KR101185904B1 - Wave rise resistance reduction device in the moonpool of ship - Google Patents

Abstract

An object of the present invention is to provide a device for reducing the door pool resistance of the ship to prevent the seawater flows to the door pool of the ship to reduce the speed of movement of the ship.
The present invention is fastened rotatably to one side of the door pool of the ship, the first plate is formed with at least one first hole on one surface, and is disposed opposite to the first plate is fastened to be rotatable to the other side of the door pool And a second plate having at least one second hole formed on one surface thereof, and a fixing part formed on at least one of the first plate and the second plate to fix the first plate and the second plate. It provides a door pool resistance reduction device.

Description

Wave rise resistance reduction device in the moonpool of ship}

The present invention relates to an apparatus for reducing door pool resistance of a ship, and more particularly, to an apparatus for reducing door pool resistance of a ship that reduces seawater flow to a door pool of a ship when the ship moves.

With the rapid development of industries and industries internationally, the use of global resources such as petroleum is gradually increasing, so that stable production and supply of crude oil is becoming a very important problem at the global level. For this reason, the development of marginal or deep sea oil fields, which have been neglected in recent years due to lack of economic efficiency, has become economical, and thus, along with the development of seabed mining technology, drilling facilities suitable for the development of such oil fields have been developed. Equipped ship has been developed.

That is, a conventional rig ship or a fixed platform exclusively used for subsea drilling, which can be sailed only by another tugboat and is anchored to one point of the sea using a mooring device, in the conventional seabed drilling. Recently, so-called FPSOs (Floating Production Storage Offloading Vessels), which are equipped with advanced drilling equipment and can be sailed by their own power, have been developed and used for offshore drilling.

Depending on the working conditions that require frequent shifts in the development of small oil fields, these vessels have been designed to sail on their own power without tugboats, and thus are optimal for ships designed to sail on their own power. It must be dried to have performance.

In the center of the ship's hull, a large ship's Moon-Pool is formed to drive the drilling pipe down to the sea floor. The door pool of a ship is indispensable in terms of the use of the ship, but is very disadvantageous in terms of anchoring, sailing stability and sailing performance.

1: A is sectional drawing which shows the shape of the door pool A of a ship. FIG. 1B is a cross-sectional view illustrating a vortex generated in the door pool A of the ship and a sloshing phenomenon due to the vortex when the ship is sailed.

1A and 1B, the vessel 10 is driven through a vessel's Moonpool (part A in the figure), which is a space through the center of the hull to drive the device 11 for drilling operations. Drilling work is carried out, and the size of the ship's door pool A is approximately 20-30m in length and 10-15m in width, penetrating from the upper deck 20 to the base line 30 of the ship. Have

Referring to FIG. 1B, as the ship moves in the navigation direction SS of the ship 10 into the door pool A of the ship, the flow of sea water occurs inside the door pool A of the ship (see the arrow in part B). , This acts as a cause of lowering the ship speed of 1.0 ~ 1.5 knots when operating the vessel 10 due to the structure of the door pool A of the vessel as described above.

That is, due to the sloshing phenomenon caused by the vortex of the seawater introduced into the door pool A of the ship, the resistance increases, the speed decreases, the required horsepower increase, the fuel consumption increase, It may cause damage to the hull.

An object of the present invention is to provide a device for reducing the door pool resistance of the ship to prevent the seawater flows to the door pool of the ship to reduce the speed of movement of the ship.

The present invention is fastened rotatably to one side of the door pool of the ship, the first plate is formed with at least one first hole on one surface, and is disposed opposite to the first plate is fastened to be rotatable to the other side of the door pool And a second plate having at least one second hole formed on one surface thereof, and a fixing part formed on at least one of the first plate and the second plate to fix the first plate and the second plate. It provides a door pool resistance reduction device.

The present invention stabilizes the flow of seawater inside the door pool of the vessel generated during the operation of the vessel through the first hole and the second hole. Therefore, the ship speed is improved when the ship moves.

1A is a cross-sectional view showing the door pool shape of a conventional vessel.
Figure 1b is a cross-sectional view showing the vortex generated in the door pool during the operation of the drill ship during the navigation of the existing vessel and the sloshing phenomenon due to the vortex.
Figure 2a is a perspective view showing the door pool of the ship according to the present invention.
Figure 2b is a perspective view showing the door pool resistance reduction device of the ship shown in Figure 2a.
Figure 3a is an operation showing the operation of the door pool resistance reduction device of the ship shown in Figure 2a.
FIG. 3B is an enlarged view illustrating an operation of the door pool flow prevention device illustrated in FIG. 3A.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2a is a perspective view showing a door pool (M) of the ship according to the invention. Figure 2b is a perspective view showing the door pool resistance reduction device 100 of the ship shown in Figure 2a. In the figure, UD represents the upper deck, B represents the bottom, and UD and B can be more clearly understood with reference to FIG. 1A.

2A and 2B, the door pool resistance reduction apparatus 100 of the ship includes a first plate 110 fastened to be rotatable on one side of the door pool M of the ship. The first plate 110 blocks seawater flowing into the door pool M of the ship. In addition, the first plate 110 prevents the movement of the ship (S) by the sea water.

At least one first hole 111 penetrates one surface of the first plate 110. At least one first hole 111 may include a plurality. The plurality of first holes 111 are formed to be spaced apart from each other by a predetermined interval. The load may be minimized by reducing the weight of the first plate 110 by the plurality of first holes 111.

In addition, the first plate 110 may include at least one first reinforcing member 115 in the longitudinal direction and the width direction of the first plate 110. The at least one first reinforcement 115 prevents the first plate 110 from contacting the seawater and causing deformation.

At least one first reinforcing member 115 may include a plurality. The plurality of first reinforcing members 115 may be formed to be spaced apart from each other by a predetermined distance in the longitudinal direction of the first plate 110. In addition, the plurality of first reinforcing members 115 may be formed to be spaced apart from each other by a predetermined distance in the width direction of the first plate 110.

The plurality of first reinforcements 115 may include a first stiffener 113 and a first web 114. The first stiffener 113 is formed in the longitudinal direction of the first plate 110. The first web 114 is formed in the width direction of the first plate 110.

On the other hand, the first stiffener 113 is formed of a member such as an angle (angle) in order to mainly reinforce the first plate 110 in the longitudinal direction. In addition, the first web 114 is formed of a larger member than the first stiffener 113. The first web 114 serves as a transverse member that holds the first stiffener 113 and reduces the deformation of the first stiffener 113.

The first stiffeners 113 and the first webs 114 are formed in the first and second plate 110 in a horizontal and vertical net form. In addition, the first stiffener 113 and the first web 114 may be made of a light weight material.

Accordingly, the first plate 110 in which the plurality of first holes 111 are formed maintains the shape of the first plate 110 to tightly seal the door pool M of the ship. In addition, it effectively suppresses the flow of seawater flowing into the door pool (M) of the vessel.

Therefore, the plurality of first reinforcing members 115 prevent deformation by sea water of the first plate 110.

Water pool flow prevention device 100 of the ship includes a first hinge 130 is fastened to one side of the first plate (110). The first hinge 130 fastens the first plate 110 to one side of the door pool M of the ship. The first hinge 130 is fastened to the door pool M of the ship so that the first plate 110 is rotatable. Therefore, the user can easily rotate the first plate 110 according to the selection.

The door pool resistance reduction apparatus 100 of the ship includes a second plate 120 disposed to face the first plate 110. The second plate 120 is fastened to be rotatable to the other side of the door pool M of the ship. In addition, the second plate 120 prevents the movement of the vessel (S) by the sea water.

At least one second hole 121 penetrates one surface of the second plate 120. At least one second hole 121 may include a plurality. The plurality of second holes 121 are formed to be spaced apart from each other by a predetermined interval. The load may be minimized by reducing the weight of the second plate 120 by the plurality of second holes 121.

In addition, the second plate 120 may include at least one second reinforcing member 125 in the length direction and the width direction of the second plate 120. The at least one second reinforcement 125 prevents the second plate 120 from contacting the seawater and causing deformation.

At least one second reinforcing member 125 may include a plurality. The plurality of second reinforcement members 125 may be formed to be spaced apart from each other by a predetermined distance in the longitudinal direction of the second plate 120. In addition, the plurality of second reinforcement members 125 may be formed to be spaced apart from each other by a predetermined distance in the width direction of the second plate 120.

The plurality of second reinforcements 125 may include a second stiffener 123 and a second web 124. The second stiffener 123 is formed in the longitudinal direction of the second plate 120.

In addition, the second web 124 is formed in the width direction of the second plate 120.

The first stiffeners 113, the second stiffeners 123, and the first webs 114 and the second webs 124 are formed in the same manner with only a difference in size.

Accordingly, the plurality of second reinforcement members 125 prevents deformation by sea water of the second plate 120.

Water pool flow prevention device 100 of the ship includes a second hinge 140 is fastened to one side of the second plate (120). The second hinge 140 fastens the second plate 120 to one side of the door pool M of the ship. The second hinge 140 is fastened to the door pool M of the ship so that the second plate 120 is rotatable. Therefore, the user can easily rotate the second plate 120 according to the selection.

Meanwhile, the widths of the first plate 110 and the second plate 120 may be different from each other. The width of the first plate 110 may be smaller than the width of the second plate 120.

This is because the reference vessel of the invention is a single drilling vessel, so that the bow side needs only a space for assembling a riser, so that the door pool M of the vessel toward the first plate 110 is narrowly formed. On the other hand, if the ship is capable of dual drilling (dual drilling) it is possible to form the same width of the door pool (M) of the ship on the first plate 110 side and the door of the ship on the second plate 120 side.

In addition, a general shipboard thick plate may be used as the material of the first plate 110 and the second plate 120. AH36 or AH32 is mainly used as a material of the first plate 110 and the second plate 120.

The door pool resistance reduction apparatus 100 of the ship includes a fixing portion (not shown) formed on one side of the first plate 110 and the second plate 120. The fixing part fixes the first plate 110 and the second plate 120. The fixing part fixes the first plate 110 and the second plate 120 on the inner wall of the door pool M of the vessel. The fixing part includes a first fixing pin 112 formed on one side of the first plate 110. The fixing part includes a second fixing pin 122 formed on one side of the second plate 120.

The door pool resistance reduction apparatus 100 of the ship includes a seating portion (not shown) formed on one side of the first plate 110 and the second plate 120 and fastened to the fixing portion.

The seating part includes a first seating part 151 formed on the first plate 110. In addition, the seating portion includes a second seating portion 152 formed on one side of the second plate 120.

The first seating portion 151 and the second seating portion 152 are formed identically or similarly. Hereinafter, for convenience of description, the first mounting unit 151 will be described.

The first seating part 151 is formed so that one side is open so that the second fixing part 122 is inserted and fixed. The first seating portion 151 is formed to correspond to the shape of the second fixing portion 122.

Meanwhile, a third seating part 153 and a fourth seating part (not shown) are formed on the inner wall of the door pool M of the ship so that the first fixing part 112 and the second fixing part 122 are inserted. The third seating part 153 and the fourth seating part are formed the same as or similar to the first seating part 151 and the second seating part 152.

Accordingly, the first fixing part 112 and the second fixing part 122 may include the first mounting part 151, the second mounting part 152, according to the operation of the first plate 110 and the second plate 120. It is firmly fastened to the third seating part 153 and the fourth seating part.

Meanwhile, the door pool resistance reducing apparatus 100 of the ship may further include a driving device 190 for driving at least one of the first plate 110 and the second plate 120. At least one driving device 190 may be formed in various ways.

For example, the at least one driving device 190 may include a motor (not shown). In addition, the at least one driving device 190 may include a crane (not shown).

At least one driving device 190 may include a plurality. The plurality of driving devices 190 may include a first driving device 191 driving the first plate 110. The plurality of driving devices 190 may include a second driving device 192 for driving the second plate 120.

Hereinafter, the operation of the first plate 110 and the second plate 120 will be described in detail.

Figure 3a is an operation showing the operation of the door pool resistance reduction device 100 of the ship shown in Figure 2a. FIG. 3B is an enlarged view illustrating the operation of the door pool resistance reducing apparatus 100 of the ship illustrated in FIG. 3A.

Referring to FIGS. 3A and 3B, the door pool resistance reduction device 100 for opening and closing the door pool M of the ship includes a first plate 110 and a second plate 120 as described above.

The user opens and closes the first plate 110 and the second plate 120 according to the selection. At this time, the user inputs an input signal from the outside to drive the first driving device 191 and the second driving device 192.

In this case, when the first driving device 191 and the second driving device 192 are driven, the first plate 110 and the second plate 120 rotate.

For example, when the first driving device 191 is driven in the forward direction according to the input signal, the first plate 110 is rotated in the clockwise direction about the first hinge 130.

In addition, when the first plate 110 rotates, the second driving device 192 drives in the reverse direction according to the input signal. The second plate 120 rotates counterclockwise about the second hinge 140.

Therefore, the first plate 110 and the second plate 120 rotates at the same time to open the door pool (M) of the vessel. At this time, the first fixing part 112 is separated from the second seating part 152. In addition, the second fixing part 122 is separated from the first seating part 151.

When the first plate 110 completely opens the door pool M of the ship, the first fixing part 112 is inserted into the third seating part 153. Therefore, the first fixing part 112 supports the first plate 110 to fix the first plate 110.

When the second plate 120 completely opens the door pool M of the ship, the second fixing part 122 is inserted into the fourth seating part. Therefore, the second fixing part 122 is fastened to the fourth seating part to support the second plate 120.

On the other hand, when the first driving device 191 operates in the reverse direction according to the input signal, the first plate 110 rotates counterclockwise about the first hinge 130.

In addition, when the first driving device 191 operates in the reverse direction, the second driving device 192 operates in the forward direction according to the input signal. The second plate 120 rotates clockwise about the second hinge 140.

The first plate 110 and the second plate 120 rotates at the same time to close the door pool M of the vessel.

At this time, the first fixing part 112 is inserted into the second seating part 152. In addition, the second fixing part 122 is inserted into the first seating part 151.

Therefore, the first fixing part 112 and the second fixing part 122 firmly couple the first plate 110 and the second plate 120.

The user easily controls the first plate 110 and the second plate 120 through the input signal. In addition, the user can open or close the door pool (M) of the vessel easily and accurately according to the movement of the vessel (S).

Therefore, the user can easily and quickly open and close the door pool (M) of the vessel to suppress the flow inside the door pool. In addition, it is possible to quickly move the vessel (S) by blocking the inflow of sea water flowing into the door pool (M) of the vessel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: vessel pool resistance reduction device 125: the second reinforcement
110: first plate 130: first hinge
111: first hole 140: second hinge
112: first fixing pin 151: first seating portion
115: first reinforcing material 152: second seating portion
120: second plate 191: first drive device
121: second hole 192: second drive device
122: second fixing pin

Claims (9)

A first plate rotatably coupled to one side of the door pool of the ship and having at least one first hole formed on one surface thereof;
A second plate disposed to face the first plate and fastened rotatably to the other side of the door pool, and having at least one second hole formed on one surface thereof;
And a fixing part formed on at least one of the first plate and the second plate to fix the first plate and the second plate. The method according to claim 1,
The first plate is a door pool resistance reduction device of the ship in which at least one first reinforcement is formed in the longitudinal direction and the width direction of the vessel. The method according to claim 1,
The second plate is a door pool resistance reduction device of the ship in which at least one second reinforcement is formed in the longitudinal direction and the width direction of the vessel. The method according to claim 1,
And a first hinge for fastening the first plate to the door pool of the ship. The method according to claim 1,
And a second hinge for fastening the second plate to the door pool of the ship. The method according to claim 1,
The fixing unit includes:
A first fixing pin formed on the first plate and fastened to the second plate;
The door pool resistance reduction device of the ship comprising a second fixing pin formed on the second plate and fastened to the first plate. The method of claim 6,
A first seating part formed on the first plate and fastened to the second fixing pin;
And a second seating portion formed on the second plate and fastened to the first fixing pin. The method according to claim 1,
The at least one first hole and the at least one second hole include a plurality of,
A plurality of first holes are formed on one surface of the first plate spaced apart from each other by a predetermined interval,
And the plurality of second holes are formed on one surface of the second plate at predetermined intervals, respectively. The method according to any one of claims 1 to 8,
The width of the first plate is a door pool resistance reduction device of the ship is formed differently from the width of the second plate.

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