KR101349870B1 - Anti-sloshing apparatus - Google Patents

Abstract

A sloshing suppression device is disclosed. The sloshing suppressing device according to an embodiment of the present invention includes a plurality of buoyancy blocks and connecting means for interconnecting the plurality of buoyancy blocks, and the sloshing suppression that can float on the surface of the liquid inside the liquid cargo storage tank. An apparatus, comprising: a buoyancy block comprising: a buoyant body having buoyancy force to float on a surface of a liquid; A cover member surrounding the buoyancy body and capable of absorbing liquid, and a cover surrounding the foam member, the cover comprising: a first cover part; And a second cover part having better fluid permeability than the first cover part and disposed on one side of the upper and lower parts of the buoyancy block, wherein the foam member is at least one foam penetrating the foam member from the upper side to the lower side of the buoyancy block. A member through-hole is provided, and the buoyancy body has at least one buoyancy body through-hole penetrating the buoyancy body from the upper side to the lower side of the buoyancy block.

Description

Sloshing Suppression Device {ANTI-SLOSHING APPARATUS}

The present invention relates to a sloshing inhibiting device for suppressing sloshing in a liquid cargo storage tank.

In general, various types of ships are being manufactured to transport liquid cargo by sea. For example, in order to transport liquid cargoes such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), and crude oil, hulls are manufactured according to the characteristics of each cargo. Specific types of liquid cargo storage tanks have been applied to ensure that they are sealed and kept 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 sharply 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 is shown an example in which the buoyancy block including the foam member surrounding the buoyancy body and the cover surrounding the foam member is formed in a cube shape.

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 interconnecting the buoyancy block using the connecting means. At this time, such a connecting means for connecting the buoyancy block is formed of a belt, a plurality of buoyancy blocks can be connected by the belts located at the top and bottom of the buoyancy block is interconnected with the adjacent belt.

In this case, the cover may be made of polyarylate fibers to withstand the cryogenic environment, which is expensive compared to general fibers, and thus, a costly problem arises in manufacturing a sloshing suppressing device.

In addition, when the warm-up operation of the liquid cargo storage tank is a time-consuming problem due to the insulation function of the sloshing suppressor located at the bottom, or when unloading liquid cargo from the liquid cargo storage tank Problems that take a long time to completely escape the liquid cargo remaining inside the containment device can occur.

Patent Document 1: Korean Registered Patent No. 1043622

One embodiment of the present invention is to provide a sloshing suppression apparatus that can reduce the time required for the preparation work for loading and unloading the liquid cargo to the liquid storage tank and increase the efficiency of the operation.

One embodiment of the present invention is to provide a sloshing suppression apparatus that can reduce the manufacturing cost.

According to an aspect of the present invention, there is provided a sloshing suppression device comprising a plurality of buoyancy blocks and connecting means for interconnecting the plurality of buoyancy blocks, and capable of floating on the surface of a liquid inside a liquid cargo storage tank, the buoyancy force The block includes a buoyancy body having buoyancy force to float on the surface of the liquid; A cover member surrounding the buoyancy body and absorbing the liquid and a cover surrounding the foam member, wherein the cover comprises: a first cover part; And a second cover part having better fluid permeability than the first cover part and disposed on one side of the upper and lower parts of the buoyancy block, wherein the foam member penetrates the foam member from an upper side to a lower side of the buoyancy block. And a buoyancy body having at least one buoyant body through-hole penetrating the buoyancy body from an upper side to a lower side of the buoyancy block.

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In this case, the second cover portion may be arranged to form a straight line with at least one of the foam member through hole and the buoyancy body through hole from the upper side to the lower side of the buoyancy block.

At this time, the second cover portion may be located at the center of the buoyancy block.

In addition, a plurality of second cover parts may be formed.

In addition, the second cover part may be an opening.

In addition, the second cover portion may be made of the same material as the first cover portion, the tissue may be formed coarse than the first cover portion.

At this time, the second cover portion may be disposed on the side portion of the buoyancy block.

At this time, the cover may be made of a polyarylate fiber.

On the other hand, the buoyancy block may be made of a hexahedral shape.

On the other hand, the connecting means, the connecting belt is installed on the buoyancy block so as to cross the surface of the buoyancy block and the fastening member for connecting the connection belt of the buoyancy block and the connection belt of the other buoyancy block adjacent to the buoyancy block. It may include.

At this time, the connecting belt may be arranged crosswise on the upper and lower surfaces of the buoyancy block.

At this time, both ends of the connecting belt may be formed with a connecting ring.

At this time, the connecting ring may be located at the corner of the buoyancy block.

In this case, the fastening member may include a pair of fastening members having a curved shape such that both ends of the fastening member can be inserted into the adjacent pair of connecting rings, and the pair of unit fastening members face each opposite end thereof. And may be fastened to each other.

The sloshing suppressing device according to an embodiment of the present invention includes a cover having a good fluid permeability, thereby increasing the efficiency of the preparation work for loading and unloading the liquid cargo into the liquid storage tank.

The sloshing suppression apparatus according to an embodiment of the present invention can reduce the manufacturing cost by including a cover having a rough structure on the side portion of the buoyancy block.

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.
3 is an enlarged view of a portion A in FIG. 2.
4 is a perspective view of a buoyancy unit constituting a sloshing suppression apparatus according to an embodiment of the present invention.
5 is a partially cutaway perspective view of the buoyancy block in the sloshing suppression apparatus according to an embodiment of the present invention.
6 is a detailed perspective view of the foam member and the buoyancy body constituting the buoyancy block in the sloshing suppression apparatus according to an embodiment of the present invention.
7 is a detailed perspective view of a cover constituting the buoyancy block in the sloshing suppression apparatus according to an embodiment of the present invention.
8 is a view showing a state in which the fastening member of the sloshing suppressing device according to an embodiment of the present invention is coupled to the connecting belt.
FIG. 9 is a view illustrating a state in which gas is injected into a liquid cargo storage tank while a sloshing suppressing device according to an embodiment of the present invention is placed on the bottom surface of the liquid cargo storage tank.

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.

The sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for convenience of explanation, and 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.

As shown in FIGS. 1 and 2, a sloshing suppression apparatus 10 according to an embodiment of the present invention is provided with a buoyancy unit 100 arranged in plural on a liquid cargo 2 stored in a liquid cargo storage tank 1. Are arranged to be interconnected in the liquid cargo storage tank 1 in a state arranged side by side in a first direction and in a second direction perpendicular to the first direction, as seen in FIG. 2. The liquid cargo 2 is made to float on the upper surface.

At this time, the sloshing suppressing device 10 is not hit by the sloshing suppressing device 10 such as a plurality of pipes 4 and the like for transporting the liquid, 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 as not to collide with the corner portion of the liquid cargo storage tank 1 or the like.

According to this embodiment of the present invention, sloshing of the liquid cargo 2 is carried out by a plurality of buoyancy units 100 suspended on the liquid cargo 2 stored in the liquid cargo storage tank 1 of the ship. Can be effectively suppressed.

3 is an enlarged view of a portion A in FIG. 2. 4 is a perspective view of the buoyancy unit 100 constituting the sloshing suppression apparatus 10 according to an embodiment of the present invention. 5 is a partial cutaway perspective view of the buoyancy block 110 in the sloshing suppression apparatus 10 according to an embodiment of the present invention. 6 is a detailed perspective view of the buoyancy body 112 and the foam member 114 constituting the buoyancy block 110 in the sloshing suppression apparatus 10 according to an embodiment of the present invention. 7 is a detailed perspective view of the cover 116 constituting the buoyancy block 110 in the sloshing suppression apparatus 10 according to an embodiment of the present invention.

3 to 7, the sloshing suppression apparatus 10 according to an embodiment of the present invention includes a buoyancy unit 100 and a fastening member 130.

At this time, the buoyancy unit 100 is a unit unit constituting the sloshing suppression apparatus 10 according to an embodiment of the present invention, referring to FIGS. 3 and 4, the buoyancy block 110 and the connection belt 120. ).

According to one embodiment of the invention, the buoyancy block 110 is a float having a buoyancy to float on the liquid cargo (2) stored in the liquid cargo storage tank (1), the horizontal, vertical and height is 1.0 ~ 1.5m It may have a cube or a cuboid shape having a length of, but is not limited thereto, and may be variously changed in shape or size according to the shape and size of the inner space of the liquid cargo storage tank 1.

According to an embodiment of the present invention, the buoyancy block 110 may include a buoyancy body 112, a foam member 114 and a cover 116 as shown in FIG.

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.

At this time, the buoyancy body 112 may be a structure formed of a foam foam having a closed cell structure.

In this case, the foam may be made of at least one of expanded polyethylene foam, expanded polypropylene foam, and expanded polyurethane foam.

Here, 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 in which the liquid cargo 2 cannot be penetrated.

As such, the buoyancy body 112 of the foam material having a closed cell structure is such that the foam itself has buoyancy by not introducing liquid into the cell structure even when the buoyancy block 110 is locked in the liquid cargo 2. Can be formed.

In addition, as the buoyancy body 112 is made of a foam material of a closed cell, even if cracks are generated on the surface of the buoyancy body due to thermal load, compression load, or the like, the liquid cargo 2 inside the buoyancy body 112. Since it does not seep, the buoyancy body 112 can maintain the buoyancy stably.

Meanwhile, according to an embodiment of the present invention, the buoyancy body 112 may be any one of a circle, an ellipse, and a polygonal cross section, and may be formed to have a polygonal column shape such as a spherical or square column as a whole.

Meanwhile, according to the exemplary embodiment of the present invention, the buoyancy body through hole 113 may be formed in the buoyancy body 112 in the vertical direction.

In this case, referring to FIG. 6, the buoyant body through hole 113 may be formed in the center of the spherical buoyancy body 112.

The buoyancy body through-hole 113 as described above makes it easy to manufacture the buoyancy body 112 formed of a foam.

In more detail, the buoyancy body 112 made of foam foam in the form of a closed cell is formed by pressing and heating polyethylene particles in the form of a plurality of small grains at a high temperature while being placed in a mold for forming the buoyancy body 112. Can be.

In this case, when the buoyancy body 112 is manufactured by using a mold, the surface is easily formed by a high temperature and high pressure applied to the mold, but in the sphere area, the temperature and pressure are relatively higher than that of the buoyancy body 112. Because of this low, it may be formed into a less dense structure compared to the surface or voids may occur between the polyethylene particles.

At this time, when the buoyancy body through-hole 113 penetrating the buoyancy body 112 is formed, evenly high temperature and high pressure state can be formed even inside the buoyancy body 112, the compact form to the inside of the buoyancy body 112 The buoyancy body 112 can be formed.

At this time, according to an embodiment of the present invention, as shown in Figure 6, the buoyancy body through-hole 113 may be formed in the center of the buoyancy body 112, but is not limited to this, a plurality of The buoyancy body through hole 113 may be formed or may be formed in the periphery of the buoyancy body 112. In addition, the plurality of buoyancy through-holes 113 formed may be arranged side by side or staggered with each other.

At this time, the width and the number of the buoyancy body through-holes 113 formed in the buoyancy body 112 may be variously selected according to the size and shape of the buoyancy body (112).

Meanwhile, according to one embodiment of the present invention, the buoyancy body through-holes 113 formed in the buoyancy body 112 are arranged in the up and down direction, which is the third direction with reference to FIG. 6, inside the buoyancy block 110. It is formed to be.

It is possible to inject hot gas into the liquid cargo storage tank 1 in order to evaporate the liquid cargo 2 inside the liquid cargo storage tank 1 in which the sloshing suppressing device 10 is installed, or When injecting the cooling gas to cool the inside of the storage tank (1), the delivery of the gas can be made faster. A more detailed description thereof will be described later.

However, the direction of the buoyancy body through-hole 113 is not limited to the up and down direction, although not shown in the figure, the buoyancy body through-hole 113 in the first direction and the second direction, which is a horizontal direction based on FIG. Can be formed.

On the other hand, as shown in Figure 5, in the buoyancy block 110 of the sloshing suppression apparatus 10 according to an embodiment of the present invention, the foam member 114 is formed of a cube to the above-described buoyancy body 112 Surround the outer surface of the.

At this time, the foam member 114 may have an open cell structure to more effectively prevent sloshing by the liquid cargo (2).

Here, the open cell structure is a structure in which a hole penetrating the inside and the outside of the foam member 114 is formed on the outer circumferential surface, so that the surface area of the foam member 114 can be maximized, thereby promoting the absorption of the liquid cargo 2. can do.

Thus, 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 floated in a state where a part of the liquid cargo 2 is submerged. The free face of the liquid cargo 2 is covered, so that sloshing by the liquid cargo 2 in the liquid cargo storage tank 1 can be more effectively suppressed.

On the other hand, according to an embodiment of the present invention, the foam member 114 may be made of a polymer material, etc., for example, the absorption of the liquid cargo (2) even at cryogenic temperatures in which the liquid cargo (2), such as LNG, maintains the liquid phase It can be formed of a polymer material comprising any one of the phenolic resin, melamine resin and synthetic resins thereof capable of maintaining elasticity.

Meanwhile, according to one embodiment of the present invention, the foam member through hole 115 may be formed in the foam member 114.

In this case, referring to FIG. 6, the foam member through hole 115 may be formed in a straight line so as to communicate with the buoyancy body through hole 113 formed at the center of the above-described buoyancy body 112.

Accordingly, the delivery of gas through the buoyancy block 110 can be made faster, a detailed description thereof will be described later.

According to one embodiment of the present invention, the foam member through-hole 115 may be formed in the center of the buoyancy block 110, as shown in Figure 6, but is not limited to this, through a plurality of foam members The hole 115 may be formed or may be formed at the periphery of the buoyancy block 110 and not at the center thereof. In addition, the plurality of foam member through holes 115 may be arranged side by side or staggered with each other.

In this case, the width and quantity of the foam member through-hole 115 may be variously selected according to the size and shape of the foam member 114.

On the other hand, according to one embodiment of the present invention, the foam member through-hole 115 formed to penetrate the foam member 114 in the buoyancy block 110, in the vertical direction, which is the third direction with reference to FIG. It is formed to be arranged.

This is to allow a faster delivery of gas through the buoyancy block 110, a detailed description thereof will be described later.

However, the direction of the foam member through-hole 115 is not limited to the up and down direction, and although not shown in the drawings, the foam member through-hole 115 in the first direction and the second direction that is horizontal relative to FIG. Can be formed.

On the other hand, as shown in Figure 5, in the buoyancy block 110 of the sloshing suppression apparatus 10 according to an embodiment of the present invention, the cover 116 surrounds the foam member 114 described above.

The cover 116 may prevent the foam member 114 from breaking, and may also prevent the liquid cargo 2 from being contaminated due to debris of some damaged foam member 114.

At this time, the cover 116 may be made of a material that can have the same durability at room temperature even at cryogenic temperatures, in which case, according to an embodiment of the present invention, the cover 116 is made of polyarylate fibers Can be done.

Meanwhile, according to the exemplary embodiment of the present invention, the cover 116 includes a first cover part 117 and a second cover part 118 having better fluid permeability than the first cover part 117.

Fluid permeability here means the property which the cover 116 permeates a fluid, for example, the liquid cargo 2, and various gas.

At this time, according to an embodiment of the present invention, the first cover portion 117 and the second cover portion 118 may be made of the same material, for example, the aforementioned polyarylate fiber.

That is, the first cover portion 117 is a portion where the tissue of the polyarylate fiber is densely formed, and the second cover portion 118 is a portion where the tissue of the polyarylate fiber is coarser than the first cover portion 117. to be.

In this case, the cover 116 may be formed of the first cover part 117 except for the second cover part 118.

Accordingly, the second cover portion 118 is formed with a coarse texture than the first cover portion 117, the gap between the tissues that can be the penetration space of the fluid can be formed large.

Therefore, the above-described cover 116 according to an embodiment of the present invention has an effect of reducing the material cost than when the entire cover 116 is formed only by the first cover portion 117 where the tissue is densely formed.

Meanwhile, the material of the second cover part 118 is not limited to the above description, and the second cover part 118 may be formed as an opening. However, in this case, only the openings are small enough that the debris of the foam member 114 does not flow out.

In this case, the second cover part 118 may mean a local part in which a plurality of openings are formed, rather than one opening.

According to one embodiment of the present invention, as shown in FIG. 7, the second cover part 118 may be disposed in the center of the upper and lower parts of the buoyancy block 110.

In this case, the second cover part 118 may be located in a space between the pair of unit belts 122 to be described later, in order to avoid interference with the connection belt 120. The unit belt 122 is mentioned later.

6 and 7, through holes 113 and 115 may be formed in the vertical direction in the center of the buoyancy body 112 and the foam member 114 as described above. According to the present invention, the second cover part 118 may be arranged to form a straight line with the buoyancy body through hole 113 and the foam member through hole 115.

At this time, according to an embodiment of the present invention, since the second cover portion 118 may be formed in plural, accordingly it may be formed in the periphery of the buoyancy block 110, not the center, this time is not the center It may be arranged to form a straight line with the plurality of foam member through-holes 115 formed in the peripheral portion.

Meanwhile, according to one embodiment of the present invention, as shown in FIG. 7, the second cover part 118 may be disposed on the side portion of the buoyancy block 110.

At this time, in the buoyancy block 110 of the cube shape, the second cover portion 118 may be located on all four side portions except the upper surface and the lower surface.

This is because, unlike the upper and lower surfaces where the connection belt 120 is fixed and a large load and pressure are applied, the side surface is not subjected to a large load and pressure, so that even if the tissue is formed coarse, durability can be maintained. Because there is.

In addition, since the above-described buoyancy body through hole 113 and the foam member through hole 115 may be formed in the first direction and the second direction based on FIG. 6 instead of the vertical direction, the second cover part ( 118 may communicate with the through holes 113 and 115 formed in the first and second directions to further improve the convection effect of the fluid through the buoyancy block 110.

In addition, by forming the entire side portion of the buoyancy block 110 in the cover 116 as the second cover portion 118, it is possible to maximize the above-described material cost reduction effect.

On the other hand, according to an embodiment of the present invention, a connecting belt 120 is provided on one side of the buoyancy block 110 as a means for connecting the plurality of buoyancy units 100 with each other.

According to one embodiment of the invention, the connection belt 120 may be installed on the surface of the buoyancy block 110 to cross the surface of the buoyancy block 110, as shown in Figures 3 and 4.

More specifically, the connection belt 120 may be installed on the upper and lower surfaces of the buoyancy block 110, respectively, as shown in Figure 4, passing through the center of the upper and lower surfaces of the buoyancy block 110 Can be installed.

Accordingly, the connection belt 120 is installed across the surface of the buoyancy block 110 to maximize the engagement area between the buoyancy block 110 and the connection belt 120, so that the connection belt by the flow of the buoyancy block 110 The load acting on the interface between the 120 and the buoyancy block 110 can be evenly distributed on the surface of the buoyancy block 110, and as a result, the structural stability of the sloshing suppression device 10 can be significantly improved. have.

On the other hand, the connection belt 120 is made of the same material as the cover 116 of the buoyancy block 110, it may be installed on the cover 116 of the buoyancy block 110 by a method such as sewing, in addition to the adhesive It may be installed on the surface of the buoyancy block 110 using the back.

At this time, as shown in Figure 4, the connecting belt 120, a pair of connecting belt 120 may be arranged in a pair so as to cross each other, such a pair of crossed connecting belt 120 is buoyancy It may be installed on the upper and lower surfaces of the block 110, respectively.

As the connection belt 120 is installed in this way, as shown in FIG. 2, the plurality of buoyancy blocks 110 arranged in a lattice structure may be effectively connected in the first direction and the second direction.

In addition, as shown in FIG. 4, the connecting belt 120 may be formed of a pair of unit belts 122, and the unit belts 122 may be disposed to be parallel to each other and spaced apart from each other by a predetermined interval. Can be.

As such, the pair of unit belts 122 are spaced apart from each other, thereby providing a space for easier coupling of the fastening member 130. This will be described in more detail in the description of the fastening member 130.

On the other hand, as shown in Figure 4, both ends of the connecting belt 120, the connecting ring 124 may be formed.

In this case, the connecting ring 124 may be formed by joining a part of the unit belt 122 with another part while the unit belt 122 is curved so that a part of the unit belt 122 faces the other part.

In this case, in one embodiment of the present invention, the unit in which the buoyancy block 110 and the connection belt 120 are coupled may be referred to as a buoyancy unit 100.

The buoyancy unit 100 may be connected to each other by the fastening member 130, according to the sloshing suppression apparatus 10 according to an embodiment of the present invention is buoyancy unit 100 grating by the fastening member 130 It will be understood that it is formed by connecting in form.

8 is a view showing a state in which the fastening members 130 of the sloshing suppression apparatus 10 according to an embodiment of the present invention are coupled to adjacent connection belts 120.

As shown in FIGS. 3 and 8, the fastening member 130 may connect a pair of adjacent connecting rings 124 to each other such that adjacent buoyancy blocks 110 are connected to each other.

Meanwhile, as illustrated 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, as shown in FIG. 8, the fastening member 130 may include 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 addition, the pair of unit fastening members 132 may be disposed so that both ends thereof are opposed to each other by a connecting member 134 such as a bolt.

More specifically, as shown in FIG. 8, the pair of unit fastening members 132 may have a 'U' shape, and both ends of the pair of unit fastening members 132 may be adjacent to each other. 8 may be inserted from top to bottom and bottom to top with reference to FIG. 8.

As shown in FIG. 8, both ends of the pair of unit fastening members 132 respectively inserted into the pair of adjacent coupling rings 124 are spaced apart from each other by the pair of unit belts 122. The pair of unit fastening members 132 may be easily fastened by a connection member 134 such as a nut in such a space.

Meanwhile, according to the exemplary embodiment of the present invention, a cover member (not shown) may be installed on the fastening member 130 so that the fastening member 130 does not come into contact with the liquid cargo storage tank 1.

On the other hand, in one embodiment of the present invention, but a pair of U-shaped unit fastening member 132 as a fastening member 130, the fastening member 130 is not limited to this, for example, ring-shaped in the form of a key ring It is also possible to connect the connection belt 120 using the connection member, or to connect the buoyancy block 110 using a fastening means made of the same material as the connection belt 120.

Meanwhile, in one embodiment of the present invention, although the connecting belt 120 and the fastening member 130 are used as the connecting means for connecting the buoyancy blocks 110 to each other, in order to connect the buoyancy blocks 110 to each other, Velcro tape, It is also possible to use known connection means such as zippers.

The sloshing suppressing device 10 having the above-described structure removes the liquid cargo 2 or the liquid cargo 2 while the sloshing suppressing device 10 is located inside the liquid cargo storage tank 1. It is effective to heat or cool the inside of the liquid cargo storage tank 1 in the preparation step for storing (). Hereinafter, this will be described in detail with different drawings.

9 shows a state in which the sloshing suppressing device according to an embodiment of the present invention injects gas into the liquid cargo storage tank 1 in a state where it is placed on the bottom surface 3 of the liquid cargo storage tank 1. Drawing.

In FIG. 9, the connection belt 120 and the fastening member 130 connecting the buoyancy block 110 of the sloshing suppression apparatus 10 are omitted for simplicity of the drawings.

1 and 9, when the cryogenic liquid cargo 2, for example LNG, is withdrawn from the liquid cargo storage tank 1, the pumping inside the liquid cargo storage tank 1 is used to remove most of the LNG and slightly remaining. LNG will remain on the bottom surface 3 inside the liquid cargo storage tank 1.

At this time, referring to Figure 9, when the sloshing suppression device 10 according to an embodiment of the present invention is installed in the liquid cargo storage tank 1, the sloshing suppression device 10 is a liquid cargo storage tank ( On the bottom surface 3 of 1), the lower portion of the foam member 114 of the sloshing suppression device 10, the liquefied natural gas not yet discharged to the outside of the buoyancy block 110 by gravity It remains in the side region I.

In this manner, the hot gas for evaporating LNG into the liquid cargo storage tank 1 in the state where the sloshing suppressor 10 is placed on the bottom surface 3 of the liquid cargo storage tank 1 is stored in the storage tank 1. ) Is injected from the upper side toward the bottom surface 3 of the liquid cargo storage tank 1 in the downward direction.

The high temperature gas injected in this way promotes the evaporation of LNG which remained at a cryogenic temperature in the storage tank.

At this time, according to one embodiment of the present invention, the hot gas is moved from the upper side to the lower side of the storage tank along the flow of gas in the direction of the arrow shown in FIG. It is introduced into the buoyancy block 110 of the heat passing through the foam member 114 of the buoyancy block 110 to the lower side of the buoyancy block 110.

At this time, the heat of the gas passing through the buoyancy block 110 is transferred to the lower side of the buoyancy block 110 by the conduction of heat by the foam member 114, according to an embodiment of the present invention, the buoyancy body 112 ), The buoyant body through-hole 113, the foam member 114, the foam member through-hole 115, and the cover 116 is formed with a second cover portion 118, the through-holes 113, 115 ) And heat may be transferred from the upper portion of the buoyancy block 110 to the lower portion through convection of the fluid passing through the second cover portion 118.

Accordingly, according to the exemplary embodiment of the present invention, the through-holes 113 and 115 and the second cover part 118 are not penetrated in the buoyancy block 110 in comparison with the case where the buoyancy block 110 is not formed. Since the holes 113 and 115 and the second cover part 118 are formed, heat can be more easily transferred from the upper part of the buoyancy block 110 to the lower part of the buoyancy block 110.

Thus, in order to facilitate the heat transfer in the up and down direction inside the buoyancy block 110, the buoyancy body through-hole 113, the foam member through-hole 115 and the second cover portion 118 is a buoyancy block ( Most preferably, it is arranged in a straight line in the vertical direction of 110).

In this way, the liquid cargo (2) is not only stored in the liquid cargo storage tank (1) but also the liquid cargo (2) is not stored in the liquid cargo storage tank (1). Even when the inside of the liquid cargo storage tank 1 is to be cooled in advance for storage in the storage tank 1, the liquid cargo storage tank 1 provided with the sloshing suppressing device 10 according to an embodiment of the present invention is provided. When the cooling gas is injected from the upper side to the lower side of the liquid cargo storage tank 1, it is possible to transfer the cooling heat more quickly into the liquid cargo storage tank 1.

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
3 Bottom 4 Pipe
10 Sloshing suppression device 100 Buoyancy unit
110 Buoyancy Block 113 Buoyant Through Hole
114 Foam member 115 Through hole
116 Cover 117 First Cover Section
118 2nd cover part 120 Connection belt
122 Unit Belt 124 Link
130 Fastening Member 132 Unit Fastening Member
134 connection member

Claims (17)

A sloshing suppression device comprising a plurality of buoyancy blocks and connecting means for interconnecting said plurality of buoyancy blocks, said sloshing suppressor being able to float on the surface of a liquid inside a liquid cargo storage tank,
The buoyancy block comprises:
A buoyancy body having buoyancy force to float on the surface of the liquid;
A foam member surrounding the buoyant body and capable of absorbing the liquid;
A cover surrounding the foam member,
The cover
A first cover part; And
Fluid permeability is better than the first cover portion, and includes a second cover portion disposed on one side of the upper and lower surfaces of the buoyancy block,
The foam member has at least one foam member through hole penetrating the foam member from the upper side to the lower side of the buoyancy block,
The buoyancy body has at least one buoyancy body through hole penetrating the buoyancy body from the upper side to the lower side of the buoyancy block,
Sloshing suppression device.
delete delete delete The method of claim 1,
The second cover portion,
And a sloshing suppressing device arranged to form a straight line with at least one of the foam member through hole and the buoyancy body through hole from an upper side to a lower side of the buoyancy block.
6. The method of claim 5,
And the second cover portion is located at the center of the buoyancy block.
6. The method of claim 5,
The second cover portion is a sloshing suppression apparatus, characterized in that formed in plurality.
6. The method of claim 5,
And a second cover portion is an opening.
6. The method of claim 5,
The second cover part
Made of the same material as the first cover portion,
Sloshing suppression apparatus, characterized in that the tissue is formed coarse than the first cover portion.
The method of claim 9,
The second cover portion is a sloshing suppression apparatus, characterized in that disposed on the side of the buoyancy block.
The method of claim 10,
And the cover is made of polyarylate fiber.
The method according to any one of claims 1 to 5, wherein
The buoyancy block is a sloshing suppression apparatus, characterized in that consisting of a cube.
The method according to any one of claims 1 to 5, wherein
Wherein the connecting means comprises:
A connecting belt installed on the buoyancy block to cross the surface of the buoyancy block;
And a fastening member connecting the connection belt of the buoyancy block and the connection belt of another buoyancy block adjacent to the buoyancy block.
Sloshing suppression device.
14. The method of claim 13,
And the connecting belt is crosswise arranged on the upper and lower surfaces of the buoyancy block.
The method of claim 14,
Sloshing inhibiting device, characterized in that the connecting ring is formed at both ends of the connecting belt.
16. The method of claim 15,
And said linking ring is located at an edge of said buoyancy block.
17. The method of claim 16,
The fastening member
A pair of fastening members having a curved shape so that both ends are respectively insertable into an adjacent pair of said connecting rings,
The pair of unit fastening members are disposed so that both ends thereof are opposed to each other fastening each other.

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