Submersible mooring pulley having detachable chain wheel

Abstract

The present invention relates to a submersible mooring pulley having a separable chain wheel, wherein: the connection of a mooring chain extending from an underwater anchor can be reliably made; and t

Description

Invention Title: SUBMERSIBLE MOORING PULLEY HAVING DETACHABLE CHAIN WHEEL Technical Field

[0001] The present disclosure relates to a submersible mooring pulley applied to an offshore structure mooring system. More particularly, the present disclosure relates to a submersible mooring pulley having a detachable chain wheel, the submersible mooring pulley being capable of allowing a mooring chain extending from an anchor in the water to be stably connected to the submersible mooring pulley and capable of performing bi-directional movement control of a fairlead chain extending from an offshore structure, thereby facilitating adjustment of mooring tension of the offshore structure in normal times and disconnection of the fairlead chain in emergency situations, and the submersible mooring pulley being capable of allowing separation of a chain wheel in contact with the fairlead chain, thereby facilitating maintenance of the chain wheel and reducing operation costs of an offshore structure mooring system by selectively applying one chain wheel to a plurality of submersible mooring pulleys. Background Art

[0002] In the case of offshore structures, such as offshore wind turbines, they are inevitably affected by waves and currents due to their location on the sea.

[0003] Therefore, an offshore structure is moved due to the effects of waves and currents, and when the offshore structure is excessively moved, this situation may not only lead to the loss thereof, but also lead to damage by collapse.

[0004] Various mooring devices or mooring systems, such as those disclosed in Korean Patent Application Publication No. 10-2014-0126022, are used to secure an offshore structure to a point on the sea.

[0005] At this point, a chain extending from the offshore structure toward the water on the water, more specifically, a fairlead chain is connected to a 'chain stopper' or 'pulley equipped with a stopper' . The chain may be moved and tightened while being pulled in one direction in the connected state, thereby performing adjustment of mooring tension of the offshore structure to stably perform mooring the offshore structure.

[0006] However, a chain stopper or a pulley equipped with a stopper that is applied to a conventional offshore structure mooring system can control movement of the fairlead chain only in one direction, e.g., can pull the fairlead chain in a direction from the water toward the surface of the water. Therefore, there may be difficulty in adjusting mooring tension of the offshore structure and it is not easy to remove connection of the fairlead chain without support of a large fleet when relocation of the offshore structure is required due to emergency situations such as typhoons, and it is difficult to quickly respond the situation, which is a problem.

[0007] Furthermore, a chain stopper or a pulley with a stopper applied to the conventional offshore structure mooring system has a chain wheel fixed to a body. Therefore, since the chain wheel cannot be separated from the body without disassembly of the fixed part of the chain wheel, maintenance of the chain wheel is difficult. In particular, the chain wheel should be provided in a chain stopper or a pulley with a stopper, thereby increasing mooring system operating costs.

[0008] For the above reasons, in this field, attempts are being made to develop a chain stopper or a pulley to which a stopper is provided for an offshore structure mooring system to facilitate adjustment of offshore structure mooring tension, disconnection of the fairlead chain in emergency situations, maintenance of the chain wheel, and reduce mooring system operation costs of the offshore structure, but satisfactory results have not been obtained to date.

[0009]

[0010]     Documents of Related Art

[0011]     Patent Document

[0012] (Patent Document 1) Korean Patent Application Publication No. 10-2014-0126022 Disclosure Technical Problem

[0013] The present disclosure has been made keeping in mind the above problems occurring in the related art, and the present disclosure is intended to propose a submersible mooring pulley having a detachable chain wheel, the submersible mooring pulley being capable of allowing a mooring chain extending from an anchor in the water to be stably connected to the submersible mooring pulley and capable of performing bi-directional movement control of a fairlead chain extending from an offshore structure, thereby facilitating adjustment of mooring tension of the offshore structure in normal times and disconnection of the fairlead chain in emergency situations, and the submersible mooring pulley being capable of allowing separation of a chain wheel in contact with the fairlead chain, thereby facilitating maintenance of the chain wheel and reducing operation costs of an offshore structure mooring system by selectively applying one chain wheel to a plurality of submersible mooring pulleys . Technical Solution

[0014] In order to achieve the above objective, the present disclosure proposes,

[0015] a submersible mooring pulley having a detachable chain wheel, the submersible mooring pulley including: a body arranged in the water, and including a support block between opposite side plates of one end part thereof, a longitudinal first surface and a longitudinal second surface of the support block being inclined; and a chain wheel configured to rotate forwards and reversely on a rotation shaft penetrating through opposite side plates between a first end and a second end of the body, and supporting a part of a fairlead chain extending from an offshore structure on the water, wherein the body may include: slot holes respectively formed on opposite side plates; operating pieces rotatably arranged at respective openings of the slot holes and configured to open and close the openings of the slot holes in response to rotation directions thereof; and movable means configured to push and pull ends of the operating pieces to rotate the operating pieces in one direction, and the chain wheel may have one end and the other end of the rotation shaft that may be inserted into one and the other of the slot holes, and the chain wheel may be fixed to the body as the openings of the slot holes are closed by rotation in one direction of the operating pieces, and the chain wheel may be separated from the body as the chain wheel is removed via the openings of the slot holes that are opened by rotation in the other direction of the operating pieces . Advantageous Effects

[0016] In the submersible mooring pulley having a detachable chain wheel according to the present disclosure, the openings of the slot holes respectively formed on the opposite side plates of the body are opened and closed in response to rotation directions of the operating pieces by driving of the movable means, and one end and the other end of the rotation shaft of the chain wheel are inserted into one and the other of the slot holes. When the openings of the slot holes are opened by rotation in one direction of the operating pieces by driving of the movable means, one end and the other end of the rotation shaft of the chain wheel may be removed from the slot holes, thereby allowing the chain wheel to be separated from the body. Therefore, it is possible to facilitate maintenance of the chain wheel, and particularly to reduce provision costs of the chain wheel by selectively applying one chain wheel to a plurality of submersible mooring pulleys, thereby reducing operation costs of an offshore structure mooring system.

[0017] Furthermore, the submersible mooring pulley having a detachable chain wheel according to the present disclosure includes: the pair of movable members rotatably arranged between the longitudinal first end and the longitudinal second end of the body and arranged at the front and the rear with a gap therebetween, wherein one of both the movable members is brought into contact with one of the inclined portions of the support block while rotating forwards and reversely within the predetermined angle range by protrusion and retraction of the rod of the cylinder to control longitudinal movement of the fairlead chain; and the wireless controller arranged on one surface of the body to control operation of the movable members in response to a remote signal input from the outside space. Since bi-directional, more specifically, longitudinal movement control of the fairlead chain can be performed by operation of the movable members performed in response to control of the wireless controller, with easy adjustment of mooring tension of the offshore structure in normal times, the moored state of the offshore structure can be stably maintained and disconnection of the fairlead chain can be simply performed in emergency situations, so that relocation of the offshore structure can be easily performed.

[0018] Furthermore, according to the present disclosure, the submersible mooring pulley having a detachable chain wheel includes the pulling member connected to the movable members. Therefore, operation of the movable members can be performed also by pulling the pulling member so that bi-directional movement control of the fairlead chain can be efficiently performed even in unusual situations of the wireless controller.

[0019] Furthermore, the body of the submersible mooring pulley having a detachable chain wheel according to the present disclosure includes the binding member. Therefore, the mooring chain extending from the anchor is bound using the binding member thus the body and the mooring chain may be simply connected to each other, thereby facilitating connection work of the mooring chain. Description of Drawings

[0020] FIG. 1 is a perspective view showing the appearance of a submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0021] FIG. 2 is a view of an example showing a connection of the submersible mooring pulley having a detachable chain wheel according to the present disclosure, to a fairlead chain and a mooring chain.

[0022] FIG. 3 is a sectional view in one direction showing a coupling part between a body and a chain wheel of the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0023] FIG. 4 is a view of an example showing coupling of the chain wheel to the body in the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0024] FIG. 5 is a view of an example showing separation of the chain wheel from the body in the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0025] FIG. 6 is a view of an example showing movement in one direction of a fairlead chain in the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0026] FIG. 7 is a view of an example showing movement in the other direction of the fairlead chain in the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0027] FIG. 8 is a view of an example showing binding of the mooring chain by a binding member, of the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0028] FIG. 9 is a view of an example showing binding by a link member of the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0029] FIG. 10 is a view of an example showing mooring the offshore structure by using an offshore structure mooring system equipped with the submersible mooring pulley having a detachable chain wheel according to the present disclosure.

[0030] FIG. 11 is a view of an example showing movement in the other direction of the fairlead chain in the submersible mooring pulley having a detachable chain wheel according to the present disclosure. Best Mode

[0031] Hereinbelow, the present disclosure will be described in detail with reference to accompanying drawings.

[0032]

[0033] As shown in FIG. 1, a submersible mooring pulley A having a detachable chain wheel according to the present disclosure includes: a body 10; and a chain wheel 20.

[0034] The body 10 of the present disclosure is arranged in the water. The body 10 includes a support block 11 provided between opposite side plates of one end thereof, a longitudinal first surface and a longitudinal second surface of the support block being inclined, and as one of movable members 30 to be described below is brought into contact with one of the inclined portions of the support block 11, movement of a fairlead chain 110 may be controlled.

[0035] At this point, the support block 11 has an opening (without reference numeral), and when the fairlead chain 110 is inserted into the opening, the fairlead chain 110 may extend from a first end to a second end of the body 10.

[0036] Furthermore, the body 10 includes: slot holes 12 respectively formed on opposite side plates (without reference numerals); operating pieces 13 rotatably arranged at respective openings of the slot holes 12 and configured to open and close the openings of the slot holes 132 in response to rotating directions thereof; and movable means 14 configured to push or pull respective ends of the operating pieces 13 to rotate the operating pieces 13 in any one direction. Accordingly, one end of the rotation shaft 21 of the chain wheel 20 is inserted into the first slot hole 12 and the other end of the rotation shaft 21 of the chain wheel 20 is inserted into the second slot hole 13, and then the operating pieces 13 are rotated in one direction by using the movable means 14 to close the openings of the slot holes 13, thereby fixing the chain wheel 20 to the body 10. With the chain wheel 20 in the fixed state, the operating pieces 13 are rotated in the other direction by using the movable means 14 to open the openings of the slot holes 12 and then the chain wheel 20 is pulled, thereby separating the chain wheel 20 from the body 10.

[0037] At this point, inner surfaces of the slot holes 12 are made of Incornel material, and due to the nature of the material, damages to the inner surfaces of the slot holes 12, for example, abrasion, etc. may be suppressed.

[0038] Furthermore, each of the slot holes 12includes a reinforcing piece (without a reference numeral) that is made of Inconel material and arranged along the inner surface thereof. Accordingly, damages to the inner surfaces of the slot holes 12 can be suppressed by the respective reinforcing pieces .

[0039] Furthermore, the movable means 14 may use any known structures and methods as long as it can allow rotation of the operating pieces 13, and as an example, the movable means 14 may be cylinders in which a rod can protrude and retract in a hydraulic or pneumatic manner.

[0040] Furthermore, the body 10 includes a binding member 15 disposed on one surface thereof, and a mooring chain 140 extending from an anchor 150 in the water is bound using the binding member 15, thereby simply connecting the mooring chain 140 to the body.

[0041] At this point, the binding member 15 may use any known structures and methods as long as it can facilitate the binding of the mooring chain 140, and as an example, the binding member may be an openable and closeable shackle.

[0042] Furthermore, the body 10 includes a link member 16 disposed on one surface thereof, and a rope 160 extending from an outside space is bound to the link member 16, thereby simply connecting the rope 160 to the body.

[0043] At this point, a float 161 may be coupled to one end of the rope 160.

[0044] Therefore, when the rope 160 is pulled using a winch (without reference numeral) disposed at a ship 200 on the water, the body 10, i.e., the submersible mooring pulley A having a detachable chain wheel according to the present disclosure may be towed and the mooring chain 140 connected to the submersible mooring pulley A may be pulled.

[0045] Meanwhile, the fairlead chain 110 connected to the body 10 is a part of the offshore structure mooring system 100 as shown in FIG. 10, and one end thereof may pass through a fairlead chain stopper 130 to be connected to a wire rope 160, and the other end (e.g., lower end) thereof may pass through a lower end of the body 10 to extend outwards to be connected to the wire rope 160.

[0046] Therefore, mooring tension of the offshore structure S may be adjusted by pulling the wire rope 160 connected to one end or the other end of the fairlead chain 110 by using a winch (without reference numeral) of a ship 200 located on the water.

[0047] Furthermore, the body 10 may have an ’L* shape with a middle part curved at a predetermined angle between the first end and the second end of the body. However, the 'L' shape is just an example, and the body may have a 'straight' shape with a middle part linearly extending between the first end and the second end, as shown in FIG. 11.

[0048] The chain wheel 20 of the present disclosure supports a part of the fairlead chain 110 extending from an offshore structure S on the water. The chain wheel 20 rotates forwards and reversely on the rotation shaft 21 penetrating through opposite side plates between the first end and the second end of the body 10, thereby allowing forward and rearward movements of the fairlead chain 110 (longitudinal direction of the fairlead chain) to be stably performed.

[0049] At this point, the chain wheel 20 includes a support member 22 having protruding parts (without reference numeral) formed radially along a circumference of a central portion thereof, and at least one of the protrusions of the support member 22 is caught by the fairlead chain 110 so that it is possible to prevent the fairlead chain 110 from slipping and twisting in the body 10.

[0050] Furthermore, an oilless bushing 21a is mounted to the rotation shaft 21 of the chain wheel 20, and the oilless bushing 21a may facilitate rotation of the rotation shaft 21.

[0051] Furthermore, according to the present disclosure, the submersible mooring pulley A having a detachable chain wheel includes: movable members 30; and a wireless controller 40.

[0052] The movable members 30 of the present disclosure are rotatably provided between the longitudinal first and second ends of the body 10 and arranged at the front and the rear with a gap therebetween. The movable members 30 rotate forwards and reversely within a predetermined angle range according to protrusion and retraction of a rod 31a of a cylinder 31 thus one of both the movable members 30 is brought into contact with one of the inclined portions of the support block 11 to control movement of the fairlead chain 110.

[0053] At this point, the movable members 30 include a link 32 rotatably connected to both the movable members 30 while being located therebetween. As one of both the movable members 30 rotates by protrusion and retraction of the rod 31a of the cylinder 31, the other movable member rotates together, and therefore, when one of the movable members 30 is brought into contact with the support block 11, connection between the other movable member and the support block 11 may be removed.

[0054] Meanwhile, as the degree of protrusion and retraction of the rod 31a of the cylinder 31 is artificially adjusted, both the movable members 30 may be disconnected from the support block 21.

[0055] Therefore, as both the movable members 30 are disconnected from the support block 11, the fairlead chain 110 can be freely moved in the longitudinal direction in the body 10. Accordingly, it is possible to facilitate an initial connecting work of the fairlead chain 110 to the submersible mooring pulley A having a detachable chain wheel according to the present disclosure.

[0056] At this point, the case in which both the movable members 30 are disconnected from the support block 11, as described above, is artificially performed only in special situations such as the initial connection of the fairlead chain 110 to the submersible mooring pulley A having a detachable chain wheel according to the present disclosure, but in general situations, at least one of both the movable members 30 are in contact with the support block 11.

[0057] The wireless controller 40 of the present disclosure is arranged on one surface of the body 10 and controls operation of the movable members 30 according to a remote signal input from an outside space.

[0058] At this point, the wireless controller 40 controls operation of the movable members 30, and controls protrusion or retraction of the rod 31a of the cylinder 31 in response to a remote signal. Therefore, as one of both the movable members 30 is brought into contact with the support block 11 by protrusion or retraction of the rod 31a of the cylinder 31, a forward or rearward movement of the fairlead chain 110 may be controlled.

[0059] Meanwhile, the wireless controller 40 may use any known structures and methods as long as it can control the operation of the movable members 30 in response to a remote signal input from a remote location, for example, from a communication device (not shown in the drawings) of the ship 200 on the water, and detailed description of the wireless controller 40 will be omitted.

[0060] Furthermore, additionally, the submersible mooring pulley A having a detachable chain wheel according to the present disclosure may include a pulling member 50 connected to both the movable members 30.

[0061] Therefore, since the movable members 30 may be rotated by pulling the pulling member 50 in unusual situations of the wireless controller 40, one of both the movable members 30 may be brought into contact with the support block 11.

[0062] At this point, the pulling member 50 may use any known shapes and types as long as it can pull the movable members 30, for example, the pulling member may be a rope.

[0063]

[0064] The submersible mooring pulley A having a detachable chain wheel according to the present disclosure may adjust the mooring tension of the offshore structure S with bi-directional movements of the fairlead chain 110. The above configuration will be described in detail as follows.

[0065] As shown in FIG. 2, lthe fairlead chain 110 extending from the fairlead chain stopper 130 coupled to the offshore structure S on the water is inserted into the body 10 of the present disclosure.

[0066] Furthermore, the mooring chain 140 extending from the anchor 150 in the water and the rope 160 extending from the outside space are connected to the body 10 of the present disclosure.

[0067] At this point, the body 10 includes: the binding member 15 arranged on one surface thereof; and the link member 16 arranged on one surface thereof. As shown in FIG. 8, the mooring chain 140 extending from the anchor 150 in the water is bound using the binding member 15 so that connection between the body and the mooring chain 140 can be simply performed. As shown in FIG. 9, the rope 160 extending from the outside space is bound to the link member 16 so that connection between the body 10 and the rope 160 can be simply performed. Accordingly, when the rope 160 is pulled using a winch (without a reference numeral) arranged on the ship 200 on the water, towing of the body 10, i.e., the submersible mooring pulley A having a detachable chain wheel according to the present disclosure and towing of the mooring chain 140 can be simply performed.

[0068] Furthermore, the chain wheel 20 is arranged between the first end and the second end of the body 10 of the present disclosure, and a part of the fairlead chain 110 inserted into the body 10 is supported by the chain wheel 20.

[0069] At this point, the chain wheel 20 rotates forwards and reversely on the rotation shaft 21 penetrating through the opposite side plates of the body 10, so that the forward and rearward movements (longitudinal movement) of the fairlead chain 110 supported by the chain wheel 20 can be stably performed with rotation of the chain wheel 20.

[0070] At this point, the oilless bushing 21a is mounted to the rotation shaft 21 of the chain wheel 20 as shown in FIG. 3, and the oilless bushing 21a may facilitate rotation of the rotation shaft 21.

[0071] At this point, the chain wheel 20 includes the support member 22 having the protruding parts formed radially along a circumference of a central portion thereof, and at least one of the protruding parts of the support member 22 is caught by the fairlead chain 110 so that it is possible to prevent the fairlead chain 110 from slipping and twisting in the body 10.

[0072] At this point, when the fairlead chain 110 supported by the chain wheel 20 is freely moved in the forward or rearward direction, i.e., the longitudinal direction, the fairlead chain 110 may be separated from the body 10, thereby causing unintentional separation thereof.

[0073] However, the present disclosure includes the movable members 30 arranged at the body 10, and the movable members 30 are brought into contact with the support block 11 provided at the body 10 to partially block the opening formed in the support block 11, so that movement of the fairlead chain 110 passing through the opening may be controlled and thus unintentional separation of the fairlead chain 110 can be prevented.

[0074] However, when movement control of the fairlead chain 110 by the movable members 30 is limited in one direction, e.g., in a direction from the water toward the surface of the water, there may be difficulty in controlling the mooring tension of the offshore structure S.

[0075] However, according to the present disclosure, the pair of movable members 30 is provided at the body 10 and arranged at the front and the rear with a gap therebetween. One of the movable members 30 is brought into contact with one inclined portion of the support block 11, so that movement of the fairlead chain 110 may be controlled in one direction thereof, e.g., a direction from the water toward the surface of the water, as shown in FIG. 6. In addition, the other of the movable members 30 is brought into contact with the other inclined portion of the support block 11, so that movement of the fairlead chain 110 may be controlled in another direction, e.g., in a direction from the surface of the water toward the water, as shown in FIG. 7. Eventually, the movable members 30 may allow bidirectional movement control of the fairlead chain 110, so that it is possible to facilitate adjustment of mooring tension of the offshore structure S in normal times. Furthermore, as one end of the fairlead chain 110 is pulled at the side where the fairlead chain 110 extends longer outwards from the body 10, it is possible to quickly perform withdrawal of the fairlead chain 110 from the body 10, in other words, simply perform disconnection of the fairlead chain 110 so that relocation of the offshore structure S in emergency situations such as typhoons can be quickly performed.

[0076] At this point, there may be difficulty in controlling the operation of the movable members 30.

[0077] However, the present disclosure includes the wireless controller 40 that controls the operation of the movable members 30 in response to a remote signal input from the outside space, so that the operation of the movable members 30 is controlled by the wireless controller 40 thereby reducing difficulty of controlling the operation of the movable members 30.

[0078] Furthermore, the wireless controller 40 controls operation of the movable members 30, and the wireless controller 40 controls the protrusion and retraction of the rod 31a of the cylinder 31 in response to the remote signal, and the movable members 30 connected to each other via the link 32 is rotated forwards and reversely with protrusion and retraction of the rod 31a of the cylinder 31. Accordingly, one of both the movable members 30 may be brought into simple contact with the support block 11 to reduce the difficulty of controlling the operation of the movable members 30.

[0079] At this point, bi-directional movement control of the fairlead chain 110 may be performed in unusual situations of the wireless controller 40.

[0080] In other words, the present disclosure may include the pulling member 50 connected to both the movable members 30, so that in unusual situations of the wireless controller 40, the movable members 30 connected to each other via the link 32 may be rotated by pulling the pulling member 50. Therefore, one of both the movable members 30 may be brought into contact with the support block 11 thereby controlling bi-directional movements of the fairlead chain 110.

[0081] Meanwhile, the chain wheel 20 of the submersible mooring pulley A having a detachable chain wheel according to the present disclosure may be separated from the body 10.

[0082] In other words, the body 10 of the present disclosure includes: the slot holes 12 respectively formed on the opposite side plates thereof; the operating pieces 13 rotatably arranged at the openings of the slot holes 12 and configured to close and open the openings of the slot holes 12 in response to a rotation direction thereof; and the movable means 14 rotating the operating pieces 13 by pushing and pulling respective ends of the operating pieces 13. As shown in FIG. 4, one end of the rotation shaft 21 of the chain wheel 20 is inserted into the first slot hole 12 and the other end of the rotation shaft 21 of the chain wheel 20 is inserted into the second slot hole 12. Thereafter, the operating pieces 13 are rotated in one direction by using the movable means 14 to close the openings of the slot holes 12, so that the chain wheel 20 can be fixed to the body 10. Moreover, as shown in FIG. 5, with the chain wheel 20 in the fixed state, the operating pieces 13 are rotated in the other direction by using the movable means 14 to open the openings of the slot holes 12, and then the chain wheel 20 is pulled thereby separating the chain wheel 20 from the body 10. Accordingly, not only is it facilitate maintenance of the chain wheel 20 and but also costs required for provision of the chain wheel 20 are reduced by selectively applying one chain wheel 20 to a plurality of submersible mooring pulleys so as to reduce operation costs of the offshore structure mooring system 100.

[0083]

[0084] The present disclosure described above is not limited to the above-mentioned embodiment and those skilled in the art will appreciate that various modifications, additions, and substitutions are possible, without departing from the scope and spirit of the present disclosure as disclosed in the accompanying claims, and the modifications, additions, and substitutions are within the scope of the protection of the patent right of the present disclosure that 5 is defined by description of the claims.

[0085]

[0086] [Description of Reference numerals]

[0087] 10: body 11: support block

[0088] 12: slot hole 13: operating piece 10

[0089] 14: movable mean 15: binding member

[0090] 16: link member 20: chain wheel

[0091] 21: rotation shaft 21a: oilless bushing

[0092] 22: support member 30: movable member

[0093] 31: cylinder 31a: rod 15

[0094] 32: link 40: wireless controller

[0095] 50: pulling member 100: mooring system

[0096] 110 : fairlead chain 120: wire rope

[0097] 130 : fairlead chain stopper 140 : the mooring chain 20

[0098] 150 : anchor 160: rope

[0099] 161 : float 200: ship

[00100] A: submersible mooring pulley S: offshore structure 25 Industrial Applicability

[00101] The present disclosure is configured to allow stable connection of the mooring chain extending from the anchor in the water and bi-directional movement control of the fairlead chain extending from the offshore structure, 5 thereby facilitating adjustment of mooring tension of the offshore structure in normal times and disconnection of the fairlead chain in emergency situations, and the present disclosure is configured to separate the chain wheel in contact with the fairlead chain, thereby facilitating 10 maintenance of the chain wheel and reducing operation costs of the offshore structure mooring system by selectively applying one chain wheel to a plurality of submersible mooring pulleys. Therefore, the present disclosure has the industrial applicability in relation to manufacturing the submersible 15 mooring pulley.

Claims

06 01 261. A submersible mooring pulley having a detachable chain wheel, the submersible mooring pulley comprising:5 a fairlead chain;a body arranged in the water, and comprising a support block between opposite side plates of one end part thereof, a longitudinal first surface and a longitudinal second surface of the support block being inclined; and10 a chain wheel configured to rotate forwards and reverselyon a rotation shaft penetrating through opposite side plates between a first end and a second end of the body, and supporting a part of the fairlead chain extending from an offshore structure on the water,15 wherein the body comprises: slot holes respectivelyformed on opposite side plates; operating pieces rotatably arranged at respective openings of the slot holes and configured to open and close the openings of the slot holes in response to rotation directions thereof; and movable means20 configured to push and pull ends of the operating pieces to rotate the operating pieces in one direction, andthe chain wheel has one end and the other end of the rotation shaft that are inserted into one and the other of the slot holes, and the chain wheel is fixed to the body as25 the openings of the slot holes are closed by rotation in one06 01 26direction of the operating pieces, and the chain wheel is separated from the body as the chain wheel is removed via the openings of the slot holes that are opened by rotation in the other direction of the operating pieces.

52. The submersible mooring pulley of claim 1, wherein an inner surface of each of the slot holes of the body is made of Inconel material.10 3. The submersible mooring pulley of claim 1, whereineach of the slot holes of the body includes a reinforcing piece that is made of Inconel material and arranged along an inner surface of each of the slot holes.15 4. The submersible mooring pulley of claim 1, whereinthe movable means of the body are cylinders each having a rod that protrudes and retracts in a hydraulic or pneumatic manner.20 5. The submersible mooring pulley of claim 1, whereinthe body comprises: a binding member configured to bind a mooring chain extending from an anchor in the water; and a link member providing a binding portion of a rope extending from an outside space.

256. The submersible mooring pulley of claim 1, wherein the chain wheel comprises a support member having protruding parts formed radially along a circumference of a central portion thereof.

7. The submersible mooring pulley of claim 1, wherein the chain wheel comprises an oilless bushing mounted to the rotation shaft.06 01 2610 8. The submersible mooring pulley of claim 1, furthercomprising:a pair of movable members rotatably arranged between longitudinal first and second ends of the body, and arranged at a front portion and a rear portion of the body with a gap15 therebetween, wherein when the movable members rotate forwards and reversely within a predetermined angle range by means of protrusion and retraction of a rod of a cylinder, one or both of the movable members are brought into contact with respective ones of the inclined surfaces of the support block20 to control longitudinal movement of the fairlead chain; and a wireless controller arranged on one surface of the body and configured to control operation of the pair of movable members in response to a remote signal input from an outside space.06 01 269. The submersible mooring pulley of claim 8, wherein the pair of movable members comprises a link rotatably connected to both the movable members while being located therebetween.

510. The submersible mooring pulley of claim 9, wherein the wireless controller controls operation of the pair of movable members, and configured to control protrusion and retraction of the rod of the cylinder in response to the 10 remote signal.

11. The submersible mooring pulley of claim 8, further comprising:a pulling member connected to both the pair of movable 15 members.

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