KR20230037425A - 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. The liquefied gas storage tank comprises: a barrier body forming the storage space; and a heat insulating wall provided outside the barrier wall and fixed to the support, wherein the barrier body has an outer barrier made of metal facing the inside of the heat insulating wall, and an inner barrier made of metal fixed to the inside of the outer barrier and having a smaller area than the outer barrier to expose the circumference of the outer barrier in an integrated form, and further includes a connection barrier interconnecting the inner barriers of the pair of barriers adjacent to each other. Therefore, the present invention can provide the liquefied gas storage tank and the ship including the same, capable of finishing the inner side of the heat insulating wall using a barrier body in which the outer barrier and the inner barrier are fixed adjacently, and securing airtightness and also ensuring sufficient mechanical strength by finishing a gap between the barrier bodies with the connection barrier.

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.

According to recent technology development, liquefied natural gas (LNG) and liquefied petroleum gas (LPG) have been widely used to replace gasoline or diesel.

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

In addition, the liquefied gas storage tank can generate boil off gas (BOG) by heat intrusion from the outside, and the natural vaporization rate (Boil Off Rate; BOR) Lowering is a key technology for liquefied gas storage tank design. In addition, since the liquefied gas storage tank is 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 an object of the present invention is to finish the inside of the heat insulation wall using a barrier body in which the outer barrier wall and the inner barrier are adjacently fixed, but between the barrier walls To provide a liquefied gas storage tank capable of securing confidentiality by closing with a connection barrier and ensuring sufficient mechanical strength, and a ship including the same.

A liquefied gas storage tank according to an aspect of the present invention is provided on a support and has a liquefied gas storage space, comprising: a barrier wall forming the storage space; and a heat insulating wall provided outside the barrier wall body and fixed to the support body, wherein the barrier wall body is fixed to an outer barrier made of a metal material facing an inner side of the heat insulating wall and fixed to an inner side of the outer barrier wall, Further comprising a connection barrier having an area smaller than that of the barrier and having an integral shape of the inner barrier made of metal exposing the circumference of the outer barrier and interconnecting the inner barrier of a pair of adjacent barrier bodies.

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

Specifically, the connection barrier may include: a first connection barrier having a straight line shape interconnecting the inner barriers of the pair of adjacent barrier bodies; and a cross-shaped second connection barrier interconnecting the four first connection barriers arranged adjacent to each other in a cross shape.

Specifically, the heat insulating wall may further include a connection heat insulating wall having a circumferential step difference and seated on the step difference of a plurality of the heat insulating walls adjacent to each other.

Specifically, the insulating wall or the connection insulating wall may have an anchor member for interconnecting the outer barrier walls of the pair of barrier walls adjacent to each other on inner surfaces.

Specifically, the outer barrier has an outer corrugation in the form of a lattice protruding inward, and the inner barrier has a lattice form provided at a position corresponding to the outer corrugation of the outer barrier and covering the outer corrugation of the outer barrier. May have inner creases.

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

Specifically, a corner insulating wall fixed to the support at a corner bent from the support; And further comprising an angle member made of metal provided inside the corner insulating wall, wherein the angle member has a central portion higher than the height of the peripheral portion, and the angle member has a central portion of the barrier wall body. An inner barrier may be sealed, and an outer barrier of the barrier body may be sealed at a peripheral portion of the angle member.

Specifically, a step is provided around the corner insulating wall, and the connection insulating wall may be seated on the step between the corner insulating wall and the insulating wall adjacent to each other.

Specifically, the corner insulating wall may have a shape in which the dimensions of the insulation material are different on the inside and outside based on the outer surface of the step, or the shape of the insulation material may be changed in an 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.

A liquefied gas storage tank according to the present invention and a ship including the same are laminated with a barrier on top of an insulating wall, the barrier has a form in which double barriers are stacked and fixed to each other, and a connection barrier is installed between adjacent barriers By having a structure, it is possible to increase construction efficiency and ensure performance such as sealing and durability.

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

Objects, 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 adding reference numerals to components of each drawing in this specification, it should be noted that the same components have the same numbers as much as possible, even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

For reference, in the present specification, liquefied gas may be LNG. In the following description, it will be assumed that the liquefied gas is LNG, but in the present invention, the liquefied gas is forced to be liquefied for storage because its boiling point is lower than room temperature, in addition to LNG, and all substances having calorific value (LPG, ethane, methanol, hydrogen, ammonia, etc.) can cover

In addition, the present invention includes a ship equipped with a liquefied gas storage tank described below. At this time, the ship may be a ship using liquefied gas as a propulsion fuel/power generation fuel, and is a concept that includes all gas carriers, merchant ships carrying non-gas cargo or people, FSRUs, FPSOs, bunkering vessels, offshore plants, and the like.

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

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

4 is a perspective view of a barrier wall of a liquefied gas storage tank according to an embodiment of the present invention, and FIG. 5 is a perspective view of a barrier wall and a connection barrier of a liquefied gas storage tank according to an embodiment of the present invention. is a partial cross-sectional view of a liquefied gas storage tank according to an embodiment of the present invention. For reference, FIG. 3 is a view in which wrinkles of the barrier 20 are added to FIG.

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 (about -160 ° C to -170 ° C) material. It may include a planar structure and a corner structure.

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

1 and the like show a planar structure of the liquefied gas storage tank 1, and FIG. 6 shows a corner structure of the liquefied gas storage tank 1. First, the planar structure of the liquefied gas storage tank 1 will be basically described, and the corner structure will be described later with reference to FIG. 6.

Also, for reference, in this specification, the inner side is a direction toward the liquefied gas, and the outer side is 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 wall 20 are stacked. At this time, the heat insulating wall 10 is fixed to the support body 2 and is provided on the outside of the barrier wall 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 by a known configuration such as an adhesive 3 or a stud bolt (not shown). ) can be fixed. In this case, the support 2 may mean an inner wall of a hull such as a ship.

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

The insulating wall 10 may be designed to withstand an impact from the outside or an impact due to sloshing of liquefied gas from the inside while blocking heat penetration from the outside. In this case, the heat insulating material 11 may have a structure in which the heat insulating material 11 and the reinforcing material 12 are stacked, and the reinforcing material 12 may be disposed inside the heat insulating material 11 .

The heat insulating material 11 may be polyurethane foam or the like, and is mainly responsible for the heat insulating performance of the heat insulating wall 10 . However, since polyurethane foam is a member that is practically difficult to weld or bolt, in this embodiment, a reinforcing material 12 may be additionally provided to fix the barrier wall 20 to the heat insulating wall 10.

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

Alternatively, bolts (not shown) made of metal may be fixedly installed on the reinforcing member 12, and the outer barrier 21 of the barrier body 20 is fixed through the bolts, so that the insulation wall 10 and the barrier body ( 20) can be integrated.

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

When a plurality of insulating walls 10 are disposed adjacent to each other, gaps between the adjacent insulating walls 10 may be closed by the connection insulating walls 10a. To this end, a step 13 may be provided around the insulating wall 10 .

The pair of insulating walls 10 facing each other may be disposed in a form in which the steps 13 face each other. At this time, a connection insulation wall 10a is disposed between the pair of insulation walls 10, and both ends of the connection insulation wall 10a are seated on the step 13 of each insulation wall 10.

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

The insulating wall 10 and the connecting insulating wall 10a may be fixed by adhesive or the like, or may be indirectly connected through the barrier wall 20 . In addition, various methods for securing stable mechanical strength may be applied to the fixing method of the insulating wall 10 and the connection insulating wall 10a.

In this way, by installing the connection insulation wall 10a between the two insulation walls 10, the gap formed between the adjacent insulation walls 10 is sealed with the connection insulation wall 10a to prevent heat intrusion from the outside. can block

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

The barrier wall 20 forms a storage space. The barrier body 20 may be provided to include an outer barrier 21 made of a metal material, an inner barrier 22, and a filling material 23 therebetween. In particular, the barrier body 20 is provided in a sandwich form in which the outer barrier wall 21, the filling material 23, and the inner barrier wall 22 are integrated, and the barrier body 20 is provided in an internal and external direction except for the protruding portion of the inner wrinkles 221. The height may be within 20% (or within 10%) of the height of the insulating wall 10 and may be relatively smaller than the height of the connection insulating wall 10a.

The outer barrier 21 is a configuration facing the inside of the heat insulating wall 10, and is laminated on the reinforcing material 12 of the heat insulating wall 10. As mentioned above, the reinforcement 12 of the insulating wall 10 may be provided with anchor members 14 or bolts, and the outer barrier 21 of the barrier body 20 uses a method such as welding or bolting. It can be fixed to the heat insulation wall (10).

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

The outer barrier 21 is made of a metal material capable of contraction or expansion, and may be provided with outer wrinkles 211 to absorb contraction or the like. At this time, the outer corrugations 211 may be provided in the form of a lattice protruding inward, but it is also possible to change the protruding direction or arrangement.

The inner barrier 22 is fixed to the inner side of the outer barrier 21 . At this time, the inner barrier 22 is arranged so as to be spaced apart from the outer barrier 21 by a predetermined height in the inward and outward 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 circumference 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 the outer barrier 21 While being smaller, when the inner barrier 22 is fixed on the outer barrier 21, the circumference of the outer barrier 21 is not covered by the inner barrier 22.

A 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 barriers 20 are disposed adjacent to each other. This will be described later with reference to FIG. 4 and the like.

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 inner wrinkles 221 like the outer barrier 21. . In particular, the inner corrugation 221 may be provided in a lattice form and provided at a position corresponding to the outer corrugation 211 of the outer barrier 21. At this time, the inner corrugation 221 is the outer corrugation 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. can only be placed in the gap of

The outer corrugation 211 of the outer barrier 21 and the inner corrugation 221 of the inner barrier 22 may be disposed on a point where the step 13 is formed on the inner surface of the insulating wall 10 . The starting point of the step 13 on the inner surface of the insulating wall 10 may be a gap between the insulating wall 10 and the connection insulating wall 10a, and the barrier wall 20 has outer wrinkles 211 and inner By placing the wrinkles 221 in the corresponding gap, even if the heat insulating wall 10 and the connection insulating wall 10a cannot contract and expand by themselves, the heat insulating wall 10 and the like damage can be prevented.

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

The barrier wall 20 is responsible for sealing the liquefied gas and the heat insulating wall 10 is responsible for insulating the liquefied gas. At this time, the filling material 23 built into the barrier body 20 may implement a thermal insulation function, albeit weakly, depending on the material, but the filling material 23 fixes 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 filling material 23 may be a material that is practically impossible to insulate among non-metallic materials.

The filling material 23 has strength capable of maintaining the distance of the inner barrier 22 with respect to the outer barrier 21, and may be appropriately arranged in plurality between the outer barrier 21 and the inner barrier 22. That is, the filling material 23 is disposed between the grid-shaped outer corrugations 211 and is provided 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 shape in which the outer barrier 21, the filling material 23, and the inner barrier 22 described above are integrally formed, and may have the same size as or a different size from the heat insulating wall 10. For example, as shown in FIG. 2 , the maximum area of the barrier wall 20 (the area of the outer barrier 21) may be the same as the area of the heat insulating wall 10.

However, as can be seen in FIG. 2, the barrier wall 20 may be disposed in a mismatched center with the heat insulating wall 10. That is, at least a portion of the barrier wall 20 is displaced from the heat insulation wall 10, and through this, the connection portion of the insulation wall 10 and the connection portion of the barrier wall 20 can be inconsistent with each other.

As described above, the insulating walls 10 are disposed adjacent to each other so that the steps 13 face each other, and the insulating walls 10a connected to the steps 13 are stacked to finish the insulation structure. The barrier wall 20 is laminated on this heat insulation structure, and the finishing of the barrier wall 20 will be described with reference to FIGS. 4 and 5 .

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

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

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

Looking at a pair of barriers 20 in which the outer barriers 21 are connected to each other, the inner barriers 22 are disposed adjacent to each other, but there is a gap between them. At this time, a pair of inner barriers 22 adjacent to each other are interconnected by a connection barrier 30.

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

The connection barrier 30 shown in FIG. 4 has a straight line shape to interconnect a pair of inner barriers 22 adjacent to each other, and may be defined as a 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, a filling material 23 may be added to the portion where the first connection barrier 31 is placed, and the filling material 23 is an anchor member (shown) to enable welding between the inner barrier 22 and the first connection barrier 31. not) may be partially provided.

Alternatively, the inner barrier 22 and the connection barrier 30 may be interconnected by a mechanical fixing method such as bolting. Of course, a method of closing the connection barrier 30 between the inner barriers 22 is not particularly limited, and any method capable of sealing may be utilized.

According to FIG. 4, for a pair of barrier bodies 20 adjacent to each other, an outer barrier 21 and an inner barrier 22 may be interconnected and sealed. However, since the first connection barrier 31 may have a smaller length or width than the inner barrier 22 , a corner 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, as shown in FIG. 5 , between the four first connection barriers 31 arranged adjacent to each other in a cross shape may still be open.

At this time, a second connection barrier 32 having a different shape from the first connection barrier 31 may be closed on the open portion. That is, the four first connection barriers 31 may be interconnected by the second connection barrier 32 having a cross shape.

The second connection barrier 32 may be provided in a form that covers the corner of the inner barrier 22 while being sealedly connected to the first connection barrier 31 in the front, rear, left and right directions, respectively. At this time, while the second connection barrier 32 is sealedly connected to the first connection barrier 31, it may also be sealed connected to a 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 may use any structure capable of sealing the first connection barrier 31 and the inner barrier 22 as described above, other than 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 of the first connection barrier 31 and the inner barrier 22 are closed with the second connection barrier 32, an inner sealing structure may be implemented in the barrier body 20. Previously, the outer sealing structure is implemented by fixing the outer barriers 21 to each other by welding, etc., and the inner sealing structure has a smaller size than the inner barrier 22 of the outer barrier 21, so that the connection barrier 30 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 insulating wall 10b and an angle member 40 may be provided at a corner of the support 2 where the wall is bent at a predetermined angle.

The corner insulating wall 10b may be fixed to the support 2 with an adhesive 3 or the like, similarly to the insulating wall 10 described above, but the corner insulating wall 10b is reinforced with a reinforcing material 12 to increase the fixing strength. may be necessarily provided on the outer surface of the heat insulating material 11.

The corner insulating wall 10b may be provided with a step 13 around it as in the insulating wall 10, and between the corner insulating walls 10b and the insulating walls 10 adjacent to each other, the corner insulating wall 10b A connection insulating wall 10a having both ends seated on the step 13 of the heat insulating wall 10 and the step 13 of the heat insulating wall 10 may be disposed. That is, while the connection insulating wall 10a is seated on the step 13 of the corner insulating wall 10b and the insulating wall 10 adjacent to each other, it is possible to close the insulating structure between the corner structure and the flat structure.

The corner insulating wall 10b may have a structure in which the reinforcing material 12, the insulating material 11, and the reinforcing material 12 are stacked in an inward and outward direction. In particular, the corner insulating wall 10b is based on the outer surface of the step 13. As a result, the dimensions of the heat insulating material 11 may be different from the inside and outside. And/or the corner insulating wall 10b may have a shape in which the dimensions of the insulating material 11 are changed in an inward and outward direction outside the outer surface of the step 13 .

In other words, the corner insulating wall 10b may have a form in which insulating materials 11 having different densities are stacked. That is, the corner insulating wall 10b may have a structure in which three kinds of insulating materials 11 are stacked in an internal and external direction, as shown in the drawing, and the insulating material 11 of the corner insulating wall 10b has a density going from the outside to the inside. It is provided so as to be raised upward, so that structural strength can be secured.

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

The angle member 40 is provided inside the corner insulating 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, etc., and functions to close the barrier 20 on the corner on a flat structure disposed on both sides of the corner structure. can have

For example, in the angle member 40, the height of the central portion may be provided higher than the height 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 angle member 40 are sealed to each other. Through this, it is possible to implement an outer sealing structure at the corner.

In addition, the inner barrier 22 of the barrier body 20 may be sealed to the central portion of the angle member 40 . Of course, instead of directly connecting the inner barrier 22 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 In this case, as the connection barrier 30 is closed, the inner barrier 22 and the central portion of the angle member 40 may be sealed and connected to each other. Through this, the inner sealing structure at the corner is implemented.

However, in this case, since the gap between the angle member 40 and the inner barrier 22 adjacent to each other may be different from the gap between the pair of inner barriers 22 described above in FIG. 4, the central portion of the angle member 40 The connection barrier 30 for connecting the inner barrier and the inner barrier 22 may have a different size, shape, and the like from the aforementioned first connection barrier 31 . In addition, a plurality of connection barriers 30 may be applied between the angle member 40 and the inner barrier 22, or wrinkles may be applied to the connection barrier 30.

Alternatively, the barrier wall 20 placed adjacent to the corner structure of the planar structure may have a shape in which the outer barrier 21 extends larger toward the corner structure, in this case, the outer barrier without using the connection barrier 30 ( 21) may be directly sealedly connected to the central portion of the angle 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 20 of the planar structure, respectively, on the corner structure. In addition, the angle member 40 may be provided with a double barrier structure similar to the barrier body 20 in order to independently form an outer sealing structure and an inner sealing structure.

As described above, in this embodiment, the outer barrier 21 and the inner barrier 22 are integrated and laminated on the heat insulating wall 10 to form a sealed and heat-insulated structure of the liquefied gas storage tank 1 As such, it is possible to easily implement outer sealing and inner sealing between adjacent barriers 20 to obtain 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 explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It will be clear that the modification or improvement is possible.

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

1: liquefied gas storage tank 2: support
3: adhesive 10: insulation wall
10a: connection insulation wall 10b: corner insulation wall
11: insulator 12: reinforcing material
13: step 14: anchor member
20: barrier body 21: outer barrier
211: outer folds 22: inner barrier
221: inner pleats 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
A heat insulating wall provided outside the barrier wall and fixed to the support,
The barrier is
An outer barrier made of metal facing the inside of the insulating wall and an inner barrier made of metal fixed to the inside of the outer barrier and having a smaller area than the outer barrier to expose the circumference of the outer barrier have an integrated form. ,
The liquefied gas storage tank further comprises a connection barrier interconnecting the inner barriers of the pair of barriers adjacent to each other. The method of claim 1, wherein the barrier body,
A liquefied gas storage tank in which a non-metallic filling material is laminated between the outer barrier and the inner barrier. The method of claim 1, wherein the connection barrier,
first connection barriers having a straight line shape interconnecting the inner barriers of a pair of adjacent barrier bodies; 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,
A step is provided around the perimeter,
The liquefied gas storage tank further comprises a connection insulating wall seated on the step of the plurality of insulating walls adjacent to each other. The method of claim 4, wherein the insulating wall or the connection insulating wall,
A liquefied gas storage tank having an anchor member for interconnecting the outer barriers of the pair of barriers adjacent to each other on the inner surface. According to claim 4,
The outer barrier has outer corrugations in the form of a lattice protruding inward,
The inner barrier is provided at a position corresponding to the outer corrugation of the outer barrier and has inner corrugations in a grid form covering the outer corrugations of the outer barrier. The method of claim 6, wherein the outer wrinkles and the inner wrinkles,
A liquefied gas storage tank disposed on a point where a step is formed on the inner surface of the insulating wall. According to claim 1,
a corner insulating wall fixed to the support at a corner bent from the support; and
Further comprising a metal angle member provided on the inside of the corner insulating wall,
The angle member,
The height of the central portion is provided higher than the height of the peripheral portion, the inner barrier of the barrier body is sealed to the central portion of the angle member, and the outer barrier of the barrier body is sealed to the peripheral portion of the angle member, liquefied gas storage tank. According to claim 8,
The corner insulation wall is provided with a step on the periphery,
The connection insulating wall is seated on the step of the corner insulating wall and the insulating wall adjacent to each other, the liquefied gas storage tank. The method of claim 9, wherein the corner insulating wall,
A liquefied gas storage tank having a different shape of the insulation material on the inside and outside based on the outer surface of the step, or a shape in which the shape of the insulation material is changed in an inward and outward direction outside the outer surface of the step. A vessel having the liquefied gas storage tank according to any one of claims 1 to 10.

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