 29a and 29b are non-leak valves.
Claims (1)
側液室或いはロツド側液室へ主切換弁及び推進ジ
ヤツキ側切換弁を介して液を送給し得るようにし
た液圧ポンプと、前記主切換弁及び推進ジヤツキ
側切換弁を結ぶ管路の中途部に接続され無負荷追
従運転される推進ジヤツキのヘツド側液室へ液圧
ポンプからの液を減圧して送り得るよう切換弁及
び減圧弁を備えると共に無負荷追従運転をしてい
る推進ジヤツキのヘツド側液室に地山から反力が
かかつた場合に液をタンクへ戻す安全弁を備えた
無負荷追従バルブブロツクと、該無負荷追従バル
ブブロツクと前記推進ジヤツキ側切換弁及び推進
ジヤツキヘツド側液室を結ぶ管路との間に配設さ
れた、ノンリーク弁を備えたシールド後退防止圧
制御バルブブロツクを設けたことを特徴とするシ
ールド掘進機自動方向制御装置の液圧回路。 A hydraulic pump capable of supplying liquid to the head side liquid chambers or rod side liquid chambers of a plurality of propulsion jacks arranged in parallel via a main switching valve and a propulsion jack side switching valve, and the main switching valve. A switching valve and a pressure reducing valve are provided so that the liquid from the hydraulic pump can be reduced in pressure and sent to the head side liquid chamber of the propulsion jack which is connected to the middle part of the pipe connecting the propulsion jack side switching valve and is operated under no load. and a no-load follow-up valve block equipped with a safety valve that returns liquid to the tank when a reaction force from the earth is applied to the head-side liquid chamber of a propulsion jack that is in no-load follow-up operation, and the no-load follow-up valve block. and a pipeline connecting the propulsion jack side switching valve and the propulsion jack head side liquid chamber, and a shield retreat prevention pressure control valve block equipped with a non-leak valve is provided. Hydraulic circuit of directional control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2412388U JPH0542155Y2 (en) | 1988-02-25 | 1988-02-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2412388U JPH0542155Y2 (en) | 1988-02-25 | 1988-02-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01136592U true JPH01136592U (en) | 1989-09-19 |
| JPH0542155Y2 JPH0542155Y2 (en) | 1993-10-25 |
Family
ID=31243699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2412388U Expired - Lifetime JPH0542155Y2 (en) | 1988-02-25 | 1988-02-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0542155Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03191197A (en) * | 1989-12-20 | 1991-08-21 | Tokimec Inc | Automatic directional controller for shielding excavator |
| JPH04126995U (en) * | 1991-05-01 | 1992-11-19 | 株式会社小松製作所 | Buckling prevention device for shield tunneling machines |
-
1988
- 1988-02-25 JP JP2412388U patent/JPH0542155Y2/ja not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03191197A (en) * | 1989-12-20 | 1991-08-21 | Tokimec Inc | Automatic directional controller for shielding excavator |
| JPH04126995U (en) * | 1991-05-01 | 1992-11-19 | 株式会社小松製作所 | Buckling prevention device for shield tunneling machines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0542155Y2 (en) | 1993-10-25 |
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