Detachable mooring system for offshore structure and offshore structure mooring method using same

Abstract

The present invention relates to a detachable mooring system for an offshore structure and an offshore structure mooring method using same, with which the mooring state of an offshore structure can be maintained so as to be more stable than previously due to the use of a dual system of chain tension control in which the control of the advancement of chains is carried out at each of first, second, and third tension control devices, and thus not only is the chain connected from the first tension control device pulled so as to increase the tension of the chain when an offshore structure is moored, but also the chains connected from the second and third tension control devices are pulled so as to increase the tension of the chains when an offshore structure is moored.

Description

Detachable mooring system for marine structures and method for mooring marine structures using the same

[0001] The present invention relates to a detachable mooring system for a marine structure and a method for mooring a marine structure using the same, and more particularly, to a detachable mooring system for a marine structure and a method for mooring a marine structure using the same, which enables stable mooring of a marine structure, enables rapid and safe withdrawal of a moored marine structure in an emergency situation, and in particular, reduces manufacturing costs by simplifying the structure, shortens the time required for mooring a marine structure, and facilitates maintenance during operation.

[0002] Marine structures, such as offshore wind turbines, are inevitably affected by waves and currents as they are located at sea.

[0003] Therefore, since the movement of marine structures is influenced by waves and currents, if the movement is excessive, they can be washed away or damaged by falling over.

[0004] Accordingly, various mooring systems, such as those disclosed in Korean Patent Publication No. 10-2014-0126022, are used to secure marine structures to a point at sea.

[0005] However, the size and load of major components such as fairlead chain stoppers and submersible mooring pulleys in conventional mooring systems for marine structures were considerable, making it difficult to manufacture each component and requiring considerable time, manpower, and equipment for installation, which resulted in lower installation efficiency.

[0006] In addition, the mooring system for existing marine structures had a complex structure, including, for example, a large number of links. Therefore, when the withdrawal of the marine structure was required due to an emergency situation such as a port relocation request for emergency maintenance or a typhoon occurrence, it was inevitable that a considerable amount of time, manpower, and equipment would be required to release the connection of each of the multiple links to release the connection with the marine structure. As a result, the withdrawal could not be carried out quickly, which resulted in damage due to delayed maintenance and, if not avoided, serious damage to the marine structure due to the influence of a typhoon.

[0007] In addition, the mooring system for conventional marine structures has two tension control devices applied to one mooring line extending from the anchor on the seabed connected to each bollard of the marine structure. For example, in order to moor a marine structure with a triangular plane moored by three mooring lines, a total of six tension control devices were inevitably required. Therefore, a considerable amount of cost was required to prepare the tension control devices, a considerable amount of time was required to install the tension control devices, and there was a problem that a considerable amount of cost and time was required for maintenance after installation.

[0008] For the above reasons, the field is attempting to develop a detachable mooring system for marine structures that can reduce manufacturing costs, shorten the time required for mooring marine structures, and facilitate maintenance during operation. However, satisfactory results have not been achieved to date.

[0009]

[0010] [Prior Art Literature]

[0011] [Patent Document]

[0012] (Patent Document 1) Republic of Korea Patent Publication No. 10-2014-0126022

[0013] The present invention has been proposed to solve the problems of the prior art as described above, and the purpose is to provide a detachable mooring system for a marine structure and a method for mooring a marine structure using the same, which not only enables stable mooring of a marine structure, but also enables rapid and safe withdrawal of a moored marine structure in an emergency situation, and in particular, reduces manufacturing costs by simplifying the structure, shortens the time required for mooring a marine structure, and facilitates maintenance during operation.

[0014] In order to achieve the above purpose, the present invention,

[0015] A plurality of mooring lines, each comprising an anchor located at one point, another point, and yet another point on the seabed, and a chain extending from the anchor; a first tension control device arranged on one of a plurality of bollards provided in three directions of a marine structure and connected to the chain of one of the mooring lines, wherein the movement of the chain extending between the inlet and the outlet of the body is controlled through the movement of a blocking member provided on the body; a second tension control device arranged on another of the plurality of bollards and connected to the chain of another of the mooring lines, wherein the movement of the chain extending between the inlet and the outlet of the body is controlled through the movement of a blocking member provided on the body; And a third tension control device is arranged on another one of the plurality of above-mentioned bollards and connected to the chain of another one of the above-mentioned mooring lines, and controls the progress of the chain extending between the inlet and the outlet of the body through the behavior of a blocking member provided on the body; A detachable mooring system for a marine structure is proposed.

[0016] In addition, in order to achieve the above purpose, the present invention,

[0017] A mooring line installation step of installing a first mooring line composed of an anchor and a chain, a second mooring line composed of an anchor and a chain, wherein a second tension control device is connected to the chain; and a third mooring line composed of an anchor and a chain, wherein a third tension control device is connected to the chain, at a mooring point; a first tension control device installation step of connecting and installing a first tension control device to one of a plurality of bollards provided in three directions of a marine structure moored to the shore; a marine structure towing step of towing the marine structure to which the first tension control device is connected to the marine structure to the mooring point; And a mooring line connecting step of connecting the first, second, and third mooring lines in three directions of the marine structure towed to the mooring point, respectively, connecting the chain of the first mooring line to the first tension control device, connecting the second tension control device of the second mooring line to another one of the plurality of bollards, and connecting the third tension control device of the third mooring line to another one of the plurality of bollards; A method for mooring a marine structure using a detachable mooring system for marine structures is proposed.

[0018] The mooring system for a marine structure according to the present invention comprises a plurality of mooring lines and a first tension control device, a second tension control device and a third tension control device each connected to one, another and another of the mooring lines, and the overall structure is simplified, so that the total number of tension control devices can be reduced compared to before, and thus the cost for preparing tension control devices can be reduced, the time for installing tension control devices can be shortened, and maintenance after installation can be easily performed.

[0019] The detachable mooring system for marine structures according to the present invention can control the progress of the chain in each of the first, second, and third tension control devices, so that by pulling the chain extending from the first tension control device, the tension of the chain can be increased compared to before in the mooring state of the marine structure, and also by pulling the chain extending from the second and third tension control devices, the tension of the chain can be increased compared to before in the mooring state of the marine structure, so that the mooring state of the marine structure can be maintained more stably by the dual method of chain tension control.

[0020] The detachable mooring system for marine structures according to the present invention can be provided with guide rollers in the first, second, and third tension control devices, so that not only can the sagging of the chain be prevented between the inlet and outlet of the body by the guide rollers, but also the chain can slide smoothly, so that the chain can be prevented from twisting, and thus the tension control by chain pulling can be made smoother.

[0021] Figure 1 is an exemplary diagram showing mooring of a marine structure using a detachable mooring system for a marine structure according to the present invention.

[0022] Figure 2 is an exemplary drawing showing a form in which a first tension control device is connected to a detachable mooring system for a marine structure according to the present invention.

[0023] Figure 3 is an exemplary diagram showing a form in which the second and third tension control devices are connected to a detachable mooring system for a marine structure according to the present invention.

[0024] Figure 4 is an exemplary diagram showing the progress control of a chain through a first tension control device in a detachable mooring system for a marine structure according to the present invention.

[0025] Figure 5 is an exemplary diagram showing the progress control of a connecting chain through the second and third tension control devices in a detachable mooring system for a marine structure according to the present invention.

[0026] Figure 6 is an exemplary drawing showing a form in which guide rollers are applied to the first, second, and third tension control devices of a detachable mooring system for a marine structure according to the present invention.

[0027] Figure 7 is a cross-sectional view of a guide roller applied to the first, second, and third tension control devices of a detachable mooring system for a marine structure according to the present invention.

[0028] Figure 8 is an exemplary diagram showing tension control through the first tension control device of the detachable mooring system for marine structures according to the present invention.

[0029] Figure 9 is an exemplary diagram showing tension control through the second and third tension control devices of the detachable mooring system for marine structures according to the present invention.

[0030] Figure 10 is a process diagram of a method for mooring a marine structure using a detachable mooring system for a marine structure according to the present invention.

[0031] Hereinafter, the present invention will be described in detail based on the attached drawings.

[0032]

[0033] As illustrated in Fig. 1, the detachable mooring system (A) for a marine structure according to the present invention includes a mooring line (100); a first tension control device (200); a second tension control device (300); and a third tension control device (400).

[0034] The mooring line (100) of the present invention is composed of an anchor (110) located on the seabed; and a chain (120) extending from the anchor (110).

[0035] A mooring line (100) of this type is provided in multiple numbers, more specifically in three numbers, with one anchor (110) positioned at one point on the seabed, another anchor (110) positioned at another point on the seabed, and another anchor (110) positioned at another point on the seabed, and each of the chains (120) extending from the anchors (110) is connected to one corner of the mooring target marine structure (10) having a triangular plane, thereby suppressing the flow of the marine structure (10).

[0036] Meanwhile, a rope can be connected to one end of the chain (120) of the mooring line (100) in the longitudinal direction.

[0037] Therefore, the chain (120) can be towed by pulling the rope through the winch provided on the ship.

[0038] The first tension control device (200) of the present invention is arranged on one of a plurality of bollards (11) provided in each of three directions of a marine structure (10) to be moored, and is connected to a chain (120) of one of the mooring lines (100), and controls the progress of the chain (120) connected between the inlet (211) and the outlet (212) of the body (210) through the behavior of a blocking member (220) provided on the body (210).

[0039] The first tension control device (200) of this type controls the progress of the chain (120) between the inlet (211) and the outlet (212) of the body (210) through the behavior of the blocking member (220), and in particular, by allowing the progress of the chain (120) from the inlet (211) of the body (210) to the outlet (212), the tension of the chain (120) can be controlled by pulling the chain (120) that has flowed out to the outlet (212), and by blocking the progress of the chain (120) from the outlet (212) of the body (210) to the inlet (211), unintended detachment of the chain (120) from the body (210) can be prevented.

[0040] At this time, the first tension control device (200) includes a pulley (230) that is rotatably arranged on the body (210) and comes into contact with the chain (120); and a cylinder (240) that is connected and installed between the body (210) and the blocking member (220), and in which the rod (241) is moved in and out by hydraulic or pneumatic action; so that not only can the chain (120) progress by the rotation of the pulley (230), but also the progress of the chain (120) can be controlled by the behavior of the blocking member (220) due to the rod (241) moving in and out of the cylinder (240).

[0041] Here, the blocking member (220) moves, more specifically, by the entry and exit of the load (241) of the cylinder (240), and as the blocking member (220) rises and the contact with the chain (120) is released, the chain (120) can progress, and as the blocking member (220) descends and comes into contact with the chain (120), the progress of the chain (120) can be blocked.

[0042] Additionally, the first tension control device (200) may further include a guide roller (250) that supports the chain (120) between the inlet (211) and the outlet (212) of the body (210).

[0043] At this time, the guide rollers (250) are provided in multiple pieces and are arranged at a constant interval between the two side plates of the body (210), so that the sagging of the chain (120) can be prevented as each of them contacts the lower end of the chain (120), and the progress of the chain (120) can be made smooth as each of them rotates.

[0044] In addition, the guide roller (250) includes a protective layer (251) that surrounds the outer surface, so that not only can damage to the guide roller (250) be prevented by the protective layer (251), but also damage to the chain (120) that comes into contact with it can be prevented.

[0045] Here, the protective layer (251) is made of rubber, so that the shock applied from the outside can be mitigated due to the characteristics of the material, thereby preventing damage to the guide roller (250) and the chain (120).

[0046] Meanwhile, the first tension control device (200) may be of any conventional structure and type as long as the chain (120) can be advanced by the rotation of the pulley (230) and the advance of the chain (120) can be controlled by the movement of the blocking member (220) due to the entry and exit of the load (241) of the cylinder (240). An example of this may be a stopper for a lead chain (120).

[0047] In addition, the bollard (11) to which the first tension control device (200) is connected and installed includes a support member (12) provided with a support shaft (12a) extending in a vertical direction, so that one end of the body (210) of the first tension control device (200) can rotate around the support shaft (12a) as it is connected to the support shaft (12a).

[0048] The second tension control device (300) of the present invention is arranged on another one of the plurality of bollards (11) provided in each of the three directions of the marine structure (10) to be moored, and is connected to the chain (120) of another mooring line (100), and controls the progress of the chain (120) connected between the inlet (311) and the outlet (312) of the body (310) through the behavior of the blocking member (320) provided on the body (310).

[0049] The second tension control device (300) of this type controls the progress of the chain (120) between the inlet (311) and the outlet (312) of the body (310) through the behavior of the blocking member (320), and in particular, by allowing the progress of the chain (120) from the inlet (311) of the body (310) to the outlet (312), the tension of the chain (120) can be adjusted by pulling the chain (120) that has flowed out to the outlet (312), and by blocking the progress of the chain (120) from the outlet (312) of the body (310) to the inlet (311), unintended detachment of the connecting chain (120') from the body (310) can be prevented.

[0050] At this time, the second tension control device (300) includes a pulley (330) that is rotatably arranged on the body (310) and comes into contact with the chain (120); and a cylinder (340) that is connected and installed between the body (310) and the blocking member (320), and in which the rod (341) is moved in and out by hydraulic or pneumatic action; so that not only can the chain (120) progress by the rotation of the pulley (330), but also the progress of the connecting chain (120') can be controlled by the behavior of the blocking member (320) due to the rod (341) moving in and out of the cylinder (340).

[0051] Here, the blocking member (320) is raised and lowered by the entry and exit of the load (341) of the cylinder (340). As the blocking member (320) rises and contact with the chain (120) is released, the chain (120) can advance. As the blocking member (320) descends and contacts the chain (120), the advance of the chain (120) can be blocked.

[0052] Additionally, the second tension control device (300) may further include a guide roller (350) that supports the chain (120) between the inlet (311) and the outlet (312) of the body (310).

[0053] At this time, the guide rollers (350) are provided in multiple pieces and are arranged at a constant interval between the two side plates of the body (310), so that the sagging of the chain (120) can be prevented as each of them contacts the lower end of the chain (120), and the progress of the chain (120) can be made smooth as each of them rotates.

[0054] And since the guide roller (350) includes a protective layer (351) that surrounds the outer surface, not only can damage to the guide roller (350) be prevented by the protective layer (351), but damage to the chain (120) that comes into contact with it can also be prevented.

[0055] Here, the protective layer (351) is made of rubber, so that the shock applied from the outside can be mitigated due to the characteristics of the material, thereby preventing damage to the guide roller (350) and the chain (120).

[0056] Meanwhile, the second tension control device (300) may be of any conventional structure and type as long as the chain (120) can be advanced by the rotation of the pulley (330) and the advance of the chain (120) can be controlled by the movement of the blocking member (320) due to the entry and exit of the load (341) of the cylinder (340). An example of this may be a submersible mooring pulley.

[0057] In addition, the bollard (11) to which the second tension control device (300) is connected and installed includes a connecting member (13) having a 'U'-shaped ring (13a) provided at the tip, so that one end of the body (310) of the second tension control device (300) is connected to the 'U'-shaped ring (13a) of the connecting member (13), thereby enabling the connection and installation of the second tension control device (300) to the bollard (11) of the marine structure (10) to be easily accomplished, and also enabling the separation of the second tension control device (300) from the bollard (11) of the marine structure (10) to be easily accomplished by separating the 'U'-shaped ring (13a).

[0058] At this time, the connecting member (13) is connected to the bollard (11) so that it can rotate up and down, so that the second tension control device (300) can move in the up and down direction as the connecting member (13) rotates up and down.

[0059] In addition, not only can one end of the body (310) of the second tension control device (300) be directly connected to the connecting member (13), but a connecting chain (120') extending from one end of the body (310) of the second tension control device (300) can also be connected.

[0060] The third tension control device (400) of the present invention is arranged on another one of the plurality of bollards (11) provided in each of the three directions of the marine structure (10) to be moored, and is connected to a chain (120) of another mooring line (100), and controls the progress of the chain (120) connected between the inlet (411) and the outlet (412) of the body (410) through the behavior of the blocking member (420) provided on the body (410).

[0061] This third tension control device (400) is the same as the second tension control device (300) except that it is placed on another one of the multiple bollards (11) provided in each of the three directions of the marine structure (10) and connected to the chain (120) of another mooring line (100). Therefore, a detailed description of the third tension control device (400) is omitted.

[0062] Meanwhile, the bollard (11) to which the third tension control device (400) is connected and installed includes a connecting member (13) having a 'U'-shaped ring (13a) provided at the tip, so that one end of the body (410) of the third tension control device (400) is connected to the 'U'-shaped ring (13a) of the connecting member (13), thereby enabling the connection and installation of the third tension control device (400) to the bollard (11) of the marine structure (10) to be easily accomplished, and also enabling the separation of the third tension control device (400) from the bollard (11) of the marine structure (10) to be easily accomplished by separating the 'U'-shaped ring (13a).

[0063] At this time, the connecting member (13) is connected to the bollard (11) so that it can rotate up and down, so that the third tension control device (400) can move in the up and down direction as the connecting member (13) rotates up and down.

[0064] In addition, not only can one end of the body (410) of the third tension control device (400) be directly connected to the connecting member (13), but a connecting chain (120') extending from one end of the body (410) of the third tension control device (400) can also be connected.

[0065] Meanwhile, as illustrated in FIG. 10, a method for mooring a marine structure using a detachable mooring system (A) for a marine structure according to the present invention includes a mooring line installation step (S1); a first tension control device installation step (S2); a marine structure towing step (S3); and a mooring line connection step (S4).

[0066] The mooring line installation step (S1) of the present invention installs a first mooring line (100) composed of an anchor (110) and a chain (120), a second mooring line (100) composed of an anchor (110) and a chain (120), wherein a second tension control device (300) is connected to the chain (120); and a third mooring line (100) composed of an anchor (110) and a chain (120), wherein a third tension control device (400) is connected to the chain (120), at a mooring point of a marine structure (10).

[0067] In the mooring line installation step (S1), the second tension control device (300) and the third tension control device (400) are as described above, and detailed descriptions of the second tension control device (300) and the third tension control device (400) are omitted.

[0068] The first tension control device installation step (S2) of the present invention connects and installs the first tension control device (200) to one of a plurality of bollards (11) provided in three directions of a marine structure (10) anchored to the shore.

[0069] In the first tension control device installation step (S2), the first tension control device (200) is as described above, and a detailed description of the first tension control device (200) is omitted.

[0070] The marine structure towing step (S3) of the present invention tows the marine structure (10) to which the first tension control device (200) is connected to a mooring point.

[0071] At this time, towing of the marine structure (10) is performed by moving the ship.

[0072] The mooring line connecting step (S4) of the present invention connects the first, second, and third mooring lines (100) to the three directions of the marine structure (10) towed to the mooring point, respectively, by connecting the chain (120) of the first mooring line (100) to the first tension control device (200), connecting the connecting chain (120') extending to the outside of the outlet (312) of the second tension control device (300) of the second mooring line (100) to another one of the plurality of bollards (11), connecting the third tension control device (400) to the third mooring line (100), and then connecting the connecting chain (120') extending to the outside of the outlet (412) of the third tension control device (400) to another one of the plurality of bollards (11).

[0073] In addition, the method for mooring a marine structure using the detachable mooring system (A) for a marine structure according to the present invention may further include a tension control step (S5).

[0074] The tension control step (S5) of the present invention controls the tension by pulling the chain (120) of the first tension control device (200) after the mooring line connection step (S4).

[0075] Therefore, the tension of the chain (120) is controlled by the tension control step (S5), and more specifically, as the tension increases, the mooring state of the marine structure (10) can be stably maintained.

[0076] At this time, the chain (120) can be pulled by the operation of a winch provided on the ship.

[0077] In addition, the method for mooring a marine structure using the detachable mooring system (A) for a marine structure according to the present invention may further include an auxiliary tension control step (S6).

[0078] The auxiliary tension control step (S6) of the present invention controls the tension by pulling the connecting chain (120') of the second tension control device (300) and the third tension control device (400) after the tension control step.

[0079] Therefore, the tension of the chain (120) is controlled by the auxiliary tension control step, and more specifically, as the tension increases, the mooring state of the marine structure (10) can be maintained more stably.

[0080] At this time, the connecting chain (120') can be pulled by the operation of a winch provided on the ship.

[0081]

[0082] The mooring of a marine structure (10) using the detachable mooring system (A) for a marine structure according to the present invention is described in detail as follows.

[0083] First, the first, second and third mooring lines (100) are installed at the mooring points.

[0084] That is, the mooring line installation step (S1) according to the present invention is carried out.

[0085] At this time, the first mooring line (100) is floated on the sea by tying a buoy (not shown in the drawing) with the anchor (110) located at one point on the seabed and the chain (120) extending from the anchor (110) to the buoy, the second mooring line (100) is floated on the sea by tying a buoy with the anchor (110) located at another point on the seabed and the chain (120) extending from the anchor (110) to the second tension control device (300), and the third mooring line (100) is floated on the sea by tying a buoy with the anchor (110) located at another point on the seabed and the chain (120) extending from the anchor (110) to the third tension control device (400).

[0086] Next, a first tension control device (200) is connected and installed to one of the multiple bollards (11) provided in three directions of a marine structure (10) anchored on the shore.

[0087] That is, the first tension control device installation step (S2) according to the present invention is performed.

[0088] Here, one of the bollards (11) to which the first tension control device (200) is connected may include a support member (12) provided with a support shaft (12a) extending in a vertical direction, and as shown in FIG. 2, one end of the body (210) of the first tension control device (200) is connected to the support shaft (12a), so that it can rotate around the support shaft (12a).

[0089] Next, the marine structure (10) is towed to a mooring point. That is, the marine structure towing step (S3) according to the present invention is performed.

[0090] At this time, the marine structure (10) can be towed to a mooring point by moving the ship by being connected to the ship by a rope or the like.

[0091] Next, the first, second and third mooring lines (100) are connected to the three directions of the marine structure (10) towed to the mooring point.

[0092] That is, the mooring line connection step (S4) according to the present invention is performed.

[0093] At this time, the first mooring line (100) can be connected to the marine structure (10) as one end of the chain (120) extending from the anchor (110) is inserted into the first tension control device (200), the second mooring line (100) can be connected to the marine structure (10) as the second tension control device (300) connected to the chain (120) extending from the anchor (110) is connected to another one of the plurality of bollards (11) provided in three directions of the marine structure (10), and the third mooring line (100) can be connected to the marine structure (10) as the third tension control device (400) connected to the chain (120) extending from the anchor (110) is connected to another one of the plurality of bollards (11) provided in three directions of the marine structure (10).

[0094] Here, the second tension control device (300) and the third tension control device (400) may be connected and installed to a bollard (11) and the other may include a connecting member (13) having a 'U'-shaped ring (13a) provided at the tip, so that as shown in FIG. 3, one end of the body (310, 410) of the second tension control device (300) and the third tension control device (400) or one end of the connecting chain (120') extending from one end of the body (310, 410) is connected to the 'U'-shaped ring (13a) of the connecting member (13), so that the connection with the marine structure (10) can be simply made.

[0095] In this way, by connecting the first, second, and third mooring lines (100) in the three directions of the marine structure (10), the flow of the marine structure (10) is suppressed, thereby enabling mooring.

[0096] However, if the tension of the chain (120) of the first, second and third mooring lines (100) connecting the seabed and the marine structure (10) is low, in other words, if the chain (120) is loose, the marine structure (10) may float, and thus the mooring state may become unstable.

[0097] However, in the present invention, the first tension control device (200) controls the progress of the chain (120) between the inlet (211) and the outlet (212) of the body (210) through the behavior of the blocking member (220) provided in the body (210) as shown in FIG. 4, that is, the progress of the chain (120) from the outlet (212) of the body (210) to the inlet (211) is blocked, while the progress of the chain (120) from the inlet (211) of the body (210) to the outlet (212) is allowed. As shown in FIG. 8, when the first, second, and third mooring lines (100) are connected to the three directions of the marine structure (10), the chain (120) provided in the first mooring line (100) extending to the outside of the outlet (212) of the first tension control device (200) is pulled through the winch of the ship, thereby controlling the first, second, and third Since the tension of the chain (120) can be increased in each mooring line (100), the flow of the marine structure (10) can be suppressed, so that the mooring state can be maintained stably.

[0098] At this time, the first tension control device (200) includes a pulley (230) that is rotatably arranged on the body (210) and comes into contact with the chain (120); and a cylinder (240) that is connected and installed between the body (210) and the blocking member (220), and in which the rod (241) is moved in and out by hydraulic or pneumatic action; so that when the chain (120) moves by rotation of the pulley (230), the movement of the chain (120) can be controlled by the behavior of the blocking member (220) due to the rod (241) moving in and out of the cylinder (240).

[0099] Here, the blocking member (220) is raised and lowered by the entry and exit of the load (241) of the cylinder (240). As the blocking member (220) rises and contact with the chain (120) is released, the chain (120) can advance. As the blocking member (220) descends and contacts the chain (120), the advance of the chain (120) can be blocked.

[0100] In addition, the second tension control device (300) and the third tension control device (400) of the present invention, as shown in FIG. 5, similarly to the first tension control device (200), blocks the progress of the chain (120) between the inlet (311, 411) and the outlet (312, 412) of the body (310, 410) through the behavior of the blocking member (320, 420) provided in the body (310, 410), that is, blocks the progress of the chain (120) from the outlet (312, 412) of the body (310, 410) to the inlet (311, 411), while allowing the progress of the chain (120) from the inlet (311, 411) of the body (310, 410) to the outlet (312, 412), thereby allowing the progress of the chain (120) in the three directions of the marine structure (10). By pulling the chain (120) of the second mooring line (100) extending to the outside of the second tension control device (300) outlet (312) and the chain (120) of the third mooring line (100) extending to the outside of the third tension control device (400) outlet (412) through the winch of the ship as shown in FIG. 9 while the first, second and third mooring lines (100) are connected, the tension of the chains (120) of each of the first, second and third mooring lines (100) can be increased, and thus the movement of the marine structure (10) can be suppressed, and the mooring state can be maintained more stably.

[0101] Meanwhile, the detachable mooring system (A) for marine structures according to the present invention can prevent damage to the first tension control device (200), the second tension control device (300), and the third tension control device (400) when adjusting the tension of the first, second, and third mooring lines (100).

[0102] That is, the first tension control device (200), the second tension control device (300) and the third tension control device (400) of the present invention may further include guide rollers (250, 350, 450) that support the chain (120) or the connecting chain (120') between the inlet (211, 311, 411) and the outlet (212, 312, 412) of the body (210, 310, 410) as shown in FIG. 6, and in particular, the guide rollers (250, 350, 450) may be provided in multiple numbers and arranged at a constant interval between the two side plates of the body (210, 310, 410), so that when pulling the chain (120) or the connecting chain (120') to adjust the tension of the first, second and third mooring lines (100), each As the guide rollers (250, 350, 450) contact the bottom of the chain (120), sagging of the chain (120) can be prevented, and as each guide roller (250, 350, 450) rotates, the progression of the chain (120) can be made smooth, so damage to the body (210, 310, 410) can be prevented.

[0103] Here, the guide roller (250, 350, 450) includes a protective layer (251, 351, 451) that surrounds the outer surface as shown in FIG. 7, and the protective layer (251, 351, 451) may be made of rubber in particular, so that the shock applied from the outside can be alleviated due to the material properties of the protective layer (251, 351, 451), and thus, not only can damage to the guide roller (250, 350, 450) be prevented, but also damage to the chain (120) can be prevented.

[0104]

[0105] The present invention as described above is not limited to the above-described embodiments, and thus may be modified within a scope that does not depart from the gist of the present invention as claimed in the claims, and such modifications are within the scope of protection of the present invention defined by the following claims.

[0106]

[0107] [Explanation of symbols]

[0108] 10: Marine structures 11: Bollards

[0109] 12: Support member 12a: Support shaft

[0110] 13: Connecting member 13a: 'U' shaped ring

[0111] 100: Mooring line 110: Anchor

[0112] 120: Chain 120': Link Chain

[0113] 200: First tension control device 300: Second tension control device

[0114] 400: Third tension control device 210, 310, 410: Body

[0115] 211, 311, 411: Entrance 212, 312, 412: Exit

[0116] 220, 320, 420: Blocking member 230, 330, 430: Pulley

[0117] 240, 340, 440: Cylinder 241, 341, 441: Rod

[0118] 250, 350, 450: Guide roller 251, 351, 451: Protective layer

[0119] A: Mooring system S1: Mooring line installation stage

[0120] S2: First tension control device installation stage S3: Offshore structure towing stage

[0121] S4: Mooring line connection stage S5: Tension adjustment stage

[0122] S6: Auxiliary tension control stage

[0123] The present invention not only enables stable mooring of a marine structure and quick and safe withdrawal of a moored marine structure in an emergency situation, but also reduces manufacturing costs by simplifying the structure, shortens the time required for mooring a marine structure, and facilitates maintenance during operation, so it has industrial applicability related to the production of a detachable mooring system for marine structures.

Claims

1. A plurality of mooring lines consisting of anchors and chains extending from the anchors, each located at one point on the seabed, another point, and yet another point; A first tension control device arranged on one of a plurality of bollards provided in three directions of a marine structure and connected to the chain of the mooring line, and controlling the progress of the chain between the inlet and the outlet of the body through the behavior of a blocking member provided on the body; A second tension control device arranged on another one of the plurality of above bollards and connected to the chain of another one of the above mooring lines, and controlling the progress of the chain between the inlet and the outlet of the body through the behavior of a blocking member provided on the body; and A detachable mooring system for a marine structure, characterized by including a third tension control device, which is arranged on another one of the plurality of above-mentioned bollards and connected to the chain of another one of the above-mentioned mooring lines, and which controls the progress of the chain extending between the inlet and the outlet of the body through the behavior of a blocking member provided on the body.

2. In paragraph 1, A detachable mooring system for a marine structure, characterized in that the bollard to which the first tension control device is connected and installed includes a support member having a support axis extending in a vertical direction.

3. In paragraph 1, A detachable mooring system for marine structures, characterized in that the bollard to which the first and second tension control devices are connected and installed includes a connecting member having a 'U'-shaped ring provided at the tip.

4. In paragraph 1, A mooring system for a marine structure, characterized in that the first, second and third tension adjusting devices include a pulley rotatably arranged on the body and in contact with the chain; and a cylinder connected between the body and the blocking member, wherein the rod is moved in and out by hydraulic or pneumatic action.

5. In paragraph 4, A detachable mooring system for marine structures, characterized in that the first, second and third tension control devices further include a guide roller that supports the chain between the inlet and the outlet of the body.

6. In paragraph 5, A detachable mooring system for marine structures, characterized in that the above guide rollers are provided in multiple pieces and arranged with a constant interval between the two side plates of the body.

7. In paragraph 5, A detachable mooring system for marine structures, characterized in that the above guide roller includes a protective layer covering the outer surface.

8. A mooring line installation step of installing a first mooring line made of an anchor and a chain, a second mooring line made of an anchor and a chain and having a second tension adjusting device connected to the chain, and a third mooring line made of an anchor and a chain and having a third tension adjusting device connected to the chain at a mooring point; A first tension control device installation step of connecting and installing a first tension control device to one of multiple bollards installed in three directions of a marine structure anchored on the shore; A marine structure towing step for towing the marine structure to which the first tension control device is connected to the marine structure to the mooring point; and A method for mooring a marine structure using a detachable mooring system for marine structures, characterized by including a mooring line connecting step of respectively connecting the first, second, and third mooring lines in three directions of the marine structure towed to the mooring point, connecting the chain of the first mooring line to the first tension control device, connecting the second tension control device of the second mooring line to another one of the plurality of bollards, and connecting the third tension control device of the third mooring line to another one of the plurality of bollards;

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