KR102616517B1 - Liquefied gas storage tank and vessel comprising the same - Google Patents

Abstract

The present invention relates to a liquefied gas storage tank and a ship including the same. The liquefied gas storage tank is provided on a support and has a liquefied gas storage space, comprising: a barrier forming the storage space; and an insulating wall provided on the outside of the barrier and fixed to the support, wherein the barrier includes an outer barrier made of metal facing the inside of the insulating wall, and is fixed to the inside of the outer barrier and is fixed to the outside of the barrier. It has a smaller area than the barrier and has an integrated inner barrier made of metal exposing the perimeter of the outer barrier, and further includes a connection barrier that connects the inner barriers of a pair of adjacent barrier bodies to each other.

Description

Liquefied gas storage tank and vessel comprising the same}

The present invention relates to a liquefied gas storage tank and a ship including the same.

With recent technological developments, liquefied gases such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG) are widely used to replace gasoline or diesel.

In addition, within vessels such as LNG carriers, LNG RV (Regasification Vessel), LNG FPSO (Floating, Production, Storage and Offloading), and LNG FSRU (Floating Storage and Regasification Unit) that transport or store liquefied gas such as LNG at sea. A storage tank (so-called "cargo hold") is installed to store LNG in a cryogenic liquid state.

In addition, liquefied gas storage tanks can generate boil-off gas (BOG) due to heat intrusion from the outside, and the natural evaporation rate (BOR), which is the vaporization rate of boil-off gas, can be increased through insulation design. Lowering is a key technology in liquefied gas storage tank design. Additionally, since liquefied gas storage tanks are exposed to various loads such as sloshing, it may be essential to secure the mechanical strength of the insulation panel.

The present invention was created to solve the problems of the prior art as described above, and the purpose of the present invention is to finish the inside of the insulation wall using a barrier body in which the outer barrier and the inner barrier are fixed adjacent to each other, The aim is to provide a liquefied gas storage tank that is finished with a connecting barrier to ensure airtightness and sufficient mechanical strength, and a ship containing the same.

A liquefied gas storage tank according to one aspect of the present invention is a liquefied gas storage tank provided on a support and having a liquefied gas storage space, comprising: a barrier forming the storage space; and an insulating wall provided on the outside of the barrier and fixed to the support, wherein the barrier includes an outer barrier made of metal facing the inside of the insulating wall, and is fixed to the inside of the outer barrier and is fixed to the outside of the barrier. It has a smaller area than the barrier and has an integrated inner barrier made of metal exposing the perimeter of the outer barrier, and further includes a connection barrier that connects the inner barriers of a pair of adjacent barrier bodies to each other.

Specifically, in the barrier body, a filler made of non-metallic material may be laminated between the outer barrier and the inner barrier.

Specifically, the connection barrier includes: a first connection barrier in the form of a straight line connecting the inner barriers of a pair of adjacent barrier bodies to each other; and a second connection barrier in the shape of a cross connecting the four first connection barriers arranged adjacent to each other in a cross shape.

Specifically, the insulating wall may have a step on its periphery and may further include a connecting insulating wall seated on the step of a plurality of adjacent insulating walls.

Specifically, the insulating wall or the connecting insulating wall may have an anchor member on its inner surface for interconnecting the outer barriers of a pair of adjacent barrier bodies.

Specifically, the outer barrier has grid-shaped outer wrinkles protruding inward, and the inner barrier has a grid-shaped structure provided at a position corresponding to the outer wrinkles of the outer barrier and covering the outer wrinkles of the outer barrier. May have medial wrinkles.

Specifically, the outer wrinkles and the inner wrinkles may be disposed at a point where a step is formed on the inner surface of the insulating wall.

Specifically, a corner insulation wall fixed to the support at a corner bent by the support; And it further includes an angle member made of metal provided inside the corner insulation wall, wherein the angle member has a central portion higher than the height of the peripheral portion, and the barrier body is provided at the central portion of the angle member. The inner barrier may be sealed, and the outer barrier of the barrier body may be sealed around the peripheral portion of the angle member.

Specifically, the corner insulation wall is provided with a step around the circumference, and the connection insulation wall may be seated on the step between the corner insulation wall and the insulation wall that are adjacent to each other.

Specifically, the corner insulation wall may have different specifications of the insulation material on the inside and outside with respect to the outer surface of the step, or may have a shape in which the specifications of the insulation material change in the inward and outward direction outside the outer surface of the step.

A ship according to one aspect of the present invention has the liquefied gas storage tank.

The liquefied gas storage tank and the ship containing the same according to the present invention have a barrier body stacked on top of an insulating wall, where the barrier body has a form in which double barriers are stacked and fixed to each other, and a connection barrier is installed between adjacent barrier bodies. By having a structure, construction efficiency can be increased and performance such as sealability and durability can be guaranteed.

1 is a partial cross-sectional view of a liquefied gas storage tank according to an embodiment of the present invention.
Figure 2 is a plan view of a liquefied gas storage tank according to an embodiment of the present invention.
Figure 3 is a plan view of a liquefied gas storage tank according to an embodiment of the present invention.
Figure 4 is a perspective view of a barrier body of a liquefied gas storage tank according to an embodiment of the present invention.
Figure 5 is a perspective view of a barrier body and a connection barrier of a liquefied gas storage tank according to an embodiment of the present invention.
Figure 6 is a partial cross-sectional view of a liquefied gas storage tank according to an embodiment of the present invention.

The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In this specification, when adding reference numbers to components in each drawing, it should be noted that identical components are given the same number as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

For reference, in this specification, the liquefied gas may be LNG. Hereinafter, the explanation will be made on the assumption that the liquefied gas is LNG. However, in the present invention, the liquefied gas is, in addition to LNG, all substances (LPG, ethane, methanol, hydrogen, ammonia, etc.) that have a boiling point lower than room temperature and are forcibly liquefied for storage and have a calorific value. can encompass.

Additionally, the present invention includes a ship equipped with a liquefied gas storage tank described below. At this time, the ship may be a ship that uses liquefied gas as propulsion fuel/power generation fuel, and is a concept that includes gas carriers, merchant ships that transport cargo or people rather than gas, FSRU, FPSO, bunkering vessels, offshore plants, etc.

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

Figure 1 is a partial cross-sectional view of a liquefied gas storage tank according to an embodiment of the present invention, and Figures 2 and 3 are plan views of a liquefied gas storage tank according to an embodiment of the present invention.

In addition, Figure 4 is a perspective view of a barrier of a liquefied gas storage tank according to an embodiment of the present invention, Figure 5 is a perspective view of a barrier and a connection barrier of a liquefied gas storage tank according to an embodiment of the present invention, and Figure 6 is a partial cross-sectional view of a liquefied gas storage tank according to an embodiment of the present invention. For reference, Figure 3 shows the wrinkles of the barrier body 20 added to Figure 2.

Referring to Figures 1 to 6, the liquefied gas storage tank 1 according to an embodiment of the present invention is provided on a ship to store liquefied gas such as LNG, which is a cryogenic material (about -160°C to -170°C). It can include a flat structure and a corner structure.

For example, the transverse walls in the front and rear directions of the liquefied gas storage tank 1, the floor between the transverse walls, the vertical walls, and the ceiling may correspond to a planar structure. Additionally, for example, a structure where the horizontal wall, floor, vertical wall, and ceiling of the liquefied gas storage tank 1 meet may correspond to a corner structure.

Figure 1 and the like show the planar structure of the liquefied gas storage tank (1), and Figure 6 shows the corner structure of the liquefied gas storage tank (1). First, the planar structure of the liquefied gas storage tank 1 will be described as the basis, and the corner structure will be described later with reference to FIG. 6.

Also, for reference, please note that in this specification, the inside is in the direction toward the liquefied gas, and the outside is in the opposite direction.

The liquefied gas storage tank 1 forms a liquefied gas storage space and may have a form in which an insulating wall 10 and a barrier body 20 are stacked. At this time, the insulation wall 10 is fixed to the support body 2 and is provided on the outside of the barrier body 20.

The insulating wall 10 may be physically or chemically fixed to the support 2. For example, the insulating wall 10 may be fixed to the support 2 using known structures such as adhesive 3 or stud bolts (not shown). ) can be fixed. At this time, the support body 2 may refer to the inner wall of the hull of a ship, etc.

In addition, as a plurality of insulation walls 10 are installed adjacent to each other and the space between the insulation walls 10 is properly closed (can be filled with insulation material), the insulation structure of the liquefied gas storage tank 1 can be constructed.

The insulation wall 10 may be designed to block heat intrusion from the outside and withstand shock from the outside or shock from internal liquefied gas sloshing. At this time, the insulating material 11 may have a structure in which the insulating material 11 and the reinforcing material 12 are stacked, and the reinforcing material 12 may be disposed on the inside with respect to the insulating material 11.

The insulation material 11 may be polyurethane foam or the like, and is mainly responsible for the insulation performance of the insulation wall 10. However, since polyurethane foam is a material that is difficult to weld or bolt in reality, the present embodiment may additionally include a reinforcing material 12 to secure the barrier body 20 to the insulation wall 10.

The reinforcing material 12 may be plywood, etc., and may be provided inside the insulating material 11 to enable installation of the barrier body 20. At this time, an anchor member 14 made of metal may be provided on the reinforcing material 12, and welding connection of the barrier body 20 can be implemented through the anchor member 14.

Alternatively, a metal bolt (not shown) may be fixedly installed on the reinforcing material 12, and the outer barrier 21 of the barrier 20 is fixed through the bolt, thereby forming the insulation wall 10 and the barrier ( 20) can also be integrated.

The reinforcing material 12 may be provided only on the inside of the insulating material 11, as shown in FIG. 1, etc., and the outer surface of the insulating material 11 may be fixed to the support 2 through the adhesive 3. Alternatively, as shown in FIG. 6, reinforcing material 12 may be provided on both the inner and outer surfaces of the insulating material 11 to increase the durability of the insulating wall 10, and in this case, the insulating wall 10 may form a sandwich shape. there is.

When a plurality of insulating walls 10 are arranged adjacent to each other, the gap between the adjacent insulating walls 10 may be closed by the connecting insulating wall 10a. For this purpose, a step 13 may be provided around the insulating wall 10.

A pair of insulating walls 10 facing each other may be arranged so that the steps 13 face each other. At this time, a connecting insulating wall 10a is disposed between the pair of insulating walls 10, and both ends of the connecting insulating wall 10a are seated on the steps 13 of each insulating wall 10.

That is, the gap between a pair of adjacent insulation walls 10 may form a T shape due to the step 13 of the insulation walls 10, and the upper horizontal portion of the T-shaped gap is the connecting insulation wall 10a. This is filled, and the vertical portion at the bottom of the T-shaped gap can be filled with an insulating material (glass wool, etc.) as described above.

The insulation wall 10 and the connecting insulation wall 10a may be fixed by adhesive or the like, or may be indirectly connected through the barrier body 20. In addition, various methods that can secure stable mechanical strength can be applied to the fixing method of the insulation wall 10 and the connecting insulation wall 10a.

By installing the connection insulation wall (10a) between the two insulation walls (10) in this way, the gap that occurs between the adjacent insulation walls (10) is sealed with the connection insulation wall (10a) to prevent heat intrusion from the outside. You can block it.

The connection insulation wall 10a may have a structure in which the insulation material 11 and the reinforcement material 12 are sequentially stacked as described above with respect to the insulation wall 10, and in this case, the reinforcement material 12 of the connection insulation wall 10a An anchor member 14 or the like for fixing the barrier body 20 may be provided.

The barrier body 20 forms a storage space. The barrier body 20 may be provided to include an outer barrier 21 and an inner barrier 22 made of a metal material, and a filler 23 therebetween. In particular, the barrier body 20 is provided in a sandwich form in which the outer barrier 21, the filler 23, and the inner barrier 22 are integrated, and the barrier body 20 has an inner and outer direction excluding the protruding portion of the inner wrinkle 221. The height may be within 20% (or within 10%) of the height of the insulation wall 10, and may be relatively smaller than the height of the connecting insulation wall 10a.

The outer barrier 21 is a component facing the inside of the insulating wall 10, and is laminated on the reinforcing material 12 of the insulating wall 10. As mentioned above, anchor members 14 or bolts may be provided in the reinforcing material 12 of the insulation wall 10, and the outer barrier 21 of the barrier body 20 may be formed using methods such as welding or bolting. Thus, it can be fixed to the insulating wall (10).

The outer barrier 21 is made of materials such as SUS and INVAR to withstand the extremely low temperature of the liquefied gas, and various other metal materials can be used. However, the outer barrier 21 is made of a metal material and does not have an insulating function, but the insulating material can be achieved by the insulating material 11 described above.

The outer barrier 21 is made of a metal material capable of shrinking or expanding, and may be provided with outer wrinkles 211 to absorb shrinkage, etc. At this time, the outer wrinkles 211 may be provided in the form of a grid that protrudes inward, but the protrusion direction or arrangement can also be changed.

The inner barrier 22 is fixed to the inside of the outer barrier 21. At this time, the inner barrier 22 is arranged to be spaced apart from the outer barrier 21 by a certain height in the inner and outer directions, so that the outer barrier 21 and the inner barrier 22 form a double barrier structure.

The inner barrier 22 has a smaller area than the outer barrier 21 and is provided to expose the perimeter of the outer barrier 21. That is, the outer barrier 21 has a shape such as a square or rectangle, and the inner barrier 22 also has a shape similar to the outer barrier 21, but the size (area) of the inner barrier 22 is smaller than that of the outer barrier 21. As it is provided smaller, the perimeter of the outer barrier 21 is not covered by the inner barrier 22 when the inner barrier 22 is fixed on the outer barrier 21.

The peripheral portion of the outer barrier 21 that is not covered by the inner barrier 22 may be used for connection between the outer barriers 21 when a plurality of barrier bodies 20 are arranged adjacent to each other. This will be described later with reference to Figure 4, etc.

The inner barrier 22 may be made of the same or similar material as the outer barrier 21, such as SUS or INVAR, and the inner barrier 22 may also be provided with an inner wrinkle 221 like the outer barrier 21. . In particular, the inner wrinkles 221 may be provided in the form of a grid and provided at a position corresponding to the outer wrinkles 211 of the outer barrier 21. In this case, the inner wrinkles 221 are the outer wrinkles 211 of the outer barrier 21. ) can be covered.

However, depending on the size of the outer pleats 211, at least a portion of the outer pleats 211 may be accommodated in the inner pleats 221, or the outer pleats 211 may be located between the outer pleats 211 and the inner pleats 221. It can only be placed in the gap.

The outer wrinkles 211 of the outer barrier 21 and the inner wrinkles 221 of the inner barrier 22 may be disposed at a point where the step 13 is formed on the inner surface of the insulating wall 10. The point where the step 13 begins on the inner surface of the insulation wall 10 may be a gap between the insulation wall 10 and the connecting insulation wall 10a, and the barrier body 20 has the outer wrinkles 211 and the inner By locating the wrinkles 221 in the corresponding gap, even if the insulation wall 10 and the connecting insulation wall 10a cannot contract and expand on their own, the insulation wall 10, etc. can be formed by the contraction and expansion of the barrier body 20. It can prevent damage.

The filler 23 is stacked between the outer barrier 21 and the inner barrier 22, and implements a double barrier structure by maintaining the separation between the outer barrier 21 and the inner barrier 22. The filler 23 is a non-metallic material and may be plywood or the like.

The barrier body 20 is responsible for sealing the liquefied gas, and the insulation wall 10 is responsible for insulating the liquefied gas. At this time, the filler 23 built into the barrier body 20 may implement an insulating function, albeit slightly, depending on the material, but the filler 23 serves to secure the outer barrier 21 and the inner barrier 22 in a spaced apart state. It may be a configuration for the main purpose. That is, the filler 23 may be made of a non-metallic material that is practically impossible to insulate.

The filler 23 has a strength capable of maintaining the distance between the inner barrier 22 and the outer barrier 21, and a plurality of fillers 23 may be appropriately arranged between the outer barrier 21 and the inner barrier 22. That is, the filler 23 is disposed between the grid-shaped outer wrinkles 211 to support the flat portion of the inner barrier 22 on the flat portion of the outer barrier 21.

The barrier body 20 has a form in which the outer barrier 21, the filler 23, and the inner barrier 22 described above are integrated, and may have the same or different size from the insulating wall 10. For example, as shown in Figure 2, etc., the maximum area of the barrier body 20 (area of the outer barrier 21) may be equal to the area of the insulation wall 10.

However, as can be seen in FIG. 2, the barrier body 20 may be disposed with a center that is inconsistent with the insulating wall 10. That is, at least a portion of the barrier body 20 is arranged to be offset from the insulation wall 10, and through this, the connecting portion of the insulation wall 10 and the connecting portion of the barrier body 20 can be misaligned with each other.

As described above, the insulating walls 10 are arranged adjacent to each other so that the steps 13 face each other, and the connecting insulating walls 10a are stacked on the steps 13 to complete the insulating structure. The barrier body 20 is laminated on this insulating structure, and the finishing of the barrier body 20 will be described with reference to FIGS. 4 and 5.

First, referring to FIG. 4, a barrier body 20 is prepared in which an inner barrier 22 with a relatively small area is fixed on an outer barrier 21 with a relatively large area. At this time, the barrier body 20 may be seated on the reinforcing material 12 of the insulation wall 10 (or the connecting insulation wall 10a).

In particular, a pair of adjacent barrier bodies 20 can form an outer sealing structure by the outer barrier 21 as the outer barriers 21 are mutually sealed by welding or the like. At this time, a pair of adjacent outer barriers 21 may be welded while overlapping each other.

For this purpose, an anchor member 14 made of metal is provided on the inner surface of the insulation wall 10 or the connecting insulation wall 10a in a portion corresponding to the welded portion of the outer barrier 21, and a pair of adjacent outer barriers ( 21) can be welded.

Looking at a pair of barrier bodies 20 in which the outer barriers 21 are connected to each other, the inner barriers 22 are arranged adjacent to each other but are spaced apart. At this time, a pair of inner barriers 22 adjacent to each other are connected to each other by a connecting barrier 30.

The connection barrier 30 may be made of a metal material such as SUS, similar to the outer barrier 21 or the inner barrier 22, and may have wrinkles or no wrinkles.

The connection barrier 30 shown in FIG. 4 has a straight shape to interconnect a pair of adjacent inner barriers 22, and may be defined as the first connection barrier 31. The first connection barrier 31 may be connected to the inner barrier 22 by overlap welding or the like. At this time, the filler 23 may be added to the portion where the first connection barrier 31 is placed. The filler 23 is an anchor member (as shown) to enable welding between the inner barrier 22 and the first connection barrier 31. (not provided) may be partially provided.

Alternatively, the inner barrier 22 and the connection barrier 30 may be connected to each other using a mechanical fixing method such as bolting. Of course, the method of closing the connecting barrier 30 between the inner barriers 22 is not particularly limited, and any method that enables sealing can be used.

According to FIG. 4, for a pair of adjacent barrier bodies 20, the outer barrier 21 and the inner barrier 22 may be interconnected and sealed. However, the first connection barrier 31 may be shorter in length or width than the inner barrier 22, so the corners of the inner barrier 22 may not be covered by the first connection barrier 31.

Looking at the arrangement of the barriers 20 connected to each other in this way, the space between the four first connection barriers 31 arranged adjacent to each other in a cross shape, as shown in FIG. 5, may still be open.

At this time, the open portion may be closed with a second connection barrier 32 that has a different shape from the first connection barrier 31. That is, the four first connection barriers 31 may be connected to each other by the second connection barrier 32 having a cross shape.

The second connection barrier 32 may be sealedly connected to the first connection barrier 31 on the front, left, right, and left sides, respectively, and may be provided in a form that covers the corners of the inner barrier 22. At this time, the second connection barrier 32 is sealingly connected to the first connection barrier 31, and can also be sealingly connected to the corner portion of the inner barrier 22 between the pair of first connection barriers 31 facing each other at 90 degrees. .

Of course, the second connection barrier 32 can use any structure that can seal the first connection barrier 31 and the inner barrier 22 as described above, in addition to the cross shape shown in the drawing. That is, the second connection barrier 32 may have a shape such as a square.

When the corners between the first connection barriers 31 and the inner barrier 22 are finished with the second connection barrier 32, an inner sealing structure can be implemented in the barrier body 20. Previously, the outer sealing structure is implemented by fixing the outer barriers 21 by mutual welding, etc., and the inner sealing structure is called a connection barrier 30, as the inner barrier 22 has a smaller size than the outer barrier 21. It can be implemented through the addition of configuration.

Hereinafter, the corner structure of the liquefied gas storage tank 1 will be described with reference to FIG. 6.

Referring to FIG. 6, a corner insulation wall 10b and an angle member 40 may be provided at a corner of the support body 2 where the wall is bent at a certain angle.

The corner insulation wall 10b, like the insulation wall 10 described above, may be fixed to the support 2 with adhesive 3 or the like. However, the corner insulation wall 10b may be fixed to the support body 2 to increase the fixing strength. It may also be essentially provided on the outer surface of the insulation material 11.

The corner insulation wall 10b may be provided with a step 13 around the perimeter as in the insulation wall 10, and between the adjacent corner insulation walls 10b and the insulation wall 10, a corner insulation wall 10b ) of the step 13 and the connection insulation wall 10a, both ends of which are seated on the step 13 of the insulation wall 10, may be disposed. That is, the connection insulation wall 10a is seated on the adjacent corner insulation wall 10b and the step 13 of the insulation wall 10, thereby completing the insulation structure between the corner structure and the flat structure.

The corner insulation wall 10b may have a structure in which the reinforcement 12, the insulation 11, and the reinforcement 12 are stacked in the inner and outer directions. In particular, the corner insulation wall 10b is based on the outer surface of the step 13. Therefore, the specifications of the insulation material 11 may be different on the inside and outside. And/or the corner insulation wall 10b may have a shape in which the dimensions of the insulation material 11 are changed in the inward and outward direction outside the outer surface of the step 13.

The corner insulation wall 10b may have a form in which insulation materials 11 of different densities are stacked. That is, the corner insulation wall 10b may have a structure in which three types of insulation materials 11 are stacked in the inner and outer directions as shown in the drawing, and the insulation material 11 of the corner insulation wall 10b increases in density from the outside to the inside. It is designed to be raised upward, ensuring structural strength.

Alternatively, the corner insulation wall 10b may have a form in which insulation materials 11 having different specifications such as materials in addition to density are stacked in the inner and outer directions. Furthermore, it is possible that the corner insulation wall 10b is at least partially made of a single insulation material 11 whose density gradually increases from the outer surface to the inner surface.

The angle member 40 is provided inside the corner insulation wall 10b and may be made of a metal material. The angle member 40 may be made of a material such as SUS similar to the outer barrier 21 of the barrier 20, and has the function of finishing the barrier 20 on the corner with a planar structure disposed on both sides of the corner structure. You can have it.

For example, the height of the central portion of the angle member 40 may be higher than that of the peripheral portion, and the outer barrier 21 of the barrier body 20 may be sealed at the peripheral portion of the angle member 40. there is. That is, the outer barrier 21 disposed on the planar structure adjacent to the corner structure is interconnected with the peripheral portion of the angle member 40 disposed on the corner structure through a method such as welding/bolting, so that the outer barrier 21 and the peripheral portion of the angular member 40 are sealingly connected to each other. Through this, an external sealing structure at the corner can be implemented.

Additionally, the inner barrier 22 of the barrier body 20 may be sealed at the central portion of the angle member 40. Of course, instead of the inner barrier 22 being directly connected to the angle member 40, between the inner barrier 22 disposed on the planar structure adjacent to the corner structure and the central portion of the angle member 40 disposed on the corner structure. As the connection barrier 30 is finished, the inner barrier 22 and the central portion of the angle member 40 can be sealed and connected to each other. Through this, an inner sealing structure at the corner is realized.

However, in this case, the gap between the adjacent angle members 40 and the inner barrier 22 may be different from the gap between the pair of inner barriers 22 previously described in FIG. 4, so the central portion of the angle member 40 The connection barrier 30 for connecting the inner barrier 22 may be different in size, shape, etc. from the first connection barrier 31 mentioned above. Additionally, a plurality of connection barriers 30 may be applied between the angle member 40 and the inner barrier 22, and wrinkles may be applied to the connection barriers 30.

Alternatively, the barrier body 20 placed adjacent to the corner structure among the planar structures may have a form in which the outer barrier 21 is larger expanded toward the corner structure. In this case, the outer barrier 21 is formed without the use of the connecting barrier 30. 21) may be directly and sealingly connected to the central portion of the angular member 40.

In this way, the angle member 40 may be provided to close the outer barrier 21 and the inner barrier 22 included in the barrier body 20 of the planar structure, respectively, on the corner structure. In addition, the angle member 40 may be provided as a double barrier structure like the barrier body 20 in order to independently form the outer sealing structure and the inner sealing structure.

As such, in this embodiment, the barrier body 20, in which the outer barrier 21 and the inner barrier 22 are integrated, is stacked on the insulating wall 10 to form a sealed and insulated structure of the liquefied gas storage tank 1. As a result, outer sealing and inner sealing can be easily implemented between adjacent barrier bodies 20, thereby achieving effects such as improved manufacturing efficiency and improved mechanical strength.

Although the present invention has been described in detail through specific examples, this is for the purpose of specifically explaining the present invention, and the present invention is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present invention. It would be clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

1: Liquefied gas storage tank 2: Support body
3: Adhesive 10: Insulating wall
10a: connection insulation wall 10b: corner insulation wall
11: insulation material 12: reinforcement material
13: Step 14: Anchor member
20: barrier 21: outer barrier
211: outer fold 22: inner barrier
221: inner wrinkle 23: filling material
30: connection barrier 31: first connection barrier
32: second connection barrier 40: angle member

Claims (11)

A liquefied gas storage tank provided on a support and having a liquefied gas storage space,
A barrier body forming the storage space; and
It includes an insulating wall provided on the outside of the barrier body and fixed to the support body,
The barrier body is,
An outer barrier made of metal facing the inside of the insulation wall and an inner barrier made of metal that is fixed to the inside of the outer barrier and has a smaller area than the outer barrier and exposes the perimeter of the outer barrier are integrated. ,
A liquefied gas storage tank further comprising a connecting barrier interconnecting the inner barriers of a pair of adjacent barrier bodies. The method of claim 1, wherein the barrier body is:
A liquefied gas storage tank in which a filler made of non-metallic material is stacked between the outer barrier and the inner barrier. The method of claim 1, wherein the connection barrier is:
a first straight connecting barrier connecting the inner barriers of a pair of adjacent barrier bodies to each other; and
A liquefied gas storage tank comprising a cross-shaped second connection barrier interconnecting the four first connection barriers arranged adjacent to each other in a cross shape. The method of claim 1, wherein the insulating wall is:
A step is provided around the perimeter,
A liquefied gas storage tank further comprising a connecting insulating wall mounted on the step of the plurality of insulating walls adjacent to each other. The method of claim 4, wherein the insulation wall or the connecting insulation wall,
A liquefied gas storage tank having an anchor member for interconnecting the outer barriers of a pair of adjacent barriers on the inner surface. According to claim 4,
The outer barrier has lattice-shaped outer wrinkles protruding inward,
The inner barrier is provided at a position corresponding to the outer wrinkles of the outer barrier and has inner wrinkles in the form of a grid that cover the outer wrinkles of the outer barrier. The method of claim 6, wherein the outer wrinkles and the inner wrinkles are:
A liquefied gas storage tank disposed at a point where a step is formed on the inner surface of the insulating wall. According to claim 1,
a corner insulation wall fixed to the support at a corner bent by the support; and
It further includes an angular member made of metal provided on the inside of the corner insulation wall,
The angular member is,
The height of the central portion is provided to be higher than the height of the peripheral portion, the inner barrier of the barrier body is sealed at the central portion of the angle member, and the outer barrier of the barrier body is sealed at the peripheral portion of the angle member. Storage tank. According to claim 8,
The corner insulation wall is provided with a step around the perimeter,
The insulation wall is provided with a step around the perimeter,
A liquefied gas storage tank further comprising a connection insulating wall seated on the step of the corner insulating walls adjacent to each other and the step of the insulating wall. The method of claim 9, wherein the corner insulation wall is:
A liquefied gas storage tank in which the specifications of the insulation material are different on the inside and outside based on the outer surface of the step, or the specifications of the insulation material are changed in the inner and outer direction outside the outer surface of the step. A ship having the liquefied gas storage tank according to any one of claims 1 to 10.

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