NL2016470B1 - Device for dredging by water injection. - Google Patents

Device for dredging by water injection. Download PDF

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Publication number
NL2016470B1
NL2016470B1 NL2016470A NL2016470A NL2016470B1 NL 2016470 B1 NL2016470 B1 NL 2016470B1 NL 2016470 A NL2016470 A NL 2016470A NL 2016470 A NL2016470 A NL 2016470A NL 2016470 B1 NL2016470 B1 NL 2016470B1
Authority
NL
Netherlands
Prior art keywords
water
dredging
dredged
algorithm
jet nozzles
Prior art date
Application number
NL2016470A
Other languages
Dutch (nl)
Inventor
Van Rhee Cornelis
Van Der Schrieck Bart
Nicolaas Swart Robertus
Kollen Jan
Original Assignee
Univ Delft Tech
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Univ Delft Tech filed Critical Univ Delft Tech
Priority to NL2016470A priority Critical patent/NL2016470B1/en
Priority to PCT/NL2017/050172 priority patent/WO2017164730A1/en
Application granted granted Critical
Publication of NL2016470B1 publication Critical patent/NL2016470B1/en

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G8/00—Underwater vessels, e.g. submarines; Equipment specially adapted therefor
    • B63G8/001—Underwater vessels adapted for special purposes, e.g. unmanned underwater vessels; Equipment specially adapted therefor, e.g. docking stations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
    • E02B3/023—Removing sediments
    • 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
    • E02F3/8858—Submerged units
    • E02F3/8866—Submerged units self propelled
    • 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
    • E02F3/9218—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel 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
    • E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
    • E02F3/9262—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with jets
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

Device for dredging by water injection, comprising piping with first water jet nozzles to fluidize sediment on a bottom of a river or sea which is to be dredged, at least a pump to supply the piping with water under pressure, and means to transport the device and its piping with the water jet nozzles along and above the sediment to be dredged, wherein the device is an autonomous submersible vehicle.

Description

Device for dredging by water injection
The invention relates to a device for dredging by water injection, comprising fluidization means to fluidize sediment on a bottom of a waterbody which is to be dredged, and means to transport the device along and above the sediment to be dredged. The waterbody may be of any type such as a river or sea, a harbour basin, a reservoir, etc.
Such a device is known from EP-A-0 119 653 and from EP-A-0 243 994. The known device comprises piping with first water jet nozzles to fluidize or dilute sediment on a bottom of a waterbody which is to be dredged, at least a pump to supply the piping with water under pressure, and means to transport the device and its piping with the water jet nozzles along and above the sediment to be dredged. In the known device a vessel is used from which the piping with the downwardly directed water jet nozzles are lowered by means of a tackle or otherwise. The piping with the nozzles is tracked along the bottom of the river or sea by the moving vessel. Water is supplied to the piping from the vessel by appropriate pressure means .
There are a number of disadvantages or problems that associate with this known device.
In the first place it requires a lot of manpower and therefore costs to operate the device.
Secondly dredging with the device of the prior art is sensitive to waves. The waves cause that the level of the piping and the water jet nozzles varies, due to which effective dredging cannot always be guaranteed. A third problem is that there is a maximum depth at which dredging can be carried out because the dimensions of the construction below the vessel are not without limitations. With larger depths the underwater construction becomes bulkier and heavier, whereas the vessel must accordingly be upscaled. Both factors contribute to increased costs and impose limitations on the maximum water depth at which the dredging can be carried out. A fourth problem is that although dredging by water injection is much more energy-efficient than other known means of dredging, still the operation of the vessel places a high C02 burden on the environment, which problem becomes larger when dredging must be performed under more difficult circumstances such as larger water depth. A fifth problem is that the prior art manner of dredging provides hindrance for the other water traffic. A sixth problem is that moored vessels and pontoons prevent effective dredging below such vessels and pontoons.
It is therefore an object of the invention to address or at least alleviate these problems.
Accordingly the device of the invention for dredging by water injection has the features of one or more of the appended claims.
According to a first aspect of the invention the device is a submersible vehicle. Preferably it is an autonomous submersible vehicle. This provides several beneficial features; the vehicle being autonomous reduces the amount of manpower involved for its operation, and further the fact that it is submersible means that it can operate below the water level and be therefore insensitive to the effect of waves. A further important feature is that it is possible with the device of the invention to perform dredging at larger depths than is possible according to the prior art.
It is possible that the device is equipped with screws providing during use a downwards directed water stream to effect the dredging. Preferably however in accordance with the prior art the device is equipped with piping with first water jet nozzles and at least a pump to supply the piping with water under pressure.
In an advantageous embodiment the device is remotely operable. This is helpful in case it is desired to provide emphasis on particular areas that need to be dredged.
In a most preferred embodiment however the device is computer-controlled and is provided with an algorithm which is arranged to execute the dredging according to a pre-established scheme. In this embodiment the largest savings on manpower are attainable.
The computer controlling device can be either external or internal of the device. It is preferred however to include the computer in the device.
Beneficially the algorithm is arranged to adapt the pre-established scheme to meet predefined requirements. The scheme therefore needs not to be stationary but can automatically adjust to circumstances underwater where the dredging occurs .
Desirably further the device has a sensor for measuring a distance of the vehicle to the bottom to be dredged, wherein the algorithm is arranged to manoeuver the device in dependence of a signal from the sensor. This enables that amongst others the optimum height of the nozzles with respect to the sediment to be dredged can be maintained. The sensor may be functional according to several principles, for instance acoustic or otherwise.
The propulsion of the device of the invention can suitably be performed with a conventional screw propulsion. In a preferred embodiment or desirably in combination with the other features of the device of the invention it is preferable however that the device has second water jet nozzles for providing propulsion to the device. This effectively uses parts of the device that are anyway required for performing dredging by water injection. Apart from being effective this therefore also saves on costs. In case second water jet nozzles are used for propulsion, these water jet nozzles are preferably aligned approximately horizontally during use.
Beneficially the device has energy storage on board. The energy storage may for instance be a battery pack, or other suitable means such as a pneumatic storage of compressed air, or a fuel-cell. The energy from the energy storage may be used for driving the water pump which may thus have the water expel from the first water jets for dredging, and -if present-from the second horizontal water jets to provide propulsive forces to the device.
Advantageously in case the device is provided with a battery pack, the above-mentioned algorithm is arranged to return the device to a docking station at water level when the charge level of the battery pack runs low.
It is further preferable that the battery pack is chargeable with photovoltaic cells provided on top of the device and/or forming part of the docking station, or with other suitable sources of green energy at or through the docking station to save on the C02 impact on the environment.
The invention will hereinafter be further elucidated with reference to the drawing of an exemplary embodiment of an apparatus according to the invention that is not limiting as to the appended claims.
In the drawing: -figure 1 shows a device according to the invention in an isometric view from above; and -figure 2 shows the device of figure 1 in an isometric view from below.
Whenever in the figures the same reference numerals are applied, these numerals refer to the same parts.
With reference both to figure 1 and figure 2 for clarity purposes a "translucent" principle scheme of a dredging device 1 according to the invention is shown which may be used for dredging by water injection. The device 1 comprises piping 2, wherein figure 2 shows that said piping 2 is provided with first water jet nozzles 3 which may be used to fluidize or dilute sediment on a bottom of a waterbody which is to be dredged.
Both figure 1 and figure 2 also show a pump 4 and an electric pump drive 5 to supply the piping 2 with water under pressure to be expelled through the first waterjet nozzles 3. The water is obtained through an inlet (not shown) that is provided on a superficial area of the device 1.
Figure 1 and figure 2 also show means to transport the device 1 and its piping 2 with the water jet nozzles 3 in the form of second water jet nozzles 6 for providing propulsive forces to the device. It is however within the scope of the invention to provide other means of propulsion to the device, such as a conventional screw propulsion. As the figures show during use the second water jet nozzles 6 are aligned horizontally. The earlier mentioned pump 4 can be used for providing the propulsive energy to the device 1.
As figure 1 and figure 2 show the device 1 is not mechanically linked to any other device or apparatus, which underlines that the device 1 is an autonomous submersible vehicle. The device 1 can be remotely operable through a wireless connection, however it is preferred that the device 1 is computer-controlled with a computer 8 mounted in the device 1 which is provided with an algorithm that is arranged to execute the dredging according to a pre-established scheme. It is also possible that this pre-established scheme is adaptable to meet certain circumstances underwater where the dredging occurs and which are not anticipated by said scheme at the start of the dredging. Figure 2 shows that it has sensors 9 (one sensor can suffice) for measuring a distance of the device 1 to the bottom to be dredged, wherein the algorithm is arranged to manoeuver the device in dependence of a signal from the sensors 9. The sensors 9 which can be used for measuring depth and distance are connected to the on board computer 8.
To support the autonomous character of the device 1 of the invention it has an energy storage, in this embodiment a battery pack 7 on board. The just mentioned algorithm is preferably arranged to return the device 1 to a docking station (not shown) above water level when the charge level of the battery pack 7 runs low. Preferably the battery pack 7 is chargeable with photovoltaic cells provided on top of the device 1 and/or forming part of the docking station. It is also possible to provide in using green energy which is made available at or through the docking station. The way how this can be implemented is completely clear to the skilled person, so that an explanation with reference to the drawing can be dispensed with.
Although the invention has been discussed in the foregoing with reference to an exemplary embodiment of the apparatus of the invention, the invention is not restricted to this particular embodiment which can be varied in many ways without departing from the invention. The discussed exemplary embodiment shall therefore not be used to construe the appended claims strictly in accordance therewith. On the contrary the embodiment is merely intended to explain the wording of the appended claims without intent to limit the claims to this exemplary embodiment. The scope of protection of the invention shall therefore be construed in accordance with the appended claims only, wherein a possible ambiguity in the wording of the claims shall be resolved using this exemplary embodiment.

Claims (14)

1. Inrichting (1) voor het baggeren door waterinjec-tie, omvattende fluïdisatiemiddelen voor het fluïdiseren en/of verdunnen van sediment op een bodem van een waterlichaam welke gebaggerd moet worden, en middelen (6) voor het transporteren van de inrichting (1) langs en boven het sediment dat gebaggerd moet worden, met het kenmerk, dat de inrichting (1) een onderwatervoertuig is.Device (1) for dredging by water injection, comprising fluidization means for fluidizing and / or diluting sediment on a bottom of a body of water to be dredged, and means (6) for transporting the device (1) along and above the sediment to be dredged, characterized in that the device (1) is an underwater vehicle. 2. Inrichting volgens conclusie 1, met het kenmerk, dat de inrichting (1) is uitgerust met schroeven welke tijdens gebruik een neerwaarts gerichte waterstroom verschaffen.Device according to claim 1, characterized in that the device (1) is equipped with screws which during use provide a downward directed water flow. 3. Inrichting volgens conclusie 1, met het kenmerk, dat de inrichting (1) is uitgerust met bepijping (2) met eerste waterstraalsproeiers (3) en tenminste een pomp (4) voor het aan de bepijping (2) verschaffen van water onder druk.Device according to claim 1, characterized in that the device (1) is equipped with pipe (2) with first water jet nozzles (3) and at least one pump (4) for supplying water under pressure to the pipe (2) . 4. Inrichting volgens één der conclusies 1-3, met het kenmerk, dat de inrichting (1) een autonoom onderwatervoertuig is.Device according to one of claims 1 to 3, characterized in that the device (1) is an autonomous underwater vehicle. 5. Inrichting volgens één der conclusies 1-3, met het kenmerk, dat de inrichting (1) op afstand bedienbaar is.Device according to one of claims 1 to 3, characterized in that the device (1) can be operated remotely. 6. Inrichting volgens één der conclusies 1-5, met het kenmerk, dat de inrichting (1) computer-bestuurd is en voorzien is van een algoritme welke is ingericht om het baggeren volgens een vooraf bepaald schema uit te voeren.Device according to one of claims 1 to 5, characterized in that the device (1) is computer-controlled and provided with an algorithm which is adapted to carry out dredging according to a predetermined schedule. 7. Inrichting volgens conclusie 6, met het kenmerk, dat computer-besturing van de inrichting (1) uitgevoerd wordt met een computer (8) welke in de inrichting is aangebracht.Device according to claim 6, characterized in that computer control of the device (1) is carried out with a computer (8) arranged in the device. 8. Inrichting volgens conclusie 6 of 7, met het kenmerk, dat het algoritme is ingericht om het vooraf bepaalde baggerschema aan te passen teneinde te beantwoorden aan vooraf bepaalde eisen.Device as claimed in claim 6 or 7, characterized in that the algorithm is adapted to adjust the predetermined dredging scheme in order to meet predetermined requirements. 9. Inrichting volgens één der voorgaande conclusies 1 - 8, met het kenmerk, dat deze een sensor (9) bezit voor het meten van een afstand van de inrichting (1) naar de te baggeren bodem, waarbij het algoritme is ingericht om de inrichting te manoeuvreren in afhankelijkheid van een signaal van de sensor (9).Device as claimed in any of the foregoing claims 1-8, characterized in that it has a sensor (9) for measuring a distance from the device (1) to the bottom to be dredged, wherein the algorithm is arranged around the device to maneuver depending on a signal from the sensor (9). 10. Inrichting volgens één der conclusies 1-9, met het kenmerk, dat deze tweede waterstraalsproeiers (6) bezit voor het verschaffen van stuwkracht aan de inrichting (1).Device according to one of claims 1 to 9, characterized in that it has second water jet nozzles (6) for providing thrust to the device (1). 11. Inrichting volgens conclusie 10, met het kenmerk, dat tijdens gebruik de tweede waterstraalsproeiers (6) ongeveer horizontaal zijn uitgelijnd.Device according to claim 10, characterized in that the second water jet nozzles (6) are aligned approximately horizontally during use. 12. Inrichting volgens één der voorgaande conclusies 1 - 11, met het kenmerk, dat deze aan boord een energieopslag (7) bezit.Device according to one of the preceding claims 1 to 11, characterized in that it has an energy storage (7) on board. 13. Inrichting volgens conclusies 6 en 12, met het kenmerk, dat het algoritme is ingericht om de inrichting (1) terug te voeren naar een dockingstation op waterniveau wanneer het ladingsniveau van de energieopslag (7) leeg raakt.Device according to claims 6 and 12, characterized in that the algorithm is adapted to return the device (1) to a water-level docking station when the charge level of the energy storage (7) becomes empty. 14. Inrichting volgens conclusie 12 of 13, met het kenmerk, dat de energieopslag (7) een batterijpak is welke laadbaar is met behulp van zonnecellen aangebracht boven op de inrichting (1) en/of welke behoren bij het dockingstation of met andere geschikte bronnen van groene energie ter plaatse van of gevoerd door het dockingstation.Device according to claim 12 or 13, characterized in that the energy storage (7) is a battery pack that can be charged with the aid of solar cells arranged on top of the device (1) and / or which belong to the docking station or with other suitable sources of green energy at or from the docking station.
NL2016470A 2016-03-22 2016-03-22 Device for dredging by water injection. NL2016470B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL2016470A NL2016470B1 (en) 2016-03-22 2016-03-22 Device for dredging by water injection.
PCT/NL2017/050172 WO2017164730A1 (en) 2016-03-22 2017-03-20 Submersible dredging device for dredging by water injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2016470A NL2016470B1 (en) 2016-03-22 2016-03-22 Device for dredging by water injection.

Publications (1)

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NL2016470B1 true NL2016470B1 (en) 2017-10-05

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NL2016470A NL2016470B1 (en) 2016-03-22 2016-03-22 Device for dredging by water injection.

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WO (1) WO2017164730A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202007660D0 (en) * 2019-11-18 2020-07-08 Harwich Haven Authority Dredging method and apparatus

Citations (4)

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US3672725A (en) * 1970-06-15 1972-06-27 Earl & Wright Ltd Deep sea mining method and apparatus
WO1999050508A1 (en) * 1998-04-01 1999-10-07 Seabed Impeller Levelling And Trenching Limited Dredging apparatus
EP2423102A1 (en) * 2010-08-31 2012-02-29 ATLAS Elektronik GmbH Unmanned submarine and method for operating an unmanned submarine
US20130151061A1 (en) * 2010-08-20 2013-06-13 Korea Institute Of Robot & Convergence Cleaning robot and underwater sediment cleaning apparatus and method

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FR2377522A1 (en) * 1977-01-18 1978-08-11 Commissariat Energie Atomique VEHICLE OF NODULES ON A SEA BOTTOM
NL8300990A (en) 1983-03-18 1984-10-16 Ir Reijer Nicolaas Van Weezenb METHOD FOR REMOVING SLUDGE OR MUD FROM THE BOTTOM OF A WATER AREA.
NL8600941A (en) 1986-04-14 1987-11-02 Ir Reijer Nicolaas Van Weezenb DEVICE FOR MOVING SEDIMENT UNDER WATER AND METHOD FOR USING SUCH DEVICE
JP5822644B2 (en) * 2011-10-20 2015-11-24 日立造船株式会社 Cleaning device for filtration layer in seawater infiltration.
US9457879B2 (en) * 2012-12-17 2016-10-04 Seabed Geosolutions B.V. Self-burying autonomous underwater vehicle and method for marine seismic surveys
US20160167755A1 (en) * 2013-11-12 2016-06-16 Conocophillips Company Unmanned underwater vehicles, locations of their docking stations, and their programmed routes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3672725A (en) * 1970-06-15 1972-06-27 Earl & Wright Ltd Deep sea mining method and apparatus
WO1999050508A1 (en) * 1998-04-01 1999-10-07 Seabed Impeller Levelling And Trenching Limited Dredging apparatus
US20130151061A1 (en) * 2010-08-20 2013-06-13 Korea Institute Of Robot & Convergence Cleaning robot and underwater sediment cleaning apparatus and method
EP2423102A1 (en) * 2010-08-31 2012-02-29 ATLAS Elektronik GmbH Unmanned submarine and method for operating an unmanned submarine

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