WO2025201740A1 - Procédé d'intégration de la flottabilité dans une ligne d'amarrage et ligne d'amarrage obtenue au moyen de celui-ci - Google Patents

Procédé d'intégration de la flottabilité dans une ligne d'amarrage et ligne d'amarrage obtenue au moyen de celui-ci

Info

Publication number
WO2025201740A1
WO2025201740A1 PCT/EP2025/054298 EP2025054298W WO2025201740A1 WO 2025201740 A1 WO2025201740 A1 WO 2025201740A1 EP 2025054298 W EP2025054298 W EP 2025054298W WO 2025201740 A1 WO2025201740 A1 WO 2025201740A1
Authority
WO
WIPO (PCT)
Prior art keywords
mooring line
float sheet
float
sheet
grooves
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.)
Pending
Application number
PCT/EP2025/054298
Other languages
English (en)
Inventor
Greg Mozsgai
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.)
Bridon International Ltd
Original Assignee
Bridon International Ltd
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 Bridon International Ltd filed Critical Bridon International Ltd
Publication of WO2025201740A1 publication Critical patent/WO2025201740A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
    • D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
    • D04C1/06—Braid or lace serving particular purposes
    • D04C1/12—Cords, lines, or tows
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/20—Buoyant ropes, e.g. with air-filled cellular cores; Accessories therefor
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
    • B63B2021/203—Mooring cables or ropes, hawsers, or the like; Adaptations thereof
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/03—Shape features
    • D10B2403/033—Three dimensional fabric, e.g. forming or comprising cavities in or protrusions from the basic planar configuration, or deviations from the cylindrical shape as generally imposed by the fabric forming process
    • D10B2403/0333—Three dimensional fabric, e.g. forming or comprising cavities in or protrusions from the basic planar configuration, or deviations from the cylindrical shape as generally imposed by the fabric forming process with tubular portions of variable diameter or distinct axial orientation

Definitions

  • the invention relates to a method to make a mooring line buoyant over its entire length or over a part thereof.
  • the invention also relates to the product resulting from said method.
  • the density is at least 60 or at least 80 or even above 100 kg/m 3 .
  • the density is best below 400 kg/m 3 , or below 300 kg/m 3 or even below 200 kg/m 3 .
  • Density is measured as per ISO 845.
  • the float sheet is of cuboid shape and has a thickness ‘t’ expressed in millimetre. The thickness of the sheet is the smallest dimension of the cuboid shape.
  • the compressive strength of the float sheet material determines to what depth the float sheet can resist the water column pressure. As roughly every 10 meter below sea water level the pressure increases with 1 bar (0.1 MPa), a float sheet with a compressive strength of 9 MPa (90 bar), can withstand a depth of 900 meter. Thereafter it will collapse, crush and buoyancy is lost. This by itself does not need to be a problem: it can also be a desired property of the mooring line, to lose buoyancy from a certain depth onward.
  • the float sheet material is selected to have a compressive strength expressed in megapascal that one hundredth of the intended crush depth expressed in meters.
  • the grooves are oriented lengthwise of said float sheet i.e. the grooves define the length dimension.
  • the width dimension is perpendicular to the length dimension and the thickness.
  • the width dimension is equal to or about equal to the circumference of a circle with diameter ‘d+2xf i.e. the width is equal to irx(d+2xt), wherein ‘IT’ represents Archimedes’ constant.
  • the grooves can be formed in the float sheet material by any of the following techniques:
  • the grooves can have a straight ( V) or skewed (
  • the number of grooves ‘N’ is 10 or more, preferably 15 to 20, but not larger than 60.
  • the number of grooves determines how well the float sheet can follow the outer diameter of the mooring line.
  • the number of grooves determines the bottom groove angle that cannot be less than 360/N degree, more preferably is 400/N, but can go up to 720/N.
  • float sheets are prepared in advance with a number of grooves. Once the diameter of the mooring line to be provided with buoyancy is known, the width of the floating sheet is adapted by selecting the needed number of grooves to surround the ropes and cracking off the not necessary grooves. [0021] In a following step, the float sheet is circumferentially bent around the mooring line, with the first side - with the grooves in - towards the mooring line. The grooves are aligned with the axis of the mooring line.
  • the self-buoyant mooring line is provided with float sheet material that collapses from a specific dept onward.
  • float sheet material that collapses from a specific dept onward.
  • this limit can be set at will by selection of the material: for 800 meter a compressive strength of 8 MP is needed, the need compressive stress as expressed in MPa, being the depth divided by a hundred.
  • FIGURE 1 illustrates the method according the first aspect of the invention.
  • FIGURE 2 is a schematic illustration of a float sheet as needed for the method.
  • a mooring line 101 of diameter ‘d’ 180 mm is provided in a first step 102 .
  • the mooring line is of conventional make and comprises 12 sub-ropes held together and parallel by a braided jacket.
  • the sub-ropes consist of three strands twisted together, the strands consist of rope yarns twisted together.
  • the rope yarns are made of polyethylene.
  • the rope has a linear mass density of 28 kg per meter.
  • the float sheet is temporarily held by a tape 114, before it enters the braider section 108.
  • a jacket is braided by two interwoven yarn bundles 116 that hold the float sheet in place.
  • the final rope diameter is 250 mm.
  • Over a total rope length of 213 meter, 203 meter is covered with float sheets. The mass per meter over the total length has increased to 29.8 kg/m due to the presence of the float sheets and the jacket.
  • FIG. 3 shows a cross section 300 of the resulting self-buoyant mooring line at one of the floating sheets.
  • the mooring line 301 has a diameter ‘d’. It is surrounded by the floating sheet 312 that is circumferentially bent around the mooring line. The grooves have collapsed to lines 322. The total diameter of the assembly has become d+2xt.
  • the floating sheet 312 is held in place by the jacket 318.
  • the resulting self-buoyant mooring line has in air a full rope mass of about 6350 kg, that is a weight force of 62 300 N. In the water it floats with its centre at around 30 mm under water level. When fully pulled under water the self-buoyant mooring line experiences an upward force of 116 newton per meter. When held under water over its complete length at the ends, the self-buoyant mooring line will take the curve of an inverted catenary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)

Abstract

L'invention concerne un procédé pour rendre une ligne d'amarrage flottante. Le procédé permet de cintrer de manière circonférentielle des feuilles flottantes autour d'une ligne d'amarrage. Les feuilles flottantes sont pourvues de rainures qui permettent le cintrage de la feuille d'écoulement autrement rigide et permettent d'obtenir un collier rempli avec peu d'espace libre entre les deux. Ensuite, la feuille flottante cintrée est maintenue de manière permanente sur la ligne d'amarrage au moyen d'une chemise. La feuille flottante peut éventuellement être temporairement fixée à la ligne d'amarrage par des agrafes ou des bandes. La ligne d'amarrage flottante ainsi obtenue présente moins de 10 % d'espace libre restant dans la feuille flottante.
PCT/EP2025/054298 2024-03-25 2025-02-18 Procédé d'intégration de la flottabilité dans une ligne d'amarrage et ligne d'amarrage obtenue au moyen de celui-ci Pending WO2025201740A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP24250001 2024-03-25
EP24250001.5 2024-03-25

Publications (1)

Publication Number Publication Date
WO2025201740A1 true WO2025201740A1 (fr) 2025-10-02

Family

ID=90731529

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/054298 Pending WO2025201740A1 (fr) 2024-03-25 2025-02-18 Procédé d'intégration de la flottabilité dans une ligne d'amarrage et ligne d'amarrage obtenue au moyen de celui-ci

Country Status (1)

Country Link
WO (1) WO2025201740A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341758A (en) * 1991-09-16 1994-08-30 Strickland David A Surfing rope
CN201228334Y (zh) * 2008-07-08 2009-04-29 李井义 浮绳
WO2018009997A1 (fr) * 2016-07-15 2018-01-18 Assunção Toledo Marco Antonio Agencement structural pour corde nautique
US10633790B2 (en) 2015-01-15 2020-04-28 Calorflex, AS Mooring member
EP4223926A1 (fr) 2018-06-19 2023-08-09 Bexco N.V. Câble d'amarrage sous-marin

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5341758A (en) * 1991-09-16 1994-08-30 Strickland David A Surfing rope
CN201228334Y (zh) * 2008-07-08 2009-04-29 李井义 浮绳
US10633790B2 (en) 2015-01-15 2020-04-28 Calorflex, AS Mooring member
WO2018009997A1 (fr) * 2016-07-15 2018-01-18 Assunção Toledo Marco Antonio Agencement structural pour corde nautique
EP4223926A1 (fr) 2018-06-19 2023-08-09 Bexco N.V. Câble d'amarrage sous-marin

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