WO2024076242A1 - Dispositif d'extraction de masse non consolidée au fond de la mer - Google Patents

Dispositif d'extraction de masse non consolidée au fond de la mer Download PDF

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Publication number
WO2024076242A1
WO2024076242A1 PCT/NO2023/060055 NO2023060055W WO2024076242A1 WO 2024076242 A1 WO2024076242 A1 WO 2024076242A1 NO 2023060055 W NO2023060055 W NO 2023060055W WO 2024076242 A1 WO2024076242 A1 WO 2024076242A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible collar
main housing
seabed
suction
manifold
Prior art date
Application number
PCT/NO2023/060055
Other languages
English (en)
Inventor
Lambertus SWITYNK
Original Assignee
Imo Mare As
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 Imo Mare As filed Critical Imo Mare As
Publication of WO2024076242A1 publication Critical patent/WO2024076242A1/fr

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
    • 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
    • E02F3/8858—Submerged units
    • E02F3/8875—Submerged units pulled or pushed
    • 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
    • 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
    • E02F3/9293—Component parts of suction heads, e.g. edges, strainers for preventing the entry of stones or the like
    • 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

Definitions

  • the present invention concerns a device for removal or extraction of non-consolidated materials at seabed in a lenient and controlled manner as indicated by the preamble of claim 1, causing a minimum of disturbance to the subsea environment.
  • Conventional dredging systems have a suction head that is trailed by a vessel.
  • their purpose is to remove as much sediment as efficient as possible over a predefined grid. This activity not only causes significant disturbance of the seabed itself but also suspends small sediment particles into the water column.
  • NO 20180830 A describes a system for the removal and treatment of sediment specifically from fish farms.
  • the process also refers to the use of a suction piece but does not provide any details on the functionality of this.
  • the use of a hovering ROV together with a standard suction piece is likely to result in inaccurate removal and suspension of smaller sediment particles in the water column.
  • JP 2000220164 A describes a system for the removal of sediment by means of rotational agitators and using a screw conveyor system for transport of the sediment mixture to surface.
  • KR 20140043425 A describes a system for the removal of sediment by means of a suction cone with ejector type function.
  • the ejector creates a venturi effect resulting in a negative suction pressure inside the cone.
  • EP 0047803 Al describes a method and a suction dredging device for sucking up dredging spoil.
  • the device includes a suction head which comprises a flexible wall allowing adjustment in dependence of a pressure difference between the pressure of a suspension stream and the pressure in the ambient water.
  • the present invention is a.
  • Non-consolidated sediment as used I herein shall be understood to cover the rather loose mass on top of cohesive sediment irrespective of their origin.
  • front end is understood the end towards which the device is moving under normal operation.
  • the removal of non-consolidated mass according to the present invention is conducted in a very controlled and lenient manner, with a minimum of disturbance at the seabed.
  • An important aspect is this connection is the fact that dispersal of small particles can cause oxygen depletion in the water column and spread pollution over a larger area.
  • the use of the present device could also be denoted extraction of mass rather than dredging of mass, due to its inherent leniency.
  • non-consolidated mass may refer to mass of any origin
  • the present invention is particularly aimed at removal of organic matter, such as waste from fish farms, as well as extraction of industrial polluted sediments in harbour and coastal areas or valuable substances worth extracting due to their inherent value.
  • the device according to the present invention is interfaced with a Remotely Operated Vehicle (ROV), typically an ROV arranged to crawl on the seabed and to accurately position the device according to the present invention on the seabed as desired.
  • ROV Remotely Operated Vehicle
  • the suction device connectable to the device according to the present invention is not part of the invention, and can be carried by the ROV or arranged at sea level or in any other suitable manner. Attachment of the device to an ROV and to the suction device may be separate or integrated as one unit comprising both functionalities, i.e. mechanical connection as well as fluid connection.
  • Means for adjustment of the suction force may be arranged locally on the device or on the suction device or both.
  • the device according to the present invention is provided with adjustable valves to regulate the suction force, the main inlet area, to the void or both.
  • Monitoring systems may be provided to monitor one or more of suction force, flow rate, depth of non-consolidated mass and to provide visual monitoring by cameras and possibly sonar. It may also be provided with equipment to accurately keep track of its horizontal and vertical movement.
  • the present invention is unique a. o. in that the flexible collar allows for a tight seal against the seabed and accurate height adjustments.
  • the height can be adjusted very accurately by adjusting the volume inside the flexible collar. Increased volume will raise the suction system and a decrease will achieve the opposite. Liquid will be used as a medium to adjust the volume.
  • Nozzles distributed around the circumference of the passage between the void in the main housing and the external environment will, when the device according to the present invention is connected to a suction device as indicated, be able to remove particles that come into suspension during the removal process and ensure a minimum of contamination of the environment around the work site.
  • Figure 1 is an exploded view of the main components of an embodiment of the device according to the present invention
  • FIG. 2 is a side sectional view of the embodiment illustrated in Figure 1
  • Figure 1 By schematic is understood that the drawings present the principle of the invention but that the mutual dimensions of different components not necessarily are in scale with real life embodiments.
  • Figure 1 shows the main components of an embodiment of the device according to the present invention, specifically a suction manifold 11 and below that a filter 12, a main housing 13, a flexible collar 14, and a tube-shaped member 15 provided with nozzles, the latter visible in Fig. 2.
  • a suction manifold 11 In front of the main housing 13 an adjustable gatel6 is shown as well as a grizzly bar 17 and an object diverter 18.
  • An interface 19 for attachment to an ROV is shown from the suction manifold 11.
  • Visible in Figure 1 are also a front cover 132 of the main housing, covering only upper part of the front, an internal void 131 in the main housing and a bottom edge 133 of the main housing at three side wall surfaces thereof.
  • FIG. 2 showing a side sectional view of device in operation, moving from right to left as indicated by arrow M.
  • the ROV causing the movement is omitted from the drawing for the sake of simplicity, but would be connected to the interface 19.
  • One side of a U- shaped tube member 15 having approximately the same shape and extension as the flexible collar 14, runs around the backside and the lateral (left and right hand) sides of the bottom edge 133 of the main housing 13, externally of the connection between the main housing 13 and the flexible collar 14.
  • the flexible collar 12 is immersed in non-consolidated mass 23 while supported by the more permanent, cohesive sediment 22.
  • the non-consolidated mass passes through the grizzly bar 17 and is sucked up into and through the internal void 131 and passed further on out through the suction manifold 11. Minor particles that escape the opening into the outer void are largely sucked into nozzles 151 in the tube-shaped member 15 which is connected to a suction source, preferable the same suction force that generates suction in the manifold 11 and the internal void 131.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un dispositif d'élimination de masse non consolidée d'un fond marin. Ledit dispositif comprend un carter principal (13) ayant un vide interne (131), un côté avant (132) et un bord inférieur (133) entourant au moins partiellement un passage ouvert du vide interne (131) à l'environnement ambiant au fond et à l'avant inférieur du carter principal (13). Le dispositif comprend en outre un collecteur (11) avec un passage de fluide vers le vide interne (131), ledit collecteur pouvant être relié à un dispositif d'aspiration externe, et un élément de raccordement (19) destiné à être fixé à un véhicule sous-marin. Le dispositif présente un collier flexible (14) fixé à son bord inférieur (133) et recouvrant au moins partiellement son bord inférieur (133) et est pourvu d'une pluralité de buses (151) reliées au dispositif d'aspiration.
PCT/NO2023/060055 2022-10-04 2023-09-26 Dispositif d'extraction de masse non consolidée au fond de la mer WO2024076242A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20221055A NO347988B1 (en) 2022-10-04 2022-10-04 Device for removal of non-consolidated mass at seabed
NO20221055 2022-10-04

Publications (1)

Publication Number Publication Date
WO2024076242A1 true WO2024076242A1 (fr) 2024-04-11

Family

ID=90608417

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2023/060055 WO2024076242A1 (fr) 2022-10-04 2023-09-26 Dispositif d'extraction de masse non consolidée au fond de la mer

Country Status (2)

Country Link
NO (1) NO347988B1 (fr)
WO (1) WO2024076242A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047803A1 (fr) * 1980-09-12 1982-03-24 Dosbouw v.o.f. Procédé et dispositif à drague suceuse pour aspirer des matières draguées
US5970635A (en) * 1998-01-29 1999-10-26 Wilmoth; Daryl Jet agitation dredging system
NO20201145A1 (en) * 2020-10-22 2022-04-25 Kontorveien 1 As Suction Generation Device
WO2023068942A1 (fr) * 2021-10-22 2023-04-27 Granfoss As Système de dragage et procédé de dragage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0047803A1 (fr) * 1980-09-12 1982-03-24 Dosbouw v.o.f. Procédé et dispositif à drague suceuse pour aspirer des matières draguées
US5970635A (en) * 1998-01-29 1999-10-26 Wilmoth; Daryl Jet agitation dredging system
NO20201145A1 (en) * 2020-10-22 2022-04-25 Kontorveien 1 As Suction Generation Device
WO2023068942A1 (fr) * 2021-10-22 2023-04-27 Granfoss As Système de dragage et procédé de dragage

Also Published As

Publication number Publication date
NO20221055A1 (en) 2024-04-05
NO347988B1 (en) 2024-06-03

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