阅读说明：本技术 船舶 (Ship with a detachable cover ) 是由 上田雄一郎 田中麻衣子 吉田巧 江口雄三 于 2019-03-04 设计创作，主要内容包括：船舶具有：船体；罐,其搭载于船体并贮存液化气,该罐包含沿水平方向延伸的圆筒状的罐主体和从罐主体向上突出的圆顶；罐罩,其覆盖罐主体,并且具有供圆顶贯穿插入的开口；环状的加强部件,其在开口的周围对罐罩进行支承；以及定盘,其设置在加强部件与罐主体的顶部之间,限制罐的摇摆。(A ship is provided with: a hull; a tank mounted on a hull and storing liquefied gas, the tank including a cylindrical tank body extending in a horizontal direction and a dome protruding upward from the tank body; a can cover covering the can body and having an opening through which the dome is inserted; an annular reinforcing member that supports the tank cover around the opening; and a fixed plate which is arranged between the reinforcing component and the top of the tank main body and limits the swing of the tank.)

1. A marine vessel, having:

a hull;

a tank mounted on the hull and storing liquefied gas, the tank including a cylindrical tank body extending in a horizontal direction and a dome protruding upward from the tank body;

a can cover covering the can body and having an opening through which the dome is inserted;

an annular reinforcing member that supports the tank cover around the opening; and

a fixed plate disposed between the reinforcing member and the top of the tank main body, and restricting the swing of the tank.

2. The vessel according to claim 1, wherein,

the axial direction of the tank main body is parallel to the ship length direction,

the center of the dome is located further to the stern side than the axial center of the tank main body,

the fixed plate is disposed on the stern side of the dome.

3. The vessel according to claim 2, wherein,

the fixed plate is a 1 st fixed plate,

the ship further has:

a plurality of frame members arranged in the axial direction of the tank main body and supporting the tank cover;

a pair of saddles that support the tank main body at positions spaced apart from each other in an axial direction of the tank main body; and

a 2 nd fixed plate disposed between one of the plurality of skeleton members and a top of the tank main body on a bow side of the dome,

the 1 st fixed plate and the 2 nd fixed plate are disposed at positions overlapping the pair of saddles in the vertical direction.

4. The vessel according to claim 1 or 2,

the fixed plate comprises:

a block fixed to the tank main body; and

a pair of stoppers located on both sides of the block in the width direction of the can body,

the pair of stoppers are fixed to the reinforcing member.

5. The vessel according to claim 3, wherein,

the 1 st fixed plate and the 2 nd fixed plate respectively comprise:

a block fixed to the tank main body; and

a pair of stoppers located on both sides of the block in the width direction of the can body,

the pair of stoppers of the 1 st fixed plate is fixed to the reinforcing member, and the pair of stoppers of the 2 nd fixed plate is fixed to the frame member.

Technical Field

The present invention relates to a ship having a tank for storing liquefied gas.

Background

In a ship such as a liquefied gas carrier, a tank for storing liquefied gas is mounted on a ship body. As the shape of the tank, there are various shapes, and for example, patent document 1 discloses a structure in the vicinity of a tank 120 in a ship 100 shown in fig. 6.

In the ship 100, the tank 120 mounted on the hull 110 is covered with the tank cover 130. The can 120 includes a cylindrical can body 121 extending in a horizontal direction and a dome 122 protruding upward from the can body 121. The can 130 has an opening 131 through which the dome 122 is inserted, and the opening 131 is covered by a dome 140.

Disclosure of Invention

Problems to be solved by the invention

In the ship 100 including the tank 120 including the cylindrical tank body 121 shown in fig. 6, a surface plate (chock) for restricting the oscillation of the tank 120 due to the oscillation of the hull 110 is preferably provided. For example, since the tank cover 130 is supported by a plurality of frame members arranged in the axial direction of the tank main body 121, it is conceivable to provide a surface plate between one of the frame members and the top of the tank main body 121 (a portion straight in the axial direction of the tank main body 121).

However, in this case, since it is necessary to determine the position of the surface plate first from the position of the skeleton member and then determine the position of the dome, the position of the dome is limited.

Accordingly, an object of the present invention is to provide a ship capable of reducing restrictions on the dome position.

Means for solving the problems

In order to solve the above problem, the inventors of the present invention have paid attention to a case where an annular reinforcing member for supporting a tank cover is provided around an opening for a normal dome, and have conceived to provide a surface plate on the reinforcing member. The present invention has been completed based on such a point.

That is, the ship of the present invention includes: a hull; a tank mounted on the hull and storing liquefied gas, the tank including a cylindrical tank body extending in a horizontal direction and a dome protruding upward from the tank body; a can cover covering the can body and having an opening through which the dome is inserted; an annular reinforcing member that supports the tank cover around the opening; and a fixed plate disposed between the reinforcing member and the top of the tank main body, and restricting the swing of the tank.

According to the above configuration, since the surface plate is provided between the annular reinforcing member supporting the can cover around the opening and the top of the can body, the restriction on the position of the dome can be reduced. Further, since the surface plate is arranged in the vicinity of the dome, the distance between the dome and the surface plate can be reduced as compared with a case where the surface plate is provided between one of the frame members and the top portion of the tank main body. This makes it possible to cope with an increase in the size of the dome, which alleviates the limitation on the number or size of the pipes penetrating the dome.

The tank body may have an axial direction parallel to a ship length direction, the dome may have a center located at a stern side of the axial center of the tank body, and the surface plate may be disposed at a stern side of the dome. According to this configuration, even when the surface plate is disposed on the stern side of the dome, the dome can be positioned closest to the stern.

The fixed deck may be a 1 st fixed deck, and the ship may further include: a plurality of frame members arranged in the axial direction of the tank main body and supporting the tank cover; a pair of saddles that support the tank main body at positions spaced apart from each other in an axial direction of the tank main body; and a 2 nd fixed plate provided between one of the plurality of frame members and the top of the tank main body on the bow side of the dome, the 1 st fixed plate and the 2 nd fixed plate being disposed at positions overlapping the pair of saddles in the vertical direction. With this configuration, the tank body can be prevented from being distorted when the hull swings.

For example, the surface plate may include: a block fixed to the tank main body; and a pair of stoppers located on both sides of the block in the width direction of the tank main body, the pair of stoppers being fixed to the reinforcing member.

Alternatively, the 1 st and 2 nd fixed disks may include: a block fixed to the tank main body; and a pair of stoppers located on both sides of the block in the width direction of the tank main body, wherein the pair of stoppers of the 1 st fixed plate is fixed to the reinforcing member, and the pair of stoppers of the 2 nd fixed plate is fixed to the frame member.

Effects of the invention

According to the present invention, restriction on the position of the dome can be reduced.

Drawings

Fig. 1 is a side view of a ship according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line II-II of fig. 1.

Fig. 3 is a longitudinal section of a part of the vessel of fig. 1.

Fig. 4 is a top view along line IV-IV of fig. 3.

Fig. 5 is a front view of the surface plate.

Fig. 6 is a sectional view of a part of a conventional ship.

Detailed Description

Fig. 1 and 2 show a vessel 1 according to an embodiment of the invention. The ship 1 is, for example, a liquefied gas carrier ship for transporting liquefied gas.

In the present embodiment, the ship 1 includes a hull 2 and two tanks 3 mounted on the hull 2. The tanks 3 are arranged in the length direction of the ship. However, the number of tanks 3 mounted on the hull 2 may be one, or may be three or more.

Each tank 3 stores liquefied gas. The liquefied gas is, for example, liquefied petroleum gas (LPG, about-45 deg.C), liquefied ethylene gas (LEG, about-100 deg.C), liquefied natural gas (LNG, about-160 deg.C), Liquefied Hydrogen (LH)₂About-250 deg.C), liquidHelium (LHe, about-270 ℃ C.).

In the present embodiment, as shown in fig. 2, each tank 3 is a double-shell tank and includes an inner tank and an outer tank. For example, a vacuum insulation layer is arranged between the inner tank and the outer tank. However, the tank 3 may be a single-shell tank covered with an insulating material. For example, the insulating material may be composed of a plurality of vacuum insulation panels, or may be composed of a plurality of foam boards.

Each of the tanks 3 includes a cylindrical tank main body 31 extending in the horizontal direction and a dome 32 projecting upward from the tank main body 31. The axial direction of the tank main body 31 does not need to be completely parallel to the horizontal direction, and may be substantially parallel to the horizontal direction (for example, an angle of 10 degrees or less with respect to the horizontal direction). In the present embodiment, the axial direction of the tank main body 31 is parallel to the ship length direction.

More specifically, the tank body 31 includes a body portion extending in the ship length direction with a constant cross-sectional shape, and a hemispherical closing portion closing openings on both sides of the body portion. However, the closing portion may be a plane perpendicular to the main body portion or may be a disk-like shape.

The dome 32 is a member for collecting pipes penetrating the tank 3. The projecting direction of the dome 32 is parallel to the vertical direction in the present embodiment, but may be slightly inclined with respect to the vertical direction. In the present embodiment, the center of the dome 32 is located further to the stern side than the axial center of the tank main body 31.

A recess 21 into which the two tanks 3 are inserted is formed in the hull 2, and the recess 21 is divided into two chambers 23 between the tanks 3 by a partition wall 22. In each chamber 23, a pair of saddles 25 supporting the tank body 31 are disposed at positions separated from each other in the axial direction of the tank body 31. For example, the saddles 25 are disposed near both ends of the bottom portion of the tank main body 31 (straight portion in the axial direction of the tank main body 31).

The tank body 31 of each tank 3 is covered with a tank cover 4. Each tank cover 4 forms a chamber for accommodating the tank main body 31 together with the chamber 23.

As shown in fig. 3 and 4, each can lid 4 has an opening 41 through which the dome 32 of the can 3 is inserted. The opening 41 is covered by the dome 5. In the present embodiment, the dome 5 is low in height, and the dome 32 penetrates the dome 5. However, the dome 5 may be higher than the top of the dome 32, as in the conventional ship 100 shown in fig. 6.

The can lid 4 is supported by a plurality of frame members 6 arranged in the axial direction of the can body 31. Each of the frame members 6 extends in a direction perpendicular to the axial direction of the tank main body 31. The tank cover 4 is supported by the annular reinforcing member 7 around the opening 41. The reinforcing member 7 is engaged with the skeleton member 6 at the corresponding position.

In the present embodiment, two stators 8 for restricting the oscillation of the tank 3 are disposed on the bow side and the stern side of the dome 32. For example, the surface plates 8 are disposed near both ends of the top portion (straight portion in the axial direction of the tank body 31) of the tank body 31. In the present embodiment, each surface plate 8 is disposed at a position overlapping the saddle 25 in the vertical direction.

The bow-side surface plate 8 is disposed between the frame member 6 and the top of the tank main body 31. On the other hand, the stern-side surface plate 8 is provided between the reinforcing member 7 and the top of the tank main body 31.

As shown in fig. 5, each of the surface plates 8 includes a block 81 fixed to the tank main body 31 and a pair of stoppers 82 positioned on both sides of the block 81 in the width direction (ship width direction) of the tank main body 31. For example, the lower portion of the block 81 is inserted into a frame 83 provided on the top of the tank main body 31. In the bow-side surface plate 8, a pair of stoppers 82 are fixed to the frame member 6, and in the stern-side surface plate 8, a pair of stoppers 82 are fixed to the reinforcing member 7.

For example, the frame member 6 and the reinforcing member 7 each have an inverted T-shaped cross section, and include a vertical plate (a flat surface in the frame member 6 and a cylindrical shape in the reinforcing member 7) having an upper end joined to the tank cover 4 and a horizontal flange joined to a lower end of the vertical plate. A pair of stoppers 82 is fixed to the lower surface of the horizontal flange.

As described above, in the ship 1 of the present embodiment, since the surface plate 8 is provided between the annular reinforcing member 7 that supports the tank cover 4 around the opening 41 and the top of the tank main body 31, the restriction on the position of the dome 32 can be reduced. Further, since the surface plate 8 is disposed in the vicinity of the dome 32, the distance between the dome 32 and the surface plate 8 can be made smaller than in the case where the surface plate 8 is provided between the frame member 6 and the top of the tank main body 31. This also makes it possible to cope with an increase in the size of the dome 32, which alleviates the limitation on the number or size of the pipes penetrating the dome 32.

Even when the surface plate is disposed on the stern side of the dome 32, the dome 32 can be positioned closest to the stern.

In the present embodiment, since each of the surface plates 8 is disposed at a position overlapping the saddle 25 in the vertical direction, the distortion of the tank main body 31 can be suppressed when the hull 2 side swings.

(modification example)

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, the number of the surface plate 8 may be one. In this case, the surface plate 8 may be disposed on the bow side of the dome 32.

Description of the reference symbols

1: a vessel; 2: a hull; 25: a saddle; 3: a tank; 31: a canister body; 32: a dome; 4: a tank cover; 41: an opening; 6: a skeleton member; 7: a reinforcing member; 8: and (5) fixing the disc.