KR20120061726A - Anti sloshing unit, anti sloshing apparatus and storage structure for liquid cargo having the same - Google Patents

Abstract

PURPOSE: An anti-sloshing unit, an anti-sloshing device having the same, and a liquid cargo storage structure are provided to effectively prevent sloshing of liquid cargo storing in a cargo tank of a ship by multiple buoyancy floating on the liquid cargo, and to connect the multiple buoyancy blocks with a simple and stable connection structure. CONSTITUTION: An anti-sloshing unit comprises a buoyancy block(110) and connection belts(120). The buoyancy block floats on liquid cargo storing in a cargo tank. The connection belts are installed on the buoyancy block across the surface of the buoyancy block. Rings(124) are formed in both ends of the connection belts. A part of the connection belts is adhered to the other part of the connection belts in a state where the connection belts are curved to face the part of the connection belt and the other part thereof so that the rings can be formed.

Description

ANTI SLOSHING UNIT, ANTI SLOSHING APPARATUS AND STORAGE STRUCTURE FOR LIQUID CARGO HAVING THE SAME}

The present invention relates to a sloshing suppression unit, and more particularly to a sloshing suppression unit for suppressing sloshing in a cargo hold, a sloshing suppression apparatus comprising the same and a liquid cargo storage structure.

In general, various types of ships are being manufactured to transport liquid cargo by sea. For example, in order to transfer liquid cargo such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), and crude oil (crude oil), the hull is manufactured according to the characteristics of each cargo, and the cargo is transported at low temperature or high pressure. Special types of cargo hold have been applied to keep it sealed and warm.

One of the major loading conditions in the manufacture of such hulls and cargo holds is sloshing problem. Sloshing is a liquid cargo with a free surface that is stored rapidly while the liquid cargo receives kinetic energy due to the movement of the hull. As referring to the behavior of a fluid causing a strong impact on the inner wall of the space (ie cargo hold), such sloshing is considered from the beginning of the construction of the hull and cargo hold.

As such, the hull and cargo holds have been designed to minimize the sloshing caused by liquid cargo and to withstand the expected sloshing loads. It was necessary to accept conditional operating conditions with a limited loading capacity. Nevertheless, various problems with unexpected damage to cargo holds continue to arise due to the uncertainty of the sloshing load.

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 (open document 1). 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.

Prior Document 1: Korean Registered Patent No. 1043622

Embodiments of the present invention provide a sloshing suppression unit, a sloshing suppression apparatus and a liquid cargo storage structure including the same, which effectively suppress sloshing of liquid cargo stored in a cargo hold of a ship, etc., and have a simple and stable connection structure. To provide.

According to one aspect of the invention, there can be provided a sloshing suppression unit comprising a buoyancy block having buoyancy to float on a liquid cargo stored in the cargo hold, and a connecting belt installed on the buoyancy block to cross the surface of the buoyancy block. have.

Rings may be formed at both ends of the connecting belt.

The loop may be formed by joining a portion of the connecting belt to another portion in a state in which the connecting belt is curved so that a portion of the connecting belt faces the other portion.

The connecting belts are arranged in pairs and can cross each other.

The connection belt may be installed on one side and the other side of the buoyancy block, respectively.

The connecting belt may be composed of a pair of unit belts arranged side by side and spaced apart from each other.

The buoyancy block may include a buoyancy body having a buoyancy force for floating in a liquid cargo; And a foam member having an open cell structure and surrounding the buoyancy body.

The buoyancy block may further include a cover surrounding the foam member.

The buoyancy body may have an elliptical shape in the longitudinal section.

The buoyancy body may have a circular cross section or a rectangular cross section.

When the cross section of the buoyancy body has a square shape, the edge portion of the buoyancy body may have a curved shape.

The buoyancy body may be made of a foam material having a closed cell structure.

The buoyancy body may have a cylindrical shape.

Further, according to another aspect of the present invention, a pair of adjacent pairs of sloshing suppression units described above, which are arranged on a liquid cargo to cover the surface of the liquid cargo stored in the cargo hold, and adjacent sloshing suppression units are connected to each other. A sloshing inhibiting device comprising a fastening member connecting the ends of the connecting belt to each other may be provided.

Rings are formed at both ends of the connecting belt, and the fastening member may connect a pair of adjacent rings to each other.

The loop may be formed by joining a portion of the connecting belt to another portion in a state in which the connecting belt is curved so that a portion of the connecting belt faces the other portion.

The fastening member may include a pair of unit fastening members having a curved shape so that both ends are respectively inserted into a pair of adjacent rings, and the pair of unit fastening members may be fastened to each other by being disposed opposite to each other. have.

The sloshing suppressing device may further include a cover member covering the fastening member to prevent contact between the fastening member and the cargo hold.

The fastening member may include a rope connecting the adjacent pair of rings to each other through the pair of adjacent rings.

The fastening member may be made of the same material as the connecting belt.

The fastening member may include an elastic wire rod wound to have a coil structure and adjacent outer circumferential surfaces are in close contact with each other. The fastening member may include a thread for connecting the ends of a pair of adjacent connecting belts to each other by sewing. have.

The sloshing suppression unit may be arranged in a lattice structure.

The sloshing suppression unit may be arranged such that a first opening is provided on the surface of the liquid cargo to expose a portion of the surface of the liquid cargo.

The first opening may be located in the central region of the liquid cargo surface.

The ratio of the width of the first opening to the width of the cargo hold may be between 0.6 and 0.7.

The first opening may have a circular shape, an elliptic shape or a square shape.

The first opening may include a plurality of unit openings disposed to be spaced apart from each other.

The sloshing suppression unit may be arranged such that a second opening is further provided on the surface of the liquid cargo to expose a portion of the edge region of the liquid cargo surface.

A plurality of second openings may be provided, and the plurality of second openings may be arranged to be symmetrical with respect to the first opening.

The sloshing inhibiting unit may be arranged such that a third opening is provided on the surface of the liquid cargo, exposing a corner region of the liquid cargo surface.

The sloshing suppression unit disposed in the corner region of the liquid cargo surface may have an inclined surface opposite the corner of the cargo hold.

In addition, according to another aspect of the present invention, there can be provided a liquid cargo storage structure comprising a cargo hold in which the liquid cargo is stored, and the above-described sloshing suppressing device disposed in the cargo hold.

The cargo hold may have a rectangular cross section.

Lower sides of the cargo hold may be provided with a lower chamfer (chamfer) having a surface inclined to the inside of the cargo hold.

At both edges of the upper portion of the cargo hold may be provided with an upper chamfer having a surface inclined toward the inside of the cargo hold.

Embodiments of the present invention can effectively suppress the sloshing of the liquid cargo stored in the cargo hold of the ship by a plurality of buoyancy blocks suspended on the liquid cargo, the plurality of buoyancy blocks are mutually by a simple and stable connection structure Can be connected.

1 is a cross-sectional view showing a sloshing suppression apparatus installed in a cargo hold according to an embodiment of the present invention.
Figure 2 is a plan view showing a state in which the sloshing suppression apparatus is installed in the cargo hold according to an embodiment of the present invention.
3 is a plan view showing a part of a sloshing suppression apparatus according to an embodiment of the present invention.
4 to 11 is a plan view showing a modification of the sloshing suppression apparatus according to an embodiment of the present invention.
12 is a perspective view showing a sloshing suppression unit of the sloshing suppression apparatus according to an embodiment of the present invention.
Figure 13 is a cutaway view showing the inside of the buoyancy block of the sloshing suppression apparatus according to an embodiment of the present invention.
14 is a view showing a load action state for the sloshing suppression apparatus according to an embodiment of the present invention.
15 is a longitudinal sectional view showing a modification of the buoyancy body of the sloshing suppressing apparatus according to the embodiment of the present invention.
16 and 17 are cross-sectional views showing a modification of the buoyancy body of the sloshing suppression apparatus according to an embodiment of the present invention.
18 is a perspective view showing a modification of the buoyancy body of the sloshing suppression apparatus according to an embodiment of the present invention.
19 is a front view showing a part of a sloshing suppressing unit of a sloshing suppressing apparatus according to an embodiment of the present invention;
20 is a plan view showing a fastening member of the sloshing suppression apparatus according to an embodiment of the present invention.
21 is a plan view showing a state in which a cover member is installed on a fastening member of the sloshing suppression apparatus according to an embodiment of the present invention.
22 is a plan view showing a modification of the fastening member of the sloshing suppression apparatus according to an embodiment of the present invention.
23 is a plan view showing a modification of the connecting belt and the fastening member of the sloshing suppressing apparatus according to an embodiment of the present invention.
24 and 25 are views showing a modification of the fastening member of the sloshing suppression apparatus according to an embodiment of the present invention.
FIG. 26 is a cross-sectional view of a liquid cargo storage structure having a sloshing inhibiting device according to an embodiment of the present invention. FIG.
27 and 28 are cross-sectional views each showing a modification of the liquid cargo storage structure having a sloshing suppressing device according to an embodiment of the present invention.

An embodiment of a sloshing suppression unit, a sloshing suppression apparatus including the same, and a liquid cargo storage structure according to the present invention will be described in detail with reference to the accompanying drawings. Elements are given the same reference numerals and redundant description thereof will be omitted.

1 is a cross-sectional view showing a sloshing suppression apparatus 10 according to an embodiment of the present invention installed in the cargo hold (1). 2 is a plan view showing a state in which the sloshing suppression device 10 according to an embodiment of the present invention is installed in the cargo hold (1). 3 is a plan view showing a part of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

According to the present embodiment, as shown in FIGS. 1 to 3, the sloshing suppression unit 100 disposed in plural on the liquid cargo 2 stored in the cargo hold 1, and these sloshing suppression units 100. The sloshing suppression apparatus 10 which has the fastening member 130 which connects mutually is provided.

According to this embodiment, the sloshing of the liquid cargo 2 can be effectively suppressed by the plurality of sloshing suppression units 100 suspended on the liquid cargo 2 stored in the cargo hold 1 of the ship. In addition, the plurality of sloshing suppression unit 100 may be connected simply and stably by the fastening member 130.

Hereinafter, each configuration of the sloshing suppression apparatus 10 according to the present embodiment will be described in more detail with reference to FIGS. 1 to 25.

The sloshing suppression unit 100 is a liquid cargo 2 such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), crude oil, and the like stored in the cargo hold 1 as shown in FIGS. 1 and 2. A plurality can be arranged on the liquid cargo 2 so as to cover the surface thereof.

These sloshing suppression unit 100 is arranged in a lattice structure, as shown in Figures 2 and 3, can be connected to each other by a fastening member 130, as described above, a plurality of sloshing suppression unit 100 By being connected to each other by the fastening member 130, the sloshing suppression apparatus 10 floating on the surface of the liquid cargo 2 can be realized.

In this way, the sloshing suppression unit 100 suspended in the liquid cargo 2 is connected by the fastening member 130 to cover the surface of the liquid cargo 2, whereby the ship is pitched and rolled during operation. When moving in various directions such as yaw and yaw, sloshing by the liquid cargo 2 in the cargo hold 1 can be effectively suppressed.

On the other hand, by modifying the arrangement structure of the sloshing suppression unit 100 as shown in FIGS. 4 to 9, the sloshing suppression unit 100 may cover only a part of the surface of the liquid cargo 2. 4 to 9 are plan views illustrating modified examples of the sloshing suppressing device according to an embodiment of the present invention.

That is, the sloshing suppression unit 100 has a first opening 102 which exposes a portion of the surface of the liquid cargo 2 on the surface of the liquid cargo 2 as shown in FIGS. 4 to 7. It may be arranged to be provided.

In this way, the sloshing suppression unit 100 is not disposed on the entire surface of the liquid cargo 2, but is disposed so as to cover only a part of the surface, thereby reducing the manufacturing cost of the sloshing suppression unit 100 while maintaining the sloshing suppression function. It can be reduced, which is advantageous in terms of cost reduction, and maintenance and repair costs can also be effectively reduced.

The first opening 102 can be located in the central region of the surface of the liquid cargo 2 as shown in FIGS. 4 to 7. The sloshing phenomenon may occur mainly in an area adjacent to the inner wall of the cargo hold 1. Thus, the sloshing suppressing unit 100 is used to cover the edge adjacent to the inner wall of the cargo hold 1 of the surface of the liquid cargo 2, and the central area of the surface of the liquid cargo 2 is the first opening 102. By exposing to the above, the cost of installing the sloshing suppression unit can be effectively reduced while maintaining the sloshing suppressing function as it is.

In this case, the ratio of the widths W2 and W4 of the first opening 102 to the widths W1 and W3 of the cargo hold 1 may be 0.6 to 0.7. For example, as shown in FIG. 4, the ratio of the longitudinal width W2 of the first opening 102 to the longitudinal width W1 of the cargo hold 1 may be set to 0.7, and the cargo hold 1 The ratio of the unidirectional width W4 of the first opening portion 102 to the unidirectional width W3 of N may be set to 0.6.

When the ratio of the widths W2 and W4 of the first opening 102 to the widths W1 and W3 of the cargo hold 1 is less than 0.6, the area of the first opening 102 becomes too small so that the buoyancy block ( The cost effect of reducing the number of 110 may be reduced.

On the other hand, when the ratio of the widths W2 and W4 of the first opening 102 to the widths W1 and W3 of the cargo hold 1 is greater than 0.7, the number of buoyancy blocks 110 is too reduced to suppress sloshing. The effect may be lowered.

The first opening 102 may have various shapes as shown in FIGS. 4 to 6. 4 to 6 show a structure in which first openings 102 each having a rectangular shape, a circular shape and an elliptic shape are provided in the central region of the surface of the liquid cargo 2.

Here, a circle shape, an ellipse shape means a geometrically perfect circle and an ellipse shape, as well as the overall shape of the circle, ellipse, if not completely, as shown in FIGS. 5 and 6 This means encompassing the case corresponding to a circle or an ellipse.

As shown in FIG. 7, the first opening may include a plurality of unit openings 104 disposed to be spaced apart from each other. That is, in the case of the first opening shown in FIG. 7, unlike the first opening 102 of the single region illustrated in FIGS. 4 to 6, the plurality of unit openings 104 may be formed. The unit 104 may be disposed to be spaced apart from each other by a predetermined interval by the sloshing suppression unit 100 interposed therebetween.

Further, as shown in FIGS. 8 and 9, on the surface of the liquid cargo 2, in addition to the above-described first opening 102, a second opening which exposes a part of the edge region of the surface of the liquid cargo 2. 106 may additionally be provided.

That is, the sloshing suppression unit 100 may be arranged such that the second opening 106 is further provided on the surface of the liquid cargo 2 to expose some of the edge regions of the surface of the liquid cargo 2. The second opening 106 may be formed for installation of equipment such as a pump tower in the cargo hold 1.

By arranging the sloshing suppression unit 100 such that a part of the edge region is exposed together with the central region of the surface of the liquid cargo 2 in this way, the manufacturing cost, maintenance and repair cost of the sloshing suppression unit 100 can be reduced more effectively. You can do it.

The second opening 106 is positioned such that a portion of the edge region of the surface of the liquid cargo 2, that is, the region adjacent to the side wall of the cargo hold of the surface of the liquid cargo 2, is exposed as shown in FIGS. 8 and 9. Can be.

There are a plurality of second openings 106 as shown in FIGS. 8 and 9, and these plurality of second openings 106 are provided with a first opening portion disposed on a central area of the surface of the liquid cargo 2. 102 may be arranged symmetrically.

If the second openings 106 are arranged symmetrically with respect to the first openings 102 disposed on the central area of the surface of the liquid cargo 2, the manufacturing and installation can be facilitated and the sloshing suppressing device ( The center of gravity of 100) can be kept uniform throughout.

8 illustrates a case in which two second openings 106 are symmetrical with respect to the first opening 102, and in FIG. 9, two of four second openings 106 are illustrated. The dog is symmetrical with respect to the first opening part 102, and the other two are symmetrical with the upper and lower sides.

On the other hand, as shown in FIGS. 10 and 11, the sloshing suppression unit 100 has a third opening 107 exposing a corner region of the surface of the liquid cargo 2 on the surface of the liquid cargo 2. It may be arranged to be provided.

That is, as illustrated in FIGS. 10 and 11, a third opening 107 corresponding to the corner position of the cargo hold 1 may be provided at the corner portion of the sloshing suppression apparatus 10. By forming the third opening portion 107 at the corner of the sloshing suppression device 10 as described above, even if a protective structure such as a separate protective cap is not installed, the stud bolt or the like protrudes at the corner portion of the cargo hold 1. The sloshing suppression unit 100 can be prevented from being damaged.

FIG. 10 illustrates a case in which the third opening 107 is formed by removing some sloshing suppressing units 100 located at the corners of the sloshing suppressing device 10, and FIG. 11 shows a plurality of sloshing. In the suppression unit 100, some sloshing suppression unit 100 disposed adjacent to an edge region of the surface of the liquid cargo 2, that is, to the corner of the cargo hold 1, has an inclined surface opposite the corner of the cargo hold 1. The case where the 3rd opening part 107 is formed by forming is shown.

Hereinafter, the specific structure of the sloshing suppression unit 100 is demonstrated with reference to FIG. 12 and FIG.

12 is a perspective view showing the sloshing suppression unit 100 of the sloshing suppression apparatus 10 according to an embodiment of the present invention. 13 is a cutaway view showing the inside of the buoyancy block 110 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

As shown in FIGS. 12 and 13, the sloshing suppression unit 100 may be formed of a buoyancy block 110 and a connecting belt 120 installed to cross the surface thereof.

The buoyancy block 110 has a buoyancy to float on the liquid cargo (2) stored in the cargo hold 1, more specifically, as shown in Figure 13, having a buoyancy for floating in the liquid cargo (2) The buoyancy body 112, the buoyancy body 112 may be formed of a foam member 114 and a cover 116 surrounding the foam member 114.

12 and 13, the buoyancy block 110 may have a cube or cuboid shape having a length of 1.0 to 1.5 m in width, length, and height, depending on the size of the internal space of the cargo hold 1. The size or shape may vary.

As shown in FIG. 13, the buoyancy body 112 may have a spherical shape, or may be formed of an ellipsoid or various other structures. The buoyancy body 112 may have a buoyancy force to be suspended in the liquid cargo (2), and when the liquid cargo (2) is LNG, the airtight space is filled in such a way that the gas that is not converted to liquid can be filled therein even at cryogenic temperatures. It can be made of a hollow structure.

The buoyancy body 112 may have a buoyancy by the structural characteristics as described above, and may also have buoyancy by the characteristics of the material.

The buoyancy body 112 may be made of a material having a strength that does not change the shape by the buoyancy, aluminum or aluminum so as to sufficiently perform its role even in the cryogenic state by the liquid cargo (2), such as LNG It may be made of an alloy.

In addition, the buoyancy body 112 may be made of a foam material having a closed cell structure. That is, the buoyancy body 112 does not have a hollow structure but the buoyancy body 112 itself may be made of a foam material having a closed cell structure. Here, the closed cell structure is a structure capable of having buoyancy by not absorbing liquid into the buoyancy body 112, and thus, as the buoyancy body 112 is made of a foam material of the closed cell, thermal load and compression load Even if a crack is generated on the surface of the buoyancy body 112, the liquid cargo 2 does not penetrate into the buoyancy body 112, so that the buoyancy body can maintain the buoyancy stably.

In this case, the buoyancy body 112 may be formed of a polymer material including any one of a phenol resin, a melamine resin and a synthetic resin thereof capable of maintaining elasticity even at cryogenic temperatures in which a liquid cargo 2 such as LNG maintains a liquid phase. have.

On the other hand, Figure 14 is a view showing a load (F1) action state for the sloshing suppression apparatus 100 according to an embodiment of the present invention.

As shown in FIG. 14, when the liquid cargo 2 is filled in the cargo hold 1 and is in a full load state, the sloshing suppression unit 100 is moved by the liquid cargo 2 by the flow of the liquid cargo 2. The compressive load F1 may be applied, and the concentrated load may be applied to the foam member 114 and the buoyancy body 112 by such a compressive load F1. In addition, the foam member 114 or the buoyancy body 112 may be damaged by the action of the concentrated load.

On the other hand, as shown in FIGS. 15 to 17, the structural stability of the sloshing suppression unit 100 may be improved by changing the shape or material of the buoyancy body 112. Here, FIG. 15 is a longitudinal cross-sectional view showing a modification of the buoyancy body 112 of the sloshing suppression apparatus 10 according to an embodiment of the present invention, Figures 16 and 17 is a cross-sectional view of this modification.

As shown in FIG. 15, the buoyancy body 112 may be formed so that the longitudinal section has an elliptical shape. In this way, by configuring the buoyancy body 112 to reduce the vertical height of the buoyancy body 112 so that the longitudinal section has an elliptical shape, the load (F2) acts on the sloshing suppression unit 100 as shown in FIG. In this case, the concentrated load is applied to the foam member 114 by the buoyancy body 112.

Such a cross section of the buoyancy body 112 may have a circular shape as shown in FIG. 16, or may have a rectangular shape as shown in FIG. 17. And, as shown in FIG. 17, 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 edge of the buoyancy body 112 has a curved shape, thereby preventing damage to the foam member 114, which may be generated by the edge of the buoyancy body 112.

As shown in FIG. 13, the foam member 114 surrounds the outer surface of the buoyancy body 112, and the overall shape may be formed of a rectangular parallelepiped.

In this case, the foam member 114 may have an open cell structure in order to prevent the liquid cargo 2 from penetrating more effectively. 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 thereof, so that the surface area of the foam member 114 can be maximized, so that the liquid cargo 2 is absorbed accordingly. Can promote.

As such, the foam member 114 is formed in an open cell structure so that the liquid cargo 2 penetrates into the foam member 114, so that the buoyancy block 110 floats in a state in which the liquid cargo 2 is partially submerged. The free surface of the cargo 2 is covered, whereby sloshing by the liquid cargo 2 in the cargo hold 1 can be more effectively suppressed.

The foam member 114 may be made of a synthetic resin, for example, a phenol resin capable of absorbing the liquid cargo 2 even at cryogenic temperatures in which the liquid cargo 2 such as LNG maintains a liquid state, It may be formed of a polymer material including any one of melamine resins and synthetic resins thereof.

The cover 116 surrounds the foam member 114, as shown in FIG. 13, thereby preventing the foam member 114 from breaking, and because of the debris of some damaged foam member 114, 2) can also prevent contamination.

Cover 116 may be made of a material that can have the same durability at room temperature, even at cryogenic temperatures, for example, may be made of polyacrylates (polyacrilate) fibers and the like.

18 is a perspective view showing a modification of the buoyancy body 112 of the sloshing suppression apparatus 10 according to an embodiment of the present invention. As shown in FIG. 18, the buoyancy body 112 may have a cylindrical shape. As described above, the cylindrical buoyancy body 112 is easy to manufacture and manage, and may be suitably used when a larger buoyancy is required.

Meanwhile, FIG. 18 illustrates the buoyancy body 112 inserted into the buoyancy block 110 for convenience of explanation and understanding.

19 is a front view showing a part of the sloshing suppression unit 100 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

12 and 19, the connection belt 120 may be installed on the surface of the buoyancy block 110 to cross the surface of the buoyancy block 110. More specifically, the connection belt 120 may be installed on one side and the other side of the buoyancy block 110 as shown in FIGS. 12 and 19, respectively, so as to pass through the center of one side and the other side of the buoyancy block 110. Can be installed.

The connecting belt 120 is not simply installed at the end of the buoyancy block 110 or at the local area of the buoyancy block 110, but as described above is installed across the surface of the buoyancy block 110 to provide a buoyancy block 110. ) And the connection area between the connecting belt 120 is maximized, so that the load acting on the interface between the connecting belt 120 and the buoyancy block 110 by the flow of the buoyancy block 110 is applied to the surface of the buoyancy block 110. It can be distributed evenly, and consequently, the structural stability of the sloshing suppressing device 10 can be significantly improved.

The connection belt 120 is made of the same material as the cover 116 of the buoyancy block 110, it can 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.

In this case, as shown in FIG. 12, the connecting belt 120 may be disposed in a pair such that the pair of connecting belts 120 cross each other, and the pair of crossed connecting belts 120 may be arranged in FIG. 12. As shown in, may be installed on one side and the other side of the buoyancy block 110, respectively.

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

In addition, as shown in FIG. 12, 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 below in presenting the fastening member 130.

On the other hand, both ends of the connecting belt 120, as shown in Figure 12 and 19, the ring 124 may be formed. As shown in FIG. 3, as the fastening member 130 is installed in the adjacent ring 124, the adjacent sloshing suppression units 100 may be connected to each other.

In this case, as shown in FIGS. 12 and 19, a portion of the connecting belt 120 is different in a state in which the connecting belt 120 is curved so that a portion of the connecting belt 120 faces another portion. It can be formed by joining with a part.

That is, as shown in Figure 19, by connecting the part and the other part with each other by sewing or the like in a state in which the connection belt 120 is superimposed so that a part of the connection belt 120 to face another part, The ring 124 may be formed at the end of the connecting belt 120 without using an additional member of.

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

As shown in FIGS. 3 and 20, the fastening member 130 may connect the pair of adjacent rings 124 to each other such that the adjacent sloshing suppression units 100 are connected to each other. As shown in FIG. 20, the fastening member 130 may include a pair of unit fastening members 132 disposed to be symmetrical with each other.

That is, as shown in FIG. 20, 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 adjacent pairs of rings 124, respectively. The pair of unit fastening members 132 may be disposed so that both ends thereof face each other and may be fastened to each other by means such as a bolt 134.

More specifically, as shown in FIG. 20, the pair of unit fastening members 132 may have a 'U' shape, and both ends of the pair of unit fastening members 132 may have a pair of adjacent rings ( 20 may be inserted from top to bottom and bottom to top with reference to FIG. 20. At this time, Figure 20 is a plan view of the buoyancy block 110 from the top, it turns out that the insertion of the fastening member 130 is not actually made from the top to the bottom, or from the bottom to the top.

Both ends of the pair of fastening members 130 respectively inserted into the adjacent pair of rings 124 may be located on spaced spaces between the pair of unit belts 122, as shown in FIG. The pair of fastening members 130 may be easily fastened by the bolts 134 or the like in such a space.

21 is a plan view showing a state in which the cover member 140 is installed on the fastening member 130 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

As illustrated in FIG. 21, the cover member 140 may cover the fastening member 130 to prevent contact between the fastening member 130 and the cargo hold 1. Since the fastening member 130 may be made of aluminum, SUS, or other composite materials to be used at cryogenic temperatures, by installing the cover member 140 on the fastening member 130, the flow of the sloshing suppressing device 10 is prevented. Accordingly, the fastening member 130 may prevent the problem of damaging the cargo hold 1 by hitting the inner wall of the cargo hold 1.

22 and 23, a rope or a seal may be used as the fastening member in addition to the pair of unit fastening members 132 described above.

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

As illustrated in FIG. 22, the fastening member 130 may be a rope that connects the adjacent pair of rings 124 to each other through the pair of adjacent rings 124. That is, the fastening member 130 may pass through a pair of adjacent rings 124 and then both ends thereof may be coupled by various coupling means to connect the adjacent pair of rings 124 with each other. The rope may be made of a material such as polyacrylate fiber, such as the connection belt 120.

As such, by using the rope having the same material as the connecting belt 120 as the fastening member 130, the fastening member 130 is connected to the cargo hold 1 according to the flow of the sloshing suppressing device 10 without a separate cover member. The problem of damaging the cargo hold 1 by hitting the inner wall can be prevented in advance.

23 is a plan view showing a modification of the connecting belt 120 and the fastening member 130 of the sloshing suppression apparatus 10 according to an embodiment of the present invention.

As shown in FIG. 23, the fastening member 130 may be a thread that connects the ends of a pair of adjacent connection belts 120 to each other by sewing using a portable sewing machine or the like.

In this case, separate ends are not formed at both ends of the connection belt 120, and instead, both ends of the connection belt 120 may extend to protrude to the outside of the buoyancy block 110. In this way, the ends of the connection belt 120 extending to the outside of the buoyancy block 110 may be connected to each other by the fastening member 130 according to the sewing method after being superimposed on each other.

24 and 25 are views showing a modification of the fastening member of the sloshing suppression apparatus according to an embodiment of the present invention.

As shown in FIGS. 24 and 25, the fastening member 130 may be an elastic wire that is wound to have a coil structure and the adjacent outer peripheral surfaces are in close contact with each other. That is, the fastening member 130 is formed by winding an elastic wire rod having elasticity such as SUS, aluminum, and invar in the form of a coil, and may have a structure such as a key ring.

Thus, by configuring the fastening member 130 as a key ring, one end of the fastening member 130, which is opened for insertion into the ring 124 of the connecting belt 120, is inserted into the ring 124, and then the outer peripheral surface adjacent thereto again It can be in close contact with the, thereby effectively preventing the release of the fastening by heat shrinkage, expansion, or the motion of the ship.

Hereinafter, the liquid cargo storage structure 1000 including the sloshing suppression apparatus 10 described above will be described with reference to FIGS. 26 to 28.

FIG. 26 is a cross-sectional view of a liquid cargo storage structure 1000 having a sloshing suppression apparatus 10 according to an embodiment of the present invention.

As shown in FIG. 26, the liquid cargo storage structure 1000 has a cargo hold 1 capable of storing liquid cargo 2 and a liquid placed within such cargo hold 1 as shown through the above-described embodiments. It may be composed of a sloshing inhibiting device 10 which may float on the cargo 2.

As illustrated in FIG. 26, the cargo hold 1 may have a rectangular shape as a whole in the longitudinal section viewed from its longitudinal direction. In addition, the upper chamfer portion 4 and the lower chamfer portion 3 may be formed at each corner of the cargo hold 1.

That is, the lower chamfer portion 3 having a surface inclined toward the inside of the cargo hold 1 may be provided at both side edges of the lower hold 1, and the inner side of the cargo hold 1 at both edges of the upper hold 1. The upper chamfer portion 4 having an inclined surface may be provided. Accordingly, the cargo hold 1 has inclined surfaces at four corners, and the inner wall of the cargo hold 1 has an octagonal shape.

As the upper chamfer portion 4 and the lower chamfer portion 3 are formed at each corner of the cargo hold 1 as described above, the free surface of the liquid cargo 2 can be reduced, so that the sloshing phenomenon can be more effectively suppressed. Will be.

As the sloshing phenomenon is reduced, the structural rigidity required for the heat insulation panel constituting the cargo hold 1 can be alleviated, so that it is possible to use an inexpensive heat insulating material having, for example, a low density of 30% or more compared with the conventional art. In this way, by using a low-density insulating material it is also possible to reduce the BOG (boil off gas).

27 is a cross-sectional view showing a modification of the liquid cargo storage structure 1000 with the sloshing suppression apparatus 10 according to an embodiment of the present invention.

As shown in FIG. 27, the cargo hold 1 has an upper chamfer portion 4 omitted, and has a lower chamfer portion 3 having an inclined surface inward of the cargo hold 1 at both edges of the lower portion of the cargo hold 1. Only may exist.

As the upper chamfer portion 4 is omitted in this way, the volume inside the cargo hold 1 is increased, so that a larger amount of the liquid cargo 2 can be loaded in the cargo hold 1. In this case, even if the upper chamfer part 4 is omitted, since the above-mentioned sloshing suppression apparatus 10 floats on the liquid cargo 2, sufficient effect of reducing sloshing can be acquired.

FIG. 28 is a cross-sectional view showing another modification of the liquid cargo storage structure 1000 having the sloshing suppressing apparatus 10 according to an embodiment of the present invention.

As shown in FIG. 27, the cargo hold 1 may have both the upper chamfer portion 4 and the lower chamfer portion 3 omitted, so that the inner wall thereof may simply have a rectangular cross section.

As the upper chamfer portion 4 and the lower chamfer portion 3 are omitted in this way, the volume inside the cargo hold 1 is further increased, so that a larger amount of liquid cargo 2 can be loaded inside the cargo hold 1. And, by simplifying the shape of the cargo hold 1, the connection work for the cargo hold 1 configuration is easier.

In addition, when the liquid cargo 2 is unloaded so that the sloshing suppressing device 10 is located at the bottom surface of the cargo hold 1, the edge portion of the sloshing suppressing device 10 is bent by the lower chamfer portion 3. It is possible to prevent the local load from acting on the fastening member (130 in Fig. 3).

As mentioned above, although an embodiment of the present invention has been described, those of ordinary skill in the art may add, change, delete or add components within the scope not departing from the spirit of the present invention described in the claims. The present invention may be modified and changed in various ways, etc., which will also be included within the scope of the invention.

1: cargo hold 2: liquid cargo
3: lower chamfer portion 4: upper chamfer portion
10: sloshing suppressing device 100: sloshing suppressing unit
102: first opening 104: unit opening
106: second opening 107: third opening
110: buoyancy block 112: buoyancy body
114: foam member 116: cover
120: connection belt 122: unit belt
124: ring 130: fastening member
132: unit fastening member 134: bolt
140: cover member 1000: liquid cargo storage structure

Claims (36)

A buoyancy block having buoyancy to float on the liquid cargo stored in the cargo hold; And
And a connecting belt installed on the buoyancy block to cross the surface of the buoyancy block.
The method of claim 1,
A sloshing suppression unit, characterized in that a ring is formed at both ends of the connecting belt.
The method of claim 2,
And said ring is formed by joining a portion of said connecting belt to said other portion in a state in which said connecting belt is bent such that a portion of said connecting belt faces another portion.
The method of claim 1,
And the connecting belts are arranged in pairs and cross each other.
The method of claim 1,
The connecting belt is a sloshing suppression unit, characterized in that installed on one side and the other side of the buoyancy block.
The method of claim 1,
The connecting belt is a sloshing suppression unit, characterized in that consisting of a pair of unit belt disposed side by side and spaced apart from each other.
The method of claim 1,
The buoyancy block,
A buoyancy body having buoyancy for floating in the liquid cargo; And
A sloshing suppression unit having an open cell structure and including a foam member surrounding the buoyancy body.
The method of claim 7, wherein
The buoyancy block,
The sloshing suppression unit further comprises a cover surrounding the foam member.
The method of claim 7, wherein
The buoyancy body is a sloshing suppression unit, characterized in that the longitudinal section has an elliptical shape.
The method of claim 7, wherein
The buoyancy body is a sloshing suppression unit, characterized in that the cross section has a circular or rectangular shape.
The method of claim 10,
When the cross section of the buoyancy body has a rectangular shape,
An edge portion of the buoyancy body has a curved shape, characterized in that the sloshing suppression unit.
The method of claim 7, wherein
The buoyancy body is a sloshing suppression unit, characterized in that made of a foam material having a closed cell structure.
The method of claim 7, wherein
The buoyancy body is a sloshing suppression unit, characterized in that it has a cylindrical shape.
13. The sloshing inhibiting unit of any one of claims 1, 4 to 12 disposed on the liquid cargo so as to cover the surface of the liquid cargo stored in the cargo hold; And
And a fastening member connecting the ends of the pair of adjacent connecting belts to each other so that the adjacent sloshing suppressing units are connected to each other.
The method of claim 14,
Both ends of the connecting belt is formed with a ring,
And said fastening member connects said pair of adjacent rings to each other. 16. The method of claim 15,
And the ring is formed by joining a part of the connecting belt to the other part in a state in which the connecting belt is bent such that a part of the connecting belt faces the other part.
16. The method of claim 15,
The fastening member may include a pair of unit fastening members each having a curved shape such that both ends thereof can be inserted into adjacent pairs of the rings,
The pair of unit fastening members are disposed so that both ends thereof are opposed to each other fastening each other.
The method of claim 17,
And a cover member covering the fastening member to prevent contact between the fastening member and the cargo hold.
16. The method of claim 15,
And the fastening member comprises a rope passing through the pair of adjacent rings to connect the pair of adjacent rings to each other.
20. The method of claim 19,
The fastening member is a sloshing suppression apparatus, characterized in that made of the same material as the connecting belt.
16. The method of claim 15,
The fastening member is a sloshing suppression apparatus comprising a resilient wire rod wound to have a coil (coil) structure and the adjacent outer peripheral surface is in close contact with each other.
The method of claim 14,
And the fastening member includes a thread for connecting the ends of the pair of adjacent connecting belts to each other by sewing.
The method of claim 14,
And the sloshing suppressing unit is arranged in a lattice structure.
The method of claim 14,
And the sloshing suppressing unit is arranged such that a first opening is provided on the surface of the liquid cargo to expose a portion of the surface of the liquid cargo.
25. The method of claim 24,
And the first opening is located in the central region of the liquid cargo surface.
The method of claim 25,
And a ratio of the width of the first opening to the width of the cargo hold is between 0.6 and 0.7.
The method of claim 25,
The first opening has a circular shape, an ellipse shape or a square shape.
25. The method of claim 24,
And the first opening part comprises a plurality of unit opening parts spaced apart from each other.
The method of claim 25,
And the sloshing suppressing unit is arranged to further provide a second opening for exposing a part of an edge region of the liquid cargo surface on the surface of the liquid cargo.
The method of claim 29,
And a plurality of the second openings, and the plurality of second openings are arranged to be symmetrical with respect to the first opening.
The method of claim 14,
And the sloshing suppressing unit is arranged such that a third opening is provided on the surface of the liquid cargo to expose a corner region of the liquid cargo surface.
32. The method of claim 31,
The sloshing suppression unit disposed in the corner region of the liquid cargo surface has an inclined surface opposite the corner of the cargo hold.
Cargo hold in which liquid cargo is stored; And
A liquid cargo storage structure comprising the sloshing inhibiting device of claim 14 disposed within the cargo hold.
The method of claim 33, wherein
The cargo hold is a liquid cargo storage structure, characterized in that the longitudinal cross-section.
The method of claim 34, wherein
Liquid cargo storage structure, characterized in that the lower side of the cargo hold is provided with a lower chamfer (chamfer) having a surface inclined to the inside of the cargo hold.
36. The method of claim 35,
Liquid cargo storage structure, characterized in that the upper chamfer portion having a surface inclined toward the inside of the cargo hold at both corners of the upper hold.

Images