EP0928848A1 - Tête aspirante pour un appareil de dragage - Google Patents

Tête aspirante pour un appareil de dragage Download PDF

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Publication number
EP0928848A1
EP0928848A1 EP98300098A EP98300098A EP0928848A1 EP 0928848 A1 EP0928848 A1 EP 0928848A1 EP 98300098 A EP98300098 A EP 98300098A EP 98300098 A EP98300098 A EP 98300098A EP 0928848 A1 EP0928848 A1 EP 0928848A1
Authority
EP
European Patent Office
Prior art keywords
suction head
head
suction
opening
openings
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Withdrawn
Application number
EP98300098A
Other languages
German (de)
English (en)
Inventor
Robert De Backer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jan de Nul NV
Original Assignee
Jan de Nul NV
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 Jan de Nul NV filed Critical Jan de Nul NV
Priority to EP98300098A priority Critical patent/EP0928848A1/fr
Publication of EP0928848A1 publication Critical patent/EP0928848A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes

Definitions

  • the present invention relates to a suction head, and in particular, a suction head for fitting to a dredging apparatus for dredging silty soils, clay, sand or the like (hereinafter called soil).
  • One aim of the present invention is to provide a suction head for dredging apparatus that accurately and controllably removes a layer of soil, but which does not significantly disturb the surrounding soil layers or raise the local turbidity of the surrounding water which could result in bringing the soil into suspension.
  • Another aim is to provide a dredging apparatus fitted with a suction head wherein the depth of dredging can be accurately controlled, and which removes soil with a minimum amount of water entering the suction head of the dredging apparatus.
  • a suction head for a dredging apparatus comprising at least one side wall, two openings facing in different directions arranged therein through which dredged soil may pass, a base, a suction hole for connection to a soil collection pipe for extraction of the soil therethrough, and a guiding plate within the head selectively to connect one of the openings to the suction hole.
  • the guiding plate is hinged about a central pivot axis under the control of a hydraulic cylinder, between a first position in which one opening is connected to the suction hole, and a second position in which the second opening is connected to the suction hole.
  • the suction head preferably includes a cutting edge associated with each opening for defining the dredging depth in a layer of soil.
  • each cutting edge defines a lower perimeter of each opening.
  • the suction head is mounted on a lower end of a ladder associated with a dredger, or the like to form a dredging apparatus, the ladder being pivotally connected at its upper end about a horizontal axis to the dredger.
  • the dredging depth can be controlled.
  • a hinge is provided, and an hydraulic cylinder is fitted, in such a way that the head can be tilted with respect to the ladder; in this way the suction head is kept horizontal.
  • This system also makes it possible to control the angle between suction head and bottom to be dredged, in such a way that a slope can be dredged.
  • the openings in the head oppose each other such that a sweeping dredging action can effectively operate in both swing directions.
  • the size of the openings is preferably adjustable to define the height of the dredged layer.
  • a hinged flap may be connected to at least part of a perimeter wall of each opening or a plate may be fitted to, or removed from, the opening. For example, by fitting or removing one or more steel plates at the upperside of the opening, the height of the opening can be increased or decreased.
  • a hinged flap is installed at the upperside of the opening. This flap is moved by means of an hydraulic cylinder in such a way that the height of the opening is adjustable.
  • monitoring systems or instrumentation may be provided:
  • the control of the dredge-pump in the system in such a way that the delivery of the pump exactly matches the volume of the dredged soil flowing into the suction head. This avoids entry of unnecessary quantities of water into the system. In this way, the dredged soil is diluted as little as possible, in order to reduce the amount of contaminated soil to be treated afterwards, or to be transported.
  • the dredging apparatus comprises a suction head 13 mounted on a lower end of a ladder 15, the upper end of which is arranged to be pivotally mounted on a dredger about a pivot axis 21.
  • the suction head 13 is mounted via a tilting mechanism 17 such that the suction head can be tilted relative to the ladder 15 as illustrated in figure 2.
  • This allows the suction head (13) to be kept substantially horizontal, irrespective of the orientation of the ladder 15 or to be maintained at an appropriate angle to follow the contours of the area to be dredged. Alternatively, it allows dredging to be undertaken on a slope which is not horizontal.
  • the tilting mechanism 17 is driven by a cylinder 19, but other drive means could be utilised.
  • the pivot axis 21 allows the ladder 15 to be moved in an arc such that the suction head can be raised and lowered to control the dredging depth.
  • the suction head 13 comprises a top or upper wall 24, a base 40 or bottom wall 40, each of which are supported on box section members 42, a front wall 44, a rear wall 46, and extending between respective ends of the front and rear walls, a first opening 26 and a second opening 28.
  • the box section members 42 are a prefered feature. However, other structural supports may be used, steel plates or angle bars, for example.
  • Extending between upper and bottom walls 24, 40 is a pivot shaft 45 supporting a guiding plate 35 within the suction head 13.
  • One end of a lever arm 43 is rigidly connected to the shaft 45 and its opposite end is connected to an actuating cylinder 41 for applying force to the lever arm 43 to swing the guiding plate 35 about its pivot shaft 45.
  • the guiding plate 35 has a limited range of swing as indicated by arrow 47.
  • a suction hole 30 is formed in the suction head 13, partly within the rear wall 46 and partly within the upper wall 24, to which hole 30 a suction pipe 31 is connected. However, the suction hole 30 may be formed only in the rear wall 46 or the upper wall 24. The dimensions of the suction head 13 may determine the position of the suction hole 30.
  • the suction pipe 31 (only part of which is illustrated in Figure 4), is supported on the ladder 15, and is connected to a suitable dredge pump (not shown) which can be located on the ladder 15 or elsewhere within the dredger.
  • the dredging process consists of swinging the suction head 13 back and forth from one side to the other by means of the dredger's anchor wires and winches. During the swinging movement, the suction head 13 is pulled through an upper soil layer 23, soil from which enters the head through one of the suction head openings 26, 28 as illustrated by arrow 27 in Figure 3. This soil is then pumped away through the suction pipe 31 as illustrated by arrow 33 in Figure 5. This soil is then discharged into barges, not shown, or it may be pumped through a floating pipeline, not shown, to a containment facility.
  • the dredger is moved forwards by means of its spudsystem or by means of anchor wires, and a new swing in the other direction can be executed.
  • a soil layer can be removed to leave a dredged surface 25.
  • a cutting edge 49 is provided at the lower side of each opening 26, 28 . This cutting edge 49 defines the depth of the dredged surface 25.
  • the size of the openings 26, 28 can be adjusted in such a way that the height of the dredged layer of soil 23 can be adjusted.
  • the width of the openings may be adjustable. This height adjustment is achieved by hinged flaps 51 installed along an upper edge of the respective suction openings 26, 28. These flaps 51 may be moved by means of an hydraulic cylinder (not shown). Two different heights 53 are illustrated in figure 6.
  • the height 53 of the openings 26, 28 can be increased or decreased.
  • Alternative guiding plate moving means can be provided. Further, the pivot shaft 45 need not be central to the guiding plate 35.

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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)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP98300098A 1998-01-08 1998-01-08 Tête aspirante pour un appareil de dragage Withdrawn EP0928848A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98300098A EP0928848A1 (fr) 1998-01-08 1998-01-08 Tête aspirante pour un appareil de dragage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98300098A EP0928848A1 (fr) 1998-01-08 1998-01-08 Tête aspirante pour un appareil de dragage

Publications (1)

Publication Number Publication Date
EP0928848A1 true EP0928848A1 (fr) 1999-07-14

Family

ID=8234609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98300098A Withdrawn EP0928848A1 (fr) 1998-01-08 1998-01-08 Tête aspirante pour un appareil de dragage

Country Status (1)

Country Link
EP (1) EP0928848A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012807C2 (nl) * 1999-08-11 2001-02-13 Ballast Nedam Baggeren Bv Inrichting en werkwijze voor het opruimen van reststof na een baggeroperatie.
CN103469838A (zh) * 2013-08-20 2013-12-25 中交广州航道局有限公司 双流道吸淤头
NL2010028C2 (en) * 2012-12-20 2014-06-23 Ihc Holland Ie Bv Cutting dredger.
CN104278657B (zh) * 2014-10-24 2016-03-16 张文博 一种疏浚方法
CN108018902A (zh) * 2017-12-13 2018-05-11 芜湖市皖南造船有限公司 一种绞吸船吸泥嘴
NL2020061B1 (en) * 2017-12-12 2019-06-21 Tideway B V Device and associated method for clearing boulders and other objects from an underwater bottom

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2177110A1 (fr) * 1972-03-17 1973-11-02 Faldi Giovanni
US3774323A (en) * 1971-05-14 1973-11-27 Vaughan Co Composite bucket-hydraulic dredge
US4058914A (en) * 1975-12-15 1977-11-22 Kiss Sandor G Alternate flow suction dredge
US4227323A (en) * 1978-01-20 1980-10-14 Twin Harbor Dredging Co. Hydraulic dredge suction diversion flap
WO1989000630A1 (fr) * 1987-07-22 1989-01-26 O&K Orenstein & Koppel Ag Procede et dispositif de dragage de la vase deposee au fond de ports, voies navigables ou similaires
NL8800129A (nl) * 1988-01-20 1989-08-16 Albert Pieter Berend Uiterwijk Inrichting voor het verwijderen van slib en dergelijke afzettingen van de bodem van een water.
EP0599797A1 (fr) * 1992-11-20 1994-06-01 "Dredging International" Appareil de dragage de fonds de plans d'eau et tête de dragage pour dispositif d'aspiration

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774323A (en) * 1971-05-14 1973-11-27 Vaughan Co Composite bucket-hydraulic dredge
FR2177110A1 (fr) * 1972-03-17 1973-11-02 Faldi Giovanni
US4058914A (en) * 1975-12-15 1977-11-22 Kiss Sandor G Alternate flow suction dredge
US4227323A (en) * 1978-01-20 1980-10-14 Twin Harbor Dredging Co. Hydraulic dredge suction diversion flap
WO1989000630A1 (fr) * 1987-07-22 1989-01-26 O&K Orenstein & Koppel Ag Procede et dispositif de dragage de la vase deposee au fond de ports, voies navigables ou similaires
NL8800129A (nl) * 1988-01-20 1989-08-16 Albert Pieter Berend Uiterwijk Inrichting voor het verwijderen van slib en dergelijke afzettingen van de bodem van een water.
EP0599797A1 (fr) * 1992-11-20 1994-06-01 "Dredging International" Appareil de dragage de fonds de plans d'eau et tête de dragage pour dispositif d'aspiration

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1012807C2 (nl) * 1999-08-11 2001-02-13 Ballast Nedam Baggeren Bv Inrichting en werkwijze voor het opruimen van reststof na een baggeroperatie.
NL2010028C2 (en) * 2012-12-20 2014-06-23 Ihc Holland Ie Bv Cutting dredger.
WO2014098590A1 (fr) * 2012-12-20 2014-06-26 Ihc Holland Ie B.V. Drague à désagrégateur
US9611621B2 (en) 2012-12-20 2017-04-04 Ihc Holland Ie B.V. Cutting dredger
CN103469838A (zh) * 2013-08-20 2013-12-25 中交广州航道局有限公司 双流道吸淤头
CN103469838B (zh) * 2013-08-20 2016-05-18 中交广州航道局有限公司 双流道吸淤头
CN104278657B (zh) * 2014-10-24 2016-03-16 张文博 一种疏浚方法
NL2020061B1 (en) * 2017-12-12 2019-06-21 Tideway B V Device and associated method for clearing boulders and other objects from an underwater bottom
CN108018902A (zh) * 2017-12-13 2018-05-11 芜湖市皖南造船有限公司 一种绞吸船吸泥嘴

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