Fairlead chain stopper having detachable chain wheel

Abstract

The present invention relates to a fairlead chain stopper having a detachable chain wheel, whereby the movement of the fairlead chain extending into the water from an offshore structure is regulated i

Description

Invention Title: FAIRLEAD CHAIN STOPPER HAVING DETACHABLE CHAIN WHEEL Technical Field

[0001] The present disclosure relates to a fairlead chain stopper applied to an offshore structure mooring system. More particularly, the present disclosure relates to a fairlead chain stopper having a detachable chain wheel, the fairlead chain stopper being capable of performing bidirectional movement control of a fairlead chain extending from an offshore structure to the water to facilitate adjustment of mooring tension of the offshore structure in normal times and to facilitate disconnection of the fairlead chain in emergency situations, and which is capable of allowing separation of a chain wheel in contact with the fairlead chain to facilitate maintenance of the chain wheel and to reduce offshore structure mooring system operation costs by selectively applying one chain wheel to a plurality of fairlead chain stoppers. 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 disassembling 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 to which a stopper is applied, 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 fairlead chain stopper, which is configured to perform bi-directional movement control of the fairlead chain extending from the offshore structure to the water so as to facilitate adjustment of mooring tension of the offshore structure in normal times and so as to facilitate disconnection of the fairlead chain in emergency situations, and the present disclosure is capable of allowing separation of the chain wheel in contact with the fairlead chain so as to facilitate maintenance of the chain wheel and to reduce offshore structure mooring system operation costs with selectively applying one chain wheel to a plurality of fairlead chain stoppers . Technical Solution

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

[0015] a body provided at an offshore structure and configured to support a part of a fairlead chain through a chain wheel rotating forwards and reversely on a rotation shaft; and an arm connected to the body to be extend in an oblique direction and configured to support another part of the fairlead chain extending from the body, and including a pair of support blocks provided between opposite side surfaces thereof and each having inclination on one surface thereof and arranged at the front and the rear with a gap therebetween, 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 rotating directions thereof; and movable means configured to push or pull ends of the operating pieces to rotate the operating pieces in one direction, and the chain wheel may have the rotation shaft of which one end and the other end 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 fairlead chain stopper 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 with selectively applying one chain wheel to a plurality of fairlead chain stoppers, thereby reducing offshore structure mooring system operation costs .

[0017] Furthermore, according to the present disclosure, the fairlead chain stopper having a detachable chain wheel includes: the pair of movable members provided at the arm and arranged at the front and the rear with a gap therebetween; and the wireless controller controlling operation of the movable members in response to a remote signal. With operation of the movable members performed by control of the wireless controller, bi-directional movement control of the fairlead chain, more specifically, control of a forward or rearward movement thereof can be performed. Therefore, not only is it possible to facilitate adjustment of mooring tension of the offshore structure in normal time to allow a moored state of the offshore structure to be stably maintained, but in emergency situations, emergency disconnection of the fairlead chain can be simply performed to facilitate relocation of the offshore structure.

[0018] Furthermore, according to the present disclosure, the fairlead chain stopper 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 abnormal situations of the wireless controller. Description of Drawings

[0019] FIG. 1 is a perspective view showing an appearance of a fairlead chain stopper having a detachable chain wheel according to the present disclosure.

[0020] FIG. 2 is a view of an example showing the fairlead chain stopper having a detachable chain wheel according to the present disclosure mounted to an offshore structure.

[0021] FIG. 3 is a sectional view in one direction showing a coupling part between a body and a chain wheel of the fairlead chain stopper having a detachable chain wheel according to the present disclosure.

[0022] FIG. 4 is a view of an example showing coupling of the chain wheel to the body in the fairlead chain stopper having a detachable chain wheel according to the present disclosure .

[0023] FIG. 5 is a view of an example showing separation of the chain wheel from the body in the fairlead chain stopper having a detachable chain wheel according to the present disclosure .

[0024] FIG. 6 is a view of an example showing movement in one direction of a fairlead chain in the fairlead chain stopper having a detachable chain wheel according to the present disclosure.

[0025] FIG. 7 is a view of an example showing movement in another direction of the fairlead chain in the fairlead chain stopper having a detachable chain wheel according to the present disclosure.

[0026] FIG. 8 is a view of an example showing rotation of the body in the fairlead chain stopper having a detachable chain wheel according to the present disclosure.

[0027] FIG. 9 is a view of an example showing rotation of an arm in the fairlead chain stopper having a detachable chain wheel according to the present disclosure.

[0028] FIG. 10 is a view of an example showing mooring the offshore structure by using an offshore structure mooring system equipped with the fairlead chain stopper having a detachable chain wheel according to the present disclosure. Best Mode

[0029] Hereinbelow, the present disclosure will be described in detail with reference to accompanying drawings.

[0030]

[0031] As shown in FIG. 1, a fairlead chain stopper A having a detachable chain wheel according to the present disclosure includes: a body 10; and an arm 20.

[0032] The body 10 of the present disclosure is installed at an offshore structure S, more specifically at a bollard (without a reference numeral) constituting the offshore structure S to support a part of a fairlead chain 110.

[0033] At this point, the body 10 includes a chain wheel 11 rotating forwards and reversely on a rotation shaft 11c in response to a movement direction of the fairlead chain 110, and the chain wheel 11 may allow forward and rearward movements of the fairlead chain 110 (longitudinal direction of the fairlead chain) to be stably performed.

[0034] At this point, an oilless bushing lid is mounted to the rotation shaft 11c of the chain wheel 11 as shown in FIG. 3, and the oilless bushing lid may facilitate rotation of the rotation shaft 11c.

[0035] Furthermore, the chain wheel 11 includes a support member lib that is arranged between circular support plates 11a, which face each other with a gap between the left and right circular support plates and has protruding parts (without reference numerals) radially formed along the circumference of a center portion thereof. Accordingly, at least one of the protruding parts is caught by the fairlead chain 110 so as to prevent the fairlead chain 110 from slipping and twisting in the body 10.

[0036] Furthermore, the body 10 includes: slot holes 13 respectively formed on opposite side plates (without reference numerals); operating pieces 14 rotatably arranged at respective openings of the slot holes 13 and configured to open and close the openings of the slot holes 13 in response to rotating directions thereof; and movable means 15 configured to push or pull respective ends of the operating pieces 14 to rotate the operating pieces 14 in any one direction. Accordingly, one end of the rotation shaft 11c of the chain wheel 11 is inserted into the first slot hole 13 and the other end of the rotation shaft 11c of the chain wheel 11 is inserted into the second slot hole 13, and then the operating pieces 14 are rotated in one direction by using the movable means 15 to close the openings of the slot holes 13, thereby fixing the chain wheel 11 to the body 10. With the chain wheel 11 in the fixed state, the operating pieces 14 are rotated in the other direction by using the movable means 15 to open the openings of the slot holes 13 and then the chain wheel 11 is pulled, thereby separating the chain wheel 11 from the body 10.

[0037] At this point, inner surfaces of the slot holes 13 are made of Inconel material, and due to the nature of the material, damages to the inner surfaces of the slot holes 13, for example, abrasion, etc. may be suppressed.

[0038] Furthermore, each of the slot holes 13 includes 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 13 can be suppressed by the respective reinforcing pieces .

[0039] Furthermore, the movable means 15 may use any known structures and methods as long as it can allow rotation of the operating pieces 14, and as an example, the movable means 15 may be cylinders in which a rod can protrude and retract in a hydraulic or pneumatic manner.

[0040] Meanwhile, as shown in FIG. 8, the body 10 is coupled to the offshore structure S by a hinged manner and is rotated forwards and reversely within a predetermined angle range on a shaft 12 extending vertically, thereby corresponding to leftward and rightward movements of the fairlead chain 110. In other words, the body 10 may move leftwards and rightwards together with the fairlead chain 110 so that the body 10 may allow the fairlead chain 110 to be stably supported.

[0041] Furthermore, as shown in FIG. 10, as a part of an offshore structure mooring system 100, one end (e.g., upper end) of the fairlead chain 110 connected to the body 10 may pass through an upper end of the body 10 to extend outwards to be connected to a wire rope 120, and the other end (e.g., lower end) thereof may pass through the arm 20 to extend to a submersible mooring pulley 130 in the water, more specifically to the submersible mooring pulley 130 that is connected to an anchor 150 located in the water via a mooring chain 140, and then may be connected to the wire rope 120.

[0042] Therefore, mooring tension of the offshore structure S may be adjusted by pulling the wire rope 120 connected to one end or the other end of the fairlead chain 110 with a winch (without reference numeral) of a ship 200 located on the water.

[0043] The arm 20 of the present disclosure is connected to the body 10 while extending from the body in an oblique direction and supports the other part of the fairlead chain 110 extending from the body 10.

[0044] At this point, the arm 20 includes a pair of support blocks 21 that are provided between opposite side surfaces thereof and arranged at the front and the rear with a gap therebetween, the pair of support blocks 21 each having one inclined surface. When one of movable members 30 is brought into contact with one inclined part of one of the support blocks 21, movement control of the fairlead chain 110 may be performed.

[0045] At this point, the pair of support blocks 21 includes an opening (without reference numeral), thereby allowing the fairlead chain 110 to extend from one end of the arm 20 close to the body 10 toward the other end thereof as the fairlead chain 110 is inserted into the opening.

[0046] Meanwhile, the arm 20 is coupled to the body 10 in a hinged manner as shown in FIG. 9, and is rotated forwards and reversely within a predetermined angler range on a shaft 22 extending horizontally, thereby corresponding to upward and downward movements of the fairlead chain 110. In other words, the arm 20 may move upwards and downwards together with the fairlead chain 110 so that the arm 20 may allow the fairlead chain 110 to be stably supported.

[0047] In addition, the fairlead chain stopper A having a detachable chain wheel according to the present disclosure may include the movable members 30; and a wireless controller 40.

[0048] The movable members 30 of the present disclosure are rotatably provided at the arm 20 and arranged at the front and the rear with a gap therebetween. As the movable members 30 are rotated forwards and reversely within the predetermined angle range with protrusion and retraction of a rod 31a of a cylinder 31, one of both the movable members is brought into contact with the inclined portion of one of the support blocks 21 to control movement of the fairlead chain 110.

[0049] 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 is rotated with protrusion and retraction of the rod 31a of the cylinder 31, the other movable member is rotated together. Therefore, when one of the movable members 30 is brought into contact with one of the support blocks 21, connection between the other movable member and the other support block 21 may be removed.

[0050] 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 blocks 21.

[0051] Therefore, as both the movable members 30 are disconnected from the support blocks 21, the fairlead chain 110 may be freely moved in a longitudinal direction in the body 10 and the arm 20. Accordingly, it is possible to facilitate an initial connecting work of the fairlead chain 110 to the fairlead chain stopper A having a detachable chain wheel according to the present disclosure.

[0052] At this point, the case in which both the movable members 30 are disconnected from the support blocks 21, as described above, is artificially performed only in special situations such as the initial connection of the fairlead chain 110 to the fairlead chain stopper 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 at least one of the support blocks 21.

[0053] The wireless controller 40 of the present disclosure is arranged at one of the body and arm 10 and 20 to control operation of the movable members 30 in response to a remote signal input from the outside space.

[0054] 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 one of the support blocks 21 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.

[0055] 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 of the ship 200 on the water, and detailed description of the wireless controller 40 will be omitted.

[0056] Furthermore, additionally, the fairlead chain stopper A having a detachable chain wheel according to the present disclosure may include a pulling member (without reference numeral) connected to the movable members 30.

[0057] Therefore, since the movable members 30 may be rotated by pulling the pulling member in abnormal situations of the wireless controller 40, one of both the movable members 30 may be brought into contact with one of the support blocks 21.

[0058] At this point, the pulling member 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.

[0059]

[0060] The fairlead chain stopper A having a detachable chain wheel according to the present disclosure may adjust the mooring tension of the offshore structure S with bidirectional movements of the fairlead chain 110. The above configuration will be described in detail as follows.

[0061] As shown in FIG. 2, the body 10 of the present disclosure is installed at the offshore structure S exposed on the water, and as the fairlead chain 110 is inserted into the body 10, a part of the fairlead chain 110 is supported by the body 10 and exposed above the water.

[0062] At this point, the body 10 includes the chain wheel 11 rotating forwards and reversely in response to a moving direction of the fairlead chain 110, and the chain wheel 11 includes the support member lib arranged between the circular support plates 11a, which are arranged on left and right portions with a gap therebetween and face each other, and having the protruding parts formed radially along the circumference of the central portion. The chain wheel 11 may allow the fairlead chain 110 to be stably moved forwards or rearwards, and particularly as at least one protruding part of the support member lib is caught by the fairlead chain 110, it is possible to prevent the fairlead chain 110 from slipping and twisting at the body 10.

[0063] Furthermore, the arm 20 is connected to the body 10, and the fairlead chain 110 extending from the body 10 is inserted into the arm 20 thus a part of the fairlead chain 110 extending into the water may be supported by the arm 20.

[0064] At this point, when the fairlead chain 110 supported by the body 10 and the arm 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 and the arm 20, thereby causing unintentional separation thereof.

[0065] However, the present disclosure may include the movable members 30 arranged at the arm 20, and the movable members 30 are brought into contact with the support blocks 21 provided at the arm 20 to partially block the openings formed in the support blocks 21, so that movement of the fairlead chain 110 passing through the openings may be controlled and thus unintentional separation of the fairlead chain 110 can be prevented.

[0066] However, when movement control of the fairlead chain 110 by the movable members 30 is limited to one direction, e.g., in a direction from the arm 20 to the body 10, there may be difficulty in controlling mooring tension of the offshore structure S. present disclosure is provided at the arm 20 and arranged at the front and the rear with a gap therebetween, and the pair of support blocks 21 of the arm 20 is also provided and is arranged at the front and the rear with a gap therebetween. As one of the movable members 30 is brought into contact with one of the support blocks 21, as shown in FIG. 6, movement of the fairlead chain 110 in one direction, e.g., a direction from the arm 20 to the body 10 may be controlled, and furthermore, as the other of the movable members 30 is brought into contact with the other of the support blocks 21, as shown in FIG. 7, movement of the fairlead chain 110 in the other direction, e.g., in a direction from the body 10 to the arm 20 may be controlled. As a result, the movable members 30 may allow control of bi-directional movements of the fairlead chain 110 to be performed so that adjustment of mooring tension of the offshore structure S in normal times can be efficiently performed, and furthermore, as the fairlead chain 110 may be rapidly withdrawn from the body 10 and the arm 20 by pulling one end of the fairlead chain 110 at one side where the fairlead chain extends outwards from the body 10 and the arm 20 longer than another side, i.e., disconnection of the fairlead chain 110 can be simply performed. Accordingly, the offshore structure S can be rapidly relocated in emergency situations such as typhoons.

[0068] At this point, there may be difficulty in controlling the operation of the movable members 30.

[0069] However, the present disclosure may include the wireless controller 40 that controls the operation of the movable members 30 in response to a remote signal input from the outside, 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.

[0070] In other words, 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 a 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 one of the support blocks 21 to reduce the difficulty of controlling the operation of the movable members 30.

[0071] At this point, bi-directional movement control of the fairlead chain 110 may be performed in abnormal situations of the wireless controller 40.

[0072] In other words, the present disclosure may include the pulling member connected to both the movable members 30, so that in abnormal 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. Therefore, one of both the movable members 30 may be brought into contact with one of the support blocks 21 thereby controlling bidirectional movements of the fairlead chain 110.

[0073] Meanwhile, the chain wheel 11 of the fairlead chain stopper A having a detachable chain wheel according to the present disclosure may be separated from the body 10.

[0074] In other words, the body 10 of the present disclosure includes: the slot holes 13 respectively formed on the opposite side plates thereof; the operating pieces 14 rotatably arranged at the openings of the slot holes 13 and configured to close and open the openings of the slot holes 13 in response to a rotation direction thereof; and the movable means 15 rotating the operating pieces 14 by pushing and pulling respective ends of the operating pieces 14. As shown in FIG. 4, one end of the rotation shaft 11c of the chain wheel 11 is inserted into the first slot hole 13 and the other end of the rotation shaft 11c of the chain wheel 11 is inserted into the second slot hole 13. Thereafter, the operating pieces 14 are rotated in one direction by using the movable means 15 to close the openings of the slot holes 13, so that the chain wheel 11 can be fixed to the body 10. Moreover, as shown in FIG. 5, with the chain wheel 11 in the fixed state, the operating pieces 14 are rotated in the other direction by using the movable means 15 to open the openings of the slot holes 13, and then the chain wheel 11 is pulled thereby separating the chain wheel 11 from the body 10. Accordingly, not only is it facilitate maintenance of the chain wheel 11 and but also costs required to provision of the chain wheel 11 is reduced with selectively applying one chain wheel 11 to a plurality of fairlead chain stoppers so as to reduce offshore structure mooring system operation costs .

[0075]

[0076] 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 is defined by description of the claims.

[0077]

[0078] [Description of Reference numerals]

[0079] 10: body 11: chain wheel

[0080] 11a: circular support plate lib: support member

[0081] 11c: rotation shaft lid : oilless bushing

[0082] 12: shaft 13: slot hole

[0083] 14: operating pieces 15: movable means

[0084] 20: arm 21: support block

[0085] 22: shaft 30: movable member

[0086] 31: cylinder 31a: rod

[0087] 32: link 40: wireless controller

[0088] 100 : mooring system 110: fairlead chain

[0089] 120 : wire rope 130: submersible mooring pulley

[0090] 140 : mooring chain 150: anchor

[0091]

[0092] 200 S: : ship A: fairlead chain stopper offshore structure Industrial Applicability

[0093] The present disclosure is configured to perform bi-directional movement control of the fairlead chain extending from the offshore structure to the water so as to facilitate adjustment of mooring tension of the offshore structure in normal times and so as to facilitate disconnection of the fairlead chain in emergency situations, and the present disclosure is capable of allowing separation of the chain wheel in contact with the fairlead chain so as to facilitate maintenance of the chain wheel and to reduce offshore structure mooring system operation costs with selectively applying one chain wheel to a plurality of fairlead chain stoppers. Therefore, the present disclosure has the industrial applicability in relation to manufacturing the fairlead chain stopper.

Claims

07 01 261. A fairlead chain stopper having a detachable chain wheel, the fairlead chain stopper comprising:5 a body configured to couple to an offshore structure,the body configured to support a part of a fairlead chain through a chain wheel rotating forwards and reversely on a rotation shaft; andan arm connected to the body to be extend in an oblique 10 direction and configured to support another part of the fairlead chain extending from the body, and comprising a pair of support blocks provided between opposite side surfaces thereof and each having inclination on one surface thereof and arranged at a front portion and a rear portion of the arm 15 with a gap therebetween,wherein the body comprises: 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 20 in response to rotating directions thereof; and movable means configured to push or pull ends of the operating pieces to rotate the operating pieces in one direction, andthe chain wheel has the rotation shaft of which one end and the other end are inserted into one and the other of the 25 slot holes, and the chain wheel is fixed to the body as the openings of the slot holes are closed by rotation in one07 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. An offshore structure and the fairlead chain stopper of claim 1, wherein the body is coupled to the offshore structure in a hinged manner and is configured to rotate forwards and reversely within a predetermined angle range on 10 a shaft extending vertically.

3. The fairlead chain stopper of claim 1, wherein the chain wheel comprises a support member arranged between circular support plates facing each other and arranged at the 15 left and the right with a gap therebetween, the support member having protruding parts formed radially along a circumference of a central portion thereof.

4. The fairlead chain stopper of claim 3, wherein the 20 chain wheel further comprises an oilless bushing mounted to the rotation shaft.

5. The fairlead chain stopper of claim 1, wherein an inner surface of each of the slot holes of the body is made 25 of Inconel material.07 01 266. The fairlead chain stopper of claim 1, wherein each 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.

57. The fairlead chain stopper of claim 1, wherein the movable means of the body are cylinders each having a rod that protrudes and retracts in a hydraulic or pneumatic manner.10 8. The fairlead chain stopper of claim 1, wherein thearm is coupled to the body in a hinged manner and configured to rotate forwards and reversely within a predetermined angle range on a shaft extending horizontally.15 9. The fairlead chain stopper of claim 1, furthercomprising:a pair of movable members rotatably provided at the arm and arranged at the front portion and the rear portion of the arm with a gap therebetween, wherein as the movable members20 rotate forwards or reversely within a predetermined angle range according to protrusion and retraction of a rod of a cylinder, one of the movable members is bought into contact with the inclination surface of one of the support blocks to control longitudinal movement of the fairlead chain; and25 a wireless controller arranged on one of the body andarm and configured to control the operation of the pair of07 01 26movable members according to a remote signal input from the outside.

10. The fairlead chain stopper of claim 9, wherein the 5 pair of movable members comprise a link rotatably connected to both the movable members while being located therebetween.

11. The fairlead chain stopper of claim 9, wherein the wireless controller controls operation of the pair of movable 10 members, and configured to control protrusion and retraction of the rod of the cylinder according to the remote signal.

12. The fairlead chain stopper of claim 9, further comprising:15 a pulling member connected to both the pair of movablemembers .

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