KR101375252B1 - Anti sloshing apparatus for onshore liquid cargo storage tank - Google Patents

Abstract

A sloshing inhibiting device for a land liquid cargo storage tank is disclosed. An embodiment of the present invention is a sloshing suppression apparatus for a land liquid cargo storage tank, comprising buoyancy units suspended on liquid cargo stored in the land liquid cargo storage tank, and a fastening member connecting the buoyancy units, The buoyancy units have at least two volumes.

Description

Sloshing suppression device for onshore liquid cargo storage tank {ANTI SLOSHING APPARATUS FOR ONSHORE LIQUID CARGO STORAGE TANK}

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

In general, various types of liquid cargo storage tanks are installed on the land to store liquid cargo. For example, in order to store liquid cargoes such as liquefied natural gas (LNG), liquefied petroleum gas (LPG) and crude oil, to seal and insulate the cargo at low or high pressure according to the characteristics of each cargo. Special types of storage tanks are being manufactured.

One of the major loading conditions in the manufacture of liquid cargo storage tanks is the sloshing problem, which is a liquid cargo having a free surface due to the shaking of the storage tank due to external factors such as earthquakes. This sloshing refers to the behavior of a fluid that causes a strong impact on the inner wall of the storage space (ie liquid cargo storage tank), such sloshing is considered from the beginning of the construction of the liquid cargo storage tank.

Liquid cargo storage tanks have been designed to withstand the sloshing loads expected while minimizing sloshing by liquid cargo. Nevertheless, the uncertainty of the sloshing load is causing unexpected damage to the liquid cargo storage tank.

In order to solve the sloshing problem, the applicant of the present invention is a sloshing suppressing device for controlling the flow of a liquid cargo, such as a liquid fuel, in Korean Patent No. 1043622 (prior document 1), which floats on the surface of a liquid. Proposed a sloshing suppression apparatus having a plurality of buoyancy body having a buoyancy as possible, an open cell structure to absorb liquid, and including a foam member surrounding the buoyancy body and connecting means for connecting adjacent buoyancy bodies to each other have.

The sloshing suppressing device disclosed in the prior document 1 has a problem of requiring a large number of fastening members by connecting the connecting belts of neighboring buoyancy units with fastening members using buoyancy units having a unit structure.

Prior Art 1: Korean Patent No. 1043622

One embodiment of the present invention is to provide a sloshing suppression device for a land liquid cargo storage tank that reduces the number of fastening members connecting the buoyancy unit.

An embodiment of the present invention is a sloshing suppression apparatus for a land liquid cargo storage tank, comprising buoyancy units suspended on liquid cargo stored in the land liquid cargo storage tank, and a fastening member connecting the buoyancy units. The buoyancy units have at least two volumes.

The cross section of the land liquid cargo storage tank is formed in a circular shape, and the buoyancy units may be formed in a circular or donut shape as a whole to cover the surface of the liquid cargo stored inside the land liquid cargo storage tank.

The buoyancy units include a first unit buoyancy unit having a first volume and a second unit buoyancy unit having a second volume that is greater than a first volume of the first unit buoyancy unit, wherein the first unit buoyancy unit includes: The second unit buoyancy unit may be disposed at an outer portion in the land liquid cargo storage tank, and the second unit buoyancy unit may be disposed inside the first unit buoyancy units at a central portion in the land liquid cargo storage tank.

The buoyancy units further comprise third unit buoyancy units having a third volume between the first volume and the second volume, wherein the third unit buoyancy units decrease in volume as they go from the center to the outer portion. May be arranged in order.

The buoyancy units may be arranged in the order of the first unit buoyancy unit, the third unit buoyancy unit and the second unit buoyancy unit along the radial direction in the land liquid cargo storage tank, from the outer portion to the central portion. have.

The first volume of the first unit buoyancy unit may form a unit volume, and the second volume of the second unit buoyancy unit may be a multiple of the first volume.

The first volume of the first unit buoyancy unit forms a unit volume, the second volume of the second unit buoyancy unit is a multiple of the first volume, and the third volume of the third unit buoyancy units is the first volume. It may be a multiple of the first volume between the volume and the second volume.

The first unit buoyancy unit is disposed at an outer portion in the land liquid cargo storage tank, and the second unit buoyancy unit is disposed at a center portion in the land liquid cargo storage tank, and the third unit buoyancy units are the The volume may be arranged in descending order from the center to the outer portion.

The buoyancy unit includes a connection belt installed on the buoyancy block to form a connecting ring at both ends, wherein the buoyancy block includes a buoyancy body having buoyancy, a foam member surrounding the buoyancy body, and a cover covering the foam member. The buoyancy body of the second unit buoyancy unit and the buoyancy body of the third unit buoyancy unit may be formed longer than the buoyancy body of the first unit buoyancy unit.

The first unit buoyancy unit may form a buoyancy body into a sphere or a rectangular parallelepiped, and the second unit buoyancy unit and the third unit buoyancy unit may form a buoyancy body into a cylinder or a square cylinder.

As such, according to one embodiment of the present invention, since the volume of the buoyancy unit is formed in various ways, the number of fastening members connecting the buoyancy unit can be reduced.

1 is a schematic block diagram of a terrestrial liquid cargo storage tank.
2 is a cross-sectional view showing a sloshing suppression apparatus installed in a land liquid cargo storage tank according to an embodiment of the present invention.
FIG. 3 is a plan view showing a state where a sloshing suppression device according to an embodiment of the present invention is installed in a land liquid storage tank.
FIG. 4 is an enlarged view of a portion A in FIG. 3, and is a plan view showing a part of a sloshing suppression apparatus according to an embodiment of the present invention.
5 is a perspective view of a first unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention.
6 is a partial cross-sectional perspective view of FIG. 5.
7 is a perspective view of a state in which the fastening member is disassembled in a neighboring buoyancy unit.
8 is a plan view of a neighboring buoyancy unit coupled to the fastening member.
9 is a plan view of a state in which a cover member is attached to a fastening member of the buoyancy unit.
10 is a perspective view of a third (double multiple) unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention.
FIG. 11 is a partial cross-sectional perspective view of FIG. 10.
12 is a perspective view of a third (multiple multiple) unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention.
13 is a partial cross-sectional perspective view of FIG. 11.
14 is a perspective view of a second (quad multiple) unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention.
15 is a partial cross-sectional perspective view of FIG. 14.
16 is an operational state diagram 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, which will be readily apparent to those skilled in the art to which the present invention pertains. 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.

1 is a schematic block diagram of a terrestrial liquid cargo storage tank. 2 is a cross-sectional view showing a sloshing suppression apparatus installed in a land liquid cargo storage tank according to an embodiment of the present invention. FIG. 3 is a plan view showing a state where a sloshing suppression device according to an embodiment of the present invention is installed in a land liquid storage tank. FIG. 4 is an enlarged view of a portion A in FIG. 3 and is a plan view showing a part of a sloshing suppressing apparatus according to an embodiment of the present invention.

The sloshing suppression apparatus according to an embodiment of the present invention may be installed in a land liquid cargo storage tank 100 installed on the land as shown in FIG. 1. For example, the liquid cargo may comprise liquefied natural gas (LNG), liquefied petroleum gas (LPG) or crude oil.

Referring to FIG. 1, the land liquid cargo storage tank 100 is installed on the foundation 200 constructed on the ground, the storage tank body 110 installed on the foundation 200, and the body 110. It may include a domed roof 120 installed on.

The storage tank body 110 is a bottom surface 101 installed on the foundation 200, an inner shell 102 installed on the bottom surface 101 to form an inner wall of the tank, and an outer side of the inner shell 102. An outer shell 103 to form an outer wall of the tank, and a suspended ceiling 104 to form a ceiling inside the tank below the domed roof 120.

In the cross section of the land liquid cargo storage tank 100, the inner shell 102 and the outer shell 103 may be circular (see FIG. 3). A pump (not shown) and a pipeline 130 for transporting the liquid cargo 3 into the interior liquid cargo storage tank 100 are installed adjacent to the inner shell 102 and at the center of the suspension ceiling 104. Spray nozzle lines (not shown) may be installed.

The land liquid cargo storage tank 100 is formed to be kept warm and pressurized during storage of the liquid cargo 3 according to the characteristics of the liquid stored therein. For convenience, in one embodiment, the land liquid cargo storage tank 100 stores liquefied natural gas therein.

Accordingly, the sloshing suppressing device 4 for the land liquid cargo storage tank according to an embodiment may be installed inside the land liquid cargo storage tank 100 to suppress the sloshing of the liquefied natural gas.

The internal structure of the land liquid cargo storage tank 100 and the liquid cargo 3 stored therein are not limited thereto. The sloshing suppressing device 4 according to one embodiment can be used to suppress the sloshing of the land liquid cargo storage tank 100 of various structures installed on land and the liquid cargo 3 stored therein.

With reference to FIGS. 2 to 4, the sloshing suppression apparatus 4 of one embodiment includes buoyancy units 10, and buoyancy units suspended on liquid cargo 3 stored in a land liquid cargo storage tank 100. And a fastening member 30 (see 31, 32, FIGS. 7 and 8) connecting the 10.

The buoyancy units 10 are arranged in a lattice structure to cover the surface of the liquid cargo 3 stored in the circular land liquid cargo storage tank 100, and are connected to each other by the fastening member 30, whereby the liquid cargo 3 Implements a sloshing inhibiting device suspended on the surface of

At this time, the sloshing suppression device 4 by the buoyancy units 10 is disposed on the surface of the liquid cargo 3 of the land liquid cargo storage tank 100, as can be seen in FIG. ) May be arranged in the form of an empty donut.

The buoyancy units 10 of the sloshing suppressor 4 are in the form of donuts, and spray nozzles are installed in the center of the suspended ceiling 104 which is disposed inside the circular land liquid cargo storage tank 100. If so, interference between the spray nozzle and the upper sloshing suppressor 4 can be prevented. Therefore, when the spray nozzle is not installed in the center of the suspended ceiling 104, the upper portion of the sloshing suppression device may be formed in a circular shape without the center empty.

3 and 4, the buoyancy units 10 are arranged in a line adjacent to each other in the first direction (x-axis direction), and the rows of the buoyancy units 10 arranged in this line are arranged in the first direction. They are arranged side by side in a second direction (y-axis direction) perpendicular to the (x-axis direction). In total, the buoyancy units 10 of the sloshing suppressing device 4 may form a circular periphery which is a cross-sectional shape of the outer wall of the storage tank 100.

Referring again to FIGS. 2 and 3, the sloshing inhibiting device 4 does not collide with a plurality of pipelines 130 for transporting liquid, for example LNG, stored in the land liquid cargo storage tank 100. Or may not have a buoyancy unit in some of the areas 42 so as not to hit the inner shell 102 of the onshore liquid cargo storage tank 100.

The sloshing suppressing device 4 according to the embodiment of the present invention floats the buoyancy unit 10 on the surface of the liquid cargo 3 stored in the onshore liquid cargo storage tank 100, thereby providing the liquid cargo 3. The sloshing suppression effect of can be effectively implemented.

On the other hand, the sloshing suppression apparatus 4 of one embodiment forms the buoyancy units 10 in two or more types in order to reduce the number of fastening members 30 connecting the buoyancy units 10.

For example, the buoyancy units 10 may be formed of two units each having a different volume. That is, the buoyancy units 10 may be formed of a first unit buoyancy unit 11 having a first volume and a second unit buoyancy unit 24 having a second volume larger than the first volume.

Therefore, since the second unit buoyancy unit 24 of the second volume has a volume corresponding to the plurality of first unit buoyancy units 11 of the first volume, corresponding to the corresponding number of the first unit buoyancy units 11, In the sloshing suppressing device 4, the number of fastening members 30 can be reduced.

In addition, the buoyancy units 10 may be formed in three or more volumes by further including a third unit buoyancy unit 22 having a third volume between the first volume and the second volume. That is, since the buoyancy units 10 may be formed in incrementally increasing or decreasing volumes, the number of fastening members 30 in the sloshing suppressing device 4 may be reduced step by step.

By the second and third unit buoyancy units 24 and 22, the number of fastening members 30 in the sloshing suppressing device 4 decreases, resulting in the manufacture and installation of the sloshing suppressing device 4. The cost can be reduced and the strength of the sloshing suppressing device 4 can be increased.

A configuration for effectively suppressing sloshing in the onshore liquid cargo storage tank 100 is illustrated.

For example, in the case where the buoyancy units 10 are formed in two volumes, the first unit buoyancy unit 11 of the first volume is disposed in the outer portion of the land liquid cargo storage tank 100 to be largely formed. The sloshing is suppressed, and the second unit buoyancy unit 24 of the second volume is disposed inside the first unit buoyancy unit 11 which is the center in the onshore liquid cargo storage tank 100 to suppress sloshing that occurs small. can do.

In addition, when the buoyancy units 10 are formed in three or more volumes, the first unit buoyancy unit 11 of the first volume is disposed in the outer portion of the onshore liquid cargo storage tank 100 so that sloshing occurs largely. And the second unit buoyancy unit 24 of the second volume can be disposed in the center portion in the land liquid cargo storage tank 100 to suppress sloshing occurring small.

And the third unit buoyancy units 22 (221, 222) of the third volume are disposed between the first unit buoyancy unit 11 of the first volume and the second unit buoyancy unit 24 of the second volume, and The volume of the liquid cargo storage tank 100 may be arranged in an order of gradual decrease while going from the center to the outer portion.

At this time, the buoyancy units 10 are the first unit buoyancy unit 11, the third unit buoyancy unit 22; 221, 222, the second unit buoyancy unit along the radial direction in the land liquid cargo storage tank 100 24, the third unit buoyancy units 22 and 221 and 222 may be arranged in the order of the first unit buoyancy units 11. That is, the buoyancy units 10 go from the outer portion of the land liquid cargo storage tank 100 to the center portion, the first unit buoyancy unit 11, the third unit buoyancy unit 22; 221, 222 and the second unit buoyancy. May be arranged in the order of the units 24.

In the present embodiment, the third unit buoyancy units 22; 222 and 221 illustrate two types but may be formed in two or more types. In this case, the second unit buoyancy unit 24 may be formed in a volume of the maximum drainage of the first unit buoyancy unit 11 and disposed at the center portion in the land liquid cargo storage tank 100. The third unit buoyancy units 22; 222, 221 are formed in a volume larger than that of the first unit buoyancy unit 11 while being smaller than the volume of the second unit buoyancy unit 24, so that drainage is reduced from the central portion to the outer portion. May be arranged in order.

In the present embodiment, the second unit buoyancy unit 24 is formed of four times the volume of the first unit buoyancy unit 11, and the third unit buoyancy units 222, 221 are formed of the first unit buoyancy unit ( 11) Three volumes and two times the volume are formed respectively.

The quadruple volume second unit buoyancy unit 24 covers the liquid cargo 3 with the volume connecting the four first unit buoyancy units 11 and thus uses four first unit buoyancy units 11. In comparison with the case, three fastening members 30 can be reduced in the y-axis direction.

Since the triple unit volume second unit buoyancy unit 222 covers the liquid cargo 3 with the volume connecting the three first unit buoyancy units 11, it uses three first unit buoyancy units 11. In comparison with the case, two fastening members 30 can be reduced in the y-axis direction.

Since the double unit volume second unit buoyancy unit 221 covers the liquid cargo 3 with the volume connecting the two first unit buoyancy units 11, it uses two first unit buoyancy units 11. In comparison with the case, one fastening member 30 can be reduced in the y-axis direction.

First, the first unit buoyancy unit 11 will be described, and for convenience, the first unit buoyancy with respect to the fastening member 30 connecting the buoyancy unit 10, that is, the unit fastening member 31 and the connecting member 32, will be described. The unit 11 will be described as an example.

5 is a perspective view of a first unit buoyancy unit forming a sloshing suppression apparatus according to an embodiment of the present invention, Figure 6 is a partial cross-sectional perspective view of FIG.

5 and 6, the first unit buoyancy unit 11 has a buoyancy block 12 having buoyancy to float on the liquid cargo 3 stored in the onshore liquid cargo storage tank 100, and the buoyant buoyancy adjacent thereto. A connecting belt 13 connecting the blocks 12.

The buoyancy block 12 has a cube or cuboid shape having a length of 1.0-1.5 m in width, length, and height, and may have various sizes and various shapes according to the size of the space inside the land liquid cargo storage tank 100. .

The buoyancy block 12 includes a buoyancy body 121 having buoyancy, a foam member 122 surrounding the buoyancy body 121, and a cover 123 covering the foam member 122. In the first unit buoyancy unit 11, the buoyancy body 121 is formed as a sphere as shown, it may be made of an ellipsoid, a rectangular parallelepiped or other various structures (not shown).

The buoyancy body 121 has a buoyancy force to be suspended in the liquid cargo (3), when the liquid cargo (3) is LNG in a hollow structure of the airtight space to fill the gas inside the liquid phase conversion is not made even at cryogenic temperatures Can be done. The buoyancy body 121 may provide buoyancy with structural characteristics as described above, and may also provide buoyancy with characteristics of materials.

The buoyancy body 121 is made of a material having a strength that the shape does not change due to buoyancy, aluminum or aluminum alloy so that the strength is sufficiently maintained without being deformed even in the cryogenic state by the liquid cargo (3), such as LNG Can be made.

In addition, the buoyancy body may be made of a foam material having a closed cell structure (not shown). That is, the buoyancy body does not have a hollow structure but the buoyancy body itself may be made of a foam material having a closed cell structure. Here, the closed cell structure is a structure that may have buoyancy because it does not absorb liquid into the buoyancy body.

As the buoyancy body is made of the foam material of the closed cell as described above, even if cracks are generated on the surface of the buoyancy body due to thermal load or compression load, liquid cargo does not penetrate into the buoyancy body. Therefore, the buoyant body can stably maintain buoyancy.

For example, a buoyant body can maintain elasticity at cryogenic temperatures such as a polymer material including any one of phenolic resin, melamine resin and synthetic resin so that liquid cargo such as LNG can maintain elasticity even at cryogenic temperatures. It may be formed of a material.

On the other hand, when the liquid cargo 3 is filled in the inside of the land liquid cargo storage tank 100 (see FIG. 16), the buoyancy units 10 are caused by the flow of the liquid cargo 3 due to an earthquake or the like. The compressive load F1 can be received from the liquid cargo 3.

The compressive load F1 may act as a concentrated load on the foam member 122 and the buoyancy body 121 of the buoyancy block 12. Such concentrated load may damage the foam member 122 or the buoyancy body 121 forming the buoyancy block 12.

The foam member 122 surrounds the outer surface of the buoyancy body 121 to form the overall shape of the buoyancy block 12 as a cube or a cuboid. The foam member 122 may have an open cell structure to absorb the liquid cargo 3 to more effectively suppress sloshing.

Here, the open cell structure is a structure for forming a hole penetrating the inside and the outside of the foam member 122 on the outer peripheral surface of the foam member 122, maximizing the surface area of the foam member 122. Thus, the open cell structure can promote the absorption of the liquid cargo 3 by the foam member 122.

In this way, the foam member 122 is formed in an open cell structure to absorb the liquid cargo 3 so that the buoyancy block 12 floats in a partially submerged state on the surface of the liquid cargo 3 to free the liquid surface 3 of the liquid cargo 3. To cover. As a result, the sloshing of the liquid cargo 3 in the onshore liquid cargo storage tank 100 can be more effectively suppressed.

The foam member 122 may be made of a polymer material, and the like, for example, a phenolic resin capable of absorbing the liquid cargo 3 even at cryogenic temperatures in which the liquid cargo 3 such as LNG maintains a liquid state and maintaining elasticity. It may be formed of a polymer material containing any one of, melamine resin and synthetic resins thereof.

The cover 123 surrounds the outer surface of the foam member 122 to prevent the foam member 122 from breaking and prevents contamination of the liquid cargo 3 due to the debris of some damaged foam member 122. Cover 123 may be made of a material that can have the same durability at room temperature even at cryogenic temperatures.

The connecting belt 13 is installed in the buoyancy block 12 and has a connecting ring 135 formed at both ends to insert a pair of unit fastening members 31. For example, the connecting belt 13 is installed across the center of the buoyancy block 12 on one side and the other side (top and bottom surfaces of FIG. 5) of the buoyancy block 12, respectively.

The connecting belt 13 is not simply installed at the end of the buoyancy block 12 or at the local area of the buoyancy block 12, but as described above is installed across the surface of the buoyancy block 12 to provide a buoyancy block 12. Maximize the adhesion area with). Therefore, the load acting on the interface between the connecting belt 13 and the buoyancy block 12 by the flow of the buoyancy block 12 can be evenly distributed on the surface of the buoyancy block 12, thus, sloshing suppression device (4) is structurally stable.

The connection belt 13 may be made of the same material as the cover 123 of the buoyancy block 12 and may be installed on the cover 123 by sewing, and may be installed on the surface of the buoyancy block 12 with an adhesive (not shown). have.

The connecting belt 13 is provided with a pair of unit belts 131 and 132 and another pair of unit belts 131 and 132 intersecting with each other, and are installed to intersect one surface and the other surface of the buoyancy block 12, respectively. .

By intersecting the connecting belt 13, the first unit buoyancy units 11 arranged in a lattice structure may be connected in the x-axis direction and the y-axis direction. The connecting belt 13, that is, the unit belts 131 and 132, forms a connecting ring 135 at both ends thereof.

7 is a perspective view of a state in which a fastening member is disassembled in a neighboring buoyancy unit, and FIG. 8 is a plan view of a state in which a neighboring buoyancy unit is coupled to a fastening member. 7 to 8, neighboring first unit buoyancy units 11 and 11 are formed at both sides of the unit belts 131 and 132 and the coupling rings 135 and 135 of the unit belts 131 and 132. The unit fastening member 31 of a U "shape is fastened, and the connection member 32 is fastened to the screw part of both unit fastening members 31, and is connected mutually.

Both ends of the pair of unit fastening members 31 inserted into the adjacent pair of coupling rings 135 and 135, respectively, as shown in FIG. 8, the pair of unit belts 131 and 132 and the other pair Located in the spaced apart space between the unit belts (131, 132), a pair of unit fastening member 31 can be fastened to the connecting member 32 in this space.

The fastening member is not limited thereto, and it may be possible to interconnect the buoyancy blocks using, for example, a ring-shaped connecting member in the form of a key ring or a fastening member in a generally square shape, or using a connecting member made of the same material as the belt.

9 is a plan view of a state in which a cover member is attached to a fastening member of the buoyancy unit. With reference to FIG. 9, the cover member 139 covers the fastening member 30 to prevent contact between the fastening member 30 and the suspended ceiling 104 of the land liquid cargo storage tank 100, and in this contact. To prevent damage to the onshore liquid cargo storage tank 100 and the suspension ceiling (104). The fastening member 30 may be made of aluminum or stainless steel, or other composite materials to be used at cryogenic temperatures.

10 to 15, the buoyancy units 10, that is, the second (fourfold) and third (3, double) unit buoyancy units 24 and 22 (222 and 221) will be described. do.

FIG. 10 is a perspective view of a third (double multiple) unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention, and FIG. 11 is a partial cross-sectional perspective view of FIG. 10.

Referring to FIGS. 10 and 11, the third unit buoyancy unit 221 having a double volume may use the buoyancy block 212 as twice the volume, that is, the same cross-sectional area, of the buoyancy block 12 of the first unit buoyancy unit 11. It is formed twice the length of. That is, the buoyancy body 411 is formed longer than the spherical buoyancy body 121 of the first unit buoyancy unit 11. That is, in the buoyancy block 212, the buoyancy body 411 is formed of a cylinder or a square column (not shown). For convenience, the buoyancy body 411 is illustrated as a cylinder in the third unit buoyancy unit 221 of double volume.

As the buoyancy body 411 is formed in a cylinder, the foam member 412 surrounding the buoyancy body 411 is formed into a rectangular parallelepiped. That is, the foam member 412 of the third unit buoyancy unit 221 having a double volume is longer than the cube member 122 of the cube or cuboid shape of the first unit buoyancy unit 11. The cover 413 covers the cuboid foam member 412.

The connecting belt 23 is a width of the foam member 412 so as to intersect with the pair of first unit belts 231, 231 sewn on the cover 413 in the longitudinal direction (y-axis direction) of the foam member 412. And a pair of second unit belts 232 and 232 sewn to the cover 413 in the direction (x-axis direction). The second unit belts 232 and 232 may be disposed at two positions corresponding to the foam member 122 of the first unit buoyancy unit 11 in the longitudinal direction of the foam member 412, and may be disposed (not shown) at one position. have.

The third unit buoyancy unit 221 of the double volume has the buoyancy block 212 and the first unit belt 231 twice the buoyancy block 12 and the connecting belt 13 of the first unit buoyancy unit 11. Since it is formed in length, compared with the case of using the 1st unit buoyancy unit 11, the number of fastening members 30 in the sloshing suppression apparatus 4 can be reduced by one.

12 is a perspective view of a third (three-fold) unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention, Figure 13 is a partial cross-sectional perspective view of FIG.

12 and 13, the third unit buoyancy unit 222 of three times the volume of the buoyancy block 312 of the first unit buoyancy unit 11 of the buoyancy block 12 of three times the volume of the same cross-sectional area It is formed three times in length. That is, the buoyancy body 421 is formed longer than the spherical buoyancy body 121 of the first unit buoyancy unit 11. That is, in the buoyancy block 312, the buoyancy body 421 is formed of a cylinder or a square column (not shown). For convenience, the buoyancy body 421 is illustrated as a cylinder in the third unit buoyancy unit 222 of triple volume.

As the buoyancy body 421 is formed into a cylinder, the foam member 422 surrounding the buoyancy body 421 is formed into a rectangular parallelepiped. That is, the foam member 422 of the third unit buoyancy unit 222 having a triple multiple volume is formed longer than the cube member or cuboid-shaped foam member 122 of the first unit buoyancy unit 11. The cover 423 covers the foam member 422 of the rectangular parallelepiped.

The connecting belt 33 is a width of the foam member 422 to cross the pair of first unit belts 331 and 331 sewn to the cover 423 in the longitudinal direction (y-axis direction) of the foam member 422. And a pair of second unit belts 332 and 332 sewn to the cover 423 in the direction (x-axis direction). The second unit belts 332 and 332 are disposed at three locations corresponding to the foam member 122 of the first unit buoyancy unit 11 in the longitudinal direction of the foam member 422, and are disposed at one or two locations (not shown). May be applied.

The third unit buoyancy unit 222 having a triple volume triples the buoyancy block 312 and the first unit belt 331 to three times the buoyancy block 12 and the connecting belt 13 of the first unit buoyancy unit 11. As a result, compared to the case of using the first unit buoyancy unit 11, the number of fastening members 30 in the sloshing suppressing device 4 can be reduced by one or two.

FIG. 14 is a perspective view of a second (four-fold) unit buoyancy unit forming a sloshing suppressing device according to an embodiment of the present invention, and FIG. 15 is a partial cross-sectional perspective view of FIG. 14.

Referring to FIGS. 14 and 15, the second unit buoyancy unit 24 of the quadruple volume replaces the buoyancy block 52 of four times the volume of the first unit buoyancy unit 11 buoyancy block 12, ie, of the same cross-sectional area. It is formed four times in length. That is, the buoyancy body 431 is formed longer than the spherical buoyancy body 121 of the first unit buoyancy unit 11. That is, in the buoyancy block 52, the buoyancy body 431 is formed of a cylinder or a square column (not shown). For convenience, the buoyancy body 431 is illustrated as a cylinder in the second unit buoyancy unit 24 having a multiple volume.

As the buoyancy body 431 is formed in a cylinder, the foam member 432 surrounding the buoyancy body 431 is formed into a rectangular parallelepiped. That is, the foam member 432 of the second unit buoyancy unit 24 having a quadruple volume is formed longer than the cube member or the cuboid-shaped foam member 122 of the first unit buoyancy unit 11. The cover 433 covers the foam member 432 of the rectangular parallelepiped.

The connecting belt 53 is a width of the foam member 432 so as to intersect with the pair of first unit belts 531, 531 sewn on the cover 433 in the longitudinal direction (y-axis direction) of the foam member 432. And a pair of second unit belts 532 and 532 sewn to the cover 433 in the direction (x-axis direction). The second unit belts 532 and 532 are disposed at four locations corresponding to the foam member 122 of the first unit buoyancy unit 11 in the longitudinal direction of the foam member 432, and are disposed at one, two or three locations. (Not shown).

The second unit buoyancy unit 24 of quadruple volume replaces the buoyancy block 52 and the first unit belt 531 with four times the buoyancy block 12 and the connecting belt 13 of the first unit buoyancy unit 11. As a result, compared to the case of using the first unit buoyancy unit 11, the number of fastening members 30 in the sloshing suppressing device 4 can be reduced by one, two or three.

On the other hand, in the above description, the first unit buoyancy unit 11 having the unit volume, the third unit buoyancy units 22: 221 and 222 having the double or triple volume, and the second unit buoyancy unit 24 having the quadruple volume are described above. ) Has been described that the number of fastening members 30 is reduced in the arrangement connected in the y-axis direction.

In addition, the third unit buoyancy unit 221 of the double displacement volume is installed in one of two places and the second unit buoyancy unit 221 is not installed in one place, and the third unit buoyancy unit 221 of the triple displacement volume is made of The second unit belt 332 is installed in one or two of three places and is not installed in the rest, and the second unit buoyancy unit 24 of the quadruple volume has the second unit belt 532 in one, two or four places. If it installs in three places and does not install in the rest, in the sloshing suppression apparatus 4, the number of the fastening members 30 can be reduced by the number which is not installed.

16 is an operational state diagram of the sloshing suppression apparatus according to an embodiment of the present invention. Referring to FIG. 16, buoyant units 10 of the sloshing suppressing device 4, when the liquid cargo 3 flows, with the liquid cargo 3 loaded inside the land liquid cargo storage tank 100. The sloshing by the liquid cargo 3 can be suppressed while flowing through the fastening member 30 while floating in the state locked to the free surface of the liquid cargo 3.

At this time, the first unit buoyancy units 11 located in the outer portion of the land liquid cargo storage tank 100 is large flow by the large sloshing of the liquid cargo 3 while suppressing the sloshing, the position while going to the center The third and second unit buoyancy units 22 (221, 222, 24) can suppress sloshing with small flow by the gradually smaller sloshing of the liquid cargo 3.

That is, as compared with the second unit buoyancy unit 24 in the center portion, the third unit buoyancy unit 22 flows larger on the liquid cargo 3 while suppressing sloshing, and compared with the third unit buoyancy unit 22, The first unit buoyancy unit 11 of the outer portion can suppress the sloshing while flowing larger on the liquid cargo 3.

The present invention has been described above with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments falling within the scope of the present invention are possible by those skilled in the art. Accordingly, the true scope of protection of the present invention should be determined by the following claims.

3: liquid cargo 4: sloshing suppressing device
10: buoyancy unit 11, 24: first, second unit buoyancy unit
12, 212, 312, 52: buoyancy blocks 13, 23, 33, 53: connection belt
22 (221, 222): third unit buoyancy unit 30: fastening member
31 unit fastening member 32 connection member
100: land liquid cargo storage tank 101: bottom surface
102: inner shell 103: outer shell
104: suspension ceiling 110: body
120: domed roof 121, 411, 421, 431: buoyant body
122, 412, 422, 432: Foam member 123, 413, 423, 433: Cover
130: pipeline 200: foundation

Claims (10)

As a sloshing suppressor for a land liquid cargo storage tank,
Buoyancy units suspended on liquid cargo stored in the land liquid cargo storage tank; And
Fastening members connecting the buoyancy units
Including;
The buoyancy units,
Have at least two volumes,
The buoyancy units,
A first unit buoyancy unit of the first volume, and
A second unit buoyancy unit having a second volume greater than a first volume of the first unit buoyancy unit,
The first unit buoyancy unit is disposed in an outer portion of the land liquid cargo storage tank,
The second unit buoyancy unit is disposed inside the first unit buoyancy units at a central portion in the land liquid cargo storage tank.
Sloshing arrester for onshore liquid cargo storage tanks.
The method of claim 1,
The cross section of the land liquid cargo storage tank is
Formed into a circle,
The buoyancy units
It is formed in a circular or donut shape as a whole to cover the surface of the liquid cargo stored in the land liquid cargo storage tank
Sloshing arrester for onshore liquid cargo storage tanks.
delete 3. The method of claim 2,
The buoyancy units,
Further comprising third unit buoyancy units having a third volume between the first volume and the second volume,
The third unit buoyancy units are arranged in order of decreasing volume from the central portion to the outer portion.
Sloshing arrester for onshore liquid cargo storage tanks.
5. The method of claim 4,
The buoyancy units,
Disposed in the order of the first unit buoyancy unit, the third unit buoyancy unit and the second unit buoyancy unit, from the outer portion to the central portion along the radial direction in the land liquid cargo storage tank,
Sloshing arrester for onshore liquid cargo storage tanks.
3. The method of claim 2,
A first volume of the first unit buoyancy unit forms a unit volume,
The second volume of the second unit buoyancy unit is a multiple of the first volume
Sloshing arrester for onshore liquid cargo storage tanks.
5. The method of claim 4,
A first volume of the first unit buoyancy unit forms a unit volume,
The second volume of the second unit buoyancy unit is a multiple of the first volume,
The third volume of the third unit buoyancy units is between the first volume and the second volume and is a multiple of the first volume.
Sloshing arrester for onshore liquid cargo storage tanks.
The method of claim 7, wherein
The first unit buoyancy unit is disposed in an outer portion of the land liquid cargo storage tank,
The second unit buoyancy unit is disposed in the center portion in the land liquid cargo storage tank,
The third unit buoyancy units,
From the center portion to the outer portion is arranged in order of decreasing volume
Sloshing arrester for onshore liquid cargo storage tanks.
5. The method of claim 4,
The buoyancy unit,
A connecting belt installed in the buoyancy block to form a connecting ring at both ends,
The buoyancy block comprises:
Buoyant body with buoyancy,
Foam member surrounding the buoyancy body, and
A cover covering the foam member
Including;
The buoyancy body of the second unit buoyancy unit and the buoyancy body of the third unit buoyancy unit are
It is formed longer than the buoyancy body of the first unit buoyancy unit
Sloshing arrester for onshore liquid cargo storage tanks.
10. The method of claim 9,
The first unit buoyancy unit is a buoyancy body formed of a sphere or a rectangular parallelepiped,
The second unit buoyancy unit and the third unit buoyancy unit to form a buoyancy body in a cylinder or a square column
Sloshing arrester for onshore liquid cargo storage tanks.

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