JPS57190844A - Drag head with contact pressure regulating tank - Google Patents
Drag head with contact pressure regulating tankInfo
- Publication number
- JPS57190844A JPS57190844A JP7343781A JP7343781A JPS57190844A JP S57190844 A JPS57190844 A JP S57190844A JP 7343781 A JP7343781 A JP 7343781A JP 7343781 A JP7343781 A JP 7343781A JP S57190844 A JPS57190844 A JP S57190844A
- Authority
- JP
- Japan
- Prior art keywords
- contact pressure
- drag head
- tank
- ballast water
- drag
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
Abstract
PURPOSE:To regulate a contact pressure of a drag head to a ground and to enhance ratio of earth and sand in sucked mud, by a method wherein a contact pressure regulating tank is installed to a drag head of a dredger, and ballast water in the tank is adjusted. CONSTITUTION:A drag arm is pivotably mounted to a hopper dredger through an universal joint, and a drag head 4 is rotatably secured to the forward end thereof. A contact pressure 8 is located to a rotary part 4b of the drag head 4, a port 9 for implanting and draining liquid and an air vent hole 10 are bored in the tank 8, a fixed pipe 11 and a flexible pipe hose 12, which implant and drain liquid, are installed to the implanting and drainage port 9, and the air vent hole 10 is covered with a blind plug 13. In case a dredging is made on a hard ground, ballast water is implanted into the tank 8 to increase a contact pressure, and in the case of a soft ground, ballast water is drained to reduce the contact pressure through action of buoyancy.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7343781A JPS57190844A (en) | 1981-05-18 | 1981-05-18 | Drag head with contact pressure regulating tank |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7343781A JPS57190844A (en) | 1981-05-18 | 1981-05-18 | Drag head with contact pressure regulating tank |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57190844A true JPS57190844A (en) | 1982-11-24 |
Family
ID=13518214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7343781A Pending JPS57190844A (en) | 1981-05-18 | 1981-05-18 | Drag head with contact pressure regulating tank |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57190844A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6158268U (en) * | 1984-09-18 | 1986-04-19 | ||
AU2005200784B2 (en) * | 2004-02-19 | 2010-12-23 | Dredeco Pty Ltd. | Drag-head and hopper dredger |
US20140137442A1 (en) * | 2011-06-17 | 2014-05-22 | Nautilus Minerals Pacific Pty Ltd | System and method for seafloor stockpiling |
US20140137443A1 (en) * | 2011-06-17 | 2014-05-22 | Nautilus Minerals Pacific Pty Ltd | Apparatus and method for seafloor stockpiling |
US20160186409A1 (en) * | 2012-12-11 | 2016-06-30 | Ihc Holland Ie B.V. | Suction head for a dredger |
CN108708415A (en) * | 2018-04-28 | 2018-10-26 | 广州文冲船厂有限责任公司 | A kind of reamer ground pressure control system |
-
1981
- 1981-05-18 JP JP7343781A patent/JPS57190844A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6158268U (en) * | 1984-09-18 | 1986-04-19 | ||
JPH0316923Y2 (en) * | 1984-09-18 | 1991-04-10 | ||
AU2005200784B2 (en) * | 2004-02-19 | 2010-12-23 | Dredeco Pty Ltd. | Drag-head and hopper dredger |
US20140137442A1 (en) * | 2011-06-17 | 2014-05-22 | Nautilus Minerals Pacific Pty Ltd | System and method for seafloor stockpiling |
US20140137443A1 (en) * | 2011-06-17 | 2014-05-22 | Nautilus Minerals Pacific Pty Ltd | Apparatus and method for seafloor stockpiling |
US9957694B2 (en) * | 2011-06-17 | 2018-05-01 | Eda Kopa (Solwara) Limited | System and method for seafloor stockpiling |
US20160186409A1 (en) * | 2012-12-11 | 2016-06-30 | Ihc Holland Ie B.V. | Suction head for a dredger |
CN108708415A (en) * | 2018-04-28 | 2018-10-26 | 广州文冲船厂有限责任公司 | A kind of reamer ground pressure control system |
CN108708415B (en) * | 2018-04-28 | 2021-03-02 | 广州文冲船厂有限责任公司 | Reamer ground pressure control system |
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