EP0152975B1 - Mooring device - Google Patents

Mooring device Download PDF

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Publication number
EP0152975B1
EP0152975B1 EP85200087A EP85200087A EP0152975B1 EP 0152975 B1 EP0152975 B1 EP 0152975B1 EP 85200087 A EP85200087 A EP 85200087A EP 85200087 A EP85200087 A EP 85200087A EP 0152975 B1 EP0152975 B1 EP 0152975B1
Authority
EP
European Patent Office
Prior art keywords
rigid
tower
mooring device
tension members
mooring
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
Application number
EP85200087A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0152975A1 (en
Inventor
Willem Jan Van Heijst
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.)
Bluewater Terminal Systems NV
Original Assignee
Bluewater Terminal Systems 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 Bluewater Terminal Systems NV filed Critical Bluewater Terminal Systems NV
Publication of EP0152975A1 publication Critical patent/EP0152975A1/en
Application granted granted Critical
Publication of EP0152975B1 publication Critical patent/EP0152975B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • B63B22/025—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids and comprising a restoring force in the mooring connection provided by means of weight, float or spring devices

Definitions

  • This invention relates to a device for mooring a floatable body, such as a ship, to a mooring tower, comprising two tension members, rotatable around a horizontal axis and supported by the tower one at each side thereof and each tensioned by a weight, the respective free ends of said members each being connected through a rigid arm to the floating body.
  • Such a mooring device is known from the French Patent Specification 2,420,475.
  • the tension members are in their whole rigid structures.
  • the moored floating body such as a tanker
  • wave movements and currents occur which tend to bring about such movements; preventing them results into a very heavy loading of the total mooring structure.
  • EP A-0 105 976 in the name of applicant and constituting prior art in the sense of Art.
  • 54(3) EPC discloses a mooring system in which the tension members are supported by the tower in such a way that they can move in all directions so that the abovementioned heavy loads cannot occur.
  • the upper ends thereof must lie a considerable distance from the tower which results in a complicated and costly structure.
  • the invention aims to provide a mooring system having the advantages of the above described known mooring systems but without the disadvantages thereof.
  • each of said tension members is flexible such that the ends are displaceable in any direction substantially perpendicular to the length of the tension members and such that the ends exhibit a lower resistance to displacement in the direction of the rigid arm than in the direction perpendicular thereto.
  • each of said tension members is constructed from at least two interconnected parts at least one of which is formed or suspended in such a way that this member can exclusively carry out movements in the direction of the rigid arm.
  • each of said tension members is a rigid structure, and the lower part is of such a structure or connected to the upper part in such a way that the end thereof connected to the rigid arm is able to execute movements in the direction to and from the tower.
  • the lower parts of the tension members consist of chains or similar members. They can also consist of rigid elements each interconnected through at least one second hinge axis which crosses the first one perpendicularly, to the respective upper part.
  • each rigid element can rotate around an axis, coaxially therewith, with respect to the upper part.
  • the horizontal hinge axis are carried by a jib which, rotatable. around a vertical axis, is supported by the tower.
  • each tension member consists of a triangle structure made up by two chains orsimilar members, interconnected at their lower ends, or an embodiment in which the lower part of each tension member is a rigid structure, connected to the rigid arm via a horizontal pivot axis parallel to the jib.
  • reference numeral 1 denotes a mooring tower resting on the seabed 2; this tower carries at the upper end 3, rotatable around a vertical axis 4, a jib 5. To this jib 5 are connected, each one rotatable around a horizontal axis 6, the respective upper parts 7 of tension members which are as a whole denoted by reference numerals 8, 9. These upper parts 7 are rigid structures. Each of these tension members carries at the lower end a weight 10 and is furthermore with the lower end connected to one end of a rigid arm 11 of which the other end is connected to a floating body to be connected to the mooring device, in this case a vessel 12.
  • the tension members 8 each have less stiffness against displacements in the direction of the rigid arms 11 than in the direction perpendicular thereto.
  • the lower parts 13,14 respectively of the tension members 8 and 9 respectively are of such a structure or connected in such a way with the upper part 7 that the lower ends 15, 16 respectively thereof, connected to the rigid arm 11, can execute movements in the direction of the tower and away from the tower, such as indicated by the arrows 17.
  • the ship 12 can execute appreciable movements parallel to its longitudinal axis without the danger of damaging the tower 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Jib Cranes (AREA)
  • Bridges Or Land Bridges (AREA)
EP85200087A 1984-02-06 1985-01-28 Mooring device Expired EP0152975B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8400367A NL8400367A (nl) 1984-02-06 1984-02-06 Meerinrichting.
NL8400367 1984-02-06

Publications (2)

Publication Number Publication Date
EP0152975A1 EP0152975A1 (en) 1985-08-28
EP0152975B1 true EP0152975B1 (en) 1987-06-10

Family

ID=19843438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85200087A Expired EP0152975B1 (en) 1984-02-06 1985-01-28 Mooring device

Country Status (9)

Country Link
EP (1) EP0152975B1 (da)
JP (1) JPS60233219A (da)
AU (1) AU585760B2 (da)
CA (1) CA1226741A (da)
DK (1) DK50985A (da)
NL (1) NL8400367A (da)
NO (1) NO850421L (da)
OA (1) OA07943A (da)
SG (1) SG20188G (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8601716A (nl) * 1986-07-01 1988-02-01 Single Buoy Moorings Afmeerinrichting.
NL8602526A (nl) * 1986-10-08 1988-05-02 Single Buoy Moorings Werkeiland, dat door middel van op trek belaste spanorganen is verankerd en is voorzien van middelen voor het afmeren van een schip.
NL9401753A (nl) * 1994-10-21 1996-06-03 Heerema Group Services Bv Meersamenstel.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420475A1 (fr) * 1978-03-24 1979-10-19 Emh Systeme d'amarrage d'un corps flottant tel qu'un navire
EP0096119B2 (en) * 1982-06-11 1992-07-22 Bluewater Terminal Systems N.V. A rigid arm single point mooring system for vessels
EP0105976A1 (en) * 1982-10-15 1984-04-25 Bluewater Terminal Systems N.V. A single point mooring tower structure with rigid arm

Also Published As

Publication number Publication date
OA07943A (fr) 1987-01-31
JPS60233219A (ja) 1985-11-19
DK50985A (da) 1985-08-07
EP0152975A1 (en) 1985-08-28
NL8400367A (nl) 1985-09-02
DK50985D0 (da) 1985-02-05
CA1226741A (en) 1987-09-15
SG20188G (en) 1988-07-08
AU585760B2 (en) 1989-06-22
AU3842585A (en) 1985-08-15
NO850421L (no) 1985-08-07

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