KR20150002614U - Rolling reduction moonpool structure of ship - Google Patents

Abstract

The present invention relates to a rolling reduction structure of a ship, more specifically, it can reduce the resistance due to seawater flow and seawater friction generated in the interior of a door by shutting off the door during the operation of the ship, It is possible to reduce the energy consumption required for the operation while reducing the flap from protruding out of the hull to the outside of the hull during the drilling operation so as to resist the rotational force generated when the hull is rolled, motion of the ship.
The rolling reduction structure of the ship according to the present invention is hinged to the lower portion of the door frame so as to be positioned in the longitudinal direction of the hull and installed to protrude downward from the hull; And a flap driving part for maintaining the flap projecting downward from the hull or providing a rotational force to the flap to close the door flap.

Description

{Rolling reduction moonpool structure of ship}

The present invention relates to a structure for rolling reduction of a ship, more specifically, to allow the ship to reduce the resistance due to seawater flow and seawater friction while the vessel is in operation, and to resist the rotational force generated during rolling of the hull during drilling. To a rolling reduction structure of a constructed ship.

Along with the development of submarine mining techniques, drilling lines have been developed with drilling facilities suitable for marginal field or deep-sea oil field development. Conventional submarine drilling has been mainly used for rig ships or fixed platforms for underwater drilling, which can be sailed only by other tugboats and for submarine drilling at anchor point at the sea using a mooring device. However, In recent years, a drillship has been developed to be equipped with advanced drilling equipment and constructed in the same form as a ship so that it can be navigated by its own power, and is used for drilling underwater.

The drill ship is formed with a moonpool for installation of various equipment for drilling. The moonpool has a hollow structure formed to penetrate vertically between the deck and the bottom of the hull. While this type of drilling is indispensable for drilling operations, it acts as a large resistance during the operation of the drill ship and has various adverse effects. That is, when the drill ship is operated, the sea water in the interior of the drum is heavily flowed to cause an overflow, and it acts as a serious resistance to the operation of the ship due to friction with seawater.

In order to reduce the overflow of seawater and the friction with seawater through such a doorway, there is a door frame structure of Korean Unexamined Patent Publication No. 10-2013-0059837 as prior art. This is a BOP test space formed on the rear side of the door frame; A guide array rotatably hinged to an inner surface of the door frame to open and close the door frame; And an opening and closing unit installed to open and close the door frame by rotating the guide array.

However, in the related art, the guide array is closed during the movement, and the guide array is folded on the inner wall of the drum during drilling or the like, so that the resistance to the drum during the operation is reduced only. It was necessary to improve it because the utilization was not so high.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a flap for preventing the flap from interfering with the sea water during the operation of the ship, So that it is possible to control the roll motion of the ship by making it fall outside the hull so as to resist the rotational force generated when the hull is rolled.

According to an aspect of the present invention, there is provided a door structure of a ship, comprising: a flap which is hinged to a lower portion of the door frame so as to be positioned in a longitudinal direction of the hull and protrudes downward from the hull; And a flap driving part for maintaining the flap projecting downward from the hull or providing a rotational force to the flap to close the door wrap.

The flaps may be installed side by side on the port side and on the starboard side from the bottom of the door frame.

The flap driving unit may include a hydraulic cylinder in which both ends of the hull and the flap are hinged to each other.

The flap may be provided with a stopper at a portion hinged to the door frame so as to restrain upward rotation in a state where the door frame is blocked.

The stopper may be connected to the flap driving unit.

According to another aspect of the present invention, there is provided a structure of a ship in which a flap is hinged to a lower portion of the door frame, wherein the flap is maintained to be projected downward by rotation, The rolling reduction structure of the ship is provided.

The flap may be rotated by a hydraulic cylinder in which both ends are hingedly coupled to the hull.

According to the present invention, it is possible to reduce the resistance due to seawater flow and seawater friction generated in the door frame by shutting off the flap during the operation of the ship, thereby preventing a decrease in the speed of the operation, And during the drilling operation, the flap is lowered to protrude outwardly from the hull so as to resist the rotational force generated when the hull is rolled, thereby controlling the roll motion of the ship.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view illustrating a rolling reduction structure of a ship in accordance with one embodiment of the present invention;
FIG. 2 is a front section view showing a rolling resistance state in a rolling reduction structure of a ship according to one embodiment of the present invention; FIG.
FIG. 3 is a front sectional view showing a state in which the door is closed in a rolling reduction structure of a ship according to an embodiment of the present invention; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following embodiments can be modified into various other forms, and the scope of the present invention is not limited to the following embodiments.

FIG. 1 is a perspective view showing a rolling reduction structure of a ship according to an embodiment of the present invention, and FIG. 2 is a front sectional view showing a rolling resistance state in a rolling reduction structure of a ship according to an embodiment of the present invention .

As shown in Figures 1 and 2, a rolling reduction structure 100 of a vessel according to one embodiment of the present invention includes a flap 120 hinged to the bottom of a moonpool 110 A flap driving unit 130 is provided to maintain the flap 120 protruded downward by rotation or to keep the door 110 shut off and to provide a driving force to the flap 120 .

The rolling reduction structure 100 of the ship according to one embodiment of the present invention can be applied not only to drillships but also to all ships having the portal 110, including excavation lines. In addition, although the door frame 110 has a hexagonal hollow structure as in the present embodiment, the door frame 110 is not limited thereto, and may have various hollow structures including a cylindrical shape.

The flap 120 is hinged to a lower portion of the door frame 110 to be positioned in the longitudinal direction of the hull 200 and is installed to protrude downward from the hull 200. The hinge coupling portion 121 having a hinge shaft And may be installed side by side on the port side and on the starboard side in the lower portion of the door frame 110 as in the present embodiment. In addition, the flap 120 does not completely close the door 110 by having a gap necessary for the operation when the lower end of the door 110 is closed, and can also block only a part of the door 110 even when horizontally arranged. You can have a size. The reason why the flap 120 is located in the longitudinal direction of the hull 200 and which is positioned on the port side and the starboard side in the lower portion of the door frame 110 is effectively disposed to suppress rolling of the hull 200.

The flap 120 may be provided with a stopper 122 at a portion hinged to the door frame 110, that is, at the hinge engaging portion 121 to prevent upward rotation in a state where the door frame 110 is blocked . These stoppers 122 may be provided continuously along the longitudinal direction of the hinge engaging portion 121 as in this embodiment, or may be provided in a plurality of discontinuous manner at intervals along the longitudinal direction of the hinge engaging portion 121 It is possible.

The flap driving unit 130 may be configured to maintain the flap 120 protruding downward from the hull 200 or to provide the rotational force to the flap 120 to close the door 110. For this purpose, It is possible to connect the wires and rotate the flap 120 by driving the winch. However, when the flap 120 protrudes below the hull 200 as in the present embodiment, And a hydraulic cylinder operated by hydraulic pressure supplied from an external hydraulic pressure supply unit to supply the driving force of the motor to the flap 120 through a speed reducer or a gear to rotate the flap 120 Can be configured.

When the flap driving unit 130 includes a hydraulic cylinder, both ends of the flap driving unit 130 can be hinged to the hull 200. To this end, both ends of the hull 200 and the flap 120 are hinge- And are appropriately spaced apart from the center of the flap 120 by a separate connecting member or a connecting portion integrally provided to the flap 120 so as to generate a moment necessary to rotate the flap 120 Eccentric position and may be installed in any suitable number of flaps 120 to provide the driving force necessary to rotate the flaps 120. [

The stopper 122 is connected to the flap driving unit 130 so that the flap driving unit 130 is coupled to the flap 120. The stopper 122 may be disposed at one end of the hydraulic cylinder as the flap driving unit 130, Can be hingedly coupled.

The operation of the rolling reduction structure of the ship according to the present invention will now be described.

As shown in FIGS. 1 and 2, in the case of a ship, for example, a drillship, in order to move equipment necessary for drilling through the door 110 during drilling operation, by driving the flap driving unit 130 The flap 120 is rotated downward about the hinge engaging portion 121 so as to maintain the protruded state of the hull 200 downward. At this time, the hull 200 is rolled due to the external environment such as the flow of sea water. The flap 120 fixed to extend under the hull 200 acts as a resistance against the rotational force due to the rolling, Thereby enabling to control the roll motion of the motor.

3, when the ship is to operate, the flap 120 is horizontally positioned at the lower end of the door 110 by driving the flap driving unit 130, thereby blocking the lower end of the door 110, This reduces the resistance due to seawater flow and seawater friction generated in the interior space 110 during the operation of the ship, prevents the speed of the ship from lowering, and reduces the energy consumption required for the operation.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. It is.

110: a flip 120: a flap
121: hinge connecting portion 122: stopper
130: flap driving part 131, 132:
200: Hull

Claims (7)

In the structure of the portal of a ship,
A flap hinged to a lower portion of the door frame so as to be positioned in a longitudinal direction of the hull and installed to protrude downward from the hull; And
And a flap driving part for maintaining the flap projecting downward from the hull or for providing rotational force to the flap to close the door wrap. The method according to claim 1,
The flap
And a plurality of rollers disposed on the front and rear sides, respectively, in the lower portion of the door frame. The method according to claim 1,
The flap driving unit includes:
And a hydraulic cylinder in which both ends of the hull and the flap are hinged to each other. The method according to claim 1 or 3,
The flap
And a stopper is provided at a portion hinged to the door frame so as to restrain upward rotation in a state where the door frame is blocked. The method of claim 4,
The stopper
A rolling reduction structure of the ship connected to the flap drive. In the structure of the portal of a ship,
And a flap hinged to a lower portion of the door frame,
Wherein the flap is maintained in a state in which the flap is projected downwardly by rotation or the state in which the door frame is blocked is maintained. The method of claim 6,
The flap
Wherein the hull is rotated by a hydraulic cylinder hinged at both ends between the hull and the hull.

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