KR20160105267A - Carrier - Google Patents

Carrier Download PDF

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Publication number
KR20160105267A
KR20160105267A KR1020150113676A KR20150113676A KR20160105267A KR 20160105267 A KR20160105267 A KR 20160105267A KR 1020150113676 A KR1020150113676 A KR 1020150113676A KR 20150113676 A KR20150113676 A KR 20150113676A KR 20160105267 A KR20160105267 A KR 20160105267A
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KR
South Korea
Prior art keywords
flat plate
ceiling
plate portion
curved surface
tank cover
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KR1020150113676A
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Korean (ko)
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KR101777462B1 (en
Inventor
히로후미 츠카모토
사다토 스기야마
Original Assignee
미츠비시 쥬고교 가부시키가이샤
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Publication of KR20160105267A publication Critical patent/KR20160105267A/en
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Publication of KR101777462B1 publication Critical patent/KR101777462B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B3/00—Hulls characterised by their structure or component parts
    • B63B3/14—Hull parts
    • B63B3/62—Double bottoms; Tank tops
    • B63B2701/10—

Abstract

A carrier (1) comprises: a hull (2); multiple tanks (3) which are arranged in bow and stern directions to protrude upward from the hull (2); and a tank cover (10) which continuously covers the tanks (30) in bow and stern directions, wherein the tank cover (10) comprises: a ceiling flat plate part (11) which is located on the top of the tanks (3) and is extended in the breadth direction of the carrier to be flattened; and ceiling curved parts (12) which are extended from both sides of the ceiling flat plate part (11) in the breadth direction of the carrier to be curved. Therefore, the present invention improves shipbuilding performance and fuel efficiency by controlling the horizontal rolling of the carrier.

Description

CARRIER {CARRIER}

The present invention relates to a carrier.

For example, as in Patent Document 1, there is a carrier in which a plurality of tanks fixed to the hull so as to protrude above the hull are arranged in the direction of the ship's head. There is a carrier that protects the tank by covering the protrusion of the tank by the tank cover.

The tanker cover may be provided with a tank cover for individually covering a protruding portion (upper half portion) of a spherical tank projecting upward from the hull. In this case, each tank cover is often formed in a semi-spherical shape (curved surface shape).

The carrier may be provided with a tank cover which is formed to extend in the direction of the fore and aft and continuously covers the protruding portions of the plurality of tanks. In this type of tank cover, regardless of the shape of the tank, the cross section of the tank cover orthogonal to the bow direction is polygonal (for example, a trapezoidal shape). This polygonal tank cover is constituted by connecting a plurality of flat plate portions. The tank cover in a polygonal cross section is advantageous in that it can be easily manufactured as compared with a tank cover in which the whole is curved.

Japanese Unexamined Patent Publication No. 2005-521589

The tank cover on the polygonal cross section is peeled off from the edge portion formed between the adjacent flat plate portions in the line width direction when the wind (wind) is blown in the line width direction. Therefore, the peeling vortex occurs at the side of the tank cover (the downstream side of the lateral wind). In this case, a left-right shake (vibration) occurs in the carrier. Therefore, there is a possibility that the ship maneuverability of the carrier (in particular, the ship maneuverability in the port) may deteriorate.

In this way, there is a problem that the fuel consumption is lowered when the carrier shakes in the lateral direction.

An object of the present invention is to provide a carrier which can improve the shipbuilding property and the fuel consumption.

According to a first aspect of the present invention, there is provided a carrier according to the first aspect of the present invention, wherein the carrier includes a hull, a plurality of tanks arranged along the fore and aft direction so as to project upward from the hull, And a tank cover which continuously covers the tank cover. The tank cover has a ceiling plate portion located above a plurality of tanks and extending in a line width direction on a flat plate and a ceiling curved portion extending in a curved shape from both sides in the line width direction of the ceiling plate portion.

According to the carrier, the ceiling flat plate portion and the ceiling curved surface portion can be arranged so as to smoothly extend in the line width direction. Therefore, the flow of air caused by the wind (horizontal wind) in the line width direction is prevented from peeling off from the outer surface of the tank cover, and the occurrence of the peeling vortex can be suppressed. Therefore, lateral shaking (vibration) of the carrier due to the horizontal wind can be suppressed, and the shipbuilding property can be improved. In addition, since the occurrence of the left / right shake can be suppressed, the fuel consumption can be improved.

Further, the outer surface (upper surface) of the top plate portion constituting the top of the tank cover can be flat and utilized as a passage. Therefore, it is not necessary to provide a separate passage in the tank cover. Therefore, it is possible to reduce the manufacturing cost of the tank cover and the weight of the tank cover accompanying the simplification of the structure.

According to the second aspect of the present invention, the carrier may be such that the ceiling curved surface portion of the first aspect does not protrude upward from the ceiling flat plate portion.

In this case, the height dimension of the tank cover can be suppressed to a low level. Therefore, the area of the tank cover that receives the horizontal wind can be suppressed to be small, and shaking and vibration of the hull due to the horizontal wind can be suppressed. Therefore, improvement in shipbuilding properties can be further promoted.

According to a third aspect of the present invention, there is provided a carrier according to the first or second aspect, wherein the tank cover is provided on both sides in the line width direction of the ceiling plate portion and has an inclined flat plate portion inclined downward with respect to the ceiling plate portion . The ceiling curved surface portion may be formed to smoothly connect the ceiling flat plate portion and the inclined flat plate portion.

In this case, the ceiling curved surface portion can round the corner portion between the ceiling plate portion and the inclined flat plate portion. Therefore, occurrence of the peeling vortex in the corner portion can be effectively suppressed.

According to a fourth aspect of the present invention, there is provided a carrier according to the third aspect, wherein the inclined flat plate portions are arranged in a line width direction outward from an end portion in the line width direction of the ceiling flat plate portion, Wherein the inclined angle of the inclined flat plate portion with respect to the ceiling flat plate portion is larger than the inclined angle of the inclined flat plate portion located on the side closer to the ceiling flat plate portion and the tank cover smoothly connects the adjacent inclined flat plate portions And may have an inclined curved surface portion extending in a curved surface.

In this case, the corner portion between the adjacent inclined flat plate portions can be rounded by the inclined curved surface portion. Therefore, occurrence of the peeling vortex in the corner portion can be effectively suppressed.

According to the fifth aspect of the present invention, the carrier may have the inclined curved surface portion in the fourth aspect formed separately from the inclined flat plate portion.

In this case, it is possible to suppress the occurrence of the peeling vortex while using the tank cover having a polygonal cross section. Therefore, it is possible to improve the shipbuilding performance and fuel consumption of the carrier with low cost.

Further, as compared with the case where the inclined curved surface portion is integrally formed with the inclined flat plate portion, it is possible to easily manufacture the tank cover. That is, the manufacturing efficiency of the tank cover can be improved.

According to the sixth aspect of the present invention, the carrier may be formed between the inclined flat plate portions adjacent to each other in the inclined curved surface portion in the fourth aspect.

In this case, even if the tank cover is newly manufactured, the occurrence of the peeling vortex can be suppressed. Therefore, it is possible to improve the shipbuilding performance and fuel consumption of the carrier with low cost.

According to a seventh aspect of the present invention, there is provided a carrier according to the fourth aspect, wherein the inclined flat plate portions are arranged in a line width direction outward from an end portion in the line width direction of the ceiling flat plate portion, Wherein the inclined angle of the inclined flat plate portion with respect to the ceiling flat plate portion is larger than the inclined angle of the inclined flat plate portion located on the side closer to the ceiling flat plate portion and the ceiling curved portion is formed on the side of the ceiling plate portion among the plurality of inclined flat plate portions And at least two of the inclined flat plate portions disposed may be covered.

In this case, the corner portion between the adjacent inclined flat plate portions can be completely covered by the ceiling curved portion. Therefore, it is possible to effectively suppress the occurrence of the peeling vortex caused by the horizontal wind.

According to the eighth aspect of the present invention, the carrier curved surface portion in the first to sixth aspects may be formed separately from the ceiling flat plate portion.

In this case, it is possible to suppress the occurrence of the peeling vortex while using the tank cover having a polygonal cross section. Therefore, it is possible to improve the shipbuilding performance and fuel consumption of the carrier with low cost.

Further, as compared with the case where the ceiling curved surface portion is integrally formed with the ceiling flat plate portion, it is possible to easily manufacture the tank cover. That is, the manufacturing efficiency of the tank cover can be improved.

According to the ninth aspect of the present invention, in the carrier, the ceiling curved surface portions in the fourth to sixth aspects may be formed between the ceiling flat plate portion and the inclined flat plate portion. That is, the ceiling curved surface portion may be integrally formed with the ceiling flat plate portion or the inclined flat plate portion.

In this case, even if the tank cover is newly manufactured, the occurrence of the peeling vortex can be suppressed. Therefore, it is possible to improve the shipbuilding performance and fuel consumption of the carrier with low cost.

According to the present invention, suppressing the occurrence of peeling vortex due to the lateral wind, it is possible to suppress the lateral shaking (vibration) of the carrier and improve the shipbuilding property and the fuel consumption.

1 is a side view of a carrier according to a first embodiment of the present invention.
2 is a top view of the carrier according to the first embodiment of the present invention.
Fig. 3 is a sectional view of the carrier shown in Figs. 1 and 2. Fig.
4 is a cross-sectional view of a carrier according to a second embodiment of the present invention.
Fig. 5 is a cross-sectional view showing a modified example of the tank cover of the first embodiment shown in Fig. 3;
Fig. 6 is a cross-sectional view showing a modified example of the tank cover of the first embodiment shown in Fig. 3;
Fig. 7 is a cross-sectional view showing a modified example of the tank cover of the second embodiment shown in Fig. 4;

[First Embodiment]

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 3. Fig.

As shown in Figs. 1 to 3, a carrier 1 related to the present embodiment includes a ship 2, a plurality of tanks 3, and a tank cover 10. As shown in Fig.

The hull 2 is formed with a receiving concave portion 5 for receiving a plurality of tanks 3 from the deck 4. The accommodating concave portion 5 extends in the direction of the bow.

A supporting portion 6 (skirt) for individually supporting a plurality of tanks 3 from below is formed in the accommodating concave portion 5. The support portion 6 of the present embodiment is formed cylindrically so as to correspond to the shape of the tank 3. The support portion 6 is fixed on the stepped surface 8 (foundation deck) positioned lower stepwise than the deck 4. The supporting portion 6 is fixed on the step surface 8 on the inner side of the end portion in the line width direction of the accommodating concave portion 5. The supporting portion 6 is fixed to the stepped surface 8 so that the axial direction thereof is directed to the height direction of the hull 2.

On the deck (4) of the ship (2), a deckhouse (7) functioning as a residence of the passenger is formed. The deckhouse (7) is formed to extend upward from the deck (4). In the present embodiment, the deckhouse 7 is provided adjacent to the stern side of the hull 2 than the above-mentioned accommodating concave portion 5 in the bow direction.

A plurality of tanks (3) are arranged so as to protrude upward from the ship (2). These tanks 3 are arranged side by side in the fore-and-aft direction. The inside of each tank 3 is a receiving space. The lower half (lower half) of each tank 3 is disposed in the accommodating concave portion 5 of the hull 2. The upper half of each tank 3 protrudes upward from the deck 4 of the hull 2.

The tank 3 of this embodiment is formed in a spherical shape. In the receiving space of the tank 3, for example, an intake such as natural gas (LNG; liquefied natural gas) liquefied by low temperature is accommodated. The lower half portion (lower half portion) of each tank 3 is disposed in the accommodating concave portion 5 of the hull 2. The upper half section (upper half section) of each tank 3 protrudes upward from the deck 4 of the hull 2.

The diameter dimension of the tank 3 is larger than the diameter dimension of the support portion 6 formed cylindrically. Thereby, the outer surface of the lower hemispherical portion of the tank 3 comes into contact with the upper end of the supporting portion 6. For this reason, the tank 3 can be stably supported by the support portion 6.

The tank cover 10 continuously covers the plurality of tanks 3 in the bow direction. The tank cover 10 is formed in an arch shape (door shape) surrounding the upper half of the tank 3 in a cross section orthogonal to the bow direction. The tip end of the tank cover 10 on the forward side is formed so that the front portion becomes narrower (the arch-shaped cross section becomes smaller) as it goes toward the bow direction. In the illustrated example, the end of the tank cover 10 on the aft side is formed to be narrowed like the end of the forward side. However, the end on the aft side of the tank cover 10 may not be formed to be, for example, narrowed at the front portion. The stern side end of the tank cover 10 is in contact with the deckhouse 7 as shown in the drawing, but may be separated from the deckhouse 7, for example.

The tank cover 10 has a ceiling plate portion 11 and a ceiling curved portion 12.

The ceiling flat plate portion 11 is located above the plurality of tanks 3 and extends in the form of a flat plate in the line width direction.

The ceiling curved surface portion 12 extends on the curved surface from both sides in the line width direction of the ceiling flat plate portion 11. [

Although the ceiling plate portion 11 extends in the line width direction as shown in the drawing for example, it may be formed so as to be inclined downward slightly from the center in the line width direction toward the line width direction outer side. When the ceiling plate portion 11 is slightly inclined, it is possible to prevent the rainwater from sticking to the ceiling plate portion 11.

The ceiling curved surface portion 12 has an arc-shaped outer surface in cross section orthogonal to the bow direction. The ceiling curved surface portion 12 is connected to both ends of the ceiling flat plate portion 11 in the line width direction.

The tank cover 10 further includes an inclined flat plate portion 13. The inclined flat surface portions 13 are disposed on both sides in the line width direction of the ceiling flat plate portion 11 and are formed in a flat plate shape inclined downward with respect to the ceiling flat plate portion 11. [

The inclined flat plate portions 13 of the present embodiment are arranged a plurality (three each) in the line width direction from the respective end portions in the line width direction of the ceiling flat plate portion 11. [ The inclined angle of the inclined flat plate portion 13 located on the side far from the ceiling flat plate portion 11 with respect to the ceiling flat plate portion 11 of the inclined flat plate portions 13 is set to be closer to the ceiling flat plate portion 11 Is greater than the inclination angle of the inclined flat plate portion (13) with respect to the ceiling flat plate portion (11).

In the present embodiment, the first inclined flat plate portion 13A, the second inclined flat plate portion 13B, and the third inclined flat plate portion 13C are arranged in order from the end side of the ceiling flat plate portion 11. The inclination angle of the second inclined flat plate portion 13B with respect to the ceiling flat plate portion 11 is larger than the inclined angle of the first inclined flat plate portion 13A and the inclined angle of the third inclined flat plate portion 13C is larger than the inclined angle with respect to the second inclined flat plate portion 13B, Is larger than the inclination angle of the portion (13B). The angle of inclination of the third inclined flat plate portion 13C is, for example, 90 degrees with respect to the ceiling plate portion 11, and extends in the height direction of the hull 2.

The tip end of the third inclined flat plate portion 13C is an opening end of the tank cover 10. [ The third inclined flat plate portion 13C is arranged so as to face the side portion (end in the line width direction) of the tank 3 in a state in which the plurality of tanks 3 are covered with the tank cover 10. [

The tank cover (10) has an inclined curved surface portion (14). The inclined curved surface portions 14 are formed so as to smoothly connect the inclined flat plate portions 13 adjacent to each other in the line width direction and extend on the curved surface. Like the ceiling curved surface portion 12, the inclined curved surface portion 14 has an outer surface whose cross section orthogonal to the forward direction is an arc shape. The inclined curved surface portion 14 is formed so that the corner portion between the inclined flat plate portions 13 adjacent to each other in the line width direction becomes rounded. That is, the inclined curved surface portions 14 are formed such that the inclined flat plate portions 13 adjacent to each other in the line width direction are continuous, for example.

In the tank cover 10 of the present embodiment, the above-mentioned ceiling plate portion 11 and each of the inclined flat plate portions 13 are integrally formed to constitute the cover main body 15. The ceiling curved surface portion 12 and the inclined curved surface portion 14 are formed separately from the cover main body 15 and are fixed to the cover main body 15.

The cover main body 15 can be formed of a metal material having high rigidity such as steel. The cover main body 15 is connected to the inclined flat plate portion 13 (first inclined flat plate portion 13A) at both ends in the line width direction of the ceiling flat plate portion 11. [ In addition, adjacent inclined flat plate portions 13 are connected to each other in the cover main body 15. That is, the cover main body 15 is configured in the same manner as the tank cover in a general cross-sectional polygonal shape.

The ceiling curved surface portion 12 and the inclined curved surface portion 14 can be formed of a resin material which is cheaper and lighter than the metal material constituting the cover main body 15. [

The ceiling curved surface portion 12 smoothly connects the ceiling flat plate portion 11 and the inclined flat plate portion 13 (first inclined flat plate portion 13A). The ceiling curved surface portion 12 is formed so that the corners of the ceiling flat plate portion 11 and the inclined flat plate portion 13 (first inclined flat plate portion 13A) become rounded. That is, the ceiling curved surface portion 12 is formed such that, for example, the ceiling flat plate portion 11 and the inclined flat plate portion 13 (first inclined flat plate portion 13A) are continuous.

The ceiling curved surface portion 12 of the present embodiment is fixed to the outer surface of the first inclined flat plate portion 13A so as to protrude from the outer surface of the first inclined flat plate portion 13A. The ceiling curved surface portion 12 is fixed to the end portion of the first inclined flat plate portion 13A on the side of the ceiling plate portion 11. The inclined angle inclined downward with respect to the ceiling plate portion 11 is curved so as to become larger toward the outside in the line width direction from the line width direction end portion of the ceiling plate portion 11 . As a result, the ceiling curved surface portion 12 does not protrude from the outer surface (upper surface) of the ceiling flat plate portion 11. In other words, the ceiling curved surface portion 12 is disposed below the outer surface (upper surface) of the ceiling plate portion 11. [

The inclined curved surface portion 14 is formed so that the corner portion between adjacent inclined flat plate portions 13 becomes rounded. The inclined curved surface portion 14 of this embodiment is fixed to each outer surface so as to protrude from the outer surfaces of the first inclined flat plate portion 13A and the second inclined flat plate portion 13B.

The first inclined curved surface portion 14A is fixed to the end of the first inclined flat plate portion 13A on the second inclined flat plate portion 13B side. The first inclined curved surface portion 14A is curved so as to be directed inward in the line width direction as the inclined direction with respect to the second inclined flat plate portion 13B is away from the second inclined flat plate portion 13B. Thereby, the first inclined curved surface portion 14A does not protrude from the outer surface of the second inclined flat plate portion 13B. In other words, the first inclined curved surface portion 14A does not protrude outward in the line width direction from the outer surface of the second inclined flat plate portion 13B.

The second inclined curved surface portion 14B is fixed to the end of the second inclined flat plate portion 13B on the side of the third inclined flat plate portion 13C. The second inclined curved surface portion 14B is formed so that the inclined direction with respect to the third inclined flat plate portion 13C is inclined toward the line width direction And is curved toward the inside. Thus, the second inclined curved surface portion 14B does not protrude from the outer surface of the third inclined flat plate portion 13C. In other words, the second inclined curved surface portion 14B does not protrude outward in the line width direction from the outer surface of the third inclined flat plate portion 13C. That is, the inclined curved surface portion 14 of the present embodiment does not protrude outward beyond the side (widthwise end) of the cover body 15 in the width direction.

The tank cover 10 constructed as described above is fixed to the hull 2 in a state in which the opening end of the tank cover 10 abuts on the deck 4. [ The top of the tank cover 10 fixed to the hull 2 (the top plate 11 in the present embodiment) is positioned lower than the deckhouse 7. [ Thereby, it is possible to prevent the field of view in the bow direction of the deckhouse 7 from being blocked by the tank cover 10.

In the carrier 1 of the present embodiment configured as described above, the ceiling plate portion 11 and the ceiling curved portion 12 are arranged so as to smoothly extend in the line width direction. Therefore, it is possible to suppress the peeling of the air flow caused by the wind (horizontal wind) in the line width direction from the outer surface of the tank cover 10, and to suppress the occurrence of the peeling vortex. Particularly, in the present embodiment, the ceiling curved surface portion 12 can round the corners of the ceiling plate portion 11 and the inclined plate portion 13 (first inclined plate portion 13A). Therefore, occurrence of the peeling vortex in the corner portion can be effectively suppressed. Further, in the present embodiment, the corner portion between the inclined flat plate portions 13 adjacent to each other can also be rounded by the inclined curved surface portion 14. Therefore, occurrence of the peeling vortex in the corner portion can be effectively suppressed. Therefore, lateral shaking (vibration) of the carrier 1 due to the horizontal wind can be suppressed, and improvement in the shipbuilding property (particularly, the shipbuilding property in the port) can be achieved. In addition, since the occurrence of the left / right shake can be suppressed, the fuel consumption can be improved.

Since the outer surface (upper surface) of the top plate portion 11 forming the roof of the tank cover 10 is flat and can be utilized as a passage, it is necessary to provide a separate passage (flying passageway) It disappears. Therefore, it is possible to reduce the manufacturing cost of the tank cover 10 and the weight of the tank cover 10 accompanying the simplification of the structure.

In the carrier 1 of the present embodiment, the ceiling curved surface portion 12 or the inclined curved surface portion 14 is formed separately from the ceiling flat plate portion 11 or the inclined flat plate portion 13. Therefore, it is possible to suppress the occurrence of the peeling vortex while using the cover body 15 which is the same as the tank cover 10 in the general cross-sectional polygonal shape. Therefore, the shipbuilding performance and the fuel consumption of the carrier 1 can be improved at low cost.

In addition, since the cover body 15, which is the same as the conventional one, is excellent in manufacturing easiness, the ceiling curved surface portion 12 or the inclined curved surface portion 14 is formed integrally with the ceiling flat plate portion 11 or the inclined flat plate portion 13 It is possible to manufacture the tank cover 10 easily. That is, the manufacturing efficiency of the tank cover 10 can be improved.

The ceiling curved surface portion 12 or the inclined curved surface portion 14 can be formed separately from the ceiling flat plate portion 11 or the inclined flat plate portion 13, It can be formed of a resin material which is cheaper and lighter than the main body 15. Therefore, the production cost and weight of the tank cover 10 can be reduced while suppressing the occurrence of the peeling vortex.

In the carrier 1 of the present embodiment, the ceiling curved surface portion 12 does not protrude upward from the outer surface (upper surface) of the ceiling flat plate portion 11. [ In other words, the ceiling curved surface portion 12 is disposed below the outer surface (upper surface) of the ceiling plate portion 11. Therefore, the height dimension of the tank cover 10 can be suppressed to a low level. Therefore, the area of the tank cover 10 receiving the horizontal wind can be suppressed to be small, and the shaking and vibration of the hull 2 caused by the horizontal wind can be suppressed. Therefore, improvement in shipbuilding properties can be further promoted.

In the carrier 1 of the present embodiment, since the inclined curved surface portion 14 does not project outward in the line width direction from the side portion of the cover body 15, the dimension in the line width direction of the tank cover 10 is not increased, Improvement of shipbuilding ability and fuel efficiency can be planned.

[Second Embodiment]

Next, a second embodiment of the present invention will be described with reference to Fig. 4, focusing on differences from the first embodiment. The same reference numerals are given to components common to those of the first embodiment, and a description thereof will be omitted.

As shown in Fig. 4, the carrier 1A of the present embodiment includes a hull 2, a plurality of tanks 3, and a tank cover 10A in the same manner as the carrier 1 of the first embodiment. The tank cover 10A has the same ceiling plate portion 11 and ceiling curved surface portion 12A as in the first embodiment. The tank cover 10A also has the same inclined flat plate portion 13 as that of the first embodiment. The ceiling plate portion 11 and the inclined plate portion 13 are integrally formed to constitute the cover main body 15. The ceiling curved surface portion 12A is formed separately from the cover main body 15 and is fixed to the cover main body 15. [

The ceiling curved surface portion 12A of the present embodiment has at least two inclined flat plate portions 13 (in the present embodiment, in the present embodiment) among the plurality of inclined flat plate portions 13 (13A to 13C) arranged on the side of the ceiling plate portion 11 Is fixed to the inclined flat plate portion 13 so as to cover the first and second inclined flat plate portions 13A and 13B as a whole.

The end portion of the ceiling curved surface portion 12A on the side of the ceiling plate portion 11 is fixed to the end of the first inclined flat portion 13A on the side of the ceiling plate portion 11 so as to be smoothly connected to the ceiling plate portion 11 have.

As in the first embodiment, the ceiling curved surface portion 12A is formed so that the inclination angle inclined downward with respect to the ceiling flat plate portion 11 becomes larger from the line width direction end of the ceiling flat plate portion 11 toward the outer side in the line width direction And is curved. Thus, the ceiling curved surface portion 12A does not protrude from the outer surface (upper surface) of the ceiling flat plate portion 11. [

The end of the ceiling curved surface portion 12A on the third inclined flat plate portion 13C side is connected to the third inclined flat plate portion 13C of the second inclined flat plate portion 13B so as to be smoothly connected to the third inclined flat plate portion 13C. As shown in Fig. Like the second inclined curved surface portion 14B of the first embodiment, the inclined direction of the ceiling curved surface portion 12A with respect to the third inclined flat plate portion 13C becomes longer from the third inclined flat portion 13C, As shown in Fig. Thereby, the ceiling curved surface portion 12A does not protrude from the outer surface of the third inclined flat plate portion 13C.

That is, the ceiling curved surface portion 12A is formed such that the ceiling flat plate portion 11 and the inclined flat plate portion 13 (third inclined flat plate portion 13C) are continuous.

The carrier 1A of the present embodiment exhibits the same effects as those of the first embodiment.

Further, according to the present embodiment, the corner portions of the inclined flat plate portions 13 adjacent to each other can be completely covered by the ceiling curved surface portion 12A. Therefore, it is possible to effectively suppress the occurrence of the peeling vortex caused by the horizontal wind.

The configuration of the second embodiment described above can be combined with the configuration of the first embodiment, for example. For example, in the case where four or more inclined flat plate portions 13 are arranged on both sides in the line width direction of the ceiling flat plate portion 11, the ceiling curved surface portion 13 of the second embodiment, in which two or more inclined flat plate portions 13 are collectively covered, The inclined curved surface portion 12A and the inclined curved surface portion 14 of the first embodiment in which the adjacent inclined flat plate portions 13 are smoothly connected to each other.

Although the present invention has been described in detail in the foregoing, the present invention is not limited to the above-described embodiments, and various modifications can be added within the scope not departing from the gist of the present invention.

For example, the ceiling curved surface portions 12 and 12A are not limited to those fixed to the inclined flat plate portion 13 adjacent to the ceiling flat plate portion 11. [

The ceiling curved surface portion 12 of the first embodiment may be fixed to the ceiling flat plate portion 11, for example, as shown in Fig. In this case, the ceiling curved surface portion 12 is formed on the top surface of the ceiling flat plate portion 11 so that the corners of the ceiling flat plate portion 11 and the inclined flat plate portion 13 (first inclined flat portion 13A) In the line width direction. The pair of ceiling curved surfaces 12 may be arranged at intervals such that at least a part of the ceiling flat plate 11 is exposed to the outside between the pair of ceiling curved surfaces 12 in the line width direction.

6, the ceiling curved surface portion 12 of the first embodiment includes a ceiling flat plate portion 11 and an inclined flat plate portion 13 (first inclined flat plate portion 13A) adjacent to the ceiling flat plate portion 11, As shown in Fig.

That is, the ceiling curved surface portion 12 may be formed between the ceiling flat plate portion 11 and the inclined flat plate portion 13 adjacent thereto.

6, an end portion of the ceiling curved surface portion 12A of the second embodiment on the side of the ceiling plate portion 11 may be formed by, for example, a ceiling plate portion 11 and an inclined plate portion 13 (The first inclined flat plate portion 13A) of the first inclined flat plate portion 13A. The end portion of the ceiling curved surface portion 12A of the second embodiment on the side of the third inclined flat portion 13C is formed so as to cover the edge portions of the second inclined flat portion 13B and the third inclined flat portion 13C, And may be fixed to the third inclined flat plate portion 13C.

The inclined curved surface portion 14 of the first embodiment may be fixed to the corner portions of the adjacent inclined flat plate portions 13 like the ceiling curved surface portion 12 shown in Fig.

The ceiling curved surface portions 12 and 12A or the inclined curved surface portions 14 are not limited to those formed separately from the ceiling flat plate portion 11 or the inclined flat plate portion 13 and may be integrally formed .

7, the ceiling curved surface portion 12A of the second embodiment may be formed between the ceiling plate portion 11 and the inclined plate portion 13 (third inclined plate portion 13C) . That is, the first inclined flat plate portion 13A and the second inclined flat plate portion 13B (see Fig. 4) covered by the ceiling curved surface portion 12A of the second embodiment are omitted, and the ceiling curved surface portion 12A, May have a function of covering the tank 3 together with the ceiling plate portion 11 or the third inclined flat plate portion 13C.

Similarly, for example, the ceiling curved surface portion 12 of the first embodiment may be formed between the ceiling flat plate portion 11 and the inclined flat plate portion 13. For example, the inclined curved surface portion 14 of the first embodiment May be formed between the adjacent inclined flat plate portions 13. 3) of the ceiling plate portion 11 or the inclined flat plate portion 13 covered by the ceiling curved surface portion 12 and the inclined curved surface portion 14 of the first embodiment is omitted And the ceiling curved surface portion 12 or the inclined flat plate portion 14 may have a function of covering the tank 3 together with the ceiling flat plate portion 11 or the inclined flat plate portion 13. [

When the ceiling curved surface portion 12 is integrally formed on the ceiling flat plate portion 11, the tank cover has, for example, a ceiling flat plate portion 11 and a ceiling curved surface portion 12, 13 or the inclined curved surface portion 14 may be omitted.

In the case where the ceiling curved surface portion 12 or 12A or the inclined curved surface portion 14 is integrally formed with the ceiling flat plate portion 11 or the inclined flat plate portion 13, even if the tank cover is newly manufactured, It becomes possible to inhibit it. Therefore, it is possible to improve the shipbuilding performance and fuel consumption of the carrier with low cost.

When the ceiling curved surface portions 12 and 12A are formed to smoothly connect the ceiling flat plate portion 11 and the inclined flat plate portion 13, the ceiling curved surface portions 12 and 12A are, for example, It is preferable that a step or knuckle is formed between the top plate 11 and the inclined flat plate 13 within a range in which peeling vortexes can be suppressed in the corner portions of the inclined flat plate 13 and the inclined flat plate 13, . Likewise, in the case where the inclined curved surface portion 14 is formed so as to smoothly connect the adjacent inclined flat plate portions 13, the inclined curved surface portion 14 can suppress occurrence of, for example, peeling vortexes The inclined flat plate portion 13 may be formed so as to have a step or knuckle between the adjacent inclined flat plate portion 13.

1, 1A: Carrier
2: Hull
3: Tank
10, 10A: tank cover
11: ceiling plate portion
12, 12A: ceiling curved portion
13, 13A, 13B, 13C: an inclined flat plate portion
14, 14A, 14B: an inclined curved surface portion

Claims (9)

The hull,
A plurality of tanks arranged along the fore and aft direction so as to protrude upward from the hull,
And a tank cover which continuously covers the plurality of tanks in the direction of the bow,
Wherein the tank cover
A ceiling flat plate portion located above the plurality of tanks and extending in a line width direction on a flat plate;
And a ceiling curved surface portion extending in a curved shape from both sides in the line width direction of the ceiling flat plate portion. The method according to claim 1,
Wherein the ceiling curved portion is disposed below the upper surface of the ceiling plate portion. The method according to claim 1,
Wherein the tank cover has inclined flat plate portions disposed on both sides in the line width direction of the ceiling flat plate portion and inclined downward with respect to the ceiling flat plate portion,
Wherein the ceiling curved surface portion is formed to smoothly connect the ceiling flat plate portion and the inclined flat plate portion. The method of claim 3,
A plurality of the inclined flat plate portions are arranged outward in the line width direction from an end portion in the line width direction of the ceiling flat plate portion,
Wherein an inclination angle of the inclined flat plate portion with respect to the ceiling flat plate portion located farther from the ceiling flat plate portion is larger than the inclination angle of the inclined flat plate portion located closer to the ceiling flat plate portion,
Wherein the tank cover has an inclined curved surface portion formed to smoothly connect the inclined flat plate portions adjacent to each other and extending on a curved surface. 5. The method of claim 4,
Wherein the inclined curved surface portion is formed separately from the inclined flat plate portion. 5. The method of claim 4,
Wherein the inclined curved surface portion is formed between adjacent inclined flat plate portions. The method of claim 3,
A plurality of the inclined flat plate portions are arranged outward in the line width direction from an end portion in the line width direction of the ceiling flat plate portion,
Wherein an inclination angle of the inclined flat plate portion with respect to the ceiling flat plate portion located farther from the ceiling flat plate portion is larger than the inclination angle of the inclined flat plate portion located closer to the ceiling flat plate portion,
Wherein the ceiling curved surface portion covers at least two inclined flat plate portions disposed on the side of the ceiling plate portion among the plurality of inclined flat plate portions. 7. The method according to any one of claims 1 to 6,
Wherein the ceiling curved surface portion is formed separately from the ceiling flat plate portion. 7. The method according to any one of claims 4 to 6,
Wherein the ceiling curved portion is formed between the ceiling plate portion and the inclined plate portion.
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KR101777462B1 (en) 2017-09-11
JP6304558B2 (en) 2018-04-04

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