KR102077895B1 - liquefied gas carrier - Google Patents

Abstract

The liquefied gas carrier ship according to the present invention, the liquefied gas carrier ship including a plurality of liquefied gas tank provided along the longitudinal direction of the hull, the bow of the hull, the upper portion, the central portion and the lower portion, the central portion, The left and right vertical and vertical, and the left and right width is enlarged from the front end of the hull toward the rear, the lower portion is characterized by having a spherical bow protruding from the center portion.

Description

Liquefied Gas Carrier

The present invention relates to a liquefied gas carrier.

LPG, a liquefied petroleum gas, is a fuel that is liquefied by cooling or pressurizing a gas component ejected with crude oil from an oil field during petroleum mining, and is characterized by having a high calorific value based on propane and butane.

Liquefied petroleum gas is easily liquefied and vaporized, and the volume decreases when it is changed from gas to liquid. The boiling point of liquefied petroleum gas is about -42 degrees Celsius, and when liquefied liquefied petroleum gas at room temperature, propane is reduced to 1/260, butane is reduced to a volume of 1/230, there is an advantage of convenient storage and transportation.

Liquefied petroleum gas is transported by ship (especially LPG carriers) from the point of production to the point of consumption. At this time, the ship has a plurality of liquefied gas storage tank, the liquefied petroleum gas can be accommodated in a low temperature liquid state in the liquefied gas storage tank.

On the other hand, the vessel supporting the liquefied gas storage tank can sail along a variety of paths, if there is a canal on the path of the ship can be limited by the size of the ship according to the size of the canal.

For example, if a ship must pass through the old Panama Canal, the width of the ship cannot exceed 32.3 meters, and a ship that can cross the Old Panama Canal is called a panamax. However, the new Panama Canal, which allows ships up to 49 meters in width, has been opened recently, and ships that can pass through the new Panama Canal are called new panamax, and existing panamas are called post panamax. .

The width is limited as above for the ship to pass through the old Panama Canal. In this case, the total capacity of the liquefied gas that can be loaded on the ship must be limited, so the total capacity of the liquefied gas is about 60K for the safe operation of the ship. Only carriers were operating.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to provide a liquefied gas carrier that can further increase the cargo capacity while passing through the old Panama Canal.

The liquefied gas carrier ship according to an aspect of the present invention, in the liquefied gas carrier ship including a plurality of liquefied gas tank provided along the longitudinal direction of the hull, the bow of the hull, the upper portion, the central portion and the lower portion, The center portion has a form in which the left and right are vertically vertical and the left and right widths are enlarged from the front end of the hull to the rear, and the lower portion has a spherical bow protruding from the center portion.

Specifically, the front and rear minimum lengths between the front end of the liquefied gas tank and the front end of the hull may be 19 to 21m.

Specifically, the front and rear minimum length between the front end of the liquefied gas tank and the front end of the hull may be smaller than the height of the hull.

Specifically, the maximum left and right width of the lower portion in the transverse end surface of the hull may be more than the left and right width of the central portion.

Specifically, the difference between the maximum left and right widths of the lower portion and the left and right widths of the center portion may be gradually increased and decreased from the front end of the hull toward the rear.

In detail, the front end of the liquefied gas tank placed at the forefront may be parallel to a point where the maximum left and right widths of the lower portion and the left and right widths of the central portion coincide with each other, or may be located behind the point.

Specifically, the front and rear lengths from the point recessed rearward between the upper deck and the bulbous athlete to the front end of the bulbous athlete may be 1 to 2 m.

Specifically, the front end of the bulbous bow, may be parallel to the front end of the upper deck.

Liquefied gas carrier according to the present invention, while having a width that can pass through the old Panama Canal, can deform the hull shape to secure a storage capacity of liquefied gas of 70K or more, and also improve the linear and internal structure, structural stability Etc. can be improved.

1 is a side view of a liquefied gas carrier according to the present invention.
2 is a plan view of a liquefied gas carrier ship according to the present invention.
3 is a plan sectional view of a liquefied gas carrier according to the present invention.
Figure 4 is a side view of the bow of the liquefied gas carrier according to the present invention.
5 is a cross sectional view taken from A to D in FIG.
Figure 6 is a front sectional view showing the cross-section of the liquefied gas carrier ship in accordance with the present invention.
7 is a front sectional view of a liquefied gas carrier according to the first embodiment of the present invention.
8 is an exploded plan view of a liquefied gas carrier according to the present invention.
9 is a front sectional view of a liquefied gas carrier according to the first embodiment of the present invention.
10 is a front sectional view of a liquefied gas carrier according to a second embodiment of the present invention.
11 is a front sectional view of a liquefied gas carrier according to a third embodiment of the present invention.
12 is a side view of a liquefied gas carrier ship according to a fourth embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Liquefied gas in the present invention may be used as a meaning encompassing liquefied petroleum gas, liquefied natural gas and the like.

1 is a side view of a liquefied gas carrier according to the present invention, FIG. 2 is a plan view of a liquefied gas carrier according to the present invention, FIG. 3 is a plan sectional view of a liquefied gas carrier according to the present invention, and FIG. 4 is according to the present invention. Side view of the bow of a liquefied gas carrier.

In addition, Figure 5 is a cross-sectional view in the A to D of Figure 1, Figure 6 is a front sectional view showing the cross-section of the liquefied gas carrier ship in accordance with the present invention.

7 is a front sectional view of a liquefied gas carrier according to the first embodiment of the present invention, and FIG. 8 is an exploded plan view of a liquefied gas carrier according to the present invention.

1 to 8, the liquefied gas carrier ship 1 according to the first embodiment of the present invention is accommodated in the hull 10 and the hull 10 and a plurality of ships along the longitudinal direction of the hull 10. Dog is provided and includes a liquefied gas tank 20 for storing the liquefied gas.

The hull 10 has a bow 11 at the front in the longitudinal direction and a stern 12 at the rear. In addition, the upper deck 14 is provided on the upper side when viewed in the transverse direction, the side shell plate 13 is provided on both left and right sides, the lower end may be defined as the bottom 15.

Hereinafter, in the present specification, the front or rear means the front or the rear in the longitudinal direction (longitudinal direction) of the hull 10, and the left and right in the width direction (lateral direction) of the hull 10 (left) or the right (starboard) Please note that it means.

The player 11 of the hull 10 may be provided with a bulbous player 114. The bulbous bow 114 is a spherical structure projecting forward to reduce the wave resistance, the upper side of the bulb bow 114 may be provided recessed to the rear.

That is, between the bulbous bow 114 and the upper deck 14 is formed a point recessed to the rear, the water line may be located at this point. In this case, the bow 11 wave splits along the surface of the bulbous bow 114 at this point and flows along the side shell plate 13.

The bow 11 of the hull 10 according to the present invention, as shown in Figs. 5 and 6, the upper part 115, the lower part 116, the central part 117 based on the transverse end surface of the hull 10. It can be made of). The upper portion 115 means a portion downward from the upper deck 14, the lower portion 116 means a portion upward from the bottom 15, the central portion 117 is the upper portion 115 and the lower portion 116 Means between.

The upper portion 115 of the bow 11 may include a portion in which the left and right widths decrease downward from the upper deck 14. At this time, the upper deck 14 may have an inclination that the height is lowered toward both sides from the center of the hull 10, the shape of the upper portion 115 in the cross section may be a rhombus shape. For reference, the inclination of the upper deck 14 may be constant rearward from the front end 11a of the hull 10. Here, the shear 11a may include the shear 11a between the top and bottom of the hull 10 when viewed from the side.

The height of the upper 115, that is, the height from the upper deck 14 to the lower end of the upper 115 may vary from front to rear. For this reason, the height of the central portion 117 may also vary from the front to the rear.

The lower portion 116 may include a portion in which the bulbous bow 114 is provided upward from the bottom 15. The lower portion 116 may have a form in which the left and right widths are enlarged compared to the central portion 117, which is due to the cross-sectional shape of the bulbous bow 114.

The central portion 117 is provided between the upper portion 115 and the lower portion 116 and has a form in which the left and right widths are constant between the upper end and the lower end. That is, the central portion 117 may have a rectangular shape in the cross section.

The central portion 117 has a constant left and right width between the upper end and the lower end, and the left and right widths are enlarged toward the rear from the front end 11a of the hull 10 (D-> C-> B-> A in FIG. 5). It may be in the form. In addition, the central portion 117 may vary in height toward the rear from the front end (11a) of the hull (10). In detail, the central portion 117 may have a form in which the height of the upper end is gradually increased and lowered toward the rear from the front end 11a of the hull 10, and the height of the lower end is gradually increased. Of course, the height change of the top and bottom of the central portion 117 may be made in addition to those mentioned above.

At the transverse end surface of the hull 10, the maximum left and right width of the lower portion 116 may be greater than or equal to the left and right width of the central portion 117. This is because the lower part 116 includes the bulbous player 114 which protrudes forward (refer to B, C, and D of FIG. 5). However, the difference between the maximum left and right widths of the lower part 116 and the left and right widths of the center part 117 may gradually increase and decrease from the front end 11a of the hull 10 toward the rear, and may disappear (see FIG. 5A). .

The maximum left and right widths of the lower part 116 may be the maximum left and right widths of the bulbous player 114. As the left and right widths of the central portion 117 are enlarged toward the rear, the center portion 117 is equal to the left and right widths of the bulbous player 114. ), The width of left and right can be increased. As a result, as shown in FIG. 5D, the left and right widths of the central portion 117 and the maximum left and right widths of the lower portion 116 are the same and may be continuously formed.

The hull 10 is provided with a plurality of liquefied gas tank 20 along the longitudinal direction, the liquefied gas tank 20 may have a longitudinal bulkhead 21 for preventing sloshing therein, the front from the rear The first liquefied gas tank 20a, the second liquefied gas tank 20b, the third liquefied gas tank 20c, and the fourth liquefied gas tank 20d may be included. At this time, the first liquefied gas tank 20a provided in the foremost of the liquefied gas tank 20 may have a form in which the left and right widths decrease from the rear end to the front end. This is because the bow 11 has a form in which the left and right widths decrease toward the front end 11a. In this case, the inclination in which the left and right widths of the first liquefied gas tank 20a decreases may be increased from the rear end of the first liquefied gas tank 20a toward the front end. For example, as shown in FIG. 3, the side surface of the first liquefied gas tank 20a may have a bent portion (not shown) that is bent twice so that the inclination angle is increased.

In the present invention, it is very important to sufficiently secure the liquefied gas storage capacity as the liquefied gas carrier 1. However, since the bow 11 has a very narrow left and right width, it is difficult to place the liquefied gas tank 20. In general, the bow 11 is between the front end 11a of the bow 11 and the front end 21a of the first liquefied gas tank 20a. Spaced apart by considerable length.

However, when the front end 21a 'of the first liquefied gas tank 20a and the front end 11a of the bow 11 are spaced apart from each other, the liquefied gas tank 20 may be installed relative to the longitudinal length of the hull 10. The length of the part that is present is reduced, which leads to a decrease in the liquefied gas storage capacity. Therefore, the present invention has improved the bow 11 as described above to solve such a reduction in the liquefied gas storage capacity.

Since the present invention also has a bulbous bow 114 and the central portion 117 between the upper deck 14 and the bulbous bow 114 may have a narrow left and right width, the first liquefied gas directly to the front end 11a of the bow 11 It is difficult to put the tank 20a. However, in the present invention, when the left and right widths of the cross section of the hull 10, in particular, the left and right widths of the central portion 117 are sufficiently enlarged, the first liquefied gas tank 20a may be adjacent to the front end 11a of the hull 10. .

Therefore, the present invention can be such that the shape of the central portion 117 has a vertical cross-section while the left and right are vertical, and at the same time, the left and right width of the central portion 117 is enlarged toward the rear.

At this point, at the point where the maximum left and right widths of the lower portion 116 and the left and right widths of the central portion 117 coincide with each other, as described above, the left and right widths of the central portion 117 may accommodate the front end 20a 'of the liquefied gas tank 20a. Since it is enlarged enough so that it may be, the front end 20a 'of the 1st liquefied gas tank 20a may be located in parallel with the said point or behind the said point.

In this case, the front and rear minimum lengths between the front end 20a 'of the first liquefied gas tank 20a and the front end 11a of the hull 10 may be between 19 and 21 m (preferably between 19.48 and 20.28 m). . This is a significant reduction compared to less than 70K liquefied gas carriers for passing through the old Panama Canal.

In addition, the present invention, the projecting length of the bulbous bow 114, so that the position where the front end (20a ') of the first liquefied gas tank 20a is placed adjacent to the front end (11a) of the hull 10 without being spaced apart a lot. Can be improved.

For example, based on the point 114a recessed rearward between the upper deck 14 and the bulbous player 114, the front and rear length from the point 114a to the front end of the bulbous player 114 is preferably 1 to 2 m (preferably). May be about 1.5m). When the front and rear lengths of the bulbous player 114 are shortened, the front and rear lengths from the front end 11a of the player 11 to the point where the maximum left and right widths of the lower part 116 coincide with the left and right widths of the center part 117 can also be shortened. have.

Therefore, the present invention reduces the separation distance from the front end 11a of the bow 11 to the front end 20a 'of the first liquefied gas tank 20a, thereby reducing the liquefied gas tank (at the longitudinal length of the hull 10). It is possible to increase the storage capacity of the liquefied gas by extending the length of the part occupied by 20).

At this time, looking at the player 11 from the side, the recessed point (114a) may be provided vertically by a certain height up and down. In addition, the front end (11a) of the bow 11 toward the upper deck 14 at the recessed point (114a) is provided to be inclined forward, the inclined angle may be 5 to 10 degrees (preferably around 7 degrees).

The front end of the bulbous bow 114 may be parallel to the front end of the upper deck 14, as shown in FIG. 1, or may protrude more than the front end of the upper deck 14. This can be variously determined according to the sea state of the area in which the liquefied gas carrier 1 according to the present invention sails.

In particular, the liquefied gas carrier 1 according to the present invention can sail the path passing through the old Panama Canal. In this case, for the passage of the old Panama Canal, the present invention may have a maximum width of the hull 10 of less than 32.3m.

By the way, a liquefied gas carrier (post panamax) that can pass through the old Panama Canal generally has a liquefied gas storage capacity of less than 70K.

However, the present invention can modify the hull 10 to have a liquefied gas storage capacity of 70K or more (preferably 78.7K) while still passing through the old Panama Canal. Hereinafter, with reference to FIGS. 7 and 8 will be described in detail.

As shown in FIG. 7 and FIG. 8, the liquefied gas carrier ship 1 is composed of a hull 10 and a liquefied gas tank 20 provided in the hull 10, and the liquefied gas carrier ship 1 is virtual. The line may be divided into an upper portion 16, a middle portion 18, and a lower portion 17. At this time, the upper portion 16, the central portion 18, the lower portion 17 is a concept that virtually divided the liquefied gas carrier (1) itself including both the hull 10 and the liquefied gas tank 20 according to the height. , It is noted that the term has a different meaning from the top 115, the center 117, and the bottom 116 used when describing the athlete 11.

Before describing the upper part 16, the central part 18, and the lower part 17 which make up the liquefied gas carrier 1, the additional components of the liquefied gas carrier 1 (top side tank 30, double bottom) The form of the tank 40 etc.) and the hull 10 (especially the side shell 13 among shells) are demonstrated in detail.

In the present invention, the top side tank 13 of the liquefied gas carrier ship 1 may be provided with a top side tank 30 at the top and a double bottom tank 40 at the bottom. .

At this time, both the top side tank 30 and the double bottom tank 40 can be used as a ballast tank, the top side tank 30 is located above the double bottom tank 40, the liquefied gas In order to stably adjust the draft of the carrier ship 1, the ballast water may be filled in the double bottom tank 40 in preference to the topside tank 30.

The top side tank 30 may be provided at a point where the upper end of the side shell plate 13 and the side end of the upper deck 14 meet, and may have a substantially triangular cross section. In order to prevent interference with the topside tank 30, the upper edge of the liquefied gas tank 20 may be inclined, and may be spaced apart from the topside tank 30 and the liquefied gas tank 20.

* At this time, one side of the top side tank 30 facing each other and / or one side of the liquefied gas tank 20 is provided with an anti-floating choke 31 is the liquefied gas tank when seawater is introduced into the hull 10 ( 20) can be prevented from floating.

The top side tanks 30 are provided in pairs on the left and right sides with respect to the center of the hull 10, and the pair of top side tanks 30 are centered to cross the transverse center of the hull 10. It may be connected by the horizontal member (32). The central horizontal member 32 may be provided to overlap the topside tank 30 to supplement the strength of the inner end of the topside.

The double bottom tank 40 allows the bottom 15 to have a double partition structure, so that even if the bottom 15 is damaged, seawater can be prevented from immediately flowing into the space where the liquefied gas tank 20 is provided.

One surface 40a of the double bottom tank 40 connected to the side shell plate 13 may be an inclined surface inclined in a direction opposite to the one surface 30a facing the liquefied gas tank 20 in the topside tank 30. In this case, in order to prevent interference between the double bottom tank 40 and the liquefied gas tank 20, the bottom edge of the liquefied gas tank 20 may be inclined to be inclined. In addition, the liquefied gas tank 20 and the double bottom tank 40 may be spaced apart.

The side shell 13 may be provided in a single hull to surround the liquefied gas tank 20. That is, when the side shell plate 13 is pierced from the side, seawater may directly flow into the space where the liquefied gas tank 20 is provided. However, the liquefied gas carrier 1 of the present invention may be to carry LPG having a higher storage temperature than LNG, and the liquefied gas tank 20 may have safety even if it is surrounded by a single side shell plate 13. .

The side shell 13 and the liquefied gas tank 20 may be spaced apart by a predetermined interval. The space may be filled with an inert gas such as nitrogen to prevent fire and explosion in case of leakage of liquefied gas.

In detail, the side shell plate 13 may surround the liquefied gas tank 20 in a state in which the side shell plate 13 is spaced apart from the liquefied gas tank 20 by 1.4 m (preferably 1.482 m) or more. In addition, in order to reinforce the strength of the side shell plate 13, a stiffener 131 may be provided on the inner surface of the side shell plate 13 in a vertical direction.

The side shell plate 13 may have a vertically vertical shape in the cross section, and the side surface of the liquefied gas tank 20 adjacent to the side shell plate 13 may also have a vertical shape in the cross section. Therefore, in this portion, the liquefied gas tank 20 may have a constant left and right width.

In the end, the liquefied gas tank 20 is enlarged from the top to the bottom of the liquefied gas tank (the part adjacent to the topside tank 30) and then remains constant by a certain height (a part surrounded only by the side shell plate 13). ) May be reduced in size (part adjacent to the double bottom tank 40).

Since the liquefied gas tank 20 can be accommodated between the left side shell plate 13 on the left side and the right side shell plate 13 on the right side, the larger the interval (width of the hull 10) between the pair of side shell plates 13 is, The storage capacity of the liquefied gas tank 20 may be increased. However, since the present invention may have a width for passing through the old Panama Canal, the distance between the pair of side shell plate 13 is limited to within 32.3m, the width of the liquefied gas tank 20 may also be limited.

However, the present invention can increase the storage capacity of the liquefied gas tank 20 while increasing the height of the liquefied gas tank 20 to implement the liquefied gas carrier ship 1 of 70K or more (preferably 78.7K). This will be described in detail below based on the upper part 16, the central part 18, and the lower part 17 forming the liquefied gas carrier ship 1.

The upper part 16 is a part including the upper deck 14. The upper portion 16 may be a portion including a lower portion of the topside tank 30 downward from the upper deck 14. At this time, the lower end of the upper part 16 is to the height of the lower point of the lower end of the top side tank 30 and the upper end of the part (right and left side vertical part) which is the largest left and right width in the liquefied gas tank 20. Can be.

The upper part 16 may include a dome (not shown) provided on the upper deck 14 to flow in and out the liquefied gas from the liquefied gas tank 20, and may be installed on the upper deck 14. Configurations (engine casings, cabins, etc.) can all be included. However, for the sake of convenience, the overall height of the upper portion 16 may be used as a height except for components installed on the upper deck 14 and protruding upward.

The lower part 17 may be a part including the bottom 15, and may include a concept from the bottom 15 to the upper end of the double bottom tank 40. At this time, the upper end of the lower portion 17, the upper end of the double bottom tank 40 and the height of the relatively high point of the lower end of the portion (left and right side vertical portion) is the maximum width of the left and right width in the liquefied gas tank 20 Can be.

In this case, the total height of the lower part 17 is the lower end of the portion where the height from the bottom 15 to the upper end of the double bottom tank 40 and the left and right widths of the liquefied gas tank 20 at the bottom 15 are maximum. It can mean the higher of the height.

*

The central part 18 is a part provided between the upper part 16 and the lower part 17, and the left-right side surface of the liquefied gas tank 20 is provided vertically. That is, the central portion 18 may include a portion in which the left and right widths of the liquefied gas tank 20 are kept constant.

In addition, the side shell plate 13 may be vertically provided between at least the bottom of the top side tank 30 and the top of the double bottom tank 40, and the center side 18 may have a top side tank 30 at the side shell plate 13. And the double bottom tank 40 are not installed, a part of the side shell plate 13 included in the central portion 18 may be provided vertically.

The central portion 18 has a larger vertical length than the upper portion 16 and the lower portion 17, and in particular, the central portion 18 is the sum of the upper and lower lengths of the upper portion 16 and the entire upper and lower lengths of the lower portion 17. It can have a height greater than.

This is because the liquefied gas carrier 1 of the present invention extends up and down the center portion 18 while having a width through which the old Panama Canal can pass. Specifically, referring to FIG. 8, the liquefied gas carriers which are less than 70 K and which can pass through the old Panama Canal can be divided into the upper part 16, the central part 18, and the lower part 17 as described above. (16) and the lower portion 17, while extending the center portion 18 up and down while maintaining the same vertical length to increase the total height of the hull 10, 70K or more (preferably 78.7K) liquefied gas Secured storage.

Therefore, in the present invention, the height occupied by the central portion 18 may be relatively greater than the sum of the upper and lower lengths occupied by the upper part 16 and the upper and lower lengths occupied by the lower part 17 between the upper deck 14 and the bottom 15. have.

The present invention can be such that the height of the hull 10 is 22m to 23.5m, to have a liquefied gas storage capacity of 70K or more (preferably 78.7K).

As described above, the present embodiment may limit the width so as to pass through the old Panama Canal, but increase the central portion 18 up and down, but have a height of less than 23.5 m to have a liquefied gas storage capacity and stability of 70 K or more at the same time.

Hereinafter, the structure surrounding the liquefied gas tank 20 will be described.

Referring to FIG. 7 again, the liquefied gas carrier ship 1 according to the first embodiment of the present invention may be prepared by providing a vertical support 22, anti-rolling chokes 41 and 143, an anti-floating choke 31, and the like. The gas tank 20 can be accommodated stably.

The vertical support 22 is provided between the liquefied gas tank 20 and the ship bottom 15 to support the load of the liquefied gas tank 20. It may be provided in plurality and may be arranged symmetrically with respect to the center of the hull 10.

The anti-rolling chock 41, 143 is provided between the liquefied gas tank 20 and the bottom 15 and / or between the liquefied gas tank 20 and the upper deck 14, and the hull 10. It is possible to prevent the transverse rotational movement of the liquefied gas tank 20 when the) moves.

In addition, the present invention, of course, similar to the anti-rolling chokes 41 and 143, anti-pitching chock (anti-pitching chock) may be provided to prevent the longitudinal rotational movement of the liquefied gas tank (20).

The anti-floating chock 31 can block the floating of the liquefied gas tank 20. According to the present invention, a layer of side shell plate 13 is provided to surround the liquefied gas tank 20. When the side shell plate 13 is damaged and seawater flows into the inside, the liquefied gas tank 20 is smaller than the sea water. Because of the density, the upper deck 14 can be damaged by floating by sea water.

Therefore, the present invention provides an anti-floating choke 31 on one side facing the liquefied gas tank 20 in the top side tank 30, and when the liquefied gas tank 20 is suspended, the impact is applied to the upper deck 14 or the like. Can prevent losing.

The anti-rolling chokes 41 and 143 and the anti-floating choke 31 described above may have gaps spaced apart in a state where the liquefied gas tank 20 is stably placed. When the liquefied gas tank 20 rotates or floats, rotational movement or floating may be prevented while the spaced gap is in close contact.

The anti-rolling choke 143 may be installed in the central horizontal member 32. The central horizontal member 32 may be provided at the lower portion of the upper deck 14 so as to connect the left and right pairs of the topside tanks 30. At this time, the anti-rolling choke 143 may be installed at the lower end of the central horizontal member (32).

The central horizontal member 32 is provided to reinforce the strength of the upper deck 14 between the pair of topside tanks 30, and the reinforcing member 33 may be added. A plurality of reinforcing members 33 may be installed in parallel in a direction (vertical direction) perpendicular to the center horizontal member 32.

9 is a front sectional view of a liquefied gas carrier according to the first embodiment of the present invention.

Referring to FIG. 9, the liquefied gas carrier ship 1 according to the first embodiment of the present invention may include a manifold 50 and a drip tray 51.

The manifold 50 may be installed at a position spaced upwardly from the upper deck 14 by the support 52 and has a connecting end 50a for connection with the transfer arm 110 of the outside 100. . The connecting end 50a of the manifold 50 is in the form of a flange, and the manifold 50 may implement loading or unloading of liquefied gas through the connecting end 50a. Of course, the manifold 50 may be connected to the inside of the liquefied gas tank 20 through a separate pipe.

However, as described above, the present invention extends the upper portion 16 while extending the central portion 18 up and down to secure a storage capacity of liquefied gas of 75 K or more. In this case, the height of the manifold 50 is the upper portion 16 and the upper portion 16. It may rise together, and thus the connection end 50a of the manifold 50 may be provided in a relatively upward position than the upper and lower connectable ranges 110a of the transfer arm 110.

Therefore, in the present invention, a problem arises in that a connection between the connection end 50a of the manifold 50 and the transfer arm 110 of the outside 100 is impossible, and a step adjustment unit 53 may be provided to solve this problem. . The step adjustment unit 53 connects the connection end 50a of the manifold 50 and the transfer arm 110.

Step adjustment unit 53, one side may be connected to the connection end (50a) of the manifold 50, the other side may be connected to the transfer arm (110). As described above, since the connecting end 50a of the manifold 50 may be located above the upper and lower connectable ranges 110a of the transfer arm 110, the height of one side of the step adjusting unit 53 is the other side. It can be relatively higher than the height of.

In order to connect different heights, the step adjustment unit 53 may have a bent or curved shape at least once. For example, the step adjusting unit 53 may be S-shaped. In addition, the step control unit 53 may be provided detachably from the manifold (50).

The drip tray 51 is provided below the connection end 50a of the manifold 50 in the upper deck 14. Since the drip tray 51 is configured to collect leaks when the liquefied gas is transferred, the drip tray 51 may be provided below a portion having a high risk of leakage on the liquefied gas transfer path (such as the connection end 50a of the manifold 50). Can be.

However, in the present invention, the manifold 50 and the transfer arm 110 may be connected to each other by using the step adjusting unit 53, and the step 50a of the step adjusting unit 53 and the manifold 50 may be connected to each other. Since both the point where the step is connected and the step adjustment unit 53 and the transfer arm 110 is a high risk of liquefied gas leakage, the drip tray 51 may be installed below. That is, one side and the other side of the step adjusting unit 53 may be located above the drip tray 51.

According to the present invention, when the height of the manifold 50 is out of the vertically connectable range 110a of the transfer arm 110 while extending the center portion 18 up and down, the connection between the manifold 50 and the transfer arm 110 is performed. It is to use a step adjustment unit 53 to implement.

This is because the minimum value with respect to the height between the manifold 50 and the drip tray 51 is prescribed | regulated by classification, etc. (for example, 900 mm). That is, since the height between the connecting end 50a of the manifold 50 and the drip tray 51 should be larger than the preset reference value set by the Society, the present invention increases the drip tray 51 when the center portion 18 is extended up and down. As the height of) increases as well, the connecting end 50a of the manifold 5010 positioned above the preset reference value above the drip tray 51 is upwardly above the upper and lower connectable ranges 110a of the transfer arm 110. It will be located.

However, the height between the drip tray 51 and the other side of the step adjusting unit 53 (part connected to the transfer arm 110) may be smaller than the preset reference value. At this time, since the step adjusting unit 53 is provided to be detachable from the manifold 50, the predetermined reference value may be satisfied when the step adjusting unit 53 is separated.

10 is a sectional front view of a liquefied gas carrier according to a second embodiment of the present invention.

Referring to FIG. 10, the liquefied gas carrier ship 1 according to the second embodiment of the present invention includes a manifold 50 and a drip tray 51. Hereinafter, the description will be focused on the parts that are different in the present embodiment, and parts that are not described will be replaced with descriptions in other embodiments.

In this embodiment, the height of the drip tray 51 can be lowered in order to make the height between the manifold 50 and the drip tray 51 more than a predetermined reference value. That is, the drip tray 51 may be provided in a form recessed in the upper deck 14.

In this embodiment, the height of the drip tray 51 may be lowered so that the height of the manifold 50 is provided at or below the maximum height to which the transfer arm 110 can be connected. In this case, the drip tray 51 may have a shape recessed to protrude to the inside of the topside tank 30 while being placed on the top surface of the topside tank 30.

However, when the liquefied gas leaks into the drip tray 51, the cold heat may be transferred to the inside of the topside tank 30, so that one surface of the top side tank 30 in the direction in which the drip tray 51 is provided is at a low temperature. It may be made of a strong material (such as LT steel). This may be applied in other embodiments when installing the drip tray 51 directly to the upper deck 14 without support.

In this embodiment, the drip tray 51 is recessed so that the height of the manifold 50 is maintained while the height between the drip tray 51 and the manifold 50 is maintained above the predetermined reference value. The connection of the 110 can be made as high as possible.

11 is a front sectional view of a liquefied gas carrier according to a third embodiment of the present invention.

Referring to FIG. 11, the liquefied gas carrier ship 1 according to the third embodiment of the present invention includes a manifold 50 and a drip tray 51. In particular, the shape of the upper deck 14 is different from that of the other embodiments. Can be differentiated.

In the present embodiment, the upper deck 14 has an inclination in which the height is lowered toward both sides from the center of the hull 10, and the inclination of the portion where the connection end 50a of the manifold 50 is placed upwards is different. It can be relatively larger than the slope at.

In detail, the upper deck 14 may include a first inclined portion 141 and a second inclined portion 142. The first inclined portion 141 is a portion where the inclination is constant from the center to a predetermined portion, and the second inclined portion 142 is a portion in which the inclination is constant from the first inclined portion 141 to the side shell plate 13. In this case, the inclination of the second inclined portion 142 may be greater than the inclination of the first inclined portion 141, and the second inclined portion 142 may be connected to the first inclined portion 141 by bending or bending. .

One side of the second inclined portion 142 adjacent to the first inclined portion 141 may be positioned at the point where the topside tank 30 begins to be provided between the center and the side of the hull 10.

In addition, the second inclined portion 142 may be partially provided only at a portion where the manifold 50 is located along the longitudinal direction of the hull 10. In this case, as shown in FIG. 1, the side shell plate 13 has a height at the front or rear of the second inclined portion 142 that is connected to the second inclined portion 142 (manifold 50). May not be located, and thus may be relatively lower than the height of the second inclined portion 142).

At this time, the side shell plate 13 may have a form in which the height is inclined lower toward the portion connected to the second inclined portion 142 from the front or rear of the second inclined portion 142. That is, when the hull 10 is viewed from the side, the side shell plate 13 may have a shape recessed downward while height is lowered only at a portion where the second inclined portion 142 is provided.

The connection end 50a of the manifold 50 may be located above the second inclined portion 142, and the drip tray 51 may be provided in the second inclined portion 142. The height between the manifold 50 and the drip tray 51 can meet a predetermined reference value while the connecting end 50a of the c) is less than or equal to the connectable height of the transfer arm 110.

This is because, as the second inclined portion 142 is provided to be inclined more than the first inclined portion 141, the height of the drip tray 51 positioned on the second inclined portion 142 is relatively higher than that in other embodiments. Because it is lowered.

Therefore, the present embodiment can reduce the height of the manifold 50 while securing a storage capacity of liquefied gas of 75 K or more so that the step adjustment unit 53 can be omitted, and at the same time between the manifold 50 and the drip tray 51. The height can be more than the preset reference value to ensure safety.

As described above, the manifold 50 and the transfer arm 110 may be connected to each other while the height between the manifold 50 and the drip tray 51 is greater than or equal to a predetermined reference value through structural changes. The invention can connect the manifold 50 and the transfer arm 110 by adjusting the draft of the hull (10).

The liquefied gas carrier 1 according to the present invention includes a rear peak tank 121 at the stern 12, the rear peak tank 121 is empty when the manifold 50 is connected to the transfer arm 110. It is common to maintain state.

However, in the present invention, the fluid is introduced into the rear peak tank 121 to connect the connection end 50a of the manifold 50 and the transfer arm 110 of the outside 100 to the hull 10. Can increase the draft. In this case, the connecting end 50a of the manifold 50 may be placed relatively above the maximum height that the transfer arm 110 can connect.

In other words, in the present invention, as the height between the manifold 50 and the drip tray 51 is greater than or equal to the preset reference value while the center portion 18 is extended, the connecting end 50a of the manifold 50 is moved by the transfer arm ( When disposed at a height that is difficult to connect with the 110, the fluid may be introduced into the rear peak tank 121 to connect the manifold 50 and the transfer arm 110.

In this case, as the draft of the hull 10 increases, the connecting end 50a of the manifold 50 may be lowered so that the transfer arm 110 is positioned below the maximum height that can be connected.

Therefore, in the present invention, even if the connecting end 50a of the manifold 50 is provided at a position higher than the transfer arm 110, instead of the structural change or with the structural change, the manifold ( 50 may be stably connected with the transfer arm (110).

Of course, while filling the rear peak tank 121 to adjust the draft, the top side tank 30 and the double bottom tank 40 also flows inside the draft can be adjusted, but the rear peak tank 121 Even if fluid is introduced into the topside tank 30 and the double bottom tank 40 except for), the connecting end 50a of the manifold 50 may be positioned above the height to which the transfer arm 110 can be connected. have. That is, the present invention can implement the connection of the manifold 50 and the transfer arm 110 by using the rear peak tank 121.

12 is a side view of a liquefied gas carrier ship according to a fourth embodiment of the present invention.

Referring to FIG. 12, the liquefied gas carrier 1 according to the fourth embodiment of the present invention includes a maintenance store 111, a sunken deck 122, and a collision barrier bulkhead 113.

The maintenance store 111 is provided in the player 11 and acts as a warehouse for storing various items. Since the maintenance store 111 is the first place to be damaged when an impact is applied to the front end of the upper deck 14, a material having a high risk may not be disposed therein.

Sunken deck 122 (sunken deck) is provided on the stern 12 is provided with equipment for mooring. The sunken deck 122 is a portion exposed to the outside 100, and may allow the stern 12 to be moored by a winch or the like placed on the sunk deck 122.

The sunk deck 122 may be provided to have a step with the upper deck 14. That is, the sunken deck 122 may be positioned relatively lower than the maximum height of the upper deck 14. In this case, the height at which the sunken deck 122 is provided may be the height of the freeboard deck.

The collision barrier rib 113 is provided below the maintenance store 111 in the horizontal direction of the ship body 10. The collision barrier bulkhead 113 is made of a thicker and / or higher strength member than other parts, and may be provided to protect the rear components (such as the liquefied gas tank 20) from the impact applied to the bow 11. have.

A front peak tank 112 may be further included between the barrier rib 113 and the bow 11, and the front peak tank 112 may be a tank for storing ballast water such as seawater. The front peak tank 112 may be used when the manifold 50 is connected to the transfer arm 110 together with the rear peak tank 121 described above.

According to the rules of the Society, the top height of the bulkhead 113 against the collision should be relatively higher than the height of the freeboard deck. However, when the height of the sunken deck 122 is higher than the lower surface of the maintenance store 111, as shown in FIG. There is a problem that the rear of the 111 must also be provided as a collision barrier 113.

However, when the height of the sunken deck 122 is lower than the lower surface of the maintenance store 111 as shown in FIG. 12B, since all of the maintenance store 111 are positioned higher than the height of the freeboard deck, It is not necessary to provide the rear surface as a barrier 113 for collision.

In this case, it is sufficient that the barrier rib 113 is provided from the bottom of the ship 15 to the bottom of the maintenance store 111. That is, in the present embodiment, the collision barrier rib 113 may have a planar shape vertically provided from the bottom 15 to the bottom surface of the maintenance store 111.

Through such a configuration, the present embodiment can minimize the costly bulkhead 113 that is made of a thick and high-strength material, thereby reducing the overall manufacturing cost.

Although the present invention has been described in detail through specific examples, it is intended to describe the present invention in detail, and the present invention is not limited thereto, and should be understood by those skilled in the art within the technical spirit of the present invention. It is obvious that the modifications and improvements are possible.

Simple modifications and variations of the present invention all fall within the scope of the present invention, and the specific scope of protection of the present invention will be apparent from the appended claims.

1: liquefied gas carrier 10: hull
11: Player 12: Stern
13: side shell 14: upper deck
15: bottom 16: upper
17: lower part 18: center part
20: liquefied gas tank 50: manifold
100: outer 110: transfer arm

Claims (7)

In the liquefied gas carrier ship having a width of less than 32.3m that can pass through the old Panama Canal and includes a plurality of liquefied gas tank provided along the longitudinal direction of the hull,
Installed on the upper deck and loading or unloading the liquefied gas, the hull extends the center portion up and down to increase the total height of the hull while moving up the upper portion including the upper deck to secure a storage capacity of liquefied gas more than 70K As such, the connecting end is located above the vertically connectable height of the external transfer arm;
A ballast tank including a topside tank provided at an upper end of the hull and a double bottom tank provided at a lower end of the hull; And
Including a front peak tank provided in the bow of the hull,
The bow includes an upper part, a center part and a lower part,
The upper portion is provided to be inclined forward 5 to 10 degrees from the lower end to the upper end,
The center portion has a form in which the left and right are vertically vertical and the left and right widths are enlarged from the front end of the hull to the rear,
The lower part is a shape having a spherical bow protruding 1 to 2 m from the front end of the central portion,
The front and rear lengths between the first liquefied gas tank located in front of the plurality of liquefied gas tanks, and the front end of the central portion is 19 to 21m,
The upper deck of the hull in the upper portion is in the form of ascending toward the front end from a specific position in front of the first liquefied gas tank,
The ballast water tank, when the connection end of the manifold and the transfer arm is connected to the fluid flows inside to increase the draft of the hull,
The connecting end of the manifold is located above the connectable height of the transfer arm even when fluid enters the ballast water tank.
The front peak tank, the fluid is introduced into the ballast water tank in the state that the fluid is introduced to further increase the draft of the hull so that the connecting end of the manifold is located at the vertically connectable height of the transfer arm Liquefied gas carrier, characterized in that. The method of claim 1,
Liquefied gas carrier ship, characterized in that the front and rear minimum length between the front end of the liquefied gas tank and the front end of the hull is smaller than the height of the hull. The method of claim 1,
Liquefied gas carrier ship, characterized in that the maximum left and right width of the lower portion in the transverse end surface of the hull is more than the left and right width of the central portion. The method of claim 3, wherein
The difference between the maximum left and right width of the lower portion and the left and right width of the center portion, the liquefied gas carrier ship characterized in that gradually increases and decreases toward the rear from the front end of the hull. The method of claim 4, wherein
The front end of the liquefied gas tank placed in the foremost, liquefied gas carrier ship, characterized in that parallel to or behind the point where the maximum left and right width of the lower portion and the left and right width of the central portion coincides. The method of claim 1,
Liquefied gas carrier ship, characterized in that the front and rear length from the point recessed rearward between the upper deck and the bulb bow is 1 to 2m. The method of claim 6, wherein the shear of the bulbous athlete,
Liquefied gas carrier ship, characterized in that parallel to the front end of the upper deck.

Images