KR101672221B1 - Cargo for liquefied natural gas and reinforcing member used in the same - Google Patents

Abstract

Disclosed is a liquefied gas holding window for reinforcing a barrier wrinkle and a barrier reinforcement member used therefor. The liquefied gas holding window according to an embodiment of the present invention is installed in a ship to store liquefied gas. The liquefied gas holding window includes a heat insulating panel structure that is installed in the hull and insulates the liquefied gas from the outside, A barrier wall enclosing the structure and having a flat surface portion and a curved barrier wrinkle portion toward the storage space and a barrier reinforcing member provided outside the barrier wrinkle portion to prevent the barrier wrinkle portion from being deformed by the impact of the liquefied gas, The barrier reinforcing member includes a buffer space spaced apart from the barrier ribs and between the outer surface of the barrier ribs and the inner surface of the barrier ribs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquefied gas-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquefied gas holding window and a barrier reinforcing member used therein, and more particularly, to a liquefied gas holding window for reinforcing a barrier wrinkle and a barrier reinforcing member used therein.

The liquefied gas is a gas which is cooled or compressed to be made into a liquid. For convenience of transportation, the gas which is gas at room temperature is used as a liquid. One of the important uses in liquefied gas is liquefied natural gas. Liquefied natural gas refers to a colorless transparent cryogenic liquid that reduces methane-based natural gas to -162 ° C and reduces its volume by one-sixth.

As such liquefied natural gas is used as an energy source, an efficient transportation method that can transport the gas from the production base to the purchase site of the customer site has been examined in order to use this gas as energy. As a result of this effort, a large amount of liquefied gas A liquefied gas transport vessel capable of transporting liquefied natural gas to the sea was developed.

However, the liquefied gas transportation vessel is required to have a cargo that can store and store the liquefied gas liquefied at an extremely low temperature.

That is, since the liquefied natural gas has a higher vapor pressure than the atmospheric pressure and has a boiling temperature of about -162 ° C, in order to safely store and store such liquefied natural gas, For example, it should be made of aluminum steel, stainless steel, 35% nickel steel, etc. It should be designed with a unique insulation panel structure which is resistant to thermal stress and heat shrinkage and prevents heat penetration. Such a liquefied gas holding window can be divided into a self-supporting type and a membrane type according to its structure.

If the liquefied gas leaks to the inside of the heat insulating panel, it may cause damage to the cargo window due to rapid volume expansion due to temperature increase. Thus, a membrane barrier is provided to seal the liquefied gas inside the cargo hold.

In the liquefied gas holding window, a plurality of barrier sheets are combined to form a membrane barrier, and these walls are subject to thermal shrinkage due to cryogenic liquefied natural gas and may be damaged due to thermal stress when the thermal shrinkage occurs.

Because of this problem, the barriers have a corrugation to have a low in-plane stiffness. The bending of the barrier reduces the thermal stress at the welded part by deforming a certain amount when heat shrinkage occurs.

Korean Patent Laid-Open Publication No. 10-2012-0013233 (Feb. 14, 2012) discloses a liquefied natural gas storage tank and a manufacturing method thereof.

Korean Published Patent Application No. 10-2012-0013233 (2012.02.14.)

An embodiment of the present invention is to provide a liquefied gas holding window capable of preventing the bending of the barrier rib from being deformed by the impact of the storage fluid, and a barrier rib for use therein.

Also, it is intended to provide a liquefied gas retention window that is easy to assemble and repair and a barrier reinforcement member used therefor.

Another object of the present invention is to provide a liquefied gas retention chamber and a barrier reinforcement member to be used in the liquefied gas retention chamber.

It is another object of the present invention to provide a liquefied gas holding window capable of ensuring surface rigidity and a barrier reinforcing member used therefor.

According to an aspect of the present invention, there is provided a liquefied gas holding window for storing liquefied gas, comprising: a heat insulating panel structure installed in a hull and insulating a liquefied gas from the outside; A barrier surrounding the storage space in which the storage fluid is received and sealing the insulation panel structure, the barrier comprising a planar portion and a curved barrier wrinkle toward the storage space; And a barrier reinforcing member provided outside the barrier rib to prevent the barrier rib from being deformed by the impact of the storage fluid, wherein the barrier rib is spaced apart from the barrier rib, A liquefied gas holding window including a buffer space may be provided between the inner surface of the barrier rib reinforcing member and the inner surface of the barrier reinforcing member.

And both side portions of the barrier reinforcing member may be provided with liquefied gas holders respectively fixed to both side flat portions of the barrier ribs.

The barrier rib reinforcing member may be provided with a liquefied gas holding window in which a longitudinal end of the barrier rib is opened to allow liquefied gas to be filled in the buffer space.

The barrier strengthening member may be provided with a liquefied gas holding window in a curved sheet shape.

The barrier reinforcement member may be provided with a liquefied gas holding window formed by a press method.

Wherein the barrier ribs include first barrier ribs and second barrier ribs in different directions and intersections where the first and second barrier ribs intersect with each other, Cargo holds may be provided.

Wherein the barrier ribs include first barrier ribs and second barrier ribs in different directions and intersections where the first and second barrier ribs intersect with each other, A liquefied gas holding window may be provided in at least one of the first and second barrier ribs and both longitudinal side ends of the barrier ribs are opened so that liquefied gas can be filled in the buffer space.

And a shock absorbing member provided between the barrier reinforcing member and the barrier rib to relieve a load transmitted from the barrier rib to the barrier rib.

The shock absorbing member may be provided with a liquefied gas holding window whose one surface is fixed to the inner surface of the barrier strengthening member and the other surface supports the outer surface of the barrier rib.

The barrier reinforcement member may be provided with a liquefied gas holding window welded to the flat surface portion.

The barrier reinforcement member may be provided with a liquefied gas holding window further including a ridge.

According to another aspect of the present invention, there is provided a barrier strengthening member for use in a liquefied gas holding case installed in a barrier having a curved barrier wrinkle toward a storage space in which a storage fluid is accommodated, A barrier reinforcement member provided on the outside of the barrier wrinkle portion so as to prevent deformation of the barrier wrinkle portion and having both side portions fixed to both side flat portions of the barrier wrinkle portion and spaced apart from the barrier wrinkle portion, .

There can be provided a barrier reinforcing member which is provided at an intersection where the barrier ribs of different directions cross each other and is fixed to a plane portion around the intersection.

And a shock absorbing member provided between the barrier reinforcing member and the barrier and capable of being elastically deformed.

A barrier rib member including a ridge may be provided on an outer surface surrounding the outside of the barrier rib.

The liquefied gas holding window according to the embodiment of the present invention and the barrier reinforcing member used therein can be easily assembled and repaired using a barrier reinforcing member provided on the outer surface of the barrier wrinkle portion, and the inner space of the barrier wrinkle portion can be freely utilized.

Further, it is possible to secure the accommodation capacity by accommodating the liquefied gas in the buffer space while reducing the impact transmission amount by forming a buffer space between the barrier ribs and the barrier rib reinforcement member.

Further, the storage capacity of the storage fluid can be secured by using the sheet-shaped barrier rib reinforcement member.

In addition, the production process can be simplified by forming the sheet by the press method.

In addition, ridges or valleys can be formed to improve surface rigidity.

1 is a cross-sectional view showing the structure of a liquefied gas holding window.
Fig. 2 is a perspective view showing the corrugated part of the barrier wall. Fig.
3 is a perspective view showing a state in which a barrier reinforcing member according to an embodiment of the present invention is installed.
4 is a cross-sectional view taken along the line AA of Fig.
FIG. 5 is a perspective view showing a state in which a barrier reinforcing member according to another embodiment of the present invention is installed at an intersection. FIG.
FIG. 6 is an exploded perspective view of FIG. 5. FIG.
FIG. 7 is a reference view schematically showing a degree of deformation of a barrier wrinkle portion according to a sloshing load when a barrier rib reinforcing member according to an embodiment of the present invention is installed.
8 is a cross-sectional view showing a state in which a barrier reinforcing member according to another embodiment of the present invention is installed.
9 is a cross-sectional view showing a barrier reinforcement member including an impact-absorbing member.
10 is a cross-sectional view showing a state in which the shock absorbing member according to another embodiment of FIG. 9 is installed.
11 is a view showing a barrier reinforcement member including a ridge.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 is a cross-sectional view showing the structure of a liquefied gas holding window 1. Fig.

Liquefied gas storage is a facility for storing cryogenic fluid such as LNG (Liquefied Natural Gas) or LPG (Liquefied Petroleum Gas). It is used for transporting liquefied gas such as RV (Regasification Vessel), FPSO (Floating, Production, Storage and Offloading), FSRU (Floating Storage and Regasification Unit), SRV (Shuttle and Regasification Vessel) and the like, and a gas storage structure installed on the land.

The liquefied gas holding window 1 includes a kitchen wall 40 and a two-layered heat insulating panel structure (U, L) enclosing the liquefied gas receiving space so as to ensure airtightness stability. An upper heat insulating panel structure U) and the lower insulating panel structure L, the auxiliary barrier 31 is formed. Further, the heat insulating panel can generally be made of a lightweight material such as a polyurethane foam which is excellent in heat insulation performance.

The lower insulating panel structure L may include a lower heat insulating panel 20 and a lower reinforcing panel 21. [ The bottom insulation panel 20 is installed on the inner surface of the outer wall 10 of the liquefied gas transportation vessel and is fixed by an epoxy mastic 11 through a lower reinforcement panel 21 And is mechanically fixed by a stud bolt 12 at the same time. The outer wall 10 can support the load of the storage fluid, and an inner hull can be used.

More specifically, the mastic 11 is adhered to the outer wall 10 after being applied to the lower surface of the lower reinforcing panel 21 with an elastic adhesive material. The mastic 11 can adjust the level difference of the lower heat insulating panel 20 and absorb the load applied to the lower heat insulating panel 20. A stud bolt 12 is welded to the inner surface of the outer wall 10 and the lower thermal insulating panel 20 forms a through hole 22 so that the stud bolt 12 can be inserted. When the stud bolt 12 is inserted into the through hole 22, the lower reinforcing panel 21 and the stud bolt 12 are firmly fixed by using the nut 13. Thereafter, a cylindrical plug 23 is inserted into the through hole 22 to finish the lower heat insulating panel 20.

The adjacent lower heat insulating panels 20 are coupled with each other with a gap therebetween and a flat joint made of glass wool is attached to the interval between the lower heat insulating panels 20 after the lower heat insulating panel 20 is fixed. ; 24) are filled.

An auxiliary barrier 31 such as rigid triplex or SUS (stainless steel) is attached and fixed on the lower insulating panel 20. The adjacent auxiliary barrier 31 is connected by the auxiliary connection barrier 32 so that the sealing of the auxiliary barrier 31 is completed. The auxiliary connection barrier 32 may be a supple triplex 32 attached to a rigid triplex 31 using epoxy glue.

The upper insulating panel structure U may include an upper insulating panel 30, a connecting panel 33, and an upper reinforcing panel 34. A top insulation panel 30 is laminated and fixed on the lower insulation panel 20 and a connection panel 33 (or a top bridge panel) is installed between the adjacent upper insulation panels 30 . The connection panel 33 can be attached and fixed on the support triplex 32 using an epoxy glue.

After the installation of the upper insulating panel 30 and the connecting panel 33 is completed, a kitchen wall 40 using a metal material is mounted on the upper insulating panel 30 and the connecting panel 33 with an anchor strip (not shown) And thus the cargo window is completed.

The above has described the cargo window by taking one embodiment of the liquefied gas holding window as an example. In addition, a liquefied gas holding window may be used, either using a weldable secondary barrier or including other types of membrane barriers. That is, the embodiment of the present invention is not limited to the structure of the liquefied gas holding window 1 described above, and any kind of liquefied gas holding window using the membrane may be used regardless of its kind.

Fig. 2 is a perspective view showing the corrugation 42 of the barrier 40. Fig. The following barriers 40 include the main wall 40 and the auxiliary barrier 31 of Fig. However, for convenience, the kitchen wall 40 will be described as an example.

The barrier 40 is for hermetically protecting the adiabatic panel structures (U, L) from the liquefied gas, and a plurality of sheets are joined by welding or the like to block the adiabatic panel structures (U, L) from the liquefied gas. The barriers 40 can be made of various materials, but generally stainless steel (SUS) materials can be used.

The barrier 40 is of a metallic material in direct contact with the cryogenic liquefied gas and is subjected to a large thermal stress. Accordingly, the barrier 40 may include two-directional folds 42 (42a, 42b) that intersect each other to relieve thermal stress. For example, the barrier wall 40 includes a planar portion 41, a first barrier rib portion 41, which is bent in the direction from the planar portion 41 toward the accommodation space and arranged in different directions to facilitate contraction or extension by thermal deformation, (42a), a second barrier rib (42b), and an intersection (43) where the two barrier ribs intersect. The corrugations 42 below include the intersection 43. This is because the intersection portion 43 also refers to a portion where the two corrugations 42a and 42b meet with each other.

In the drawings of the present invention, two-directional barrier ribs 42a and 42b arranged vertically to each other are shown, but may include three or more barrier ribs as necessary. For example, the three-directional barrier ribs may be disposed at an angle of 60 degrees with respect to each other.

The thermal stress acting in the in-plane direction of the barrier 40 can be solved by the two-direction wrinkles 42a and 42b. Since the corrugated portion 42 is subject to deformation in the width direction, the corrugated portion 42 can cope with thermal stress. The thermal stress acting in the longitudinal direction (first direction) of the first barrier ribs 42a is relieved by the stretchability of the second barrier ribs 42b and the thermal stress in the longitudinal direction of the second barrier ribs 42b 2 direction) can be solved by the stretchability of the first barrier rib portion 42a.

Hereinafter, a barrier reinforcing member 100 according to an embodiment of the present invention will be described with reference to FIGS. 3 to 7. FIG. FIG. 3 is a perspective view showing a state in which a barrier reinforcing member 100 according to an embodiment of the present invention is installed, and FIG. 4 is a cross-sectional view taken along the line A-A in FIG.

The barrier rib reinforcing member 100 according to an embodiment of the present invention may be provided outside the barrier ribs 42a and 42b to prevent the barrier ribs 42 from being deformed by the impact of the storage fluid . Since the barrier ribs 42 are formed to be bent toward the accommodation space, a void space 44 is formed in the barrier ribs 42. Therefore, deformation of the barrier ribs 42 may occur due to the sloshing impact.

Sloshing is a phenomenon in which a liquid substance contained in a cargo hold flows when a ship or floating structure moves in various sea states. If there is liquid in only a part of the interior of the cargo hold, the wall and the ceiling of the cargo hold will be severely impacted by the sloshing caused by the flow of the liquid, which is called sloshing impact. The sloshing impact not only damages the barrier 40 and the corrugated portion 42 but also may be transmitted to the heat insulating panel to damage the heat insulating panel.

The sloshing phenomenon is necessarily caused by the dynamic movement of the ship during the operation of the ship, and the cargo hold is to be designed to have sufficient strength to withstand the load by sloshing. Further, it is necessary to insert a reinforcing member (not shown) in the space 44 in the bellows-shaped corrugated portion 42 in order to prevent deformation of the bellows portion 42 protruding toward the accommodation space. However, the method of inserting the reinforcing member is disadvantageous in that it takes a lot of time and cost to install and maintain and increase the weight of the cargo hold.

In order to solve such a problem, the barrier intensifying member 100 according to the embodiment of the present invention is installed outside the barrier wrinkle part 42, so that the installation and maintenance can be simplified and the cost can be reduced. Further, it can be fixed to both side portions of the barrier ribs 42 and thermally deformed together with the barrier ribs 42, thereby relieving the thermal stress of the barrier ribs 40. Further, when a thin sheet such as the barrier 40 is used, the weight increase of the cargo hold can be minimized as compared with the case of inserting the reinforcing member.

The barrier rib reinforcing member 100 may be spaced apart from the barrier ribs 42 to provide a buffer space 110 between the outer surface of the barrier ribs 42 and the inner surface of the barrier rib member 100. In addition, the barrier rib reinforcement member 100 may be opened in the longitudinal direction of the barrier ribs 42 so that the storage fluid can be received in the buffer space 110.

The barrier wall reinforcing member 100 includes an attachment portion 104 attached to the barrier wall 40 and a reinforcing portion 105 surrounding the outer periphery of the barrier rib 42. The attachment portion 104 may be attached to the flat surface portion 41 located on both sides of the barrier rib portion 42. The barrier reinforcement member 100 may be made of the same material as the barrier 40, and may be made of SUS, for example. Further, the barrier rib reinforcing member 100 can be formed by a press method using a sheet similarly to the barrier wall 40. [ The method of attaching the barrier reinforcement member 100 and the barrier 40 includes welding.

The reinforcing portion 105 may have a shape corresponding to the shape of the barrier rib portion 42. [ That is, it may have the same curved shape as the curved surface of the barrier ribs 42, but may have a larger size. 4 shows that the barrier ribs 100 are spaced apart from the front surface of the barrier ribs 42 by the same distance. However, the distance may vary as needed. In addition, a portion of the reinforcing portion 105 is in close contact with the bellows portion 42.

FIG. 5 is a perspective view showing a state in which a barrier reinforcing member 100-1 according to another embodiment of the present invention is installed at the intersection 43, and FIG. 6 is an exploded perspective view of FIG.

The barrier rib reinforcement member 100 provided at the intersection portion 43 includes a first barrier rib member wrinkle portion 101 surrounding the outer surface of the first barrier rib member 42a and a second barrier rib member wrinkle portion 42 surrounding the outer surface of the second barrier rib member 42b And a barrier stiffening member intersection 103 that covers the outer surface of the intersection 43. The barrier rib reinforcement member intersection 103 includes a first barrier rib member 102 and a second barrier rib member 102,

The attachment portion 104 of the barrier rib reinforcement member 100 provided at the intersection portion 43 may be attached to the planar portion 41 around the intersection portion 43. In other words, it can be attached to the flat surface portion 41 between the first barrier ribs 42a and the second barrier ribs 42b.

FIG. 7 is a reference view schematically showing a degree of deformation of the barrier ribs 42 according to a sloshing load when the barrier rib reinforcement member 100 according to an embodiment of the present invention is installed. Referring to FIG. 7, it will be explained that the impact applied to the barrier ribs 42 is mitigated by the provision of the barrier rib reinforcement member 100. FIG. Although the barrier rib reinforcement member 100 provided in the barrier ribs 42 is shown as an example in the drawings, the same can be applied to the barrier rib reinforcement member 100-1 provided at the intersection 43 shown in Fig. 5 .

The barrier reinforcing member 100 receives the sloshing load F1 and deforms its shape. At this time, pressure is transferred to the storage fluid accommodated in the buffer space 110 between the barrier ribs 100 and the barrier ribs 42 due to the shape deformation of the barrier ribs 100. However, in the process of elastically changing the shape of the barrier rib member 100, a part of the initial load F1 is absorbed, and a part of the pressurized storage fluid moves along the barrier ribs 42, The sloshing load F2 transmitted to the wall corrugated portion 42 is smaller than the sloshing load F1 transmitted to the wall reinforcing member 100 (F1> F2).

7 shows a case where a barrier rib reinforcement member 100 having the same thickness as that of the barrier ribs 42 is provided. Generally, as the thickness of the barrier ribs 42 or the barrier ribs 100 increases, the resistance against load increases, but the resistance against thermal stress decreases. The shape of the barrier rib member 100 is deformed by the sloshing load F1 and the shape of the barrier rib portion 42 is also changed by the load F2 transmitted by the pressurized storage fluid to the barrier rib portion 42 . At this time, the degree of deformation of the barrier ribs 42 and the degree of deformation of the barrier ribs 42 are significantly reduced.

Although the load is transmitted in an upward direction at an angle of 45 degrees, the barrier reinforcement member 100 can mitigate the impact transmitted to the barrier ribs 42 regardless of the direction in which the sloshing load is transmitted.

8 is a cross-sectional view showing a state where a barrier reinforcing member 100-2 according to another embodiment of the present invention is installed. The barrier rib reinforcement member 100 shown in FIG. 6 shows that the front surface of the barrier ribs 42 and the barrier rib member 100 are separated from each other. The barrier rib reinforcement member 100-2 shown in FIG. 8 is formed on the outer surface of the barrier rib portion 42 at the portion where the flat portion 41 and the barrier rib portion 42 are connected to each other. And the wall reinforcing member 100-2 is spaced apart from the floor of the wrinkled wall portion 42. [

The curved shape of the reinforcing portion 105 of the barrier rib reinforcing member 100-2 according to another embodiment may be different from the curved shape of the barrier rib portion 42. [ The barrier rib reinforcing member 100-2 can be stably fixed by being supported at the portion where the flat surface portion 41 and the flange rim portion 42 are connected to each other and also can be fixed to the outer surface of the barrier ribs 42, 2, the impact buffering effect described above can be expected.

9 is a cross-sectional view showing a barrier reinforcement member 100-3 including the shock-absorbing member 106, and Fig. 10 is a cross-sectional view showing a state in which the shock-absorbing member 107 according to another embodiment of Fig. 9 is installed.

The impact absorbing members 106 and 107 are provided between the barrier reinforcing members 100-3 and 100-4 and the barrier wrinkle 42 so that the barrier ribs 42 extend from the barrier reinforcing members 100-3 and 100-4, It is possible to alleviate the load transmitted to the load. The shock is firstly alleviated by the cushioning space 110 provided between the barrier reinforcing members 100-3 and 100-4 and the wall corrugation 42. However, when the shock absorbing members 106 and 107 are used The impact reduction effect can be further increased. The impact absorbing members 106 and 107 can be attached to the inner surfaces of the barrier reinforcing members 100-3 and 100-4 to support the barrier ribs 42. [

While one side of one side of the impact absorbing member 106 supports the outer surface of the support 40 of the barrier 40 before the impact is transmitted, the other side of the impact absorbing member is normally spaced apart from the barrier rib 42, The one side of the impact absorbing member supports the wall corrugated portion 42 by deforming the shape of the wall reinforcing member.

The impact absorbing members 106 and 107 are elastically deformable, and an elastic body can be used. For example, a sponge type using a fiber structure or a spring type can be used.

9 shows a case in which the shock absorbing member 106 supports a part of the face of the wall corrugated portion 42 and the example shown in Fig. As shown in Fig. In the case of the example shown in Fig. 10, since the shock absorbing member 107 is provided in most of the cushioning space 110, the cushioning effect can be larger than the buffering effect by the storage fluid. However, as compared with the case where the storage fluid is accommodated in the volume of the buffering space 110, the storage capacity for accommodating the storage fluid in the cargo space 1 may be somewhat reduced. Therefore, it can be confirmed that the distance from the barrier ribs 42 in the case of the barrier rib reinforcement member 100-4 shown in Fig. 10 is reduced. It is possible to secure the storage capacity of the entire cargo hold 1 by reducing the thickness of the shock absorbing member 107 as much as the shock absorbing member 107 can support many surfaces of the wall corrugated portion 42 and maximize the buffering effect .

11 is a view showing a barrier reinforcement member 100-5 including a ridge 108. Fig.

The barrier reinforcement member 100-5 according to another embodiment of the present invention may include a ridge 108 (Ridge). The ridge 108 means a protrusion formed on the outer surface of the barrier rib reinforcement member 100-5 and extends from one side of the barrier rib reinforcement member 100-5 to the other side beyond the ridge. The ridge 108 is provided so as to protrude in the longitudinal direction of the barrier rib reinforcement member 100-5. The meaning of protruding in the longitudinal direction means that a wave can be formed when viewed from the side with respect to the longitudinal direction of the barrier rib reinforcement member 100-5. 11 shows the ridge 108 formed continuously with the curved surface of the barrier rib reinforcement member 100-5, but includes a ridge 108 formed intermittently. That is, it is also possible that the ridge 108 is formed only on the side surface of the barrier rib reinforcement member 100-5.

Further, two or more ridges 108 may be provided continuously in the longitudinal direction of the barrier reinforcement member 100-5 and only one ridge 108 may be provided. In the case where the ridge 108 is continuously provided, a single ridge may be formed between the two ridges 108.

The ridge 108 can increase the in-plane rigidity of the barrier rib reinforcement member 100-5. In-plane stiffness refers to the stiffness in the in-plane direction that occurs with respect to a given unit deformation in the in-plane direction in the planar structure. Therefore, the barrier strengthening member 100-5 having increased in-plane rigidity can increase the deflection force against sloshing and can better protect the barrier ribs 42 from deformation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

10: outer wall, 11: mastic,
12: stud bolt, 13: nut,
20: lower insulation panel, 21: lower reinforcement panel,
22: through hole, 23: foam plug,
24: flat joint, 30: upper insulating panel,
31: secondary barrier, 32: secondary connection barrier,
33: connecting panel, 34: upper reinforcing panel,
40: barrier, 41: flat portion,
42a: first barrier rib portion, 42b: second barrier rib portion,
43: intersection, 100: barrier reinforcing member,
101: first barrier rib member wrinkles, 102: second barrier rib member wrinkles,
103: barrier rib reinforcement member intersection, 104: attachment portion,
105: reinforced portion, 106,107: shock absorbing member,
108: ridge, 110: buffer space.

Claims (12)

CLAIMS 1. A liquefied gas cargo hold installed on a ship for storing liquefied gas,
A heat insulating panel structure installed in the hull and insulating the liquefied gas from the outside;
A barrier disposed to surround the storage space in which the liquefied gas is accommodated to seal the heat insulating panel structure and including a planar portion and a curved barrier rib toward the storage space; And
And a barrier reinforcing member provided on the outside of the barrier wrinkle portion to cover the barrier wrinkle portion to prevent the barrier wrinkle portion from being deformed by the impact of the liquefied gas,
Wherein the barrier reinforcing member is spaced apart from the barrier rib and is provided with a buffer space between the barrier rib and the barrier rib,
Wherein the barrier rib reinforcing member is fixed to the flat surface portion on both sides of the rim of the barrier rib along both the longitudinal direction of the rim of the barrier rib and the one end of the barrier rib is arranged in the longitudinal direction of the barrier rib, Wherein the liquefied gas is filled in the buffer space. delete delete The method according to claim 1,
Wherein the barrier ribs comprise first barrier ribs and second barrier ribs in different directions and intersections where the first and second barrier ribs intersect,
And the barrier reinforcement member is installed at the intersection. The method according to claim 1,
Wherein the barrier ribs comprise first barrier ribs and second barrier ribs in different directions and intersections where the first and second barrier ribs intersect,
Wherein the barrier ribs are provided at one or more of the first barrier ribs or the second barrier ribs and both ends in the longitudinal direction of the barrier ribs are opened so that liquefied gas, Liquefied gas holdings to be filled. The method according to claim 1,
And a shock absorbing member provided between the barrier reinforcing member and the barrier rib to relieve a load transmitted from the barrier rib to the barrier rib. The method according to claim 6,
Wherein the impact absorbing member has one surface fixed to the inner surface of the barrier strengthening member and the other surface supporting the outer surface of the barrier rib. The method according to claim 1,
Wherein the barrier reinforcement member further comprises a ridge. delete delete delete delete

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