US3777372A - Cutter suction dredge having parallelogram linkage wave compensator - Google Patents

Cutter suction dredge having parallelogram linkage wave compensator Download PDF

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Publication number
US3777372A
US3777372A US00165125A US3777372DA US3777372A US 3777372 A US3777372 A US 3777372A US 00165125 A US00165125 A US 00165125A US 3777372D A US3777372D A US 3777372DA US 3777372 A US3777372 A US 3777372A
Authority
US
United States
Prior art keywords
pontoon
cutter
spud
parallelogram linkage
ladder
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
Application number
US00165125A
Other languages
English (en)
Inventor
J Laarman
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.)
IHC Holland NV
Original Assignee
IHC Holland 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 IHC Holland NV filed Critical IHC Holland NV
Application granted granted Critical
Publication of US3777372A publication Critical patent/US3777372A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/06—Floating substructures as supports
    • E02F9/062—Advancing equipment, e.g. spuds for floating 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
    • E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes

Definitions

  • a cutter dredge comprises a pontoon pivotally mounted on a spud driven into the sea bed, by means of a guide element vertically movable on the spud.
  • the pontoon carries a cutter ladder pivotally on its end opposite the spud; and the lower end of the ladder is maintained at a predetermined elevation despite the wave motion of the spud and pontoon, by means of a parallelogram linkage having the pontoon as the lower side and having parallel sides upstanding from opposite ends of the pontoon and pivotally connected to the pontoon.
  • the side of the parallelogram linkage at the cutter end of the pontoon is secured to the pontoon.
  • the opposite side of the parallelogram linkage can be either a rod upstanding from the guide element, or a portion of the spud itself.
  • the upper ends of the two upright sides are interconnected by a horizontal cable or stay.
  • the invention relates to a cutter suction dredge comprising a pontoon which, by means of a pivotal guide element, at its stern embraces in a rotatable and vertically adjustable manner a spud to be driven into the floor of a body of water, and a cutter ladder pivotally mounted on the foremost end of the pontoon, the angular position of said cutter ladder being adjustable by devices provided on'the pontoon, which devices make it possible to control the operative depth of the cutter.
  • a cutter suction dredge of this type is generally known in the art.
  • a disadvantage of these known cutter suction dredges is that while operating in turbulent waters the cutter will not always be kept in'its operative cut, i.e., the operative radius of the cutter dredger about the spud will vary, because of the vertical movements of the pontoon due to the wash of the waves or the swell.
  • This object is achieved according to the invention by the fact that the cutter ladder, which is permitted to rotate freely, is connected with the spud by means of a parallelogram guiding arrangement.
  • the parallelogram guiding arrangement preferably consists of a first upstanding rod conncted at its lower end with the cutter ladder.
  • the first rod is connected at its upper end with a second upstanding rod by means of an element which is pivotal at its junctions with the two rods.
  • This second upstanding rod extends substantially parallel with the first rod and is connected with a guide element that rides on an upright spud, while the points at which the two rods are connected with one another are at the same elevation.
  • a pontoon extends between the guide element and the lower end of the first rod.
  • the second rod may either be rigidly secured to the I guide element or may beform'ed by th'e'spud, or by'an extension thereof.
  • the junction of the connecting element 6 with the rod 7 has to be vertically adjustable as well with respect. to the spud, while it has to be kept at a distance from the pontoon for instance by means of a rod.
  • the cutter With a cutter dredger constructed in the manner described above, the cutter will always be in its operative position even if the pontoon moves upwardly and downwardly or pitches.
  • the cutter by its own weight will cause the first rod, and thus the second rod, as well, to be tilted through a given angle, as a result of which the spud will either be tilted directly or the guide element, connected to the second rod and embracing the'spud, will exert a bending moment on the spud, causing the spud to be tilted, so that the pontoon will move in the horizontal direction, which corresponds with the displacement of the cutter in the horizontal direction which would take place if there was a freely movable cutter ladder.
  • the first rod forms preferably one side of a triangle which, in its normal position, extends upwardly, a second side of said triangle being formed by the cutter ladder.
  • an element for instance a hydraulic jack
  • cutter ladder the length of this element being adjustable, while the first rod is pivotally connected with the cutter ladder.
  • a pontoon l which floats on the surface of the water and to which is pivotally secured a cutter ladder'2, said cutter ladder terminating downwardly in a lower end which rests on the floor 3 of a body of water and which is comprised by a cutter element, not shown in the drawing.
  • a pivotally secured rod structure 4 In the proximity of the pivot of the cutter ladder 2 there is provided a pivotally secured rod structure 4, the upper portion of which is connected with the lower portion of the ladder 2 by means of the rod or rope 5.
  • the rod structure 4 is connected at its upper end with the upper portion of the rod structure 7 by a stay 6, which rod structure 7 is pivotally connected at 8 with the stern portion of the pontoon 1.
  • an adjustable guide element 9 which embraces a spud 10 which is driven at its lower portion in the bottom 3.
  • the arrow 11 indicates schematically the operationof a hydraulic jack, for instance, which is mounted between the pontoon and the-rod 7. If the pontoon starts to heave, i.e., starts to perform upward .and downward motions'parallel in itself, the entire cutter dredger will take the position shown by dotted lines in the drawing upon a given vertical movementof the pontoon 1.
  • a cutter suction dredger comprising a buoyant pontoon, an upright spud to be driven into the floor of a body of water, a guide element vertically movable on the spud, th guide element being pivotally interconnected with the stern of the pontoon, and a cutter ladder pivotally mounted on the other end of the pontoon;
  • the improvement which comprises parallelogram linkage carried by the dredge, means maintaining said cutter ladder at a predetermined angle to one side of said parallelogram linkage, means maintaining the side of said parallelogram linkage opposite said one side para]- lel to said spud, said pontoon comprising a third side of said parallelogram linkage, the lower end of said one side of said parallelogram linkage being pivotally connected to said other end of said pontoon, a horizontal element pivotally connected at its ends between the upper ends of said one side and said opposite side of said parallel linkage, and means interconnecting the upper end of said one side of said parallelogram linkage and a portion of said cutter ladder
  • a dredge as claimed in claim 1 and means to adjust the angle between said opposite side of said parallelogram linkage and said pontoon.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Ladders (AREA)
  • Earth Drilling (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
US00165125A 1970-07-22 1972-07-22 Cutter suction dredge having parallelogram linkage wave compensator Expired - Lifetime US3777372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7010848A NL7010848A (en)) 1970-07-22 1970-07-22

Publications (1)

Publication Number Publication Date
US3777372A true US3777372A (en) 1973-12-11

Family

ID=19810638

Family Applications (1)

Application Number Title Priority Date Filing Date
US00165125A Expired - Lifetime US3777372A (en) 1970-07-22 1972-07-22 Cutter suction dredge having parallelogram linkage wave compensator

Country Status (8)

Country Link
US (1) US3777372A (en))
JP (1) JPS5620235B1 (en))
AU (1) AU455372B2 (en))
BE (1) BE770339A (en))
DE (1) DE2137218C3 (en))
FR (1) FR2103189A5 (en))
GB (1) GB1333394A (en))
NL (1) NL7010848A (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197016A1 (en) * 1985-03-26 1986-10-08 Rune Regnér Method and apparatus for steering a boat, for instance when laying hoses under water
US20060123671A1 (en) * 2004-12-14 2006-06-15 Cornelis Heuvelman Cutter suction dredge

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408404A (en) * 1980-09-08 1983-10-11 Deepsea Ventures, Inc. Pivotable articulated support shoe for hydraulic nozzle
EP3409838B1 (de) * 2017-05-31 2021-06-16 General Dynamics European Land Systems-Bridge Systems GmbH Schwimmkörper zur ausbildung von brückenabschnitten

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US388253A (en) * 1888-08-21 Dredging-machine
US407044A (en) * 1889-07-16 Hydraulic dredg i ng-mach i n e
US428141A (en) * 1890-05-20 Dredging-machine
US826096A (en) * 1905-11-11 1906-07-17 Bucyrus Co Excavating machinery.
US2917851A (en) * 1956-12-03 1959-12-22 Ellicott Machine Corp Spud construction for dredges
US3171219A (en) * 1962-10-17 1965-03-02 Ellicott Machine Corp Dredge and tunnel construction apparatus comprising a downwardly inclined housing mounting a cutter and motor therefor
US3253357A (en) * 1963-05-27 1966-05-31 Allard Pierre Jean-Ma Theodore Underwater excavating device
US3470633A (en) * 1967-06-20 1969-10-07 Beloit Pipe & Dredge Inc Amphibious dredge
US3579872A (en) * 1968-11-05 1971-05-25 Ocean Science & Eng Dredging apparatus with surge compensating means
US3656449A (en) * 1970-06-01 1972-04-18 Herbert W Mead Propelling means for a dredge

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US388253A (en) * 1888-08-21 Dredging-machine
US407044A (en) * 1889-07-16 Hydraulic dredg i ng-mach i n e
US428141A (en) * 1890-05-20 Dredging-machine
US826096A (en) * 1905-11-11 1906-07-17 Bucyrus Co Excavating machinery.
US2917851A (en) * 1956-12-03 1959-12-22 Ellicott Machine Corp Spud construction for dredges
US3171219A (en) * 1962-10-17 1965-03-02 Ellicott Machine Corp Dredge and tunnel construction apparatus comprising a downwardly inclined housing mounting a cutter and motor therefor
US3253357A (en) * 1963-05-27 1966-05-31 Allard Pierre Jean-Ma Theodore Underwater excavating device
US3470633A (en) * 1967-06-20 1969-10-07 Beloit Pipe & Dredge Inc Amphibious dredge
US3579872A (en) * 1968-11-05 1971-05-25 Ocean Science & Eng Dredging apparatus with surge compensating means
US3656449A (en) * 1970-06-01 1972-04-18 Herbert W Mead Propelling means for a dredge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197016A1 (en) * 1985-03-26 1986-10-08 Rune Regnér Method and apparatus for steering a boat, for instance when laying hoses under water
US20060123671A1 (en) * 2004-12-14 2006-06-15 Cornelis Heuvelman Cutter suction dredge

Also Published As

Publication number Publication date
AU455372B2 (en) 1974-11-21
FR2103189A5 (en)) 1972-04-07
JPS5620235B1 (en)) 1981-05-12
GB1333394A (en) 1973-10-10
DE2137218A1 (de) 1972-01-27
AU3118571A (en) 1973-01-18
BE770339A (fr) 1972-01-24
DE2137218C3 (de) 1979-11-29
NL7010848A (en)) 1972-01-25
DE2137218B2 (de) 1979-04-12

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