KR101822730B1 - liquefied gas carrier - Google Patents

Abstract

A liquefied gas carrier according to the present invention is a liquefied gas carrier having a width of less than 32.3 m so as to allow passage of an old Panama canal, comprising: a manifold for loading or unloading liquefied gas; And a rear peak tank provided at the stern, wherein the rear peak tank lowers the draft of the hull by flowing fluid into the manifold so that the manifold is located in a vertically connectable range of the external transfer arm.

Description

Liquefied gas carrier}

The present invention relates to a liquefied gas carrier.

LPG, which is a liquefied petroleum gas, is a liquefied fuel that is cooled or pressurized by a gas component that is ejected along with crude oil in an oil field during petroleum extraction, and is characterized by having propane and butane as the main components and having a higher calorific value than the other fuels.

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

Liquefied petroleum gas is transported by vessels (especially LPG carriers) from production to consumption. At this time, the vessel has a plurality of liquefied gas storage tanks, and the liquefied gas storage tanks can receive liquefied petroleum gas in a low temperature liquid state.

On the other hand, a ship supporting a liquefied gas storage tank can navigate along various routes. If a canal exists on the route of the ship, the specification of the ship may be restricted depending on the size of the canal.

For example, if a ship must pass through the old Panama Canal, the width of the ship can not exceed 32.3m, and the vessel that can pass through the old Panama Canal is called panamax. However, the new Panama Canal has been opened up to a width of 49m, and the ship that can pass through the new Panama Canal is called new panamax. The existing Panamax is called post panamax .

In this case, the total capacity of the liquefied gas that can be loaded on the ship is limited, so that the total capacity of the liquefied gas is about 60 K Only the carrier was operating.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquefied gas carrier which can further increase the cargo capacity while passing through the old Panama canal.

A liquefied gas carrier according to one aspect of the present invention is a liquefied gas carrier having a width of less than 32.3 m to permit passage of an old Panama canal, comprising: a manifold for loading or unloading liquefied gas; And a rear peak tank provided at the stern, wherein the rear peak tank lowers the draft of the hull by flowing fluid into the manifold so that the manifold is located in a vertically connectable range of the external transfer arm.

Specifically, it includes a liquefied gas tank for storing liquefied gas, and the rear peak tank may be empty when the liquefied gas tank is filled with the liquefied gas.

Specifically, the manifold may be located outside the vertically connectable range of the transfer arm.

Specifically, when the fluid flows into the interior of the rear peak tank, the manifold can be lowered to fall within a vertically connectable range of the transfer arm.

Specifically, the hull includes a hull for accommodating the liquefied gas tank, and the outer shell of the hull can be formed as a single hull.

Specifically, a topside tank may be installed at an upper end of the shell plate, and a double bottom tank may be installed at a lower end of the shell plate.

Specifically, when the manifold is connected to the transfer arm, fluid flows into the topside tank and the double bottom tank to reduce the draft of the hull.

Specifically, even if fluid flows into the inside of the topside tank and the double bottom tank except for the rear peak tank, the manifold may be positioned above the connectable range of the transfer arm relatively.

The liquefied gas carrier according to the present invention can secure a liquefied gas storage capacity of 70 K or more by modifying the hull shape while having a width capable of passing through the old Panama canal and also improving the linearity and internal structure, And the like 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 according to the present invention;
3 is a top cross-sectional view of a liquefied gas carrier according to the present invention.
4 is a side view of a player of a liquefied gas carrier according to the present invention.
5 is a cross-sectional view taken along line A-D in Fig.
6 is a front cross-sectional view of a cross section of a liquefied gas carrier according to the present invention overlaid.
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 section exploded view of a liquefied gas carrier according to the present invention.
9 is a front cross-sectional view of a liquefied gas carrier according to a 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 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;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present invention, the liquefied gas may be used to mean a liquefied petroleum gas, a liquefied natural gas, or the like.

Fig. 1 is a side view of a liquefied gas carrier according to the invention, Fig. 2 is a plan view of a liquefied gas carrier according to the invention, Fig. 3 is a top section view of a liquefied gas carrier according to the invention, It is a side view of the player of the liquefied gas carrier.

Fig. 5 is a cross-sectional view taken along line A-D in Fig. 1, and Fig. 6 is a cross-sectional front view showing cross-sectional views of the liquefied gas carrier according to the present invention.

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

1 to 8, a liquefied gas carrier 1 according to a first embodiment of the present invention includes a hull 10, and a plurality of liquefied gas carriers 1, which are accommodated in the hull 10 and extend along a longitudinal direction of the hull 10, And a liquefied gas tank 20 for storing the liquefied gas.

The ship 10 has a bow 11 on the front side in the longitudinal direction and a stern 12 on the rear side. Further, the upper deck 14 may be provided at the upper end when viewed in the lateral direction, the side outer sheath 13 may be provided at both the left and right sides, and the lower end may be defined as the bottom 15.

In the present specification, the front or rear means forward or rearward in the longitudinal direction (longitudinal direction) of the hull 10, and the left and right sides refer to the left side (the port side) or the right side (right side) In the case of

The bow 11 of the hull 10 may be provided with a bulb 114. The spherical forehead 114 is a spherical structure protruded forward to reduce the wave resistance, and the upper side of the spherical forehead 114 may be recessed rearward.

That is, between the spherical ridge 114 and the upper deck 14, a point depressed rearward is formed, and the waterline may be located at this point. In this case, the fore-aft wave 11 flows at this point along the side shell 13 while being split along the surface of the bulb 114.

5 and 6, the bow 11 of the hull 10 according to the present invention has an upper portion 115, a lower portion 116, a middle portion 117 ). The lower portion 116 means a certain portion upward from the bottom 15 and the middle portion 117 means the upper portion 115 and the lower portion 116, .

The upper portion 115 of the bow 11 may include a portion of the upper deck 14 that decreases downward in width from the upper deck 14. At this time, the upper deck 14 may have a slope that decreases in height from the center of the hull 10 to both sides, so that the shape of the upper portion 115 in the transverse section may be rhombic. The inclination of the upper deck 14 may be constant from the front end 11a of the hull 10 backward. Here, the front end 11a may include the front end 11a between the upper end and the lower end of the hull 10 as viewed from the side.

The height of the upper portion 115, that is, the height from the upper deck 14 to the lower portion of the upper portion 115, can be varied from front to rear. Therefore, the height of the center portion 117 can also be changed from forward to backward.

The lower portion 116 may include a portion where the bulb 114 is provided upward from the bottom 15. The lower portion 116 may have an enlarged width in the lateral direction relative to the center portion 117, which is due to the sectional shape of the spherical prong 114.

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

The central portion 117 has a width in the left and right direction between the upper end and the lower end and is widened in the lateral direction from the front end 11a of the hull 10 to the rear side (D-> C-> B-> A in FIG. 5) Lt; / RTI > In addition, the height of the center portion 117 can be varied from the front end 11a of the hull 10 toward the rear. Specifically, the center portion 117 may have a shape in which the height of the upper end gradually increases and decreases from the front end 11a of the hull 10 toward the rear, and the height of the lower end gradually increases. Of course, the height change of the upper and lower ends of the central portion 117 may be variously changed in addition to those mentioned above.

The maximum width of the lower portion 116 may be equal to or greater than the width of the center portion 117 in the transverse direction of the hull 10. This is because the lower portion 116 includes a bulb 114 protruding forward (refer to B, C, and D in Fig. 5). The difference between the maximum lateral width of the lower portion 116 and the lateral width of the central portion 117 may gradually become larger and smaller as the distance from the front end 11a of the hull 10 becomes smaller (see A in FIG. 5) .

The maximum width of the lower portion 116 may be the maximum width of the spherical bowler 114. The width of the bow portion 114 increases as the width of the central portion 117 increases toward the rear. Can be increased. 5 (D), the left and right widths of the center portion 117 and the bottom portion 116 are the same and can be continuous.

A plurality of liquefied gas tanks 20 are provided along the longitudinal direction of the hull 10. The liquefied gas tank 20 may have longitudinal partition walls 21 for preventing sloshing therein, 1 liquefied gas tank 20a, a second liquefied gas tank 20b, a third liquefied gas tank 20c, and a fourth liquefied gas tank 20d. At this time, the first liquefied gas tank 20a provided at the foremost one of the liquefied gas tanks 20 may have a shape in which the width of the first liquefied gas tank 20a decreases from the rear end to the front end. This is because the width of the bow 11 decreases toward the front end 11a. In this case, the inclination at which the left-right width of the first liquefied gas tank 20a is reduced may become larger toward the front end from the rear 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.

It is very important for the present invention to secure sufficient liquefied gas storage capacity as the liquefied gas carrier 1. Generally, the front end 11a of the bow 11 and the front end 21a of the first liquefied gas tank 20a are located between the front end 11a and the front end 11a of the first liquefied gas tank 20a, It was 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 separated from each other, the liquefied gas tank 20 can be installed relative to the longitudinal length of the ship 10 The length of the portion where the liquefied gas is stored is reduced, resulting in a reduction in the storage capacity of the liquefied gas. Therefore, the present invention improves the bow 11 as described above to overcome such a reduction in the liquefied gas storage capacity.

The present invention also has the spherical bow 114 and the central portion 117 between the upper deck 14 and the spherical bow 114 can have a narrow lateral width so that the front end 11a of the bow 11 can be directly fed with the first liquefied gas It is difficult for the tank 20a to be placed. However, in the present invention, the first liquefied gas tank 20a can be made adjacent to the front end 11a of the hull 10 when the transverse width of the transverse section of the hull 10 is sufficiently enlarged, particularly the lateral width of the central portion 117 .

Therefore, in the present invention, the shape of the central portion 117 is such that the left and right sides are vertical, the lateral width is constant, and the width of the central portion 117 is increased toward the rear.

The left and right widths of the central portion 117 accommodate the front ends 20a 'of the liquefied gas tanks 20a at the points where the maximum width of the lower portion 116 coincides with the width of the width of the central portion 117 The front end 20a 'of the first liquefied gas tank 20a may be positioned in parallel with or behind the point.

In this case, the minimum longitudinal 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 substantially reduced compared to less than 70K liquefied gas carriers to pass the old Panama Canal.

In order to make 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 too far apart, Can be improved.

For example, the forward and backward length from the point 114a to the front end of the spherical forehead 114 with respect to the point 114a that is recessed backward between the upper deck 14 and the spherical forehead 114 is 1 to 2 m May be about 1.5 m). The front and rear length from the front end 11a of the bow 11 to the point where the maximum width of the lower portion 116 coincides with the width of the width of the center portion 117 can be shortened have.

Therefore, the present invention can reduce the separation distance from the front end 11a of the bow 11 to the front end 20a 'of the first liquefied gas tank 20a, so that the length of the liquefied gas tank 20 ) Can be increased to increase the liquefied gas storage capacity.

At this time, when viewed from the side of the bow 11, the depressed point 114a may be vertically provided up and down by a predetermined height. Also, the front end 11a of the bow 11 is inclined forward from the depressed point 114a toward the upper deck 14. The angle of inclination may be 5 to 10 degrees (preferably 7 degrees or so).

1, the front end of the spherical forehead 114 may be flush with the front end of the upper deck 14 or may protrude more than the front end of the upper deck 14. [ This can be variously determined depending on the sea condition of the area where the liquefied gas carrier 1 according to the present invention is navigated.

In particular, the liquefied gas carrier 1 according to the present invention can navigate the path 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 less than 32.3 m.

However, it is common for post panamax to pass through the old Panama Canal to have 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 at least 70K, preferably 78.7K, while passing through the old Panama Canal. Hereinafter, a detailed description will be made with reference to FIG. 7 and FIG. 8.

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 like. The liquefied gas carrier 1 is a virtual The upper portion 16, the middle portion 18, and the lower portion 17 by a line. At this time, the upper part 16, the central part 18 and the lower part 17 are concepts in which the liquefied gas carrier 1 itself including both the ship 10 and the liquefied gas tank 20 is virtually divided in height The middle portion 117 and the lower portion 116 which are used in describing the player 11 and the player 11, respectively.

Before describing the upper portion 16, the central portion 18 and the lower portion 17 constituting the liquefied gas carrier 1 in detail, the additional components of the liquefied gas carrier 1 (the top side tank 30, The tank 40 and the like) and the hull 10 (particularly the side plate 13 and the like of the outer plates) will be described in detail.

In the present invention, a top side tank 30 (Top Side Tank) may be installed at an upper end and a double bottom tank 40 may be installed at a lower end of the side outside plate 13 of the liquefied gas carrier 1 .

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

The topside tank 30 may be provided at a position where the upper end of the side shell plating 13 meets the side end of the upper deck 14 and may have a substantially triangular cross section. The top edge of the liquefied gas tank 20 may be obliquely shaved to prevent interference with the topside tank 30 and may be spaced apart from the topside tank 30 and the liquefied gas tank 20.

At this time, anti-floating chocks 31 are provided on one surface of the top side tank 30 facing each other and / or on one surface of the liquefied gas tank 20, and when the seawater flows into the inside of the hull 10, Can be prevented from floating.

The topside tanks 30 are provided on the left and right sides with respect to the center of the hull 10 and the pair of top side tanks 30 are provided at the center of the hull 10, May be connected by a transverse member (32). The central transverse member 32 is provided to overlap with the top side tank 30 to compensate for the strength of the inside end of the top side.

The double bottom tank 40 can prevent the seawater from being directly introduced into the space where the liquefied gas tank 20 is provided even if the bottom 15 is broken by making the bottom 15 of the double bottom tank 40 have a double partition structure.

The one surface 40a of the double bottom tank 40 connected to the side shell plate 13 may be an inclined surface inclined in the opposite direction to the one 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 bottom edge of the liquefied gas tank 20 may be sloped. Further, the liquefied gas tank 20 and the double bottom tank 40 may be spaced apart from each other.

The side shell 13 may be provided in a single hull to surround the liquefied gas tank 20. [ That is, when the side shell 13 is pierced from the side, the seawater can be directly introduced into the space where the liquefied gas tank 20 is provided. However, since the liquefied gas carrier 1 of the present invention may transport LPG having a high storage temperature compared with the LNG, the liquefied gas tank 20 may have safety even if it is enclosed by a single side of the side shell 13 .

The side shell plate 13 and the liquefied gas tank 20 may be spaced apart from each other by a predetermined distance. An inert gas such as nitrogen may be filled in the separated space to prevent fire and explosion when the liquefied gas is leaked.

Specifically, the side shell plates 13 may surround the liquefied gas tank 20 while being spaced apart from the liquefied gas tank 20 by at least 1.4 m (preferably 1.482 m). In order to reinforce the strength of the side shell 13, a stiffener 131 may be provided on the inner surface of the side shell 13 in a direction perpendicular to the side.

The side shell plate 13 may have a vertical up-and-down shape in the transverse section, and the side surface of the liquefied gas tank 20 adjacent to the side shell plate 13 may also be vertically vertical in the transverse section. Therefore, the width of the liquefied gas tank 20 may be constant in this portion.

As a result, the liquefied gas tank 20 is kept constant by a predetermined height after the width of the liquefied gas tank 20 is increased from the upper end to the lower end (a portion adjacent to the top side tank 30) (the portion surrounded by the side outer shell 13 ) (The portion adjacent to the double bottom tank 40).

The liquefied gas tank 20 can be accommodated between the left side side outer shell 13 and the right side side shellboard 13 so that the larger the gap between the pair of side shells 13 (the width of the shell 10) The storage capacity of the liquefied gas tank 20 can be increased. However, since the present invention can 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 that the lateral width of the liquefied gas tank 20 can also be limited.

However, the present invention can realize 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, the upper portion 16, the central portion 18 and the lower portion 17 of the liquefied gas carrier 1 will be described in detail.

The upper portion 16 is a portion including the upper deck 14. The upper portion 16 may be a portion including the lower portion of the top side tank 30 downward from the upper deck 14. At this time, the lower end of the upper portion 16 is connected to a lower portion of the top side tank 30 and a portion of the upper portion of the liquefied gas tank 20 having the greatest left and right width .

The upper portion 16 may include a dome (not shown) provided on the upper deck 14 to allow the liquefied gas to flow in and out of the liquefied gas tank 20, Configurations (engine casing, cabin, etc.). For the sake of convenience, in the present specification, the total height of the upper portion 16 may be used as a height of the upper deck 14 except for the upward protruding portions.

The lower portion 17 is a portion including the bottom 15 and may be a concept including 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 is connected to the upper end of the double bottom tank 40 and to the height of a relatively higher point of the lower end of the portion having the greatest width in the left and right (vertical left and right side portions) .

The total height of the lower portion 17 refers to the height from the bottom 15 to the upper end of the double bottom tank 40 and the height from the bottom 15 to the bottom portion of the liquefied gas tank 20, Which is a height of the height from the top to the bottom.

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

The side shell plate 13 may be vertically provided at least between the lower end of the topside tank 30 and the upper end of the double bottom tank 40. The center shell 18 may be provided with a top side tank 30 And the double bottom tank 40 are not provided, a part of the side shell plate 13 included in the central portion 18 may be provided vertically.

The central portion 18 has a relatively large vertical length with respect to the upper portion 16 and the lower portion 17. Particularly, the central portion 18 is formed by combining the vertical length of the upper portion 16 and the entire vertical length of the lower portion 17 It is possible to have a height larger than the height.

This is because the liquefied gas carrier 1 of the present invention extends up and down the central portion 18 with a width allowing passage through the old Panama Canal. Specifically, referring to FIG. 8, the liquefied gas carrier, which is less than 70 K and capable of passing through the old Panama Canal, is divided into an upper portion 16, a middle portion 18 and a lower portion 17 as described above. The total height of the hull 10 is increased by extending the central portion 18 upwardly and downwardly while maintaining the vertical lengths of the lid 16 and the lower portion 17 to be equal to or greater than 70 K (preferably 78.7 K) Storage capacity was secured.

The height occupied by the central portion 18 is relatively larger than the sum of the upper and lower lengths occupied by the upper portion 16 and the upper and lower lengths occupied by the lower portion 17 between the upper deck 14 and the bottom 15, have.

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

Thus, in this embodiment, the width of the central portion 18 is increased upwards and downwards, and the height of the liquefied gas storage capacity of 70 K or more and stability can be achieved simultaneously.

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

7, the liquefied gas carrier 1 according to the first embodiment of the present invention includes a vertical support 22, anti-rolling chocks 41 and 143, anti-floating chocks 31, The gas tank 20 can be stably accommodated.

A vertical support 22 is provided between the liquefied gas tank 20 and the bottom 15 and supports the load of the liquefied gas tank 20. And may be arranged symmetrically with respect to the center of the hull 10.

The anti-rolling chocks 41 and 143 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, The lateral movement of the liquefied gas tank 20 can be prevented.

It should be understood that the present invention may also be provided with an anti-pitching chock to inhibit the longitudinal rotational movement of the liquefied gas tank 20, similar to the anti-rolling chocks 41, 143.

The anti-floating chock 31 can prevent floating of the liquefied gas tank 20. The present invention is characterized in that a single side side shell plate 13 surrounds the liquefied gas tank 20. When the side shell plate 13 is broken and seawater flows into the inside of the liquefied gas tank 20, So that the upper deck 14 can be damaged by flooding with seawater.

Accordingly, the present invention is characterized in that the anti-floating chock 31 is provided on one side of the top side tank 30 facing the liquefied gas tank 20, and when the liquefied gas tank 20 floats, Can be prevented.

The anti-rolling chocks 41 and 143 and the anti-floating chock 31 described above can be spaced apart from each other in a state where the liquefied gas tank 20 is stably placed. However, when the liquefied gas tank 20 rotates or floats, the spaced apart gaps are closely contacted, and rotational motion or floating can be prevented.

The anti-rolling chocks 143 may be installed in the central transverse member 32. The central transverse member 32 may be provided at the lower portion of the upper deck 14 so as to connect the pair of left and right topside tanks 30. At this time, the anti-rolling chocks 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 top side tanks 30, and a reinforcing member 33 can be added. A plurality of reinforcing members 33 may be provided parallel to each other in a direction (longitudinal direction) perpendicular to the central transverse member 32.

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, a drip tray 51, and the like.

The manifold 50 can be installed at a position spaced upward from the upper deck 14 by the supporter 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 can realize the loading or unloading of the 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 order to secure a liquefied gas storage capacity of 75 K or more, the upper portion 16 is further extended while vertically extending the central portion 18. In this case, the height of the manifold 50 is increased So that the connection end 50a of the manifold 50 can be provided above the upper and lower connectable range 110a of the transfer arm 110. [

Therefore, the present invention has a problem that the connection between the connection end 50a of the manifold 50 and the transfer arm 110 of the outside 100 can not be established. To solve this problem, a step adjustment unit 53 may be provided . The step difference adjusting unit 53 connects the connecting end 50a of the manifold 50 and the transfer arm 110. [

One side of the step difference adjusting unit 53 may be connected to the connecting end 50a of the manifold 50 and the other side may be connected to the transfer arm 110. [ Since the connecting end 50a of the manifold 50 can be positioned relatively higher than the vertically connectable range 110a of the transfer arm 110 as described above, As shown in FIG.

In order to connect the different heights, the step adjustment unit 53 may have a bent or bent shape at least once. For example, the step difference adjusting unit 53 may be S-shaped. Further, the step difference adjusting unit 53 may be detachably provided on 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 when the liquefied gas is transported, the drip tray 51 is provided below the portion where the risk of leakage on the liquefied gas transportation path is high (the connecting end 50a of the manifold 50, etc.) .

The present invention can connect the manifold 50 and the transfer arm 110 to each other by using the step difference adjusting unit 53 and the connecting end 50a of the step difference adjusting unit 53 and the manifold 50 The drip tray 51 can be installed at a position where the risk of leaking of the liquefied gas is high because the connecting point and the point where the level difference adjusting unit 53 and the transfer arm 110 are connected are high. That is, one side and the other side of the level difference adjusting unit 53 can be located above the drip tray 51. [

When the height of the manifold 50 is out of the vertically connectable range 110a of the feed arm 110 while the central portion 18 is extended vertically, the connection between the manifold 50 and the feed arm 110 The step difference adjusting unit 53 is used for realizing it.

This is because the minimum value for the height between the manifold 50 and the drip tray 51 is defined by the classifier or the like (for example, 900 mm). That is, the height between the connecting end 50a of the manifold 50 and the drip tray 51 must be greater than the preset reference value set by the classification. Therefore, the present invention is applicable to the drip tray 51 The connecting end 50a of the manifold 510 located above the reference value of the drip tray 51 is positioned above the vertically connectable range 110a of the transfer arm 110 It is located.

However, the height between the drip tray 51 and the other side of the step adjustment unit 53 (the portion connected to the feed arm 110) may be smaller than the preset reference value. At this time, since the step adjustment unit 53 is detachably provided from the manifold 50, the predetermined reference value can be satisfied when the step adjustment unit 53 is detached.

10 is a front 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, a drip tray 51, and the like. Hereinafter, description will be made mainly on portions that are different in the present embodiment, and portions omitted in the description will be replaced with descriptions in other embodiments.

In this embodiment, the height of the drip tray 51 can be reduced to make the height between the manifold 50 and the drip tray 51 equal to or greater than a preset reference value. That is, the drip tray 51 may be provided so as to be embedded in the upper deck 14.

The height of the drip tray 51 may be reduced so that the height of the manifold 50 can be set at a maximum height at which the feed arm 110 can be connected or at a position below the maximum height. At this time, the drip tray 51 may be placed on the top surface of the topside tank 30 and may be recessed to protrude inward of the topside tank 30. [

Since the cold heat can be transferred to the inside of the topside tank 30 when the liquefied gas leaks into the drip tray 51, the one surface in the direction in which the drip tray 51 is provided in the topside tank 30, And may be made of a strong material (e.g., LT steel). This can be applied when the drip tray 51 is installed directly on the upper deck 14 without any support in another embodiment below.

The height of the manifold 50 is maintained at a predetermined value or more while the height between the drip tray 51 and the manifold 50 is maintained at a predetermined reference value or more by making the drip tray 51 into a recessed shape, So that the height of the connection portion 110 can be made high.

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

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, It can be differentiated.

In this embodiment, the upper deck 14 is inclined so that its height becomes lower toward the both sides from the center of the hull 10, and the inclination of the portion where the connecting end 50a of the manifold 50 is placed above, Lt; RTI ID = 0.0 > in < / RTI >

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 where the inclination is constant up to a certain portion from the center and the second inclined portion 142 is a portion inclined from the first inclined portion 141 to the side side sheathing 13. At this time, the inclination of the second inclined portion 142 may be larger than the inclination of the first inclined portion 141, and the second inclined portion 142 may be connected to the first inclined portion 141 while being bent or bent .

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

The second inclined portion 142 may be partially provided only in a portion where the manifold 50 is disposed along the longitudinal direction of the hull 10. 1, the height of the portion of the side shell 13 connected to the second inclined portion 142 is larger than the height of the second inclined portion 142 in the front or rear direction (the height of the manifold 50) The height at the portion where the second inclined portion 142 is not present) is relatively low.

At this time, the side outside sheathing 13 may have a shape in which the height of the side sheathing 13 is inclined downward from the front or rear of the second inclined portion 142 to the portion connected to the second inclined portion 142. That is, when viewed from the side of the hull 10, the side shell 13 may have a downwardly depressed shape only at a portion where the second inclined portion 142 is provided.

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

This is because the second inclined portion 142 is more inclined than the first inclined portion 141 so that the height of the drip tray 51 located in the second inclined portion 142 is relatively high It is lowered.

Thus, in this embodiment, the height of the manifold 50 can be lowered while securing a liquefied gas storage capacity of 75K or more, and the step-adjustment unit 53 can be omitted, and at the same time, the gap between the manifold 50 and the drip tray 51 The height can be set to a predetermined reference value or more to ensure safety.

The manifold 50 and the transfer arm 110 can be connected to each other with the height between the manifold 50 and the drip tray 51 being equal to or greater than a preset reference value through the structural modification as described above and / 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 which is empty when the manifold 50 is connected to the transfer arm 110 It is common to maintain the state.

However, in order to connect the connection end 50a of the manifold 50 to the transfer arm 110 of the outside 100, fluid is introduced into the rear peak tank 121, Can be increased. In this case, the connection end 50a of the manifold 50 may be positioned above the maximum height at which the transfer arm 110 can be connected.

That is, according to the present invention, as the height between the manifold 50 and the drip tray 51 is increased to a predetermined reference value or more while the central portion 18 is extended, the connecting end 50a of the manifold 50 is moved to the transfer arm 110 The fluid can be introduced into the interior of the rear peak tank 121 for connection between 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 can be lowered to be lower than the maximum height at which the transfer arm 110 can be connected.

Therefore, even if the connecting end 50a of the manifold 50 is provided at a position higher than the transfer arm 110, the present invention can be applied to the manifold 50 by adjusting the draft, 50 can be stably connected to the transfer arm 110.

Of course, it is possible to adjust the draft by filling the rear peak tank 121 with the fluid, and the draft can be controlled by flowing the fluid into the topside tank 30 and the double bottom tank 40. However, The connection end 50a of the manifold 50 can be positioned above the height at which the transfer arm 110 can be connected even if fluid flows into the topside tank 30 and the double bottom tank 40 have. That is, the present invention can realize the connection between 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, a liquefied gas carrier 1 according to a fourth embodiment of the present invention includes a shipfront store 111, a strong deck 122, and a collision-facing bulkhead 113.

The ship line store 111 is provided in the player 11 and serves as a warehouse for storing various goods. Since the ship line store 111 is the first place to be damaged when an impact is applied to the front end of the upper deck 14, a high-risk material or the like may not be disposed inside.

The sunken deck 122 is provided at the stern 12 and equipped with equipment for mooring. The stuck deck 122 is a part exposed to the outside 100 and allows the stern 12 to be moored by a winch or the like placed on the strong deck 122.

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

The collision-compartment partition wall 113 is provided in the lateral direction of the ship 10 below the ship line store 111. The collision-facing partition wall 113 is made of a member thicker and / or higher in strength than the other portion and can be provided to protect the rear components (the liquefied gas tank 20, etc.) from the impact applied to the bow 11 have.

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

According to the provisions of the Rules, the height of the top of the collision wall 113 relative to the collision should be relatively higher than the height of the freeboard deck. 12 (A), when the height of the shiny deck 122 is higher than the lower surface of the ship store 111, the collision-facing bulkhead 113 is installed in the ship store store 111 must also be provided as a collision-facing partition wall 113.

However, when the height of the shiny deck 122 is lower than the lower surface of the ship store 111 as shown in FIG. 12 (B), the ship store 111 is located higher than the height of the freeboard deck, It is not necessary to provide the rear surface as the collision-facing partition wall 113.

In this case, it is sufficient that the collision-facing partition wall 113 is provided from the bottom 15 surface to the bottom surface of the ship-keeping store 111. In other words, in this embodiment, the collision-facing partition wall 113 may be in the form of a plane which is vertically provided from the bottom 15 to the lower surface of the beam store 111.

With this configuration, the present embodiment minimizes the cost of the collision barrier ribs 113, which are thick and made of a material of high strength, so that the total manufacturing cost can be reduced.

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

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

1: Liquefied gas carrier 10: Hull
11: Player 12: Stern
13: side shell 14: upper deck
15: bottom 16: upper
17: Lower part 18:
20: Liquefied gas tank 50: Manifold
100: External 110: Feed arm

Claims (8)

In a liquefied petroleum gas carrier carrying a plurality of liquefied petroleum gas tanks with a width of less than 32.3 m and a liquefied petroleum gas storage capacity of less than 70 K which permits passage of the old Panama Canal,
A lower portion including a bottom of the liquefied petroleum gas tank, an upper portion including an upper deck and an upper end of the liquefied petroleum gas tank, and a middle portion between the lower portion and the upper portion;
The hull is installed on the upper deck and loads or unloads liquefied petroleum gas. The hull extends by extending the central portion up and down to increase the total height of the hull while moving the upper portion upward to secure a liquefied petroleum gas storage capacity of 70K or more A manifold having a connection end located above a vertically connectable height of an 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
And a rear peak tank provided at the stern of the hull,
Wherein the ballast water tank is configured to increase the draft of the hull by flowing fluid into the connecting end of the manifold and the transfer arm,
Wherein the connection end of the manifold is located above a connectable height of the transfer arm even if a fluid flows into the ballast tank,
The rear peak tank is configured such that fluid flows into the ballast tank when the fluid flows into the ballast tank so that the draft of the hull is further raised so that the connection end of the manifold is positioned at a vertically connectable height of the transfer arm Wherein the liquefied petroleum gas carrier is a liquefied petroleum gas carrier. The method according to claim 1,
Wherein the rear peak tank is in a vacant state when the liquefied petroleum gas tank is filled with liquefied petroleum gas. delete delete 3. The method of claim 2,
Wherein the outer shell of the hull is made of a single hull. delete delete delete

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