KR20150146005A - Vessel - Google Patents

Abstract

A vessel is disclosed. According to one embodiment of the present invention, the vessel has a hull having a moon pool. The vessel comprises: a recess provided by steps formed inside the moon pool; and a recess driving unit coupled to be relatively moved with respect to the recess to reduce resistance.

Description

Ship {VESSEL}

The present invention relates to a ship, and more particularly, to a ship in which a height of a recess movable unit disposed in a door frame is varied to change a ship's line speed and draft according to a driving condition, It is about ships that can.

In general, an offshore structure is a structure that is installed on the sea or under the sea. It is classified into fixed type, semi-submerged type, floating type according to depth, and mainly used for marine work such as exploration and extraction of energy source such as oil or natural gas .

Here, the offshore structures are equipped with drilling equipment, etc., and are used to develop underwater oil fields.

On the other hand, due to the increase of oil usage due to industrialization, development of marginal field or deep-sea oil field which is not economically feasible has become economical. With the development of submarine mining technology, And a drill rig equipped with the drill rig has been developed and used.

Here, the drill ship includes various types of ships. For example, it is possible to use a tug boat that can be sailed by another tugboat, and a submarine drilling rig a so-called drill ship has been developed for use in subsea drilling, which is constructed in the same form as a general ship so that it can be equipped with a rig ship, a fixed platform and advanced drilling equipment and can navigate by its own power

Here, a moonpool for lowering the drilling pipe or the like to the sea floor may be formed at the center of the drill ship.

This type of portal is indispensable in terms of the use of the ship, but it is very disadvantageous in terms of vessel anchorage, navigation stability and navigation performance.

That is, due to the sloshing phenomenon caused by the relative flow of seawater flowing into the interior of the door and the sea water outside the hull, there is a problem that the resistance increases, the speed decreases, the required horsepower increases, the fuel consumption increases, Damage and so on.

In order to solve such a problem, in the conventional case, a recess caused by a step is formed in the interior of the interior of the interior so as to reduce the sloshing phenomenon in the interior.

However, in the case of a ship, the line speed and the draft vary depending on the operating conditions. If the height of the recess is fixed as in the conventional case, the resistance may increase when the line speed and the draft vary in various operating conditions there was.

Korean Patent Publication No. 10-2011-0027404 (Published Date: March 16, 2011)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a recess moving unit, which is capable of varying the height of a recess movable unit disposed in a door frame, And to provide a ship capable of reducing the cost by improving the energy efficiency according to the operation of the ship.

According to an aspect of the present invention, there is provided a ship including a hull having a Moonpool, the ship comprising: a recess provided by a step formed in the interior of the door frame; And a recess movable unit which is movably coupled to the recess, for resistance reduction, may be provided.

Further, the recess movable unit may include: a recess movable body coupled to the recess so as to be movable up and down; And a recess movable body guide coupled to the recess movable body and guiding movement of the recess movable body.

In addition, the recess movable body may include: a water receiving tank provided so as to allow water to flow in and out; And a height adjusting plate coupled to a side surface of the water receiving tank.

The water storage tank may include a water storage room in which water is introduced and stored; And a pump arrangement chamber coupled to the water storage chamber, wherein a pump operated for the flow of water is disposed.

Further, the recess movable body may be provided so as to be raised by a buoyancy action by the fluid flowing into the recess.

The apparatus may further include a vertical driving force providing unit coupled to the recess movable body to provide a driving force to move the recess movable body upward and downward.

The guide plate may further include a guide hollow provided in the recess, and the height adjusting plate may be inserted into the guide hollow to move up and down along the guide hollow.

Also, the recess movable body guide may include: at least one LM guide rail coupled to the hull within the interior of the door frame; And an LM guide moving unit mounted on the LM guide rail and moving along the LM guide rail, wherein the LM guide moving unit is coupled to the recess movable body.

The apparatus may further include a recess stopper stopper coupled to at least one of the LM guide rail and the hull so as to stop the vertical movement of the recess movable body.

The embodiments of the present invention are provided such that the height of the recess movable unit disposed in the door frame is varied to change the ship's line speed and draft according to the operating conditions to reduce the resistance inside the door frame, It is possible to reduce the cost by improving the energy efficiency.

1 is a schematic side cross-sectional view of a ship in accordance with an embodiment of the present invention.
2 is a schematic perspective view of the structure of a door in a ship according to an embodiment of the present invention.
Figs. 3 (a) to 3 (c) are graphs of experimental results on the spectrum of the wave amplitude (wave amplitude) according to the height of the recess in a general ship.
Fig. 4 is a chart showing the degree of reduction of effective horsepower according to the height of a recess in a general ship. Fig.
5 and 6 are side cross-sectional views showing operation of the recess movable unit in a ship according to an embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

The terms " one side " and " other side " used in this specification may mean a specified side, or do not mean a specified side, but any side of a plurality of sides may be referred to as one side, And the other side is referred to as the other side.

Further, the term " bonding " or " connection ", as used herein, refers not only to a case where one member and another member are directly bonded or connected directly, but also when one member is indirectly bonded to another member through a joint member , Or indirectly connected.

In the meantime, the vessel 100 used in the present invention includes all vessels 100 that carry a person or a cargo with a self-propelled ability such as a commercial vessel, a warship, a fishing vessel, a carrier vessel, a drill ship, a cruise vessel, , Floating Production Storage Offloading (FPSO), and Floating Storage Unit (FSU), which can store and unload cargoes.

A ship 100 according to an embodiment of the present invention is a ship 100 including a hull 110 having a moonpool 120. The ship 100 comprises a ship 100, And a recess movable unit 300 which is relatively movably coupled to the recess 200 for resistance reduction.

1 is a schematic side cross-sectional view of a ship 100 according to an embodiment of the present invention.

1, the hull 110 can be divided into a forward portion, a central parallel portion, and a stern portion along the longitudinal direction, and the hull 110 can be loaded with cargo. Further, .

The drum 120 may be formed on the hull 110 so that a drill pipe (not shown) drilling oil or gas existing under the seabed may be moved up and down to be drilled.

The drapery 120 may be located midway between the bow and the stern of the drill ship and the derrick may be installed at the upper portion of the drainer 120 so that the drainer 120 may be installed using drilling equipment and drilling pipes The drilling operation can be performed in the space formed by the openings.

2 is a schematic perspective view illustrating the structure of the door frame 120 in the ship 100 according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the recess 200 is provided by a step formed inside the interior of the door 120. That is, a step is formed at the rear of the door frame 120 to reduce the sloshing phenomenon in which the fluid flow increases in the door frame 120, and a predetermined space is provided by such a step.

Here, the recess 200 may provide a space for installing equipment for drilling, and may also include a drilling water storage tank (not shown) provided to store drilling water through a drilling operation.

The recess 200 protrudes from the rear of the door frame 120 toward the bow side, and the flow of the fluid flowing into the door frame 120 can be stabilized by this shape.

That is, since the recess 200 is formed in the interior of the interior space 120, the wave height of the interior of the interior space 120 is reduced, so that the phenomenon of fluid leaking is reduced, The sloshing phenomenon can be reduced.

Here, if the height of the recess 200 is changed on the basis of the draft of the ship corresponding to the draft of the ship 100, the resistance reduction effect in the interior space 120 is also changed. .

Figs. 3 (a) to 3 (c) are graphs of experimental results on the spectrum of the wave amplitude (wave amplitude) according to the height of the recess in a general ship.

3 (a) is a spectrum of the wave amplitude when a ship having a recess having a height of 6.45 m moves at a speed of 12 knots, and Fig. 3 (b) is a spectrum of a vessel having a recess having a height of 7.3 m Is the spectrum of the wave amplitude when moving at a speed of 12 knots, and Fig. 3 (c) is the spectrum of the wave amplitude when the ship having a recess of 8.15 m height moves at a speed of 12 knots .

3 (a) to 3 (c), it can be seen that the wave amplitude varies with the height of the recess. It can be seen that the wave amplitude decreases as the height of the recess increases.

4 is a chart showing the degree of reduction of the effective horsepower according to the height of the recess in a general ship. In FIG. 4, EHP is an abbreviation of Effective Horse Power and means effective horsepower.

Here, the height of the reference recess is 7.3 m, and in the case of a ship having a recess having a height of 7.3 m, if the reduction degree of the effective horsepower is 0%, the reduction of the effective horsepower in the ship having the recess of 6.45 m is -1 %, And the reduction in effective horsepower is 9% for ships with 8.15 m high recesses.

That is, as the height of the recess increases, the degree of saving of the effective horsepower increases, so that the energy efficiency can be improved. However, it can be confirmed from the experimental results that the energy efficiency becomes worse if the height of the recess decreases.

This result is an experimental result in a state where the reference draft is fixed, that is, the draft value is not changed. When the draft value changes, the height of the recess must be changed. Therefore, The height of the seth must be variable so that the resistance of the fluid can be reduced.

That is, if the height of the recess is fixed even if the line speed and the draft vary according to the operating conditions, the resistance may be increased depending on the case. In the case of the ship 100 , The height is adjusted through the movement of the recess actuating unit 300 according to the operating conditions, so that it is possible to obtain a common or similar effect that the height of the recess 200 is controlled. Hereinafter, Will be described in detail with reference to FIG.

5 and 6 are side cross-sectional views illustrating operation of the recess movable unit 300 in the ship 100 according to an embodiment of the present invention.

2, 5 and 6, the recess movable unit 300 is movably coupled to the recess 200 for reducing resistance.

That is, the recess moving unit 300 is moved up and down so as to minimize the resistance according to the operating conditions, and functions and functions similar to or similar to the adjustment of the height of the recess 200.

2, 5, and 6, the recess movable unit 300 may include a recess movable body 310 and a recess movable body guide 320. As shown in FIG.

The recess movable body 310 can be coupled to the recess 200 in a vertically movable manner. That is, the recess movable body 310 is moved up and down according to the operation draft applied when the ship 100 is moving for sailing and the work draft applied for various operations of the ship 100, At a predetermined height.

In this case, the vessel 100 is set to have a small draft value that can be advantageous for the speed because it is affected by the speed of the vessel 100, and the recessed operation main body 310 has a reduced resistance at a relatively small draft value Lt; / RTI >

Since the vessel 100 is relatively less influenced by the speed than when the vessel 100 is moved, the vessel 100 is set to have a larger draft value when the vessel 100 is moved. The recessed operation body 310 has a relatively large draft Value is adjusted so that the resistance can be reduced.

Referring to FIGS. 5 and 6, the recess movable body 310 may include a water receiving tank 311 and a height adjusting plate 319.

The water storage tank 311 is provided to allow water to flow in and out. That is, water can be introduced into the water storage tank 311 through the inflow pipe 315 connected to one side of the water storage tank 311, The water can be drained to the outside of the water receiving tank 311 through the opening 317.

Here, the water flowing into the water storage tank 311 can be discharged to the outside of the water storage tank 311 by the pump 314.

5 and 6, the water storage tank 311 includes a water storage room 312 in which water is introduced and stored, a pump 314 coupled to the water storage room 312 and operated for water inflow and outflow, And a pump disposition room 313 in which a pump is disposed.

The pump 313 is connected to the side of the water storage room 312 and the pump 314 is connected to the pump arrangement room 313. The pump 313 is connected to the water storage room 312, Respectively. The connection pipe 316 connects the water storage room 312 and the pump 314 and the outlet pipe 317 is connected to the pump arrangement room 313.

Here, when water flows into the water storage room 312 through the inflow pipe 315, the water storage tank 311 moves downward due to its own weight, and the height of the recess 200 is lowered Or have similar effects.

When the water stored in the water storage room 312 flows out of the water storage room 312 through the connection pipe 316 and the outflow pipe 317 by the operation of the pump 314, The buoyancy caused by the fluid flowing into the bottom side of the water storage tank 311 and the buoyancy due to the seawater acts to cause the recessed operation body 310 including the water storage tank 311 and the height adjustment plate 319 to move upward So that it is possible to have a common or similar effect that the height of the recess 200 is increased.

On the other hand, the recess movable body 310 may be raised by the buoyancy force and may be provided so that water flows in and descends by its own weight, but it may be provided so as to be movable up and down by a vertical drive force providing unit (not shown).

That is, a vertical drive force providing unit (not shown) may be coupled to the recess movable body 310 to provide a driving force for the vertical movement of the recess movable body 310. Here, the up-and-down driving force providing unit (not shown) may be provided by a hydraulic cylinder or may include various motors.

Referring to FIGS. 2, 5 and 6, the height adjusting plate 319 is coupled to the side surface of the water receiving tank 311 and is provided to stabilize the flow of the fluid introduced into the door 120.

As described above, since the recess 200 is formed in the interior of the door frame 120, the sloshing phenomenon in the interior of the door frame 120 can be reduced, and the height of the recess 200 The degree of sloshing reduction varies.

That is, the height regulating plate 319 is coupled to the side surface of the water receiving tank 311 and moves in the vertical direction to perform a function similar to or similar to that of the height of the recess 200, Thereby reducing swelling.

In addition, if a fluid such as seawater is drawn into the interior of the door 120 and a sloshing phenomenon occurs, the fluid may overflow to the upper deck due to an overflow phenomenon. In this case, And damage to the work equipment may occur.

Here, the height adjusting plate 319 is coupled to the side surface of the water receiving tank 311 to prevent the fluid from overflowing to the upper deck when the overflow occurs.

For this, a guide hollow 210 may be formed in the recess 200, wherein the height adjustment plate 319 is inserted into the guide hollow 210 and moves up and down along the guide hollow 210 .

The guide hollow 210 may be formed in a shape corresponding to the shape of the height adjusting plate 319. A height adjusting plate 319 may be provided inside the guide hollow 210 for smooth movement of the height adjusting plate 319, A height adjusting plate guide (not shown) may be provided.

2, 5, and 6, the recess movable body guide 320 is coupled to the recess movable body 310 and can be provided to guide the movement of the recess movable body 310. As shown in FIG.

Here, the recessed movable body guide 320 may be provided with various types of guides, for example, an LM guide for guiding linear motion.

When the recess movable body guide 320 is provided as an LM guide, the recess movable body guide 320 may include an LM guide rail 321 and an LM guide moving unit 322.

 The LM guide rail 321 is provided to be coupled to the hull 110 within the door frame 120. Here, the LM guide rail 321 may be provided in various shapes, and various methods may be applied. In addition, the LM guide rail 321 may be provided in one or more.

The LM guide moving unit 322 is mounted on the LM guide rail 321 and moves linearly along the LM guide rail 321.

The LM guide moving unit 322 is coupled to the recess movable body 310. When the LM guide moving unit 322 moves linearly along the LM guide rail 321, The recessed movable main body 310 is moved in a straight line interlocking with the movement of the LM guide moving unit 322.

2, 5 and 6, the recess movable stopper stopper 330 can be coupled to the LM guide rail 321 so as to stop the vertical movement of the recess movable body 310.

That is, when the recess movable body 310 moves up and down, it must stop at a predetermined position. For this purpose, the recess movable stop body 330 is positioned at a position corresponding to the stop position of the recess movable body 310 And can be coupled to the LM guide rail 321 at a predetermined position.

Alternatively, the recess movable main body stopper 330 may be coupled to the hull 110 inside the interior space 120 at a position close to the LM guide rail 321.

Meanwhile, the recess movable stopper stopper 330 may be formed in a height adjusting plate guide (not shown) provided inside the guide hollow 210.

The height of the recess movable unit 300 disposed in the door frame 120 with respect to changes in the ship speed and draft of the ship 100 according to the operating conditions in the ship 100 according to the embodiment of the present invention Thereby reducing the resistance in the interior of the door frame 120, thereby improving the energy efficiency associated with the operation of the ship 100 and reducing the cost.

When the recess 200 is formed in the door frame 120, the wave height of the fluid inside the door frame 120 is reduced to reduce the sloshing phenomenon in the door frame 120, Depending on the height of the seth 200.

The height of the recess 200 for reducing the resistance generated inside the door frame 120 may vary depending on the ship's speed or the draft of the ship 100. The height of the recess 200 may vary depending on the operating conditions, The resistance of the fluid is minimized under the corresponding operating conditions, so that the energy efficiency is improved.

To this end, in the case of the ship 100 according to an embodiment of the present invention, the recess movable unit 300 is installed in the door frame 120 to obtain a similar or similar effect to that of the height of the recess 200 .

That is, when the ship 100 is in operation or moving, the draft changes, so that the recess actuating unit 300 moves up and down correspondingly.

To this end, the recess actuating unit 300 includes a recess movable body 310 provided with a water receiving tank 311 and a height adjusting plate 319, and a recess for guiding the movement of the recess movable body 310 The water storage tank 311 includes a water storage room 312 through which water can flow and a pump arrangement room 313 in which the pump 314 is disposed.

When the water flows into the water storage room 312, the main body 310 descends along the recessed movable body guide 320 by its own weight. By the operation of the pump 314, The recessed movable body 310 is lifted along the recessed movable body guide 320 by buoyancy by fluid action of the seawater or the like drawn into the recess 200. [

Herein, since the height of the recess movable unit 300 disposed in the door frame 120 varies with the variation of the ship speed and the draft of the ship 100 according to the operating conditions, the resistance inside the door frame 120 is reduced Accordingly, it is possible to reduce the cost by improving the energy efficiency according to the operation of the ship 100.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

100: ship 110: hull
120: a frame 200: a recess
210: guide hollow 300: recess movable unit
310: recessed operation main body 311: water receiving tank
312: Water storage room 313: Pump arrangement room
314: Pump 315: Inflow pipe
316: connecting pipe 317: outlet pipe
319: height adjustment plate 320: recess operation body guide
321: LM guide rail 322: LM guide moving unit
330: Stop operation Stopper body

Claims (9)

A ship containing a hull equipped with a Moonpool,
A recess provided by a step formed in the interior of the door frame; And
And a recess movable unit coupled to the recess for resistance reduction. The method according to claim 1,
The recess movable unit includes:
A recess movable body coupled to the recess so as to be movable up and down; And
And a recessed movable body guide coupled to the recessed movable body for guiding movement of the recessed movable body. 3. The method of claim 2,
The recess movable body includes:
A water receiving tank provided to allow water to flow in and out; And
And a height adjustment plate coupled to a side of the water receiving tank. The method of claim 3,
The water-
A water storage room in which water is introduced and stored; And
And a pump arrangement chamber coupled to the water storage chamber, the pump arrangement chamber being arranged to operate for the inflow and outflow of water. 3. The method of claim 2,
Wherein the recess movable body is provided so as to be raised by buoyancy action by the fluid flowing into the recess. 3. The method of claim 2,
And a vertical drive force providing unit coupled to the recess movable body to provide a driving force such that the recess movable body can move up and down. The method of claim 3,
Further comprising a guide hollow provided in the recess,
Wherein the height adjustment plate is inserted into the guide hollow and is configured to move up and down along the guide hollow. 3. The method of claim 2,
The recessed movable body guide
At least one LM guide rail coupled to the hull within the interior of the door frame; And
And a LM guide moving unit mounted on the LM guide rail and moving along the LM guide rail, wherein the LM guide unit is coupled to the LM guide rail. 9. The method of claim 8,
Further comprising a recess stopper stopper coupled to at least one of the LM guide rail and the hull so as to stop the vertical movement of the recess movable body.

Images