EP0079404B1 - A single point mooring buoy with rigid arm - Google Patents
A single point mooring buoy with rigid arm Download PDFInfo
- Publication number
- EP0079404B1 EP0079404B1 EP81201274A EP81201274A EP0079404B1 EP 0079404 B1 EP0079404 B1 EP 0079404B1 EP 81201274 A EP81201274 A EP 81201274A EP 81201274 A EP81201274 A EP 81201274A EP 0079404 B1 EP0079404 B1 EP 0079404B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mooring
- vessel
- rigid arm
- buoy
- tension members
- 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
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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
- the invention relates to a mooring system for mooring a vessel on the surface of a body of water comprising a mooring point and a rigid arm structure, connected at one end to said mooring point and at the other end to the respective, ballasted, ends of two tension members, one on each side of the vessel hull.
- Such a mooring system is known from French Patent FR-A-2.420.475, fig. 7 and 8.
- the mooring point is a tower structure erected on the sea bed; the upper end of this tower supports by means of a horizontal pivot axis two rigid arms which are at their respective other ends via respective horizontal pivot axes connected to the vertical tension members of which the other ends are the bow of the vessel interconnected by a further horizontal axis.
- Such a mooring system allows a limited movement in the longitudinal direction of the vessel and provides a restoring force when the vessel moves towards the mooring point and away from it.
- this mooring system is in fact a rigid structure so that rolling movements of the moored vessel impart very severe bending moments on the entire structure resulting in a heavy loading of the various parts and pivots and a rapid wear thereof, the more so because they are constantly subjected to the corrosive influence of the seawater.
- the invention aims to provide an improved mooring system of the abovementioned kind.
- the mooring point is a floating buoy anchored to the floor of the body of water
- the tension members are pivotable tension members such as chains of cables
- the rigid arm structure is Y-shaped, each vessel end thereof being connected to a tension member, the arrangement between the mooring point and the vessel being such as to allow a rotational movement around the longitudinal axis of the Y-shaped structure.
- the rotational movement around the longitudinal axis of Y-shaped structure can be allowed by a limited lateral stability of the buoy, the buoy simply rolling together with the rigid arm structure around the longitudinal axis thereof. Such rolling movements of the vessels are smoothed out by the up and down movements of the arms of the Y-shaped structure. Another, however far more impractical, solution would be to provide an axial rotational connection in the rigid arm.
- the invention is elucidated on the hand of the drawing.
- the figure shows the vessel 1 floating on a body of water 2, and moored by means of two pivotable tension members 6, 7, a rigid arm 15 and a floating mooring buoy 3 which is anchored by one of more anchor chains 5.
- the single point mooring buoy 3 is of a type known as such and consists of a buoy body 4 on which the turntable 8 is free to rotate about the vertical axis A-A of the buoy body 4.
- the buoy body 4 is attached to the floor of the body of water 2 by means of one or more anchor chains 5.
- the rigid arm 15 is in this embodiment attached to the mooring buoy 3 by means of the hinges 9. These hinges 9 allow relative movement between the buoy 3 and the rigid arm 15 about the horizontal axis B-B. Furthermore, the arrangement allows rotational movement of the rigid arm 15 around its longitudinal axis by virtue of the limited lateral stability of the mooring buoy 3. A less practical solution would be to incorporate an.-axial rotational connection in the rigid arm 15 such as the one indicated with reference numeral 10.
- the rigid arm 15 is Y-shaped and the two side arms 11-12 incorporate ballasting arrangements 13, 14. This implies that the two side arms 11, 12 can be ballasted or alternatively deballasted, in which case the rigid arm 15 can become independently buoyant.
- Two pivotable tension members 6, 7 such as chain or cables connect the two side arms 11, 12 to the vessel 1. These tension members 6, 7 run from .the ballasting members 13, 14 upwards through hawses 19 to fixing points 22 on deck 21 of the vessel 1. Any rolling movement of the vessel 1 is thus smoothed out by the up-and-down movement of the side arms 11, 12 causing the midd!e teg of the Y-shaped rigid arm to oscillate about its axis.
- a mooring hawser 18 connects the single point mooring buoy 3 to a fixing point 24 on deck of the vessel 1. This is not essential but provides both an additional mooring facility and a factor of safety in the mooring arrangement.
- the product fluid is carried to the single point mooring buoy 3 by means of the submarine riser 16. It is then transported to the vessel 1 by means of the floating hose string 17.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Description
- The invention relates to a mooring system for mooring a vessel on the surface of a body of water comprising a mooring point and a rigid arm structure, connected at one end to said mooring point and at the other end to the respective, ballasted, ends of two tension members, one on each side of the vessel hull.
- Such a mooring system is known from French Patent FR-A-2.420.475, fig. 7 and 8. In this known mooring system the mooring point is a tower structure erected on the sea bed; the upper end of this tower supports by means of a horizontal pivot axis two rigid arms which are at their respective other ends via respective horizontal pivot axes connected to the vertical tension members of which the other ends are the bow of the vessel interconnected by a further horizontal axis.
- Such a mooring system allows a limited movement in the longitudinal direction of the vessel and provides a restoring force when the vessel moves towards the mooring point and away from it. However, for rolling movements of the vessel this mooring system is in fact a rigid structure so that rolling movements of the moored vessel impart very severe bending moments on the entire structure resulting in a heavy loading of the various parts and pivots and a rapid wear thereof, the more so because they are constantly subjected to the corrosive influence of the seawater.
- The invention aims to provide an improved mooring system of the abovementioned kind. To this end according to the invention the mooring point is a floating buoy anchored to the floor of the body of water, the tension members are pivotable tension members such as chains of cables and the rigid arm structure is Y-shaped, each vessel end thereof being connected to a tension member, the arrangement between the mooring point and the vessel being such as to allow a rotational movement around the longitudinal axis of the Y-shaped structure.
- This results into a mooring system which has, as far as the counteracting of movements toward and away from the mooring point is concerned, the same advantages as the prior art mooring system but of which the structure is subjected to much smaller forces and loadings than in the prior art mooring system; moreover the whole has less pivot points and is considerable simpler. Rolling movements of the vessel do not result into heavy loading and the resultant wear and tear of the structure.
- The rotational movement around the longitudinal axis of Y-shaped structure can be allowed by a limited lateral stability of the buoy, the buoy simply rolling together with the rigid arm structure around the longitudinal axis thereof. Such rolling movements of the vessels are smoothed out by the up and down movements of the arms of the Y-shaped structure. Another, however far more impractical, solution would be to provide an axial rotational connection in the rigid arm.
- It is observed that mooring systems with a floating buoy are known in itself from the Dutch Patent Application 66.00321 and 72.07903. These known mooring systems not only lack the combination of the rigid arm and the ballasted tension members but furthermore the floating buoy has a considerable lateral stability so that the rigid arm is subjected by very heavy forces resulting from rolling movements of the vessel. Consequently this structure must have considerable inherent strength and stiffness and a heavy hinge structure at the end which is connected to the vessel to provide adequate strength and stability, resulting in an expensive construction.
- The invention is elucidated on the hand of the drawing.
- The figure shows the vessel 1 floating on a body of
water 2, and moored by means of twopivotable tension members rigid arm 15 and a floatingmooring buoy 3 which is anchored by one ofmore anchor chains 5. The singlepoint mooring buoy 3 is of a type known as such and consists of abuoy body 4 on which the turntable 8 is free to rotate about the vertical axis A-A of thebuoy body 4. Thebuoy body 4 is attached to the floor of the body ofwater 2 by means of one ormore anchor chains 5. - The
rigid arm 15 is in this embodiment attached to themooring buoy 3 by means of the hinges 9. These hinges 9 allow relative movement between thebuoy 3 and therigid arm 15 about the horizontal axis B-B. Furthermore, the arrangement allows rotational movement of therigid arm 15 around its longitudinal axis by virtue of the limited lateral stability of themooring buoy 3. A less practical solution would be to incorporate an.-axial rotational connection in therigid arm 15 such as the one indicated withreference numeral 10. - The
rigid arm 15 is Y-shaped and the two side arms 11-12 incorporateballasting arrangements side arms rigid arm 15 can become independently buoyant. Twopivotable tension members side arms tension members ballasting members side arms - In addition, a
mooring hawser 18 connects the singlepoint mooring buoy 3 to a fixing point 24 on deck of the vessel 1. This is not essential but provides both an additional mooring facility and a factor of safety in the mooring arrangement. - The product fluid is carried to the single
point mooring buoy 3 by means of thesubmarine riser 16. It is then transported to the vessel 1 by means of the floatinghose string 17.
Claims (2)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8181201274T DE3174847D1 (en) | 1981-11-17 | 1981-11-17 | A single point mooring buoy with rigid arm |
EP81201274A EP0079404B2 (en) | 1981-11-17 | 1981-11-17 | A single point mooring buoy with rigid arm |
OA57840A OA07247A (en) | 1981-11-17 | 1982-11-05 | Single point anchor structure. |
ES1982268488U ES268488Y (en) | 1981-11-17 | 1982-11-15 | SINGLE POINT MOORING STRUCTURE. |
DK507682A DK154335C (en) | 1981-11-17 | 1982-11-15 | DEVICE FOR MOVING A VESSEL |
PH28146A PH21279A (en) | 1981-11-17 | 1982-11-16 | Single-point mooring structure |
BR8206620A BR8206620A (en) | 1981-11-17 | 1982-11-16 | ATTRACTION STRUCTURE TO ATTACH A VESSEL ON THE SURFACE OF A WATER MASS |
NO823830A NO154954C (en) | 1981-11-17 | 1982-11-16 | FORTOEYNINGSKONSTRUKSJON. |
JP57201788A JPS5897585A (en) | 1981-11-17 | 1982-11-17 | Mooring arrangement |
SG313/88A SG31388G (en) | 1981-11-17 | 1988-05-21 | A single point mooring buoy with rigid arm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP81201274A EP0079404B2 (en) | 1981-11-17 | 1981-11-17 | A single point mooring buoy with rigid arm |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0079404A1 EP0079404A1 (en) | 1983-05-25 |
EP0079404B1 true EP0079404B1 (en) | 1986-06-18 |
EP0079404B2 EP0079404B2 (en) | 1992-03-25 |
Family
ID=8188163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81201274A Expired - Lifetime EP0079404B2 (en) | 1981-11-17 | 1981-11-17 | A single point mooring buoy with rigid arm |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0079404B2 (en) |
JP (1) | JPS5897585A (en) |
BR (1) | BR8206620A (en) |
DE (1) | DE3174847D1 (en) |
DK (1) | DK154335C (en) |
ES (1) | ES268488Y (en) |
NO (1) | NO154954C (en) |
OA (1) | OA07247A (en) |
PH (1) | PH21279A (en) |
SG (1) | SG31388G (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2547789B1 (en) * | 1983-06-21 | 1988-06-24 | Emh | LOCKING SYSTEM FOR A BODY FLOATING LARGE DIMENSIONS ESPECIALLY AT SEA |
FR2551721B2 (en) * | 1983-09-14 | 1988-12-09 | Emh | LOCKING SYSTEM FOR A BODY FLOATING LARGE DIMENSIONS ESPECIALLY AT SEA |
DE3344117C2 (en) * | 1983-12-07 | 1985-10-31 | Blohm + Voss Ag, 2000 Hamburg | Permanent one-point anchoring of floating structures on the high seas |
JPS61163083A (en) * | 1985-01-14 | 1986-07-23 | Mitsubishi Heavy Ind Ltd | Single point mooring apparatus |
GB2198407B (en) * | 1986-06-19 | 1990-01-17 | Peter William George Burridge | Bearing assembly |
NL191731C (en) * | 1987-06-15 | 1996-05-03 | Single Buoy Moorings | Mooring system. |
NL8800927A (en) * | 1988-04-11 | 1989-11-01 | Single Buoy Moorings | MOORING SYSTEM WITH QUICK COUPLING. |
EP1283159A1 (en) * | 2001-08-06 | 2003-02-12 | Single Buoy Moorings Inc. | Hydrocarbon fluid transfer system |
RU2422318C2 (en) * | 2005-12-22 | 2011-06-27 | Блювотер Энерджи Сервисиз Б.В. | System for vessel mooring at sea |
WO2014043636A1 (en) * | 2012-09-14 | 2014-03-20 | The Government of the United State of America as represented by the Secretary of the Navy | Magnetically attracted connector system and method |
CN110203331A (en) * | 2019-06-14 | 2019-09-06 | 上海外高桥造船有限公司 | A kind of hawser shoe for rigging hatch |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155069A (en) * | 1962-08-17 | 1964-11-03 | B P Tanker Company Ltd | Mooring arrangements for ships |
US3556170A (en) * | 1964-01-10 | 1971-01-19 | Fmc Corp | Mooring and fluid-transferring method |
US3442245A (en) * | 1968-04-08 | 1969-05-06 | Us Army | Rigid arm mooring means |
FR2133307A5 (en) * | 1971-04-16 | 1972-11-24 | Elf Entr Rech Activit | |
US4176615A (en) * | 1977-11-21 | 1979-12-04 | Amtel, Inc. | Mooring attachment for single point mooring terminals |
IT1122786B (en) * | 1979-08-17 | 1986-04-23 | Magnanini Umberto | TEMPORARY OR PERMANENT ROTATING MOORING STRUCTURE FOR SHIPS OR VESSELS |
-
1981
- 1981-11-17 DE DE8181201274T patent/DE3174847D1/en not_active Expired
- 1981-11-17 EP EP81201274A patent/EP0079404B2/en not_active Expired - Lifetime
-
1982
- 1982-11-05 OA OA57840A patent/OA07247A/en unknown
- 1982-11-15 ES ES1982268488U patent/ES268488Y/en not_active Expired
- 1982-11-15 DK DK507682A patent/DK154335C/en not_active IP Right Cessation
- 1982-11-16 NO NO823830A patent/NO154954C/en not_active IP Right Cessation
- 1982-11-16 BR BR8206620A patent/BR8206620A/en not_active IP Right Cessation
- 1982-11-16 PH PH28146A patent/PH21279A/en unknown
- 1982-11-17 JP JP57201788A patent/JPS5897585A/en active Pending
-
1988
- 1988-05-21 SG SG313/88A patent/SG31388G/en unknown
Also Published As
Publication number | Publication date |
---|---|
PH21279A (en) | 1987-09-28 |
DK507682A (en) | 1983-05-18 |
BR8206620A (en) | 1983-10-04 |
NO823830L (en) | 1983-05-18 |
JPS5897585A (en) | 1983-06-10 |
ES268488U (en) | 1983-05-16 |
OA07247A (en) | 1984-08-31 |
SG31388G (en) | 1993-01-29 |
DK154335C (en) | 1989-06-12 |
NO154954B (en) | 1986-10-13 |
DE3174847D1 (en) | 1986-07-24 |
EP0079404A1 (en) | 1983-05-25 |
EP0079404B2 (en) | 1992-03-25 |
NO154954C (en) | 1987-01-21 |
DK154335B (en) | 1988-11-07 |
ES268488Y (en) | 1983-12-01 |
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