KR102305882B1 - liquefied gas carrier - Google Patents

Abstract

A liquefied gas carrier according to the present invention, in a liquefied gas carrier including a liquefied gas tank for storing liquefied gas, is provided on the outside and includes: and a plurality of stiffeners provided in a vertical direction on the side shell plate and arranged in parallel with each other, wherein the stiffeners form a polygonal flat cross-section together with the side shell plate by a predetermined height to form a fluid storage space inside the stiffener. characterized by forming

Description

liquefied gas carrier

The present invention relates to a liquefied gas carrier.

LPG, which is a liquefied petroleum gas, is a fuel liquefied by cooling or pressurizing gas components ejected together with crude oil from an oil field during oil extraction.

Liquefied petroleum gas is easy to liquefy and vaporize, and its volume decreases when it changes from gas to liquid. The boiling point of liquefied petroleum gas is about -42°C, and when liquefied petroleum gas is liquefied at room temperature, propane is reduced to 1/260 in volume and butane is 1/230 in volume, so storage and transportation are convenient.

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

On the other hand, a ship supporting the liquefied gas storage tank may sail along various routes, and when a canal exists on the route of the ship, the specifications of the ship may be limited according to the size of the canal.

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

In order for a vessel to pass through the Old Panama Canal, the width is limited as above. In this case, the total capacity of liquefied gas that can be loaded on the vessel is limited. For safe operation of the vessel, the total capacity of liquefied gas is around 60K. Only the 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 capable of further increasing cargo capacity while passing through the old Panama Canal.

A liquefied gas carrier according to an aspect of the present invention is a liquefied gas carrier including a liquefied gas tank for storing liquefied gas, comprising: a ship side outer plate provided on the outside and surrounding the liquefied gas tank in one layer; and a plurality of stiffeners provided in a vertical direction on the side shell plate and arranged in parallel with each other, wherein the stiffeners form a polygonal flat cross-section together with the side shell plate by a predetermined height to form a fluid storage space inside the stiffener. characterized by forming

Specifically, the stiffener may have a polygonal flat cross-section with one side open.

Specifically, the stiffener may be coupled to the side shell plate so that the one side opened in the flat cross-section is sealed by the side shell plate.

Specifically, the stiffener may store ballast water in the fluid storage space.

Specifically, a topside tank may be installed at an upper end of the ship side shell plate, a double bottom tank may be installed on a lower end of the ship side shell plate, and the stiffener may be provided between the topside tank and the double bottom tank.

Specifically, the stiffener may have an upper end connected to the topside tank and a lower end connected to the double-bottom tank to form the fluid storage space between the topside tank and the double-bottom tank.

Specifically, the fluid storage space of the stiffener may communicate with the top-side tank or the double-bottom tank.

The liquefied gas carrier according to the present invention can secure a liquefied gas storage capacity of 70K or more by deforming the hull shape while having a width that can pass through the old Panama Canal, and structural stability by improving the linearity and internal structure etc. can be improved.

1 is a side view of a liquefied gas carrier according to the present invention.
Figure 2 is a plan view of a liquefied gas carrier according to the present invention.
3 is a plan cross-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.
Fig. 5 is a cross-sectional view taken from A to D of Fig. 1;
Figure 6 is a front sectional view showing overlapping cross-sections of the liquefied gas carrier according to the present invention.
7 is a front cross-sectional view of a liquefied gas carrier according to a first embodiment of the present invention.
8 is a planar cross-sectional exploded view of a liquefied gas carrier according to the present invention.
9 is a front cross-sectional view of the liquefied gas carrier according to the first embodiment of the present invention.
10 is a front cross-sectional view of a liquefied gas carrier according to a second embodiment of the present invention.
11 is a front cross-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 according to a fourth embodiment of the present invention.
13 is a front cross-sectional view of a liquefied gas carrier according to a fifth embodiment of the present invention.
14 and 15 are internal perspective views of a liquefied gas carrier according to a sixth embodiment of the present invention.
16 is a front cross-sectional view of a liquefied gas carrier according to a seventh embodiment of the present invention.
17 is an internal perspective view of a liquefied gas carrier according to a seventh embodiment of the present invention.
18 is a front cross-sectional view of a liquefied gas carrier according to an eighth embodiment of the present invention.
19 is a front cross-sectional view of a liquefied gas carrier according to a ninth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present invention, liquefied gas may be used to encompass 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. A side view of the bow of a liquefied gas carrier.

In addition, FIG. 5 is a cross-sectional view in A to D of FIG. 1, and FIG. 6 is a front cross-sectional view showing overlapping cross-sections of a liquefied gas carrier according to the present invention.

In addition, Figure 7 is a front sectional view of the liquefied gas carrier according to the first embodiment of the present invention, Figure 8 is a planar cross-sectional exploded view of the liquefied gas carrier according to the present invention.

1 to 8, the liquefied gas carrier 1 according to the first embodiment of the present invention is accommodated in the hull 10 and the hull 10 and a plurality of along the longitudinal direction of the hull 10 The dog is provided and includes a liquefied gas tank 20 for storing 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, when viewed in the transverse direction, the upper deck 14 is provided at the upper end, the side shell plates 13 are provided on both left and right sides, and the lower end can be defined as the ship bottom 15 .

Hereinafter, in the present specification, forward or rear means the front or rear in the longitudinal direction (longitudinal direction) of the hull 10, and left and right are left (port) or right (starboard) in the width direction (transverse direction) of the hull 10. Note that it means

The bow 11 of the hull 10 may be provided with a spherical bow 114 . The spherical bow 114 is a spherical structure that protrudes forward in order to reduce wave wave resistance, and the upper side of the spherical bow 114 may be provided by being depressed to the rear.

That is, a rearwardly depressed point is formed between the ball bow 114 and the upper deck 14, and a waterline may be located at this point. In this case, the wave of the bow 11 flows along the side shell plate 13 while being split along the surface of the bulbous bow 114 at this point.

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

The upper part 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, since the upper deck 14 may have an inclination that decreases in height from the center of the hull 10 to both sides, the shape of the upper part 115 in cross section may be a rhombus shape. For reference, the inclination of the upper deck 14 may be constant from the front end 11a of the hull 10 to the rear. Here, the front end (11a) may be to cover the front end (11a) between the upper end and the lower end of the hull 10 when viewed from the side.

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

The lower part 116 may include a portion in which the ball bow 114 is provided upward from the ship bottom 15 . The lower portion 116 may have an enlarged left and right width compared to the central portion 117 , which is due to the cross-sectional shape of the spherical bow 114 .

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

The central part 117 has a constant left and right width between the upper end and the lower end, and the left and right width is enlarged from the front end 11a of the hull 10 toward the rear (D->C->B->A in FIG. 5) may be in the form Also, the central portion 117 may have a variable height toward the rear from the front end 11a of the hull 10 . Specifically, the central portion 117 may have a form in which the height of the upper end gradually increases and then lowers toward the rear from the front end 11a of the hull 10, and the height of the lower end gradually increases. Of course, the height change of the upper end and the lower end of the central portion 117 may be variously made in addition to the above-mentioned.

In the transverse end face 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 portion 116 includes the bulbous bow 114 protruding forward (see B, C, and D of FIG. 5 ). However, the difference between the maximum left and right width of the lower part 116 and the left and right width of the central part 117 may disappear as it gradually increases and decreases from the front end 11a of the hull 10 to the rear (see FIG. 5A). .

The maximum left and right width of the lower part 116 may be the maximum left and right width of the ball bow 114, and as the left and right width of the central part 117 expands toward the rear, the central part 117 is equal to the left and right width of the ball bow 114. ) can be enlarged left and right. In the end, 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.

A plurality of liquefied gas tanks 20 are provided in the hull 10 along the longitudinal direction, and the liquefied gas tank 20 may have a longitudinal bulkhead 21 for preventing sloshing therein, and is formed from the front to the rear. It may include one liquefied gas tank 20a, a second liquefied gas tank 20b, a third liquefied gas tank 20c, and a fourth liquefied gas tank 20d. In this case, the first liquefied gas tank 20a provided at the front of the liquefied gas tank 20 may have a shape in which the left and right widths decrease from the rear end to the front end. This is because the bow 11 has a shape in which the left and right widths decrease toward the front end 11a. In this case, the slope at which the left and right widths of the first liquefied gas tank 20a decrease may be in the form of increasing from the rear end to the front end of the first liquefied gas tank 20a. For example, as shown in FIG. 3 , the side surface of the first liquefied gas tank 20a may have a bent portion (not shown) bent twice to increase the inclination angle.

In the present invention, it is very important to sufficiently secure a liquefied gas storage capacity as a liquefied gas carrier (1). However, the bow 11 is difficult to put the liquefied gas tank 20 because the left and right width is very narrow, generally between the front end (11a) of the bow (11) and the front end (21a) of the first liquefied gas tank (20a) They were spaced apart by a 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 can be installed compared to the longitudinal length of the hull 10 The length of the part is reduced, which causes a decrease in the storage capacity of the liquefied gas. Therefore, the present invention has improved the bow 11 as described above in order to solve this decrease in liquefied gas storage capacity.

The present invention also has a spherical bow 114 and the central portion 117 between the upper deck 14 and the spherical bow 114 may have a narrow left and right width, so the first liquefied gas directly at the front end 11a of the bow 11 It is difficult for the tank 20a to be placed. 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 part 117 are sufficiently enlarged, the first liquefied gas tank 20a may be adjacent to the front end 11a of the hull 10. .

Therefore, according to the present invention, the shape of the central portion 117 can be made to have a cross-section having a constant left and right width while the left and right sides are vertical, and at the same time, the left and right widths of the central portion 117 can be enlarged toward the rear.

At this time, at the point where the maximum left and right widths of the lower part 116 and the left and right widths of the central part 117 coincide, the left and right widths of the central part 117 can accommodate the front end 20a' of the liquefied gas tank 20a as described above. Since it is enlarged enough to be able to, the front end (20a') of the first liquefied gas tank (20a) may be located in parallel with the point or behind the point.

In this case, the front and rear minimum length 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 significantly reduced compared to liquefied gas carriers of less than 70K for passing through the Old Panama Canal.

In addition, the present invention, in order to be adjacent to the front end (11a) of the hull 10 and the front end (11a) of the hull 10 at the position where the front end (20a') of the first liquefied gas tank (20a) is placed, the protrusion length of the spherical bow (114) can be improved

For example, based on the point 114a recessed backward between the upper deck 14 and the bulbous bow 114, the front and rear length from the corresponding point 114a to the front end of the bulbous bow 114 is 1 to 2m (preferably is about 1.5 m). If the front and rear length of the ball bow 114 is shortened, the front and rear length from the front end 11a of the bow 11 to the point where the maximum left and right widths of the lower part 116 and the left and right widths of the central part 117 coincide 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), the liquefied gas tank (20) in the longitudinal length of the hull (10) ) can increase the storage capacity of liquefied gas by increasing the length of the part that can be occupied.

At this time, when the player 11 is viewed 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, and 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 , or may protrude more than the front end of the upper deck 14 , as shown in FIG. 1 . This may be determined in various ways according to the sea conditions 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 navigate a route through the old Panama Canal. In this case, the maximum width of the hull 10 may be less than 32.3m in the present invention for the passage of the old Panama Canal.

However, liquefied gas carriers that can pass through the old Panama Canal (post panamax) generally have a liquefied gas storage capacity of less than 70K.

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

7 and 8, the liquefied gas carrier 1 is composed of a hull 10 and a liquefied gas tank 20 provided in the hull 10, and the liquefied gas carrier 1 is a virtual It can be divided into an upper part 16, a central part 18, and a lower part 17 by a line. At this time, the upper part 16, the central part 18, and the lower part 17 are a concept in which the liquefied gas carrier 1 itself including the hull 10 and the liquefied gas tank 20 is virtually divided according to the height. , Note that the term has a different meaning from the upper 115, central 117, and lower 116 used when describing the player 11.

Prior to dividing the upper 16, central 18, and lower 17 constituting the liquefied gas carrier 1, additional components (topside tank 30, double bottom) of the liquefied gas carrier 1 are described. The shape of the tank 40, etc.) and the hull 10 (especially the side shell plate 13 among the shell plates) will be described in detail.

In the present invention, a top side tank 30 (Top Side Tank) is installed at the top of the ship side shell plate 13 of the liquefied gas carrier 1, and a double bottom tank 40 (Double Bottom Tank) may be installed at the bottom. .

At this time, both the topside tank 30 and the double-bottom tank 40 may be used as a water ballast tank. Since the topside tank 30 is located above the double-bottom tank 40 , the liquefied gas In order to stably adjust the draft of the carrier 1 , the double bottom tank 40 may be filled with ballast water preferentially than the topside tank 30 .

The topside 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 inclinedly chamfered, and the topside tank 30 and the liquefied gas tank 20 may be spaced apart.

At this time, an anti-floating choke 31 is installed on one surface of the topside tank 30 and/or one surface of the liquefied gas tank 20 facing each other so that when seawater flows into the hull 10, the liquefied gas tank 20 ) can be prevented from floating.

The topside tank 30 is provided as a pair on each left and right with respect to the center of the hull 10 , and the pair of topside tanks 30 are centrally provided to cross the lateral center of the hull 10 . It may be connected by a lateral member (32). The central cross 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 has the ship bottom 15 having a double bulkhead structure, so that even if the ship bottom 15 is damaged, seawater can be prevented from directly 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 outer plate 13 may be an inclined surface inclined in the opposite direction to the surface 30a facing the liquefied gas tank 20 in the topside tank 30, , At this time, in order to prevent interference between the double-bottom tank 40 and the liquefied gas tank 20 , the lower edge of the liquefied gas tank 20 may be in the form of being slanted. In addition, the liquefied gas tank 20 and the double-bottom tank 40 may be spaced apart.

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

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

Specifically, the side shell plate 13 may surround the liquefied gas tank 20 in a state in which it 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 vertical vertical shape in a cross section, and the side surface of the liquefied gas tank 20 adjacent to the ship side shell plate 13 may also have a vertical vertical shape in the transverse section. Therefore, in this part, the liquefied gas tank 20 may have a constant left and right width.

After all, the liquefied gas tank 20 has a left and right width that is expanded from the top to the bottom (a portion adjacent to the topside tank 30) and then maintained constant by a certain height (a portion surrounded only by the side shell plate 13) ) may be reduced again (a portion adjacent to the double-bottom tank 40).

Since the liquefied gas tank 20 can be accommodated between the side shell plate 13 on the left side and the side shell plate 13 on the right side, the larger the gap (width of the hull 10) between the pair of side shell plates 13 is, the larger the 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 plates 13 is limited to within 32.3 m, so the left and right widths of the liquefied gas tank 20 may also be limited.

However, the present invention can implement the liquefied gas carrier 1 of 70K or more (preferably 78.7K) by increasing the storage capacity of the liquefied gas tank 20 while increasing the height of the liquefied gas tank 20 . Hereinafter, it will be described in detail based on the upper portion 16, the central portion 18, and the lower portion 17 constituting the liquefied gas carrier (1).

The upper part 16 is a part including the upper deck 14 . The upper portion 16 may be a portion including the lower end height of the topside tank 30 downward from the upper deck 14 . At this time, the lower end of the upper part 16 is up to the height of the relatively low point among the lower end of the topside tank 30 and the upper end of the part with the largest left and right width in the liquefied gas tank 20 (the part with the left and right sides vertical) can

The upper portion 16 may include a dome (not shown) provided on the upper deck 14 for the inflow and outflow of liquefied gas from the liquefied gas tank 20, and other that may be installed on the upper deck 14 It may include all components (engine casing, cabin, etc.). However, for convenience, in this specification, the overall height of the upper part 16 may be used as a height excluding the components installed on the upper deck 14 and protruding upward.

The lower part 17 is a part including the ship bottom 15 , and may be a concept including the upper end of the double bottom tank 40 from the ship bottom 15 . At this time, the upper end of the lower part 17 is up to the height of the relatively high point among the upper end of the double-bottom tank 40 and the lower end of the part with the largest left and right width in the liquefied gas tank 20 (left and right sides are vertical) can

In this case, the total height of the lower part 17 is the height from the ship bottom 15 to the upper end of the double bottom tank 40 and the lower end of the part where the left and right widths of the liquefied gas tank 20 in the ship bottom 15 are maximum. It may mean the largest of the heights up to.

The central part 18 is provided between the upper part 16 and the lower part 17 and is a part in which the left and right side surfaces of the liquefied gas tank 20 are 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, at least between the lower end of the topside tank 30 and the upper end of the double-bottom tank 40, the side shell plate 13 may be provided vertically, and in the central part 18, the topside tank 30 from the side shell plate 13 ) and a portion where the double bottom tank 40 is not installed, a portion of the side shell plate 13 included in the central portion 18 may be provided vertically.

The central part 18 has a relatively large vertical length compared to the upper part 16 and the lower part 17, and in particular, the central part 18 is the sum of the upper and lower lengths of the upper part 16 and the total upper and lower lengths of the lower part 17. It may have a greater height.

This is because the liquefied gas carrier (1) of the present invention has a width that allows passage of the old Panama Canal while extending the central portion (18) up and down. Specifically, referring to FIG. 8, the liquefied gas carrier that is less than 70K and can pass through the Old Panama Canal is divided into an upper part 16, a central part 18, and a lower part 17, as described above, and the present invention is the upper part (16) and the lower part 17 by increasing the total height of the hull 10 by extending only the central part 18 vertically while maintaining the same vertical length, 70K or more (preferably 78.7K) of liquefied gas Storage capacity was secured.

For this reason, in the present invention, the height occupied by the central portion 18 can be relatively larger than the sum of the vertical length occupied by the upper portion 16 and the vertical length occupied by the lower portion 17 between the upper deck 14 and the ship bottom 15 . have.

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

As such, the present embodiment limits the width to pass through the Old Panama Canal, but increases the central portion 18 up and down to have a height of 23.5 m or less so as to have a liquefied gas storage capacity of 70K or more and stability at the same time.

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

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

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

Anti-rolling chokes 41 and 143 (anti-rolling chock) are 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 ) can block the lateral rotational movement of the liquefied gas tank 20 when it moves.

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

The anti-floating choke 31 (anti-floating chock) may prevent the liquefied gas tank 20 from floating. In the present invention, a single layer of the ship side shell plate 13 is provided to surround the liquefied gas tank 20. When the ship side shell plate 13 is damaged and seawater flows into the interior, the liquefied gas tank 20 is smaller than the seawater. Since it has a density, it can float by seawater and damage the upper deck 14 .

Therefore, the present invention provides an anti-floating choke 31 on one side facing the liquefied gas tank 20 in the topside tank 30, and when the liquefied gas tank 20 floats, an impact is applied to the upper deck 14, etc. loss can be prevented.

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

The anti-rolling choke 143 may be installed on the central transverse member 32 . The central transverse member 32 may be provided under the upper deck 14 to connect the pair of left and right top side tanks 30 . In this case, the anti-rolling choke 143 may be installed at the lower end of the central transverse member 32 .

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

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

Referring to FIG. 9 , the liquefied gas carrier 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 upward from the upper deck 14 by the support 52 , and has a connection 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, in the present invention, the upper portion 16 is raised while extending the central portion 18 up and down to secure a liquefied gas storage capacity of 75K or more. In this case, the height of the manifold 50 is the upper portion 16 and Together, the connecting end 50a of the manifold 50 may be provided relatively higher than the upper and lower connectable range 110a of the transfer arm 110 .

Therefore, in the present invention, there is a problem in that it is impossible to connect between the connecting end 50a of the manifold 50 and the transfer arm 110 of the outside 100, and to solve this problem, a step control unit 53 can be provided. . The step control unit 53 connects the connecting end 50a of the manifold 50 and the transfer arm 110 .

The step control unit 53 may have one side connected to the connection end 50a of the manifold 50 and the other side connected to the transfer arm 110 . As described above, since the connecting end 50a of the manifold 50 may be located relatively higher than the upper and lower connectable range 110a of the transfer arm 110 , the height of one side of the step control unit 53 is the other side. may be relatively higher than the height of

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

The drip tray 51 is provided below the connecting end 50a of the manifold 50 in the upper deck 14 . Since the drip tray 51 is configured to collect leaks during transport of the liquefied gas, it is to be provided below a portion with a high risk of leakage (such as the connection end 50a of the manifold 50) on the liquefied gas transport path. can

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

In the present invention, when the height of the manifold 50 is out of the upper and lower connectable range 110a of the transfer arm 110 while extending the central portion 18 up and down, the connection of the manifold 50 and the transfer arm 110 is It is to use the step difference control unit 53 to implement.

This is because the minimum value for the height between the manifold 50 and the drip tray 51 is stipulated by the classification (eg 900 mm). That is, since the height between the connecting end 50a of the manifold 50 and the drip tray 51 must be greater than the above preset reference value set by the classification, the present invention provides the drip tray 51 when the central part 18 is vertically stretched. ) as the height also rises, the connection end 50a of the manifold 510 located above the preset reference value or higher than the drip tray 51 is higher than the upper and lower connectable range 110a of the transfer arm 110. will be located

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

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

Referring to FIG. 10 , the liquefied gas carrier 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 from the present embodiment, and the omitted parts will be replaced with descriptions in other embodiments.

In this embodiment, the height of the drip tray 51 may be lowered so that the height between the manifold 50 and the drip tray 51 is greater than or equal to a preset reference value. That is, the drip tray 51 may be provided in the form of being depressed in the upper deck 14 .

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

However, when liquefied gas leaks into the drip tray 51 , cold heat can be transferred to the inside of the topside tank 30 , so the one surface in the direction in which the drip tray 51 is provided in the topside tank 30 is at low temperature. It may be made of a strong material (eg, LT steel, etc.). This may be applied when the drip tray 51 is directly installed on the upper deck 14 without a support in another embodiment below.

As described above, in this embodiment, the height of the manifold 50 is increased while maintaining the height between the drip tray 51 and the manifold 50 above a preset reference value by making the drip tray 51 in a recessed form. The connection of 110 can be made to be as high as possible.

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

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

In this embodiment, the upper deck 14 has an inclination that decreases in height from the center of the hull 10 to both sides, and the inclination of the portion where the connecting end 50a of the manifold 50 is placed on the upper side is different. may be relatively larger than the slope at

Specifically, 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 having a constant inclination from the center to a predetermined portion, and the second inclined portion 142 is a portion having a constant inclination from the first inclined portion 141 to the side shell plate 13 . In this case, the inclination of the second inclined part 142 may be greater than that of the first inclined part 141 , and the second inclined part 142 may be connected to the first inclined part 141 while being bent or bent. .

One side adjacent to the first inclined portion 141 in the second inclined portion 142 may be placed at a point where the topside tank 30 starts to be provided between the center and the ship side of the hull 10 .

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

In this case, the side outer plate 13 may have a shape in which the height is inclinedly lowered toward the portion connected to the second inclined part 142 from the front or rear of the second inclined part 142 . That is, when the hull 10 is viewed from the side, the side shell plate 13 may have a lowered height only at the portion where the second inclined portion 142 is provided, and may have a downwardly depressed shape.

The connecting end 50a of the manifold 50 is positioned above the second inclined portion 142 and the drip tray 51 may be provided on the second inclined portion 142 . In this embodiment, the manifold 50 ), the height between the manifold 50 and the drip tray 51 may satisfy a preset reference value while making the connection end 50a of the transfer arm 110 less than the connectable height.

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

Therefore, in this embodiment, the height of the manifold 50 is lowered while securing the liquefied gas storage capacity of 75K or more so that the step control unit 53 can be omitted, and at the same time, between the manifold 50 and the drip tray 51 . Safety can be ensured by setting the height to be greater than or equal to the preset reference value.

Through the structural change as described above, the manifold 50 and the transfer arm 110 can be connected while the height between the manifold 50 and the drip tray 51 is greater than or equal to a preset reference value, and/or this 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, and the rear peak tank 121 is empty when the manifold 50 is connected with the transfer arm 110. It is common to keep the status quo.

However, in the present invention, the fluid is introduced into the rear peak tank 121 in order to connect the connecting 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 positioned relatively higher than the maximum height connectable to the transfer arm 110 .

That is, in the present invention, as the height between the manifold 50 and the drip tray 51 is greater than or equal to a preset reference value while increasing the central portion 18, the connecting end 50a of the manifold 50 is moved to the transfer arm 110 ), it is possible to introduce a fluid into the rear peak tank 121 in order to connect the manifold 50 and the transfer arm 110 when it is disposed at a height difficult to connect.

In this case, as the draft of the hull 10 increases, the connecting end 50a of the manifold 50 may descend so that the transfer arm 110 is relatively lower than the connectable maximum height.

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

Of course, along with adjusting the draft by filling the rear peak tank 121 with a fluid, the fluid flows into the topside tank 30 and the double bottom tank 40 to adjust the draft, but the rear peak tank 121 ), even if the fluid flows into the inside of the topside tank 30 and the double-bottom tank 40, the connecting end 50a of the manifold 50 can be placed above the height at 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 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 line store 111 , a sunken deck 122 , and a bulkhead 113 for collision.

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

A sunken deck 122 (sunken deck) is provided in the stern 12 and equipment for mooring is provided. The sunken deck 122 is a portion exposed to the outside 100 , and the mooring of the stern 12 may be made by a winch placed on the sunken deck 122 .

The sunken deck 122 may be provided to have a step difference with the upper deck 14 . That is, the sunken deck 122 may be located 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-preparation bulkhead 113 is provided in the transverse direction of the hull 10 below the boat store 111 . The bulkhead 113 against collision is made of a member thicker and/or stronger than other parts, and may be provided to protect the rear components (liquefied gas tank 20, etc.) from the impact applied to the bow 11. have.

A front peak tank 112 may be further included between the collision preparedness bulkhead 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 connecting the manifold 50 to the transfer arm 110 together with the rear peak tank 121 described above.

According to the rules of classification and the like, the height of the upper end of the bulkhead 113 for 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 shipbuilding store 111 as shown in FIG. There is a problem in that the rear surface of the 111) also has to be provided as the collision-preparing bulkhead 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. There is no need to provide the rear surface as the collision-preparing bulkhead 113 .

In this case, it is sufficient if the collision-preparation bulkhead 113 is provided from the ship bottom 15 surface to the lower surface of the auxiliary ship store 111 . That is, in the present embodiment, the anti-collision bulkhead 113 may have a planar shape provided vertically from the bottom of the ship 15 to the lower surface of the ship store 111 .

Through such a configuration, the present embodiment can reduce the overall manufacturing cost by minimizing the expensive collision-preparing bulkhead 113 that must be made of a thick and high-strength material.

13 is a front cross-sectional view of a liquefied gas carrier according to a fifth embodiment of the present invention.

Hereinafter, with reference to FIG. 13, a description will be given mainly of parts different from the first embodiment in the fifth embodiment.

Referring to FIG. 13 , in the liquefied gas carrier 1 according to the present embodiment, the central transverse member 32 may be provided on the upper deck 14 . As the central transverse member 32 is provided on the upper part of the upper deck 14, the anti-rolling choke 143 between the upper deck 14 and the upper surface of the liquefied gas tank 20 is installed directly on the lower surface of the upper deck 14. can Of course, the reinforcing member 33 may also be provided in the central transverse member 32 located above the upper deck 14 .

In this embodiment, by arranging the central transverse member 32 on the upper part of the upper deck 14, the anti-rolling choke 143 is directly installed on the lower surface of the upper deck 14, so that the upper deck 14 and the liquefied gas tank ( 20) It is possible to additionally secure a space between the upper surfaces, and by using this, it is possible to make the upper surface of the liquefied gas tank 20 higher than in the first embodiment.

For example, the upper surface of the liquefied gas tank 20 may be provided higher than the height of the upper end of one surface of the topside tank 30 on which the anti-floating choke 31 is provided. Therefore, the present invention can increase the liquefied gas storage capacity by raising the upper surface of the liquefied gas tank 20 closer to the upper deck 14 .

However, in the case of the first embodiment, the central transverse member 32 is directly connected to the topside tank 30 to reinforce the strength, whereas in this embodiment, the central transverse member 32 and the topside with the upper deck 14 interposed therebetween. As the tank 30 is indirectly connected, the strength may vary. In this embodiment, the lower surface of the central transverse member 32 is provided to at least partially overlap the upper surface of the topside tank 30 with the upper deck 14 interposed therebetween, thereby ensuring strength.

As such, in this embodiment, the central transverse member 32 connecting the pair of topside tanks 30 is disposed on the upper surface of the upper deck 14, and the height of the liquefied gas tank 20 is further raised to store liquefied gas. capacity can be expanded.

14 and 15 are internal perspective views of a liquefied gas carrier according to a sixth embodiment of the present invention.

In the case of the first embodiment, a stiffener 131 is provided in the vertical direction on the inner surface of the side shell plate 13 in order to reinforce the strength of the one-ply side shell plate 13 surrounding the liquefied gas tank 20 .

However, in the process of building the liquefied gas carrier 1, a member on which a person can stand must be provided to inspect the outer surface of the liquefied gas tank 20, so the inspection platform (not shown) is a stiffener ( 131) and may be installed in the horizontal direction. In this case, the chieftain for inspection is temporarily installed and can be removed later.

In this embodiment, since the stiffener 131 is provided in the vertical direction, when the side shell plate 13 is connected by welding by inter-block welding, the welding flame may fall along the space between the two stiffeners 131 . At this time, if the welding flame touches the insulating material such as polyurethane installed on the outer surface of the liquefied gas tank 20, it may lead to a fire and cause a serious accident.

Accordingly, the present invention includes a sixth embodiment for solving these problems. Hereinafter, parts different from the first embodiment in the sixth embodiment will be described in detail with reference to FIGS. 14 and 15 .

14 and 15 , the liquefied gas carrier 1 according to the sixth embodiment of the present invention may include a stiffener 131 , a deck stringer 132 , and a vertical web 133 .

The stiffener 131 is composed of a plurality, is provided on the side shell plate 13, and may be arranged parallel to each other. The stiffener 131 may be provided in a vertical direction to the side shell plate 13 as shown in FIG. 14 or may be provided in a horizontal direction to the side shell plate 13 as shown in FIG. 15 .

The deck stringer 132 is provided in the horizontal direction on the side shell plate 13, and is vertically disposed with the stiffener 131 as shown in FIG. 14, or in parallel with the stiffener 131 as shown in FIG. can be placed.

In this embodiment, as the deck stringer 132 is installed on the side shell plate 13, the deck stringer 132 can implement the role of the chieftain for inspection. Therefore, in the present embodiment, since there is no need to separately install and dismantle the chieftain for inspection, man-hours can be reduced.

In addition, the deck stringer 132 may serve to block the welding spark from falling. Therefore, it is possible to reduce the risk that the welding spark generated when the side shell plate 13 is connected when the blocks are welded falls downward to cause a fire.

In the case of FIG. 14 , since the stiffener 131 and the deck stringer 132 are arranged in a lattice form, the strength can be significantly improved due to the installation of the deck stringer 132 . Conversely, instead of increasing the strength, the lateral width of the stiffener 131 may be made smaller than that of the first embodiment. This leads to the effect of reducing the cost incurred when the stiffener 131 is installed.

However, even in the case of FIG. 15 , since the stiffener 131 and the vertical web 133 are arranged in a lattice form, the lateral width of the stiffener 131 may be reduced and the manufacturing cost may be reduced.

Accordingly, the lateral width of the stiffener 131 may be relatively small compared to the lateral width of the vertical web 133 of the deck stringer 132 .

The vertical web 133 is provided in a vertical direction to the side shell plate 13 , and is vertically disposed with the deck stringer 132 . A hole (not shown) may be provided in the vertical web 133 , which is intended to allow passage of a person moving along the deck stringer 132 .

The vertical web 133 may be disposed parallel to the stiffener 131 as in the case of FIG. 14 , and may be disposed perpendicular to the stiffener 131 as in the case of FIG. 15 .

The transverse width of the vertical web 133 may match the transverse width of the deck stringer 132 . That is, in this embodiment, the deck stringer 132 and the vertical web 133 are provided in a grid, and through this, the number and/or lateral width of the stiffeners 131 are reduced, thereby reducing the manufacturing cost and at the same time the hull 10 of the hull 10 . The total load can be reduced.

16 is a front sectional view of a liquefied gas carrier according to a seventh embodiment of the present invention, and FIG. 17 is an internal perspective view of a liquefied gas carrier according to a seventh embodiment of the present invention.

16 and 17, the liquefied gas carrier 1 according to the seventh embodiment of the present invention, the shape of the stiffener 131 may be differentiated from other embodiments. Hereinafter, the present embodiment will be mainly described in terms of differences from other embodiments.

A plurality of stiffeners 131 may be provided in a vertical direction to the side shell plate 13 and may be disposed in parallel to each other. At this time, the stiffener 131 may form a polygonal flat cross-section together with the side shell plate 13 by a predetermined height.

The stiffener 131 may have a polygonal flat cross-section with one side open. In this case, the stiffener 131 may be coupled to the side shell plate 13 so that one side open in the flat cross-section is sealed by the side shell plate 13 . .

Therefore, a space confined by a certain height may be formed by the combination of the stiffener 131 and the side shell plate 13 , and the space may be a fluid storage space for storing ballast water. That is, the stiffener 131 may form a fluid storage space therein while being coupled to the ship side outer plate 13 .

In this case, the present embodiment may additionally secure a space in which the ballast water can be stored, and/or reduce the size of another space in which the ballast water can be stored.

For example, in this embodiment, the size of the topside tank 30 and/or the double-bottom tank 40 can be reduced compared to other embodiments, and the liquefied gas tank 20 while reducing the height of the topside tank 30 It is possible to increase the storage capacity of liquefied gas by increasing the height of the

The stiffener 131 may have an upper end connected to the topside tank 30 and a lower end connected to the double-bottom tank 40 . Accordingly, the stiffener 131 may form a fluid storage space between the topside tank 30 and the double bottom tank 40 .

At this time, the fluid storage space may be in communication with the topside tank 30 and/or the double bottom tank 40 . Alternatively, it may be connected to control communication by a valve (not shown) or the like.

18 is a front cross-sectional view of a liquefied gas carrier according to an eighth embodiment of the present invention.

Referring to FIG. 18 , the liquefied gas carrier 1 according to the eighth embodiment of the present invention may include an anti-rolling choke 134 provided in the stiffener 131 .

The anti-rolling chokes 41 and 143 are provided between the upper end of the liquefied gas tank 20 and the upper deck 14, and between the lower end of the liquefied gas tank 20 and the ship bottom 15, as described in the first embodiment above. can be

However, in this embodiment, the anti-rolling choke 134 is provided on the stiffener 131 installed on the side shell plate 13, and between the upper end of the liquefied gas tank 20 and the upper deck 14 and/or the liquefied gas tank ( 20), the anti-rolling chokes 41 and 143 between the bottom of the ship and the bottom 15 can be omitted.

In this case, since the upper end of the liquefied gas tank 20 is more elevated under the upper deck 14 , it may be possible to increase the storage capacity of the liquefied gas tank 20 .

The anti-rolling choke 134 provided in the stiffener 131 may be provided at a position relatively close to the ship bottom 15 between the upper deck 14 and the ship bottom 15 . In addition, in this embodiment, the anti-rolling choke 134 may be provided on the vertical web 133 described above.

Any one of the vertical supports 22 provided at the lower end of the liquefied gas tank 20 may be provided in the center of the transverse direction of the liquefied gas tank 20, and the remaining vertical supports 22 are based on the center of the transverse direction. may be provided symmetrically.

In the case of the first embodiment, as the anti-rolling choke 41 is centered in the transverse direction between the lower end of the liquefied gas tank 20 and the ship bottom 15, the vertical support 22 is in the transverse direction of the liquefied gas tank 20. The center could not be supported.

However, in this embodiment, it is possible to support the load in the center of the transverse direction of the liquefied gas tank 20, so that the number of vertical supports 22 can be reduced (for example, from 4 to 3 based on one end face in the transverse direction) dog).

Therefore, in the present embodiment, the anti-rolling chokes 134 are provided in the stiffener 131 to omit the anti-rolling chokes 41 and 143 provided above and below the liquefied gas tank 20, and the vertical support 22 is disposed It is possible to reduce the number of vertical supports 22 while changing .

In addition, this embodiment can increase the storage capacity by raising the upper end of the liquefied gas tank 20 closer to the upper deck 14 by omitting the anti-rolling choke 143 from the upper end of the liquefied gas tank 20 .

19 is a front cross-sectional view of a liquefied gas carrier according to a ninth embodiment of the present invention.

Referring to FIG. 19 , the liquefied gas carrier 1 according to the ninth embodiment of the present invention includes a side shell plate 13 , an upper deck 14 , and a topside tank 30 . Hereinafter, differences between the present embodiment compared to other embodiments will be mainly described.

The upper deck 14 is connected to the upper end of the side shell plate 13 and may have an inclined portion 144 inclined upward toward the center. However, the inclined portion 144 may be spaced apart from the point where the side shell plate 13 and the upper deck 14 meet.

At least a portion of the topside tank 30 may be located above the point where the side shell plate 13 and the upper deck 14 are connected. In this embodiment, the upper deck 14 has a shape that sufficiently protrudes upward as it has the inclined portion 144, and through this, a topside tank ( 30) can be made to protrude upward.

The topside tank 30 protrudes outward at the point where the side shell plate 13 and the upper deck 14 are connected (the upper edge of the side in the cross section of the hull 10), and the inclined portion 144 of the upper deck 14 It may have a shape that is depressed inward at the starting point.

The topside tank 30 includes a lower space 34 provided below and an upper space 35 provided above based on the point where the side shell plate 13 and the upper deck 14 are connected, and the lower space It may have a maximum width in the transverse direction at the point where 34 and the upper space 35 are connected. In addition, the lower space 34 and the upper space 35 may be in communication.

At this time, the communication between the lower space 34 and the upper space 35 means that there is no structure between the lower space 34 and the upper space 35, or a structure exists but a hole is formed in the structure to communicate. covers

The upper space 35 of the topside tank 30 may be provided on a lower surface of the inclined portion 144 . The inclined portion 144 starts from a position closer to the center of the hull 10 than the connection point between the side shell plate 13 and the upper deck 14, and between the left and right pair of inclined portions 144, the upper deck 14 is relatively It may be flat or inclined to the degree of inclination of the upper deck 14 in other embodiments.

As the topside tank 30 includes the upper space 35 protruding upward by the inclined portion 144 , the lateral width of the topside tank 30 is the width of the hull 10 from the side shell plate 13 . It can be enlarged towards the center.

A central transverse member 32 is provided between the pair of topside tanks 30. In this embodiment, the central transverse member 32 may have a relatively reduced transverse width compared to other embodiments. Therefore, this embodiment can reduce the installation cost by reducing the size of the central lateral member (32).

In this embodiment, while the upper deck 14 is greatly inclined upward, the upper end of the liquefied gas tank 20 can also have a shape that rises upward. In this case, the slope of the upper edge in the liquefied gas tank 20 may be greater than the slope of the lower edge.

Although the present invention has been described in detail through specific examples, this is for the purpose of describing the present invention in detail, and the present invention is not limited thereto, and by those of ordinary skill in the art within the technical spirit of the present invention. It will be clear that the transformation or improvement is possible.

All simple modifications and variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

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

Claims (7)

In a liquefied gas carrier including a liquefied gas tank for storing liquefied gas,
a ship side outer plate provided on the outside and surrounding the liquefied gas tank in one layer; and
It includes a plurality of stiffeners provided in a vertical direction to the side shell plate and arranged parallel to each other,
The stiffener forms a polygonal flat cross-section together with the ship-side outer plate by a certain height to form a fluid storage space inside the stiffener,
The stiffener is
One side has an open polygonal flat cross-section, and the one side open in the flat cross-section is coupled to the ship-side shell plate so that it is sealed by the ship-side shell plate, and a plurality of A liquefied gas carrier, characterized in that it is arranged to be spaced apart from each other along the longitudinal direction of the hull. delete delete According to claim 1, wherein the stiffener,
Liquefied gas carrier, characterized in that storing the ballast water in the fluid storage space. The method of claim 1,
A topside tank is installed on the upper end of the side shell plate, and a double bottom tank is installed on the lower end of the ship side shell plate,
The stiffener is a liquefied gas carrier, characterized in that provided between the top-side tank and the double-bottom tank. According to claim 5, wherein the stiffener,
A liquefied gas carrier, characterized in that the upper end is connected to the topside tank and the lower end is connected to the double-bottom tank to form the fluid storage space between the topside tank and the double-bottom tank. The method of claim 6, wherein the fluid storage space of the stiffener,
Liquefied gas carrier, characterized in that in communication with the top-side tank or the double-bottom tank.

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