WO2016039630A1 - Fairing for rope - Google Patents
Fairing for rope Download PDFInfo
- Publication number
- WO2016039630A1 WO2016039630A1 PCT/NO2015/050154 NO2015050154W WO2016039630A1 WO 2016039630 A1 WO2016039630 A1 WO 2016039630A1 NO 2015050154 W NO2015050154 W NO 2015050154W WO 2016039630 A1 WO2016039630 A1 WO 2016039630A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fairing
- sheath
- protruding
- ribbon
- coated
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 210000004209 hair Anatomy 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/209—Jackets or coverings comprising braided structures
Definitions
- the present invention relates to a sheath comprising so-called fairing for various types of drag or towing cables, hawsers and ropes for use in maritime environments.
- towing there are two types of two types of towing, namely directly behind the ship or horizontally from the sides of the vessel, such as e.g. during trawling or seismic shooting. Towing is particularly challenging when done horizontally.
- a drag cable having a circular profile experiences high fluid resistance or «drag» in the water.
- higher towing speeds are often desirable or necessary in order to avoid loss of time and/or increased cost, e.g. when operating across larger areas.
- High fluid resistance means on the one hand that the tensile load on the cable grows large. This entails higher strain on the equipment, increased cost of towing the equipment (in the form of increased fuel cost), and reduced security of operation.
- fairings In order to provide as low fluid resistance as possible for drag cables, it is common to use so-called fairings.
- fairings There are different types of fairings, such as streamlined, wing- shaped members of synthetic material attached to a rope or cable, among others. Another type would be hair-like materials attached in a rope or cable.
- a potential problem when using hair-like materials is the high exposure to wear of these hairs during use.
- the hairs are «eaten away» during towing in a maritime environment.
- the hair-like material will also develop into «lint».
- «Lint» «linty» «linting» and the like is used herein to describe hair-like structures, ribbons etc. that become worn down, split and frayed. This is considered a disadvantage as it reduces the effect of the fairing in water and contributes to increased wear. Also, the lint may easily entangle and form bundles.
- the hairs, possibly also woven or braided ribbons form loops which are then cut so that hairs or ribbons hang down from the rope.
- a protective sheath may be braided of yarn.
- the braided sheath may thus be comprised of multifilament fibers, monofilament fibers and micro tape laid into yarn.
- Such solutions leave a certain «space» between the sheath and the hawser and inside the sheath as such. This also gives room for the intrusion of particles.
- the hawser will thus experience a certain «drag» when being pulled horizontally.
- NO 314459 relates to a hawser comprising a core of parallel or braided core cords and a sheath of braided-on sheath elements, (some of) the sheath elements being made of woven ribbons comprising predominantly parallel filaments connected together by transversal strings.
- the object of the present invention is to remedy one or more of the above disadvantages.
- Fig. 1 shows an embodiment of the present invention.
- Fig. 1 shows an embodiment of the present invention, where woven or braided ribbons 1 protrude from the sheath 2 of a drag cable, hawser 3 or the like, each ribbon 1 being treated in such a way that linting is either completely avoided or substantially delayed.
- each protruding ribbon 1 is coated with a plastic or other material forming a film or coating around each protruding ribbon 1.
- each protruding ribbon 1 may be treated with an agent, e.g. a fully or partially curing adhesive or impregnating agent, which fully or partially penetrates each ribbon 1 and renders it non- linting.
- an agent e.g. a fully or partially curing adhesive or impregnating agent, which fully or partially penetrates each ribbon 1 and renders it non- linting.
- the fully or partially curing adhesive or impregnating agent does not render the protruding ribbon too rigid or inflexible, since this could potentially impair the intended functionality of the fairing. Under certain circumstances, however, such rigid fairings have proven to be able to provide better streamlining properties.
- particles, elements or substances may be added to the coating, the adhesive or impregnating agent, which endow the fairing with improved or preferred streamlining properties.
- These may be particles, elements or substances which make the fairing smoother, or which interrupt or affect the flow characteristics around each ribbon 1 in a positive way.
- These may also be particles, elements or substances which give each ribbon prolonged service life or desired frictional properties.
- the woven or braided ribbons 1 may be braided into the sheath 2 so that they form loops. In a subsequent step, the loops are cut so that they form protruding ribbons 1.
- the protruding ribbons 1 are then dipped in a tub or passed along a spraying zone, so that each protruding ribbon is coated or impregnated with the desired material.
- the drag cable 3 is coiled with coated or impregnated fairing ribbons 1 around a drum, and is ready for distribution/sale.
- the ribbons 1 may also be coated before they are attached to the rope or cable 3.
- the coating is herein described as an adhesive, an impregnating agent and/or a plastic material.
- Plastic material is to be understood as indicating any suitable material forming a covering or penetrating coating, the coating being flexible and ductile, having adhesive properties, being resistant to mechanical and chemical wear as well as UV radiation.
- the material may comprise polymeric materials, rubber materials, resins, etc. When the fairing is made up of a compact, solid ribbon, the material must have properties which render the fairing sufficiently strong and durable.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Professional, Industrial, Or Sporting Protective Garments (AREA)
- Details Of Garments (AREA)
- Reinforcement Elements For Buildings (AREA)
- Ropes Or Cables (AREA)
Abstract
The present invention relates to a sheath (2) for an elongated, load-bearing body (3), said sheath (2) comprising several elongated sheath elements braided together around at least a portion of the elongated body, said sheath being equipped with a protruding fairing (1). The protruding fairing (1) comprises or is coated or impregnated with a material which prevents the protruding fairing from linting.
Description
Fairing for rope
The present invention relates to a sheath comprising so-called fairing for various types of drag or towing cables, hawsers and ropes for use in maritime environments.
In this context, there are two types of two types of towing, namely directly behind the ship or horizontally from the sides of the vessel, such as e.g. during trawling or seismic shooting. Towing is particularly challenging when done horizontally.
At higher towing speeds (over approx. 4 knots), a drag cable having a circular profile experiences high fluid resistance or «drag» in the water. However, higher towing speeds are often desirable or necessary in order to avoid loss of time and/or increased cost, e.g. when operating across larger areas. High fluid resistance means on the one hand that the tensile load on the cable grows large. This entails higher strain on the equipment, increased cost of towing the equipment (in the form of increased fuel cost), and reduced security of operation. In order to provide as low fluid resistance as possible for drag cables, it is common to use so-called fairings. There are different types of fairings, such as streamlined, wing- shaped members of synthetic material attached to a rope or cable, among others. Another type would be hair-like materials attached in a rope or cable.
A potential problem when using hair-like materials is the high exposure to wear of these hairs during use. The hairs are «eaten away» during towing in a maritime environment. The hair-like material will also develop into «lint». «Lint», «linty», «linting» and the like is used herein to describe hair-like structures, ribbons etc. that become worn down, split and frayed. This is considered a disadvantage as it reduces the effect of the fairing in water and contributes to increased wear. Also, the lint may easily entangle and form bundles. The hairs, possibly also woven or braided ribbons, form loops which are then cut so that hairs or ribbons hang down from the rope. When using ribbons, these too may get frayed quickly and form lint. It takes some time before the ribbon will get linty, and this time in itself accounts for a prolonged service life. Ribbons tend to have longer durability than hairs when it comes to linting. In addition to the factors mentioned in the above, which include properties during use, wear and short service life, there are also production aspects to be addressed. Regardless of the type of fairing chosen for use, various possible variants and improvements may be decisive for the cost and complexity of production, which in turn will impact the cost for the customer.
It is generally known to use multifilament fibers, monofilament fibers and micro tape to form yarn. The yarns may be laid into a strand, which in turn may be laid/braided to obtain a hawser. The hawser comprises three or more strands.
Around the hawser, a protective sheath may be braided of yarn. The braided sheath may thus be comprised of multifilament fibers, monofilament fibers and micro tape laid into yarn. Such solutions leave a certain «space» between the sheath and the hawser and inside the sheath as such. This also gives room for the intrusion of particles. During use, the hawser will thus experience a certain «drag» when being pulled horizontally.
The sheath may also be placed on top of other cores, such as cables of plastics or steel etc. NO 314459 relates to a hawser comprising a core of parallel or braided core cords and a sheath of braided-on sheath elements, (some of) the sheath elements being made of woven ribbons comprising predominantly parallel filaments connected together by transversal strings.
The object of the present invention is to remedy one or more of the above disadvantages.
According to the present invention, this is achieved by an arrangement according to independent claim 1. Further advantageous or alternative embodiments are outlined in the dependent claims.
In the following, a detailed description of an advantageous embodiment is provided with reference to the accompanying drawings, in which
Fig. 1 shows an embodiment of the present invention.
It is known to use woven or braided ribbons protruding from the sheath of a drag cable, hawser or the like, to thereby form a fairing. As it takes the ribbon some time before it becomes frayed and forms lint, such a fairing lasts longer. The time it takes for the ribbon to become linty can be added to the regular service life of a linty fairing. Also, it has turned out that a fairing that has not yet become linty can behave as well or better than a linty fairing. Thus, it is desirable to prevent the ribbon from linting.
Fig. 1 shows an embodiment of the present invention, where woven or braided ribbons 1 protrude from the sheath 2 of a drag cable, hawser 3 or the like, each ribbon 1 being treated in such a way that linting is either completely avoided or substantially delayed.
According to an embodiment of the present invention, each protruding ribbon 1 is coated with a plastic or other material forming a film or coating around each protruding ribbon 1.
Alternatively, each protruding ribbon 1 may be treated with an agent, e.g. a fully or partially curing adhesive or impregnating agent, which fully or partially penetrates each ribbon 1 and renders it non- linting. In this case, it may be desirable that the fully or partially curing adhesive or impregnating agent does not render the protruding ribbon too rigid or inflexible, since this could potentially impair the intended functionality of the fairing. Under certain circumstances, however, such rigid fairings have proven to be able to provide better streamlining properties.
According to another embodiment of the present invention, particles, elements or substances may be added to the coating, the adhesive or impregnating agent, which endow the fairing with improved or preferred streamlining properties. These may be particles, elements or substances which make the fairing smoother, or which interrupt or affect the flow characteristics around each ribbon 1 in a positive way. These may also be particles, elements or substances which give each ribbon prolonged service life or desired frictional properties. According to a possible process of production, the woven or braided ribbons 1 may be braided into the sheath 2 so that they form loops. In a subsequent step, the loops are cut so that they form protruding ribbons 1. The protruding ribbons 1 are then dipped in a tub or passed along a spraying zone, so that each protruding ribbon is coated or impregnated with the desired material. After drying and optional subsequent treatment steps, the drag cable 3 is coiled with coated or impregnated fairing ribbons 1 around a drum, and is ready for distribution/sale. Thus, the invention according to the present invention does not involve any particularly labor-intensive or complicating process steps which would require large investments or restructuring/extension of existing production systems. This results in a considerably improved and attractive product that can be sold at an acceptable extra cost for the end user.
The ribbons 1 may also be coated before they are attached to the rope or cable 3. The coating is herein described as an adhesive, an impregnating agent and/or a plastic material. Plastic material is to be understood as indicating any suitable material forming a covering or penetrating coating, the coating being flexible and ductile, having adhesive properties, being resistant to mechanical and chemical wear as well as UV radiation. The material may comprise polymeric materials, rubber materials, resins, etc. When the fairing is made up of a compact, solid ribbon, the material must have properties which render the fairing sufficiently strong and durable.
Claims
C l a i m s
Sheath (2) for an elongated, load-bearing body (3), said sheath comprising several elongated sheath elements braided together around at least a portion of the elongated body, said sheath being equipped with a protruding fairing (1),
c h a r a c t e r i z e d i n that the protruding fairing (1) comprises or is coated or impregnated with a material which prevents the protruding fairing from linting.
Sheath according to claim 1, where the protruding fairing (1) is woven, braided or sawn into ribbon such that it does become linty.
Sheath according to claim 1, where the protruding fairing (1) is coated with a plastic material.
Sheath according to claim 1, where the protruding fairing (1) is impregnated with a fully or partially curing adhesive.
Sheath according to one of the preceding claims, where the protruding fairing (1) is coated or impregnated with a material, adhesive or substance containing particles, elements or other substances which provide each ribbon with longer service life or desired frictional properties.
Sheath according to claim 1, where the protruding fairing (1) comprises a compact, solid ri
Sheath according to claim 1, where the protruding fairing (1) comprises a film of the same material as in the sheath.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20141103 | 2014-09-12 | ||
NO20141103A NO20141103A1 (en) | 2014-09-12 | 2014-09-12 | Streamlining cover in protective sheath for an elongated, load-bearing body |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016039630A1 true WO2016039630A1 (en) | 2016-03-17 |
Family
ID=55459302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2015/050154 WO2016039630A1 (en) | 2014-09-12 | 2015-09-04 | Fairing for rope |
Country Status (2)
Country | Link |
---|---|
NO (1) | NO20141103A1 (en) |
WO (1) | WO2016039630A1 (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3440993A (en) * | 1967-12-26 | 1969-04-29 | Us Navy | Cable fairing |
US3440991A (en) * | 1965-01-29 | 1969-04-29 | Us Navy | Hair faired cable |
FR2461776A1 (en) * | 1979-07-24 | 1981-02-06 | Chiers Chatillon Gorcy Trefil | Wire cable provided with radial vanes - to reduce visible wake in marine applications such as the towing of sonar detectors |
EP0245065A2 (en) * | 1986-05-02 | 1987-11-11 | Raychem Limited | Fairing |
WO2003054291A1 (en) * | 2001-12-20 | 2003-07-03 | Offshore & Trawl Supply As | Cable |
WO2006086338A2 (en) * | 2005-02-11 | 2006-08-17 | Gore Enterprise Holdings, Inc. | Fluoropolymer fiber composite bundle |
US20070202328A1 (en) * | 2006-02-24 | 2007-08-30 | Davis Gregory A | High tenacity polyolefin ropes having improved cyclic bend over sheave performance |
WO2011015485A1 (en) * | 2009-08-04 | 2011-02-10 | Dsm Ip Assets B.V. | Coated high strength fibers |
EP2481847A1 (en) * | 2011-01-31 | 2012-08-01 | DSM IP Assets B.V. | UV-Stabilized high strength fiber |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3707836A (en) * | 1971-04-29 | 1973-01-02 | Rochester Corp | Method and apparatus for attaching fairing strips to cables |
US4030401A (en) * | 1975-06-04 | 1977-06-21 | Wall Industries, Inc. | Faired article |
US20060207414A1 (en) * | 2005-03-16 | 2006-09-21 | Nye Richard E | Rope |
-
2014
- 2014-09-12 NO NO20141103A patent/NO20141103A1/en not_active Application Discontinuation
-
2015
- 2015-09-04 WO PCT/NO2015/050154 patent/WO2016039630A1/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3440991A (en) * | 1965-01-29 | 1969-04-29 | Us Navy | Hair faired cable |
US3440993A (en) * | 1967-12-26 | 1969-04-29 | Us Navy | Cable fairing |
FR2461776A1 (en) * | 1979-07-24 | 1981-02-06 | Chiers Chatillon Gorcy Trefil | Wire cable provided with radial vanes - to reduce visible wake in marine applications such as the towing of sonar detectors |
EP0245065A2 (en) * | 1986-05-02 | 1987-11-11 | Raychem Limited | Fairing |
WO2003054291A1 (en) * | 2001-12-20 | 2003-07-03 | Offshore & Trawl Supply As | Cable |
WO2006086338A2 (en) * | 2005-02-11 | 2006-08-17 | Gore Enterprise Holdings, Inc. | Fluoropolymer fiber composite bundle |
US20070202328A1 (en) * | 2006-02-24 | 2007-08-30 | Davis Gregory A | High tenacity polyolefin ropes having improved cyclic bend over sheave performance |
WO2011015485A1 (en) * | 2009-08-04 | 2011-02-10 | Dsm Ip Assets B.V. | Coated high strength fibers |
EP2481847A1 (en) * | 2011-01-31 | 2012-08-01 | DSM IP Assets B.V. | UV-Stabilized high strength fiber |
Also Published As
Publication number | Publication date |
---|---|
NO20141103A1 (en) | 2016-03-14 |
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