KR20160009191A - Structure for moonpool - Google Patents

Abstract

According to an embodiment of the present invention, a structure for a moon pool comprises: an airfoil unit which is provided at a circumferential surface of the moon pool and forms a discharging hole through which air discharges toward the bottom of the moon pool so as to move sea water inside the moon pool in the bottom direction; and a driving unit which supplies air to the airfoil unit. According to the invention, the structure for a moon pool can reduce damage of the inside of the moon pool caused by a flow of sea water and can minimize fluid resistance generated at the moon pool, by letting the sea water, flowing inside the moon pool, to flow downward by lowering temperature in order to raise density, by pressing down the sea water by blocking the inside of the moon pool through an ice layer or the piston unit, or by pressing down the sea water so the sea water cannot rise by generating an air current moving downward.

Description

Structure of moonpool {Structure for moonpool}

The present invention relates to a layout structure.

Due to the recent rapid industrialization, the use of resources such as oil has skyrocketed, and the stable production and supply of oil is becoming a very important issue. However, the oil field in the continental or coastal waters has already been drilled. In recent years, interest has been focused on the development of a deep-sea deep-sea oil field. Drilling is generally used to drill deep-sea oilfields.

Drill ship is an offshore structure that is equipped with advanced drilling equipment and is built in a shape similar to that of a ship so that it can be sailed by its own power. It is capable of collecting raw oil or gas in deep sea area where an offshore platform can not be installed, It is advantageous that the drilling can be terminated and the drilling can be carried out by moving to another point.

Such drillings include Derrick, which has a Moonpool structure in a vertically penetrating form and is located above the drum and has drilling rigs. Hereinafter, the process of drilling the bottom of the drill ship will be described.

First, the drill ship uses its own power to move to the drilling area and drives a Dynamic Positioning System (DPS) using a plurality of thrusters to maintain the position.

Thereafter, the drill bit is connected to a drill pipe by a drill bit, and a plurality of drill pipes are connected by a sufficient length by using a Hoisting System and a Handling System provided in Derrick, And the drilling pipe is rotated through a rotating system to form a borehole.

Once drilling is completed, Derek picks up the drill pipe, installs the casing pipe on the borehole, and performs the cementing process to fill the concrete between the casing pipe and the borehole. The drilling operation used and the casing and cementing work for installing the casing pipe are repeatedly performed to maintain the shape of the borehole having a certain depth.

When the casing pipe is installed enough to prevent the borehole from falling down, BOP (Blow Out Preventer) is connected to the riser to be connected to the borehole. In this case, the inside of the riser becomes the path of movement of the drill pipe and casing pipe.

However, lubrication and cooling of the drill bit in the drilling process, and processing of the crushed material such as rock mass produced in the borehole are required. Therefore, the drill feeds the mud to the inside of the drill pipe so that the mud is discharged at the end of the drill bit, and after the mud performs lubrication and cooling of the drill bit, (Mud Circulation System) is used. The recovered mud is re-used after the pulverized material is filtered.

The drillship repeatedly performs drilling, casing and cementing operations until the drill bit reaches the well, while driving this mud circulation system. In this case, as the diameter of the casing pipe used in the casing work becomes smaller, Drilling can be implemented continuously by replacing small drill bits.

As such, the drill rig has a system for installing and using pipes and risers, a system using a mud, and the like. In order to smoothly perform drilling work using such a system, a drill hole structure, a derrick structure, and a load structure Is required to be disposed within a certain space, so that research and development are being continuously carried out as a result of a high technological power being required.

However, in the drilling operation, it is necessary to open the riser and the like in order to move up and down. However, since an opening is formed at the center of the hull such as drill bit, resistance due to flow inside the drum occurs. Of course, There is a problem that the seawater is introduced and the equipment in the door pool is damaged.

In order to prevent this, Korean Open No. 10-1999-0079571 (Nov. 5, 1999), an opening and closing door is installed in the lower part of the doorpost in a door-dropping resistance reducing device of a ship. In the case where an opening- Even if the door is closed in a floating state, the already inflowed seawater is contained in the inside of the door, the resistance is increased due to the sloshing phenomenon caused by the swirling of the seawater, and it is easy to manage after the corrosion or attachment of marine life not. In addition, if a malfunction of the opening / closing device occurs during operation, since the opening and closing device is locked in seawater, it may be difficult to repair it immediately.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional art, and it is an object of the present invention to provide a drainage structure capable of reducing a fluid resistance of a fluid inside a drum during a drill or semi-submergible offshore structure, .

An airfoil portion provided on a circumferential surface of the door frame so as to move the seawater inside the door frame in a downward direction and having a discharge hole through which air is discharged in a downward direction of the door frame; And a driving unit for supplying air to the airfoil portion.

Specifically, the airfoil portion includes: a first guide portion forming an outer circumferential surface; And a second guide portion which is formed to be an inner circumferential surface and is engaged with the first guide portion to form the discharge hole.

Specifically, the distance between the first guide part and the second guide part increases from the lower part to the upper part, so that the air supplied from the driving part is accelerated from the lower part to be moved upward.

Specifically, the end face of the second guide portion has an annular shape, and the air supplied from the drive portion moves along the annular shape of the second guide portion, thereby increasing the flow velocity.

Specifically, the second guide portion is characterized in that its upper portion is convex.

Specifically, the driving unit sucks ambient air and supplies the air sucked into the air blower.

Specifically, the driving unit includes: a driving motor; And a driving fan that is rotated by the driving motor to suck air from one side and discharge the air to the other air foil part.

The structure of the door frame according to the present invention is designed such that the sea water flowing down into the interior of the door frame is lowered by lowering the temperature and the density is lowered or the seawater is pushed downward through the ice layer or the piston part, It is possible to minimize the fluid resistance generated in the door frame and to reduce the damage in the door frame due to the flow of seawater.

1 is a view conceptually showing a structure of a door frame according to a first embodiment of the present invention.
FIG. 2 is a view conceptually showing a structure of a door frame according to a second embodiment of the present invention.
3 is a view conceptually showing a structure of a door frame according to a third embodiment of the present invention.
FIG. 4 is a view conceptually showing a structure of a door frame according to a fourth embodiment of the present invention.
FIG. 5 is a view for explaining an airfoil portion of a door frame structure according to a fourth embodiment of the present invention.
FIG. 6 is a view showing a flow of air and seawater around an airfoil in the structure of a door frame according to a fourth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

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

1 is a view conceptually showing a structure of a door frame according to a first embodiment of the present invention.

As shown in FIG. 1, a door frame structure 100 according to an embodiment of the present invention includes a door frame 110 and a sea water temperature reducing unit 120.

The portal 110 forms a space through the center of a hull (not shown) or semi-submergible offshore structure, for example, to operate equipment for drilling, such as drilling.

In the present embodiment, the drill ship is not limited to the drill ship, for example, and may be applied to semi-submergible offshore structures. In the case of a drill, a drum 110 is provided at a central portion of a hull forming a single sub-fluid to penetrate from an upper deck 11 to a base line 12 of the hull, (Not shown) may be provided so as to be able to perform the operation.

The door frame 110 may extend substantially vertically and pass through equipment such as a drilling rig and a robot into the door frame 110. That is, the portal 110 can be used as a passage for the equipment. Here, the drilling equipment includes a riser (not shown) for drilling, a drill pipe (not shown), and the drilling equipment can be stored and installed in the hull adjacent to the periphery of the platform 110 .

In addition, a space may be formed on the cellar deck (not shown) in a stepped manner, and a blow out preventer (BOP, not shown) is provided in the space of the cellar deck .

The door frame 110 may have a polygonal shape. For example, the door frame 110 may have a rectangular parallelepiped shape or a cubic shape so as to form a first side wall 111 provided in the stern direction and a second side wall 112 provided in the fore- And may be formed in a shape of a cell deck not shown in the drawing but having a concave stepped portion in a bow direction. The door frame 110 is formed in a space that remains after a plurality of equipments provided on the drill string are disposed, and may have various shapes such as a cylinder in addition to a polyhedral shape.

The sea water temperature reduction unit 120 provided in the door frame 110 is configured to increase the density of seawater by lowering the temperature of the sea water. When the sea water temperature in the door pool 110 is lowered to increase the density, The seawater in the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the inside of the room 110 has a force to descend from the inside of the inside of the inside of the inside of the inside of the inside of the inside .

Here, the seawater temperature reduction unit 120 may be a circulation line in which the low-temperature gas such as liquefied nitrogen can be circulated. The circulation line may be made of general piping, and may be heat-exchanged with seawater to reduce the temperature of the seawater, for example, protruding from the inner wall of the door 110. These circulating lines can directly contact the seawater and heat exchange with the seawater to reduce the temperature of the seawater.

The circulation line of the seawater temperature reduction unit 120 is heat-exchanged with the inner side wall of the door frame 110 at the inner side wall of the door frame 110 and the inner side wall of the door platform 110 having the lowered temperature is heat- The efficiency of the heat exchange, such as heat exchange, may be reduced, for example, when the door 110 does not require heat exchange, It may be preferable to protrude into the heat exchanger 110 and directly contact the sea water to perform heat exchange.

The circulation line of the seawater temperature reducer 120 may protrude from the lower side of the door 110, which is a position where seawater flows along the inner wall of the door 110, and a contact surface for heat exchange The portion protruding to the door frame 110 to be widened may have a twisted shape like a coil or a zigzag shape. The circulation line of the seawater temperature reduction unit 120 directly contacts with the seawater in the inside of the door frame 110 to reduce the temperature of the seawater to increase the density. Accordingly, the seawater inside the door frame 110 is relatively lowered as compared with the sea water outside the door frame 110, so that the force for raising the seawater flowing into the door frame 110 is reduced, It is possible to suppress the flow of the sea water flowing into the sea water.

For example, the seawater temperature reduction unit 120 may include not only a circulation line but also a low temperature gas storage tank (not shown) and a low temperature gas supply pump (not shown) in which low temperature gas is stored so that low temperature gas can circulate inside the circulation line Temperature gas supply pump pressurizes and discharges the low temperature gas in the low temperature gas storage tank to pass through the circulation line and the low temperature gas discharged to the circulation line is heat exchanged with the seawater at the inner wall of the door 110 And then recovered to a low-temperature gas storage tank or a separate recovery tank (not shown).

As described above, according to the present embodiment, by using the low-temperature gas to heat-exchange seawater in the interior of the door frame 110 and forming a low-temperature layer in the interior of the door frame 110, seawater having a decreased temperature and a higher density , The flow in the interior of the door frame 110 can be stabilized.

FIG. 2 is a view conceptually showing a structure of a door frame according to a second embodiment of the present invention. The same or corresponding elements as those of the first embodiment described above are denoted by the same reference numerals, and redundant description thereof will be omitted.

The layout structure 200 will be described with reference to FIG. The present embodiment is different from the first embodiment in that it further includes the ice layer forming portion 230 and the ice floating preventing protrusion 240. [

The seawater temperature reducing unit 120 of this embodiment is in contact with the cooling material and seawater sprayed by the ice layer forming unit 230 so as to delay the phase change of the seawater cooled by the ice layer forming unit 230, It is possible to delay the phase change of the sea water that has become the ice layer (I) again into liquid.

The seawater temperature reducing unit 120 is provided to protrude from the circumferential surface of the door frame 110 so that the ice layer I formed by the ice layer forming unit 230 can be fixed to prevent floating of the ice layer I. .

The ice layer forming unit 230 may reduce the flow of seawater into the interior of the door frame 110 by forming an ice layer I in the interior of the door frame 110 to block the interior of the door frame 110 with the ice layer I. The ice layer forming unit 230 cools the seawater by spraying the cooling material with the seawater flowing into the door frame 110.

Here, the cooling material may include a sub-cooled liquid, for example, liquid nitrogen. The liquid nitrogen has a temperature of minus 196 ° C at atmospheric pressure, so it can be sprayed into the seawater to quench the seawater. In addition, the cooling material can include ice inducing nuclei (powder, granules, and the like) for inducing cooling, so that seawater cooled by liquid nitrogen is aggregated together by the freezing induction nuclei, so that the formation rate of the ice layer is accelerated The ice layer I may be formed in the interior of the door frame 110 within a short time. The ice layer I formed in a short time (about five minutes or more in a general structure of the floors) crosses the door frame 110, so that it is possible to reduce drifting ice caused by small ice blocks before the ice layer is formed. In addition, the formation of the ice layer is for reducing the flow amount of the seawater flowing in the inside of the door frame 110 during the operation of the ship, and it is possible to form an ice layer during the operation of the ship, Ice layer formation can be performed in a state where the ship is fixed after the drilling operation is completed in order to prevent the occurrence of drift ice collision.

The ice layer forming unit 230 of this embodiment includes a cooling material supply nozzle for injecting a cooling material, a cooling material storage tank (not shown) for storing the cooling material, and a cooling material supply pump The cooling material pressurized by the cooling material supply pump and discharged from the cooling material storage tank may be sprayed from the casing material supply nozzle to cool the seawater. Here, the cooling material supply nozzle is exposed toward the door frame 110 through the inner wall of the door frame 110, so that the cooling material can be injected into the sea water inside the door frame 110. Of course, the coolant supply nozzle may be provided with a spray line (not shown) and extended to the coolant supply pump and the coolant storage tank. A backflow prevention valve (not shown) may be provided in the injection line to prevent the seawater from flowing back through the cooling material supply nozzle of the ice layer forming unit 230, and a general valve (not shown) Of course.

In addition, the cooling material supply nozzles through which the cooling material is injected may be provided in a plurality of radial directions along the inner circumferential surface of the door 110 at the inner side wall of the door 110.

The ice layer forming unit 230 may be provided at the same position as the sea water temperature reducing unit 120. Preferably, the ice layer forming unit 230 is provided at an upper portion of the sea water temperature reducing unit 120, Thereby preventing the cooling material supply nozzle from being clogged.

In this case, the seawater temperature lowering part 120 is provided on the inner surface of the door 110 so that the ice layer I is formed on the same side as the bottom surface 12 of the hull forming the door frame 110, And may be provided at the lower end of the side wall surface.

This is because the seawater temperature reducer 120 shortens the cooling rate of the seawater or delays the cooled seawater from warming by surrounding seawater (having a higher temperature than the cooled seawater) to form the cooling layer I So that the formation of the ice layer I can be easily performed on the position of the seawater temperature reduction unit 120. [

The ice float prevention protrusions 240 are provided on the inner side wall of the door frame 110 separately from the seawater temperature reduction unit 120 so as to block floating of the ice layer I.

Here, the seawater temperature reducing unit 120 is provided on the same line as the ice layer I to fix the ice layer I, and the ice floating preventing protrusion 240 prevents the ice layer I from rising at the upper part of the ice layer I do.

That is, in the process of forming the ice layer I, the seawater and the cooling material are cooled at the periphery of the seawater temperature reduction unit 120 and adhere to the seawater temperature reduction unit 120 to form an ice layer, 120) can fix the ice layer.

Alternatively, the ice float prevention protrusions 240 may form a step along the inner wall surface of the door frame 110. For example, the ice float prevention protrusions 240 may be formed in a ring shape, a closed curve shape, A plurality of projections may be provided along the inner wall of the door frame 110. The ice float prevention protrusion 240 functions as a stopper by being positioned above the ice layer I to prevent the ice layer I from moving upward.

In addition to being fixed to the space of the door 110, the ice floating preventing protrusion 240 may be slidably inserted into or protruded from the inside wall of the waterfall 110. For example, .

The ice layer I formed by the ice layer forming part 230 is closed across the inside of the door frame 110 so that the sea ice can be prevented from entering the door frame 110 by the ice layer I during the operation of the ship, It is possible to reduce the flow of seawater in the interior of the door frame 110. When the drilling operation is performed, the driving of the ice layer forming unit 230 and the seawater temperature reducing unit 120 is stopped, So that the drilling operation can be performed.

3 is a view conceptually showing a structure of a door frame according to a third embodiment of the present invention. The same or corresponding elements as those of the first and second embodiments described above are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

The layout structure 300 will be described with reference to FIG. The present embodiment differs from the first and second embodiments in that the seawater temperature reducing unit 120, the ice layer forming unit 230, and the ice floating preventing protrusion 240 are different. That is, in this embodiment, the piston 350 and the sealing member 370 may be provided in the interior of the door frame 110.

The piston 350 is provided in the interior of the door frame 110 and presses the seawater inside the door frame 110 downward to reduce the amount of seawater flowing in the interior of the door frame 110. The piston 350 is floated on the door frame 110 by itself and has a specific gravity higher than that of the seawater in the piston 350 so that the piston 350 is floated on the door 110, A material may be provided to press seawater flowing into the interior of the door frame 110.

The material provided in the piston part 350 is not limited to the state of solid, liquid or the like material but may be made of powder (steel material or the like) to flow into or out of the piston part 350, And may be provided in a stored state.

When the material flows into or out of the piston 350, the volume of the piston 350 may expand or contract to the same volume, and the height of the piston 360 may be adjusted depending on the amount of the powder. Here, when the volume of the piston 350 is increased or decreased, the piston 350 is contracted to open the door 110.

When the material flows in and out, the door frame structure 300 may further include a supply portion 360 to allow the material to flow into and out of the piston portion 350. The supply part 360 may be a pump if the material is a liquid and a powder injector if the material is powder.

When the piston 350 is closed and the material is stored in the piston 350, the piston 350 is lifted by a crane (not shown) To close the door 110 or to move from the door 110 to open the door 110.

In this embodiment, preferably, the powdered material flows in and out of the piston portion 350, and the load of the door frame 110 is adjusted by the amount of the powder, so that the position at which the piston portion 350 is floated in the door frame 110 .

The sealing member 370 is provided between the piston 350 and the door frame 110 to seal the door frame 110. For example, the sealing member 370 may be formed in a ring shape, may be formed of one or more pieces, and may be made of a rubber material or the like. The sealing member 370 may be provided in a row above and below the piston 350 when a plurality of sealing members 370 are provided (two in this embodiment, for example).

The sealing member 370 can seal the door frame 110 by preventing the gap between the piston 350 and the door frame 110 from being generated by closely contacting the piston 350 and the door frame 110. For example, the sealing member 370 may be fixed on a position where the piston 350 is provided on the inner wall of the door 110. At this time, the piston 350 may have a reduced volume Or may be expanded to open or close the door 110.

Alternatively, when the piston 350 is moved by a crane or the like to open and close the door 110, the sealing member 370 may be fixed to the circumferential surface of the piston 350 and may be coupled with the piston 350 May be detached from the door frame 110 or may be provided in the door frame 110.

Thus, in the present embodiment, by providing the piston portion 350 into which a substance such as iron powder or the like having a specific gravity higher than that of the sea water is provided, the material in the piston portion 350 is prevented from seawater By providing a higher specific gravity, it is possible to prevent the piston 350 from simply floating on the sea surface, and by pushing down the seawater, the flow of the seawater can be prevented and the resistance due to the fluid can be reduced.

FIG. 4 conceptually illustrates a structure of a door frame according to a fourth embodiment of the present invention, and FIGS. 5 and 6 are views for explaining an airfoil portion of a door frame structure according to a fourth embodiment of the present invention. The same or corresponding elements as those of the above-described embodiments are denoted by the same reference numerals, and redundant description thereof will be omitted.

The layout structure 400 will be described with reference to Figs. 4 to 6. Fig. In this embodiment, the seawater temperature reducing part 120, the ice layer forming part 230, the ice floating preventing protrusion 240, the piston part 350, and the sealing member 370 are configured differently in the above-described embodiments. That is, in this embodiment, the seawater flow reduction unit 480 for moving downward the seawater inside the door frame 110 may be provided. The seawater flow reduction unit 480 of the present embodiment can reduce the amount of seawater flow in the interior of the interior space 110 by pressing the seawater inside the interior space 110 downward through the air flow. The seawater flow reduction portion 480 may be provided with an airfoil portion 481 and a driving portion 482.

The air blow part 481 is communicated with the driving part 482 and the air is blown from the driving part 482 to the air blow part 481. In this embodiment, do. 5, the air flowing along the inner space of the air fork portion 481 is discharged through the discharge hole 4813, so that air (air) .

The airfoil portion 481 is configured to decrease the flow amount of the seawater flowing into the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior of the interior Direction. The airfoil portion 481 is provided on the circumferential surface of the door frame 110. The airfoil portion 481 has a first guide portion 4811 and a second guide portion 4811 so as to form a space for forming a flow of air therein. A discharge hole 4813 is formed which includes the portion 4812 and through which the air is discharged to the lower portion of the door frame 110.

Here, the air foil portion 481 is shown in an annular shape for convenience in FIGS. 5 and 6, but is not limited thereto. The airfoil portion 481 may have various shapes such as a circle, a closed curve, and a polygon corresponding to the shape of the door frame 110.

The first guide portion 4811 constitutes the outer circumferential surface of the air blowing portion 481 and the second guide portion 4812 constitutes the inner circumferential surface of the air blowing portion 481, The second guide portion 4812 may be engaged with the first guide portion 4811 so that the discharge hole 4813 is formed in the upper portion of the second guide portion 4812. [ Here, the discharge hole 4813 may be in the form of a gap provided between the first guide portion 4811 and the second guide portion 4812. The second guide portion 4812 may be formed around the lower end of the door frame 110. The air guide portion 481 may be formed such that the second guide portion 4812 abuts against the seawater and the discharge hole 4813 contacts the seawater. It can be done at an unlocked height.

The distance between the first guide portion 4811 and the second guide portion 4812 increases as the distance from the lower portion to the upper portion increases. That is, the lower portion of the lower portion of the air fork portion 481 is narrower, The speed of the air discharged when the air flows into the lower portion of the air guide portion 481 is accelerated to be pushed up along the inner wall surface of the first guide portion 4811 in the space of the air guide portion 481.

In addition, the upper portion of the first guide portion 4811 adjacent to the discharge hole 4813 forms a curved surface to guide the moving direction of the air, so that air rising along the first guide portion 4811 is guided to the first guide portion 4811, and may be deflected toward the discharge hole 4813 side.

The cross section of the second guide portion 4812 has an annular shape and the air supplied from the drive portion 482 is pushed up along the annular shape of the second guide portion 4812 and the flow speed is increased due to the structural characteristics of the annulus . The air whose flow rate has been increased by the second guide portion 4812 in the air blower portion 481 is discharged to the seawater in the inside of the spray gun 110 through the discharge hole 4813.

At this time, since the discharge hole 4813 is formed as a gap between the first guide portion 4811 and the second guide portion 4812, air of a high speed is guided to the second guide portion 4811 of the air- The air pressure of the inner surface of the round ring of the second guide portion 4812 is lowered at this time through the discharge hole 4813 in the form of a gap along the annular shape of the second guide portion 4812.

Therefore, the air around the second guide portion 4812 is guided to the inside of the second guide portion 4812, causing a strong air flow passing through the annular shape of the second guide portion 4812. At this time, the amount of air passing through the annular shape of the second guide portion 4812 may be increased by about 15 times as much as the amount of air sucked through the driving motor, which will be described later.

In addition, the second guide portion 4812 has a convex upper portion. When the air moving on the outer side of the second guide portion 4812 passes through the convex portion of the second guide portion 4812, The speed can be accelerated. The air pressure is lowered at the upper portion of the second guide portion 4812 where the air is accelerated and the lower portion of the relatively flat second guide portion 4812 can have higher air pressure.

As a result, the air inside the air fork portion 481 is quickly blurred and air in the air forcible portion 481 is strongly blown out through the discharge hole 4813, which is a small gap. The second guide portion 4812, The outer air of the second guide portion 4812 passes through the circular ring of the second guide portion 4812 to form a strong airflow in a certain direction from the upper portion to the lower portion as shown in Fig. 6 (the flow of air and seawater around the airfoil portion) .

The driving portion 482 is configured to supply air into the air blowing portion 481, and can suck ambient air from one side and discharge the air to the air blowing portion 481 on the other side. For example, the driving unit 482 may include a driving motor (not shown) and a driving fan (not shown).

The driving motor may be a general motor, and the driving fan may be rotated by generating a rotational force through electrical driving. The driving fan is rotated by the driving motor to suck air from the outside of the driving unit 482 to discharge the air into the air fork 481 to increase the amount of air discharged from the inside of the air fork 481 have.

In addition, in this embodiment, the sea water guide portion 490 may be provided on the bottom surface of the forefoot side of the door frame 110. When the hull is operated and advanced, the seawater flowing from the front to the rear of the hull passes through the sea water guide portion 490.

At this time, the flow velocity of the sea water passing through the narrow width of the sea water guide portion 490 is increased. That is, the seawater flowing in front of the door frame 110 from the bottom surface 12 of the hull passes through the seawater guide portion 490 and accelerates the flow velocity, The amount of motion of the seawater flowing into the interior of the door frame 110 can be reduced.

As described above, according to the present embodiment, air is discharged at a high speed from the inside of the airfoil portion 481, and the effect of the Bernoulli and Coanda effect, which forms a strong airflow from the upper portion to the lower portion of the doorpane 110, 110, the amount of the fluid flowing into the interior of the door 110 can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

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.

I: ice layer 100, 200, 300, 400; The structure of the portal
110: a floor space 120: a sea water temperature reduction part
230: ice layer forming part 240: ice floating preventing projection
350: piston part 360: supply part
370: Sealing member 480: Seawater flow reduction part
481: Air foil part 482: Driving part
4811: first guide part 4812: second guide part
4813: Discharge hole 490: Seawater guide section

Claims (7)

An airfoil portion provided on a circumferential surface of the doorpane so that seawater in the doorpath is moved in a downward direction, and a discharge hole through which air is discharged in a downward direction of the doorpath; And
And a driving unit for supplying air to the air blower part. The air conditioner according to claim 1,
A first guide part forming an outer circumferential surface; And
And a second guide portion which is formed to be in an inner circumferential surface and is engaged with the first guide portion to form the discharge hole. 3. The method of claim 2,
Wherein the distance between the first guide part and the second guide part is increased from the lower part to the upper part, so that the air supplied from the driving part accelerates from the lower part to move upward. 3. The method of claim 2,
The end face of the second guide portion has an annular shape,
Wherein the air supplied from the driving unit moves along the annular shape of the second guide unit to increase the flow velocity. 3. The apparatus according to claim 2,
And the upper portion is convex. The driving apparatus according to claim 1,
And the air sucked by the air blower is sucked into the air blower. The driving apparatus according to claim 1,
A drive motor; And
And a drive fan that is rotated by the drive motor to suck air from one side and discharge air to the other airfoil portion.

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