KR20160084243A - Submersible mooring apparatus and submersible mooring system having the same - Google Patents

Submersible mooring apparatus and submersible mooring system having the same Download PDF

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Publication number
KR20160084243A
KR20160084243A KR1020150000874A KR20150000874A KR20160084243A KR 20160084243 A KR20160084243 A KR 20160084243A KR 1020150000874 A KR1020150000874 A KR 1020150000874A KR 20150000874 A KR20150000874 A KR 20150000874A KR 20160084243 A KR20160084243 A KR 20160084243A
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KR
South Korea
Prior art keywords
buoyant body
variable
mooring
compressed gas
buoyancy
Prior art date
Application number
KR1020150000874A
Other languages
Korean (ko)
Inventor
박장익
문정윤
김대성
임병권
Original Assignee
오션어스(주)
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Application filed by 오션어스(주) filed Critical 오션어스(주)
Priority to KR1020150000874A priority Critical patent/KR20160084243A/en
Priority to PCT/KR2015/000649 priority patent/WO2016111408A1/en
Publication of KR20160084243A publication Critical patent/KR20160084243A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • B63B22/023—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids submerged when not in use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
    • B63B21/507—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets
    • B63B21/508—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers with mooring turrets connected to submerged buoy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/18—Buoys having means to control attitude or position, e.g. reaction surfaces or tether
    • B63B22/20—Ballast means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/22—Inflatable buoys with gas generating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B2022/028—Buoys specially adapted for mooring a vessel submerged, e.g. fitting into ship-borne counterpart with or without rotatable turret, or being releasably connected to moored vessel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2207/00—Buoyancy or ballast means
    • B63B2207/02—Variable ballast or buoyancy

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wind Motors (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

According to an embodiment of the present invention, a submersible mooring apparatus is provided. The submersible mooring apparatus, according to an embodiment of the present invention, comprises: a buoyancy body which generates buoyancy; a variable buoyancy body which is coupled to the buoyancy body and injects ballast water or gas into the buoyancy body to control the buoyancy of the buoyancy body; a compressed gas tank for storing compressed gas therein and injecting the gas into the variable buoyancy body; a communication part which communicates with the outside; a control part which controls the compressed gas tank by receiving a control signal from the communication part and controls the buoyancy of the variable buoyancy body; and a mooring line which connects either the buoyancy body or the variable buoyancy body to the seabed. Therefore, the submersible mooring apparatus descends to the underwater or ascends to the surface of the water by controlling buoyancy.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submersible mooring apparatus and a submersible mooring apparatus having the same,

The present invention relates to a submergible mooring apparatus and a submerged mooring system including the same, and more particularly, to a submerged mooring apparatus capable of descending into water or rising to sea level by controlling buoyancy, and a submerged mooring system including the same .

In general, various offshore structures such as ships that float at sea and perform operations require a mooring device to maintain its position against external forces such as wind, waves, and currents. At this time, a turret is mainly used as a mooring device. The mooring method using the turret is a mooring system that turns the offshore structure in compliance with the direction of the external force, and the offshore structure can rotate the turret connected to the mooring line on the pivot axis. Therefore, the offshore structure can perform the operation while being moored to a certain position despite the influence of the external force. Such a turret can be formed integrally with the offshore structure or can be formed independently.

On the other hand, when the turret and the ocean structure are formed independently of each other, the turret floats to a predetermined position by the mooring line connected to the sea floor, and is coupled with the adjacent offshore structure to moor the offshore structure. However, the turret is always floated on the sea surface and is likely to collide with other marine structures or ice floes that are sailing, and it is difficult to support the offshore structures in severe weather conditions such as typhoons. In addition, when an external force such as wind, waves, algae or the like acts strongly, the tension acting on the mooring line may increase and the mooring line may be damaged.

Korea Patent Publication No. 10-2010-0118109 Nov. 11, 2010

SUMMARY OF THE INVENTION It is an object of the present invention to provide a submersible mooring device capable of descending into water or ascending to sea level by adjusting buoyancy.

Another object of the present invention is to provide a submerged mooring system including a submergible mooring device capable of descending into water or rising to sea level by regulating buoyancy.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a submergible mooring system including a buoyant body for generating buoyancy, a variable buoyant body coupled to the buoyant body and injecting a ballast water or gas into the buoyant body, A compression gas tank for storing compressed gas therein and injecting a gas into the variable buoyant body; a communication unit for communicating with the outside; and a controller for controlling the compressed gas tank by receiving a control signal from the communication unit, And a mooring line connecting one of the buoyant body and the variable buoyant body to the bottom surface.

The buoyant body includes a receiving space which is hermetically sealed to maintain buoyancy, and the compressed gas tank can be accommodated in the receiving space.

The compressed gas tank may further include a gas filling pipe for filling a compressed gas therein, and the gas filling pipe may be connected to the outside through the hatch.

The buoyant body is located above the variable buoyant body, and the buoyant body and the variable buoyant body may be in a cone shape.

The variable buoyant body may further include at least one connection pipe vertically penetratingly inserted therein, one end of which is located in the accommodation space and the other end is located in the water.

A first valve connected to the compressed gas tank and the variable buoyant body for opening and closing a first flow line for injecting the gas stored in the compressed gas tank into the variable buoyant body, a first valve controlled by the control unit, And a second valve that opens and closes a second flow line for discharging the accommodated gas to the outside and is controlled by the controller.

And a notch portion formed by inserting one side of the buoyant body or the variable buoyant body inwardly, wherein a plurality of the notches can be symmetrically disposed about the center of the buoyant body or the variable buoyancy body.

In the cross-sectional shape of the buoyant member or the variable buoyant member cut to pass through the notch portion, the notch portion may have a polygonal shape.

According to another aspect of the present invention, a submergible mooring system includes a submergible mooring device and an offshore structure moored by the submerged mooring device, wherein the submerged mooring device generates buoyancy And a compression gas tank which is connected to the buoyant body and injects ballast water or gas into the buoyant body to adjust the buoyancy, a compression gas tank which stores the compressed gas inside and injects gas into the variable buoyancy body, , A mooring line connecting one of the buoyant body and the variable buoyant body to the bottom of the sea floor, and one side of the buoyant body or the variable buoyant body being formed inwardly, and the buoyant body or the variable buoyant body And a plurality of notches symmetrically disposed about the center, wherein the offshore structure includes a bearing portion disposed outside the submergible mooring device, A fixed ring that is seated on the upper end of the bearing portion and rotates about the submerged mooring device along the bearing, and a fixed ring which is seated on the upper end of the fixed ring and slides toward the submergible mooring device, And a plurality of stoppers.

The actuator may further include an actuator that is fixed to the stationary ring and slidably moves the stopper, and operates by hydraulic pressure, pneumatic pressure, or electricity.

In the cross-sectional shape of the buoyant member or the variable buoyant member cut to pass through the notch portion, the notch portion may be polygonal.

And a plurality of guide wheels installed on the offshore structure and rotating in contact with the outer circumferential surface of the submergible mooring device.

According to the invention, the mooring device can be submerged below sea level. Therefore, it is possible to prevent the other sea structures or the drift ice and the mooring device from colliding with each other. In addition, submersible moorings can be easily separated from offshore structures in harsh weather conditions such as typhoons. Therefore, the offshore structures can be easily swept to areas with good weather conditions, and the submersible mooring structures can quickly submerge into water with less influence by external forces such as wind and waves.

When the submersible mooring device submerges in water, the tension acting on the mooring line can be remarkably reduced, and breakage of the mooring line can be prevented.

1 is a bottom perspective view illustrating a submersible mooring device according to an embodiment of the present invention.
2 is a longitudinal sectional view of the submerged mooring device of FIG. 1;
Figure 3 is an incisional perspective view showing a submerged mooring system.
4 is a longitudinal section view of the submersible mooring system of Fig. 3;
5 is a cutaway perspective view showing a state in which a stopper is inserted into a notch portion.
6 is an operational view for explaining the operation of the submersible mooring device.
7 to 9 are views showing an example of using a submersible mooring device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 to 9, a submersible mooring apparatus according to an embodiment of the present invention and a submerged mooring system including the same will be described in detail.

The submergible mooring device and the submergible mooring system including the submerged mooring system according to an embodiment of the present invention are for mooring various offshore structures such as a ship at one point in the sea, And to connect various equipments. That is, the submersible mooring device and the submerged mooring system including the submooring mooring device moor the marine structure within a certain range so that the marine structure can work using the seabed facility. Herein, the term "offshore structure" refers to various structures floating on the sea, including not only propulsion structures such as ships but also structures that do not have propulsive force pulled by barges and the like.

A submersible mooring system and a submersible mooring system including the submersible mooring system are capable of submerging the mooring device below sea level. Therefore, it is possible to prevent the other sea structures or the drift ice and the mooring device from colliding with each other. In addition, submersible moorings can be easily separated from offshore structures in harsh weather conditions such as typhoons. Therefore, the offshore structures can be easily swept to areas with good weather conditions, and the submersible mooring structures can quickly submerge into water with less influence by external forces such as wind and waves. When the submersible mooring device submerges in water, the tension acting on the mooring line can be remarkably reduced, and breakage of the mooring line can be prevented.

Hereinafter, with reference to Figs. 1 to 5, the submersible mooring apparatus 1 and the submerged mooring system 100 including the same will be described in detail.

FIG. 1 is a bottom perspective view showing a submergible mooring apparatus according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the submerged mooring apparatus of FIG. 1. FIG. FIG. 3 is an exploded perspective view showing a submerged mooring system, FIG. 4 is a longitudinal sectional view of the submerged mooring system of FIG. 3, and FIG. 5 is a cutaway perspective view showing a state where a stopper is inserted into the notch.

The submergible mooring apparatus 1 according to the present invention includes a buoyant body 10, a variable buoyant body 20, a compressed gas tank 30, a communication unit 60, a control unit 50, 40). The submerged mooring system 100 according to the present invention includes an offshore structure (see 200 in FIG. 8) moored by the submerged mooring device 1 and the submerged mooring device 1, (1) comprises a buoyant body (10), a variable buoyant body (20), a compressed gas tank (30), a mooring line (40) and a notch (80), and the offshore structure (200) A stationary ring 120, and a stopper 130.

The buoyant body 10 generates buoyancy, and may be formed of a material having self buoyancy or be formed in the form of an empty buoyancy tank. 2, the buoyant body 10 may have a receiving space 10a therein, and the receiving space 10a may be closed by the hatch 11 to maintain buoyancy. Although the hatch 11 is illustrated as being hinged to the upper surface of the buoyant body 10 in the drawing, the present invention is not limited thereto, and the position of the hatch 11 and the joining method may be variously modified. The variable buoyant body 20 is coupled to one side of the buoyant body 10.

The variable buoyant body 20 may be formed in the form of a ballast tank by injecting ballast water or gas into the inside thereof to adjust the buoyancy. That is, when the ballast water is injected into the variable buoyant body 20, the buoyant force is reduced and the buoyant body 10 and the variable buoyant body 20 can descend below the sea level. Conversely, when gas is injected into the variable buoyant body 20, the buoyant force is increased and the buoyant body 10 and the variable buoyant body 20 can float on the sea surface.

The variable buoyant body 20 can be fixedly coupled to the lower surface of the buoyant body 10. In other words, the buoyant body 10 is located on top of the variable buoyant body 20, and the buoyant body 10 and the variable buoyant body 20 can take the form of a cone. The variable buoyant body 20 is fixedly coupled to the lower surface of the buoyant body 10, so that the ballast water or the gas can easily flow in and out. That is, the ballast water can easily flow in or out through the through hole 20a formed through the lower surface of the variable buoyant body 20, and the gas can be easily introduced from the compressed gas tank 30, which will be described later. In addition, since the buoyant body 10 and the variable buoyant body 20 have a cone shape, the internal space area of the variable buoyant body 20 can be made larger than the internal space area of the buoyant body 10. Therefore, a larger amount of ballast water or gas can be accommodated in the variable buoyant body 20, so that buoyancy control of the variable buoyant body 20 can be facilitated. However, the variable buoyant body 20 is fixedly coupled to the lower surface of the buoyant body 10, and the buoyant body 10 and the variable buoyant body 20 are not limited to be cone- And the shape of the buoyant body 10 and the variable buoyant body 20 can be variously modified. The variable buoyant body (20) receives gas from the compressed gas tank (30).

The compressed gas tank 30 can be accommodated inside the accommodation space 10a by storing the compressed gas therein and injecting the gas into the variable buoyancy member 20. [ That is, the compressed gas tank 30 is located in the receiving space 10a of the buoyant body 10 and injects the gas into the variable buoyant body 20 through the first flow line 31. [ The first flow line 31 is a hollow tube that connects between the compressed gas tank 30 and the variable buoyant body 20 and injects the gas stored in the compressed gas tank 30 into the variable buoyant body 20 . The first flow line 31 penetrates the buoyant body 10 to connect the compressed gas tank 30 and the variable buoyant body 20 and can be opened and closed by at least one first valve 31a. At this time, the first flow line 31 can directly or indirectly inject the gas into the variable buoyant body 20. When the first flow line 31 indirectly injects gas into the interior of the variable buoyant body 20, the first flow line 31 can be coupled with a flexible material air tube (not shown) at its end . The air tube may be located inside the variable buoyant body 20 and may be inflated by the gas injected through the first flow line 31 to provide buoyancy to the variable buoyant body 20. A gas filling pipe (33) is connected to one side of the compressed gas tank (30).

The gas filling pipe 33 is a hollow tube for filling a compressed gas inside the compressed gas tank 30, and can be connected to the outside through the hatch 11. In other words, the gas filling pipe 33 is connected to the compressed gas tank 30 at one side and is detachably connected to the supply device (not shown) at the other side of the offshore structure 200, The compressed gas can be injected into the interior of the compressed gas tank 30. The gas filling pipe 33 is connected to one side of the compressed gas tank 30 so that the gas can be continuously injected into the compressed gas tank 30 and the variable buoyant body 20, 20 can be smoothly adjusted. At least one control valve 33a is provided on the gas filling pipe 33 to control the flow of the compressed gas.

The gas contained in the variable buoyant body 20 is discharged to the outside through the second flow line 32. The second flow line 32 is a hollow pipe connecting the inner space of the variable buoyant body 20 and the outside and can be opened and closed by at least one second valve 32a. The second flow line 32 is vertically refracted so that one side passes through the buoyant body 10 and the variable buoyant body 20 and communicates with the inner space of the variable buoyant body 20, The shape of the second flow line 32 and the arrangement structure of the second flow line 32 may be variously modified. For example, the second flow line 32 may be formed in a straight structure, and the second flow line 32 may pass through the variable buoyant body 20 so that one side communicates with the inner space of the variable buoyancy body 20, .

The first valve 31a of the first flow line 31 and the second valve 32a of the second flow line 32 may be electrically connected to the controller 50, respectively. The control unit 50 controls the buoyant force of the variable buoyant body 20 by controlling the operation of the compressed gas tank 30, that is, the first valve 31a and the second valve 32a, Lt; / RTI > The control unit 50 controls the first valve 31a or the second valve 32a by receiving a control signal from the communication unit 60 communicating with the outside, And can communicate with the outside through ultrasonic waves.

For example, when an obstacle such as drift ice (see I in FIG. 7) is detected, the communication unit 60 applies a first control signal to the control unit 50, The first valve 31a may be closed and the second valve 32a may be opened. Therefore, the gas contained in the variable buoyant body 20 can be discharged to the outside through the second flow line 32 and the ballast water can be introduced into the variable buoyant body 20 through the through hole 20a. As a result, the buoyant force of the variable buoyant body 20 is reduced, and the buoyant body 10 and the variable buoyant body 20 are lowered below the sea level to prevent collision with the obstacle.

Conversely, when the offshore structure 200 to be moored to the submergible mooring apparatus 1 is sensed, the communication section 60 applies a second control signal to the control section 50, and the control section 50 applies the second control signal The first valve 31a can be opened and the second valve 32a can be closed. Accordingly, the gas flows into the variable buoyant body 20 through the first flow line 31, and at the same time, the ballast water accommodated in the variable buoyant body 20 can be discharged to the outside through the through hole 20a. As a result, the buoyant force of the variable buoyant body 20 is increased, and the buoyant body 10 and the variable buoyant body 20 float on the sea surface and can be fastened to the offshore structure 200.

On the other hand, the mooring line (40) may be connected to either the buoyant body (10) or the variable buoyant body (20). The mooring line 40 connects any one of the buoyant body 10 and the variable buoyant body 20 to the bottom of the sea floor (see S in FIG. 7), and is formed in a chain- . However, the mooring line 40 is not limited to being in the form of a chain, for example, the mooring line 40 may be in the form of a hawser having a constant thickness. The mooring line 40 is fixed to an anchor member (see 41 in Fig. 7) fixed at one end to the underside surface (see S in Fig. 7), and the other end is fixed to either the buoyant body 10 or the variable buoyant body 20 Lt; / RTI > Hereinafter, the structure in which the mooring line 40 is connected to the variable buoyant body 20 will be described more specifically.

The support portion 21 is coupled to the outer side surface of the variable buoyant body 20, and a plurality of the support portions 21 are spaced apart from each other by a predetermined distance. Although four support portions 21 are illustrated as being coupled to the outer surface of the variable buoyant body 20 in the drawing, the number of the support portions 21 may be increased or decreased as needed. A chain guide portion (22) is hinged to each support portion (21). The chain guide portion 22 fixes and supports one end of the mooring line 40 and is hinged to the support portion 21 and can rotate around the hinge axis. Therefore, when the buoyant body 10 and the variable buoyant body 20 are lifted or lowered, the chain guide portion 22 rotates around the hinge axis to minimize deformation and breakage of the mooring line 40.

At least one connecting pipe (70) is passed through the variable buoyant body (20). The connecting pipe 70 is a hollow pipe connecting the riser (see R in FIG. 4) extending to the seabed and the flow line 210 connected to the offshore structure 200. The connecting pipe 70 includes a variable buoyant body 20, Is vertically penetrated. In other words, the connection pipe 70 can be positioned at one side end in the receiving space 10a and the other end through the variable buoyancy member 20 in the water. At this time, an auxiliary connection pipe 220 and a swivel pipe 230 may be interposed between the connection pipe 70 and the flow line 210. The auxiliary connection pipe 220 is a hollow pipe and is detachably coupled to the connection pipe 70. The auxiliary connection pipe 220 extends vertically from the connection pipe 70, and may be omitted if necessary. The swivel tube 230 is detachably coupled to the auxiliary connection pipe 220 at one side and rotatably coupled to the flow line 210 at the other side. The swivel pipe 230 is coupled between the auxiliary connection pipe 220 or the connection pipe 70 and the flow line 210 to prevent the riser R from being twisted so that natural gas, have.

On the other hand, a notch portion 80 is formed on one side of the buoyant body 10 or the variable buoyant body 20. The notch portion 80 is formed by inserting one side of the buoyant body 10 or the variable buoyant body 20 inward and symmetrically about a center of the buoyant body 10 or the variable buoyant body 20 . At this time, in the cross-sectional shape of the buoyant body 10 or the variable buoyant body 20 cut through the notch portion 80, the notch portion 80 may have a polygonal shape. The stopper 130 to be described later can be inserted and fixed by forming the notch portion 80 on one side of the buoyant body 10 or the variable buoyant body 20, The structures 200 can be fastened to each other. Hereinafter, a structure in which the notch portion 80 is formed on one side of the buoyant body 10 will be described more specifically.

3 and 5, the notch 80 is formed by inserting the outer surface of the buoyant body 10 inward, and a plurality of the notches 80 may be symmetrically disposed about the center of the buoyant body 10 . At this time, in the cross-sectional shape of the buoyant body 10 cut so as to pass through the notch portion 80, the notch portion 80 can have a polygonal shape. The stopper 130 can be easily inserted and removed and the stopper 130 can be brought into close contact with the notch portion 80 by the notch portion 80 having a polygonal shape. Thus, the submergible mooring device 1 and the marine structure 200 Can be firmly fastened. Although not shown, six notched portions 80 are formed on the outer surface of the buoyant body 10, but the present invention is not limited thereto. The number of the notched portions 80 can be increased or decreased as needed. Although the notch 80 is illustrated as being formed in a trapezoidal shape in the drawing, the shape of the notch 80 may be variously modified.

This submergible mooring system 1 is coupled to an offshore structure 200 to moor the offshore structure 200 to the sea while the submerged mooring system 100 includes a submergible mooring device 1, , A stationary ring (120), and a stopper (130).

3 and 4, the bearing portion 110 is a ring-shaped member having a predetermined thickness, and is installed in the offshore structure 200. In other words, the bearing part 110 is rotatably installed in the turret room 200a of the offshore structure 200 in which the submergible mooring device 1 is accommodated, and is disposed outside the submerged mooring device 1, And surrounds the mooring device (1). Although the turret room 200a is illustrated as being located between the forward portion and the aft portion of the offshore structure 200 in the drawing, the present invention is not limited thereto. For example, the turret room 200a may be located at a forward portion or a stern portion . The bearing portion 110 has a fixing ring 120 mounted thereon.

The stationary ring 120 is a ring-shaped member having a constant thickness and can be mounted on the upper end of the bearing portion 110 and rotated about the submergible mooring device 1 along the bearing portion 110. That is, the bearing portion 110 and the stationary ring 120 are inserted into the center of the inner peripheral surface of the bearing portion 110 through the submergible mooring device 1, and can rotate around the submergible mooring device 1. At this time, the inner circumferential surface of the stationary ring 120 is smaller than that of the bearing portion 110, so that the stationary ring 120 can be as close as possible to the outer surface of the conical buoyant body 10. The stationary ring 120 has a plurality of stoppers 130 mounted thereon.

The stopper 130 is a block-shaped member corresponding to the inner surface shape of the notch portion 80 and slides toward the submerging mooring device 1 and is inserted and fixed in the notch portion 80. That is, when the plurality of stoppers 130 are slid toward the submergible mooring device 1 and inserted and fixed in the notch 80, the submergible mooring device 1 and the offshore structure 200 can be fastened to each other have. Each stopper 130 is slidably moved by at least one actuator 140.

The actuator 140 is seated and fixed on the upper end of the stationary ring 120, and one side of the actuator 140 is connected to the stopper 130 to slide the stopper 130. The actuator 140 is composed of a hydraulic cylinder or a pneumatic cylinder, and can be operated by hydraulic pressure, pneumatic pressure, or electric power. However, the stopper 130 is not limited to the sliding movement by the actuator 140, and may be modified into various structures that allow the stopper 130 to slide and move. For example, the stopper 130 may slide or slide along the guide rail.

As described above, the bearing portion 110 and the stationary ring 120 can be rotated about the submergible mooring device 1. Therefore, when the submergible mooring apparatus 1 is rotated by the swivel tube 230, the actuator 140 and the stopper 130 mounted on the stationary ring 120 can also be rotated, Can be held in the state of being inserted into the notch portion 80. The actuator 140 and the stopper 130 can be stably supported because the inner circumferential surface of the stationary ring 120 is in close contact with the outer surface of the buoyant body 10 as much as possible. 130 can be smoothly operated.

Meanwhile, a plurality of guide wheels 150 may be installed on the offshore structure 200. Each of the guide wheels 150 is rotatably coupled to a rotary shaft 150a coupled to the inner surface of the turret room 200a and can rotate in contact with the outer peripheral surface of the submergible mooring device 1. [ That is, when the submergible mooring apparatus 1 is rotated by the swivel pipe 230, the guide wheel 150 contacts the outer circumferential surface of the buoyant body 10 or the variable buoyant body 20 and rotates to the submerged mooring apparatus 1). ≪ / RTI > The plurality of guide wheels 150 are spaced apart from each other by a predetermined distance and can rotate independently of each other.

In addition, a watertight member 160 may be installed in the offshore structure 200. The watertight member 160 is for sealing between the turret room 200a and the submergible mooring device 1 and may be formed of a ring-shaped member. The watertightness member 160 can reduce the interval between the turret room 200a and the submergible mooring apparatus 1 and in particular the variable buoyant body 20 to prevent the seawater from flowing into the turret room 200a. However, the watertightness member 160 is not limited to being installed on the inner surface of the turret room 200a. For example, the watertightness member 160 may be provided on the outer surface of the variable floating body 20. Further, the watertightness member 160 is not limited to a ring-shaped member, and the shape of the watertightness member 160 may be variously modified.

Hereinafter, the operation of the submersible mooring device 1 will be described in more detail with reference to FIG.

6 is an operational view for explaining the operation of the submersible mooring device.

The submersible mooring device 1 and the submerged mooring system 100 including the same according to an embodiment of the present invention can submerged the mooring device below sea level. Therefore, it is possible to prevent collision of the other ocean structure or the drift ice (I) with the mooring device. Further, the submersible mooring device 1 can be easily separated from the marine structure 200 in a severe weather situation such as a typhoon. Therefore, the offshore structure 200 can be easily repaired to a region having a good weather condition, and the submersible mooring device 1 can quickly submerge into water with less influence by external forces such as wind and waves. When the submerging mooring apparatus 1 submerges in water, the tension acting on the mooring line 40 can be remarkably reduced, and breakage of the mooring line 40 can be prevented.

6 (a) is a view showing the submerging mooring device being lowered and located below the sea surface, and Fig. 6 (b) is a view showing a state where the submerging mooring device is raised and located on the sea surface to be.

First, referring to Fig. 6 (a), the submersible mooring device 1 may be located below the sea level.

The buoyant body 10 has a receiving space 10a formed therein and the receiving space 10a is sealed by the hatch 11 to maintain buoyancy. The buoyant body (10) has a variable buoyant body (20) attached thereto. The variable buoyant body 20 flows the ballast water through the through hole 20a or flows the gas through the first flow line 31 and the second flow line 32. One end of the first flow line 31 opened and closed by the first valve 31a is connected to the compressed gas tank 30 and the compressed gas tank 30 is located inside the accommodating space 10a. The compressed gas tank 30 is supplied with gas through a gas fill tube 33 connected to one side and the gas fill tube 33 is opened and closed by a control valve 33a. One end portion of the second flow line 32 passes through the lower portion of the buoyant body 10 and the upper portion of the variable buoyant body 20 and the other end portion is bent and passes through the side portion of the buoyant body 10. The second flow line 32 is opened and closed by the second valve 32a. The first valve 31a and the second valve 32a are electrically connected to the control unit 50. The control unit 50 receives a control signal from the communication unit 60 located outside the buoyant body 10, 1 valve 31a or the second valve 32a. On one side of the variable buoyant body (20), a mooring line (40) connected to the seabed surface (S) is connected.

The communication unit 60 applies a first control signal to the control unit 50 when a sound wave or an ultrasonic wave transmitted from the offshore structure 200 is not detected or an obstacle such as the drift ice is detected by the communication unit 60. [ The control unit 50 closes the first valve 31a and opens the second valve 32a in accordance with the received first control signal. At this time, the control valve 33a can be kept closed. The gas contained in the variable buoyant body 20 can be discharged to the outside through the second flow line 32 by opening the second valve 32a. At the same time, the ballast water can flow into the variable buoyant body 20 through the through-hole 20a. Therefore, the buoyant force of the variable buoyant body 20 gradually decreases, and the buoyant body 10 and the variable buoyant body 20 can descend below the sea level. As the submerging mooring device 1 descends below sea level, collision with the obstacle can be prevented, and the tension applied to the mooring line 40 can be reduced, thereby preventing the mooring line 40 from being damaged.

Referring to Fig. 6 (b), the submergible mooring device 1 can float on the sea surface.

When a sound wave or an ultrasonic wave transmitted from the offshore structure 200 is detected by the communication unit 60, the communication unit 60 applies a second control signal to the control unit 50. The control unit 50 opens the first valve 31a and closes the second valve 32a in accordance with the received second control signal. At this time, the control valve 33a can be kept closed. The first valve 31a is opened so that the gas stored in the compressed gas tank 30 can be introduced into the variable buoyancy body 20 through the first flow line 31. [ At the same time, the ballast water contained in the variable buoyant body 20 can be discharged to the outside through the through hole 20a. Therefore, the buoyant force of the variable buoyant body 20 gradually increases, and the buoyant body 10 and the variable buoyant body 20 can rise and float on the sea surface. As the submersible mooring device 1 floats on the sea surface, the fastening with the offshore structure 200 to be moored can be facilitated.

7 to 9 are views showing an example of using a submersible mooring device according to an embodiment of the present invention.

The submerging mooring device 1 is for mooring various offshore structures 200 at one point in the sea and is constructed by a mooring line 40 connected to an anchor member 41 fixed to the sea floor S, Lt; / RTI > 7, the submergible mooring apparatus 1 is located below the sea surface and can prevent the drift ice I and the submerging mooring apparatus 1 from colliding with each other, Exposure may increase device life.

8, the submersible mooring device 1 communicates with the outside under the sea level, and the offshore structure 200 transmits and receives positional information to and from the communication unit 60, 1). ≪ / RTI > At this time, the offshore structure 200 operates a dynamic positioning system (DPS) for controlling the position of the offshore structure 200 by using artificial satellites, Lt; / RTI >

When the offshore structure 200 is positioned above the submersible mooring device 1, the submerging mooring device 1 can be raised by increasing buoyancy as shown in Fig. When the submergible mooring apparatus 1 ascends and is accommodated in the turret room 200a, the submergible mooring system 100 can operate to connect the submerged mooring apparatus 1 and the offshore structure 200. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: Submersible mooring device 10: Buoyant body
10a: accommodation space 11: hatch
20: variable buoyant body 20a: through hole
21: Support part 22: Chain guide part
30: Compressed gas tank 31: First flow line
31a: first valve 32: second flow line
32a: second valve 33: gas filling tube
33a: Control valve 40: Mooring line
41: anchor member 50:
60: communication unit 70: connector
80: Nochibu 100: Submersible mooring system
110: bearing part 120: retaining ring
130: Stopper 140: Actuator
150: Guide wheel 150a:
160: watertight member 200: offshore structure
200a: turret room 210: floating line
220: auxiliary connector 230: swivel tube
I: Drift ice R: Riser
S: Sea bottom surface

Claims (12)

A buoyant force generating buoyancy;
A variable buoyant body coupled to the buoyant body and injecting ballast water or gas into the buoyant body to adjust buoyancy;
A compressed gas tank for storing compressed gas therein and injecting gas into the variable buoyant body;
A communication unit for communicating with the outside;
A controller for receiving the control signal from the communication unit and controlling the compressed gas tank to adjust the buoyancy of the variable buoyant body; And
And a mooring line connecting one of the buoyant body and the variable buoyant body to the bottom of the sea. The method according to claim 1,
Wherein the buoyant body includes an accommodation space which is hermetically sealed to maintain buoyancy and the compressed gas tank is accommodated in the accommodation space. 3. The method of claim 2,
Wherein the compressed gas tank further comprises a gas fill tube for filling a compressed gas therein, the gas fill tube being connected to the outside through the hatch. 3. The method of claim 2,
Wherein the buoyant body is located above the variable buoyant body, and the buoyant body and the variable buoyant body form a cone shape. 3. The method of claim 2,
Further comprising at least one connecting pipe inserted vertically through the variable buoyant body, one end of which is located in the receiving space and the other end of which is located in the water. The method according to claim 1,
A first valve connected to the compressed gas tank and the variable buoyant body to open / close a first flow line for injecting gas stored in the compressed gas tank into the variable buoyant body, the first valve being controlled by the controller; And
And a second valve that opens and closes a second flow line for discharging the gas contained in the variable buoyant body to the outside and is controlled by the control unit. The method according to claim 1,
Further comprising a notch portion formed by inserting one side of the buoyant body or the variable buoyant body inward,
Wherein a plurality of notches are symmetrically disposed about the center of the buoyant body or the variable buoyant body. 8. The method of claim 7,
Wherein in the cross-sectional shape of the buoyant body or the variable buoyant body cut through the notch portion, the notch portion forms a polygonal shape. A submerged mooring system comprising a submergible mooring device and an offshore structure moored by the submerged mooring device,
The submerged mooring device includes:
A buoyant force generating buoyancy;
A variable buoyant body coupled to the buoyant body and injecting ballast water or gas into the buoyant body to adjust buoyancy;
A compressed gas tank for storing compressed gas therein and injecting gas into the variable buoyant body;
A mooring line connecting one of the buoyant body and the variable buoyant body to the bottom of the sea floor; And
And a plurality of notches formed symmetrically with respect to the center of the buoyant body or the variable buoyant body, wherein the buoyant body or the variable buoyant body is formed by one side of the buoyant body or the variable buoyant body,
The above-
A bearing portion disposed outside the submerged mooring device;
A stationary ring mounted on an upper end of the bearing portion and rotating about the submergible mooring device along the bearing; And
And a plurality of stoppers mounted on an upper end of the stationary ring and slidingly moved toward the submergible mooring device and inserted and fixed in the notch portion. 10. The method of claim 9,
Further comprising a hydraulic, pneumatic or electromechanical actuator fixed to the stationary ring to slide and move the stopper. 10. The method of claim 9,
Wherein in the cross-sectional shape of the buoyant body or the variable buoyant body cut through the notch portion, the notch portion forms a polygonal shape. 10. The method of claim 9,
Further comprising a plurality of guide wheels mounted on the offshore structure and rotating in contact with an outer circumferential surface of the submergible mooring device.
KR1020150000874A 2015-01-05 2015-01-05 Submersible mooring apparatus and submersible mooring system having the same KR20160084243A (en)

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