KR20130118051A - Anti sloshing apparatus for a liquid storage tnak on the land - Google Patents

Abstract

PURPOSE: An anti-sloshing device for a liquid cargo storage tank on the land is provided to effectively control the sloshing of liquid cargo stored in a liquid cargo storage tank using multiple buoyancy blocks floating on the liquid cargo. CONSTITUTION: An anti-sloshing device (10) for a liquid cargo storage tank on the land comprises multiple buoyancy blocks (110), connection units, and a first opening (170). The buoyancy blocks are arranged on liquid cargo to cover a portion of the surface of the liquid cargo stored in a liquid cargo storage tank. The connection units connect the buoyancy blocks to each other. The buoyancy blocks are not installed in the first opening to expose a portion of the liquid cargo to the outside. [Reference numerals] (AA) Second direction; (BB) First direction

Description

TECHNICAL FIELD [0001] The present invention relates to a sloshing suppressing device for a liquid landfill storage tank,

The present invention relates to a sloshing suppressor for a terrestrial 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 liquids such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), crude oil and the like, in order to keep the cargo at low temperature or high pressure, Type storage tanks are being manufactured.

One of the main load conditions in the manufacture of such a liquid cargo storage tank is a sloshing problem. Sloshing is a phenomenon in which a liquid cargo is a liquid cargo having a free surface due to shaking of a storage tank due to an external factor such as an earthquake, Refers to the behavior of a fluid which causes a strong impact on the inner wall of a storage space (i.e., a liquid cargo storage tank) while rapidly shaking, and such sloshing is considered from the beginning of the production of a liquid cargo storage tank.

Thus, the shape of the liquid cargo storage tank has been designed to minimize sloshing by liquid cargo and to withstand expected sloshing loads. 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 has proposed a sloshing suppression device for controlling the flow of a liquid cargo, for example, a liquid fuel, in Korean Patent No. 1043622 (Prior Art 1) There is proposed a sloshing suppressing device comprising a plurality of buoyant members having buoyancy to float, a foam member having an open cell structure for absorbing the liquid and surrounding the buoyancy member, and connecting means for connecting the adjacent buoyancy members to each other There is a bar.

Prior Art 1: Korean Patent No. 1043622

The embodiments of the present invention are intended to provide a sloshing suppression device that effectively suppresses sloshing of a liquid cargo storage tank installed on the land and has a simple and stable connection structure.

According to an aspect of the present invention, there is provided a sloshing suppressing device installed inside a land liquid storage tank, comprising: a buoyancy block disposed in a plurality of positions on the liquid cargo so as to cover a part of a surface of the stored liquid cargo; There is provided a sloshing suppressing device comprising a connecting means for interconnecting blocks and a first opening on which the buoyancy block is not installed to expose a part of the surface of the liquid cargo on the surface of the liquid cargo.

In this case, the buoyancy block may include: a buoyant body providing buoyancy to the buoyancy block; A first foam member surrounding the buoyancy member and having an open cell structure; And a first cover surrounding the foam member.

At this time, the connecting means is provided on the buoyancy block so as to cross the surface of the buoyancy block. And a coupling member connecting the connection belt of the buoyancy block and the connection belt of another buoyancy block adjacent to the buoyancy block.

At this time, the transverse section of the terrestrial liquid cargo storage tank is formed in a circular shape, and the sloshing suppressing device may be formed in a circular shape so as to cover a circular cross section of the terrestrial liquid cargo storage tank.

At this time, the first opening may be located in the central region of the surface of the liquid.

In this case, the sloshing suppressor may further include a second opening portion on the surface of the liquid cargo, wherein the buoyancy block is not installed to expose a part of the edge region of the liquid cargo surface.

At this time, the sloshing suppressing device may further include a plurality of third openings arranged to be spaced apart from each other.

At this time, the sloshing suppressing device may include a plurality of buoyancy blocks that sink into the liquid cargo and are installed at the periphery of the plurality of buoyancy blocks.

At this time, the plurality of no-buoyancy blocks may be continuously installed along the periphery of the plurality of buoyancy blocks.

At this time, the no-buoyancy block may include a second foam member having an open cell structure to absorb the liquid cargo and a second cover surrounding the second foam member.

Embodiments of the present invention can effectively suppress sloshing of liquid cargo stored in a land-based liquid cargo storage tank of a ship by a plurality of buoyancy blocks floated on the liquid cargo.

Embodiments of the present invention can facilitate the assembly and maintenance of the sloshing suppressing device by not providing the buoyancy block at some positions so as to expose a part of the surface of the liquid cargo where the sloshing suppressing device is installed.

The embodiments of the present invention provide a buoyancy block at the periphery of a sloshing suppression device composed of a plurality of buoyancy blocks, so that the force of pressing the liquid cargo at the periphery of the sloshing suppression device becomes stronger, Can be effectively suppressed.

1 is a schematic block diagram of a terrestrial liquid cargo storage tank.
2 is a cross-sectional view illustrating a sloshing suppression apparatus according to a first embodiment of the present invention installed in a land liquid storage tank.
3 is a plan view showing a state in which the sloshing suppression device according to the first embodiment of the present invention is installed in a land liquid storage tank.
4 is an enlarged view of a portion A in Fig.
5 is a perspective view showing a buoyancy block of a sloshing suppression device according to an embodiment of the present invention.
6 is an incision view showing the inside of a buoyancy block of a sloshing suppression device according to an embodiment of the present invention.
7 is a view showing a load acting state of the sloshing suppressing apparatus according to an embodiment of the present invention.
8 is a longitudinal sectional view showing a modification of the buoyant body of the sloshing suppression device according to the embodiment of the present invention.
9 and 10 are cross-sectional views showing a modification of the buoyant body of the sloshing suppression device according to the embodiment of the present invention.
11 is a front view showing a connection belt of the sloshing suppression device according to an embodiment of the present invention.
12 is a plan view showing a fastening member of a sloshing suppression device according to an embodiment of the present invention.
13 is a plan view showing a state where a cover member is installed on a fastening member of a sloshing suppression device according to an embodiment of the present invention.
14 is a plan view showing a modification of the fastening member of the sloshing suppression device according to the embodiment of the present invention.
15 is a plan view showing a modification of the connection belt and the fastening member of the sloshing suppression device according to the embodiment of the present invention.
16 and 17 are views showing a modification of the fastening member of the sloshing suppression device according to the embodiment of the present invention.
18 to 21 are plan views showing a modification of the sloshing suppression apparatus according to an embodiment of the present invention.
22 is a partial plan view showing a state in which the sloshing suppression device according to the second embodiment of the present invention is installed in a land liquid storage tank;
23 is an incision drawing showing the inside of a buoyancy block installed in the sloshing suppression apparatus according to the second embodiment of the present invention.
24 to 27 are plan views showing a modification of the sloshing suppressing apparatus according to the second 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.

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

The sloshing suppression device according to an embodiment of the present invention may be installed in a liquid cargo storage tank 1 for storing liquid cargo, for example, LNG, installed on the land as shown in FIG.

1, the land liquid storage tank 1 includes a base portion 9 provided on the ground, a storage tank body 3 provided on the base portion 9, and a ceiling portion provided on the storage tank body 3, (5).

The storage tank body 3 has a bottom surface 8 provided on the base portion 9, an inner shell 7 provided on the bottom surface 8 and forming the tank inner wall, And an outer shell 6 forming an outer wall of the outer shell 6. At this time, the inner shell 7 and the outer shell 6 of the terrestrial liquid cargo storage tank 1 may have a circular section.

The ceiling portion 5 includes a domed roof 5b and a suspended deck 5a forming a ceiling inside the tank below the domed roof 5b.

A pipeline (not shown) and a pump (not shown) for conveying the liquid cargo into the land liquid storage tank 1 are provided adjacent to the inner shell 7, A spray nozzle line (not shown) is installed.

The terrestrial liquid cargo storage tank 1 may be formed so that it can be kept warm and pressurized while storing the liquid cargo according to the characteristics of the liquid stored therein. The liquefied natural gas may be stored in the terrestrial liquid storage tank 1 according to an embodiment of the present invention.

Accordingly, the sloshing suppressing apparatus 10 for a terrestrial liquid cargo storage tank according to an embodiment of the present invention can suppress sloshing to suppress sloshing of liquefied natural gas installed in the terrestrial liquid cargo storage tank 1, The device will be described. However, the internal structure of the terrestrial liquid cargo storage tank 1 and the liquid cargo stored therein are not limited thereto, and the sloshing suppression device according to an embodiment of the present invention may be applied to various types of liquid cargo It can be used as an apparatus for suppressing the sloshing of the storage tank and the liquid cargo stored therein.

2 to 4, the sloshing suppression apparatus 10 according to the present embodiment includes a plurality of sloshing suppressing apparatuses 10 arranged on a liquid cargo 2 stored in a liquid cargo storage tank 1, And connecting means 130 connecting the block 110 and the buoyancy block 110 to each other.

At this time, the buoyancy block 110 is formed to float on the surface of the liquid cargo stored inside the circular terrestrial liquid cargo storage tank. 3 and 4, the buoyancy block 110 has a cuboid shape. According to one embodiment of the present invention, the plurality of buoyancy blocks are arranged adjacently to each other in a first direction (lateral direction as viewed in Fig. 3) and in a second direction perpendicular to the first direction. In this case, the first direction may be the north-south direction or the east-west direction, but the orientation in the first direction is not limited thereto. A more detailed description of the buoyancy block will be given later.

4, the connecting means for connecting the buoyancy block 110 and the buoyancy block 110 to each other includes a connection belt 130 and a connection belt 130 formed on the surface of the buoyancy block 110, And a fastening member 150 for fastening. A more detailed description thereof will be described later.

According to one embodiment of the present invention, the buoyancy blocks 110 of the sloshing inhibitor 10 suspended on the liquid cargo of the land-based liquid cargo storage tank 1, as seen in Figure 3, May be arranged in a donut form that has been emptied.

The sloshing suppression device according to an embodiment of the present invention is formed in a donut shape so that the center is hollowed out when a circular spray nozzle is installed at the center of a suspended ceiling in a circular land liquid storage tank, So as to avoid interference of the suppression device. If the spray nozzle is not located in the center of the suspension ceiling, the sloshing suppression device may be of a circular shape without an empty center. Meanwhile, the sloshing suppression apparatus according to various embodiments of the present invention may have openings formed at various positions on the inner side portion and the peripheral portion of the sloshing suppression apparatus as well as the center portion, and a detailed description thereof will be described later.

5 and 6, a specific configuration of the buoyancy block 110 forming the sloshing suppression device according to an embodiment of the present invention will be described.

FIG. 5 is a perspective view showing a buoyancy block 110 of a sloshing suppression apparatus 10 according to an embodiment of the present invention, and FIG. 6 is a perspective view of a buoyancy block 110 of a sloshing suppression apparatus 10 according to an embodiment of the present invention. (110).

The buoyancy block 110 has buoyancy to float on the liquid cargo 2 stored in the land liquid storage tank 1. More specifically, as shown in FIG. 6, A first foam member 114 that surrounds the buoyant body 112 and a first cover 116 that surrounds the first foam member 114. The first foam member 114 may include a buoyant body 112 having a buoyancy as much as possible.

As shown in FIGS. 5 and 6, the buoyancy block 110 may have a cube shape or a rectangular parallelepiped shape having a length of 1.0 to 1.5 m in height, a height of 1.0 to 1.5 m, The size and shape may be variously changed according to the size of the substrate.

Although not shown, the buoyancy block 110 may have, for example, a hexagonal columnar shape, in which case the adjacent buoyancy blocks 110 may be arranged such that the sides of the hexagonal column face each other.

As shown in FIG. 6, the buoyant body 112 may have a spherical shape, an ellipsoid or various other structures. The buoyant body 112 can have buoyancy to float on the liquid cargo 2. When the liquid cargo 2 is natural liquefied gas (LNG), it is possible to fill the gas which can not be converted into liquid phase even at a very low temperature A hollow space having an airtight space may be formed.

The buoyant body 112 may have buoyancy due to such structural characteristics, and may have buoyancy depending on the characteristics of the material.

The buoyant body 112 may be made of a material having such a strength that the shape is not changed by the buoyant force. In order to sufficiently perform its function even in the extremely low temperature state by the liquid cargo 2 such as LNG, Alloy or other alloy.

In addition, the buoyant body 112 may be formed of a foam material having a closed cell structure. That is, the buoyant body 112 itself may be made of a thin foamed material instead of having a hollow structure.

Here, the closed cell structure has a buoyancy structure because the liquid does not permeate into the buoyant body 112. As the buoyant body 112 is made of the foamed material of the closed cell, the thermal load, compressive load Even if cracks are generated on the surface of the buoyant body 112, the buoyant body can stably maintain buoyancy because the liquid body 2 can not penetrate into the buoyant body 112.

In this case, the buoyant body 112 may be formed of a polymer material including any one of phenol resin, melamine resin, or synthetic resin thereof, which can maintain elasticity even at a cryogenic temperature at which the liquid material 2 such as LNG is kept at a liquid phase . These resins can maintain physical properties similar to room temperature even at a cryogenic temperature.

As such, the buoyant body 112 does not increase brittleness by maintaining its elasticity even at cryogenic temperatures, i.e., at cryogenic temperatures, so that the buoyant body 112 is broken due to the collision between adjacent buoyancy blocks 110 .

As shown in FIG. 6, the first foam member 114 surrounds the outer surface of the buoyant body 112, and is a member that forms the outer shape of the buoyancy block 110, and the overall shape thereof may be a rectangular parallelepiped. In addition, although not shown, the first foam member 114 may have various columnar shapes such as a hexagonal columnar shape.

The first foam member 114 may have an open cell structure to allow the liquid cargo 2 to seep into the first foam member 114 to more effectively prevent sloshing. Here, the open cell structure has a structure in which a plurality of holes penetrating the inside and the outside of the first foam member 114 are formed, so that the surface area of the first foam member 114 can be maximized, The absorption of the liquid cargo 2 can be promoted.

Thus, by forming the first foam member 114 in an open cell structure so that the liquid cargo 2 can permeate into the first foam member 114, the weight of the buoyancy block 110 is increased, The block 110 floats in a partially locked state on the surface of the liquid cargo 2 and can cover the free surface of the liquid cargo 2. [ Thus, sloshing (i.e., fluid flow) caused by the liquid cargo 2 in the land liquid storage tank 1 can be more effectively suppressed.

The first foam member 114 may be made of, for example, synthetic resin. Particularly, the first foam member 114 is made of a phenol resin, a melamine resin (e.g., phenol resin) which can maintain elasticity so that even at a cryogenic temperature at which a cryogenic liquid material 2 such as LNG is kept in a liquid state, Or a synthetic resin of any of these materials.

The first cover 116 encloses the first foam member 114 as shown in FIG. 6, thereby preventing the first foam member 114 from being broken by an external force, 1, it is possible to prevent the liquid contents 2 from being contaminated by the debris of the foam member 114.

The first cover 116 may be made of a material having durability at room temperature even at a very low temperature, and may be made of, for example, polyarylate fiber.

7 is a view showing a state in which a load F1 is applied to the sloshing suppression apparatus 10 according to an embodiment of the present invention.

7, when the liquid cargo 2 is filled in the terrestrial liquid cargo storage tank 1 and is in a full state, the liquid cargo 2 is supplied to the buoyancy block 110 by the flow of the liquid cargo 2, A compressive load F1 may be applied to the first foam member 114 and the buoyant member 112 by such a compressive load F1. The buoyant member 112 or the first foam member 114 may be damaged by such a concentrated load.

In contrast, the structural stability of the buoyancy block 110 can be improved by changing the shape or material of the buoyant body 112 as shown in FIGS.

Here, FIG. 8 is a longitudinal sectional view showing a modification of the buoyancy body 112 of the sloshing suppression apparatus 10 according to an embodiment of the present invention, and FIGS. 9 and 10 are cross-sectional views of this modification.

As shown in Fig. 8, the buoyant body 112 may be formed such that its longitudinal section has an elliptical shape. 8, when the load F2 acts on the buoyancy block 110 by reducing the vertical height of the buoyant body 112 by configuring the buoyant body 112 so that the longitudinal section has an elliptical shape, It is possible to minimize the concentrated load applied to the first foam member 114 by the body 112.

In this case, the cross section of the buoyant body 112 may have a circular shape as shown in Fig. 9, or may have a rectangular shape as shown in Fig.

And, as shown in FIG. 10, when the cross section of the buoyancy body 112 has a generally rectangular shape, the edge portion of the buoyancy body 112 may have a curved shape. As such, the corner of the buoyant member 112 has a curved shape, so that damage to the first foam member 114, which may be caused by the edge of the buoyant member 112, can be prevented.

11 is a front view showing the connection belt 132 of the sloshing suppression apparatus 10 according to an embodiment of the present invention. 12 is a plan view showing a fastening member 134 of the sloshing suppressing apparatus 10 according to an embodiment of the present invention.

Hereinafter, a concrete configuration of the connecting means 130 for connecting the buoyancy blocks of the sloshing suppression device according to the embodiment of the present invention will be described with reference to FIGS. 11 and 12. FIG.

Referring to FIG. 11, the connecting unit 130 includes a connecting belt 132, a plurality of buoyancy blocks 110 connected to each other to connect the buoyancy blocks 110 to each other, And a fastening member 134.

The connection belt 132 is installed in each of the buoyancy blocks 110 so as to connect the buoyancy blocks 110 to each other.

The connection belt 132 may be installed on the surface of the buoyancy block 110 so as to traverse the surface of the buoyancy block 110, as shown in Figs. 4 and 11, the connection belt 132 may be installed on one side and the other side of the buoyancy block 110, respectively, and may extend through one side of the buoyancy block 110 and the center of the other side. Can be installed.

The connection belt 132 is not simply installed at the end of the buoyancy block 110 or in a limited partial area of the buoyancy block 110 but is installed across the surface of the buoyancy block 110 as described above, The load applied to the interface between the connection belt 132 and the buoyancy block 110 by the flow of the buoyancy block 110 is maximized by the surface area of the buoyancy block 110 So that the structural stability of the sloshing suppressing apparatus 10 can be remarkably improved as a result.

The connection belt 132 may be made of the same material as the first cover 116 of the buoyancy block 110 and the second cover 126 to be described later, The cover 116 and the second cover 126, respectively. Needless to say, the connection belt 132 may be provided on the surface of the buoyancy block 110 using an adhesive or the like.

5, the pair of connecting belts 132 may be arranged in a pair such that the pair of connecting belts 132 intersect with each other, The buoyancy block 110 may be installed on one side and the other side of the buoyancy block 110, respectively.

As described above, the pair of connecting belts 132 are provided so as to intersect with each other, whereby a plurality of the buoyancy blocks 110 arranged in a lattice structure as shown in FIG. 4 can be effectively connected in the lateral direction and the longitudinal direction.

5, the connection belts 132 may be formed of a pair of unit belts 132a. The unit belts 132a may be disposed side by side and spaced apart from each other by a predetermined distance .

By disposing the pair of unit belts 132a apart from each other in this way, it is possible to provide a space in which the fastening member 134 to be described later can be more easily engaged. This will be described more specifically in the following description of the fastening member 134.

On the other hand, connection rings 132b may be formed at both ends of the connection belt 132, as shown in FIGS. As shown in FIG. 4, as the fastening members 134 are fastened to the adjacent linking rings 132b, adjacent buoyancy blocks 110 can be connected to each other.

5 and 11, the connection ring 132b is bent in such a manner that a part of the connection belt 132 is bent in a state in which the connection belt 132 is curved such that a part of the connection belt 132 is opposed to the other part May be formed by joining with another part.

That is, as shown in FIG. 11, a part of the connecting belt 132 is overlapped with another part of the connecting belt 132, and a part and another part of the connecting belt 132 are joined to each other by sewing or the like, The connecting ring 132b may be formed at the end of the connecting belt 132 without using any additional member of the connecting belt 132. [

12, the coupling member 134 may connect adjacent pair of coupling rings 132b so that the adjacent buoyancy blocks 110 are connected to each other. As shown in FIG. 12, the fastening members 134 may be composed of a pair of unit fastening members 134a arranged to be symmetrical to each other.

That is, as shown in FIG. 12, the fastening member 134 may be formed of a pair of unit fastening members 134a having a curved shape so that both ends can be inserted into the pair of adjacent connecting rings 132b And the pair of unit fastening members 134a are arranged so that both ends of the unit fastening members 134a face each other and can be fastened to each other by a means such as a bolt 134b or the like.

More specifically, the pair of unit fastening members 134a may have a U-shape as shown in FIG. 12, and both ends of the pair of unit fastening members 134a may be connected to a pair of adjacent From the upper part to the lower part and from the lower part to the upper part, respectively, with reference to Fig. 12 on the ring 132b.

12, both end portions of the pair of unit fastening members 134a inserted into the adjacent pair of linking rings 132b are separated from each other by a space distance between the pair of unit belts 132a And the pair of unit fastening members 134a can be easily fastened by the bolts 134b or the like in this space.

13 is a plan view showing a state in which a cover member 140 is installed on a fastening member 134 of a sloshing suppression apparatus 10 according to an embodiment of the present invention.

The cover member 140 may cover the fastening member 134 to prevent contact between the fastening member 134 and the land liquid storage tank 1, as shown in FIG. The fastening member 134 may be made of aluminum, SUS, or other composite material so that it can be used at a very low temperature. Therefore, by providing the cover member 140 on the fastening member 134, the fastening member 134 may be pushed against the inner wall of the land liquid storage tank 1 by the flow of the sloshing suppressing device 10, It is possible to prevent the liquid storage tank 1 from being damaged.

Meanwhile, according to the modification of the present invention, ropes or yarns other than the above-described pair of unit fastening members 134a may be used as fastening members for interconnecting the connection belts.

14 is a plan view showing a modification of the fastening member 134 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

As shown in FIG. 14, a rope may be used as the fastening member 134 to connect the pair of adjacent connecting rings 132b through the pair of adjacent connecting rings 132b.

That is, the fastening member 134 may be connected to the adjacent pair of connection rings 132b by passing the adjacent pair of connection rings 132b, and then connecting both ends of the fastening member 134 by various coupling means. The rope may be made of a material such as polyacrylate fiber in the same manner as the connection belt 132.

By using the rope having the same material as the connecting belt 132 as the fastening member 134 as described above, the fastening member 134 can be moved along the flow of the sloshing suppressing apparatus 10 without the separate cover member 140, It is possible to prevent the land liquid-liquid storage tank 1 from being damaged by colliding with the inner wall of the cargo storage tank 1.

15 is a plan view showing a modification of the connection belt 132 and the fastening member 134 of the sloshing suppression device 10 according to the embodiment of the present invention.

As shown in Fig. 15, as the fastening member 134, a thread that can connect the ends of the pair of adjacent connecting belts 132 by sewing using a portable sewing machine or the like can be used.

In this case, a separate connecting ring 132b is not formed at both ends of the connecting belt 132, and both ends of the connecting belt 132 may be extended to protrude to the outside of the buoyancy block 110. In this way, the end portions of the connection belt 132 extending to the outside of the buoyancy block 110 can be connected to each other by the fastening member 134 according to the sewing method after they are superposed on each other.

16 and 17 are views showing a modification of the fastening member of the sloshing suppression device according to the embodiment of the present invention.

As shown in Figs. 16 and 17, the fastening member 134 may be an elastic wire member wound to have a coil structure, and adjacent outer circumferential surfaces are in close contact with each other. That is, the fastening member 134 is formed by winding an elastic wire having elasticity such as SUS, aluminum, invar or the like in the form of a coil so as to have a structure like a so-called key chain.

The one end of the fastening member 134 opened to be inserted into the connection loop 132b of the connection belt 130 is inserted into the connection loop 132b and then inserted into the connection loop 132b again, It can be brought into close contact with the adjacent outer circumferential surface, whereby it is possible to effectively prevent the fastening from being released by the heat shrinkage, expansion or double motion.

According to various modifications of the first embodiment of the present invention, as shown in FIGS. 18 to 21, the buoyancy block 110 may be formed to cover only a part of the surface of the liquid cargo 2, ) Can be variously modified.

That is, according to the first embodiment of the present invention, the buoyancy block 110 is configured such that a part of the surface 2 of the liquid cargo 2 is exposed on the surface of the liquid cargo 2 as shown in Figs. 18 to 21 The first opening 170, the second opening 180, and the third opening 190 in which the buoyancy block is not positioned.

The first opening 170 may be located in the central region of the surface of the liquid cargo 2 as shown in Figs. 18-19.

The sloshing phenomenon can mainly occur in an area adjacent to the inner shell of the terrestrial liquid cargo storage tank 1. [ Therefore, as in the embodiment of the present invention, the buoyancy block 110 is used to cover the edge adjacent to the inner shell of the land liquid storage tank 1, and the central area of the surface of the liquid storage 2 has a first opening 170), it is possible to effectively reduce the cost of installing the sloshing suppression unit while maintaining the sloshing suppression function as it is. Since the manufacturing cost of each of the buoyancy blocks constituting the sloshing suppression device is small and hundreds to several thousands of buoyancy blocks are used to manufacture the sloshing suppression device, It is possible to reduce the manufacturing cost of the suppression device.

In this case, in this embodiment, the ratio of the length of one side of the first opening (W2 in Fig. 18) to the diameter W1 of the land liquid storage tank 1 or the diameter of the land liquid storage tank 1 The ratio of the diameter of the first opening 170 to the diameter W1 of the first opening 170 (W4 in Fig. 19) may be 0.1 to 0.7. At this time, if the first opening 170 is formed in a circular shape, the sloshing suppressor may not contact the spray line installed in the suspended ceiling of the land liquid storage tank even if it swings in the land liquid storage tank And may have a minimum diameter W3.

When the ratio of the ratio of the diameter W4 of the first opening 170 to the diameter W1 of the land liquid storage tank 1 or the ratio of the length W2 of one side is larger than 0.7, The sloshing suppressing effect may be lowered.

At this time, the first opening 170 may have various shapes as shown in Figs. 18 to 19. 18 to 19, there is shown a structure in which the first openings 170, each having a rectangular shape and a circular shape, are provided in the central region of the surface of the liquid cargo 2. In this case, the first opening portion may have various shapes other than a rectangular shape and a circular shape.

On the other hand, as shown in Figs. 18 and 19, a buoyancy block is provided on the surface of the liquid cargo 2 in such a manner as to expose a part of the edge region of the surface of the liquid cargo 2, The second openings 180 which are not positioned can be formed. 20 and 21, the second opening 180 may be formed as a rectangular space having a length W6 of one side.

The second opening 180 may be formed for installing equipment such as a pump tower in the land liquid cargo storage tank 1 and the length W6 of one side of the second opening may be formed for example in the pipeline of the pump tower 4). ≪ / RTI >

By arranging the buoyancy block 110 such that a part of the edge region is exposed along with the central region of the surface of the liquid cargo 2 as described above, the manufacturing cost and the maintenance and repair cost of the buoyancy block 110 can be more effectively reduced, The vibration suppression device is symmetrically formed in the radial direction or in the left-right direction with respect to the center so that the force balance can be maintained.

The second openings 180 may be formed at one position of the sloshing suppressor as shown in Figs. 18 and 19, or may be formed as a plurality as shown in Figs. 20 and 21 to form a plurality of second openings 180 may be arranged to be symmetrical with respect to the first opening 170 disposed on the central region of the surface of the liquid material 2.

When the second openings 180 are disposed symmetrically with respect to the first openings 170 disposed on the central region of the surface of the liquid cargo 2, The center of gravity of the restraining device 10 can be maintained uniformly throughout.

According to an embodiment of the present invention, as shown in FIG. 20, a size smaller than the first openings 170 shown in FIGS. 18 and 19, for example, three buoyancy blocks in the first direction X A plurality of third openings 190 formed by three void spaces of the second direction buoyancy block may be arranged to be spaced apart from each other in the first direction and the second direction. Since the third openings 190 are formed in the sloshing restraining device as a plurality of empty spaces, the operator can easily perform the maintenance work of the buoyancy blocks at the positions where the third openings 190 are installed Can be performed.

22 is a partial plan view showing a state in which the sloshing suppression device according to the second embodiment of the present invention is installed in a land liquid storage tank; 23 is an incision drawing showing the inside of a buoyancy block installed in the sloshing suppression apparatus according to the second embodiment of the present invention. 24 to 27 are plan views showing a modification of the sloshing suppressing apparatus according to the second embodiment of the present invention.

Hereinafter, the sloshing suppressing apparatus according to the second embodiment of the present invention will be described with respect to the same components as those of the first embodiment. Explain.

According to a second embodiment of the present invention, as shown in Fig. 22, a plurality of buoyancy blocks 110 are disposed on a liquid cargo 2 stored in a terrestrial liquid cargo storage tank 1, these buoyancy blocks 110 A plurality of buoyancy blocks 120 disposed along the periphery of the buoyancy block 120 and connecting means for connecting the plurality of buoyancy blocks 110 and the buoyancy blocks 120 to each other, (10 ') is presented.

According to the second embodiment of the present invention, sloshing of the liquid cargo 2 by the plurality of buoyancy blocks 110 floating on the liquid cargo 2 stored in the terrestrial liquid cargo storage tank 1 sloshing, or fluid flow).

More specifically, the sloshing suppression apparatus 10 'according to the second embodiment of the present invention includes a plurality of buoyancy blocks 120 disposed along the periphery of the plurality of buoyancy blocks 110, Since a heavier load is applied from the peripheral portion to the downward portion than the region, the peripheral portion of the sloshing suppressing device can be minimized and the sloshing suppressing ability of the sloshing suppressing device can be improved.

In the second embodiment of the present invention, the configuration of the buoyancy block and the connecting means is similar to that of the first embodiment described above, and thus a detailed description thereof will be omitted, Will be described.

23 is a cutaway view showing the inside of the buoyancy block 120 of the sloshing suppression apparatus 10 'according to the second embodiment of the present invention.

23, the no buoyancy block 120 includes a second foam member 124 having an open cell structure to absorb the liquid cargo 2, a second cover 126 surrounding the second foam member 126, And is formed so as not to include a buoyant body installed inside the buoyancy block.

The buoyancy block 120 may have a shape corresponding to the buoyancy block 110, for example, a cubic or rectangular parallelepiped shape. The size and shape of the buoyancy block 120 may vary depending on the size of the inner space of the land liquid storage tank 1 can be changed. In this case, although not shown, the no-buoyancy block 120 may have various columnar shapes such as a hexagonal columnar shape.

The second foam member 124 of the no-buoyancy block 120 is a member forming the outer shape of the no-buoyancy block 120 as shown in Fig. 23, and similar to the first embodiment, And may be made of a material having an open cell structure capable of absorbing the liquid cargo 2 so as to sink into the liquid cargo 2.

By forming the second foam member 124 into the open cell structure so that the liquid cargo 2 can permeate into the second foam member 124, the liquid cargo seeps into the no-buoyancy block 120, 2 As the foam member contains liquid cargo, a load that sinks below the water surface acts on the no-buoyancy block. Accordingly, the peripheral portion of the sloshing suppressing device is struck below the surface of the liquid cargo by the plurality of floating blocks (120) connected along the periphery of the plurality of buoyancy blocks (110).

In this case, since the no-buoyancy block 120 does not include the buoyant body 112 for the buoyancy force, the second foamed body 124 is separated from the liquid body by the space in which the buoyant body 112 is absent 2). ≪ / RTI > Therefore, the no-buoyancy block 120 is heavier than the buoyancy block in the liquid cargo, and thus the flow of the liquid cargo 2 can be more effectively suppressed.

On the other hand, the second cover 126 is formed so as to prevent the second foam member 124 from being broken by an external force by surrounding the second foam member 124, as shown in Fig. The second cover 126 may have the same structure as the first cover 116 as described in the first embodiment, and a detailed description thereof will be omitted.

The sloshing suppression device 10 'according to the second embodiment of the present invention is similar to the first embodiment in that the sloshing suppression device 10' is constructed such that the buoyancy block 110 covers only a part of the surface of the liquid cargo 2, A first opening 170, a second opening 180, and a third opening 190. Figs. 24 to 27 are plan views showing a modification of the sloshing suppression apparatus according to the second embodiment of the present invention, corresponding to Figs. 18 to 21 of the first embodiment. Fig.

The sloshing suppressing apparatus 10 'according to the second embodiment shown in Figs. 24 to 27 is different from the sloshing suppressing apparatus according to the first embodiment shown in Figs. 18 to 21 in that the sloshing suppressing apparatus 10' The slosh suppressing device according to the first embodiment shown in Figs. 18 to 21 can be formed in the same manner as the slosh suppressing device except for the structure in which the block 120 is installed.

At this time, in the sloshing suppression apparatus 10 'according to the second embodiment shown in FIGS. 24 to 27, the number and position of the no-buoyancy blocks 120 located at the periphery of the sloshing suppression apparatus are The size and shape of the buoyancy block, the size of the sloshing formed in the land liquid storage tank, and the like.

For example, although the no buoyancy block 120 is shown as being continuously disposed around the circumference of the sloshing inhibiting device in FIGS. 24-27, Or may be installed non-continuously in the portion.

Further, in the second embodiment of the present invention, the no-buoyancy blocks may be arranged in a row in the periphery of the sloshing suppressor 10 ', as well as in two or more rows.

According to the embodiment of the present invention, there is an area in which the buoyancy block is not installed at some position so as to expose a part of the surface of the liquid cargo on which the sloshing suppressing device is installed, thereby facilitating the assembly and maintenance of the sloshing suppression device can do.

According to the embodiment of the present invention, the buoyancy block is provided at the periphery of the sloshing suppressing device composed of a plurality of buoyancy blocks, so that the force pressing the liquid cargo at the periphery of the sloshing suppression device becomes stronger, The sloshing can be suppressed more effectively.

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 tank 2: Liquid cargo
10 10 ': Sloshing suppression device 110: Buoyancy block
112: buoyant body 114: first foam member
116: first cover 120: no-buoyancy block
124: second foam member 126: second cover
130: connecting means 132: connecting belt
134: fastening member 140: cover member
170: first opening 180: second opening
190: third opening

Claims (10)

A sloshing suppressor installed inside a land liquid storage tank,
A plurality of buoyancy blocks disposed on the liquid carrier to cover a portion of the surface of the stored liquid carrier;
Connecting means interconnecting the plurality of buoyancy blocks; And
And a first opening in which the buoyancy block is not provided to expose a portion of the surface of the liquid cargo on the surface of the liquid cargo.
The method of claim 1,
The buoyancy block comprises:
A buoyant body providing buoyancy to the buoyancy block;
A first foam member surrounding the buoyancy member and having an open cell structure; And
A sloshing suppression apparatus comprising a first cover surrounding the foam member.
3. The method of claim 2,
The connecting means
A connection belt mounted to the buoyancy block to cross the surface of the buoyancy block; And
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.
The method of claim 3, wherein
The transverse section of the terrestrial liquid cargo storage tank is formed in a circular shape,
Wherein the sloshing suppressing device is formed to have a circular circumferential portion to cover a circular cross-section of the land liquid storage tank.
5. The method of claim 4,
Wherein the first opening is located in a central region of the liquid-containment surface.
5. The method of claim 4,
Further comprising a second opening on the surface of the liquid cargo that is not provided with the buoyancy block to expose a portion of an edge region of the liquid cargo surface.
5. The method of claim 4,
Further comprising a plurality of third openings arranged to be spaced apart from each other. The method according to any one of claims 1 to 7,
And a plurality of buoyant blocks disposed in the periphery of the plurality of buoyancy blocks, the buoyancy blocks submerged in the liquid cargo.
The method of claim 8,
Wherein the plurality of buoyancy blocks are continuously installed along the periphery of the plurality of buoyancy blocks.
The method of claim 9,
Wherein the no-
A second foam member having an open cell structure to absorb the liquid cargo; and
And a second cover surrounding the second foam member.

Images