KR101652422B1

KR101652422B1 - Floating structure

Info

Publication number: KR101652422B1
Application number: KR1020140144030A
Authority: KR
Inventors: 박주신; 구정본; 전준환; 하영수
Original assignee: 삼성중공업 주식회사
Priority date: 2014-10-23
Filing date: 2014-10-23
Publication date: 2016-08-30
Also published as: KR20160047751A

Abstract

The present invention relates to a floating structure.
According to an aspect of the present invention, there is provided an apparatus comprising: a body capable of floating in water; A leg penetrating the main body in the vertical direction and having a spud can that can penetrate the seabed at the lower end; A leg guide portion for supporting the leg and relatively moving the main body and the leg in a vertical direction; And a filing unit that is vertically movable along the leg and penetrates into the seabed prior to the spandan can to improve the penetration of the spandan can. The filing unit is configured to move the lower end of the span can A pile portion which can be disposed below the lower end of the spandan can and penetrates the seabed before the spandan can; And a pressurizing portion that is equipped with at least one of the above-mentioned file portions and presses the pile portion toward the seabed.

Description

{FLOATING STRUCTURE}

The present invention relates to a floating structure.

Floating structures such as Jack-up Platform, Mobile Offshore Drilling Unit (MODU), Wind Turbine Installation Vessel (WTIV), etc., are in Transit Mode and Jack-up Mode Can be operated.

Specifically, the floating structure moves to the drilling point or the installation point for the operation such as drilling or the installation of the marine facility. In the navigation mode, the legs of the floating structure can be moved upwardly of the body to reduce resistance by seawater.

If the floating structure reaches a certain point, the floating structure can be switched to the jack-up mode to perform drilling or installation work. In jack-up mode, the floating structure is lowered into the seabed and then lifted along the leg so that the body is spaced a distance from the sea level. That is, the legs and the main body can be supported by the seabed so that the lower end of the legs penetrates the seabed. Then, when the work is completed, the floating structure can move in the reverse order of the above procedure and move to the next destination point.

On the other hand, a spudcan can be provided on the legs of the floating structure described above. The sprue can is provided at the bottom of the legs and can easily penetrate the legs into the seabed in the jack-up mode and improve gripping power after penetration.

However, depending on the characteristics of the geology of the seabed, the depth and gripping force of the spud can penetrate the seabed may be different, and thus the reliability of the bearing capacity of the legs can not be secured.

If the spud can is not stably fixed to the seabed, the legs are not rigidly supported and the floating structure may be overturned, which may result in injury to the crew.

Korean Patent Publication No. 10-2014-0008591

Embodiments of the present invention seek to provide a floating structure in which the gripping force of the sprung can is improved.

According to an aspect of the present invention, there is provided an apparatus comprising: a body capable of floating in water; A leg penetrating the main body in the vertical direction and having a spud can that can penetrate the seabed at the lower end; A leg guide portion for supporting the leg and relatively moving the main body and the leg in a vertical direction; And a filing unit that is vertically movable along the leg and penetrates into the seabed prior to the spandan can to improve the penetration of the spandan can, and the filing unit has a lower end, A pile portion which can be disposed below the lower end of the spandan can and penetrates the seabed before the spandan can; And a pressurizing portion that is equipped with at least one of the above-mentioned file portions and presses the pile portion toward the seabed.

In addition, the filling unit may be provided with a floating structure which is provided in the pressing portion and further includes a transfer portion for vertically transferring the pressing portion along the leg.

In addition, the feed portion may be provided with a floating structure including a feed gear that can be engaged with the rack gear of the leg and guide the up and down movement of the pressing portion.

The conveying unit may further include a driving member for vertically conveying the pressing unit, and the driving member may include a driving motor for driving the conveying gear, or a floating structure that is a winch connected to the pressing member by a wire .

When the density of the pressing portion is greater than the density of the pressing portion due to the density control of the density adjusting portion, the pressing portion freely falls downward, and the pressing portion And a floating structure in which the pressing portion rises upward when the density of the negative portion is smaller than the seawater.

The density adjusting unit may include a density adjusting tank provided in the pressing unit and capable of introducing the seawater into the density adjusting tank. And a gas injector for selectively injecting a gas into the density adjusting tank. When the density adjusting tank is filled with the seawater, the pressing portion falls down in a downward direction, and the gas injector moves the gas to the density adjusting tank A floating structure in which the pressurizing portion rises upward can be provided.

Embodiments of the present invention can provide a floating structure in which the gripping force of the sprung can is improved.

1 is a schematic view of a floating structure according to an aspect of the present invention.
Fig. 2 is a view showing a state in which a piling unit is provided in the leg of Fig. 1;
3 is a plan view of Fig.
Fig. 4 is a conceptual view showing a structure in which the filing unit of Fig. 1 is vertically moved up and down with respect to the leg.
5 is a conceptual view showing a state in which a file portion of the filing unit of FIG. 4 penetrates into a seabed.
6 is a conceptual view showing a state in which the spud can of FIG. 5 penetrates into the sea bed.
FIG. 7 is a view showing a density adjusting unit provided in the filing unit of FIG. 3. FIG.

Hereinafter, specific embodiments for implementing the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the subject matter of the present invention.

Fig. 1 is a view schematically showing a floating structure 1 according to one aspect of the present invention. Fig. 2 is a view showing a state in which a filing unit 100 is provided in the leg 20 of Fig. 1, Fig. 4 is a conceptual view showing a structure in which the filing unit 100 of Fig. 1 is vertically moved up and down with respect to the leg 20. Fig.

1 to 4, a floating structure 1 according to one aspect of the present invention includes a main body 10 capable of floating in water, a leg 20 extending vertically through the main body 10, And a leg guide portion 30 for relatively moving the leg 20 and the main body 10 in the vertical direction and supporting the leg 20.

In addition, the main body 10 may include a crane 40 for carrying a blade, a nacelle, a tower and the like to install an offshore wind power generator, or a derrick for installing a pipe for drilling the seabed. With this configuration, the floating structure 1 can install a wind turbine generator or selectively perform a drilling operation. In this embodiment, a crane 40 for installing an offshore wind power generator is provided as an example.

The body 10 may have various types of planar structures that can be suspended and may include leg wells 50. The leg well 50 may be understood as a concept including a space through which the leg 20 is inserted in the leg guide portion 30. [

The leg 20 is installed to penetrate the leg well 50 of the main body 10 in the up and down direction and is moved downwardly of the main body 10 and is fixed to the submarine B through the sea surface S, Lt; / RTI > The legs 20 may be formed in various shapes such as a square truss structure, a triangular truss structure, and the like. In the present embodiment, the legs 20 are formed in a triangular truss structure.

A cord 22 that serves as a pillar when the leg 20 is formed in a triangular truss structure and a cord 22 that is coupled to the cord 22 so as to protrude in pairs on both sides of the cord 22, And a rack gear 21 extending along the rack gear 21. And the legs 20 may include a brace 23 connecting the plurality of cords 22. Accordingly, the cord 22 can form a triangle vertex constituted by the brace 23.

The leg guide portion 30 is provided at a position corresponding to the leg 20 in the leg well 50 so that the leg 20 can pass therethrough and the leg 20 and the body 10 relatively move in the vertical direction To support the legs 20. Specifically, the leg guide unit 30 includes a driving device such as a motor and moves the legs 20 up and down with respect to the main body 10 by the operation of the driving device, 20 in the vertical direction. For example, a pinion gear (not shown) and a motor are provided on the leg guide portion 30, and a rack gear 21 is formed on the leg portion 20 so that the pinion gear and the rack gear 21 interlock with each other, 20 and the main body 10 in the up and down direction.

The vertical movement of the leg 20 and the main body 10 in the present embodiment means that the leg 20 moves in the vertical direction with respect to the main body 10 and that the main body 10 moves in the vertical direction relative to the leg 20 It can be understood as a concept including both the upward and downward movement.

Although the leg guide portion 30 is protruded upward from the main body 10 in the present embodiment, the leg guide portion 30 may be embedded in the main body 10.

The spud can 40 is mounted on the lower end of the leg 20 of the floating structure 1 having the structure described above and the spud can 40 penetrates into the seabed B and can be stuck in the seabed B. The spud can 40 may have a shape that is easy to penetrate into the seabed B. The spud can 40 may be formed such that the upper body 41 and the lower body 42 are formed in a cone shape, Portions may be in the form of facing each other. A pile mounting plate 43 may be connected between the upper body 41 and the lower body 42.

The file attaching plate 43 may have a flat plate shape and may have a width larger than that of the upper body 41 and the lower body 42 and have a shape protruding outward from the upper body 41 and the lower body 42 . A plurality of insertion holes 45 passing through the pile mounting plate 43 in the up and down direction may be formed along the circumference of the pile mounting plate 43 in the protruding portion of the pile mounting plate 43. In addition, the peg 120 of the filing unit 100 can be mounted in the insertion hole 45.

However, the spud dogs 40 may have various forms other than the illustrated form, and a plurality of insertion holes 45 may be formed through the upper body 41 and the lower body 42 .

On the other hand, the filing unit 100 has a function of enhancing the penetration ability of the spud can 40, and is capable of penetrating the submarine B first than the sputter can 40 to reduce the density of the lipid constituting the submarine B . The filing unit 100 may include a pusher 110 and a pile 120 and a filing unit 100 may be provided to each leg 20.

The pressing portion 110 has a function of pressing the pile portion 120 toward the sea bed B, that is, downward, to infiltrate the pile portion 120 into the sea bed B, and is provided to the leg 20 .

The pressing portion 110 has a hollow shape in the center portion in the vertical direction, and the leg 20 can be inserted into the hollow central portion. That is, the pressing portion 110 may be mounted on the leg 20 in a manner to enclose the leg 20. The gear groove 112 may be formed on the surface of the pressing portion 110 facing the rack gear 21 of the leg 20 so as to correspond to the longitudinal direction of the leg 20. A gear 131 may be mounted on the gear groove 112.

A plurality of mounting holes 111 in which the peg 120 can be mounted can be formed in the pressing portion 110 in the vertical direction. The mounting hole 111 of the pressing portion 110, The inserting holes 45 of the inserting holes 45 may be arranged on the same line. Also, the pressurizing unit 110 may be made of a material having a density higher than that of seawater, for example, metal or the like, so as to be dropped downward in the seawater.

Although the pressing portion 110 is shown as an integral triangular ring shape surrounding the leg 20 in the present embodiment, the pressing portion 110 may have a separate shape and be mounted on the leg 20.

The filing unit 100 may further include a transfer unit for transferring the pressing unit 110 in the vertical direction along the legs 20. [ The conveying portion may include a conveying gear 131 for engaging with the rack gear 21 to guide the movement of the pressing portion 110 and a driving member for providing a driving force for conveying the pressing portion 110. [

The feeding gear 131 may be a pinion gear that can be engaged with the rack gear 21 and the driving member is connected to the pressing portion 110 (not shown) by a driving motor (not shown) And a winch connected to the terminal.

When the driving member is a driving motor, the driving motor can be connected to the feeding gear 131, and the feeding gear 131 can be rotated in both directions according to driving of the driving motor. The feed gear 131 can be engaged with the rack gear 21 by rotation, so that the pressing portion 110 can be moved up and down. Further, when the driving member is a winch, the pressing portion 110 can be moved up and down according to the length of the wire 135 drawn out from the winch.

In this embodiment, the feed gear 131 is shown as being provided with three pairs in total so that it can be engaged with the respective rack gears 21, but the number of the feed gears 131 can be changed.

On the other hand, the pile portion 120 can penetrate the seabed B before the penetration of the spudded can 40 and reduce the density of the lipid constituting the seabed B layer.

The pile portion 120 may have a rod or rod shape having a length capable of penetrating the pressing portion 110 in the up and down direction and may have a sharp bottom end portion penetrating the seabed B. [ A plurality of the pile portions 120 can be vertically inserted into the mounting holes 111 of the pressing portion 110 and can be kept fixed on the mounting holes 111. [ The head 121 of the file unit 120 may be larger than the diameter of the mounting hole 111 and the release arm 125 may be mounted on the lower side of the file unit 120 inserted into the mounting hole 111 So that the pile portion 120 can be prevented from being detached from the mounting hole 111.

The lower end portion of the pile portion 120 is disposed below the lower end portion of the spud can 40 so that the pile portion 120 first reaches the seabed B before the spud can 40 reaches the seabed B .

Hereinafter, the operation and effect of the floating structure 1 according to one aspect of the present invention will be described.

5 is a conceptual view showing a state in which the pile portion 120 of the filing unit 100 of Fig. 4 penetrates into the seabed B. Fig. 6 is a view showing a state where the spud can 40 of Fig. 5 penetrates into the seabed B FIG.

The floating structure 1 can be moved to the navigation mode to a position where an offshore wind power generator is installed or a drilling operation is desired. After the floating structure 1 has moved to the destination position, it can be switched to the jack-up mode.

4 to 6, the legs 20 can be moved downwardly of the main body 10 by means of gravity and the driving device of the leg 20 guide unit 30, wherein the filing unit 100 To the lower end of the leg (20). Specifically, when the conveying portion includes the winch 135 and the wire 135, the density of the pressing portion 110 is larger than the density of the seawater, so that the wire 135 is pulled out from the winch, (Free fall). At this time, the feed gear 131 may only have a function of guiding the movement of the pressing portion 110. [

When the conveying unit includes a driving motor, the conveying gear 131 is rotated by driving the driving motor, and the pressing unit 110 can be conveyed downward by the rotation of the conveying gear 131. At this time, the density of the pressing portion 110 may be larger or smaller than the sea water.

When the pressing portion 110 moves downward, the pile portion 120 attached to the pressing portion 110 can also move downward and penetrate into the sea bed B. At this time, the pile portion 120 can penetrate into the seabed B through the insertion hole 45 of the spud can 40, and the movement of the pressing portion 110 is guided by the feed gear 131 The file portion 120 can be penetrated at the correct point.

Since the pile portion 120 is pressed downward by the pressing portion 110, penetration into the sea bed B can be facilitated and the density of the lipids constituting the sea bed B can be reduced.

When the penetration of the pile portion 120 is completed, the spud can 40 provided at the lower end of the leg 20 can penetrate into the sea bed B. Since the seabed B is pierced by the pile portion 120, the spud can 40 can easily penetrate into the seabed B. Fig. At this time, the lower body 42 of the spud can 40 has a cone shape, so that penetration into the seabed B can be made easier.

Since the pile portion 120 can be penetrated into the seabed B while penetrating the spud can 40, the pressing force provided by the pressing portion 110 can be transmitted to the spud can 40, 40 can be further improved.

When the infiltration of the sprue can 40 is completed, the filing unit 100 can be transported upward by the transporting unit. Specifically, the driving motor and the feeding gear 131 are rotated in opposite directions, or the wire 135 is lifted by the winch, so that the filing unit 100 can be transported upward. Therefore, the filing unit 100 according to the present embodiment can be easily recovered to the main body 10.

Hereinafter, a floating structure according to another aspect of the present invention will be described with reference to FIG. However, the present embodiment differs from the above-described embodiments in that the density adjusting section 140 is added and the driving motor or winch is omitted. Therefore, differences will be mainly described, and the same portions will be described with reference to the description of the embodiment The code is abbreviated.

FIG. 7 is a schematic view showing a state in which the density adjusting unit 140 is provided in the filing unit 100 of FIG.

The density adjusting unit 140 has a function of adjusting the density of the pressing unit 110. The density adjusting unit 140 adjusts the density of the pressing unit 110 to be larger or smaller than the density of the seawater, It is possible to adjust the lifting mechanism 100 so as to freely fall downward or to raise (float) the filing unit 100 upward.

For example, the density adjusting unit 140 may include a density adjusting tank 141 and a gas injector 142.

The density adjusting tank 141 may be a space formed in the pressing portion 110 and the gas injector 142 may be a device capable of supplying gas into the density adjusting tank 141.

Seawater can be introduced into the density adjustment tank 141 by a pressure difference (water pressure), and seawater can be discharged from the density adjustment tank 141 due to gas injection of the gas injector 142. When the seawater is discharged from the density adjustment tank 141, the density adjustment tank 141 may be filled with gas. The density of the pressurizing portion 110 is relatively increased when the density adjusting tank 141 is filled with seawater. When the density adjusting tank 141 is filled with gas, the pressurizing portion 110 are relatively reduced.

The type and volume of the material constituting the pressing portion 110 are adjusted by the volume of the density adjusting tank 141 and the volume of the gas supplied to the density adjusting tank 141 so that the pressing portion 110 can freely fall and float on the seawater. It can be designed in advance according to the density.

The filing unit 100 according to the present embodiment can open the density adjustment tank 141 when the file unit 120 is to be infiltrated into the sea bed B, Can be introduced. By the inflow of seawater, the gas inside the density control tank 141 is replaced with seawater, so that the density of the pressurizing portion 110 can be larger than the seawater.

More specifically, when the density adjusting tank 141 mounted on the pressing portion 110 is filled with seawater, the density adjusting tank 141 does not affect the buoyancy acting on the pressing portion 110, Falls freely on the seawater due to the density of the pressing portion 110 itself. That is, the pressurizing portion 110 having a density higher than that of the seawater can sink below the sea surface S, so that the pile portion 120 can penetrate into the seabed B.

After the penetration of the spud can 40 is completed, the gas injector 142 injects gas into the density adjustment tank 141 to discharge the seawater to the outside of the density adjustment tank 141. The density adjusting tank 141 is filled with a gas and the pressing portion 110 can be moved (floated) upward by the buoyancy acting on the gas of the density adjusting tank 141. That is, the density of the pressing portion 110 on which the density adjusting tank 141 is mounted may be smaller than the density of the seawater, so that the pressing portion 110, that is, the filing unit 100, .

Therefore, the filing unit 100 of the floating structure 1 according to the present embodiment can be moved up and down without a separate feed drive device, and can easily separate the filing unit 100 from the sprung can 40 have.

It is to be understood that the embodiments described above are merely illustrative of some examples of the technical idea and the scope of the technical idea is not limited to the described embodiments, It will be understood that various changes, substitutions, and alterations may be made therein without departing from the spirit and scope of the invention.

1: Floating structure 10: Body
20: Leg 21: Rack gear
22: Code 30: Leg guide portion
50: leg well 100: piling unit
110: pressing portion 120:
130: transfer unit 140: density control unit

Claims

A body that can float in water;
A leg penetrating the main body in the vertical direction and having a spud can that can penetrate the seabed at the lower end;
A leg guide portion for supporting the leg and relatively moving the main body and the leg in a vertical direction; And
And a filing unit that is vertically movable along the leg and penetrates the seabed prior to the spud can to improve the penetration of the spud can,
Wherein the filing unit comprises:
A lower end portion of which can be disposed below the lower end portion of the spud can according to the upward and downward movement, and penetrates the seabed prior to the sped can;
At least one of the file units is equipped with a pressing unit for pressing the file unit toward the seabed; And
And a density adjusting unit for adjusting the density of the pressing unit,
Wherein the pressurizing portion is free to fall downward when the density of the pressurizing portion is larger than the seawater according to the density control of the density adjusting portion and the pressurizing portion rises upward when the density of the pressurizing portion is smaller than seawater.

The method according to claim 1,
Wherein the filing unit comprises:
And a transferring portion provided on the pressing portion and vertically transferring the pressing portion along the leg.

3. The method of claim 2,
The transfer unit
And a feed gear which can be engaged with the rack gear of the leg and guides the up and down movement of the pressing portion.

The method of claim 3,
The transfer unit
Further comprising a driving member for vertically conveying the pressing portion,
Wherein the driving member comprises:
A drive motor for driving the feed gear, or a winch connected to the pusher by a wire.

delete

The method according to claim 1,
The density-
A density control tank provided in the pressurization portion and capable of introducing the seawater; And
And a gas injector for selectively injecting gas into the density control tank,
Wherein when the density adjusting tank is filled with the seawater, the pressing portion freely falls downward, and when the gas injector injects the gas into the density adjusting tank, the pressing portion rises upward.