Abstract:
Ankerwinden (10) dienen zum Ablassen und Aufholen von Ankern mit ihren Ankerketten. Die Ankerwinden (10) verfügen über einen Antrieb, womit zumindest das Aufholen des Ankers mit der Ankerkette motorisch erfolgt. Unter widrigen Umständen kann es vorkommen, dass die Leistung des Antriebs zum Aufholen des Ankers nicht ausreicht. Dann besteht die Gefahr, dass die Ankerkette von der Ankerwinde (10) abgezogen wird, was schlimmstenfalls zum Verlust des Ankers führt. Zur Vermeidung der geschilderten Nachteile sieht die Erfindung eine Ankerwinde (10) vor, deren Bandbremse (15) gemäß einer ersten Betätigungsart manuell betätigbar ist und im Notfall durch eine zweite Betätigungsart automatisch betätigt werden kann, beispielsweise durch einen von einer Steuerung betätigten Hydraulikzylinder (28). Der Hydraulikzylinder (28) zieht die Betätigungseinrichtung (21 ) der Bandbremse (15) im Notfall an, um so quasi einen "Notstop" einzuleiten, der die Gefahr des unbeabsichtigten Abziehens der Ankerkette von der Ankerwinde (10) bei hohen Lasten beseitigt.
Abstract:
A rotary chain jack may include a frame, a dual chain wheel rotatably coupled to the frame, and a stopper assembly mechanically coupled to the frame. The stopper assembly may include latches. The stopper assembly may be positioned to selectively engage a chain passing over the dual chain wheel. The rotary chain jack may be used to moor offshore structures.
Abstract:
A mooring connector assembly (3) has a body (10) arranged to be pivotally mounted to a structure (1),such as a tethered buoy,to be moored for movement about a pivot axis,At least a part of the body extends below the pivot axis when so mounted and oriented for use. A line stopper (17) is mounted to the part of the body which extends below the pivot axis in use and is operative to retain a mooring line (2) relative to the body. The body is configured to receive a tensioner (20) for tensioning a mooring line (2) retained by the stopper such that the tensioner urges the line at a point which is below the pivot axis when the body is oriented for use. The body may be an elongate tube (10) pivotally connected to a structure to be moored (1) at one end and fitting with a chain stopper (17) at the opposite end. The tube is configured to receive a chain tensioner (20) between the chain stopper (17) and pivot axis.
Abstract:
L'invention concerne un stoppeur de chaîne (1) pour unité flottante comprenant un berceau (4) coopérant avec une unité flottante, un membre mâle (6) accueilli au sein dudit berceau (4), un conduit de guidage (7) coopérant avec ledit membre mâle (6), agencé pour guider les maillons d'une chaîne (2). Ledit berceau (4) et ledit membre mâle (6) comprennent des épaulements (4e, 6e), agencés mutuellement pour matérialiser une liaison rotule. L'invention concerne en outre un système d'ancrage associé comportant un stoppeur de chaîne (1) selon l'invention.
Abstract:
L'invention concerne un dispositif arrêt de chaîne de mouillage comportant : - un boîtier de verrouillage (50) pourvu d'un conduit (53) à l'intérieur duquel une chaîne de mouillage (2) est apte à coulisser, ledit boîtier comprenant un moyen de liaison à une structure flottante (1) configurée pour orienter l'axe dudit conduit dans l'axe de tension (A) de ladite chaîne, ledit boîtier intégrant des verrous (52) configurés pour s'opposer au coulissement de ladite chaîne dans ledit conduit, - un moyen pour mesurer la tension dans ladite chaîne de mouillage, ledit moyen de mesure étant intégré audit boîtier de verrouillage, se caractérisant par le fait que se caractérisant par le fait que se caractérisant par le fait que se caractérisant par le fait que ledit moyen de mesure comprend : - au moins une chambre (6) constituée d'une enveloppe fermée déformable, laquelle chambre est remplie d'un liquide, - au moins une pièce d'appui (7) montée mobile dans le boîtier de verrouillage (50), ladite pièce d'appui étant placée entre les verrous (52) et la chambre (6), ladite pièce d'appui agissant sur la paroi de l'enveloppe de ladite chambre pour mettre en pression le liquide qu'elle contient, ladite pièce d'appui étant agencée de manière à ce que les efforts exercés par ladite chaîne de mouillage (2) sur lesdits verrous (52) entrainent le déplacement de ladite pièce d'appui et la mise en pression de ladite chambre, - au moins un capteur de pression (8) configuré pour mesurer la pression du liquide dans ladite chambre fermée (6).
Abstract:
A chain stopper assembly for a turret mooring system configured for real-time measuring of the tension in a mooring chain, a method for real-time measuring of the tension in the mooring chain, and a method for in situ changing of the load cell in the chain stopper assembly. The chain stopper assembly comprising a chain stopper body; a mounting bracket for supporting the chain stopper body from opposing sides of the chain stopper body via respective saddle blocks coupling the chain stopper body to the mounting bracket; and at least one load cell securing at least one of the saddle blocks to the mounting bracket, for measuring the load between the saddle block and the mounting plate as a measure of the tension in the mooring chain.
Abstract:
Apparatus (10) for connecting a chain (4, 8) to the non-rotatable part (2) of a single point mooring structure which defines a first axis (V) about which the rotatable part (1) of the structure can rotate (said apparatus), comprising a securement member (11, 12, 13) for receiving and securing the end of a chain (4, 8) to the single point mooring structure and being pivotally attached to the single point mooring structure for rotation about a second axis (H) which is perpendicular to the first axis (V), and about a third axis (M) which is perpendicular to the second axis (H) and which is movable relative to the first axis (V).
Abstract:
A buoyant offshore platform (102) for supporting a renewable energy system (116) in a body of water (104) is provided, the body of water having a surface (106) and a bed (110). The buoyant offshore platform comprises a base portion (118) for submerging below said surface of said body of water; a top portion for remaining above said surface of said body of water; one or more mooring lines (108) for fixing the buoyant offshore platform to said bed of said body of water; and a tensioning means (130) for applying tension to the one or more mooring lines. The buoyant offshore platform further comprises a floating configuration in which the buoyant offshore platform is positioned substantially floating on said surface of said body of water; wherein the buoyant offshore platform comprises a deployed configuration in which the base portion is submerged beneath said surface of said body of water and the top portion remains above said surface of said body of water. In use, the tensioning means is arranged to apply tension to the one or more mooring lines fixed between the buoyant offshore platform and said bed of said body of water such that the buoyant offshore platform transitions between the floating configuration and the deployed configuration. The described platform aims to provide a safer and more efficient mode of deploying a buoyant offshore platform to a partially submerged operating configuration.
Abstract:
Systems and methods for tensioning mooring lines are provided. The systems include an in-line tensioner that may include a removable chainwheel, a tail chain disconnecting table configured for disconnection of a tail chain and docking of an ROV, a chain guide having low- friction pads that reduce frictional engagement between the in-line tensioner and mooring chains, and a target link stopper that is configured to stop movement of the mooring line at a predetermined location, such that the mooring line has a predetermined length and such that a predetermined link of the mooring line is positioned within a gripping zone of latches of the in-line tensioner.
Abstract:
Mooring tensioning arrangement (10) on a vessel (60), comprising a moonpool (20) having a through running vertical channel with an upper moonpool opening (22) in proximity to a deck (62) of the vessel (60), and a bottom moonpool opening (24) open to surrounding sea (30). A winch (14) is located above the moonpool (20), wherein a first anchor wire pennant (42) runs from the winch (14), over a stern (64) of the vessel (60) and into sea (30), and a second anchor wire pennant (46) runs from the winch (14), through the moonpool (20) and into the sea (30). A wire/chain stopper (18) securing the second anchor wire pennant (46) is placed in the moonpool (20), and the bottom moonpool opening (24) is curved to match bending 0radius and to provide a transition in direction of the second anchor wire pennant (46).