KR20130012867A - Buoyant unit and anti sloshing apparatus having the same - Google Patents

Abstract

PURPOSE: A buoyancy unit and an anti-sloshing device with the same are provided to effectively prevent the sloshing of liquid cargo and damage to the inner wall of a liquid cargo storage tank in a ship by inserting fastening members for connecting buoyancy units to each other into the grooves of the buoyancy units. CONSTITUTION: A buoyancy unit comprises a buoyancy block(110) and connection belts(120). The connection belts are installed along belt grooves, and have connection rings in both ends. The belt grooves are formed at both sides of the buoyancy block with a cross shape.

Description

BUOYANT UNIT AND ANTI SLOSHING APPARATUS HAVING THE SAME}

The present invention relates to a buoyancy unit for suppressing sloshing in a liquid cargo storage tank and a sloshing inhibiting device comprising the same.

In general, various types of ships are being manufactured to transport liquid cargo by sea. For example, in order to transfer liquid cargoes such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), and crude oil (crude oil), hulls are manufactured according to the characteristics of each cargo. Special types of liquid cargo storage tanks have been applied to keep them sealed and warm.

One of the important loading conditions in the manufacture of such hull and liquid cargo storage tanks is the sloshing problem. Sloshing is a liquid cargo having a free surface because liquid cargo receives continuous kinetic energy due to the movement of the hull. As it refers to the behavior of a fluid that shakes rapidly and causes a strong impact on the inner wall of the liquid cargo storage tank, this sloshing is considered from the beginning of the construction of the hull and the liquid cargo storage tank.

As such, the shape of the hull and the liquid cargo storage tank has been designed to minimize the sloshing caused by the liquid cargo and at the same time to withstand the expected sloshing load. In order to avoid the sloshing load, Shipowners had to accept conditional service conditions with limited cargo load.

Nonetheless, due to the uncertainty of the sloshing load, various problems with the damage of unexpected liquid cargo storage tanks continue to arise.

In order to solve such a sloshing problem, the applicant of the present invention discloses a plurality of buoyancy bodies having buoyancy to be suspended on the surface of a liquid in Korean Registered Patent No. 1043622 (prior document 1), and an open cell to absorb a liquid. It has been proposed a sloshing suppression apparatus having a structure having a structure and a connecting means for connecting the buoyancy body and the adjacent buoyancy body to each other.

At this time, in the sloshing suppressing device disclosed in the prior document 1, an example in which a buoyancy unit including a foam member surrounding a buoyancy body is formed in a cube shape is presented.

By the way, in the sloshing suppression apparatus disclosed in the fifth embodiment of the embodiment of the prior document 1 is shown a structure for connecting the buoyancy unit by using the fastening member and the fastening piece. At this time, since the fastening member and the fastening piece interconnecting the buoyancy units are formed of a rigid material, the sloshing suppression device connecting the buoyancy unit of the cube shape disclosed in the prior document 1 by using the fastening member and the fastening piece is When floating on the surface of LNG in the liquid cargo storage tank, there is a fear that the inside of the liquid cargo storage tank may be damaged by the fastening member and the fastening member while the sloshing suppressor floats and moves inside the liquid cargo.

Prior Art 1: Korean Patent No. 1043622

An embodiment of the present invention is to provide a buoyancy unit that can effectively suppress the sloshing of the liquid cargo stored in the liquid cargo storage tank of the ship, and the sloshing suppression apparatus comprising the same.

One embodiment of the present invention is to provide a buoyancy unit that can effectively suppress the sloshing of the liquid cargo stored in the liquid cargo storage tank without damaging the inner wall of the liquid cargo storage tank of the ship and a sloshing suppression apparatus comprising the same do.

According to one aspect of the present invention, there is provided a buoyancy block having buoyancy to be suspended on a liquid cargo stored in a liquid cargo storage tank, the belt groove is formed across the surface; And a connecting belt installed along the belt groove and having a connecting ring formed at both ends thereof.

In this case, the belt groove may be formed in a direction perpendicular to both opposite sides of the buoyancy block.

In addition, the belt groove may be formed to a constant depth.

In addition, the belt groove may be formed to deepen toward the outside from the center of the surface of the buoyancy block.

In addition, the belt grooves are formed in a pair and may cross each other perpendicularly.

In addition, the belt grooves are respectively formed on the upper and lower surfaces of the buoyancy block facing each other, and may be arranged side by side.

On the other hand, the connection belt may be formed of a pair of unit belts arranged side by side and spaced apart from each other.

On the other hand, the buoyancy block, buoyancy body having a buoyancy to be suspended on the liquid cargo; A foam member having an open cell structure to absorb the liquid and surrounding the buoyancy body; And a cover surrounding the foam member.

In this case, the buoyancy body may be a structure containing a gas, or made of a foam material of a closed cell (CLOSED CELL) structure.

In addition, the buoyancy block may be a cube shape.

According to another aspect of the invention, the above-described buoyancy unit is disposed on a plurality of the liquid cargo to cover the surface of the liquid cargo stored in the liquid cargo storage tank; And a fastening member for connecting the adjacent connecting rings to each other such that the adjacent buoyancy units are connected to each other.

In this case, the fastening member includes a pair of unit fastening members having a curved shape so that both ends are respectively inserted into the adjacent connecting ring, and the pair of unit fastening members are disposed so that their respective ends face each other. Can be fastened.

In addition, the buoyancy unit may be arranged in a grid structure.

According to one embodiment of the present invention, by the sloshing suppression device including a plurality of buoyancy units that can be connected to each other in a simple and stable connection structure, the sloshing of the liquid cargo stored in the liquid cargo storage tank of the ship, etc. effectively You can.

According to one embodiment of the present invention, by inserting a fastening member for connecting a plurality of buoyancy units to each other in a groove formed in the buoyancy unit, preventing damage to the inner wall of the liquid cargo storage tank of the vessel by the fastening member protruding outwardly It is possible to effectively suppress the sloshing of the liquid cargo.

1 is a cross-sectional view illustrating a sloshing suppression device according to an embodiment of the present invention installed in a liquid cargo storage tank.
FIG. 2 is a plan view showing a state where a sloshing suppression device according to an embodiment of the present invention is installed in a liquid cargo storage tank. FIG.
FIG. 3 is an enlarged view of part III in FIG. 2.
4 is a perspective view showing a buoyancy unit of the sloshing suppression apparatus according to an embodiment of the present invention.
5 is a perspective view showing a case in which the shape of the belt groove is changed in the buoyancy unit of the sloshing suppressing apparatus according to an embodiment of the present invention.
6 is a partial sectional view taken along the line VI-VI 'in FIG. 4.
7 is a cutaway view showing the inside of the buoyancy block of the sloshing suppression apparatus according to an embodiment of the present invention.
8 is a plan view showing a fastening member of the sloshing suppression apparatus according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Sizes and thicknesses of the components shown in the drawings are arbitrarily shown for convenience of description, and thus, the present invention is not necessarily limited to those shown in the drawings.

1 is a cross-sectional view showing a state in which a sloshing suppression apparatus 10 according to an embodiment of the present invention is installed in a liquid cargo storage tank 1. 2 is a plan view showing a state in which the sloshing suppression apparatus 10 according to an embodiment of the present invention is installed in the liquid cargo storage tank 1. FIG. 3 is an enlarged view of part III in FIG. 2.

1 to 3, a sloshing suppression apparatus 10 according to an embodiment of the present invention is suspended on a liquid cargo 2 stored in a liquid cargo storage tank 1 so as to float the liquid cargo 2. The sloshing can be effectively suppressed.

In this case, the liquid cargo storage tank 1 in which the sloshing suppressing device 10 may be installed may be an LNG storage tank, and the liquid cargo 2 may be LNG. However, the liquid cargo storage tank 1 in which the sloshing suppressing device 10 according to the present invention can be installed is not limited thereto.

The sloshing suppression apparatus 10 according to an embodiment of the present invention includes a buoyancy unit 100 disposed on the liquid cargo 2 in a plurality so as to cover the surface of the liquid cargo 2, and an adjacent buoyancy unit ( And a fastening member 130 connecting the 100 to each other.

As such, the plurality of buoyancy units 100 are connected to each other by the fastening member 130, so that the sloshing suppression device 10 floating on the surface of the liquid cargo 2 may be implemented.

At this time, in the sloshing suppression apparatus 10 according to an embodiment of the present invention, the buoyancy unit 100 may be arranged in a lattice structure.

As such, the plurality of buoyancy units 100 suspended on the liquid cargo 2 are connected to each other in a lattice structure so as to cover the surface of the liquid cargo 2 as wide as possible, so that the ship may pitch and roll during operation. ), Sloshing by the liquid cargo 2 in the liquid cargo storage tank 1 can be effectively suppressed when moving in various directions, such as yaw.

At this time, the sloshing suppressing device 10 is a sloshing suppressing device (eg, a plurality of pipes 4 for conveying a liquid cargo 2, for example LNG, which can be stored in the liquid cargo storage tank 1). The buoyancy unit 100 may not be installed in some areas so that 10) does not collide or does not collide with the corner portion of the liquid cargo storage tank 1.

Hereinafter, with reference to FIGS. 4-7, the specific structure of the buoyancy unit 100 which comprises the sloshing suppression apparatus 10 is demonstrated in detail.

4 is a perspective view showing the buoyancy unit 100 of the sloshing suppression apparatus 10 according to an embodiment of the present invention. 5 is a perspective view showing a case in which the shape of the belt groove is changed in the unit 100 of the sloshing suppression apparatus 10 according to an embodiment of the present invention. 6 is a partial sectional view taken along the line VI-VI 'in FIG. 4. 7 is a cutaway view showing the inside of the buoyancy block 110 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

Meanwhile, the belt groove 115 in FIGS. 4 to 7 is exaggerated for convenience of explanation and understanding.

4 to 7, the buoyancy unit 100 according to an embodiment of the present invention may include a buoyancy block 110 and a connection belt 120.

The buoyancy block 110 is a component having buoyancy to float on the liquid cargo 2 stored in the liquid cargo storage tank 1.

At this time, the buoyancy block 110 may have a cube or cuboid shape having a length of 1.0 to 1.5m in the horizontal, vertical and height, but is not limited thereto, and the shape and size of the internal space of the liquid cargo storage tank 1 Depending on the shape or size can be changed in various ways.

According to one embodiment of the invention, the buoyancy block 110 is formed with a belt groove 115 across the surface, which is a configuration for installing the connecting belt 120 to be described later.

On the other hand, with respect to the belt groove 115 will be described in detail with the configuration of the connection belt 120 at the portion to present the connection belt 120.

On the other hand, the buoyancy block 110 of the buoyancy unit 100 according to an embodiment of the present invention may be made of a buoyancy body 112, the foam member 114 and the cover 116.

The buoyancy body 112 is a component having buoyancy so that the buoyancy unit 100 according to an embodiment of the present invention is suspended on the liquid cargo 2.

In this case, the buoyancy body 112 may have a spherical shape as shown in FIG. 6, but is not limited thereto and may be formed of an ellipsoid or various other structures.

In addition, the buoyancy body 112 may be made of a material having a strength that does not change the shape by the buoyancy.

According to one embodiment of the present invention, the buoyancy body 112 may be made of aluminum or aluminum alloy so that the liquid cargo 2 is LNG so as to sufficiently perform its role even at cryogenic temperatures.

On the other hand, the buoyant body 112 may be a structure including a gas.

At this time, the buoyant body 112 may have a hollow structure having a hermetic space so that a gas, which is not converted into a liquid phase even at a very low temperature, can be filled therein when the liquid material 2 is LNG.

In addition, the buoyancy body 112 may have a buoyancy due to such structural characteristics, but may also have a buoyancy due to the characteristics of the material, as another embodiment of the present invention the buoyancy body 112 is a closed cell ( CLOSED CELL) can be made of foam material.

In this case, the closed cell structure is a structure in which a hole through which the fluid can pass through the inside and the outside of the foam material structure is not formed, and means a structure formed so that the liquid cargo 2 cannot penetrate.

As the buoyancy body 112 is made of the foam material of the closed cell in this way, even if cracks are generated on the surface of the buoyancy body 112 by thermal load, compression load, or the like, the liquid cargo 2 into the buoyancy body 2. This doesn't soak Therefore, the buoyancy body 112 can maintain the buoyancy stably.

For example, the buoyancy body may be formed of a polymer material including any one of phenol resins, melamine resins, and synthetic resins thereof such that liquid cargoes such as LNG maintain elasticity even at cryogenic temperatures in which liquid phases are maintained.

Hereinafter, the foam member 114 surrounding the buoyancy body 112 will be described in detail.

According to one embodiment of the present invention, the foam member 114 is a configuration surrounding the outer surface of the above-described buoyancy body 112, and determines the shape of the buoyancy unit 100.

Accordingly, the overall shape of the foam member 114 may be formed of a cube or a cube, but is not limited thereto, such as the shape of the buoyancy block 110 described above, and may vary according to the characteristics of the internal space of the liquid cargo storage tank 1. Can be changed.

On the other hand, the foam member 114 may have an open cell (OPEN CELL) structure.

At this time, the open cell structure is a structure in which a hole passing through the inside and the outside of the foam member 114 is formed, and means a structure in which the liquid cargo 2 can be passed.

Accordingly, the surface area of the foam member 114 can be maximized, so that the absorption of the liquid cargo 2 can be promoted.

As such, the foam member 114 is formed in an open cell structure so that the liquid cargo 2 penetrates into the foam member 114, so that the buoyancy block 110 is at least partially locked to the surface of the liquid cargo 2. It floats and covers the free surface of the liquid cargo 2.

Accordingly, the buoyancy block 110 presses the free surface of the liquid cargo 2 at a predetermined weight, so that sloshing by the liquid cargo 2 in the liquid cargo storage tank 1 can be more effectively suppressed.

On the other hand, the foam member 114 of the buoyancy unit 100 according to an embodiment of the present invention, it is possible to absorb the liquid cargo (2) even at cryogenic temperatures, such as when the liquid cargo (2) is LNG can maintain elasticity It may be made of a polymeric material and the like.

In this case, the foam member 114 may be formed of a polymer material including any one of a phenol resin, a melamine resin, and a synthetic resin thereof.

Cover 116 is a configuration for wrapping the foam member 114 described above, as can be seen in Figures 5 to 6.

The cover 116 of the buoyancy unit 100 according to an embodiment of the present invention, to prevent the foam member 114 is broken, the liquid cargo (2) is contaminated due to the debris of some damaged foam member 114 It can also be prevented.

At this time, the cover 116 may be made of a material that can have the same durability as at room temperature even at cryogenic temperature, such as when the liquid cargo 2 is LNG.

In this case, the cover 116 may be made of polyacrylate (polyacrilate) fibers and the like.

Hereinafter, a detailed configuration of the connection belt 120 installed along the belt groove 115 formed in the buoyancy block 110 will be described with reference to the drawings.

According to one embodiment of the invention, the connection belt 120 is a configuration for assisting the fastening member 130 for connecting the buoyancy unit 100 to each other.

4 to 7, the connecting belt 120 is inserted into and installed in the belt groove 115 along the belt groove 115 formed across the surface of the buoyancy block 110.

Therefore, the configuration of the belt groove 115 into which the connecting belt 120 is inserted will be described first, and then the configuration of the connecting belt 120 will be described.

Meanwhile, as mentioned above, the size and depth of the belt groove 115 in FIGS. 4 to 7 are exaggerated for convenience of explanation and understanding, but according to an embodiment of the present invention, The size, depth, etc. will be included within the scope of the present invention as long as the connection belt 120 is inserted into the belt groove 115 and does not protrude outward.

According to an embodiment of the present invention, the belt groove 115 may be formed in a direction perpendicular to opposite sides of the buoyancy block 110, that is, in a direction perpendicular to the edge of the surface of the buoyancy block 110.

In this case, since the belt grooves 115 are formed to cross each other perpendicularly in a pair, they may be formed in a cross shape while passing through the center of the surface of the buoyancy block 110.

At this time, the belt groove 115 is formed on the upper and lower surfaces of the buoyancy block 110, respectively, may be arranged side by side.

Here, the upper and lower surfaces are based on a state in which the buoyancy unit 100 according to an embodiment of the present invention is suspended on the liquid cargo 2 of the liquid cargo storage tank 1 as shown in FIG. 1. Meaning an upper surface and a lower surface, the same also in the following description.

On the other hand, according to an embodiment of the present invention, the belt groove 115 may be formed to a constant depth.

In this case, the connection belt 120 inserted into the belt groove 115 can be straightened straight and can be efficiently and stably arranged.

However, the present invention is not limited thereto, and referring to FIG. 5, the belt groove 115 may be formed to have a deeper depth from the center of the surface of the buoyancy block 110 toward the outside.

Accordingly, it is possible to reduce the loss of the volume of the foam member 114 due to the formation of the belt groove 115, while exhibiting the effect of preventing the projection to the outer portion of the fastening member 130 to be described later, the liquid cargo storage tank (1) ), The belt groove 115 can absorb a larger amount of the liquid cargo 2 than the embodiment formed to a predetermined depth, thereby improving the anti-sloshing effect.

On the other hand, since the connecting belt 120 in the viewing force unit 100 according to an embodiment of the present invention is inserted and installed along the belt groove 115, the arrangement configuration of the connecting belt 120 is described in detail above the belt groove 115 Is the same as the arrangement of

That is, as shown in FIGS. 4 to 7, the connection belt 120 may be installed along the belt groove 115 formed in a cross shape parallel to the upper and lower surfaces of the buoyancy block 110.

As the connection belt 120 is vertically installed in this way, as shown in FIG. 3, the plurality of buoyancy units 100 arranged in a lattice structure may be effectively connected in the longitudinal direction and the transverse direction.

In addition, since the belt groove 115 is formed in a direction and a shape parallel to the upper and lower surfaces of the buoyancy block 110, the connection belt 115 inserted into the belt groove 115 is also the upper portion of the buoyancy block 110. It is installed side by side on the bottom and bottom surfaces.

As such, the connecting belt 120 is not simply installed at the end of the buoyancy block 11 or at the local area of the buoyancy block 110, but is installed across the surface of the buoyancy block 110 to provide a buoyancy block 110. By maximizing the contact area between the connection belt 120 and. The load acting on the interface between the connecting belt 120 and the buoyancy block 110 by the flow of the buoyancy block 110 may be evenly distributed on the surface of the buoyancy block 110.

As a result, the structural stability of the sloshing suppression apparatus 10 can be significantly improved.

On the other hand, according to an embodiment of the present invention, the connecting belt 120 may be made of the same material as the cover 116.

Accordingly, the liquid cargo 2 may be made of polyacrylate fiber, which is a material capable of having the same durability as at room temperature even at cryogenic temperatures, such as LNG.

On the other hand, according to an embodiment of the present invention, the connection belt 120 may be installed on the cover 116 of the buoyancy block 110 by a method such as sewing, but is not limited thereto and by various methods such as using an adhesive. It may be installed on the surface of the buoyancy block 110.

Meanwhile, according to an embodiment of the present invention, as shown in FIG. 4, the connecting belt 120 may be formed of a pair of unit belts 122.

In this case, the unit belts 122 are arranged in parallel with each other, and are installed to be spaced apart from each other by a predetermined interval.

As the pair of unit belt 122 is spaced apart from each other, it is possible to provide a space for easier coupling of the fastening member 130 to be described later. This will be described in detail in the presenting the fastening member 130.

On the other hand, in the buoyancy unit 100 according to an embodiment of the present invention, the connecting ring 124 is formed at both ends of the connection belt 120, it is possible to facilitate the coupling between the buoyancy unit 100.

At this time, as shown in FIGS. 4 to 6, the connecting ring 124 of the connecting belt 120 is connected in a state in which the connecting belt 120 is curved so that a part of the connecting belt 120 faces another part. A portion of the belt 120 may be formed by joining with another portion.

That is, by connecting the part and the other part with each other by sewing or the like in a state in which the part of the connection belt 120 is overlapped so as to face the other part, the connection is performed without using an additional member. Link ring 124 may be formed at the end of the belt (120).

However, the present invention is not limited thereto, and the connecting ring 124 may be formed in various ways, or additional members may be combined to play the same role.

Hereinafter, a fastening member 130 for connecting the buoyancy units 100 to each other will be described in detail with reference to the drawings.

8 is a plan view showing a fastening member 130 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

3 and 8, the fastening member 130 of the sloshing suppression apparatus 10 according to an embodiment of the present invention has an adjacent pair of connecting rings 124 such that adjacent buoyancy units 100 are connected to each other. Are connected to each other.

In this case, as shown in FIG. 8, the fastening member 130 may include a pair of unit fastening members 132 disposed to be symmetrical to each other.

That is, the fastening member 130 may be formed of a pair of unit fastening members 132 having a curved shape so that both ends thereof can be inserted into the adjacent pair of connecting rings 124, respectively.

In this case, the pair of unit fastening members 132 may be disposed so that the opposite ends thereof may be fastened to each other by a connecting member 134 such as a nut.

More specifically, referring to FIG. 8, the pair of fastening members 132 have a 'U' shape, and both ends of the pair of unit fastening members 132 are connected to an adjacent pair of connecting rings 124. Based on FIG. 8, they may be inserted from top to bottom or from bottom to top, respectively.

As described above, both ends of the pair of unit fastening members 132 respectively inserted into the pair of adjacent coupling rings 124 may be positioned on spaced spaces between the pair of unit belts 122.

Accordingly, the pair of unit fastening members 132 may be easily fastened by the connection member 134 without interference with the connection belt 120 in the spaced space.

Meanwhile, in one embodiment of the present invention, a pair of 'U'-shaped unit fastening members 132 is illustrated as the fastening member 130, but the fastening member 130 is not limited thereto, for example, in the form of a key ring. The ring-shaped fastening means or the overall rectangular fastening means may be used, or fastening means made of the same material as the connecting belt 120 may be used.

On the other hand, the fastening member 130 may be made of aluminum, SUS or other composite materials to be used at cryogenic temperatures, such as when the liquid cargo 2 is LNG.

According to the exemplary embodiment of the present invention, since the connecting belt 120 to which the fastening member 130 is coupled is inserted through the inside of the buoyancy block 110 to be inserted and installed, the fastening member 130 is external to the buoyancy unit 100. It may not protrude to the side.

Accordingly, in the sloshing suppression apparatus 10 according to an embodiment of the present invention, it is possible to prevent a risk due to a collision between the fastening member 130, which is a rigid material, and the inner wall of the liquid cargo storage tank 1.

As described above, the sloshing suppression apparatus 10 according to the embodiment of the present invention includes a buoyancy block 110 having buoyancy so as to float on the liquid cargo 2 of the liquid cargo storage tank 1; The plurality of buoyancy units 100 including the connection belt 120 installed through the buoyancy block 110 may be implemented by connecting adjacent connection belts 120 to each other through the fastening member 130.

Accordingly, the plurality of buoyancy units 100 can be efficiently arranged in a simple and stable connection structure, so that sloshing of the liquid cargo 2 in the liquid cargo storage tank 1 can be effectively suppressed.

In addition, the fastening member 130 is formed of a rigid material because the fastening member 130 does not protrude outward due to the configuration of the connection belt 120 installed along the belt groove 115 formed across the surface of the buoyancy block 110. An effect that can prevent the risk due to a collision between the 130 and the inner wall of the liquid cargo storage tank 1 can be exerted.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, 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 Liquid Cargo Storage Tanks 2 Liquid Cargo
4 piping 10 sloshing suppressor
100 Buoyancy Units 110 Buoyancy Blocks
112 Buoyant body 114 Foam member
115 belt groove 116 cover
120 connecting belt 122 unit belt
124 Hook 130 Fastener
132 unit fastening member 134 connecting member

Claims (13)

A buoyancy block having buoyancy to float on the liquid cargo stored in the liquid cargo storage tank, wherein a belt groove is formed across the surface; And
A buoyancy unit installed along the belt groove, including a connecting belt formed with a connecting ring at both ends.
The method of claim 1,
And the belt groove is formed in a direction perpendicular to opposite sides of the buoyancy block.
The method of claim 1,
And the belt groove is formed to a constant depth.
The method of claim 1,
And the belt groove is formed to be deeper toward the outside from the center of the surface of the buoyancy block.
The method of claim 1,
And the belt grooves are formed in pairs and intersect perpendicularly to each other.
The method of claim 1,
The belt grooves are respectively formed on the upper and lower surfaces of the buoyancy block facing each other, arranged side by side with each other, buoyancy unit.
The method of claim 1,
The connecting belt is a buoyancy unit consisting of a pair of unit belt disposed side by side and spaced apart from each other.
The method of claim 1,
The buoyancy block,
A buoyancy body having buoyancy to float on the liquid cargo;
A foam member having an open cell structure to absorb the liquid and surrounding the buoyancy body; And
A buoyancy unit comprising a cover surrounding the foam member.
The method of claim 8,
The buoyancy body is a structure containing a gas, or made of a foam material of a closed cell (CLOSED CELL) structure, buoyancy unit.
The method of claim 8,
The buoyancy block is a hexahedral shape, buoyancy unit.
The buoyancy unit of any one of claims 1 to 10 disposed on the liquid cargo so as to cover the surface of the liquid cargo stored in the liquid cargo storage tank; And
And a fastening member connecting the adjacent connecting rings to each other such that the adjacent buoyancy units are connected to each other.
12. The method of claim 11,
The fastening member includes a pair of unit fastening members each having a curved shape such that both ends thereof can be inserted into the adjacent connecting ring,
The pair of unit fastening members are disposed so that each end thereof is opposed to each other, the sloshing suppression device.
12. The method of claim 11,
And the buoyancy unit is arranged in a lattice structure.

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