KR102588985B1 - Liquefied gas storage tank and vessel having the same - Google Patents

Abstract

The liquefied gas storage tank of the present invention includes a primary barrier made of metal that forms a receiving space for accommodating cryogenic substances; A primary insulation wall provided outside the primary barrier; A connecting insulation wall provided in the space between neighboring primary insulation walls; a heat convection prevention member provided in a gap between the primary insulation wall and the connecting insulation wall; a secondary barrier provided outside the primary insulation wall; and a secondary insulation wall provided outside the secondary barrier, wherein the heat convection prevention member includes a first heat convection prevention unit attached to a side of the connecting insulation wall; And it may include a second thermal convection prevention unit having a shape in which one end of the first thermal convection prevention member is bent and extended to the primary insulation wall.

Description

Liquefied gas storage tank and vessel containing the same {LIQUEFIED GAS STORAGE TANK AND VESSEL HAVING THE SAME}

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

In order to store and transport materials such as hydrogen, oxygen, and natural gas in large quantities, low-temperature liquefaction methods are mainly used to convert hydrogen, oxygen, and natural gas into high-pressure, low-temperature liquefied gas. In designing an insulated container for storing and transporting such low-temperature liquefied gas, insulation technology to prevent boiling of the liquefied gas due to heat intrusion from the outside is important.

Insulation methods currently being applied commercially include external insulation methods and internal insulation methods. The internal insulation method has the advantage of controlling the temperature of the container enclosure to be similar to the outside temperature, so there are no restrictions on the use of materials such as low-temperature materials. As such an internal insulation method, a membrane-type insulation system having a double barrier structure based on an intermediate barrier structure is known.

The membrane insulation system is a double barrier structure that includes an upper/lower insulation panel as an insulation member, a membrane metal panel forming a primary barrier on the upper insulation panel, and a secondary barrier installed to be located between the upper/lower insulation panels. You can have

The secondary barrier is a space formed between the upper and lower insulation panels, that is, a rigid secondary barrier is attached to the upper surface of the lower insulation panel, and the gap between the laminates of the lower insulation panel and the rigid secondary barrier is covered by the auxiliary barrier. It can have a structure.

Meanwhile, neighboring upper insulation panels may be arranged to be spaced apart from each other, and a connected insulation panel may be placed in the space between them. Even if the upper insulation panel and the connecting insulation panel are precisely arranged, a predetermined space may be formed between them. Heat convection may occur in the space between the upper insulation panel and the connecting insulation panel, and heat convection may reduce the insulation performance of the liquefied gas storage tank.

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 address the path of the heat convection phenomenon caused by the upper and lower temperature difference inside the gap formed between the primary insulation wall and the connecting insulation wall. The purpose is to provide a liquefied gas storage tank that can block and a ship containing the same.

A liquefied gas storage tank according to one aspect of the present invention includes a primary barrier made of metal that forms a receiving space for accommodating cryogenic substances; A primary insulation wall provided outside the primary barrier; A connecting insulation wall provided in the space between neighboring primary insulation walls; a heat convection prevention member provided in a gap between the primary insulation wall and the connecting insulation wall; a secondary barrier provided outside the primary insulation wall; and a secondary insulation wall provided outside the secondary barrier, wherein the heat convection prevention member includes a first heat convection prevention unit attached to a side of the connecting insulation wall; And it may include a second thermal convection prevention unit having a shape in which one end of the first thermal convection prevention member is bent and extended to the primary insulation wall.

Specifically, the connection insulation wall includes connection plywood provided on the outside of the primary barrier; and a connection insulation material provided on the outside of the connection plywood, and the first heat convection prevention portion may be attached to a side of the connection insulation material.

Specifically, the length of the second thermal convection prevention portion may be greater than or equal to the width of the gap between the first insulation wall and the connecting insulation wall.

Specifically, the height of the other end of the second thermal convection prevention unit may be greater than the height of one end of the second thermal convection prevention unit.

Specifically, the heat convection prevention member may include glass cloth.

A ship according to one aspect of the present invention may be equipped with the liquefied gas storage tank described above.

The liquefied gas storage tank according to the present invention and the ship containing the same achieve excellent insulation effects by blocking the path of the thermal convection phenomenon caused by the upper and lower temperature difference inside the gap formed between the primary insulation wall and the connecting insulation wall. You can.

1 is a partial cross-sectional view illustrating a liquefied gas storage tank according to an embodiment of the present invention.
FIG. 2 is a partially exploded perspective view illustrating the liquefied gas storage tank shown in FIG. 1.
FIG. 3 is a diagram for explaining the primary barrier of the liquefied gas storage tank shown in FIGS. 1 and 2.
Figures 4 and 5 are cross-sectional views for explaining a method of manufacturing a liquefied gas storage tank according to an embodiment of the present invention.
Figure 6 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention.
Figures 7 and 8 are cross-sectional views for explaining a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention.
Figure 9 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention.
10 and 11 are cross-sectional views for explaining a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention.
Figure 12 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention.
Figures 13 and 14 are cross-sectional views for explaining a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention.
Figure 15 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention.
Figures 16 and 17 are cross-sectional views for explaining a method of manufacturing a liquefied gas storage tank according to another 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.

In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Additionally, terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Hereinafter, in this specification, liquefied gas may be used to encompass all gas fuels that are generally stored in a liquid state, such as LNG or LPG, ethylene, ammonia, etc. For convenience, even if it is not in a liquid state by heating or pressurizing, it is referred to as liquefied gas. It can be expressed as This can also be applied to boil-off gas. In addition, for convenience, LNG can be used to encompass both NG (Natural Gas) in a liquid state as well as LNG in a supercritical state, and boil-off gas can be used to include not only gaseous boil-off gas but also liquefied boil-off gas. You can.

The present invention also includes a ship equipped with a liquefied gas storage tank described below. At this time, the ship can be at least 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, marine plants, etc. .

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

FIG. 1 is a partial cross-sectional view for explaining a liquefied gas storage tank according to an embodiment of the present invention, FIG. 2 is a partial exploded perspective view for explaining the liquefied gas storage tank shown in FIG. 1, and FIG. 3 is FIG. 1 and This is a diagram for explaining the primary barrier of the liquefied gas storage tank shown in FIG. 2.

Referring to FIGS. 1 to 3, the liquefied gas storage tank 1 is provided on a ship and can store liquefied gas such as LNG, which is a cryogenic (approximately -160°C to -170°C) material.

A ship equipped with a liquefied gas storage tank (1) described below, although not shown, is a concept that encompasses not only merchant ships that transport cargo from the point of origin to the destination, but also marine structures that float at a certain point on the sea and perform specific tasks. You can. Additionally, in the present invention, the liquefied gas storage tank 1 may include any type of tank that stores liquefied gas.

The liquefied gas storage tank 1 includes a primary barrier 2 in contact with the liquefied gas, a primary insulation wall 3 installed outside the primary barrier 2, and a primary insulation wall 3 outside the primary insulation wall 3. It may be configured to include a secondary barrier (4) installed and a secondary insulation wall (5) disposed outside the secondary barrier (4). The liquefied gas storage tank (1) can be supported on the hull (7) by mastic (6) installed between the secondary insulation wall (5) and the hull (7).

The liquefied gas storage tank (1) may need to optimize the thickness of the primary insulation wall (3) and secondary insulation wall (5) in order to optimize insulation performance and storage capacity. For example, when polyurethane foam is used as the main material of the primary insulation wall (3) and the secondary insulation wall (5), the thickness of the primary insulation wall (3) and the thickness of the secondary insulation wall (5) are combined. The overall thickness can range from 250mm to 500mm.

The liquefied gas storage tank 1 may include flat and corner structures. 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. Here, the corner structure may include an obtuse angle corner structure or a right angle corner structure. When the thickness of the primary insulation wall 3 or the secondary insulation wall 5 is changed, a change in the obtuse corner structure or the right angle corner structure may be accompanied.

The primary barrier 2 forms a receiving space that accommodates liquefied gas, which is a cryogenic substance, and may be made of a metal material. For example, the metal material may be stainless steel, but is not limited thereto. The primary barrier (2), together with the secondary barrier (4), can prevent liquefied gas from leaking to the outside.

The primary barrier (2) is fixedly coupled to the upper part of the primary insulation wall (3) by an anchor strip (not shown) so as to be in direct contact with the liquefied gas, which is a cryogenic material stored in the liquefied gas storage tank (1). Can be installed.

The primary barrier (2) includes a flat portion (21) in contact with the upper surface of the primary insulation wall (3), a curved portion (22) for relieving contraction or expansion stress due to temperature, and a flat portion (21). It can be divided into a boundary portion 23 between and a curved portion 22. For example, it may be formed as a corrugation membrane sheet made of stainless steel with a thickness of 1.0 to 1.5 mm, and preferably with a thickness of 1.0 to 1.2 mm. That is, the primary barrier may be formed in a wrinkle shape.

The primary barrier 2 may be formed to have a wrinkle shape having a first radius of curvature (R1) and a second radius of curvature (R2). That is, the primary barrier 2 of the present embodiment forms a first radius of curvature (R1) at the boundary portion 23 between the flat portion 21 and the curved portion 22, and the curved portion 22 has a second radius of curvature. It can be formed to have two types of radii of curvature (R1, R2) forming (R2). For example, the first radius of curvature (R1) may be formed to be smaller than the second radius of curvature (R2). The primary barrier (2), which has a radius of curvature (R1, R2), has a gentle curve at the top, making it easy for welding inspection, and can also flexibly respond to sloshing because the fluid hitting it from the side flows right through it. .

In addition, the primary barrier 2 can have horizontal and vertical corrugations of the same size throughout the entire area without distinction between large corrugation and small corrugation. That is, since the horizontal and vertical wrinkle sizes are the same throughout the primary barrier 2, manufacturing of the primary barrier 2 can be easy.

The primary insulation wall (3) is designed to block heat intrusion from the outside and withstand shock from the outside or shock from internal liquefied gas sloshing, and the primary barrier (2) and the secondary barrier ( 4) Can be installed in between.

The primary insulation wall (3) may have a structure in which primary plywood (31) and primary insulation material (32) are sequentially stacked on the outside of the primary barrier (2), and the primary plywood (31) It may correspond to the combined thickness of the thickness of and the thickness of the primary insulation material 32. The primary insulation wall 3 may be formed to have a thickness of 100 mm to 250 mm. Additionally, the thickness of the primary insulation wall 3 may account for 25% to 75% of the total thickness of the liquefied gas storage tank 1.

The primary insulation wall (3) is designed to block heat intrusion from the outside and withstand shock from the outside or shock from internal liquefied gas sloshing, and the primary barrier (2) and the secondary barrier ( 4) Can be installed in between.

The primary plywood 31 may be installed between the primary barrier 2 and the primary insulation 32. The primary plywood 31 may be formed to have a thickness of 6.5 mm to 200 mm.

The primary insulation material 32 can be formed of a material with excellent insulation performance and excellent mechanical strength so as to block heat intrusion from the outside and withstand shock from the outside or shock from sloshing of liquefied gas from the inside. there is.

The primary insulation material 32 may be formed of polyurethane foam between the primary plywood 31 and the secondary barrier 4, and may be formed to a thickness of 100 mm to 250 mm. Additionally, the thickness of the primary insulation material 32 may account for 25% to 75% of the total thickness of the liquefied gas storage tank 1.

Part of the primary insulation wall (3), the secondary barrier (4), and the secondary insulation wall (5) may be stacked to form a unit element. Here, a part of the primary insulation wall (3) forming the unit element can be defined as a fixed insulation wall (3b), and has a width smaller than the width of the secondary insulation wall (5) included in the unit element. You can. In addition, the fixed insulation wall (3b), the secondary barrier (4), and the secondary insulation wall (5) may be arranged in a pre-fixed state, but are not limited to this, and each may be separated to form a liquefied gas storage tank (1). ) could also be placed within. As a result, a portion of the secondary barrier (4) may be exposed on both sides of the primary insulation wall (3). Unit elements may be arranged adjacent to each other, and in this case, a connecting insulation wall (3a) may be installed in the space between neighboring primary insulation walls (3), that is, in the space where the secondary barrier (4) is exposed.

The secondary barrier (4) can be divided into a main barrier (41) and an auxiliary barrier (42). The main barrier (41) is installed on the upper part of the secondary insulation wall (5) in the unit element, and the auxiliary barrier (42) ) can be installed between the exposed main barrier 41 and the connection insulation wall (3a). At this time, the auxiliary barrier 42 may be provided to interconnect the main barrier 41 provided in adjacent unit elements. That is, unit elements arranged adjacently can be closed by the auxiliary barrier 42 and the connecting insulation wall 3a stacked on the main barrier 41.

The main barrier 41 and the auxiliary barrier 42 may have a composite sheet structure like the secondary barrier 4.

The secondary barrier 4 is basically made by attaching a glass fiber sheet to both sides of an aluminum sheet, and its rigidity may vary depending on the thickness of the aluminum sheet or the resin used. A rigid secondary barrier made by impregnating a thermosetting resin into a glass fiber sheet is called a rigid secondary barrier (RSB), and a flexible secondary barrier made by attaching a glass fiber sheet to an aluminum sheet using an adhesive is called a rigid secondary barrier. It is called a secondary barrier (FSB, Flexible Secondary Barrier).

In this embodiment, the main barrier 41 may be composed of a rigid secondary barrier, and the auxiliary barrier 42 may be composed of a flexible secondary barrier.

The connection insulation wall (3a) may be provided in the form of a stack of connection plywood (31a) and connection insulation material (32a) that are the same or similar to those described in the primary insulation wall (3) forming a unit element, and in this specification, 1 Note that the secondary insulation wall (3) may encompass the connecting insulation wall (3a) and the fixed insulation wall (3b).

The connection insulation wall 3a may have a structure in which connection plywood 31a and connection insulation material 32a are stacked. The thickness of the connection insulation wall 3a may correspond to the combined thickness of the connection plywood 31a and the thickness of the connection insulation material 32a.

The connecting plywood (31a) may be formed to have a thickness of 6.5 mm to 200 mm.

The connection insulation material 32a may be formed of polyurethane foam between the connection plywood 31a and the auxiliary barrier 42 of the secondary barrier 4, and may be formed to a thickness of 100 mm to 250 mm. Additionally, the thickness of the connecting insulation material 32a may account for 25% to 75% of the total thickness of the liquefied gas storage tank 1.

As described above, the primary insulation material 32 of the primary insulation wall 3 and the connection insulation material 32a of the connection insulation wall 3a may have the same thickness. However, in the case of the connection insulation material 32a of the connection insulation wall 3a, the auxiliary barrier 42 is further stacked at the bottom in addition to the main barrier 41 of the secondary barrier 4, so the connection of the connection insulation wall 3a The insulation material 32a may have a thickness smaller than the thickness of the primary insulation material 32 of the primary insulation wall 3 by the thickness of the auxiliary barrier 42.

The above-described connecting insulation wall (3a) blocks heat intrusion from the outside while sealing the space created between the neighboring secondary insulation walls (5) together with the auxiliary barrier (42) when unit elements are arranged adjacent to each other. It can be installed to perform the following roles:

Meanwhile, the primary insulation wall 3 and the connecting insulation wall 3a may be arranged to be spaced apart from each other at a predetermined distance. That is, a gap exists between the primary insulation wall 3 and the connecting insulation wall 3a, and thermal convection may occur at the top and bottom of the gap due to temperature difference.

In order to prevent the above-described thermal convection, at least one thermal convection prevention member (TCP1) may be provided in the gap between the primary insulation wall 3 and the connecting insulation wall 3a, and in Figure 1, the thermal convection prevention member (TCP1) shows as an example a structure in which three are provided between the primary insulation wall (3) and the connecting insulation wall (3a).

The thermal convection prevention member (TCP1) may include glass cloth. Glass cloth is a fiber material woven with glass fiber yarn and can have excellent thermal insulation effects.

The thermal convection prevention member TCP1 may include a first thermal convection prevention part TCP11 and a second thermal convection prevention part TCP12.

The first thermal convection prevention part (TCP11) is attached to the side of the connection insulation wall (3a) to prevent the heat convection prevention member (TCP1) from leaving between the first insulation wall (3) and the connection insulation wall (3a). can do.

The second thermal convection prevention unit (TCP12) is bent at one end of the first thermal convection prevention unit (TCP11), for example, at the bottom of the first thermal convection prevention unit (TCP11) and extends to the primary insulation wall (3). It can have a shape. To explain this in more detail, one end of the second thermal convection prevention unit TCP12 may be connected to one end of the first thermal convection prevention unit TCP11, for example, to the lower end of the first thermal convection prevention unit TCP11. Additionally, the other end of the second thermal convection prevention portion (TCP12) may contact the primary insulation wall (3). Here, the length of the second thermal convection prevention part (TCP12) may be greater than or equal to the width of the gap between the first thermal convection prevention part (TCP11) and the primary insulation wall 3. Accordingly, the second thermal convection prevention unit (TCP12) can cover the gap between the first thermal convection prevention unit (TCP11) and the primary insulation wall (3). Additionally, the height of the other end of the second thermal convection prevention unit TCP12 may be higher than the height of one end of the second thermal convection prevention unit TCP12.

The thermal convection prevention member TCP1 as described above can block the path of thermal convection phenomenon caused by the upper and lower temperature difference inside the gap formed between the primary insulation wall 3 and the connecting insulation wall 3a.

On the other hand, since the connection insulation wall (3a) has a structure inserted between neighboring fixed insulation walls (3b) forming a unit element, it protects the secondary barrier (4) below the connection insulation wall (3a) from cryogenic temperatures. You can't help but be vulnerable. Accordingly, there is a high possibility that a problem will occur in the secondary barrier (4) below the connecting insulation wall (3a) where the main barrier (41) and the auxiliary barrier (42) overlap. Accordingly, the following description will focus on the connection insulation wall 3a.

The secondary barrier (4) can be installed between the primary insulation wall (3) and the secondary insulation wall (5) encompassing the connecting insulation wall (3a), and allows liquefied gas to flow together with the primary barrier (2). Leakage to the outside can be prevented.

The secondary barrier (4) at the bottom of the fixed insulation wall (3b) is a single barrier and includes the main barrier (41), and the secondary barrier (4) at the bottom of the connecting insulation wall (3a) is the main barrier that connects unit elements to each other. It may include a barrier 41 and an auxiliary barrier 42 provided on the secondary insulation wall 5 forming a unit element.

The main barrier 41 is provided on the secondary insulating wall 5 forming a unit element and may be formed with a thickness of 0.6 mm to 1.0 mm, and the main barrier 41 adjacent to each other is laminated with the auxiliary barrier 42. Confidentiality can be achieved by doing so.

The auxiliary barrier 42 is a structure that connects unit elements to each other and may be formed to have a thickness of 0.6 mm to 1.0 mm and may be laminated on the main barrier 41.

Meanwhile, the secondary insulation wall 5, together with the fixed insulation wall 3b and the connecting insulation wall 3a, blocks heat intrusion from the outside and protects against shock from the outside or shock due to sloshing of liquefied gas from the inside. It can be designed to withstand. Additionally, the secondary insulation wall 5 may be installed between the secondary barrier 4 and the hull 7, and may include a secondary insulation material 51 and secondary plywood 52.

The secondary insulation wall 5 may have a structure in which a secondary insulation material 51 and a secondary plywood 52 are sequentially stacked on the outside of the secondary barrier 4, and the secondary insulation material 51 The total thickness of the thickness of the secondary plywood 52 may be 100 mm to 250 mm. Additionally, the thickness of the secondary insulation wall 5 may account for 25% to 75% of the total thickness of the liquefied gas storage tank 1.

The secondary insulation material 51 can be formed of a material with excellent insulation performance and excellent mechanical strength so as to block heat intrusion from the outside and withstand shock from the outside or shock from sloshing of liquefied gas from the inside. there is.

The secondary insulation 51 may be formed of polyurethane foam between the secondary barrier 4 and the secondary plywood 52, and may be formed to a thickness of 100 mm to 250 mm. Additionally, the thickness of the secondary insulation 51 may account for 25% to 75% of the total thickness of the liquefied gas storage tank 1.

Secondary plywood 52 may be installed between the secondary insulation 51 and the hull 7. For example, the secondary insulation 51 may also be installed in contact with the secondary plywood 52. The secondary plywood 52 may be formed to have a thickness of 6.5 mm to 200 mm.

Meanwhile, in the liquefied gas storage tank 1 according to the present embodiment, the primary insulation wall 3 has a thickness of 66% to 166% of the secondary insulation wall 5, and is attached to the primary insulation wall 3. The encompassing connection insulation wall (3a) has a thickness of 67% to 167% of the secondary insulation wall (5), so that the connection insulation wall (3a) has the same or similar thickness as the secondary insulation wall (5). It can be configured. In relation to this configuration, the connection insulation material 32a of the connection insulation wall 3a is made to have a thickness of 90% to 110% of the secondary insulation material 51, so that the connection insulation material 32a of the connection insulation wall 3a is It may be configured to have the same or similar thickness as the secondary insulation 51. In this embodiment, no detailed reference is made to the part of the fixed insulation wall (3b) that forms a unit element when encompassing the connecting insulation wall (3a), but in relation to the secondary insulation wall (5), the fixed insulation wall (3b) is also connected. It may be the same or similar to the insulating wall 3a.

When the connection insulation wall 3a and the secondary insulation wall 5 or the connection insulation material 32a and the secondary insulation material 51 of the connection insulation wall 3a are formed at this thickness ratio, the thickness of the secondary barrier 4 The upper stress limit at low temperature may correspond to 50 MPa or less at the lower part of the connecting insulating wall 3a. Additionally, specifically, the stress value of the secondary barrier 4 at low temperature may be 40 MPa to 50 MPa at the lower part of the connecting insulation wall 3a.

As described above, the liquefied gas storage tank of the present invention has a heat convection prevention member (TCP1) disposed between the primary insulation wall (3) and the connection insulation wall (3a), and is connected to the primary insulation wall (3). It is possible to block the path of thermal convection phenomenon caused by the temperature difference between the upper and lower parts inside the gap formed between the walls 3a. Therefore, the insulation efficiency of the liquefied gas storage tank can be improved.

Below, with reference to FIGS. 4 and 5 along with FIGS. 1 to 3, a method of manufacturing a liquefied gas storage tank according to an embodiment of the present invention will be described.

Figures 4 and 5 are cross-sectional views for explaining a method of manufacturing a liquefied gas storage tank according to an embodiment of the present invention.

First, referring to FIG. 4, a unit insulation structure including a secondary insulation wall 5, a main barrier 41, and a primary insulation wall 3 is prepared.

The unit insulation structure can be manufactured as follows.

First, prepare the secondary insulation wall (5). The secondary insulation wall 5 may be comprised of a secondary insulation material 51 and secondary plywood 52. Here, the secondary insulation material 51 is disposed adjacent to the hull 7, and the secondary plywood 52 may be disposed on the secondary insulation material 51.

Then, the main barrier 41 can be installed on the secondary insulation wall 5 including the secondary insulation 51 and secondary plywood 52. The main barrier 41 is provided on the secondary insulating material 51 and can cover the secondary insulating material 51. Additionally, the main barrier 41 may have a structure in which glass fiber sheets are adhered to both sides of an aluminum sheet. Here, the glass fiber sheet may be impregnated with a thermosetting resin to provide rigidity. That is, the main barrier 41 may be a rigid secondary barrier (RSB).

After installing the main barrier 41 on the secondary insulation wall 5, the primary insulation wall 3 is installed on the main insulation wall 41 to manufacture a unit insulation structure. Here, the width and length of the primary insulation wall 3 may be smaller than the width and length of the secondary insulation wall 5.

The primary insulation wall 3 may include primary plywood 31 and primary insulation material 32. The primary plywood 31 may be provided on the primary insulating material 32, and the primary insulating material 32 may be provided between the main barrier 41 and the primary plywood 31.

Meanwhile, the primary insulation wall 3 can be manufactured in various shapes. For example, the primary insulation wall 3 can be manufactured by installing the primary insulation material 32 on the main barrier 41 and installing the primary plywood 31 on the primary insulation material 32. there is. Additionally, the primary insulation wall 3 may be manufactured by installing a laminate of the primary insulation material 32 and primary plywood 31 on the main barrier 41.

After preparing the unit insulation structure, a plurality of unit insulation structures are installed on the inner surface of the hull 7. Here, the mystic may be pre-installed on the surface of the secondary plywood 52 of the unit insulation structure. Neighboring unit insulation structures may be arranged to be spaced apart from each other at regular intervals. Accordingly, a predetermined space may be formed between neighboring primary insulating walls 3, and a predetermined gap may occur between neighboring secondary insulating walls 5.

After installing a plurality of unit insulation structures, the secondary barrier 4 can be manufactured by installing an auxiliary barrier 42 that covers the gap between neighboring secondary insulation walls 5. That is, the secondary barrier 4 may be composed of a main barrier 41 and an auxiliary barrier 42.

Here, the auxiliary barrier 42 may have a structure in which a glass fiber sheet is attached to an aluminum sheet using an adhesive. Therefore, the auxiliary barrier 42 may be a flexible secondary barrier (FSB).

After installing the auxiliary barrier 42, prepare a connecting insulation wall 3a that can be installed in the space between neighboring primary insulation walls 3.

Here, the connection insulation wall 3a may have a structure in which connection plywood 31a and connection insulation material 32a are laminated. Here, the connecting insulating material 32a may be disposed toward the auxiliary barrier 42, and the connecting plywood 31a may be disposed on the connecting insulating material 32a.

Meanwhile, at least one heat convection prevention member (TCP1) may be provided on the side of the connection insulator (32a). The thermal convection prevention member (TCP1) may include glass cloth.

The thermal convection prevention member TCP1 may include a first thermal convection prevention part TCP11 and a second thermal convection prevention part TCP12. The first thermal convection prevention part (TCP11) is attached to the side of the connection insulation wall (3a) to prevent the heat convection prevention member (TCP1) from leaving between the first insulation wall (3) and the connection insulation wall (3a). can do. One end of the second thermal convection prevention unit (TCP12) is connected to the lower end of the first thermal convection prevention unit (TCP11) and may have a bent shape. Here, the length of the second thermal convection prevention part TCP12 may be greater than the distance between the side surface of the primary insulation wall 3 and the side surface of the connecting insulation wall 3a.

Referring to Figure 5, the connection insulation wall (3a) with the thermal convection prevention member (TCP1) attached to the side of the connection insulation (32a) is inserted into the space between the neighboring primary insulation walls (3), and the auxiliary barrier ( 42) Install it on the table.

At this time, since the length of the second thermal convection prevention portion (TCP12) is greater than the distance between the side surface of the primary insulation wall (3) and the side surface of the connection insulation wall (3a), when the connection insulation material (32a) is inserted, the second thermal insulation wall (32a) is inserted. The other end of the thermal convection prevention unit (TCP12) is located higher than one end connected to the first thermal convection prevention unit (TCP11) and may be in contact with the side of the primary insulator (32). Accordingly, the second thermal convection prevention unit (TCP12) can cover the gap between the first thermal convection prevention unit (TCP11) and the primary insulation wall (3).

As described above, when the thermal convection prevention member TCP1 is disposed in the gap between the primary insulation wall 3 and the connection insulation wall 3a, the gap between the primary insulation wall 3 and the connection insulation wall 3a The thermal convection phenomenon caused by the temperature difference between the top and bottom of the gap can be prevented.

After installing the connection insulation wall (3a) to which the thermal convection prevention member (TCP1) is attached to the side of the connection insulation (32a), as shown in FIGS. 1 to 3, the primary insulation wall (3) and the connection By installing the primary barrier (2) on the insulating wall (3a), a liquefied gas storage tank according to an embodiment of the present invention can be manufactured.

Here, the primary barrier 2 forms an accommodating space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The primary barrier (2), together with the secondary barrier (4), can prevent liquefied gas from leaking to the outside.

The primary barrier (2) includes a flat portion (21) in contact with the upper surface of the primary insulation wall (3), a curved portion (22) for relieving contraction or expansion stress due to temperature, and a flat portion (21). It can be divided into a boundary portion 23 between and a curved portion 22. That is, the primary barrier 2 may be formed in a wrinkle shape.

Below, a liquefied gas storage tank according to other embodiments of the present invention will be described. Accordingly, the following description will focus on differences from the liquefied gas storage tank shown in FIGS. 1 to 5, and description of the same configuration may be omitted.

FIG. 6 is a partial cross-sectional view illustrating a liquefied gas storage tank according to another embodiment of the present invention, and FIGS. 7 and 8 are cross-sectional views illustrating a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention. .

Referring to FIGS. 6 to 8, the liquefied gas storage tank (1) includes a primary barrier (2) in contact with the liquefied gas, a primary insulation wall (3) installed on the outside of the primary barrier (2), 1 It may be configured to include a secondary barrier (4) installed outside the secondary insulation wall (3) and a secondary insulation wall (5) disposed outside the secondary barrier (4). The liquefied gas storage tank (1) can be supported on the hull (7) by mastic (6) installed between the secondary insulation wall (5) and the hull (7).

The primary barrier 2 forms a receiving space that accommodates liquefied gas, which is a cryogenic substance, and may be made of a metal material.

The primary insulation wall 3 may have a structure in which primary plywood 31 and primary insulation 32 are sequentially stacked on the outside of the primary barrier 2. The primary plywood 31 may be installed between the primary barrier 2 and the primary insulation 32. The primary insulation material 32 may be formed of polyurethane foam between the primary plywood 31 and the secondary barrier 4.

The secondary barrier (4) may be installed between the primary insulation wall (3) and the secondary insulation wall (5) encompassing the connecting insulation wall (3a), and together with the primary barrier (2), the liquefied gas can be prevented from flowing to the outside. Leakage can be prevented. The secondary barrier (4) can be divided into a main barrier (41) and an auxiliary barrier (42). The main barrier (41) is installed on the upper part of the secondary insulation wall (5) in the unit element, and the auxiliary barrier (42) ) can be installed between the exposed main barrier 41 and the connection insulation wall (3a).

The connection insulation wall 3a may be provided in a form in which connection plywood 31a and connection insulation material 32a are laminated in the same or similar manner as described for the primary insulation wall 3 forming a unit element.

A gap may exist between the primary insulation wall 3 and the connecting insulation wall 3a. At least one heat convection prevention member TCP2 may be provided in the gap between the primary insulation wall 3 and the connection insulation wall 3a.

The thermal convection prevention member (TCP2) may include glass wool. Glass wool is an insulating material manufactured using glass fibers as a binder, and can have high insulation properties because air is placed between the glass fibers.

The thermal convection prevention member (TCP2) is attached to the side of the connection insulation wall (3a), and is compressed in the space formed by the connection insulation wall (3a), the fixed insulation wall (3b), and the secondary barrier (4). can be inserted. The thermal convection prevention member TCP2 may be inserted into the above-described space together with the connection insulation wall 3a and then decompressed.

That is, the thermal convection prevention member TCP2 in the decompressed state has one end attached to the connection insulation material 32a of the connection insulation wall 3a, and the other end is attached to the primary insulation material 32 of the primary insulation wall 3. You can stay in contact with.

The thermal convection prevention member TCP2 as described above can block the path of thermal convection phenomenon caused by the upper and lower temperature difference inside the gap formed between the primary insulation wall 3 and the connecting insulation wall 3a.

The secondary insulation wall 5 may be installed between the secondary barrier 4 and the hull 7, and may include a secondary insulation material 51 and secondary plywood 52.

Below, a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention will be described with reference to FIGS. 6 to 8.

First, a unit insulation structure including the secondary insulation wall 5, the main barrier 41, and the primary insulation wall 3 is prepared, and a plurality of unit insulation structures are installed on the inner surface of the hull 7.

After installing a plurality of unit insulation structures, the secondary barrier 4 can be manufactured by installing an auxiliary barrier 42 that covers the gap between the secondary insulation walls 5 that are adjacent to each other.

After installing the auxiliary barrier 42, a connecting insulation wall 3a that can be installed in the space between adjacent primary insulation walls 3 is prepared. Here, at least one heat convection prevention member (TCP2) may be provided on the side of the connection insulator (32a).

The thermal convection prevention member (TCP2) includes glass wool and may be in a compressed state.

A connection insulation wall (3a) with a thermal convection prevention member (TCP2) attached to the side of the connection insulation (32a) is inserted into the space between adjacent primary insulation walls (3) and installed on the auxiliary barrier (42). do.

Then, when the compression of the thermal convection prevention member TCP2 is released, the thermal convection prevention member TCP2 may expand. When the thermal convection prevention member (TCP2) expands, one end of the thermal convection prevention member (TCP2) may be attached to the connection insulation material (32a), and the other end of the thermal convection prevention member (TCP2) may contact the primary insulation material (32). there is.

After installing the connection insulation wall (3a), as shown in FIG. 6, the primary barrier (2) is installed on the first insulation wall (3) and the connection insulation wall (3a), and one of the present invention A liquefied gas storage tank according to the embodiment can be manufactured.

Figure 9 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention, and Figures 10 and 11 are for explaining a manufacturing method of a liquefied gas storage tank according to another embodiment of the present invention. These are cross-sectional views.

9 to 11, the liquefied gas storage tank (1) includes a primary barrier (2) in contact with the liquefied gas, a primary insulation wall (3) installed on the outside of the primary barrier (2), 1 It may be configured to include a secondary barrier (4) installed outside the secondary insulation wall (3) and a secondary insulation wall (5) disposed outside the secondary barrier (4). The liquefied gas storage tank (1) can be supported on the hull (7) by mastic (6) installed between the secondary insulation wall (5) and the hull (7).

The primary barrier 2 forms a receiving space that accommodates liquefied gas, which is a cryogenic substance, and may be made of a metal material.

The primary insulation wall 3 may have a structure in which primary plywood 31 and primary insulation 32 are sequentially stacked on the outside of the primary barrier 2.

The primary plywood 31 may be installed between the primary barrier 2 and the primary insulation 32.

The primary insulation material 32 may be formed of polyurethane foam between the primary plywood 31 and the secondary barrier 4. At least one groove (GP) in a groove shape may be provided on the exposed side of the primary insulation material 32. Here, the groove GP may have a flat surface at the bottom and an inclined surface that slopes upward from the end of the flat surface. Here, the slope may have a rounded shape where the slope decreases toward the top.

The secondary barrier (4) may be installed between the primary insulation wall (3) and the secondary insulation wall (5) encompassing the connecting insulation wall (3a), and together with the primary barrier (2), the liquefied gas can be prevented from flowing to the outside. Leakage can be prevented. The secondary barrier (4) can be divided into a main barrier (41) and an auxiliary barrier (42). The main barrier (41) is installed on the upper part of the secondary insulation wall (5) in the unit element, and the auxiliary barrier (42) ) can be installed between the exposed main barrier 41 and the connection insulation wall (3a).

The connection insulation wall 3a may be provided in a form in which connection plywood 31a and connection insulation material 32a are laminated in the same or similar manner as described for the primary insulation wall 3 forming a unit element.

At least one heat convection prevention member (TCP3) may be provided in the gap between the primary insulation wall 3 and the connection insulation wall 3a. The thermal convection prevention member (TCP3) may include a material that has elasticity as well as thermal insulation properties. The length of the thermal convection prevention member TCP3 may be larger than the width of the gap between the primary insulation wall 3 and the connecting insulation wall 3a.

The thermal convection prevention member TCP3 may have a plurality of wing shapes with one end connected to the side of the connection insulation wall 3a. The other end of the thermal convection prevention member (TCP3) can be inserted into the groove (GP) of the primary insulation material 32 to block the path of the thermal convection phenomenon.

The secondary insulation wall 5 may be installed between the secondary barrier 4 and the hull 7, and may include a secondary insulation material 51 and secondary plywood 52.

Below, a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention will be described with reference to FIGS. 9 to 11.

First, a unit insulation structure including the secondary insulation wall 5, the main barrier 41, and the primary insulation wall 3 is prepared, and a plurality of unit insulation structures are installed on the inner surface of the hull 7.

After installing a plurality of unit insulation structures, the secondary barrier 4 can be manufactured by installing an auxiliary barrier 42 that covers the gap between the secondary insulation walls 5 that are adjacent to each other.

After installing the auxiliary barrier 42, a connecting insulation wall 3a that can be installed in the space between adjacent primary insulation walls 3 is prepared. Here, at least one heat convection prevention member (TCP3) may be provided on the side of the connection insulator (32a). The thermal convection prevention member TCP3 may have a plurality of wing shapes with one end attached to the side of the connection insulation wall 3a.

A connection insulation wall (3a) with a thermal convection prevention member (TCP3) attached to the side of the connection insulation (32a) is inserted into the space between adjacent primary insulation walls (3) and installed on the auxiliary barrier (42). do. Here, since the thermal convection prevention member TCP3 has elasticity, the other end of the thermal convection prevention member TCP3 can be inserted into the groove portion GP of the primary insulation material 32. Accordingly, the thermal convection prevention member TCP3 can block the path of thermal convection phenomenon by shielding the gap between the primary insulation wall 3 and the connecting insulation wall 3a.

After installing the connection insulation wall (3a), as shown in FIG. 9, the primary barrier (2) is installed on the first insulation wall (3) and the connection insulation wall (3a), and one of the present invention A liquefied gas storage tank according to the embodiment can be manufactured.

Figure 12 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention, and Figures 13 and 14 are for explaining a manufacturing method of a liquefied gas storage tank according to another embodiment of the present invention. These are cross-sectional views.

Referring to FIGS. 12 to 14, the liquefied gas storage tank (1) includes a primary barrier (2) in contact with the liquefied gas, a primary insulation wall (3) installed on the outside of the primary barrier (2), 1 It may be configured to include a secondary barrier (4) installed outside the secondary insulation wall (3) and a secondary insulation wall (5) disposed outside the secondary barrier (4). The liquefied gas storage tank (1) can be supported on the hull (7) by mastic (6) installed between the secondary insulation wall (5) and the hull (7).

The primary barrier 2 forms a receiving space that accommodates liquefied gas, which is a cryogenic substance, and may be made of a metal material.

The primary insulation wall 3 may have a structure in which primary plywood 31 and primary insulation 32 are sequentially stacked on the outside of the primary barrier 2.

The primary plywood 31 may be installed between the primary barrier 2 and the primary insulation 32.

The primary insulation material 32 may be formed of polyurethane foam between the primary plywood 31 and the secondary barrier 4. At least one groove (GP) may be provided on the exposed side of the primary insulation material 32. Here, the groove GP may have a flat surface at the top and an inclined surface that slopes downward from the end of the flat surface. Here, the slope may have a rounded shape where the slope decreases toward the bottom.

The secondary barrier (4) may be installed between the primary insulation wall (3) and the secondary insulation wall (5) encompassing the connecting insulation wall (3a), and together with the primary barrier (2), the liquefied gas can be prevented from flowing to the outside. Leakage can be prevented. The secondary barrier (4) can be divided into a main barrier (41) and an auxiliary barrier (42). The main barrier (41) is installed on the upper part of the secondary insulation wall (5) in the unit element, and the auxiliary barrier (42) ) can be installed between the exposed main barrier 41 and the connection insulation wall (3a).

The connection insulation wall 3a may be provided in a form in which connection plywood 31a and connection insulation material 32a are laminated in the same or similar manner as described for the primary insulation wall 3 forming a unit element.

At least one heat convection prevention member TCP4 may be provided in the gap between the primary insulation wall 3 and the connection insulation wall 3a. The thermal convection prevention member TCP4 may include a material that has elasticity as well as thermal insulation properties.

The thermal convection prevention member TCP4 may have a plurality of wing shapes with one end attached to the side of the connection insulation wall 3a. The other end of the thermal convection prevention member (TCP4) can be inserted into the groove (GP) of the primary insulation material 32 to block the path of thermal convection phenomenon.

The secondary insulation wall 5 may be installed between the secondary barrier 4 and the hull 7, and may include a secondary insulation material 51 and secondary plywood 52.

Below, a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention will be described with reference to FIGS. 12 to 14.

First, a unit insulation structure including the secondary insulation wall 5, the main barrier 41, and the primary insulation wall 3 is prepared, and a plurality of unit insulation structures are installed on the inner surface of the hull 7.

After installing a plurality of unit insulation structures, the secondary barrier 4 can be manufactured by installing an auxiliary barrier 42 that covers the gap between the secondary insulation walls 5 that are adjacent to each other.

After installing the auxiliary barrier 42, a connecting insulation wall 3a that can be installed in the space between adjacent primary insulation walls 3 is prepared. Here, at least one heat convection prevention member (TCP4) may be provided on the side of the connection insulator (32a). The thermal convection prevention member TCP4 may have a plurality of wing shapes with one end attached to the side of the connection insulation wall 3a.

A connection insulation wall (3a) with a thermal convection prevention member (TCP4) attached to the side of the connection insulation material (32a) is inserted into the space between adjacent primary insulation walls (3) and installed on the auxiliary barrier (42). do.

Here, the thermal convection prevention member TCP4 has elasticity, but the groove portion GP may not be inserted into the other end of the thermal convection prevention member TCP4. Therefore, the other end of the thermal convection prevention member TCP4 can be inserted into the groove GP by using a separate wedge-like insertion device ID.

When the other end of the thermal convection prevention member (TCP4) is inserted into the groove (GP), the thermal convection prevention member (TCP4) shields the gap between the primary insulation wall (3) and the connecting insulation wall (3a), It can block the path of tropical convection phenomenon.

After installing the connection insulation wall (3a), as shown in FIG. 9, the primary barrier (2) is installed on the first insulation wall (3) and the connection insulation wall (3a), and one of the present invention A liquefied gas storage tank according to the embodiment can be manufactured.

Figure 15 is a partial cross-sectional view for explaining a liquefied gas storage tank according to another embodiment of the present invention, and Figures 16 and 17 are for explaining a manufacturing method of a liquefied gas storage tank according to another embodiment of the present invention. These are cross-sectional views.

Referring to FIGS. 15 to 17, the liquefied gas storage tank (1) includes a primary barrier (2) in contact with the liquefied gas, a primary insulation wall (3) installed on the outside of the primary barrier (2), 1 It may be configured to include a secondary barrier (4) installed outside the secondary insulation wall (3) and a secondary insulation wall (5) disposed outside the secondary barrier (4). The liquefied gas storage tank (1) can be supported on the hull (7) by mastic (6) installed between the secondary insulation wall (5) and the hull (7).

The primary barrier 2 forms a receiving space that accommodates liquefied gas, which is a cryogenic substance, and may be made of a metal material.

The primary insulation wall 3 may have a structure in which primary plywood 31 and primary insulation 32 are sequentially stacked on the outside of the primary barrier 2.

The primary plywood 31 may be installed between the primary barrier 2 and the primary insulation 32.

The primary insulation material 32 may be formed of polyurethane foam between the primary plywood 31 and the secondary barrier 4.

The secondary barrier (4) may be installed between the primary insulation wall (3) and the secondary insulation wall (5) encompassing the connecting insulation wall (3a), and together with the primary barrier (2), the liquefied gas can be prevented from flowing to the outside. Leakage can be prevented. The secondary barrier (4) can be divided into a main barrier (41) and an auxiliary barrier (42). The main barrier (41) is installed on the upper part of the secondary insulation wall (5) in the unit element, and the auxiliary barrier (42) ) can be installed between the exposed main barrier 41 and the connection insulation wall (3a).

The connection insulation wall 3a may be provided in a form in which connection plywood 31a and connection insulation material 32a are laminated in the same or similar manner as described for the primary insulation wall 3 forming a unit element. Here, the side surface of the connection insulating material 32a may have a step. For example, the connection insulator 32a may have a side step (SS) provided on the side. The side step portion SS may have a shape that protrudes from the connection insulation material 32a toward the primary insulation material 32.

The height of the side step (SS) may be lower than the thickness of the connection insulator (32a). The side step (SS) can narrow the gap between the primary insulation wall 3 and the connecting insulation wall 3a, thereby reducing the path of the thermal convection phenomenon.

At least one heat convection prevention member TCP5 may be provided in the gap between the primary insulation wall 3 and the connection insulation wall 3a.

The thermal convection prevention member TCP5 may have a shape in which the center is bent downward, that is, in the direction of the secondary barrier. That is, the height of the center of the thermal convection prevention member (TCP5) may be lower than both ends.

The thermal convection prevention member (TCP5) may include glass cloth. Glass cloth is a fabric material woven using glass fibers and can have high insulation properties.

The thermal convection prevention member TCP5 may be provided on the side step SS in the gap between the primary insulation wall 3 and the connection insulation material 32a, and may have a bent shape.

The thermal convection prevention member TCP5 as described above can block the path of thermal convection phenomenon caused by the upper and lower temperature difference inside the gap formed between the primary insulation wall 3 and the connecting insulation wall 3a.

The secondary insulation wall 5 may be installed between the secondary barrier 4 and the hull 7, and may include a secondary insulation material 51 and secondary plywood 52.

Below, a method of manufacturing a liquefied gas storage tank according to another embodiment of the present invention will be described with reference to FIGS. 15 to 17.

First, a unit insulation structure including the secondary insulation wall 5, the main barrier 41, and the primary insulation wall 3 is prepared, and a plurality of unit insulation structures are installed on the inner surface of the hull 7.

After installing a plurality of unit insulation structures, the secondary barrier 4 can be manufactured by installing an auxiliary barrier 42 that covers the gap between the secondary insulation walls 5 that are adjacent to each other.

After installing the auxiliary barrier 42, a connecting insulation wall 3a that can be installed in the space between adjacent primary insulation walls 3 is prepared.

A connection insulation wall (3a) provided with a side step (SS) on the side of the connection insulation material (32a) is inserted into the space between the adjacent primary insulation walls (3) and installed on the auxiliary barrier (42).

After inserting the connection insulation wall 3a into the space between the adjacent primary insulation walls 3, a heat convection prevention member TCP5 including a glass cloth is prepared. Here, the thermal convection prevention member TCP5 may be provided to correspond to the gap between the primary insulation wall 3 and the connecting insulation wall 3a.

Then, the thermal convection prevention member (TCP5) can be inserted into the gap between the primary insulation wall (3) and the connecting insulation wall (3a) using an insertion device (ID) such as a wedge. Accordingly, the thermal convection prevention member TCP5 may be provided on the side step portion SS.

Therefore, the thermal convection prevention member TCP5 can block the path of thermal convection phenomenon by shielding the gap between the primary insulation wall 3 and the connecting insulation wall 3a.

After inserting the thermal convection prevention member (TCP5), as shown in FIG. 15, the primary barrier (2) is installed on the first insulation wall (3) and the connecting insulation wall (3a), A liquefied gas storage tank according to an embodiment of the invention can be manufactured.

The present invention is not limited to the embodiments described above, and may include a combination of at least two or more of the above embodiments or a combination of at least one of the above embodiments and known techniques as a new embodiment. Of course.

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: Primary barrier
2a: unit barrier 21: flat part
22: curved part 23: boundary part
3: Primary insulation wall 3b: Fixed insulation wall
31: Primary plywood 32: Primary insulation material
3a: Connection insulation wall 31a: Connection plywood
32a: Connection insulation GP: Groove part
4: Secondary barrier 41: Main barrier
42: Auxiliary barrier 5: Secondary insulation wall
51: Secondary insulation 52: Secondary plywood
6: Mastic 7: Hull
TCP1, TCP2, TCP3, TCP4, TCP5: Absence of thermal convection prevention
ID: insertion device

Claims (6)

A primary barrier made of metal forming a receiving space for containing cryogenic substances;
A primary insulation wall provided outside the primary barrier;
A connecting insulation wall provided in the space between neighboring primary insulation walls;
a heat convection prevention member provided in a gap between the primary insulation wall and the connecting insulation wall;
a secondary barrier provided outside the primary insulation wall; and
It includes a secondary insulation wall provided outside the secondary barrier,
The thermal convection prevention member is
a first heat convection prevention unit attached to a side of the connection insulation wall; and
A liquefied gas storage tank including a second thermal convection prevention unit having a shape in which one end of the first thermal convection prevention member is bent and extended to the primary insulation wall. According to claim 1,
The connection insulation wall is
Connecting plywood provided on the outside of the primary barrier; and
It includes a connection insulation material provided on the outside of the connection plywood,
The first thermal convection prevention unit is a liquefied gas storage tank attached to a side of the connection insulation material. According to clause 2,
A liquefied gas storage tank in which the length of the second thermal convection prevention portion is greater than or equal to the width of the gap between the primary insulation wall and the connecting insulation wall. According to clause 3,
A liquefied gas storage tank in which the height of the other end of the second thermal convection prevention unit is greater than the height of one end of the second thermal convection prevention unit. According to clause 4,
The thermal convection prevention member is a liquefied gas storage tank containing glass cloth. A vessel comprising the liquefied gas storage tank of any one of claims 1 to 5.

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