EP0134312A1 - Méthode et dispositif pour déblayer des matériaux au dessous de la surface d'eau - Google Patents
Méthode et dispositif pour déblayer des matériaux au dessous de la surface d'eau Download PDFInfo
- Publication number
- EP0134312A1 EP0134312A1 EP83201044A EP83201044A EP0134312A1 EP 0134312 A1 EP0134312 A1 EP 0134312A1 EP 83201044 A EP83201044 A EP 83201044A EP 83201044 A EP83201044 A EP 83201044A EP 0134312 A1 EP0134312 A1 EP 0134312A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stream
- downcoming
- rising
- propeller
- anyone
- 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.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles
Definitions
- the invention relates to a method of removing material lying under water, said material being lifted in a rising stream containing water and material and adjoining a downcoming stream containing water.
- Such a method is known.
- the matter is loosened by downwardly directed jet lances and sucked up by a suction pipe.
- the jet lances produce a non-controlled whirl which pushes the suspended matter in all directons and hence also to places treated earlier. This is particularly inconvenient when a surface of, for example, a filter bed has to be cleaned, for example, when material to be removed is lying on said filter bed.
- the invention has for its object to remove subaqueous matter in an improved, controlled maaner.
- the downcoming stream or the rising stream envelops the other and has mainly the shape of a sheath.
- the invention relates to and provides a device as defined in claim 6.
- a helical rising stream is produced, which is located inside a helical downcoming stream.
- the means for producing the streams preferably comprise a propeller having two concentric blade crowns.
- a downwardly directed, helical stream 4 is produced by producing means 5 of a device 6 embodying the invention.
- This downcoming stream agitates the material 1 and fluidizes the same.
- the downcoming stream 4 goes over into a helical rising stream 7 in which the material 1 with the water 2 is lifted by cyclonic effect as fas as into a transport stream 8 conducting the material 1 away.
- This transport stream 8 may be a river or a tide or it may be pruced by a ship's screw.
- the producing means 5 of the device 6 comprise a propeller 9 which is rotatably driven in the direction of the arrow 10 and which comprises two concentric crowns of blades 11 and 12.
- the outer blades 11 are relatively short, but their number is high and they produce a practically closed sheath of a helical downcoming stream 4, inside which is located the rising stream 7, which is produced by a considerably smaller number of long blades 12.
- the propeller 9 is located at a considerable distance above the material 1.
- compressed air is supplied from a source through a central pipe 14 connected with a ring pipe 15.
- This ring pipe 15 has outlet ports distributed along the circumference through which air is injected into the downcoming stream 4. This air has a strong lifting effect when it gets into the rising stream 7 with the material and water.
- the device 16 of Figures 2 4 comprise a vessel 17 to which a frame 20 is suspended by means of a hoisting cable 18 of a winch 19.
- a frame 20 In the frame 20 are rotatably journalled two propellers 9, which are driven in opposite senses indicated by arrows 10 by a motor 21.
- To the frame 20 are fastened two ring pipes 15 concentric with the propellers 9.
- the ring pipe is provided with nozzles 22 distributed along the circumference, out of which flows compressed air which is injected into the downcoming stream 4 of water produced by the blades 11 located just above the same.
- the crowns of blades 11 and 12 are separated from one another by an annular partition 23.
- the angular position of the inner blades 12 is adjustable, since these blades can tilt about a horizontal axis 24 and are fixably arranged in the propeller by means of shafts 25.
- a screening frame 13 is fastened to the frame 20 as shown in Figures 2 to 4, inside of which frame 13 are produced two downcomer streams 4 and inside thereof the rising streams 7. Since the propellers 9 rotate in opposite senses, the torques exerted on the frame 20 neutralize one another.
- Figure 2 shows the transport stream 8, which carries along the suspension 26 of the rising stream 7.
- the frame 20 is suspended to winches 28, which are controlled in dependence on an echo sound 29 for assessing the depth of the bottom 3. If the bottom 3 is sloping in the direction of movement 30 of the vessel 17 and the slope of the producing means 5 are adjusted, in anticipation of the varying depth b, in the position shown by broken lines in Figure 2.
- the echo sound 29 controls the winches 19 and 28 through control-means 34.
- accurate depth setting meters 32 can be arranged on the screening frame 13 for accurately measuring the distance c from the material 1 to be removed from the bottom 3.
- a lifting device 33 For moving the assembly into and out of the water 2 a lifting device 33 is provided.
- a compressor 35 On board of the vessel 17 a compressor 35 is connected through a hose 36 with the ring pipe 15.
- the hoisting cable 18 not only the hose 36 but also the electric or hydraulic duct 38 are wound on or off, said members connecting the motors 21 to a source of energy 37.
- the speed of rotation and/or the angular position of the blades 12 can be set in order to lift the material 1 to the optimum extent, that is to say, to remove it as fast as possible.
- the speed of the vessel 17 is chosen so that the material 1 is removed to the desired extent.
- diameter of propeller 9 3 metres
- speed of revoluton of the propeller 100 to 110 rev/min
- the air rate 8 ms 3 /min
- the distance a 2.25 metres.
- the blade angle d between the inner blades 12 and the horizontal plane may lie between 5° and 20°.
- the corresponding angle e of the blades 11 may be of order of magnitude of 30°.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP83201044A EP0134312A1 (fr) | 1983-07-13 | 1983-07-13 | Méthode et dispositif pour déblayer des matériaux au dessous de la surface d'eau |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP83201044A EP0134312A1 (fr) | 1983-07-13 | 1983-07-13 | Méthode et dispositif pour déblayer des matériaux au dessous de la surface d'eau |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0134312A1 true EP0134312A1 (fr) | 1985-03-20 |
Family
ID=8190977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83201044A Withdrawn EP0134312A1 (fr) | 1983-07-13 | 1983-07-13 | Méthode et dispositif pour déblayer des matériaux au dessous de la surface d'eau |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0134312A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987004743A1 (fr) * | 1986-02-10 | 1987-08-13 | Consortium Resource Management Ltd. | Excavateur sous-marin commande a distance et echantillonneur |
EP0278335A2 (fr) * | 1987-02-10 | 1988-08-17 | Meyer & van der Kamp GmbH & Co. Kommanditgesellschaft - Jadesand | Procédé et dispositif pour enlever des boues d'un bassin d'un port ou similaire |
WO2001014649A1 (fr) * | 1999-08-21 | 2001-03-01 | Psl Technology Limited | Appareil et procede pour excavation dans un fond marin |
NL1020754C2 (nl) * | 2002-06-04 | 2003-12-08 | Seatools B V | Inrichting voor het verwijderen van sediment en functie-eenheid voor toepassing daarin. |
GB2614897A (en) * | 2022-01-21 | 2023-07-26 | Rotech Group Ltd | Improvements in and relating to underwater excavation apparatus |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL112850C (fr) * | ||||
US2125740A (en) * | 1934-12-24 | 1938-08-02 | William H Schacht | Hydraulic excavating device or booster |
DE893630C (de) * | 1951-08-01 | 1953-10-19 | Friedrich Koester | Geraet zur Stromraeumung |
US3153290A (en) * | 1962-01-30 | 1964-10-20 | Asia Dredging Co Ltd | Apparatus for subaqueous excavations |
FR2148814A5 (fr) * | 1971-08-04 | 1973-03-23 | Inst Zemleroinogo | |
US3855367A (en) * | 1972-10-25 | 1974-12-17 | W Webb | Venturi anti-siltation system |
FR2309675A1 (fr) * | 1975-04-29 | 1976-11-26 | Patworld Anstalt | Equipement d'extraction et transport de produits non cohesifs, et autres analogues depuis le fond de la mer |
US4140350A (en) * | 1977-09-14 | 1979-02-20 | Dundee Cement Company | Self regulating suction nozzle |
GB2095751A (en) * | 1981-03-05 | 1982-10-06 | Toyo Denki Kogyosho Co Ltd | Underwater sand pumps |
-
1983
- 1983-07-13 EP EP83201044A patent/EP0134312A1/fr not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL112850C (fr) * | ||||
US2125740A (en) * | 1934-12-24 | 1938-08-02 | William H Schacht | Hydraulic excavating device or booster |
DE893630C (de) * | 1951-08-01 | 1953-10-19 | Friedrich Koester | Geraet zur Stromraeumung |
US3153290A (en) * | 1962-01-30 | 1964-10-20 | Asia Dredging Co Ltd | Apparatus for subaqueous excavations |
FR2148814A5 (fr) * | 1971-08-04 | 1973-03-23 | Inst Zemleroinogo | |
US3855367A (en) * | 1972-10-25 | 1974-12-17 | W Webb | Venturi anti-siltation system |
FR2309675A1 (fr) * | 1975-04-29 | 1976-11-26 | Patworld Anstalt | Equipement d'extraction et transport de produits non cohesifs, et autres analogues depuis le fond de la mer |
US4140350A (en) * | 1977-09-14 | 1979-02-20 | Dundee Cement Company | Self regulating suction nozzle |
GB2095751A (en) * | 1981-03-05 | 1982-10-06 | Toyo Denki Kogyosho Co Ltd | Underwater sand pumps |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987004743A1 (fr) * | 1986-02-10 | 1987-08-13 | Consortium Resource Management Ltd. | Excavateur sous-marin commande a distance et echantillonneur |
US4932144A (en) * | 1986-02-10 | 1990-06-12 | Consortium Resource Management Limited | Remote underwater excavator and sampler |
EP0278335A2 (fr) * | 1987-02-10 | 1988-08-17 | Meyer & van der Kamp GmbH & Co. Kommanditgesellschaft - Jadesand | Procédé et dispositif pour enlever des boues d'un bassin d'un port ou similaire |
EP0278335A3 (en) * | 1987-02-10 | 1989-01-04 | Meyer & Van Der Kamp Gmbh & Co. Kommanditgesellschaft - Jadesand | Method and device for removing mud from a harbour basin or such |
WO2001014649A1 (fr) * | 1999-08-21 | 2001-03-01 | Psl Technology Limited | Appareil et procede pour excavation dans un fond marin |
NL1020754C2 (nl) * | 2002-06-04 | 2003-12-08 | Seatools B V | Inrichting voor het verwijderen van sediment en functie-eenheid voor toepassing daarin. |
WO2003102313A1 (fr) * | 2002-06-04 | 2003-12-11 | Seatools B.V. | Appareil pour supprimer les sediments et unite fonctionnelle a utiliser dans ce dernier |
GB2614897A (en) * | 2022-01-21 | 2023-07-26 | Rotech Group Ltd | Improvements in and relating to underwater excavation apparatus |
GB2614897B (en) * | 2022-01-21 | 2024-09-04 | Rotech Group Ltd | Improvements in and relating to underwater excavation apparatus |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19850507 |
|
17Q | First examination report despatched |
Effective date: 19860402 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19870203 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BAKKER, ADRIAAN DANIEL |