EP2817209A1 - Connecteur de chaîne - Google Patents

Connecteur de chaîne

Info

Publication number
EP2817209A1
EP2817209A1 EP13704827.8A EP13704827A EP2817209A1 EP 2817209 A1 EP2817209 A1 EP 2817209A1 EP 13704827 A EP13704827 A EP 13704827A EP 2817209 A1 EP2817209 A1 EP 2817209A1
Authority
EP
European Patent Office
Prior art keywords
chain
upper ends
locking
housing
arms
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.)
Granted
Application number
EP13704827.8A
Other languages
German (de)
English (en)
Other versions
EP2817209B1 (fr
Inventor
Christian Bauduin
Jean-Pierre Benoit
Jean-Yves TOGGIANI
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.)
Single Buoy Moorings Inc
Original Assignee
Single Buoy Moorings Inc
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
Priority claimed from US13/718,702 external-priority patent/US8820258B2/en
Application filed by Single Buoy Moorings Inc filed Critical Single Buoy Moorings Inc
Publication of EP2817209A1 publication Critical patent/EP2817209A1/fr
Application granted granted Critical
Publication of EP2817209B1 publication Critical patent/EP2817209B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B63B21/18—Stoppers for anchor chains

Definitions

  • a vessel or other floating body is commonly moored to the sea floor by a chain that passes though a chain connector on the floating body and down to the sea floor.
  • the tension in each chain may be very high, such as 2000 tons.
  • tension in the chain had to be reduced before the chain could be disconnected, and large forces were required.
  • the force required to disconnect the chain while it is under tension should be moderate.
  • the chain connector should be of moderate size. A chain connector of moderate size that allowed emergency disconnection of a chain using only a moderate force, such as no more than 5% of the chain tension for the disconnection, would be of value.
  • a chain connector holds a chain that may be subjected to a very high tension such as 2000 tons, and that allows the chain to be disconnected from a floating body or the like by applying only a moderate release force such 50 tons.
  • the chain extends though a housing and one of its chain links is supported by ratchets.
  • the ratchets are mounted on first levers in the form of arms that have upper ends pivotally connected to the chain connector housing and that have free lower ends.
  • the chain connector also has a pair of second levers, or locking dogs, that have lower ends forming cams that hold or release the arm lower ends.
  • the locking dogs have upper ends that are held together by pins. When the pins are raised, they release the locking dog upper ends. This allows the locking dog upper ends to move apart, so the cams on the locking dog lower ends release the arms to pivot apart and release the ratchets to release the chain.
  • the ratchets are pivotally supported on the arms.
  • the ratchets have concave upper ends that receive the convex lower ends of alternate chain links, to distribute the load.
  • Fig. 1 is an isometric view of a chain connector, with an unsupported chain extending though a passage therein.
  • Fig. 2 is an isometric view of the chain connector of Fig. 1 , with an upper part of the housing removed for clarity and with the chain supported.
  • Fig. 3 is a sectional side view of the chain connector of Fig. 1 with the left side of Fig. 3 taken on a centerline of the connector and the right side taken from in front of the locking dogs.
  • Fig. 4 is a front elevation view of the chain connector of Fig. 3.
  • Fig. 5 is a side view of the chain connector of Fig. 4.
  • Fig. 1 shows a chain connector 10 of the invention, which has a passage 12 though which a chain 14 usually extends.
  • the chain connector 10 is usually mounted on a floating body such as a vessel, with the chain extending down to the sea floor and anchored thereat to limit drift of the vessel.
  • the chain is useful in a variety of applications. Occasionally , the chain must be disconnected from the chain connector, as to allow the replacement of a mooring leg, maintenance, or to allow the vessel to drift or sail away from its moored location. In that case, the chain may be under a high tension such as 2000 tons.
  • the present chain connector is designed to disconnect the tensioned chain from the chain connector using only a moderate force such as 10% of the chain tension for a chain connector of moderate length.
  • Fig. 3 shows that the chain is supported by upper ends 22 of ratchets 24, 26.
  • the ratchets are pivotally mounted about axes 30, 32 on arms 34, 36,
  • the arms have upper ends 35 pivotally mounted on the chain connector housing 38, about axes 40, 42.
  • the arms have lower ends 44 that are prevented from moving away from a connector axis 46 by cams 50 that are formed on locking dogs 52, 54 (Fig. 1).
  • the locking dogs each has a lower end that forms a cam 50 and has an upper end 60.
  • the disconnection process is performed by energizing an activating device, preferably an hydraulic jack 70 (Fig. 1) which has a cylinder 72 mounted on the housing and a piston 74 that can be forcefully moved up.
  • the upper end of the piston holds two pins 58. As shown in Fig. 3, each pin 58, lies against the upper end 60 of one of the locking dogs 52, 54.
  • the combinations of arms and locking dogs enable the chain to be released by using only a moderate force such as an upward force of 50 tons applied by the jack 70. Instead of using the arms 34,36 combined with the locking dogs 52, 54, it would be possible to use very long arms. However, it is important to minimize the size of the chain connector and the presence of the locking dogs limits the height of the chain connector. The fact that the chain can be released while under high tension allows a release without first reducing chain tension.
  • the housing has a center plane 90 (Fig. 5) and the chain has aligned links such as 92 that are widest along the center plane and has alternate perpendicular links such as 94 that are widest along a plane that is perpendicular to the center plane.
  • the ratchets (Fig. 3) have concave upper faces 95 that are curved about two axes to distribute the downward force of a chain link over a wide area.
  • the ratchets engage only the aligned links 92.
  • the ratchets are pivoted to move against and away from the chain by the aligned chain links 92 pushing below the ratchets when pulling on the chain.
  • Levers 102 that engage housing surface 104 are pivotally mounted on the arms and help control arm position.
  • the invention provides a chain connector that enables its disconnection from a chain that is under a high tension (on the order of magnitude of 2000 tons), by applying only a moderate force that is less than 10% and preferably less than 5% of the chain tension.
  • the chain connector includes ratchets mounted on arms that have upper ends pivotally mounted on the control housing. The lower ends of the arms are held against pivoting apart by cams that are located on locking dogs.
  • the locking dogs have upper ends that are held close to the housing axis by pins on a jack. The jack can be operated to raise the pins out of engagement with the locking dogs to allow the arms and dogs to pivot apart and thereby release the chain.
  • the invention provides a chain connector of moderate size, which can disconnect from a chain while the chain is under high tension.
  • the connector includes arms with upper ends that are pivotally mounted on the housing and with free lower arm ends.
  • the connector also includes locking dogs with lower ends that are pivotally mounted on the housing and with free upper ends. The lower ends of the locking dogs form cams that release the arm free lower ends to pivot apart when the dog upper ends are released to move apart.
  • Ratchets that engage the links have upper faces that are curved about two perpendicular axes to provide large area engagement with the links.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Ship Loading And Unloading (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

Connecteur de chaîne servant à maintenir une chaîne (14) pouvant amarrer un vaisseau jusqu'au fond de la mer sous éventuellement 2 000 tonnes de tension, qui peut être rapidement déconnecté en cas d'urgence par l'application d'une force de déconnexion modérée, par exemple 50 tonnes. La chaîne est maintenue par des rochets (24, 26) qui sont montés sur des bras (34, 36). Les bras ont des extrémités supérieures (35) qui sont montées de manière pivotante sur un logement (38) et ont des extrémités inférieures libres (44), maintenues par des cames (50) sur des griffes de blocage (52) dont les extrémités inférieures (51) sont montées de manière pivotante sur le logement et dont les extrémités supérieures (60) sont libres. Un actionneur hydraulique (70) possède des axes (58) qui viennent en prise avec les extrémités supérieures des griffes de verrouillage pour empêcher l'écart de pivotement entre les bras et les griffes jusqu'à ce que les extrémités supérieures de la griffe de blocage (60) soient levées.
EP13704827.8A 2012-02-21 2013-01-23 Connecteur de chaîne Not-in-force EP2817209B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261601331P 2012-02-21 2012-02-21
US13/718,702 US8820258B2 (en) 2012-12-18 2012-12-18 Chain connector
PCT/IB2013/000082 WO2013124717A1 (fr) 2012-02-21 2013-01-23 Connecteur de chaîne

Publications (2)

Publication Number Publication Date
EP2817209A1 true EP2817209A1 (fr) 2014-12-31
EP2817209B1 EP2817209B1 (fr) 2016-04-20

Family

ID=47722333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13704827.8A Not-in-force EP2817209B1 (fr) 2012-02-21 2013-01-23 Connecteur de chaîne

Country Status (4)

Country Link
EP (1) EP2817209B1 (fr)
CA (1) CA2865128C (fr)
RU (1) RU2617878C2 (fr)
WO (1) WO2013124717A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8820258B2 (en) * 2012-12-18 2014-09-02 Single Buoy Moorings, Inc Chain connector
RU2647826C1 (ru) * 2014-06-12 2018-03-19 Блюуотер Энерджи Сёвисиз Б.В. Устройство цепного стопора и цепи и используемый в нем цепной стопор
NO339306B1 (en) * 2015-05-04 2016-11-21 Scana Offshore Vestby As Mooring arrangment and a chain stopper assembly
WO2016180866A1 (fr) 2015-05-12 2016-11-17 Single Buoy Moorings Inc. Ensemble de liaison de ligne d'amarre destiné à relier une ligne d'amarre à une structure flottante
JP7014498B2 (ja) 2015-06-26 2022-02-01 シングル ブイ ムーリングス インコーポレイテッド 浮遊式風力タービン組立体、ならびにそのような浮遊式風力タービン組立体を係留するための方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU70504A1 (ru) * 1947-03-13 1947-11-30 Н.К. Кочетов Стопорное устройство дл т говых цепей, преимущественно корных
US3289626A (en) * 1965-08-19 1966-12-06 Mcdermott & Co J Ray Chain stoppers
US3859946A (en) * 1973-04-19 1975-01-14 Peter G Hammerschlag Under load releasable chain stoppers
SU1118579A1 (ru) * 1982-04-09 1984-10-15 Предприятие П/Я А-3780 Устройство дл креплени и отдачи коренного конца корной цепи
US5809925A (en) * 1997-07-30 1998-09-22 Smith Berger Marine, Inc. Chain stopper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2013124717A1 *

Also Published As

Publication number Publication date
CA2865128A1 (fr) 2013-08-29
RU2014138018A (ru) 2016-04-10
EP2817209B1 (fr) 2016-04-20
RU2617878C2 (ru) 2017-04-28
WO2013124717A1 (fr) 2013-08-29
CA2865128C (fr) 2019-07-02

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