US3673716A - Compressed air operated apparatus for raising underwater deposits - Google Patents
Compressed air operated apparatus for raising underwater deposits Download PDFInfo
- Publication number
- US3673716A US3673716A US859872A US3673716DA US3673716A US 3673716 A US3673716 A US 3673716A US 859872 A US859872 A US 859872A US 3673716D A US3673716D A US 3673716DA US 3673716 A US3673716 A US 3673716A
- Authority
- US
- United States
- Prior art keywords
- pipe
- dredge pipe
- compressed air
- dredge
- annular
- 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.)
- Expired - Lifetime
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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
- E02F3/9243—Passive suction heads with no mechanical cutting means
- E02F3/925—Passive suction heads with no mechanical cutting means with jets
-
- 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
- E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
- E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
- E02F3/9231—Suction wheels with axis of rotation parallel to longitudinal axis of the suction pipe
Definitions
- This invention relates to a method of raising deposits, especially gravel and the like, using a pressure medium, especially by means of compressed air, the material to be raised being conveyed via a dredge pipe from the deposit to a separator in which the material raised is separated from the pressure medium and possibly from entrained portions of a liquid medium disposed above the deposit, the pressure medium being introduced at the lower end of the dredge pipe into the latter in such a manner that a partial vacuum is produced under the effect of which the material to be raised enters the dredge pipe.
- the invention further relates to an apparatus for carrying out this method.
- the method according to the invention has the advantage that the material is removed not only from the base but also from the wall of the deposit, a cavity being formed in the wall by removal of material therefrom and material slipping down as a result.
- This method is particularly advantageous when raising gravel from water-filled gravel pits.
- it may be advantageous firstly to arrange the axis of the lower dredge pipe end substantially perpendicular to the surface of the deposit by the tension means and secondly to hold the inlet opening of the dredge pipe at a predetermined substantially constant distance from the deposit, which is preferably substantially equal to l to l 5 times the diameter of the inlet opening of the dredge pipe.
- the loosening and removal of the material may be substantially promoted by cutting tools which preferably rotate concentrically to the inlet opening of the dredge pipe.
- the pressure medium is introduced according to the invention into the dredge pipe with a rotational component.
- the rotation of the pressure medium effects a turbulence in the region in front of the inlet opening of the dredge pipe which whirls up the deposit in this region.
- the pressure medium is made to rotate about the dredge pipe axis.
- the pressure medium is advantageously supplied at the inlet end of the dredge pipe in the form of a flow which is of annular cross-section, moves along the inner surface of the dredge pipe and is substantially uniformly distributed over the periphery.
- lt may be advantageous to subdivide the pressure medium flow in the peripheral direction to obtain a more uniform bubble formation.
- the pressure medium may be guided in the injection nozzle by guide fins extending in the direction of flow to ensure a supply uniformly distributed over the periphery.
- a floating free of the inlet opening of the dredge pipe may be effected in that pressure medium is conducted preferably intermittently against the conveying direction.
- the dredge pipe is connected preferably in the upper region of the conduits via a connecting conduit which may be shut off by means of a valve to the pressure medium conduit.
- a shut-off valve is provided in the dredge pipe above the opening of the connecting conduit and in the pressure medium conduit below the opening of the connecting conduit. Normally, the valve in the connecting conduit is closed whereas the valves in the dredge pipe and in the pressure medium conduit are normally open. If the pressure medium is to be diverted to the lower end of the dredge pipe, the valve in the connecting conduit is opened and the two other valves closed. 7
- an apparatus may be used in which there is provided at the lower end of a dredge pipe a suction head at whose inlet end is introduced a pressure medium to produce a partial vacuum, said apparatus being characterized in that to introduce the pres sure medium an annular nonle provided with preferably helically wound fins imparting a rotational component to the compressed air is used.
- the dredge pipe may be surrounded by an outer pipe concentric with the axis thereof in such a manner that an annular space is left between the two pipes which is used as supply conduit for the pressure medium used for the dredging.
- the suction head may comprise an inclined roof which deflects material falling onto the suction head and facilitates withdrawal or freeing of the latter when buried under fallen material.
- the apparatus may be provided with cutting tools mounted rotatably concentrically with the dredge pipe axis and according to the invention to drive the cutting tools two or more hydraulic motors are used which are disposed symmetrically to the dredge pipe axis and distributed uniformly over the periphery and are preferably reversible in their directions of rotation.
- the symmetrical arrangement obviates asymmetrical loads and reduces the sealing and bearing problems.
- the drive and bearing of the cutting tools are preferably arranged in a substantially fluid-tight chamber which according to the invention is filled with a medium under pressure, thus reducing the danger of penetration of dirt, water or the like.
- the chamber including the drive and bearings of the cutting tools may be connected to the supply conduit of the pressure medium used for the dredging, preferably by a controllable valve.
- the controllable valve is constructed as a non-retum or check valve so that it closes as soon as the excess pressure of the pressure medium in the supply conduit decreases. This valve arrangement assures that the pressure in the housing enclosing the motors is maintained even after the pressure in the supply conduit is decreased. It is also possible to ensure by a float control that when using compressed air as pressure medium the valve closes as soon as water enters the compressed air line.
- the supply conduits for the hydraulic fluid serving to drive the hydraulic motors are preferably arranged in the intermediate space between the dredge pipe and outer pipe, thus being protected against damage.
- the dredge pipe With resilient intermediate members.
- flexible support elements preferably cables, may be provided.
- the resilient intermediate members prevent breakage or damage of the pipe in rough weather or by falling material. Moreover, they make it possible to incline the suction head or the lower portion of the pipe together with the suction head with respect to the rest of the pipe, so that the suction head may be brought more easily into the optimum working position.
- the suction head and the individual pipe sections may be secured to the flexible support elements, the resilient intermediate members thus being completely or partially free from tensile stresses.
- the cutting tools may be so arranged that they partially cover the inlet opening of the suction head, thus preventing larger objects, such as stones, wood or the like, from becoming lodged in front of the inlet opening of the suction head and clogging the latter.
- the cutting tools may be mounted on support ribs which extend with their one end substantially to the edge of the inlet opening of the suction head, a tooth-like cutting tool extending in each case from said end of the support ribs at about 30 to the dredgepipe axis downwardly towards the center of the suction head opening in such a manner that the distances between the free ends of said cutting tools are considerably smaller-than the internal diameter of the dredge pipe.
- the supply of pressure medium can thus be adapted to different operating conditions.
- FIG. 1 is a side.elevation of a section dredger carried by a floating raft and having a compressed air suction head in a water-filledgravel pit, 7
- FIG. 2 is a longitudinal section through a suction head
- FIG. 3 is a perspective view of thelower end of the dredge pipe to an enlarged scale
- H FIG. v4 is a view of a modified embodiment of the pipe having resilient intermediate pipe members or sections.
- FIG. 1 shows a floating suction dredger in a water-filled gravel pit.
- a suction head 1 is formed at the lower end of a double-walled pipe which is assembled-from pipe sections 3 Y and which issecured at its upper end so that it may be pivoted, raised and lowered on a raft or ship denoted generally by 2.
- the sections 3 of the pipe each consist of an outer support pipe 10 and an inner conveying or dredge pipe 11.
- the pipe sections are joined together at the ends by means of flanges 12 so thatthey form a uniform double-walled pipe.
- the sections of the flanges .12 joining the outer support pipel to the inner dredge pipe 11 comprise openings 13 such that compressed air9 may be led downwardly between the outer support pipe 10 and the inner dredge pipe 11.
- the suction head 1 At its lower end the suction head 1 comprises an annular mouthpiece 4 of substantially U- shaped cross-section, the inner wall 4' forming a slightly funnel-shaped inlet to the dredge pipe 11 having a cylindrical inner surface portion which comprises substantially the same internal diameter as the dredge pipe 11 in order to avoid any undesirable turbulence of the aspired mixture of material and water due to the free upper edge of the mouthpiece.
- the upper end of theouter wall 4" of the mouthpiece 4 is screwed onto the lower end of the support pipe by means of a thread 5'.
- the dredge pipe 11 carries at its lower end an air guide ring 7which widens conically downwardly and extends into the inner annular chamber of the mouthpiece 4, thus forming between the air guide ring 7 and the inner wall 4' of the mouthpiece 4 anannular nozzle 8 which tapers upwardly.
- the air guide ring 7 is provided at its inner side with curved and/or inclined air guide fins'6 which set the compressed air blown into the dredge pipe 11. into a rotational movement about the axis of thedredge pipe.
- a two-part ring 15, is rotatably mounted on two roller bearings 14 and 14' mounted on the support pipe 10 so that a cuttingdevice provided with teeth 54 to 58 can rotate about the lower end of the support pipe 10 and the mouthpiece 4 connectedthereto.
- the ring 15 is connected at its upper end face detachably to a flange :16 which isconnected in turn detachably to an internally toothed rim l7.
- Said toothed-rim 17 is set in rotary motion via pinions l8 and 19 by two or three hydraulic motors 20 and 21 serving to drive the cutting device and arranged symmetrically to the axis of the dredge pipe offset Ito I20cir cumferentially.
- Hydraulic fluid conduits 22 and 23 leading to the hydraulic motors 20 and 21 are arranged in the intermediate space between the outer support pipe 10 and the inner dredge pipe 11 in which the compressed air 9 flows downwardly and extend through the openings 13.
- These hydraulic fluid conduits 22 and 23 are divided in sections which correspond in length to the length of the pipe sections 10 and which are detachably connected together substantially in the region of the flanges 12.
- Resilient intermediate members may be provided at the ends of the conduits 22 and 23.
- the two hydraulic motors 20 and 21 are surrounded by a housing 24 which forms in its upper region an inclined roof.
- the lower end of the housing 24 is held in its position concentrically to the dredge pipe by a centering plate 33.
- the inclined roof 24 serves to facilitate extraction or freeing of the suction head when the latter is buried under falling material, such as grave] or the like.
- the two hydraulic motors 20 and 21 are secured in a mounting plate 34 and the seat of each motor in the mounting plate must be sealed so that no water or dirt can penetrate into the inner chamber 26. Disposed in this inner chamber 26 are the two roller bearings 14 and 14 and the internal teeth of the internally toothed rim 17 as well as the two pinions 18 and 19.
- the inner chamber 26 is closed at its upper end by the mounting plate 34 fixedly connected to the outer support pipe 10.
- a radial sealing ring 28 which prevents water or dirt penetrating into theinner chamber 26. Furthermore, two slip sealing rings 29 and 30 are provided above this radial seal 28. At its lower end the inner chamber 26 is sealed beneath the roller bearings l4, 14 by a radial sealing ring 27. Inserted in the outer support pipe 10 is .a valve, preferably a check valve 31, by which compressed air may be introduced into the inner chamber 26 to produce an excess pressure preventing the entry of water, sand, dirt or the like and supporting the effect of the seals. An excess pressure may be produced in analogous manner'by means of a check valve 31 in the inside of the housing 24.
- the suction head comprises cutting tools which consist of teeth 54 to 58 mounted on four support ribs 50 arranged offset by The support ribs are connected by means of screws 53 to the bearing ring 15and the flange 16.
- the support ribs 50 comprise in the upper region a portion 51 extending outwardly and in the lower region a portion 52 extending radially inwardly.
- a tooth 54 extends substantially radially from each support rib 50, two teeth 55 and 56 extend obliquely downwardly at an angle of about 60 to the suction head axis, one tooth 57 extends vertically downwardly and one tooth 58 is inwardly inclined at about 30 to 45 to the suction head axis.
- the teeth 58 mounted at the inner ends of the portions 52 are very effective in preventing larger stones, wood or the like becoming lodged in front of the inlet opening of the suction head and clogging said opening.
- the profile of the teeth 54 to 58 is shown in FIG. 2, in which the rear tooth 58 is indicated in dashed line.
- the inlet opening of the suction pipe is advantageously about 20 cm above the material to be raised and is substantially perpendicular to thesurface thereof.
- a cable 44 (FIG. 1) secured to the suction head 1 and wound on a winch 46 atthe end of the raft 2 adjacent the sloping wall of the gravel pit, the inlet end of the dredge pipe may be held closely against the sloping wall of the deposit.
- the outwardly extending teeth 54 to 56 can loosen material from the sloping wall of the deposit.
- the hydraulic motors 20 and 21 drive the cutting tools so that they rotate about the inlet opening. The teeth 54 to 58 thus loosen the deposit.
- Compressed air is blown substantially in the conveying direction into the lower end of the dredge pipe 1 1 through the annular nozzle 8 at a pressure which is higher than the static pressure of the water obtaining in this depth.
- This produces a suction which aspires the material to be raised mixed with water and conveys it upwardly.
- the air guide fins 6 and 6' arranged in the nozzle 8 and externally on the air guide ring 7 impart to the compressed air a rotational movement about the axis of the dredge pipe before injection into the latter.
- This produces a swirling movement the surprising effect of which is that the various constituents of the deposit, for example stones of various sizes and sand of various granulations, are raised unsegregated, i.e.
- the mixture of material water and air is fed to a separator where the material is separated from the compressed air and the water.
- the material may then be conveyed via conveyor belts into ships or onto land.
- the dredge pipe is preferably provided with resilient intermediate members which are inserted between the pipe sections 3 substantially at intervals of 12 to 15 m to avoid breakage of the pipe 3 in rough weather and on collapse of the material wall.
- FIG. 4 shows a resilient intermediate member 36 inserted directly above the suction head 1 and another intermediate member 36' inserted in the pipe further up.
- Two support cables 38 are provided to carry the suction head, the resilient intermediate members 36 and 36' thus being partially freed from the tensile stress. Fitted to the flanges of the resilient intermediate members are radially projecting eyes 42 through which the cables 38 are led.
- eyes 42 may be so designed that the cable is fixedly clamped therein. This latter construction of the eyes 42 affords the advantage that all the resilient intermediate members 36 and 36' are completely free from the tensile stress due to the weight of the pipe. Screws or wedges may be used to clamp the cable 38 in the eyes 42.
- Valves are provided at the upper end of the pipe and make it possible to conduct the compressed air 9 through the dredge pipe 11 downwardly to float the inlet opening of the suction head 1 free or to remove blockages in the dredge pipe 11. These valves may be actuated in such a manner that the compressed air is led intermittently or in pulse manner through the dredge pipe.
- An apparatus operated by compressed air for raising deposits of gravel or the like from beneath bodies of water comprising a dredge pipe which is open at its extreme lower end and is immersible into water, a suction head attached to the lower portion of the dredge pipe, cutting tools surrounding said suction head and being rotatably attached thereto, motor means for driving said cutting tools, and an annular nozzle located at the lower end of said suction head for directing a supply of compressed air into the interior of the dredge pipe, wherein said annular nozzle is provided with inclined air guide fins, said dredge pipe being surrounded by a supporting pipe, the annular space between the two pipes serving as a conduit for the compressed air supplied to the annular nozzle, characterized in that each of both the supporting pipe and the dredge pipe include a plurality of sections, a respective section of the dredge pipe and respective section of the supporting pipe being connected to one another by common flanges at each end thereof, said flanges being connectable to the respective common flange of
- motor means comprises two hydraulic motors, said motors being supplied with hydraulic fluid through conduits arranged in said annular spaces.
- annular nozzle includes an air guide ring attached to the end portion of the dredge pipe and an annular mouthpiece adjustably mounted for axial movement on the end portion of the supporting pipe, said air guide ring being shaped like the surface of the frustrum of a cone and widening in the downward direction to extend into said annular mouthpiece, whereby adjustment of said mouthpiece varies the opening of said annular nozzle.
- An apparatus characterized in that the outer surface of said air guide ring includes guide tins attached to the outer surface of said air guide ring.
- An apparatus characterized in that the upper portion of said air guide ring has a diameter corresponding to the diameter of said dredge pipe and in that said upper portion is rigidly and sealingly attached to the bottom of said dredge pipe to form a funnel inlet for the admission of compressed air into the dredge pipe end opening.
- annular mouthpiece has an approximately U-shaped cross section with the open end extending upwardly for acceptance of said guide ring and the outer leg of the U being threadably attached to the supporting pipe.
- An apparatus characterized in that some of said cutting tools are arranged below the bottom most portions of said mouthpiece.
- An apparatus including means to intermittently force compressed air downwardly through the dredge pipe against the dredging direction for cleaning the lower opening.
- An apparatus operated by compressed air for raising deposits of gravel or the like from beneath bodies of water comprising a dredge pipe which is open at its extreme lower end and is immersible into water, a suction head attached to the lower portion of the dredge pipe, cutting tools surrounding said suction head and being rotatably attached thereto, motor I means for driving said cutting tools, and an annular nozzle located at the lower end of said suction head for, directing a supply of compressed air into the interior of the dredge pipe, wherein said annular nozzle is provided with inclined air guide fins, said dredge pipe being surrounded by a supporting pipe, theannular space between the two pipes serving as a conduit for the compressed air supplied to the annular nozzle, characterized in that the motor means comprises two hydraulic motors, said motorsbeing supplied with hydraulic fluid through conduits arranged in said annular space.
- An apparatus characterized in that check valve means are included in the walls of the supporting pipe for the introduction of compressed air into said housing to assist the sealing means in precluding the entry of foreign materials into said housing.
- An apparatus including means to intermittently force compressed air downwardly through the dredge pipe against the dredging direction for cleaning the lower opening.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Cleaning In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1816221A DE1816221C3 (de) | 1968-12-20 | 1968-12-20 | Vorrichtung zum Fördern von durch Wasser überdeckten Ablagerungen, insbesondere von Kies od.dgl |
Publications (1)
Publication Number | Publication Date |
---|---|
US3673716A true US3673716A (en) | 1972-07-04 |
Family
ID=5716989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US859872A Expired - Lifetime US3673716A (en) | 1968-12-20 | 1969-09-22 | Compressed air operated apparatus for raising underwater deposits |
Country Status (6)
Country | Link |
---|---|
US (1) | US3673716A (de) |
AT (1) | AT304379B (de) |
CH (1) | CH498257A (de) |
DE (1) | DE1816221C3 (de) |
FR (1) | FR2026694A1 (de) |
GB (1) | GB1285200A (de) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3941120A (en) * | 1972-05-02 | 1976-03-02 | Shaotsu Thomas Lee | Ventilating endoscopes |
US3993355A (en) * | 1975-11-17 | 1976-11-23 | Cunningham Kelly G | Mining machine having pneumatic conveyance and cutter head floor driven about anchor |
US4192461A (en) * | 1976-11-01 | 1980-03-11 | Arborg Ole J M | Propelling nozzle for means of transport in air or water |
US4558744A (en) * | 1982-09-14 | 1985-12-17 | Canocean Resources Ltd. | Subsea caisson and method of installing same |
US4681372A (en) * | 1986-02-11 | 1987-07-21 | Mcclure William L | Deep sea mining apparatus |
US4830541A (en) * | 1986-05-30 | 1989-05-16 | Shell Offshore Inc. | Suction-type ocean-floor wellhead |
US5360292A (en) * | 1993-07-08 | 1994-11-01 | Flow International Corporation | Method and apparatus for removing mud from around and inside of casings |
US5603171A (en) * | 1994-02-21 | 1997-02-18 | Krupp Fordertechnik Gmbh | Process and apparatus for suctioning off the solid material from waterbeds |
US5656174A (en) * | 1996-02-16 | 1997-08-12 | Solomon Venture | Dredging system and method |
US5887667A (en) * | 1997-07-16 | 1999-03-30 | Ring-O-Matic Manufacturing Company, Inc. | Method and means for drilling an earthen hole |
US5938936A (en) * | 1996-02-16 | 1999-08-17 | Solomon Technologies, Inc. | Method for dewatering flocculated materials |
US5970635A (en) * | 1998-01-29 | 1999-10-26 | Wilmoth; Daryl | Jet agitation dredging system |
NL1012795C2 (nl) * | 1999-08-09 | 2001-02-12 | Ballast Nedam Baggeren Bv | Werkwijze en inrichting voor baggerwerkzaamheden met holle aandrijving voor een snijkop. |
US20060162195A1 (en) * | 2005-01-26 | 2006-07-27 | Langdon Brian B | System and method of dewatering dredge spoils using sloping drain barge |
NL1032670C2 (nl) * | 2006-07-28 | 2008-01-29 | Bos & Kalis Baggermaatsch | Snijkopaandrijving. |
EP1882783A2 (de) * | 2006-07-28 | 2008-01-30 | Baggermaatschappij Boskalis Bv | Schneidkopfantrieb. |
US20110088911A1 (en) * | 2009-10-15 | 2011-04-21 | Intermoor, Inc. | Embedded multi-string well head shear |
US10053836B2 (en) * | 2013-07-12 | 2018-08-21 | Ihc Holland Ie B.V. | Vacuum control method for a riser line |
US10221539B2 (en) * | 2015-11-25 | 2019-03-05 | Neodrill As | System and method for foundation of wellheads |
US20210087783A1 (en) * | 2017-05-15 | 2021-03-25 | Ihc Holland Ie B.V. | Cutter head with skirt |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2310769C2 (de) * | 1973-03-03 | 1983-05-19 | Toshinobu Kitakyushu Fukuoka Araoka | Vorrichtung zum Ausheben von Boden in Gewässern und zum Herstellen von Bohrlöchern |
DE2942304C2 (de) * | 1979-10-19 | 1984-11-15 | Preussag Ag, 3000 Hannover Und 1000 Berlin | Anordnung zum Abbau von Meeressedimenten |
DE3005669A1 (de) * | 1980-02-15 | 1981-10-01 | Schüttgutfördertechnik AG, 9009 St. Gallen | Vorrichtung zum foerdern von schuettfaehigem gut, insbesondere unter wasser lagerndem sand, kies o.dgl. |
NL8403797A (nl) * | 1984-12-14 | 1986-07-01 | Zanen Verstoep Nv | Baggervaartuig, en een daardoor boven een te baggeren trace uit te houden dubbele snijkop, die een reactieloze werking kan uitoefenen. |
DE102006042339A1 (de) * | 2006-08-14 | 2008-02-28 | Nukem Gmbh | Verfahren und Anordnung zum Absaugen von in Flüssigkeit abgelagerten Feststoffen |
ITMI20070734A1 (it) * | 2007-04-11 | 2008-10-12 | Sirti Spa | Macchina per la fresatura del terreno |
CN105544636A (zh) * | 2014-09-19 | 2016-05-04 | 卜建余 | 双斗轮三绞刀型绞吸式水下清淤机 |
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US3148464A (en) * | 1962-06-07 | 1964-09-15 | Kenneth M Jones | Dredging apparatus |
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US3301606A (en) * | 1966-06-23 | 1967-01-31 | Anthony I Bruno | Cyclonic elevator |
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US3385382A (en) * | 1964-07-08 | 1968-05-28 | Otis Eng Co | Method and apparatus for transporting fluids |
US3474549A (en) * | 1966-09-09 | 1969-10-28 | Ludwig Schnell | Apparatus for conveying sand or the like |
-
1968
- 1968-12-20 DE DE1816221A patent/DE1816221C3/de not_active Expired
-
1969
- 1969-09-22 US US859872A patent/US3673716A/en not_active Expired - Lifetime
- 1969-10-31 AT AT1023869A patent/AT304379B/de not_active IP Right Cessation
- 1969-11-05 CH CH1642369A patent/CH498257A/de not_active IP Right Cessation
- 1969-11-20 GB GB56924/69A patent/GB1285200A/en not_active Expired
- 1969-12-19 FR FR6944077A patent/FR2026694A1/fr not_active Withdrawn
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US499042A (en) * | 1893-06-06 | Hydraulic dredging-machine | ||
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US1861349A (en) * | 1929-06-08 | 1932-05-31 | A M Lockett & Company Ltd | Dredge |
US2599980A (en) * | 1947-01-25 | 1952-06-10 | Oscar Thomas Mcshane | Hydraulic dredging machine |
US2711598A (en) * | 1951-07-31 | 1955-06-28 | Jr James H Craggs | Hydraulic excavator |
GB851333A (en) * | 1959-02-17 | 1960-10-12 | Verschure & Co S Scheepswerf E | Improvements in or relating to suction and/or expulsion dredgers |
US3148464A (en) * | 1962-06-07 | 1964-09-15 | Kenneth M Jones | Dredging apparatus |
US3253357A (en) * | 1963-05-27 | 1966-05-31 | Allard Pierre Jean-Ma Theodore | Underwater excavating device |
US3385382A (en) * | 1964-07-08 | 1968-05-28 | Otis Eng Co | Method and apparatus for transporting fluids |
US3359741A (en) * | 1966-03-11 | 1967-12-26 | Arthur J Nelson | Deep water support system |
US3301606A (en) * | 1966-06-23 | 1967-01-31 | Anthony I Bruno | Cyclonic elevator |
US3474549A (en) * | 1966-09-09 | 1969-10-28 | Ludwig Schnell | Apparatus for conveying sand or the like |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US3941120A (en) * | 1972-05-02 | 1976-03-02 | Shaotsu Thomas Lee | Ventilating endoscopes |
US3993355A (en) * | 1975-11-17 | 1976-11-23 | Cunningham Kelly G | Mining machine having pneumatic conveyance and cutter head floor driven about anchor |
US4192461A (en) * | 1976-11-01 | 1980-03-11 | Arborg Ole J M | Propelling nozzle for means of transport in air or water |
US4558744A (en) * | 1982-09-14 | 1985-12-17 | Canocean Resources Ltd. | Subsea caisson and method of installing same |
US4681372A (en) * | 1986-02-11 | 1987-07-21 | Mcclure William L | Deep sea mining apparatus |
US4830541A (en) * | 1986-05-30 | 1989-05-16 | Shell Offshore Inc. | Suction-type ocean-floor wellhead |
US5360292A (en) * | 1993-07-08 | 1994-11-01 | Flow International Corporation | Method and apparatus for removing mud from around and inside of casings |
US5603171A (en) * | 1994-02-21 | 1997-02-18 | Krupp Fordertechnik Gmbh | Process and apparatus for suctioning off the solid material from waterbeds |
US6149811A (en) * | 1996-02-16 | 2000-11-21 | Solomon Ventures Llc | Dredging system |
US5938936A (en) * | 1996-02-16 | 1999-08-17 | Solomon Technologies, Inc. | Method for dewatering flocculated materials |
US5656174A (en) * | 1996-02-16 | 1997-08-12 | Solomon Venture | Dredging system and method |
US5887667A (en) * | 1997-07-16 | 1999-03-30 | Ring-O-Matic Manufacturing Company, Inc. | Method and means for drilling an earthen hole |
US5970635A (en) * | 1998-01-29 | 1999-10-26 | Wilmoth; Daryl | Jet agitation dredging system |
NL1012795C2 (nl) * | 1999-08-09 | 2001-02-12 | Ballast Nedam Baggeren Bv | Werkwijze en inrichting voor baggerwerkzaamheden met holle aandrijving voor een snijkop. |
US7509759B2 (en) * | 2005-01-26 | 2009-03-31 | General Construction Company | System and method of dewatering dredge spoils using sloping drain barge |
US20060162195A1 (en) * | 2005-01-26 | 2006-07-27 | Langdon Brian B | System and method of dewatering dredge spoils using sloping drain barge |
NL1032670C2 (nl) * | 2006-07-28 | 2008-01-29 | Bos & Kalis Baggermaatsch | Snijkopaandrijving. |
EP1882783A2 (de) * | 2006-07-28 | 2008-01-30 | Baggermaatschappij Boskalis Bv | Schneidkopfantrieb. |
EP1882783A3 (de) * | 2006-07-28 | 2009-07-22 | Baggermaatschappij Boskalis Bv | Schneidkopfantrieb. |
US20110088911A1 (en) * | 2009-10-15 | 2011-04-21 | Intermoor, Inc. | Embedded multi-string well head shear |
US10053836B2 (en) * | 2013-07-12 | 2018-08-21 | Ihc Holland Ie B.V. | Vacuum control method for a riser line |
US10221539B2 (en) * | 2015-11-25 | 2019-03-05 | Neodrill As | System and method for foundation of wellheads |
US20210087783A1 (en) * | 2017-05-15 | 2021-03-25 | Ihc Holland Ie B.V. | Cutter head with skirt |
US11814813B2 (en) * | 2017-05-15 | 2023-11-14 | Ihc Holland Ie B.V. | Cutter head with skirt |
Also Published As
Publication number | Publication date |
---|---|
DE1816221C3 (de) | 1974-06-27 |
FR2026694A1 (de) | 1970-09-18 |
DE1816221A1 (de) | 1970-07-23 |
CH498257A (de) | 1970-10-31 |
GB1285200A (en) | 1972-08-09 |
AT304379B (de) | 1973-01-10 |
DE1816221B2 (de) | 1973-12-06 |
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