JPH0342894U - - Google Patents
Info
- Publication number
- JPH0342894U JPH0342894U JP10369389U JP10369389U JPH0342894U JP H0342894 U JPH0342894 U JP H0342894U JP 10369389 U JP10369389 U JP 10369389U JP 10369389 U JP10369389 U JP 10369389U JP H0342894 U JPH0342894 U JP H0342894U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- propulsion
- valves
- liquid
- jacks
- 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
- Excavating Of Shafts Or Tunnels (AREA)
Description
第１図は本考案の一実施例の回路図、第２図な
いし第４図は切換状態を示す回路図、第５図は本
考案の他の実施例の回路図、第６図は従来例の回
路図である。
図中、１……タンク、２……液圧ポンプ、４…
…主切換弁、６……管路、８ａ，８ｂ……推進ジ
ヤツキ側切換弁、１０ａ，１０ｂ……推進ジヤツ
キ、１３……無負荷追従バルブブロツク、１４…
…切換弁、１５……減圧弁、１７，１７ａ，１７
ｂ……逆止弁、２２ａ，２２ｂ……ヘツド側液室
、２３ａ，２３ｂ……ロツド側液室、２７ａ，２
７ｂ……パイロツトチエツク弁、２８……減圧弁
、２９……安全弁を示す。
Figure 1 is a circuit diagram of one embodiment of the present invention, Figures 2 to 4 are circuit diagrams showing switching states, Figure 5 is a circuit diagram of another embodiment of the present invention, and Figure 6 is a conventional example. FIG. In the figure, 1...tank, 2...hydraulic pump, 4...
...Main switching valve, 6...Pipe line, 8a, 8b...Propulsion jack side switching valve, 10a, 10b...Propulsion jack, 13...No-load following valve block, 14...
...Switching valve, 15...Pressure reducing valve, 17, 17a, 17
b...Check valve, 22a, 22b...Head side liquid chamber, 23a, 23b...Rod side liquid chamber, 27a, 2
7b... pilot check valve, 28... pressure reducing valve, 29... safety valve.
Claims (1)
１０ｂと、タンク１の液を吸引し加圧して送出す
る液圧ポンプ２と、推進ジヤツキ後退防止用のパ
イロツトチエツク弁２７ａ，２７ｂと、該パイロ
ツトチエツク弁２７ａ，２７ｂのパイロツト室に
液を給排して該パイロツトチエツク弁２７ａ，２
７ｂを開閉すると共に該パイロツトチエツク弁２
７ａ，２７ｂを介して前記推進ジヤツキ１０ａ，
１０ｂのヘツド側液室２２ａ，２２ｂへ液を給排
する推進ジヤツキ側切換弁８ａ，８ｂと、該推進
ジヤツキ側切換弁８ａ，８ｂと前記推進ジヤツキ
１０ａ，１０ｂのロツド側液室２３ａ，２３ｂと
のうちの一方に前記液圧ポンプ２からの液を送給
し他方をタンク１に接続する主切換弁４と、該主
切換弁４と前記推進ジヤツキ側切換弁８ａ，８ｂ
とを結ぶ管路６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１０ａ，１０ｂのヘツド側
液室２２ａ，２２ｂへ前記液圧ポンプ２からの液
を減圧して送給し得る切換弁１４及び減圧弁１５
を有すると共に推進ジヤツキ１０ａ，１０ｂのヘ
ツド側液室２２ａ，２２ｂから前記減圧弁１５へ
の液の逆流を防ぐ逆止弁１７ａ，１７ｂを有する
無負荷追従バルブブロツク１３と、無負荷運転さ
れる推進ジヤツキ１０ａ，１０ｂのヘツド側液室
２２ａ，２２ｂに接続されているパイロツトチエ
ツク弁２７ａ，２７ｂのパイロツト室に前記推進
ジヤツキ側切換弁８ａ，８ｂを介して連通する安
全弁２９と、前記推進ジヤツキ１０ａ，１０ｂの
ロツド側液室２３ａ，２３ｂと前記推進ジヤツキ
側切換弁８ａ，８ｂ及び安全弁２９との間に設け
た減圧弁２８とを備え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 plurality of propulsion jacks 10a arranged in parallel,
10b, a hydraulic pump 2 that sucks liquid in the tank 1, pressurizes it, and sends it out; pilot check valves 27a, 27b for preventing the propulsion jack from retreating; The pilot check valves 27a, 2
7b and the pilot check valve 2.
The propulsion jack 10a, via 7a, 27b.
Propulsion jack side switching valves 8a, 8b supplying and discharging liquid to and from head side liquid chambers 22a, 22b of 10b, and rod side liquid chambers 23a, 23b of said propulsion jacks 10a, 10b. A main switching valve 4 that supplies liquid from the hydraulic pump 2 to one of the valves and connects the other to the tank 1, and the main switching valve 4 and the propulsion jack side switching valves 8a, 8b.
a switching valve that is connected to the midway part of the pipe 6 connecting the pumps and can reduce the pressure and feed the liquid from the hydraulic pump 2 to the head side liquid chambers 22a and 22b of the propulsion jacks 10a and 10b which are operated in a no-load follow-up operation. 14 and pressure reducing valve 15
and a no-load follow-up valve block 13 having check valves 17a, 17b which prevent backflow of liquid from the head-side liquid chambers 22a, 22b of the propulsion jacks 10a, 10b to the pressure reducing valve 15, and a propulsion valve block 13 which is operated without load. A safety valve 29 communicates with the pilot chambers of the pilot check valves 27a, 27b connected to the head side liquid chambers 22a, 22b of the jacks 10a, 10b via the propulsion jack side switching valves 8a, 8b; 10b, a pressure reducing valve 28 provided between the rod side liquid chambers 23a, 23b, the propulsion jack side switching valves 8a, 8b, and the safety valve 29. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10369389U JPH078633Y2 (en) | 1989-09-04 | 1989-09-04 | Hydraulic circuit of shield machine automatic direction control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10369389U JPH078633Y2 (en) | 1989-09-04 | 1989-09-04 | Hydraulic circuit of shield machine automatic direction control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342894U true JPH0342894U (en) | 1991-04-23 |
| JPH078633Y2 JPH078633Y2 (en) | 1995-03-01 |
Family
ID=31652516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10369389U Expired - Fee Related JPH078633Y2 (en) | 1989-09-04 | 1989-09-04 | Hydraulic circuit of shield machine automatic direction control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH078633Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009292532A (en) * | 2008-06-09 | 2009-12-17 | Nara Machi Nagaya Co Ltd | Packaging bag |
-
1989
- 1989-09-04 JP JP10369389U patent/JPH078633Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009292532A (en) * | 2008-06-09 | 2009-12-17 | Nara Machi Nagaya Co Ltd | Packaging bag |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH078633Y2 (en) | 1995-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0175165U (en) | ||
| JPS6386385U (en) | ||
| JPS6455306U (en) | ||
| JPH01136592U (en) | ||
| JPS627680Y2 (en) | ||
| JPH0280699U (en) | ||
| JPH0269101U (en) | ||
| JPS636160Y2 (en) | ||
| SU1486466A1 (en) | HYDRAULIC DRIVE OF THE CROSS-CUTTING CRANE | |
| JPS61194801U (en) | ||
| JPS6386404U (en) | ||
| JPS61109922U (en) | ||
| JPS6154062U (en) | ||
| JPS6188636U (en) | ||
| RU1827451C (en) | Hydraulic drive of telescopic mast | |
| JPH0343163U (en) | ||
| JPS63176139U (en) | ||
| JPS63195106U (en) | ||
| JPS6164937U (en) | ||
| JPS6238973U (en) | ||
| JPH03118175U (en) | ||
| JPH01111694U (en) | ||
| JPS6153298U (en) | ||
| JPS6343897U (en) | ||
| JPS6413905U (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |