Liquefied gas storage tank

Abstract

A liquefied gas storage tank of the present invention stores liquefied gas, and comprises: a barrier that is in contact with liquefied gas, and forms a storage space for accommodating the liquefied gas; and a plurality of heat-insulating walls that are installed on a support structure and are provided on the exterior of the barrier. The liquefied gas storage tank comprises: a plurality of bonding strips provided along a first direction on the outer surface fixed to the support structure, on each of the plurality of heat-insulating walls; and a plurality of sealing strips provided along a second direction different from the first direction.

Description

Liquefied gas storage tank

[0001] The present invention relates to a liquefied gas storage tank.

[0002] Generally, land-based liquefied gas storage tanks are used to store various liquefied gases, including liquefied natural gas (LNG), liquefied petroleum gas (LPG), liquefied oxygen, and liquefied nitrogen.

[0003] The exterior of a conventional land-based liquefied gas storage tank is created by pouring concrete on a foundation to form a cylindrical tank body with a roughly dome-shaped cover.

[0004] According to a conventional land-based liquefied gas storage tank, a vapor barrier is installed inside a tank body (i.e., an outer tank) made of concrete, and an inner tank that directly receives liquefied gas is installed inside the vapor barrier.

[0005] Since the inner part is in direct contact with the liquefied gas at an extremely low temperature, it can be made of materials such as low-temperature steel that can withstand extremely low temperatures, and the vapor barrier can be made of materials such as general carbon steel.

[0006] The inner wall may be formed by installing a plurality of insulation panels on the inner surface and the bottom of the outer wall, and a barrier formed by installing a plurality of corrugation membrane sheets on the insulation wall. The inner wall includes a vertical portion and a bottom portion.

[0007] However, in manufacturing the inner part, there is no difficulty in installing multiple insulation panels and multiple corrugation membrane sheets along the inner surface of the outer part in the case of the vertical part, but in the case of the bottom part, it must be manufactured in a circular shape to connect with the lower part of the cylindrical vertical part, so regular insulation panels and regular corrugation membrane sheets cannot be used in the peripheral part that comes into contact with the vertical part depending on the arrangement of the insulation panels and corrugation membrane sheets, which increases the manufacturing cost and has the problem of difficulty in maintenance.

[0008] Meanwhile, land-based liquefied gas storage tanks may be provided with side openings that serve as passageways for bringing in or taking out internal and external work materials and equipment and for workers to pass through.

[0009] Conventional land-based liquefied gas storage tanks have side openings that are spaced a considerable distance upward from the corner structure where the vertical portion and the bottom of the inner tank meet, requiring additional installation of a vapor barrier between the corner structure and the side opening, which increases process and manufacturing costs. In addition, the tanks are located far from the foundation or bottom, making it difficult to transport materials and equipment and move workers.

[0010] In addition, conventional land-based liquefied gas storage tanks have a problem in that the side opening is formed on a single surface of the wall forming the receiving space, which limits the size of the side opening.

[0011] The present invention was created to solve the problems of the prior art as described above, and the purpose of the present invention is to provide a liquefied gas storage tank that can be easily manufactured on land, reduce manufacturing costs, and improve maintenance.

[0012] A liquefied gas storage tank according to one aspect of the present invention comprises: a barrier that comes into contact with liquefied gas and forms a storage space for receiving liquefied gas; a plurality of insulating walls installed on a support structure and provided on the outer side of the barrier; and a storage tank for storing liquefied gas, the storage tank comprising: a plurality of bonding strips provided along a first direction on an outer surface of each of the plurality of insulating walls that is fixed to the support structure; and a plurality of sealing strips provided along a second direction different from the first direction.

[0013] The plurality of sealing strips may include a first sealing strip provided along the second direction in each of the plurality of insulating walls; and a second sealing strip provided along the second direction between a pair of insulating walls that are adjacent to each other among the plurality of insulating walls.

[0014] The plurality of sealing strips can block heat convection generated through the space between the plurality of bonding strips and the space between the plurality of insulating walls.

[0015] A liquefied gas storage tank according to one aspect of the present invention comprises: a primary barrier that comes into contact with liquefied gas and forms a storage space for the liquefied gas; at least one insulating wall installed on a support structure and provided on the outside of the primary barrier; a secondary barrier installed between the insulating walls and provided at a predetermined height from the bottom of the storage space; and a lower barrier finishing part that secures the secondary barrier to the support structure, wherein the lower barrier finishing part comprises: an embedded plate installed along an inner circumferential surface of the support structure at the predetermined height from the bottom of the storage tank; and a protruding plate protruding inward from the embedded plate.

[0016] Specifically, it may include a step buffer means for alleviating the internal and external step difference between the protruding plate and the secondary barrier; and a sealing plate having a bent shape and contacting the outer surface of the step buffer means and sealingly connecting the protruding plate and the secondary barrier.

[0017] Specifically, the step buffer means may be composed of an upper horizontal plate, a vertical plate connected to the upper horizontal plate, and a lower horizontal plate connected to the vertical plate and parallel to the upper horizontal plate.

[0018] Specifically, the sealing plate may have a horizontal upper portion bonded to the upper horizontal plate of the step buffer means by an adhesive, and a vertical lower portion bonded to the secondary barrier by an adhesive.

[0019] Specifically, the lower barrier finish may include a sealing plate having a bent shape and sealingly connecting between the protruding plate and the secondary barrier; and a block member provided between the lower surface of the sealing plate and the upper surface of the insulating wall.

[0020] Specifically, the sealing plate may have a horizontal upper portion bonded to the upper surface of the protruding plate by an adhesive, and a vertical lower portion bonded to the secondary barrier by an adhesive.

[0021] A liquefied gas storage tank according to one aspect of the present invention comprises a primary barrier that comes into contact with liquefied gas and forms a storage space for the liquefied gas; an insulating wall that is installed on a support structure and is provided on the outside of the primary barrier; and a storage tank that stores liquefied gas, the storage tank comprising an upper barrier finish portion that fixes the primary barrier to the support structure, the upper barrier finish portion comprising an embedded plate that is installed along an inner circumferential surface of the support structure at an upper portion of the support structure; a protruding plate that protrudes inward from the built-in plate; and a sealing plate that has a bent shape and sealingly connects between the protruding plate and the primary barrier.

[0022] Specifically, the upper barrier wall finishing part may further include a closing block provided between the insulating wall and the protruding plate and between the insulating wall and the sealing plate.

[0023] Specifically, the upper wall finishing portion may further include a panel joint inserted and installed in a tolerance zone generated between the insulating wall and the closing block.

[0024] A liquefied gas storage tank according to one aspect of the present invention comprises: a wall for storing liquefied gas and forming a receiving space having a polygonal cross-section; and a side opening formed in the wall; wherein the side opening can be formed across a first surface of the wall and a first-first surface bent and connected to the first surface.

[0025] Specifically, it may include a barrier provided on the inside of the wall; and a temporary barrier provided at the end of the barrier facing the side opening.

[0026] Specifically, a gap is formed between the temporary barriers provided on the first side and the first-first side, respectively, and a cover member covering at least a portion of the gap may be included.

[0027] A liquefied gas storage tank according to one embodiment of the present invention can be manufactured easily by improving the structure of the insulation wall and the barrier wall at least in the bottom portion, and can obtain effects such as reduced manufacturing cost and improved maintenance.

[0028] FIG. 1 is a drawing for explaining a liquefied gas storage tank according to a first embodiment of the present invention.

[0029] Figure 2 is a cross-sectional view illustrating the bottom of a liquefied gas storage tank according to the first embodiment of the present invention.

[0030] Figure 3 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the first embodiment of the present invention.

[0031] Figure 4 is a partial plan view illustrating the bottom of a liquefied gas storage tank according to the first embodiment of the present invention.

[0032] FIG. 5 is a partial plan view illustrating a plurality of unit elements provided at the bottom of a liquefied gas storage tank according to the first embodiment of the present invention.

[0033] Figure 6 is a partial plan view illustrating the bottom of a liquefied gas storage tank according to the second embodiment of the present invention.

[0034] FIG. 7 is a partial plan view illustrating an insulating wall and a barrier provided at the bottom of a liquefied gas storage tank according to a second embodiment of the present invention.

[0035] FIG. 8 is a drawing for explaining a vertical portion of a liquefied gas storage tank according to a third embodiment of the present invention.

[0036] FIG. 9 and FIG. 10 are drawings for explaining the vertical portion of a liquefied gas storage tank according to the fourth embodiment of the present invention.

[0037] Figure 11 is a drawing for explaining a heat convection problem occurring in the vertical section of a conventional liquefied gas storage tank.

[0038] Fig. 12 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the fifth embodiment of the present invention.

[0039] Fig. 13 is a partial cross-sectional view for explaining the manufacturing process of a connecting insulation material in a liquefied gas storage tank according to the fifth embodiment of the present invention.

[0040] Fig. 14 is a drawing showing a cross-section along S2 in the vertical section of the liquefied gas storage tank according to Fig. 12.

[0041] Fig. 15 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the sixth embodiment of the present invention.

[0042] Fig. 16 is a drawing showing a cross-section along S3 in the vertical section of the liquefied gas storage tank according to Fig. 15.

[0043] Fig. 17 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the seventh embodiment of the present invention.

[0044] Fig. 18 is a drawing showing a cross-section along S4 in a vertical section of a liquefied gas storage tank according to Fig. 17.

[0045] Fig. 19 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the eighth embodiment of the present invention.

[0046] Fig. 20 is an enlarged drawing showing a part of the structure of the liquefied gas storage tank according to Fig. 19.

[0047] Fig. 21 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the ninth embodiment of the present invention.

[0048] Fig. 22 is a drawing for explaining the vertical portion of the liquefied gas storage tank according to Fig. 21.

[0049] Figures 23 to 25 are cross-sectional views illustrating the manufacturing process of a liquefied gas storage tank according to Figure 21.

[0050] Fig. 26 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the 10th embodiment of the present invention.

[0051] Figure 27 is a graph for explaining the effect of the liquefied gas storage tank according to Figure 26.

[0052] Figure 28 is a cross-sectional view illustrating a vulnerable structure occurring in a vertical section of a liquefied gas storage tank.

[0053] Fig. 29 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the 11th embodiment of the present invention.

[0054] Fig. 30 is a rear view of an insulating wall for explaining a vertical portion of a liquefied gas storage tank according to the 12th embodiment of the present invention.

[0055] Figures 31 (a) and (b) are cross-sectional views for explaining the vertical portion of a liquefied gas storage tank according to the 13th embodiment of the present invention.

[0056] Figure 32 is a partial perspective view for explaining the lower wall finishing part of a liquefied gas storage tank according to the 14th embodiment of the present invention.

[0057] FIG. 33 is an enlarged view of part A of FIG. 32 to explain the lower wall finishing part of a liquefied gas storage tank according to the 14th embodiment of the present invention.

[0058] Figures 34 (a) to (c) are drawings for explaining the installation process of the lower barrier finishing part in the liquefied gas storage tank according to the 14th embodiment of the present invention.

[0059] Figure 35 is a cross-sectional view for explaining the lower wall finishing part of a liquefied gas storage tank according to the 15th embodiment of the present invention.

[0060] Fig. 36 is a cross-sectional view for explaining the upper wall finishing part of a liquefied gas storage tank according to the 16th embodiment of the present invention.

[0061] Figure 37 is a partially exploded perspective view of the corner structure of a liquefied gas storage tank according to the 17th embodiment of the present invention.

[0062] Fig. 38 is a front view of the corner structure of a liquefied gas storage tank according to the 17th embodiment of the present invention.

[0063] Fig. 39 is a cross-sectional view of a corner structure of a liquefied gas storage tank according to the 17th embodiment of the present invention.

[0064] FIG. 40 is a partial perspective view illustrating a side opening formed in a liquefied gas storage tank according to the 19th embodiment of the present invention.

[0065] FIG. 41 is a partial perspective view illustrating a sealing plate connected to a side opening formed in a liquefied gas storage tank according to the 19th embodiment of the present invention.

[0066] FIG. 42 is a partial perspective view illustrating that a side opening formed in a liquefied gas storage tank according to the 19th embodiment of the present invention is covered.

[0067] FIG. 43 is a partial perspective view illustrating a sealing plate connected to a side opening formed in a liquefied gas storage tank according to the 20th embodiment of the present invention.

[0068] FIG. 44 is a partial perspective view illustrating a sealing plate connected to a primary barrier in a side opening formed in a liquefied gas storage tank according to the 20th embodiment of the present invention.

[0069] FIG. 45 is a partial perspective view illustrating that a side opening formed in a liquefied gas storage tank according to the 20th embodiment of the present invention is covered.

[0070] FIG. 46 is a partial perspective view illustrating a side opening formed in a liquefied gas storage tank according to the 21st embodiment of the present invention.

[0071] FIG. 47 is a drawing for explaining a process of covering an outer gap adjacent to a side opening formed in a liquefied gas storage tank according to the 21st embodiment of the present invention.

[0072] FIG. 48 is a drawing for explaining a process of covering an inner gap adjacent to a side opening formed in a liquefied gas storage tank according to the 21st embodiment of the present invention.

[0073] The 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 this specification, when assigning reference numbers to components in each drawing, it should be noted that, wherever possible, identical components are assigned the same reference numbers, even if they appear in different drawings.

[0074] Of course, even if they are identical components, they may be indicated by different numbers in different drawings or different embodiments. That is, even if reference numbers are the same, they may indicate different components, and conversely, even if reference numbers are different, they may indicate the same components.

[0075] In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description is omitted.

[0076] In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

[0077] Additionally, terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but do not limit the order, etc. That is, the above terms are used only for the purpose of distinguishing one component from another.

[0078] In the present specification, the liquefied gas may be LNG. The following description assumes that the liquefied gas is LNG. However, in the present invention, the liquefied gas may include, in addition to LNG, any substance (e.g., LPG, ethane, hydrogen, ammonia, etc.) that is forcibly liquefied for storage due to its boiling point being lower than room temperature and has a calorific value.

[0079] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0080]

[0081] FIG. 1 is a drawing for explaining a liquefied gas storage tank according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view for explaining a bottom portion of a liquefied gas storage tank according to a first embodiment of the present invention, FIG. 3 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to a first embodiment of the present invention, FIG. 4 is a partial plan view for explaining a bottom portion of a liquefied gas storage tank according to a first embodiment of the present invention, and FIG. 5 is a partial plan view for explaining a plurality of unit elements provided on a bottom portion of a liquefied gas storage tank according to a first embodiment of the present invention.

[0082] Referring to FIGS. 1 to 5, a liquefied gas storage tank (1) according to the first embodiment of the present invention is mounted at a point on land or the like. At this time, the liquefied gas storage tank (1) may be a membrane type in which a bulkhead structure of a structure installed on land forms the outer surface of the tank, or may be an independent type in which the liquefied gas storage tank (1) is installed on land.

[0083] The type of the liquefied gas storage tank (1) is not particularly limited, and the location where the liquefied gas storage tank (1) is installed (on land, on the deck of a marine structure, etc.) is also not limited. However, the liquefied gas storage tank (1) of the present invention may have a structure in which an insulating layer is arranged in an inward direction.

[0084] A liquefied gas storage tank (1) has a storage space. The storage space can store liquefied gas, which may be LNG. The following description assumes that the liquefied gas is LNG. However, in the present invention, the liquefied gas may include, in addition to LNG, any substance (such as LPG, ethane, hydrogen, or ammonia) that is forcibly liquefied for storage due to its boiling point being lower than room temperature and has a calorific value.

[0085]

[0086] In this embodiment, a case is described where the liquefied gas storage tank (1) is a land-based storage tank.

[0087] A liquefied gas storage tank (1) may include an outer tank (11) formed in a cylindrical shape and an inner tank (12) installed on the inner surface and bottom of the outer tank (11).

[0088] The outer tank (11) may be formed in a cylindrical shape. The outer tank (11) forms a cylindrical tank body having a roughly dome-shaped cover by pouring concrete or the like, thereby forming the outer shape of the liquefied gas storage tank (1).

[0089] Since the inner chamber (12) is a part that comes into direct contact with liquefied gas at extremely low temperatures, it can be made of a material such as low-temperature steel that can withstand extremely low temperatures.

[0090] This inner part (12) can be composed of a vertical part (121) installed on the inner surface of the outer part (11) and a bottom part (122) installed on the bottom surface of the outer part (11).

[0091] The vertical section (121) and the bottom section (122) may be formed of an insulating wall (3, 3a, 5) that can withstand impact from the outside or impact due to liquefied gas sloshing from the inside while blocking heat intrusion from the outside, and a barrier (2, 4) that can prevent liquefied gas from leaking to the outside, which will be described in detail below.

[0092] The vertical section (121) and the bottom section (122) may be configured to include a primary barrier (2) in contact with liquefied gas, a primary insulating wall (3) installed on the outside of the primary barrier (2), a secondary barrier (4) installed on the outside of the primary insulating wall (3), and a secondary insulating wall (5) arranged on the outside of the secondary barrier (4), as shown in FIGS. 2 and 3, and may be supported on the outer tank (11) by a mastic (6) as an adhesive member and a stud (7) as a fixing member installed between the secondary insulating wall (5) and the outer tank (11).

[0093] The vertical section (121) may be configured in the same manner as the floor section (122), but as shown in FIG. 1, the portion in contact with the floor section (122) may be configured in the same manner as the floor section (122) up to a certain height, and above a certain height, the secondary barrier (4) arranged between the primary insulation wall (3) and the secondary insulation wall (5) may be omitted.

[0094] That is, as illustrated in FIG. 3, the vertical portion (121) may be formed in a structure in which, from a certain height upward, the secondary plywood (52) of the secondary insulation wall (5), the primary insulation material (32) of the primary insulation wall (3) or the secondary insulation material (51) of the secondary insulation wall (5), the primary plywood (31) of the primary insulation wall (3), and the primary barrier wall (2) are laminated. In addition, the vertical portion (121) may omit the connecting insulation wall (3a) in the configuration of the floor portion (122) and connect neighboring unit insulation panels with panel joint members (drawing symbols not shown).

[0095] The inner tank (12) of the liquefied gas storage tank (1) may include a lower barrier finish that is installed at a vertical portion (121) at a certain height from the bottom portion (122) and that secures the secondary barrier (4) to the outer tank (11), and an upper barrier finish that is installed at the top of the vertical portion (121) and secures the primary barrier (2) to the outer tank (11). The lower barrier finish may be configured in various ways, such as the lower barrier finish (100) of the third embodiment to be described later or the lower barrier finish (200) of the fourth embodiment to be described later, and the upper barrier finish may be configured in various ways, such as the lower barrier finish (300) of the fifth embodiment to be described later.

[0096]

[0097] The primary barrier (2) forms a space for containing 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.

[0098] The primary barrier (2) can be installed so as to be fixedly connected to the upper part of the primary insulating wall (3) and come into direct contact with the liquefied gas, which is an extremely low-temperature substance stored in the liquefied gas storage tank (1).

[0099] The primary barrier (2) can be formed of a corrugated membrane sheet having lattice-shaped wrinkles.

[0100] The primary insulation wall (3) is designed to withstand impact from the outside or impact caused by liquefied gas sloshing from the inside while blocking heat intrusion from the outside, and can be installed between the primary barrier (2) and the secondary barrier (4).

[0101] The primary insulation wall (3) may have a structure in which the primary plywood (31) and the primary insulation material (32) are sequentially laminated on the outside of the primary barrier (2).

[0102] The primary plywood (31) can be installed between the primary barrier (2) and the primary insulation (32).

[0103] The primary insulation material (32) can be formed of a material with excellent insulation performance and mechanical strength, such as polyurethane foam, so as to withstand impact from the outside or impact caused by liquefied gas sloshing from the inside while blocking heat intrusion from the outside.

[0104] A portion of the primary insulation wall (3), the secondary barrier (4), and the secondary insulation wall (5) can be laminated to form a unit insulation panel (53a, 53b). The unit insulation panels (53a, 53b) can be divided into a regular insulation panel (53a) having a rectangular parallelepiped shape, and an irregular insulation panel (53b) having a triangular or trapezoidal plane shape and being smaller than the regular insulation panel (53a).

[0105] In the unit insulation panels (53a, 53b), the width of the primary insulation wall (3) may be smaller than the width of the secondary insulation wall (5), and thus, a portion of the secondary barrier wall (4) may be exposed on both sides of the primary insulation wall (3). The unit insulation panels (53a, 53b) may be arranged adjacently, and at this time, a connecting insulation wall (3a) may be installed in the space between the adjacent primary insulation walls (3), i.e., the space where the secondary barrier wall (4) is exposed.

[0106] The secondary barrier wall (4) can be divided into a main barrier wall (41) and an auxiliary barrier wall (42). The main barrier wall (41) is installed on the upper part of the secondary insulation wall (5) in the unit insulation panels (53a, 53b), and the auxiliary barrier wall (42) is installed between the exposed main barrier wall (41) and the connecting insulation wall (3a). At this time, the auxiliary barrier wall (42) is provided to interconnect the main barrier walls (41) provided in the adjacent unit insulation panels (53a, 53b). That is, the adjacent unit insulation panels (53a, 53b) can be finished by the auxiliary barrier (42) and the connecting insulation wall (3a) laminated on the main barrier wall (41).

[0107] The connecting insulation wall (3a) can be provided in a laminated form with connecting plywood (31a) and connecting insulation material (32a).

[0108] The connecting plywood (31a) can be installed between the primary barrier (2) and the connecting insulation (32a).

[0109] The connecting insulation (32a) can be formed of polyurethane foam between the connecting plywood (31a) and the auxiliary barrier (42) of the secondary barrier (4).

[0110] The above-mentioned connecting insulation wall (3a) is installed to block heat intrusion from the outside by sealing the space created between the adjacent secondary insulation walls (5) together with the auxiliary barrier (42) when the unit insulation panels (53a, 53b) are arranged adjacently. This connecting insulation wall (3a) is manufactured in the form of a panel, i.e., a connecting insulation panel (3ab), and can be inserted and installed between the adjacent primary insulation walls (3).

[0111] The secondary barrier (4) can be installed between the primary insulation wall (3) and the secondary insulation wall (5) that encompass the connecting insulation wall (3a), and together with the primary barrier (2), can prevent liquefied gas from leaking to the outside.

[0112] The secondary barrier (4) at the bottom of the unit insulation panel (53a, 53b) may include a main barrier (41) as a single barrier, and the secondary barrier (4) at the bottom of the connecting insulation wall (3a) may include a main barrier (41) connecting the unit insulation panels (53a, 53b) to each other, and an auxiliary barrier (42) provided on the secondary insulation wall (5) forming the unit insulation panel (53a, 53b).

[0113] The secondary insulation wall (5) can be designed to withstand impact from the outside or impact due to liquefied gas sloshing from the inside while blocking heat intrusion from the outside together with the primary insulation wall (3) and the connecting insulation wall (3a).

[0114] The secondary insulation wall (5) can be installed between the secondary barrier (4) and the outer shell (11), and can have a structure in which the secondary insulation material (51) and the secondary plywood (52) are sequentially laminated on the outside of the secondary barrier (4).

[0115] The secondary insulation material (51) can be formed of a material with excellent insulation performance and mechanical strength, such as polyurethane foam, so as to withstand impact from the outside or impact caused by liquefied gas sloshing from the inside while blocking heat intrusion from the outside.

[0116] The secondary plywood (52) can be installed between the secondary insulation (51) and the outer shell (11).

[0117]

[0118] The inner tank (12) of the land-based liquefied gas storage tank (1) according to the first embodiment of the present invention is positioned along the inner circumference of the outer tank (11), forms a sealed storage space, and may be formed in a polygonal shape. That is, the land-based liquefied gas storage tank (1) may have a vertical portion (121) of the inner tank (12) that forms a polygon. In this case, the bottom portion (122) may be formed in a shape corresponding to the polygon of the vertical portion (121) with a rim and may be connected to the lower end of the vertical portion (121).

[0119] In this embodiment, the primary barrier (2) can be divided into a regular barrier (2) and an irregular barrier (2). The regular barrier (2) may have a rectangular planar shape, and the irregular barrier (2) is connected to the regular barrier (2) and may have a triangular or trapezoidal planar shape.

[0120] This primary barrier (2) is provided with lattice-shaped wrinkles, and the pitch between wrinkles can be several hundred mm. The lattice-shaped wrinkles can be divided into horizontal wrinkles (21), vertical wrinkles (22), vertical wrinkles (23), and horizontal wrinkles (24). The horizontal wrinkles (21) and vertical wrinkles (22) are wrinkles provided on the primary barrier (2) of the bottom portion (122), and the vertical wrinkles (23) and horizontal wrinkles (24) are wrinkles provided on the primary barrier (2) of the vertical portion (121).

[0121] However, the horizontal wrinkles (21) of the bottom portion (122) may be formed in a circular or polygonal shape based on the center of the bottom portion (122), and the vertical wrinkles (22) of the bottom portion (122) may be formed in a shape that extends radially from the center of the bottom portion (122). That is, the horizontal wrinkles (21) and the vertical wrinkles (22) of the bottom portion (122) may form a spider web shape, and the horizontal and vertical lines may not necessarily intersect at right angles.

[0122] In addition, unit insulation panels (53a, 53b) are formed by the primary insulation wall (3) and the secondary insulation wall (5), and these unit insulation panels (53a, 53b) can be provided to correspond to the shape of the regular barrier (2) or the irregular barrier (2) of the primary barrier (2). That is, when the regular barrier (2) is applied as the primary barrier (2), the regular insulation panel (53a) can be provided to correspond thereto, and when the irregular barrier (2) is applied as the primary barrier (2), the irregular insulation panel (53b) can be provided to correspond thereto. In this embodiment, it is described that the shapes of the unit insulation panels (53a, 53b) and the primary barrier (2) correspond to each other, but it is not limited thereto.

[0123] Additionally, in the present embodiment, the regular insulation panel (53a) may have a rectangular planar shape and may include two types of first regular insulation panels (53a1) and second regular insulation panels (53a2) having different sizes. The first regular insulation panel (53a1) may be larger than the second regular insulation panel (53a2).

[0124] The irregular insulation panel (53b) has a planar shape of a triangle or trapezoid of various sizes, and may include two types of first irregular insulation panels (53b1) and second irregular insulation panels (53b2) of different sizes. The first irregular insulation panel (53b1) is larger than the second irregular insulation panel (53b2). In addition, the first irregular insulation panel (53b1) and the second irregular insulation panel (53b2) may be smaller than the regular insulation panel (53a).

[0125]

[0126] The bottom part (122) of the present embodiment has a plurality of unit elements (UE) in the shape of isosceles triangles that are radially divided based on the center of the bottom part (122), as illustrated in FIG. 4 and the like. The unit elements (UE) may be virtual and may not have a structurally formed configuration.

[0127] Referring to FIGS. 4 and 5, the bottom portion (122) may be installed with a plurality of regular insulation panels (53a) and a plurality of irregular insulation panels (53b) on the bottom surface of the outer shell (11). In the unit element (UE), the plurality of regular insulation panels (53a) and the plurality of irregular insulation panels (53b) may be arranged radially from the vertex of the unit element (UE) corresponding to the center of the bottom portion (122) in the direction of the outer edge (C) opposite to the vertex.

[0128] Since the unit element (UE) has the shape of an isosceles triangle, it has a vertex angle (θ) at the vertex, and the number of polygons can vary depending on the size of the vertex angle (θ).

[0129] The bottom portion (122) may be formed with a polygonal border and may be connected to the lower end of the vertical portion (121). The bottom portion (122) may be formed with a polygon corresponding to the number of unit elements (UE).

[0130] In this embodiment, the outer side (C) of the unit element (UE) can be formed to have a first outer side (C1) on the left, a second outer side (C2) in the center, and a third outer side (C3) on the right, which are folded into three parts by dividing the outer side (C) of the unit element (UE) into three parts. That is, the number of angles in the bottom part (122) can be three times greater than the number of angles based on the outer side (C) when the unit element (UE) is divided into three parts. For example, when there are 16 unit elements (UE), the bottom part (122) is formed as a 16-gon before the outer side (C) of each unit element (UE) is divided into three parts, but when the outer side (C) of each unit element (UE) is divided into three parts, the bottom part (122) can be formed as a 48-gon.

[0131] At this time, the vertical portion (121) can be formed to have a polygon (e.g., a 48-gon) that is three times the number of polygons (e.g., a 16-gon) corresponding to the number of unit elements (UE) corresponding to the outer side (C) of the bottom portion (122) being folded into three parts.

[0132] When the outer edge (C) of the unit element (UE) is formed by the first outer edge (C1) on the left, the second outer edge (C2) in the center, and the third outer edge (C3) on the right, in the area corresponding to the second outer edge (C2) in the center, regular insulation panels (53a) can be arranged in most areas as well as in the area adjacent to the vertical section (121), thereby reducing the number of irregular insulation panels (53b) to be arranged, and in the areas corresponding to the first outer edge (C1) on the left and the third outer edge (C3) on the right, regular insulation panels (53a) and irregular insulation panels (53b) can be arranged symmetrically, thereby increasing the efficiency of the arrangement work.

[0133] Additionally, irregular insulation panels (53b) in the shape of a triangle or diamond can be installed at the point where neighboring unit elements (UE) come into contact.

[0134] The floor (122) may have a plurality of regular barriers (2) installed on a plurality of regular insulation panels (53a), and a plurality of irregular barriers (2) installed on a plurality of irregular insulation panels (53b). In a unit element (UE), the plurality of regular barriers (2) and the plurality of irregular barriers (2) may be arranged radially from a vertex of the unit element (UE) corresponding to the center of the floor (122) in the direction of the outer edge (C) opposite to the vertex. In a portion where neighboring unit elements (UE) contact, a triangular or diamond-shaped irregular barrier (2) may be installed.

[0135] As described above, in this embodiment, the bottom part (122) has a plurality of unit elements (UE) in the form of isosceles triangles that are radially divided based on the center of the bottom part (122), and a plurality of regular insulation panels (53a), a plurality of irregular insulation panels (53b), and a plurality of connection insulation panels (3ab) can be installed on the bottom surface of the outer shell (11) in each unit element (UE).

[0136]

[0137] FIG. 6 is a partial plan view for explaining the bottom of a liquefied gas storage tank according to a second embodiment of the present invention, and FIG. 7 is a partial plan view for explaining an insulating wall and a barrier provided on the bottom of a liquefied gas storage tank according to a second embodiment of the present invention.

[0138] Below, the differences between this embodiment and the previous embodiment will be primarily explained, and any omitted portions will be replaced with the previous content. This applies to all embodiments of this specification.

[0139] Referring to FIGS. 6 and 7, a liquefied gas storage tank (1) according to a second embodiment of the present invention may have a vertical portion (121) formed in a polygonal shape, and vertical corrugations (23) of a primary barrier (2) may be provided with the same regular pitch in the circumferential direction. In addition, a bottom portion (122) is formed in a square shape corresponding to a polygonal edge and is connected to the lower end of the vertical portion (121).

[0140] The floor (122) can be divided into a first region (122a) in which regular insulation walls (not shown) and regular barrier walls (2a) are arranged, and a second region (122b) in which irregular insulation walls (not shown) and irregular barrier walls (2b) are arranged between the first region (122a) and the vertical portion (121).

[0141] The horizontal wrinkles (21) of the bottom portion (122) are wrinkles that extend in the horizontal direction based on the drawing, and the vertical wrinkles (22) of the bottom portion (122) are wrinkles that extend in the vertical direction based on the drawing. In other words, the horizontal wrinkles (21) and the vertical wrinkles (22) of the bottom portion (122) can form a grid-like shape, and the horizontal and vertical can intersect at right angles.

[0142]

[0143] In addition, a unit insulation panel is formed by a primary insulation wall (3) and a secondary insulation wall (5), and such a unit insulation panel is provided to correspond to the shape of the primary barrier (2). That is, when a regular barrier (2a) is applied as the primary barrier (2), a regular insulation wall can be provided to correspond thereto, and when an irregular barrier (2b) is applied as the primary barrier (2), an irregular insulation wall can be provided to correspond thereto.

[0144] The regular barrier (2a) may be a standardized rectangular shape. The regular barrier (2a) may be installed in the vertical section (121) and may be installed in a orthogonal arrangement in the first area (122a) of the floor section (122). That is, the regular barrier (2a) may be installed in the vertical section (121) and the first area (122a) of the floor section (122), and a regular insulating wall may be installed below the regular barrier (2a) to correspond thereto.

[0145] The irregular barrier (2b) may have various forms manufactured separately from the regular barrier (2a). The irregular barrier (2b) may be arranged and installed in the second region (122b) of the floor (122). Here, the second region (122b) may be an region where the irregular insulating wall and the irregular barrier (2b) are arranged between the first region (122a) and the vertical region (121).

[0146] In this embodiment, the regular insulating wall formed to correspond to the regular barrier (2a) has a rectangular cross-section shape, as shown in Fig. 7, and is arranged orthogonally in the first region (122a), but can be arranged in a horizontally laid form.

[0147] With the regular insulation walls arranged as described above, irregular insulation walls can be arranged in the second region (122b) to correspond to the irregular barrier (2b). As illustrated in Fig. 7, the arrangement of the irregular insulation walls can be varied.

[0148] At least the second region (122b) of the bottom portion (122) may have a different finishing member (25) placed between the bottom portion (122) and the vertical portion (121) depending on the gap between the end of the vertical wrinkle (23) of the vertical portion (121) and the end of the vertical wrinkle (22) of the bottom portion (122) or the gap between the end of the vertical wrinkle (23) of the vertical portion (121) and the end of the horizontal wrinkle (21) of the bottom portion (122).

[0149] The finishing member (25) may be a continuous folded member that finishes a portion where the pleats are connected to each other because there is no gap, or an independent finishing cover, an overlapping finishing cover, or a continuous flat member that finishes a portion where the pleats are not connected to each other because there is a gap.

[0150] The finishing member (25) selects an independent finishing cover, an overlapping finishing cover, and a continuous flat member according to the size of the gap to finish the part where the wrinkles are not connected to each other. If the size of the gap is equal to or greater than a set first interval, an independent finishing cover is applied. If the size of the gap is equal to or less than a set second interval that is narrower than the first interval, a continuous flat member is applied. If the size of the gap is between the first interval and the second interval, an overlapping finishing cover can be applied.

[0151] The support structure (300) described through the drawings of FIGS. 8 to 29 described below may have a configuration corresponding to the outer shell (11) described in FIGS. 1 to 3.

[0152]

[0153] FIG. 8 is a drawing for explaining a vertical portion of a liquefied gas storage tank according to a third embodiment of the present invention, and FIGS. 9 and 10 are drawings for explaining a vertical portion of a liquefied gas storage tank according to a fourth embodiment of the present invention.

[0154] Referring to FIGS. 4 and 5, the bottom portion (122) can be formed as a polygon corresponding to the number of unit elements (UE), and the bottom portion (122) can be connected to the lower end of the vertical portion (121).

[0155] That is, the bottom portion (122) may be formed into a polygon and include a folded portion, and at this time, the vertical portion (121) may be formed to have an angle corresponding to the folded portion of the bottom portion (122).

[0156] Figures 8 to 10 illustrate cross-sections of a vertical portion viewed from above, in which the vertical portion (121) has a polygonal shape corresponding to the bottom portion (122), and illustrates cross-sections of a portion of the vertical portion (121) including an angle.

[0157] The vertical portion (121) of the liquefied gas storage tank (1) has a structure that is identical to the bottom portion (122) up to a certain height (e.g., 5 m) from the portion in contact with the bottom portion (122) (see Fig. 1).

[0158] Figures 8 to 10 correspond to the above structure and may have the same structure as in Figure 2, but some of the components forming the vertical portion (121) are omitted.

[0159] Specifically, in FIGS. 8 to 10, a barrier wall (100) forming a space for containing liquefied gas, which is a cryogenic substance, a primary insulating wall (3) provided to be in contact with the barrier wall (100), a secondary insulating wall (5) provided on the outside of the primary insulating wall (3), and a support structure (300) connected to the secondary insulating wall (5) with mastic (6) are illustrated. In addition, the configurations such as plywood illustrated in FIGS. 1 and 2 are omitted from the illustration. Although omitted, it is to be understood that the above configurations may be included in each location.

[0160]

[0161] According to the third embodiment illustrated in FIG. 8, the liquefied gas storage tank (1) may be formed of a corner panel (102) having an angle at the corner of the vertical portion (121) and a flat panel (104) having a flat shape and arranged on both sides of the corner panel (102).

[0162] A liquefied gas storage tank (1) may include a barrier wall (100) that forms a storage space for storing liquefied gas, and a plurality of insulating walls (3, 5) that are installed on a support structure (300) and provided on the outside of the barrier wall (100).

[0163] The plurality of insulating walls (3, 5) may include a primary insulating wall (3) in contact with the barrier wall (100) and a secondary insulating wall (5) arranged between the primary insulating wall (3) and the support structure (300). The panel is composed of the primary insulating wall (3) and the secondary insulating wall (5), and may include a corner panel (102) and a flat panel (104).

[0164] A barrier wall (100) may be provided on the inside of the primary insulating wall (3), and a fixed barrier wall (120) may be further provided on the inside of the barrier wall (100). At this time, the fixed barrier wall (120) may be a structure that is fixed to the barrier wall (100) using a fixing member (108).

[0165] Although not shown, when corner panels (102) and flat panels (104) are arranged to form a vertical section (121), it goes without saying that a primary insulation wall (3) must also be arranged in the space formed between the primary insulation walls (3) arranged in each panel (102, 104).

[0166] In the case of the third embodiment, the corner panel (102) and the flat panel (104) must be manufactured separately, and after each panel (102, 104) is placed, an additional primary insulation wall (3) must be placed in the spaced space, so the construction work is not easy.

[0167] In addition, as shown, a heat path (106) is created between the secondary insulation walls (5) forming each panel (102, 104), and since a heat path (106) is created between each secondary insulation wall (5), there is a problem in that a lot of heat convection occurs along a large number of heat paths (106).

[0168]

[0169] Figures 9 and 10 are drawings illustrating a fourth embodiment. According to the fourth embodiment, the vertical portion (121) of the liquefied gas storage tank (1) may be formed of a flat panel (104).

[0170] Fig. 9 illustrates the state before the connecting insulation wall (3a) is inserted, and Fig. 10 illustrates the state in which the connecting insulation wall (3a) is inserted between the primary insulation walls (3). The fourth embodiment aims to improve the problems in the third embodiment.

[0171] A liquefied gas storage tank (1) according to the fourth embodiment may include a barrier wall (100) forming a storage space for storing liquefied gas, and a plurality of insulating walls (3, 5, 3a) installed on a support structure (300) and provided on the outside of the barrier wall (100).

[0172] The insulating wall (3, 5, 3a) may include a primary insulating wall (3) in contact with the barrier wall (100), and a secondary insulating wall (5) disposed between the primary insulating wall (3) and the support structure (300).

[0173] A gap (114) may be provided between the primary insulation wall (3) arranged parallel to the first side and the primary insulation wall (3) arranged parallel to the second side.

[0174] The support structure (300) may include a first side and a second side that is folded and connected to the first side, and the insulating wall (3, 5, 3a) may further include a connecting insulating wall (3a) provided between the first insulating wall (3) of the first side and the first insulating wall (3) of the second side.

[0175] A connecting insulating wall (3a) may be placed in the separation portion (114). The connecting insulating wall (3a) may be provided so that the outer surface facing the support structure (300) is bent due to an angle formed by the angle of the vertical portion (121), and the inner surface of the connecting insulating wall (3a) may be structured to be bent parallel to the outer surface.

[0176] A fixed barrier (120) may be further provided on the inside of the barrier (100) provided on the inside of the connecting insulation wall (3a).

[0177] A fixed wall (120) may be further arranged on the folded inner surface of the connecting insulation wall (3a). As illustrated, the fixed wall (120) may have a structure in which wrinkles are formed toward the inside.

[0178] At this time, the fixed barrier (120) can be fixed to the barrier (100) using a fixing member (108). For example, the fixing member (108) can be a welded member formed by membrane welding.

[0179] The insulating wall (3, 5) provided on the first side and the insulating wall (3, 5) provided on the second side can be provided so that the sides facing each other are parallel along the reference line (112) that divides the first side and the second side.

[0180] Accordingly, both sides of each primary insulation wall (3) disposed on both sides of the separation portion (114) and the connecting insulation wall (3a) inserted into the separation portion (114) and disposed close to the primary insulation wall (3) can be cut according to the cutting line (113) illustrated in Fig. 9.

[0181] This means that the connecting insulation wall (3a) and the primary insulation wall (3) in contact with the connecting insulation wall (3a) are cut into a chamber, and the structure is cut along the cutting line (113) parallel to the reference line (112).

[0182] As a result, as illustrated in Fig. 10, the side surfaces of the primary and secondary insulation walls (3, 5) positioned close to the reference line (112) may all be structured to be parallel to the reference line (112). That is, the side surfaces of the primary insulation wall (3) and the secondary insulation wall (5) facing the separation portion (114), and both sides of the connecting insulation wall (3a) may be structured to be parallel to the reference line (112).

[0183] The thickness line (116) provided vertically on the inner and outer sides of the insulating wall (3, 5) may have a structure that is inclined with respect to the reference line (112).

[0184] In the case of the fourth embodiment, the corner panel (102) can be removed and the angled portion of the vertical section (121) can be constructed using only the flat panel (104), thereby improving construction efficiency compared to the third embodiment. In other words, since there is no need to separately manufacture the corner panel (102), the production cost can be reduced, and construction can be improved by constructing using only the flat panel (104).

[0185] In addition, there is an advantage in that the number of heat paths (106) that occur between the secondary insulation walls (5) can be reduced, thereby minimizing the occurrence of heat convection.

[0186]

[0187] The vertical portion (121) of the liquefied gas storage tank (1) corresponds to a structure that is positioned at a certain height (e.g., 5 m) or higher in the portion in contact with the bottom portion (122), and has a structure that is somewhat different from the bottom portion (122) (see Fig. 1).

[0188] The vertical section (121) illustrated in FIGS. 11 to 29, which will be described below, is a structure in which a portion in contact with the floor section (122) is placed at a certain height (e.g., 5 m) or higher, and corresponds to a structure in which one insulating wall is placed, and is a structure in which a secondary barrier wall (4) placed between the primary insulating wall (3) and the secondary insulating wall (5) can be omitted (see FIG. 3).

[0189] FIGS. 11 to 29, which will be described below, may have the same structure as FIG. 3. Although some components are omitted in the illustration, it is of course possible to include components arranged at each location as in FIG. 3.

[0190]

[0191] Figure 11 is a drawing for explaining a heat convection problem occurring in the vertical section of a conventional liquefied gas storage tank.

[0192] Fig. 11 (a) is a drawing showing a vertical cross-section of a liquefied gas storage tank (1), and Fig. 11 (b) is a drawing showing a cross-section according to S1 shown in (a).

[0193] First, referring to (a) of Fig. 11, a conventional general vertical section has a structure including a barrier wall (100) forming a storage space for storing liquefied gas, and an insulating wall (200) provided between the barrier wall (100) and a support structure (300). The insulating wall (200) may be a structure fixed to the support structure (300) by mastic (6) and studs (7).

[0194] The insulating wall (200) may be a structure including a primary plywood (31) arranged on both sides of the insulating material (210) to be in contact with the barrier wall (100), and a secondary plywood (52) arranged toward the support structure (300).

[0195] A gap may be provided between the insulating walls (200), and the gap may have a structure in which an insert insulation material (220) is inserted. The insert insulation material (220) may include glass wool.

[0196] However, if the construction of the insert insulation (220) is immature or in an extremely low temperature state, a gap may be generated around the insert insulation (220) due to the shrinkage phenomenon of the insulation (210). The gap is generated due to differences in the amount of thermal shrinkage and expansion between the insulation (210) and the insert insulation (220).

[0197] In the case of Fig. 11, there is a problem in that heat convection occurs in the direction from the barrier (100) toward the support structure (300) through the above gap. Additionally, heat convection also occurs due to the temperature difference between the section where the mastic (6) is placed between the insulating wall (200) and the support structure (300).

[0198] The thermal convection generated in this way can move through the space between the support structure (300) and the insulating wall (200), as shown in (a) and (b) of FIG. 11. In some cases, an additional structure for blocking thermal convection is placed in a portion of the section where the mastic (6) is placed between the insulating wall (200) and the support structure (300), but this is insufficient to prevent the thermal convection phenomenon described above.

[0199] The liquefied gas storage tank (1) according to the present invention, as described below in FIGS. 12 to 18, is intended to improve the heat convection problem (particularly, the heat convection phenomenon occurring between the insulation wall (200) and the support structure (300)) that occurs through the gap of the conventional insert insulation (220) described above.

[0200]

[0201] FIG. 12 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to a fifth embodiment of the present invention, FIG. 13 is a partial cross-sectional view for explaining a manufacturing process of a connecting insulation material in a liquefied gas storage tank according to a fifth embodiment of the present invention, and FIG. 14 is a drawing showing a cross-section along S2 in a vertical portion of a liquefied gas storage tank according to FIG. 12.

[0202] According to the fifth embodiment illustrated in FIGS. 12 to 15, a liquefied gas storage tank (1) may include a barrier wall (100) forming a storage space for storing liquefied gas, a plurality of insulating walls (200) provided on the outside of the barrier wall (100), and an insert insulating material (220) inserted into a gap between adjacent insulating walls (200).

[0203] The plurality of insulating walls (200) may include primary plywood (31) arranged on a surface facing the barrier (100) and secondary plywood (52) arranged on a surface facing the support structure (300).

[0204] Referring to Fig. 12, a plurality of insulating walls (200) may have steps formed at portions facing each other on the surface facing the support structure (300).

[0205] In addition, the liquefied gas storage tank (1) may further include a connecting insulation material (32a) that overlaps the insert insulation material (220) along the inner and outer directions, and is arranged in the above-mentioned step and close to the support structure (300).

[0206] Specifically, a plurality of insulating walls (200) are provided with a step height a from the lower surface of the insulating wall (200) close to the support structure (300) toward the barrier wall (100), and the height b of the connecting insulating material (32a) in the direction parallel to the height of the step can be provided to be a or more. Accordingly, the connecting insulating material (32a) can be arranged to protrude from the insulating wall (200) by a certain distance.

[0207] The connecting insulation (32a) may include a connecting plywood (31a) disposed on the lower surface facing the support structure (300) and glass wool (222) disposed on the upper surface.

[0208] Glass wool (222) serves to block the gap in the path from the insert insulation (220) to the space between the support structure (300) and the insulation wall (200), and the glass wool (222) can be placed to adjust the step.

[0209] The connecting plywood (31a) can be arranged to secure the connecting insulation (32a) to the support structure (300) through the first fastening portion (420).

[0210] Figure 14 (a) is a drawing showing a vertical portion (121) of a liquefied gas storage tank according to Figure 12, and Figure 14 (b) is a drawing showing a cross-section according to S2 shown in (a).

[0211] As shown in (a) of Fig. 14, as the connecting insulation (32a) is placed on the step formed on the outside of the insert insulation (220), it can be confirmed that the connecting plywood (31a) of the connecting insulation (32a) is visible in (b) of Fig. 14. The part where the connecting plywood (31a) is visible in (b) of Fig. 14 is the area where the insert insulation (220) was visible in Fig. 11.

[0212] As a result, as the connecting insulation (32a) is positioned to protrude close to the barrier wall (100), it is possible to block the heat convection flowing from the insert insulation (220) and the heat convection phenomenon occurring between the insulation wall (200) and the support structure (300).

[0213] In particular, even if a gap or the like occurs in the insert insulation (220) and the thermal convection blocking function is lost, the thermal convection phenomenon as in Fig. 11 does not occur because the connecting insulation (32a) can block the thermal convection.

[0214] That is, it has the effect of blocking both vertical and horizontal heat convection in Fig. 11.

[0215] Referring to FIG. 12, a plurality of insulating walls (200) and a support structure (300) can be fastened through a fastening member (400).

[0216] The fastening member (400) may include a main fastening member (410) including a mastic (6) and a stud (7), and a first fastening member (420) that fastens a connecting insulation material (32a) and a support structure (300). The first fastening member (420) may include a stud bolt (7, 660) and a nut (662) coupled thereto.

[0217] The first fastening member (420) has one side fixed to the support structure (300) and the other side can be fixed inside the connecting insulation material (32a) by penetrating the connecting plywood (31a).

[0218] Figure 13 is an enlarged drawing of the connecting insulation (32a) to explain the manufacturing and placement process of the connecting insulation (32a).

[0219] After constructing the support structure (300), before placing the insulating wall (200) on the support structure (300), a connecting insulating material (32a) can be placed on the support structure (300). Thereafter, the insulating wall (200) with the step formed can be fastened to the support structure (300).

[0220] As shown in Fig. 13, the connecting insulation (32a) may be manufactured to include a structure in which a portion is penetrated, including the portion where the first fastening member (420) is first fastened. Prior to manufacturing the penetration structure, glass wool (222) may be placed.

[0221] Through the penetration structure, a nut (662) can be connected to a stud bolt (660) protruding from a connecting insulation material (32a), and after connecting the nut (662), the connecting insulation material (32a) can be inserted into the penetration portion and filled.

[0222] After this, the insulation wall (200) with the step formed is fastened to the support structure (300), and then, through the insert insulation (200), glass wool (222) can be further filled on the surface of the connecting insulation (32a).

[0223] In FIGS. 12 to 14, the first fastening portion (420) for fastening the connecting insulation (32a) and the supporting structure (300) is illustrated as a joint between a stud bolt (660) and a nut (662), but the present invention is not limited thereto. The connecting insulation (32a) and the supporting structure (300) may also be fastened by bonding with mastic (6).

[0224]

[0225] FIG. 15 is a cross-sectional view illustrating a vertical portion of a liquefied gas storage tank according to a sixth embodiment of the present invention, and FIG. 16 is a drawing illustrating a cross-section along S3 in the vertical portion of the liquefied gas storage tank according to FIG. 15.

[0226] According to the sixth embodiment illustrated in FIG. 15, the liquefied gas storage tank (1) may include a barrier wall (100) forming a storage space for storing liquefied gas, a plurality of insulating walls (200) provided on the outside of the barrier wall (100), and an insert insulating material (220) inserted into a gap between adjacent insulating walls (200).

[0227] The plurality of insulating walls (200) may include primary plywood (31) arranged on a surface facing the barrier (100) and secondary plywood (52) arranged on a surface facing the support structure (300).

[0228] As in Fig. 12, a plurality of insulating walls (200) may have steps formed at portions facing each other on the surface facing the support structure (300).

[0229] The liquefied gas storage tank (1) may further include an insert insulation material (220) and a connecting insulation material (32a) that overlaps along the inner and outer directions, provided on the above-mentioned step and positioned close to the support structure (300).

[0230] Specifically, a plurality of insulating walls (200) are provided with a step height a from the lower surface of the insulating wall (200) close to the support structure (300) toward the barrier wall (100), and the height b of the connecting insulating material (32a) in the direction parallel to the height of the step can be provided to be a or more. Accordingly, the connecting insulating material (32a) can be arranged to protrude from the insulating wall (200) by a certain distance.

[0231] The connecting insulation (32a) may include a connecting plywood (31a) disposed on the lower surface facing the support structure (300) and glass wool (222) disposed on the upper surface.

[0232] Glass wool (222) serves to block the gap in the path from the insert insulation (220) to the space between the support structure (300) and the insulation wall (200), and the glass wool (222) can be placed to adjust the step.

[0233] A connecting plywood (31a) can be arranged to secure the connecting insulation (32a) to the support structure (300).

[0234] Unlike in FIG. 12, according to FIG. 15, the fifth and sixth embodiments are different in that the connecting plywood (31a) is not a structure that is directly connected to the support structure (300).

[0235] In the sixth embodiment according to FIG. 15, a structure may further include a plurality of plates (432) arranged between the connecting plywood (31a) and the support structure (300) so that at least a portion thereof overlaps the connecting plywood (31a).

[0236] The fastening member (400) may include a main fastening member (410) that is fixed to the support structure (300) on one side and is fixed to the inside of the insulating wall (200) by penetrating the secondary plywood (52) on the other side, a plurality of plates (432) that are arranged between the connecting plywood (31a) and the support structure (300), and a second fastening member (430) that fastens the connecting plywood (31a) and the plurality of plates (432). Here, the main fastening member (410) is a fastening member that is generally used to fasten the insulating wall (200) and the support structure (300).

[0237] In the case of the fifth embodiment, in order to secure the connecting insulation (32a) to the support structure (300), a separate first connecting part (420) rather than the main connecting part (410) had to be used to connect the connecting insulation (32a) and the support structure (300).

[0238] On the other hand, the sixth embodiment has the advantage of utilizing the main fastening member (410), eliminating the need to add a separate first fastening member (420). However, there is the inconvenience of additional construction work using the second fastening member (430) to secure the plate (432) to the connecting plywood (31a) of the connecting insulation (32a).

[0239] The above additional construction work is a work of forming a groove on the connecting plywood (31a) and then riveting the second fastening part (430) into the groove.

[0240] Fig. 16 is a drawing showing a cross-section according to S3 indicated in the vertical section of the liquefied gas storage tank (1) shown in Fig. 15.

[0241] As shown in Fig. 15, as the connecting insulation (32a) is placed on the step formed on the outside of the insert insulation (220), it can be confirmed that the connecting plywood (31a) of the connecting insulation (32a) is shown in Fig. 16.

[0242] In Fig. 16, unlike Fig. 14 (b), the first fastening portion (420) is excluded, and the plate (432) and the second fastening portion (430) are additionally arranged.

[0243] The fifth and sixth embodiments differ in the fastening structure of the connecting insulation material (32a), and the effect of the sixth embodiment is the same as that of the fifth embodiment in FIGS. 12 to 14. Consequently, with the arrangement of the connecting insulation material (32a), there is an effect in which the thermal convection phenomenon as in FIG. 11 does not occur. In other words, there is an effect in which both vertical and horizontal thermal convection in FIG. 11 can be blocked.

[0244]

[0245] FIG. 17 is a cross-sectional view illustrating a vertical portion of a liquefied gas storage tank according to the seventh embodiment of the present invention, and FIG. 18 is a drawing illustrating a cross-section along S4 in the vertical portion of the liquefied gas storage tank according to FIG. 17.

[0246] According to the seventh embodiment illustrated in FIG. 17, the liquefied gas storage tank (1) may include a barrier wall (100) forming a storage space for storing liquefied gas, a plurality of insulating walls (200) provided on the outside of the barrier wall (100), and an insert insulating material (220) inserted into a gap between adjacent insulating walls (200).

[0247] The plurality of insulating walls (200) may include primary plywood (31) arranged on a surface facing the barrier (100) and secondary plywood (52) arranged on a surface facing the support structure (300).

[0248] As in Fig. 12, a plurality of insulating walls (200) may have steps formed at portions facing each other on the surface facing the support structure (300).

[0249] In addition, the liquefied gas storage tank (1) may further include a connecting insulation material (32a) that overlaps the insert insulation material (220) along the inner and outer directions, and is arranged in the above-mentioned step and close to the support structure (300).

[0250] Specifically, a plurality of insulating walls (200) are provided with a step height a from the lower surface of the insulating wall (200) close to the support structure (300) toward the barrier wall (100), and the height b of the connecting insulating material (32a) in the direction parallel to the height of the step can be provided to be a or more. Accordingly, the connecting insulating material (32a) can be arranged to protrude from the insulating wall (200) by a certain distance.

[0251] The connecting insulation (32a) may include a connecting plywood (31a) disposed on the lower surface facing the support structure (300) and glass wool (222) disposed on the upper surface.

[0252] Glass wool (222) serves to block the gap in the path from the insert insulation (220) to the space between the support structure (300) and the insulation wall (200), and the glass wool (222) can be arranged to adjust the step. The connecting plywood (31a) can be arranged to secure the connecting insulation (32a) to the support structure (300).

[0253] In the case of Fig. 12 (5th embodiment), a first fastening part (420) had to be added separately in addition to the main fastening part (410), but according to Fig. 17 (7th embodiment), there is a difference in that the connecting insulation material (32a) is fastened to the support structure (300) only by the main fastening part (410).

[0254] In addition, in the case of Fig. 15 (6th embodiment), a separate plate (432) and a second fastening part (430) were required, but in the case of Fig. 17 (7th embodiment), there is an advantageous aspect in that a separate plate (432) and a second fastening part (430) are not required.

[0255] Referring to Fig. 17, the connecting plywood (31a) included in the connecting insulation (32a) may have a structure having an area greater than the area of ​​the lower surface of the connecting insulation (32a).

[0256] Specifically, the connecting plywood (31a) may have a structure consisting of a first region (442) corresponding to the lower surface of the connecting insulation (32a), and a second region (444) corresponding to the region outside the lower surface of the connecting insulation (32a).

[0257] In the seventh embodiment, the fastening member (400) that fastens the connecting insulation (32a) to the support structure (300) may be a main fastening member (410).

[0258] The main fastening member (410) may be a stud (7), one side of which is fixed to the support structure (300), and the other side of which penetrates the second area (400) of the connecting plywood (31a) and the secondary plywood (52), and may be a structure fixed to the inside of the insulating wall (200).

[0259] Fig. 18 is a drawing showing a cross-section according to S4 indicated in the vertical section of the liquefied gas storage tank (1) illustrated in Fig. 17.

[0260] As shown in Fig. 17, as the connecting insulation (32a) is placed on the step formed on the outside of the insert insulation (220), it can be confirmed that the connecting plywood (31a) of the connecting insulation (32a) is shown in Fig. 18.

[0261] Unlike Fig. 14 (b) and Fig. 16, the first fastening part (420) and the second fastening part (430) are excluded, and the structure is fastened only by the main fastening part (410).

[0262] In the case of Fig. 17 (7th embodiment), in the structure of fastening the connecting insulation (32a) using the main fastening part (410), a connecting plywood (31a) with an enlarged size was used, which can be confirmed through the connecting plywood (31a (444)) illustrated in Fig. 18.

[0263] Embodiments 5 and 6 and Embodiment 7 have differences in the fastening structure of the connecting insulation material (32a), but the effect of Embodiment 7 is the same as that of Embodiments 5 and 6.

[0264] As a result, since the connecting insulation (32a) is positioned close to the direction of the support structure (300), there is an effect that the thermal convection phenomenon (particularly, the thermal convection phenomenon occurring between the insulation wall (200) and the support structure (300) as in Fig. 11 does not occur. In other words, there is an effect that can block both vertical and horizontal thermal convection in Fig. 11.

[0265]

[0266] FIG. 19 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the eighth embodiment of the present invention, and FIG. 20 is an enlarged view showing a part of the structure of the liquefied gas storage tank according to FIG. 19.

[0267] In the case of the prior art, as in Fig. 11, heat convection occurs in the inner and outer directions of the insulating wall (200) through the inserted insulating material (220) of the insulating wall (200).

[0268] According to the eighth embodiment, the purpose is to block heat convection in the inner and outer directions of the insulating wall (200) by arranging the connecting insulation (32a) close to the direction in which the barrier (100) is arranged, as in Fig. 19.

[0269] According to the eighth embodiment illustrated in FIG. 19, the liquefied gas storage tank (1) may include a barrier wall (100) forming a storage space for storing liquefied gas, a plurality of insulating walls (200) provided on the outer side of the barrier wall (100), and an insert insulating material (220) inserted into a gap between adjacent insulating walls (200). The insert insulating material (220) may include glass wool (222). The barrier wall (100) is illustrated to include a wrinkle (110) as illustrated in FIG. 3.

[0270] In Fig. 19, the secondary plywood (52) structure is omitted, but it is obvious that the necessary structure for the vertical section (121) may be further included as described above. In addition, although the connection between the insulating wall (200) and the support structure (300) is shown only with mastic (6), the connection may also be made using studs (7).

[0271] FIG. 20 is a drawing showing a portion including the connecting insulation (32a) illustrated in FIG. 19 in an enlarged and rotated manner. Referring to FIGS. 19 and 20, a plurality of insulation walls (200) may have a primary plywood (31) arranged on the inner side close to the barrier wall (100), and an insulation material (210) may be provided on the outer side of the primary plywood (31).

[0272] A plurality of insulating walls (200) may have steps formed in the portions facing each other on the surface facing the barrier wall (100), and may include connecting insulating materials (32a) provided in the steps and overlapping with the insert insulating material (220) in the inner and outer directions.

[0273] In addition, a fastening member (400) may be further included, which is provided on the surface facing the barrier (100) in the connecting insulation (32a) and has both ends fixed to the surface of the insulation wall (200).

[0274] On the surface of the primary plywood (31) arranged close to the step, a plywood groove (500) having a length may be provided, and the fastening member (400) may be structured to be inserted into the plywood groove (500).

[0275] The insulation (210) is provided with a step of height c from the upper surface close to the barrier (100) toward the lower surface, and the height d of the connecting insulation (32a), which is parallel to the height of the step, can be provided to be greater than c.

[0276] When the distance corresponding to the difference between d and c is d1 and the thickness of the first plywood (31) is d2, the depth of the plywood groove (500) can be d2 - d1.

[0277] That is, when the surface to which the connecting insulation (32a) is attached on the primary plywood (31) is referred to as the attachment surface, a structure may be formed in which a step having a depth of d2 - d1 is formed in an area including an area overlapping the attachment surface among the surfaces of the primary plywood (31).

[0278] The fastening member (400) is inserted into the plywood groove (500) at both ends with a connecting insulation material (32a) attached to the center, and the upper surface of the fastening member (400) inserted into the plywood groove (500) can be arranged to form the same plane as the upper surface of the primary plywood (31).

[0279] The connecting insulation (32a) and fastening member (400) are arranged without protrusion, and this may be a structure in which they are all accommodated on the inner surface of the barrier (100) where no wrinkles (110) are formed.

[0280] The two ends of the fastening member (400) may be structured to be fixed (mechanically fastened) to the two end areas where the fastening member (400) and the first plywood (31) overlap while inserted into the plywood home (500).

[0281] The lower part of the connecting insulation (32a) can be bonded to at least a portion of the step surface formed on the insulation wall (200) using an adhesive.

[0282] The purpose of the connecting insulation (32a) provided on the surface (inside) facing the barrier (100) is to block heat convection in the inside and outside directions of the insulation wall (200).

[0283] This is different in structure and effect from the case of the connecting insulation (32a) provided on the outside in FIGS. 12 to 18 described above in that its main purpose is to block heat convection flowing along the space between the insulation wall (200) and the support structure (300).

[0284]

[0285] FIG. 21 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the ninth embodiment of the present invention, and FIG. 22 is a drawing for explaining a fastening member arranged on the surface of the liquefied gas storage tank according to FIG. 21.

[0286] Figures 23 to 25 are cross-sectional views for explaining the manufacturing process of the liquefied gas storage tank according to Figure 21. Figure 23 is a drawing showing each component separated to explain the configuration of the fastening member (400) of the liquefied gas storage tank (1) according to the ninth embodiment.

[0287] According to the ninth embodiment illustrated in FIGS. 21 to 25, a liquefied gas storage tank (1) may include a barrier wall (100) forming a storage space for storing liquefied gas, a plurality of insulating walls (200) provided on the outside of the barrier wall (100), and an insert insulating material (220) inserted into a gap between adjacent insulating walls (200).

[0288] A plurality of insulating walls (200) may further include a step formed in a portion facing each other on a surface facing the barrier wall (100), a connecting insulating material (32a) provided on the step and overlapping with the insert insulating material (220) in the inner and outer directions, and a fastening member (400) provided on the surface facing the barrier wall (100) from the connecting insulating material (32a) and slidably connected to the surface of the insulating wall (200).

[0289] In FIG. 21 and FIG. 23 to FIG. 25, the secondary plywood (52) structure is omitted and illustrated, but as described above, it is of course possible to further include the structure required for the vertical portion (121).

[0290] In addition, the connection between the insulating wall (200) and the supporting structure (300) is illustrated using only mastic (6), but of course, studs (7) can be used.

[0291] A primary plywood (31) is arranged on the surface facing the barrier wall (100) of the plurality of insulating walls (200), and as illustrated in FIG. 21, the primary plywood (31) may include a connecting plywood (31a) provided on the surface of the connecting insulation (32a), and a fixed plywood (510) arranged on the surface of the plurality of insulating walls (200).

[0292] The connecting insulation (32a) illustrated in the 9th embodiment is provided on the surface (inside) facing the barrier (100), as in the 8th embodiment, for the purpose of blocking heat convection in the inside-outside direction of the insulating wall (200).

[0293] The difference between each embodiment lies in the structure of the fastening member (400) and the fastening method using the same when the connecting insulation (32a) is fixed to the insulating wall (200).

[0294] Referring to FIGS. 21 to 23, the fastening member (400) may include a pair of anchors (520) arranged to overlap the plywood (31a, 510), a connecting plate (530) arranged on the surface of the pair of anchors (520) facing the barrier (100) so that one end and the other end of each anchor (520) overlap each other among the pair of anchors (520), a pair of fixed fastening parts (540) provided at one end and the other end of the connecting plate (530) and passing through the connecting plate (530) and the anchor (520) to be fastened to the connecting plywood (31a), and a pair of movable fastening parts (550) provided at one end and the other end of the connecting plate (530) and passing through the connecting plate (530) and the anchor (520) to be fastened to the fixed plywood (510).

[0295] A pair of anchors (520) may be structured such that each end overlaps on both sides of the connecting plywood (31a) and a pair of fixed plywoods (510) arranged close to both sides of the connecting plywood (31a), and each other end overlaps on the pair of fixed plywoods (510).

[0296] That is, the anchor (520) is arranged at both ends of the connecting plywood (31a), and is a configuration necessary to connect both ends of the connecting plywood (31a) to each fixed plywood (510).

[0297] A connecting plate (530) and a pair of anchors (520) may be provided with a pair of first through holes (552) through which a pair of fixed fastening parts (540) pass, and a pair of second through holes (554) through which a pair of movable fastening parts (550) pass.

[0298] Referring to FIGS. 22 and 23, a pair of first through holes (552) may be arranged to overlap on the surface of the connecting plywood (31a), and a pair of second through holes (554) may be arranged to overlap on the surface of the fixed plywood (510).

[0299] Since the first through hole (552) formed in the connecting plate (530) and the pair of anchors (520) has a structure in which only the size of the fixed fastening part (540) is inserted is sufficient, both the upper and lower parts of the fixed fastening part (540) can be maintained in a state of being fixed to the first through hole (552).

[0300] Among the second through holes (554) formed in the connecting plate (530) and a pair of anchors (520), the second through hole (554) formed in the connecting plate (530) may include a sliding hole (556) that is a hole having a length along the longitudinal direction of the connecting plate (530). Here, the longitudinal direction means a direction horizontal to the plywood (31a, 510).

[0301] At this time, the moving fastening member (550) can slide along the longitudinal direction in the sliding hole (556).

[0302] However, since the second through hole (554) formed in the anchor (520), to which the lower end of the movable fastening part (550) is fastened, has a structure that penetrates only to the size in which the movable fastening part (550) is inserted, the lower end of the movable fastening part (550) can remain fixed to the second through hole (554) of the anchor (520).

[0303] That is, it can be seen that only the upper part of the moving fastening part (550) is capable of sliding movement within the sliding hole (556).

[0304] The anchor (520) and the connecting plate (530) can be double-fastened with a fixed fastening part (540) and a movable fastening part (550) to increase the fastening force.

[0305] The purpose of increasing the fastening force through double fastening and simultaneously enabling sliding movement of the movable fastening part (550) is to prevent stress concentration occurring in the fastening member (400) due to thermal shrinkage and expansion of the insulating wall (200). Specifically, the purpose is to alleviate local thermal stress occurring in the fastening member (400) due to shrinkage of the insulating wall (200) in a low-temperature region.

[0306] Figures 24 and 25 are drawings sequentially illustrating the process of combining the separated components in Figure 23.

[0307] Referring to FIGS. 23 and 24, a step is formed on the facing surfaces of the connecting plywood (31a) and the fixed plywood (510), and an anchor (520) can be inserted into the step. The step may have a structure having a depth equal to that of the anchor (520) being inserted.

[0308] First, as shown in Fig. 23, steps can be formed in the insulation material (210), fixed plywood (510), and connecting plywood (31a) of the insulating wall (200) to insert connecting insulation material (32a) and anchors (520). Next, it can be manufactured according to Figs. 24 and 25.

[0309] Figure 24 (a) is a drawing showing a connecting insulation material (32a) inserted into a step provided in an insulating wall (200). It can be confirmed that a step is also provided in the connecting plywood (31a) of the connecting insulation material (32a).

[0310] Figure 24 (b) is a drawing showing a state in which a pair of anchors (520) are inserted into a step formed in plywood (31a, 510) in the state of (a). Each anchor (520) is formed with a first through hole (552) and a second through hole (554).

[0311] Figure 25 (a) is a drawing showing a state in which a connecting plate (530) is arranged on the surface of an anchor (520) in the state of Figure 24 (b). The first through hole (552) and the second through hole (554) provided in the connecting plate (530) may be arranged to overlap with the first through hole (552) and the second through hole (554) provided in the anchor (520).

[0312] As described above, the second through hole (554) provided in the connecting plate (530) has the shape of a sliding groove (556) and may have a larger penetration size than the second through hole (554) provided in the anchor (520).

[0313] Figure 25 (b) illustrates a state in which a fixed fastening part (540) and a movable fastening part (550) are fastened in the state of (a). Specifically, a pair of fixed fastening parts (540) are arranged on the surface of the connecting plywood (31a) and can be fastened to the first through hole (552) provided in the connecting plate (530) and the anchor (520).

[0314] A pair of movable fasteners (550) are arranged on the surface of the fixed plywood (510) and can be fastened to the second through hole (554) provided in the connecting plate (530) and the anchor (520). The upper part of the movable fastener (550) can slide within the sliding hole (556).

[0315]

[0316] Fig. 26 is a cross-sectional view for explaining a vertical portion of a liquefied gas storage tank according to the 10th embodiment of the present invention, and Fig. 27 is a graph for explaining an effect by the liquefied gas storage tank according to Fig. 26.

[0317] According to the 10th embodiment illustrated in FIG. 26, a liquefied gas storage tank (1) may include a barrier wall (100) forming a storage space for storing liquefied gas, a plurality of insulating walls (200) provided on the outside of the barrier wall (100), and an insert insulating material (220) inserted into a gap between adjacent insulating walls (200).

[0318] A plurality of insulating walls (200) may have grooves (600) formed on the sides facing each other, and the grooves (600) may be provided on the inner side facing the barrier wall (100).

[0319] The liquefied gas storage tank (1) may further include an elastic finishing material (610) provided in a groove (600) and overlapping the insert insulation material (220) in the inner and outer directions. The elastic finishing material (610) may be provided to be fitted into the groove (600) so as to be in contact with the inner surface of the groove (600).

[0320] A plurality of insulating walls (200) may include a primary plywood (31) provided on a surface facing the barrier (100), a secondary plywood (52) arranged on a surface facing the support structure (300), and an insulating material (210) arranged between the primary plywood (31) and the secondary plywood (52).

[0321] The groove (600) can be formed by the surface formed by the primary plywood (31) and the insulation (210). Specifically, as shown in Fig. 26, when the groove (600) is viewed from above with the surface facing the barrier (100), the upper surface is open, both sides are surrounded by the primary plywood (31) and the insulation (210), and the lower surface is surrounded by the insulation (210) and the inserted insulation (220).

[0322] Looking at the shape of the groove (600), the length e of one side of the groove (600) protruding from the width of the insert insulation (220) (the length of the part of the lower surface of the groove (600) protruding from the insert insulation (220)) may have a structure in which the length f of the other side of the groove (600) parallel to the one side of the groove (600) that contacts the primary plywood (31) is greater than or equal to the length f of the other side of the groove (600).

[0323] The liquefied gas storage tank (1) according to the 10th embodiment is characterized in that, in addition to only the insert insulation (220) being placed between the insulating walls (200), it further includes an elastic finishing material (610) that is placed so as to overlap the insert insulation (220) close to the barrier wall (100).

[0324] In the structure of a conventional general insulating wall (200), glass wool (222) was used as an insert insulating material (220).

[0325] However, in the case of glass wool (222), as a heterogeneous material, it has a disadvantage in that although it has an insulating effect through conduction, the insulating effect through convection is low. As a result, there was a problem of icing occurring on one side of the insulating wall (220).

[0326] In order to solve the above problem, the liquefied gas storage tank (1) according to the present disclosure may further include an elastic finishing material (610) that is arranged to overlap an insert insulation material (220) constructed of glass wool (222).

[0327] The elastic finishing material (610) fitted into the groove (600) may include a low-temperature synthetic rubber material (EPDM; Ethylene-Propylene-Diene Rubber). The low-temperature synthetic rubber material (EPDM) is a synthetic rubber material that has excellent usability and durability.

[0328] In the case of low-temperature synthetic rubber materials (EPDM), the convection-induced insulation effect is also high, providing both insulation and the ability to block convection phenomena. Furthermore, it is easy to manufacture in various shapes, making it easy to manufacture according to the shape of the groove (600).

[0329] Figure 27 is a graph of the thermal conductivity of a low-temperature synthetic rubber material (EPDM).

[0330] This corresponds to the thermal conductivity experimental values ​​according to temperature using a 2.86 cm thick low-temperature synthetic rubber material (EPDM) (NETZSCH Analyzing & Testing).

[0331] The horizontal axis represents temperature (℃), and the vertical axis represents thermal conductivity (W / mK).

[0332] Low-temperature synthetic rubber material (EPDM) has the characteristic of excellent compatibility even at low temperatures.

[0333] From the graph shown in Fig. 27, it can be confirmed that the theoretical value (Literature value) and the measurement result (Measurement Result) of the low-temperature synthetic rubber material (EPDM) are almost the same, and thus it can be seen that when the low-temperature synthetic rubber material (EPDM) is used, the compatibility is actually high at low temperatures.

[0334]

[0335] Fig. 28 is a cross-sectional view illustrating a vulnerable structure occurring in a vertical portion of a liquefied gas storage tank, and Fig. 29 is a cross-sectional view illustrating a vertical portion of a liquefied gas storage tank according to the 11th embodiment of the present invention.

[0336] First, Fig. 28 is a cross-sectional view showing a portion of a wall (100) in which a wrinkle (110) is formed among the vertical portion (121) of a liquefied gas storage tank.

[0337] Looking at Figure 28, a barrier wall (100) having a structure in which wrinkles (110) are formed to form a storage space for storing liquefied gas and an insulating wall (200) placed on the outside of the barrier wall (100) are shown.

[0338] The insulating wall (200) may be provided with an insert insulation material (220) formed at the location of the wrinkle (110) and a through hole (640) formed at a different location from the insert insulation material (220) and filled with an insulation plug (630) therein.

[0339] The insulating wall (200) can be supported on the supporting structure (300) by being fastened by a stud bolt (660) fixed on the supporting structure (300). A through hole (640) can be arranged at the location of the stud bolt (660), and at this time, a fastening hole (650) for the stud bolt (660) to pass through can be formed in the secondary plywood (52) arranged to overlap the through hole (640) of the insulating wall (200).

[0340] The barrier (100) is a space for containing liquefied gas, which is an extremely low-temperature substance, and may be made of a metal material. However, the strength of the barrier (100) varies depending on the location of the wrinkles (110) formed in the barrier (100).

[0341] That is, the portion of the barrier wall (100) where wrinkles (110) are formed has higher strength than the portion of the barrier wall (100) where no wrinkles (110) are formed. In particular, the portion of the barrier wall (100) where vertical wrinkles (23) and horizontal wrinkles (24) intersect has the highest strength.

[0342] If, as in Fig. 28, a penetration hole (640) is provided in a portion of a barrier wall (100) without a wrinkle (110), deformation may be induced in the barrier wall (100) and the insulating wall (200) due to the load of the liquid gas contained within the barrier wall (100). This is because the portion of the insulating wall (200) where the penetration hole (640) is formed also has weak strength.

[0343] The liquefied gas storage tank (1) according to the 11th embodiment illustrated in Fig. 29 is intended to solve the deformation problem described in Fig. 28.

[0344] Fig. 29 is different from Fig. 28 only in the position of the through hole (640), and the rest of the configuration is the same, so some overlapping descriptions will be omitted.

[0345] According to the 11th embodiment illustrated in FIG. 29, a liquefied gas storage tank (1) includes a wall (100) having a grid-shaped fold (110) protruding inwardly and forming a receiving space for storing liquefied gas, and an insulating wall (200) provided on the outside of the wall (100) and fixed to a support structure (300), and the insulating wall (200) may have a structure in which at least an insulating material (210) and plywood (31, 52) are laminated along the inward direction.

[0346] The insulating wall (200) may include an insulating material (210), a primary plywood (31) provided on the side where the insulating material (210) faces the barrier wall (100), and a secondary plywood (52) provided on the side where the insulating material (210) faces the support structure (300).

[0347] In the insulating wall (200), a through hole (640) may be provided, which is formed at the location of the fixing member (620) provided in the support structure (300) and is filled with an insulating plug (630) therein.

[0348] The fixing member (620) is illustrated as an example of a stud bolt (660), but is not limited thereto. Other types of fixing members (620) may also be used by welding and fixing them to the support structure (300), with only differences in shape and form.

[0349] The fixing member (620) can be installed at an appropriate interval by welding on the inner surface of the support structure (300). For example, the stud bolt (660) can be attached to the support structure (300) by stud welding, which is an automatic arc welding method.

[0350] The liquefied gas storage tank (1) according to the 11th embodiment has a significant arrangement structure between the through hole (640) provided in the insulating wall (200) and the wrinkle (110) of the barrier wall (100).

[0351] Although not illustrated, the wrinkles (110) illustrated in Fig. 29 refer to wrinkles (110) where vertical wrinkles (23) and horizontal wrinkles (24) intersect. Accordingly, the barrier wall (100) may be provided at a position where the intersection of the lattice-shaped wrinkles (110) overlaps with the through hole (640) in the inner and outer directions.

[0352] That is, according to the 11th embodiment, the through hole (640) filled with the insulation plug (630) is characterized in that it is arranged so as to overlap the portion of the barrier wall (100) where the grid-shaped wrinkles (110) intersect. The through hole (640) is arranged in the portion of the barrier wall (100) that has the highest strength.

[0353] Referring to FIG. 29, a primary plywood (31) may be provided on the upper surface of a through hole (640) facing a barrier (100), and a secondary plywood (52) may be provided on the lower surface of the through hole (640) between an insulating plug (630) and a support structure (300).

[0354] In the secondary plywood (52), a fastening hole (650) through which a fixing member (620) passes may be provided.

[0355] The fixed member (620) may include a stud bolt (660) having one end fixed to the support structure (300) and the other end penetrating the fastening hole (650) and fixed within the insulating plug (630), a nut (662) fastened to the stud bolt (660), and an auxiliary plate (670) disposed between the nut (662) and the secondary plywood (52) to support the nut (662).

[0356] The auxiliary plate (670) may have a size corresponding to the area forming the lower surface of the through hole (640). The peripheral area of ​​the lower surface of the auxiliary plate (670) may be supported by the secondary plywood (52), and the central area of ​​the upper surface of the auxiliary plate (670) may be supported by the nut (662).

[0357] The process of manufacturing an insulating wall (200) having a through hole (640) filled with an insulating plug (630) can be referred to FIG. 13 described above.

[0358] In addition, the liquefied gas storage tank (1) may further include a receiving portion (680) provided within the insulating plug (630) to receive a portion of the fixing member (620). The receiving portion (680) may have a structure in which the insulating plug (630) is not filled.

[0359] As illustrated in Fig. 29, the insulating wall (200) structure placed on the barrier wall (100) in which the wrinkles (110) are formed may be a structure in which a first plywood (31), an insulating plug (630) filled in a through hole (640), a receiving portion (680), a fixing member (620) placed in the receiving portion (680), an auxiliary plate (670) through which the fixing member (620) passes, and a second plywood (52) provided with a fastening hole (650) are sequentially laminated.

[0360] As described above, in the 11th embodiment, the through hole (640) through which the fixing member (620) is arranged has a weaker strength than the insulating wall (200) in which the through hole (640) is not provided, so by forming the cross wrinkles (110) and arranging them to overlap the high-strength barrier wall (100), there is an effect of securing the strength of the liquid gas storage tank (1).

[0361]

[0362] Fig. 30 is a rear view of an insulating wall for explaining a vertical portion of a liquefied gas storage tank according to the 12th embodiment of the present invention.

[0363] A liquefied gas storage tank (1) according to a twelfth embodiment of the present invention may include a barrier wall (100) that comes into contact with liquefied gas and forms a storage space for receiving liquefied gas, a plurality of insulating walls (200) that are installed on a support structure (300) and provided on the outside of the barrier wall (100), a plurality of bonding strips (700) that are provided along a first direction on an outer surface of each of the plurality of insulating walls (200) that is fixed to the support structure (300), and a plurality of sealing strips (710) that are provided along a second direction that is different from the first direction.

[0364] The liquefied gas storage tank (1) according to the 12th embodiment of the present invention may be a land-based liquefied gas storage tank including an outer tank (11) formed in a cylindrical shape and an inner tank (12) installed on the inner surface and bottom of the outer tank (11).

[0365] In the above, the outer tank (11) may be formed in a cylindrical shape and may be a support structure (300) that forms the outer shape of the liquefied gas storage tank (1) by forming a cylindrical tank body having a roughly dome-shaped cover by pouring concrete or the like.

[0366] In addition, the inner part (12), as described above, may include a vertical part (121) installed on the inner surface of the outer part (11) and a bottom part (122) installed on the bottom surface of the outer part (11).

[0367] The floor portion (122) and the vertical portion (121) from the floor portion (122) to a certain height may include a barrier wall (100), a primary insulation wall (3) in which primary plywood (31) and primary insulation material (32) are sequentially laminated on the outside of the barrier wall (100), a secondary insulation wall (4) installed on the outside of the primary insulation wall (3), and a secondary insulation wall (5) in which secondary insulation material (51) and secondary plywood (52) are sequentially laminated on the outside of the secondary barrier wall (4).

[0368] In addition, the vertical portion (121) positioned above a certain height from the floor portion (122) may include a barrier wall (100), a primary plywood (31) of a primary insulation wall (3) provided on the outside of the barrier wall (100), an insulation material (210) provided on the outside of the primary plywood (31), and a secondary plywood (52) of a secondary insulation wall (5) provided on the outside of the insulation material (210).

[0369] Hereinafter, a plurality of bonding strips (700) and a plurality of sealing strips (710) according to the present embodiment are specifically described.

[0370] In the above, a plurality of bonding strips (700) are formed along the length direction on the outer surface of each of the plurality of insulating walls (200), and can be arranged in a plurality in the width direction.

[0371] In the above, a plurality of insulating walls (200) can be arranged at regular intervals in the front, back, left, and right directions, and at this time, a plurality of sealing strips (710) can block heat convection generated through the space between the plurality of bonding strips (700) and the space between the plurality of insulating walls (200).

[0372] These multiple bonding strips (700) may be mastic (6), which is an adhesive material.

[0373] In the above, the plurality of sealing strips (710) may include a first sealing strip (711) provided along the second direction in each of the plurality of insulating walls (200), and a second sealing strip (712) provided along the second direction between a pair of insulating walls (200) that are arranged adjacently among the plurality of insulating walls (200).

[0374] The first sealing strip (711) can be provided in at least one direction intersecting with the plurality of bonding strips (700), and can block heat convection generated through the space between the plurality of bonding strips (700).

[0375] These first sealing strips (711) can be provided along the width direction on the outer surface of each of the plurality of insulating walls (200), and at least one can be arranged in the length direction.

[0376] In addition, at least one second sealing strip (712) may be provided to cross the space between a pair of adjacently arranged insulating walls (200), and may be provided to intersect with at least one bonding strip (700) respectively arranged at the edge of a pair of insulating walls (200) among the plurality of bonding strips (700).

[0377] The second sealing strip (712) can block thermal convection generated through the space between a pair of insulating walls (200) and the space between bonding strips (700) provided at the edges of a pair of insulating walls (200).

[0378] At least one of these second sealing strips (712) can be arranged so as to be offset from the first sealing strip (711).

[0379] A plurality of sealing strips (710) including a first sealing strip (711) and a second sealing strip (712) can be fixed to each of the plurality of insulating walls (200) by intersecting with at least one of the plurality of bonding strips (700) when the plurality of bonding strips (700) are made of mastic (6) as an adhesive material. It goes without saying that the plurality of sealing strips (710) can be fixed to each of the plurality of insulating walls (200) in other ways.

[0380] These multiple sealing strips (710) can be formed of at least one of glass wool, polyurethane, synthetic block, and low-temperature rubber material (EPDM).

[0381] In the above, the synthetic block may include a layer in which a synthetic resin is impregnated with a reinforced synthetic fiber.

[0382] In the above, the synthetic resin may be a thermosetting resin, such as a phenol resin, an unsaturated polyester resin, an epoxy resin, or a urethane resin.

[0383] At this time, the layer is formed of a composite material composed of a mixture of at least one organic binder selected from the group consisting of phenol resin, unsaturated polyester resin, epoxy resin, and urethane resin and glass fiber, and may be formed as a single layer or a multilayer in which at least two or more layers are cross-laminated.

[0384] In the above, the glass fiber is a reinforced glass fiber with high strength and a melting point of 1,000°C or higher, and the content may be 30% to 90% of the total content of the composite material.

[0385] The layer prepared in this way has a density of 800 kg / ㎥ to 3000 kg / ㎥.

[0386] Additionally, the layer may have a moisture content of 0.14% and an intrinsic moisture content of 0.18%, a tensile strength of 248 MPa to 268 MPa, a flexural strength of 153 MPa to 163 MPa, a vertical compressive strength of 180 MPa to 190 MPa, a horizontal compressive strength of 340 MPa to 360 MPa, a vertical shear strength of 60.9 MPa to 61.9 MPa, a horizontal shear strength of 54 MPa to 64 MPa, and a thermal conductivity of 0.1660 W / mK to 0.1668 W / mK.

[0387] In addition, the liquefied gas storage tank (1) according to the 12th embodiment of the present invention may further include an insert insulation material (220) inserted into a gap between a plurality of insulating walls (200), and a connecting insulation material (32a) overlapping the insert insulation material (220) along the inner and outer directions. Here, the insert insulation material (220) and the connecting insulation material (32a) may be the insert insulation material (220) and the connecting insulation material (32a) of the 5th embodiment, the 6th embodiment, and the 7th embodiment described with reference to FIGS. 12, 15, and 17.

[0388] In the above, the connecting insulation (32a) may be provided on a step formed in a portion facing each other on the surface of a plurality of insulating walls (200) facing the support structure (300), and may block thermal convection generated through the space between the plurality of insulating walls (200) and the support structure (300). At this time, the second sealing strip (712) may be omitted because interference may occur with the connecting insulation (32a).

[0389] In addition, the liquefied gas storage tank (1) according to the 12th embodiment of the present invention may further include an insert insulation material (220) inserted into a gap between a plurality of insulating walls (200), and a connecting insulation material (32a) overlapping the insert insulation material (220) along the inner and outer directions. Here, the insert insulation material (220) and the connecting insulation material (32a) may be the insert insulation material (220) and the connecting insulation material (32a) of the 8th and 9th embodiments described with reference to FIGS. 19 and 21.

[0390] In the above, the connecting insulation (32a) can be provided in a step formed in a portion facing each other on the surface of a plurality of insulation walls (200) facing the barrier (100), and can block heat convection in the internal and external directions of the plurality of insulation walls (200) through the insert insulation (220).

[0391] Through this, the present embodiment can effectively block thermal convection occurring between the plurality of thermal insulation walls (200) and the support structure (300) by providing a plurality of bonding strips (700) along a first direction on the outer surface fixed to the support structure (300) of each of the plurality of thermal insulation walls (200) and providing a plurality of sealing strips (710) along a second direction different from the first direction, and in addition, by configuring connecting insulation materials (32a) in various ways on the surfaces of the plurality of thermal insulation walls (200) facing each other, thermal convection occurring through the space between the plurality of thermal insulation walls (200) and the support structure (300) and / or thermal convection in the inside and outside directions of the plurality of thermal insulation walls (200) can be effectively blocked.

[0392]

[0393] Figures 31 (a) and (b) are cross-sectional views for explaining the vertical portion of a liquefied gas storage tank according to the 13th embodiment of the present invention.

[0394] A liquefied gas storage tank (1) according to a 13th embodiment of the present invention may include a barrier wall (100) that comes into contact with liquefied gas and forms a storage space for accommodating liquefied gas, a plurality of insulating walls (200) that are installed on a support structure (300) and provided on the outside of the barrier wall (100), an insert insulating material (220) that is inserted into a gap between the plurality of insulating walls (200), a support strip (800) that is provided along a horizontal direction perpendicular to the direction of gravity in a space (SP) between the support structure (300) and the plurality of insulating walls (200), and a sealing strip (810) that is provided above the support strip (800) and supported in the direction of gravity by the support strip (800).

[0395] The liquefied gas storage tank (1) according to the 13th embodiment of the present invention may be a land-based liquefied gas storage tank including an outer tank (11) formed in a cylindrical shape and an inner tank (12) installed on the inner surface and bottom of the outer tank (11).

[0396] In the above, the outer tank (11) may be formed in a cylindrical shape and may be a support structure (300) that forms the outer shape of the liquefied gas storage tank (1) by forming a cylindrical tank body having a roughly dome-shaped cover by pouring concrete or the like.

[0397] In addition, the inner part (12) may include a vertical part (121) installed on the inner surface of the outer part (11) and a bottom part (122) installed on the bottom surface of the outer part (11).

[0398] The floor portion (122) and the vertical portion (121) from the floor portion (122) to a certain height may include a barrier wall (100), a primary insulation wall (3) in which primary plywood (31) and primary insulation material (32) are sequentially laminated on the outside of the barrier wall (100), a secondary insulation wall (4) installed on the outside of the primary insulation wall (3), and a secondary insulation wall (5) in which secondary insulation material (51) and secondary plywood (52) are sequentially laminated on the outside of the secondary barrier wall (4).

[0399] In addition, the vertical portion (121) positioned above a certain height from the floor portion (122) may include a barrier wall (100), a primary plywood (31) of a primary insulation wall (3) provided on the outside of the barrier wall (100), an insulation material (210) provided on the outside of the primary plywood (31), and a secondary plywood (52) of a secondary insulation wall (5) provided on the outside of the insulation material (210).

[0400] Below, the support strip (800) and sealing strip (810) according to the present embodiment are specifically described.

[0401] In the above, the support strip (800) can be formed in a ring shape in which one end is in contact with the insulating wall (200) placed below the insert insulation (220) and the other end is in contact with the inner surface of the support structure (300).

[0402] At this time, at least one end of one end and the other end of the support strip (800) can be fixed to either the insulation wall (200) or the support structure (300).

[0403] The support strip (800) can be installed on the inner surface of the support structure (300) before installing the plurality of insulating walls (200) on the support structure (300).

[0404] Additionally, the support strip (800) can be installed on one side of a plurality of insulating walls (200) when manufacturing a plurality of insulating walls (200).

[0405] These support strips (800) can be formed of at least one of a member formed of concrete, a layer formed of glue, and a board formed of wood.

[0406] In the above, the sealing strip (810) can be formed to a size having a width that covers at least the insert insulation (220) and a thickness corresponding to the width of the space (SP) while the lower part is supported by the support strip (800), and can block heat convection generated through the space (SP) and heat convection in the internal and external directions of the plurality of insulation walls (200) through the insert insulation (220).

[0407] The sealing strip (810) has a rectangular cross-sectional shape and can be inserted and installed in a space (SP).

[0408] Additionally, the sealing strip (810) has a rectangular cross-sectional shape and can be temporarily installed along the inner surface of the support structure (300) with an adhesive (820) before installing a plurality of insulating walls (200) on the support structure (300).

[0409] The sealing strip (810) may basically have a rectangular cross-sectional shape as shown in (b) of FIG. 31, and may have a groove formed on the surface that contacts the support structure (300) as shown in (a) of FIG. 31.

[0410] These sealing strips (810) can be formed of at least one of glass wool, polyurethane, synthetic block, and low-temperature rubber material (EPDM).

[0411] In the above, the synthetic block may include a layer in which a synthetic resin is impregnated with a reinforced synthetic fiber, and is the same as or similar to the synthetic block described in the 12th embodiment, so a detailed description thereof will be omitted here to avoid redundant description.

[0412] In this embodiment, a support strip (800) is provided in a horizontal direction perpendicular to the direction of gravity in a space (SP) between a support structure (300) and a plurality of insulating walls (200), and a sealing strip (810) is provided above the support strip (800) so as to be supported in the direction of gravity by the support strip (800), thereby eliminating the risk of detachment of the sealing strip (810) that blocks thermal convection between the support structure (300) and the plurality of insulating walls (200) by the support strip (800), thereby effectively blocking thermal convection generated through the space (SP) between the plurality of insulating walls (200) and the support structure (300) and / or thermal convection in the inward and outward directions of the plurality of insulating walls (200) through the insert insulation (220).

[0413] FIG. 32 is a partial perspective view for explaining a lower wall finishing part in a liquefied gas storage tank according to the 14th embodiment of the present invention, FIG. 33 is an enlarged view of part A of FIG. 32 for explaining a lower wall finishing part in a liquefied gas storage tank according to the 14th embodiment of the present invention, and FIG. 34 (a) to (c) are drawings for explaining a process of installing a lower wall finishing part in a liquefied gas storage tank according to the 14th embodiment of the present invention.

[0414] Referring to FIGS. 32 to 34, a liquefied gas storage tank (1) according to a 14th embodiment of the present invention may include a primary barrier (2) that comes into contact with liquefied gas and forms a storage space for liquefied gas, at least one insulating wall installed on a support structure and provided on the outside of the primary barrier (2), a secondary barrier (4) installed between the insulating walls and provided at a certain height from the bottom of the storage space, and a lower barrier finishing part (100) that secures the secondary barrier (4) to the support structure.

[0415] In the above, the support structure may be the outer shell (11) of the aforementioned liquefied gas storage tank (1).

[0416] In addition, the insulating wall may be a multi-layer insulating wall including a primary insulating wall (3) in which a primary plywood (31) and a primary insulating material (32) are sequentially laminated on the outside of the primary barrier (2) in the aforementioned liquefied gas storage tank (1), and a secondary insulating wall (5) in which a secondary insulating material (51) and a secondary plywood (52) are sequentially laminated on the outside of the secondary barrier (4) installed on the outside of the primary insulating wall (3).

[0417] The liquefied gas storage tank (1) according to the 14th embodiment of the present invention may be a land-based liquefied gas storage tank including an outer tank (11) formed in a cylindrical shape and an inner tank (12) installed on the inner surface and bottom of the outer tank (11).

[0418] In the above, the outer tank (11) may be formed in a cylindrical shape and may be a support structure that forms the outer shape of the liquefied gas storage tank (1) by forming a cylindrical tank body having a roughly dome-shaped cover by pouring concrete or the like.

[0419] In addition, the inner part (12), as described above, may include a vertical part (121) installed on the inner surface of the outer part (11) and a bottom part (122) installed on the bottom surface of the outer part (11).

[0420] In addition, the inner wall (12) may include a lower wall finishing part (100) that is installed on a vertical part (121) at a certain height from the bottom part (122) and that fixes the secondary wall (4) to the outer wall (11), and an upper wall finishing part that is installed on the upper end of the vertical part (121) and fixes the primary wall (2) to the outer wall (11).

[0421] In the above, the lower barrier finish (100) will be described later.

[0422] In addition, the upper wall finishing part may be configured like the upper wall finishing part (300) of the 16th embodiment described later with reference to FIG. 36, but is not limited thereto and may be configured in various ways.

[0423] In the above, the vertical portion (121) and the floor portion (122) located at the lower portion based on the lower barrier wall finishing portion (100) may include a primary barrier wall (2), a primary insulation wall (3) in which primary plywood (31) and primary insulation material (32) are sequentially laminated on the outside of the primary barrier wall (2), a secondary barrier wall (4) installed on the outside of the primary insulation wall (3), and a secondary insulation wall (5) in which secondary insulation material (51) and secondary plywood (52) are sequentially laminated on the outside of the secondary barrier wall (4).

[0424] In addition, the vertical section (121) positioned between the lower barrier finish (100) and the upper barrier finish may include a primary barrier (2), a primary plywood (31) of a primary insulation wall (3) provided on the outside of the primary barrier (2), one of the primary insulation material (32) of the primary insulation wall (3) provided on the outside of the primary plywood (31) or the secondary insulation material (51) of the secondary insulation wall (5), and a secondary plywood (52) of the secondary insulation wall (5) provided on the outside of the insulation material.

[0425] Below, the lower barrier finishing part (100) of the present invention is described in detail.

[0426] The lower barrier finishing part (100) is used to fix the secondary barrier (4) to the support structure and may include an internal plate (110), a protruding plate (120), a step buffer means (130), and a sealing plate (140).

[0427] The built-in plate (110) can be installed by being embedded along the inner surface of the support structure at a certain height from the bottom of the liquefied gas storage tank (1).

[0428] The built-in plate (110) can be formed of a metal material, and allows the secondary barrier (4) to be fixed to the support structure through the protruding plate (120), the step buffer means (130), and the sealing plate (140).

[0429] The protruding plate (120) can protrude inward from the built-in plate (110).

[0430] The protruding plate (120) can be formed of a metal material and can be fixed to the built-in plate (110) by welding or the like.

[0431] The protruding plate (120) may extend inward from the built-in plate (110), but may extend at least so as not to exceed the secondary barrier (4).

[0432] The step buffer (130) may be formed of a metal material and may be configured to alleviate the internal and external step difference between the protruding plate (120) and the secondary barrier (4).

[0433] The step buffer means (130) can be formed in a 'ㄷ' shape consisting of an upper horizontal plate, a vertical plate connected to the upper horizontal plate, and a lower horizontal plate connected to the vertical plate and parallel to the upper horizontal plate.

[0434] The corner portions where the upper horizontal plate and the vertical plate, and the lower horizontal plate and the vertical plate are connected may be formed in a curved shape. The reason for forming the corner portion in a curved shape is that if the corner portion is sharp, there is a risk of damage during or after installation of the sealing plate (140) formed of a composite material.

[0435] This step buffer means (130) can alleviate the internal and external step difference between the protruding plate (120) and the secondary barrier (4) by sliding the upper horizontal plate back and forth while in contact with the upper surface of the protruding plate (120) so that the vertical plate is placed on the same line as the secondary barrier (4), and then fixing the end of the upper horizontal plate to the upper surface of the protruding plate (120) by welding or the like.

[0436] In addition, the step buffer means (130) is installed to support the sealing plate (140) in the space between the protruding plate (120) and the secondary barrier (4), thereby preventing the wrinkle phenomenon of the sealing plate (140). That is, since the sealing plate (140) is formed of a composite material, wrinkles may occur in the space between the protruding plate (120) and the secondary barrier (4), so it is preferable to fill the space with the step buffer means (130).

[0437] The sealing plate (140) can be formed of a composite material.

[0438] The sealing plate (140) can be formed of various materials having a multilayer structure in which the first member / aluminum foil (AF) / second member are laminated. At this time, at least one of the first member and the second member can be a glass cloth (GC), a glass-aramid cloth (GAC), a basalt cloth (BC), or a glass cloth (GC) / aluminum foil (AF) / glass cloth (GC). Here, the glass-aramid cloth (GAC) is a material applied to a glass cloth, and can be manufactured by mixing one aramid string per two glass fiber strings.

[0439] For example, the sealing plate (140) of the present invention can be formed of a first material having a three-layer structure in which glass fabric (GC) / aluminum foil (AF) / glass-aramid fabric (GAC) are laminated.

[0440] In addition, the sealing plate (140) can be formed of a second material having a five-layer structure in which glass fabric (GC) / aluminum foil (AF) / glass fabric (GC) / aluminum foil (AF) / glass fabric (GC) are laminated.

[0441] In addition, the sealing plate (140) can be formed of a third material having a three-layer structure in which basalt fabric (BC) / aluminum foil (AF) / basalt fabric (BC) are laminated.

[0442] The sealing plate (140) can be in contact with the outer surface of the step buffer means (130) and seal the connection between the protruding plate (120) and the secondary barrier (4).

[0443] The sealing plate (140) has a folded ‘ㄱ’ shape in which the upper part is connected to the protruding plate (120) and the lower part is connected to the secondary barrier (4).

[0444] The sealing plate (140) can be bonded to the upper horizontal plate of the step buffer means (130) by an adhesive (150) with the upper horizontal portion being horizontal.

[0445] The sealing plate (140) may not be bonded to the vertical plate of the step buffer means (130) at the lower part that forms a vertical position, but may be bonded to the secondary barrier (4) by an adhesive (150).

[0446] This sealing plate (140) can prevent liquefied gas from leaking to the outside together with the secondary barrier (4).

[0447] Referring to (a) to (c) of FIG. 34, the process of installing the lower barrier finishing part (100) in the liquefied gas storage tank (1) according to the 14th embodiment of the present invention will be described.

[0448] First, as shown in (a) of Fig. 34, an internal plate (110) is installed in the outer shell (11), a secondary insulation wall (5) and a secondary insulation wall (4) are formed at a lower portion based on the lower wall finishing portion (100), and a protruding plate (120) protruding inward from the internal plate (110) is fixed at a portion spaced a certain distance from the secondary insulation wall (5) by welding or the like.

[0449] As shown in (b) of Fig. 34, a step buffering means (130) is installed. The step buffering means (130) is installed by sliding the upper horizontal plate back and forth while in contact with the upper surface of the protruding plate (120) so that the sealing plate (140) does not form wrinkles in the space between the protruding plate (120) and the secondary barrier (4) while alleviating the inner and outer steps between the protruding plate (120) and the secondary barrier (4), and then fixing the end of the upper horizontal plate to the upper surface of the protruding plate (120) by welding or the like.

[0450] As shown in (c) of Fig. 34, a sealing plate (140) is installed so as to contact the outer surface of the step buffer means (130) and seal the connection between the protruding plate (120) and the secondary barrier (4). The sealing plate (140) is installed so that the upper portion, which is horizontal, is bonded to the upper horizontal plate of the step buffer means (130) by an adhesive (150), and the lower portion, which is vertical, is not bonded to the vertical plate of the step buffer means (130) and can be bonded to the secondary barrier (4) by an adhesive (150).

[0451] In this way, the lower barrier finishing part (100) according to the 14th embodiment is configured so that the secondary barrier (4) is not directly connected to the built-in plate (110), the protruding plate (120), and the step buffer means (130) formed of a metal material, but is indirectly connected through the sealing plate (140) formed of a composite material, thereby resolving the problem of excessive stress being generated due to vulnerability to thermal behavior when directly connected with a metal material, thereby reducing thermal stress and heat loss.

[0452]

[0453] Figure 35 is a cross-sectional view for explaining the lower wall finishing part of a liquefied gas storage tank according to the 15th embodiment of the present invention.

[0454] Referring to FIG. 35, a liquefied gas storage tank (1) according to a 15th embodiment of the present invention may include a primary barrier (2) that comes into contact with liquefied gas and forms a storage space for liquefied gas, at least one insulating wall installed on a support structure and provided on the outside of the primary barrier (2), a secondary barrier (4) installed between the insulating walls and provided at a certain height from the bottom of the storage space, and a lower barrier finishing part (200) that secures the secondary barrier (4) to the support structure.

[0455] In the above, the support structure may be the outer shell (11) of the aforementioned liquefied gas storage tank (1).

[0456] In addition, the insulating wall may be a multi-layer insulating wall including a primary insulating wall (3) in which a primary plywood (31) and a primary insulating material (32) are sequentially laminated on the outside of the primary barrier (2) in the aforementioned liquefied gas storage tank (1), and a secondary insulating wall (5) in which a secondary insulating material (51) and a secondary plywood (52) are sequentially laminated on the outside of the secondary barrier (4) installed on the outside of the primary insulating wall (3).

[0457] The liquefied gas storage tank (1) according to the 15th embodiment of the present invention may be a land-based liquefied gas storage tank including an outer tank (11) formed in a cylindrical shape and an inner tank (12) installed on the inner surface and bottom of the outer tank (11).

[0458] In the above, the outer tank (11) may be formed in a cylindrical shape and may be a support structure that forms the outer shape of the liquefied gas storage tank (1) by forming a cylindrical tank body having a roughly dome-shaped cover by pouring concrete or the like.

[0459] In addition, the inner part (12), as described above, may include a vertical part (121) installed on the inner surface of the outer part (11) and a bottom part (122) installed on the bottom surface of the outer part (11).

[0460] In addition, the inner wall (12) may include a lower wall finishing part (200) that is installed on a vertical part (121) at a certain height from the bottom part (122) and that fixes the secondary wall (4) to the outer wall (11), and an upper wall finishing part that is installed on the upper end of the vertical part (121) and that fixes the primary wall (2) to the outer wall (11).

[0461] In the above, the lower barrier finish (200) will be described later.

[0462] In addition, the upper wall finishing part may be configured like the upper wall finishing part (300) of the 16th embodiment described later with reference to FIG. 36, but is not limited thereto and may be configured in various ways.

[0463] In the above, the vertical portion (121) and the floor portion (122) located at the lower portion based on the lower barrier wall finishing portion (200) may include a primary barrier wall (2), a primary insulation wall (3) in which primary plywood (31) and primary insulation material (32) are sequentially laminated on the outside of the primary barrier wall (2), a secondary barrier wall (4) installed on the outside of the primary insulation wall (3), and a secondary insulation wall (5) in which secondary insulation material (51) and secondary plywood (52) are sequentially laminated on the outside of the secondary barrier wall (4).

[0464] In addition, the vertical portion (121) positioned between the lower barrier finish (200) and the upper barrier finish may include a primary barrier (2), a primary plywood (31) of a primary insulation wall (3) provided on the outside of the primary barrier (2), an insulation material of one of the primary insulation material (32) of the primary insulation wall (3) provided on the outside of the primary plywood (31) and the secondary insulation material (51) of the secondary insulation wall (5), and a secondary plywood (52) of the secondary insulation wall (5) provided on the outside of the insulation material.

[0465] Below, the lower barrier finishing part (200) of the present invention is described in detail.

[0466] The lower barrier finish (100) is used to secure the secondary barrier (4) to the support structure and may include an internal plate (210), a protruding plate (220), a sealing plate (230), a block member (240), and a panel joint (250).

[0467] The built-in plate (210) can be installed by being embedded along the inner surface of the support structure at a certain height from the bottom of the liquefied gas storage tank (1).

[0468] The built-in plate (210) can be formed of a metal material and allows the secondary barrier (4) to be fixed to the support structure through the protruding plate (220) and the sealing plate (230).

[0469] The protruding plate (220) can protrude inward from the built-in plate (210).

[0470] The protruding plate (220) can be formed of a metal material and can be fixed to the built-in plate (210) by welding or the like.

[0471] The protruding plate (220) may extend inward from the built-in plate (210), but may extend at least so as not to exceed the secondary barrier (4).

[0472] This protruding plate (220) can be bonded to the upper part of the insulating wall installed below the lower wall finish (200) by mastic (6). Here, the insulating wall can be a secondary insulating wall (5).

[0473] The sealing plate (230) can be formed of a composite material.

[0474] The sealing plate (230) can be formed of various materials having a multilayer structure in which the first member / aluminum foil (AF) / second member are laminated. At this time, at least one of the first member and the second member can be a glass cloth (GC), a glass-aramid cloth (GAC), a basalt cloth (BC), or a glass cloth (GC) / aluminum foil (AF) / glass cloth (GC). Here, the glass-aramid cloth (GAC) is a glass cloth that applies an aramid material, and can be manufactured by mixing one aramid string per two glass fiber strings.

[0475] For example, the sealing plate (230) of the present invention can be formed of a first material having a three-layer structure in which glass fabric (GC) / aluminum foil (AF) / glass-aramid fabric (GAC) are laminated.

[0476] In addition, the sealing plate (230) can be formed of a second material having a five-layer structure in which glass fabric (GC) / aluminum foil (AF) / glass fabric (GC) / aluminum foil (AF) / glass fabric (GC) are laminated.

[0477] In addition, the sealing plate (230) can be formed of a third material having a three-layer structure in which basalt fabric (BC) / aluminum foil (AF) / basalt fabric (BC) are laminated.

[0478] The sealing plate (230) is in contact with the outer surface of the block member (240) and can seal and connect between the protruding plate (120) and the secondary barrier (4).

[0479] The sealing plate (230) has a folded ‘ㄱ’ shape in which the upper part is connected to the protruding plate (220) and the lower part is connected to the secondary barrier (4).

[0480] The sealing plate (230) can be bonded to the upper surface of the protruding plate (220) with an adhesive (260) at the upper portion that is horizontal.

[0481] The sealing plate (230) may have a vertical lower portion bonded to the secondary barrier (4) by an adhesive (260), and the horizontal and vertical portions that come into contact with the outer surface of the block member (240) may not be bonded.

[0482] This sealing plate (230) can prevent liquefied gas from leaking to the outside together with the secondary barrier (4).

[0483] A block member (240) may be provided between the lower surface of the sealing plate (230) and the upper surface of the insulating wall. Here, the insulating wall may be a secondary insulating wall (5).

[0484] The block member (240) has a size that extends to the secondary barrier (4) by contacting the end of the protruding plate (220), and the corner portion at the point where the sealing plate (230) is bent can have a curved shape.

[0485] The block member (240) is installed to support the sealing plate (230) in the space between the protruding plate (220) and the secondary barrier (4), thereby preventing the sealing plate (230) from becoming wrinkled. That is, since the sealing plate (230) is formed of a composite material, wrinkles may occur in the space between the protruding plate (220) and the secondary barrier (4), so it is preferable to fill the space with the block member (240).

[0486] These block members (240) can be formed from wood blocks or synthetic blocks.

[0487] In the above, the synthetic block may include a layer in which a synthetic resin is impregnated with a reinforced synthetic fiber.

[0488] In the above, the synthetic resin may be a thermosetting resin, such as a phenol resin, an unsaturated polyester resin, an epoxy resin, or a urethane resin.

[0489] At this time, the layer is formed of a composite material composed of a mixture of at least one organic binder selected from the group consisting of phenol resin, unsaturated polyester resin, epoxy resin, and urethane resin and glass fiber, and may be formed as a single layer or a multilayer in which at least two or more layers are cross-laminated.

[0490] In the above, the glass fiber is a reinforced glass fiber with high strength and a melting point of 1,000°C or higher, and the content may be 30% to 90% of the total content of the composite material.

[0491] The layer prepared in this way has a density of 800 kg / ㎥ to 3000 kg / ㎥.

[0492] Additionally, the layer may have a moisture content of 0.14% and an intrinsic moisture content of 0.18%, a tensile strength of 248 MPa to 268 MPa, a flexural strength of 153 MPa to 163 MPa, a vertical compressive strength of 180 MPa to 190 MPa, a horizontal compressive strength of 340 MPa to 360 MPa, a vertical shear strength of 60.9 MPa to 61.9 MPa, a horizontal shear strength of 54 MPa to 64 MPa, and a thermal conductivity of 0.1660 W / mK to 0.1668 W / mK.

[0493] The panel joint (250) can be formed of an insulating material such as glass wool, and can be inserted and installed in the space between the insulating wall installed at a lower portion based on the lower wall finishing portion (200) and the insulating wall installed at an upper portion based on the lower wall finishing portion (200).

[0494] In the above, the insulating wall installed in the lower portion based on the lower barrier wall finishing portion (200) may be a multi-layer insulating wall including a primary insulating wall (3) in which a primary plywood (31) and a primary insulating material (32) are sequentially laminated on the outside of the primary barrier (2), and a secondary insulating wall (5) in which a secondary insulating material (51) and a secondary plywood (52) are sequentially laminated on the outside of the secondary barrier (4) installed on the outside of the primary insulating wall (3).

[0495] In addition, the insulating wall installed on the upper part based on the lower barrier wall finishing part (200) may be a single-layer insulating wall including the primary plywood (31) of the primary insulating wall (3) provided on the outside of the primary barrier (2), the primary insulating material (32) of the primary insulating wall (3) provided on the outside of the primary plywood (31) or the secondary insulating material (51) of the secondary insulating wall (5), and the secondary plywood (52) of the secondary insulating wall (5) provided on the outside of the insulating material.

[0496] Through this, the lower barrier finishing part (200) according to the 15th embodiment is configured so that the secondary barrier (4) is not directly connected to the built-in plate (210) and the protruding plate (220) formed of a metal material, but is indirectly connected through a sealing plate (230) formed of a composite material, thereby resolving the problem of excessive stress being generated due to vulnerability to thermal behavior when directly connected with a metal material, thereby reducing thermal stress and heat loss.

[0497]

[0498] Fig. 36 is a cross-sectional view for explaining the upper wall finishing part of a liquefied gas storage tank according to the 16th embodiment of the present invention.

[0499] Referring to FIG. 36, a liquefied gas storage tank (1) according to the 16th embodiment of the present invention may include a primary barrier (2) that comes into contact with liquefied gas and forms a storage space for liquefied gas, an insulating wall that is installed on a support structure and is provided on the outside of the primary barrier (2), and an upper barrier finishing part (300) that secures the primary barrier (2) to the support structure.

[0500] In the above, the support structure may be the outer shell (11) of the aforementioned liquefied gas storage tank (1).

[0501] In addition, the insulating wall may be a single-layer insulating wall including the primary plywood (31) of the primary insulating wall (3) provided on the outside of the primary barrier (2) in the aforementioned liquefied gas storage tank (1), the primary insulating material (32) of the primary insulating wall (3) provided on the outside of the primary plywood (31) or the secondary insulating material (51) of the secondary insulating wall (5), and the secondary plywood (52) of the secondary insulating wall (5) provided on the outside of the insulating material, and for convenience of explanation, it is referred to as an insulating wall (3, 5) hereinafter.

[0502] The liquefied gas storage tank (1) according to the 16th embodiment of the present invention may be a land-based liquefied gas storage tank including an outer tank (11) formed in a cylindrical shape and an inner tank (12) installed on the inner surface and bottom of the outer tank (11).

[0503] In the above, the outer tank (11) may be formed in a cylindrical shape and may be a support structure that forms the outer shape of the liquefied gas storage tank (1) by forming a cylindrical tank body having a roughly dome-shaped cover by pouring concrete or the like.

[0504] In addition, the inner part (12), as described above, may include a vertical part (121) installed on the inner surface of the outer part (11) and a bottom part (122) installed on the bottom surface of the outer part (11).

[0505] In addition, the inner wall (12) may include a lower wall finishing part that is installed on a vertical part (121) at a certain height from the bottom part (122) and that fixes the secondary wall (4) to the outer wall (11), and an upper wall finishing part (300) that is installed on the upper end of the vertical part (121) and that fixes the primary wall (2) to the outer wall (11).

[0506] In the above, the lower wall finishing part may be configured like the lower wall finishing part (100) of the 14th embodiment described above with reference to FIG. 33 or the lower wall finishing part (200) of the 15th embodiment described above with reference to FIG. 35, but is not limited thereto and may be configured in various ways.

[0507] Additionally, the upper wall finishing part (300) will be described later.

[0508] In the above, the vertical portion (121) and the floor portion (122) located at the lower part based on the lower barrier finish may include a primary barrier (2), a primary insulation wall (3) in which primary plywood (31) and primary insulation material (32) are sequentially laminated on the outside of the primary barrier (2), a secondary barrier (4) installed on the outside of the primary insulation wall (3), and a secondary insulation wall (5) in which secondary insulation material (51) and secondary plywood (52) are sequentially laminated on the outside of the secondary barrier (4).

[0509] In addition, the vertical section (121) positioned between the lower barrier finish and the upper barrier finish (300) may include a primary barrier (2), a primary plywood (31) of a primary insulation wall (3) provided on the outside of the primary barrier (2), one of the primary insulation material (32) of the primary insulation wall (3) provided on the outside of the primary plywood (31) or the secondary insulation material (51) of the secondary insulation wall (5), and a secondary plywood (52) of the secondary insulation wall (5) provided on the outside of the insulation material.

[0510] Below, the upper barrier finishing part (300) of the present invention is described in detail.

[0511] The upper barrier closure (300) fixes the primary barrier (2) to the support structure and may include an internal plate (310), a protruding plate (320), a sealing plate (330), a closing block (340), and a panel joint (350).

[0512] The built-in plate (310) can be installed by being embedded along the inner surface of the support structure from the upper portion of the support structure.

[0513] The built-in plate (310) can be formed of a metal material and allows the primary barrier (4) to be fixed to the support structure through the protruding plate (320) and the sealing plate (330).

[0514] The protruding plate (320) can protrude inward from the built-in plate (310).

[0515] The protruding plate (320) can be formed of a metal material and can be fixed to the built-in plate (310) by welding or the like.

[0516] The protruding plate (320) may extend inward from the built-in plate (310), but may extend at least so as not to exceed the primary barrier (2).

[0517] The sealing plate (330) can be formed of a metal material.

[0518] The sealing plate (330) has a folded ‘ㄱ’ shape and can seal and connect between the protruding plate (320) and the primary barrier (2).

[0519] The sealing plate (330) can be fixed to the protruding plate (320) by welding or the like, after the horizontal plate is slid back and forth while in contact with the lower surface of the protruding plate (320) so that the vertical plate is placed on the same line as the inner surface of the insulating wall (3, 5). The vertical plate of the sealing plate (330) can be fixed to the primary barrier (2) by welding or the like.

[0520] This sealing plate (330) can prevent liquefied gas from leaking to the outside together with the primary barrier (2).

[0521] A closing block (340) can be provided between the insulating wall (3, 5) and the protruding plate (320) and between the insulating wall (3, 5) and the sealing plate (330).

[0522] This closing block (340) may include a first closing block (341) provided between the insulating wall (3, 5) and the protruding plate (320), and a second closing block (342) provided between the insulating wall (3, 5) and the sealing plate (330).

[0523] The above-mentioned first closing block (341) and second closing block (342) can be formed as an integral or separate type.

[0524] The lower surface of the first closing block (341) and the lower surface of the second closing block (342) may be positioned on the same line. At this time, the upper surface of the first closing block (341) may be positioned on the same line as the upper surface of the sealing plate (330).

[0525] The second closing block (342) can be fixedly connected to the sealing plate (330) by a riveting method or a stud method.

[0526] At this time, the sealing plate (330) can be fixed to the protruding plate (320) by welding or the like while the second closing block (342) is previously fixedly connected to the inner surface.

[0527] The above-mentioned first closing block (341) and second closing block (342) may be formed of the same or different materials, but may be formed of at least one of a wood block, a synthetic block, and reinforced polyurethane foam.

[0528] In the above, the synthetic block may include a layer in which a synthetic resin is impregnated with a reinforced synthetic fiber.

[0529] In the above, the synthetic resin may be a thermosetting resin, such as a phenol resin, an unsaturated polyester resin, an epoxy resin, or a urethane resin.

[0530] At this time, the layer is formed of a composite material composed of a mixture of at least one organic binder selected from the group consisting of phenol resin, unsaturated polyester resin, epoxy resin, and urethane resin and glass fiber, and may be formed as a single layer or a multilayer in which at least two or more layers are cross-laminated.

[0531] In the above, the glass fiber is a reinforced glass fiber with high strength and a melting point of 1,000°C or higher, and the content may be 30% to 90% of the total content of the composite material.

[0532] The layer prepared in this way has a density of 800 kg / ㎥ to 3000 kg / ㎥.

[0533] Additionally, the layer may have a moisture content of 0.14% and an intrinsic moisture content of 0.18%, a tensile strength of 248 MPa to 268 MPa, a flexural strength of 153 MPa to 163 MPa, a vertical compressive strength of 180 MPa to 190 MPa, a horizontal compressive strength of 340 MPa to 360 MPa, a vertical shear strength of 60.9 MPa to 61.9 MPa, a horizontal shear strength of 54 MPa to 64 MPa, and a thermal conductivity of 0.1660 W / mK to 0.1668 W / mK.

[0534] The panel joint (350) can be formed of an insulating material such as glass wool, and can be inserted and installed in the tolerance zone that occurs between the insulating wall (3, 5) and the closing block (340).

[0535] Through this, the lower wall finishing part (300) according to the 16th embodiment can increase weldability and workability by reducing the tolerance range in which the panel joint (350) is inserted and installed and facilitating management, and can increase insulation performance by reducing the application area of ​​glass wool.

[0536] In addition, the lower barrier closure (300) according to the 16th embodiment can relatively reduce the on-board workload by configuring the closing block (340) to be fixedly coupled in advance to the inner surface of the sealing plate (330).

[0537]

[0538]

[0539] A corner structure is applied to the perimeter of the bottom of the liquefied gas storage tank (1). The corner structure is described with reference to FIGS. 37 to 39.

[0540] FIG. 37 is a partially exploded perspective view of a corner structure of a liquefied gas storage tank according to a 17th embodiment of the present invention, FIG. 38 is a front view of a corner structure of a liquefied gas storage tank according to a 17th embodiment of the present invention, and FIG. 39 is a cross-sectional view of a corner structure of a liquefied gas storage tank according to a 17th embodiment of the present invention.

[0541] Referring to FIGS. 37 to 39, the corner structure of the liquefied gas storage tank (1) may be formed by a combination of a plurality of corner blocks (CB). A plurality of flat blocks may be connected to a plurality of corner blocks (CB) at the corner portion of the liquefied gas storage tank (1).

[0542] A corner block (CB) may be composed of a lower block (LB) fixed to a wall or an outer wall (11), an upper block (UUB) bonded to the lower block (LB) and having a width narrower than the front, back, left, and right width of the lower block (LB), and an upper connecting block (UBB) provided between the upper blocks (UUB) arranged adjacently.

[0543] The lower block (LB) may have an upper block (UUB) and an upper connection block (UBB) installed on the upper surface, and may be composed of a corner secondary barrier (41b) bonded to the lower surface of the upper block (UUB), a corner connection barrier (42b) bonded to the lower surface of the upper connection block (UBB) and connecting the adjacent corner secondary barriers (41b) when the lower blocks (LB) are arranged adjacently, and a corner secondary insulation wall (5b) including an inner secondary plywood (51b), a corner secondary insulation material (52b), and an outer secondary plywood (54b).

[0544] The corner secondary insulation wall (5b) may include an outer first fixing part (5b1) and an outer second fixing part (5b2) which are respectively fixed to the inner side of the first side and the second side and are configured with a structure in which an inner secondary plywood (51b), a corner secondary insulation material (52b), and an outer secondary plywood (54b) are sequentially laminated. The outer first fixing part (5b1) may be fixed to the inner side of the first side, and the outer second fixing part (5b2) may be fixed to the inner side of the second side.

[0545] The upper block (UUB) may be bonded to the lower block (LB) and may be formed of a single board having a width narrower than the front-rear, left-right, and right-left widths of the lower block (LB). The upper block (UUB) may be formed by arranging multiple unit upper blocks (UB1, UB2, UB3, UB4) adjacent to each other and in parallel.

[0546] The upper block (UUB) may be provided with a barrier fixing member (21b) in which a plurality of unit barrier fixing members (21b1, 21b2, 21b3, 21b4) are independently arranged in parallel and adjacent to each other in a portion corresponding to each of the plurality of unit upper blocks (UB1, UB2, UB3, UB4).

[0547] The upper block (UUB) may be formed of a corner primary insulation wall (3b) including an inner first fixing part (3b1) and an inner second fixing part (3b2) in which an inner primary plywood (31b), a corner primary insulation material (32b), and an outer primary plywood (33b) are sequentially laminated on the outside of the barrier fixing part (21b). The inner first fixing part (3b1) and the inner second fixing part (3b2) may be provided symmetrically with respect to a direction (ED) that equally divides the corner portion. The inner first and second fixing parts (3b1, 3b2) may be fixed by a plurality of unit barrier fixing parts (21b1, 21b2, 21b3, 21b4).

[0548] The inner first fixing part (3b1) may be fixed to the outer first fixing part (5b1) and provided on the inner side of the first surface, and the inner second fixing part (3b2) may be fixed to the outer second fixing part (5b2) and provided on the inner side of the second surface. In addition, the corner first insulating wall (3b) may include an inner bent part (3b3) formed by filling an insulating material between the inner first fixing part (3b1) and the inner second fixing part (3b2).

[0549] When a plurality of corner blocks (CB) are adjacently arranged along the edge of a corner portion where the first and second sides at different angles face each other, an inner bend portion (3b3) can be formed in the space portion between the adjacent inner first and second fixing members (3b1, 3b2), i.e., in the space portion where the corner secondary barrier (41b) is exposed.

[0550] A space may be created between the sides of the inner first and second fixing members (3b1, 3b2) that are in close contact with the two sides of the inner bending member (3b3), and a corner inner packing material (3b8) may be installed in this space to prevent heat convection.

[0551] The upper block (UUB) may include a plurality of upper slits (SL1) formed at a certain depth on the upper portion to prepare for shrinkage and expansion stress of the corner primary insulation wall (3b). The upper slits (SL1) may be formed to penetrate the inner primary plywood (31b), which is the upper layer of the corner primary insulation wall (3b), and at least a portion of the corner primary insulation material (32b), which is the middle layer.

[0552] The upper slit (SL1) can be formed at a corresponding position between a plurality of unit barrier fixing members (21b1, 21b2, 21b3, 21b4) installed on the upper surface of the upper block (UUB) of each corresponding portion of a plurality of unit upper blocks (UB1, UB2, UB3, UB4) forming an existing upper block.

[0553] On one upper block (UUB), a barrier fixing member (21b) composed of a plurality of unit barrier fixing members (21b1, 21b2, 21b3, 21b4) can be installed. Each of the unit barrier fixing members (21b1, 21b2, 21b3, 21b4) can be installed adjacent to each other and parallel to the upper portion of a corner primary insulation wall (3b) forming the upper block (UUB) made of a metal material, and can be bent at a predetermined angle on the inner side of the first and second surfaces, for example, can be bent at the same angle as the angle formed by the first and second surfaces at different angles forming a storage space for accommodating liquefied gas.

[0554] The corner primary barrier is fixedly connected to the corner primary insulation wall (3b) by a barrier fixing member (21b) installed on the upper part of the corner primary insulation wall (3b). The corner primary barrier may be used to mean a barrier fixing member (21b), etc.

[0555] The upper connecting block (UBB) is connected to the upper surface of the adjacent lower block (LB). The upper connecting block (UBB) can be installed in the space exposed between the adjacent upper blocks (UUB).

[0556] The upper connecting block (UBB) may be formed of a corner connecting insulation wall (34b) arranged on the outside of the barrier fixing member (21b). The corner connecting insulation wall (34b) of the upper connecting block (UBB) may be installed between the barrier fixing member (21b) and the corner connecting insulation wall (42b).

[0557] These corner connecting insulation walls (34b) are provided on the inner sides of the first and second sides, respectively, and may include a corner first connecting fixing member (34b1) and a corner second connecting fixing member (34b2) configured in a structure in which a corner first connecting plywood (342b), a corner connecting insulation material (341b), and a corner second connecting plywood (343b) are sequentially laminated on the outer side of a corner first barrier fixing member (21b) to which the corner first barrier is fixed.

[0558] The corner connecting insulation wall (34b) is installed in the corner space between the first corner connecting fixing part (34b1) and the second corner connecting fixing part (34b2), and may include a corner connecting bending part (34b3) made of insulating material.

[0559] A corner inner packing material (34b4) is inserted and installed in the space between the first and second corner connecting fixing parts (34b1, 34b2). The corner inner packing material (34b4) may be the same as or similar to the corner inner packing material (3b8) inserted and installed in the space between the first and second inner fixing parts (3b1, 3b2).

[0560] When an upper connecting block (UBB) is installed between adjacent integrated upper blocks (UUB), a step space (SS) may be created between the inner first and second fixing members (3b1, 3b2) and the corner first and second connecting members (34b1, 34b2). A stuffing piece (SP) may be inserted into the step space (SS).

[0561]

[0562] FIG. 40 is a partial perspective view for explaining a side opening formed in a liquefied gas storage tank according to the 19th embodiment of the present invention, FIG. 41 is a partial perspective view for explaining that a sealing plate is connected to a side opening formed in a liquefied gas storage tank according to the 19th embodiment of the present invention, and FIG. 42 is a partial perspective view for explaining that a side opening formed in a liquefied gas storage tank according to the 19th embodiment of the present invention is covered.

[0563] In FIGS. 40 to 42, the side opening (8) can be formed on the first surface of the wall of the storage space for storing liquefied gas, and in FIGS. 40 to 42, the first surface is omitted.

[0564] The side opening (8) serves as a passage connecting the receiving space and the outside of the liquefied gas storage tank (1), allowing internal and external work materials and equipment to be brought in or taken out and for workers to pass through.

[0565] The side opening (8) is an area opened to connect the receiving space and the outside, and any part of the liquefied gas storage tank (1) other than the side opening (8) can be closed or sealed.

[0566] Referring to Fig. 40, the side opening (8) may be provided in a wall forming a storage space for storing liquefied gas. The side opening (8) may be formed adjacent to a corner wall (88) provided at a connection point between the first side and the second side. The first side corresponds to the side where the side opening (8) is formed, and the second side may correspond to a side that is parallel to the foundation or formed toward the foundation.

[0567] The above side opening (8) can be formed on multiple surfaces of the wall. For example, the side opening (8) can be formed across the first surface of the wall and the first-first surface adjacent to the first surface.

[0568] For example, the first side may correspond to a side parallel to the vertical portion (121), and the second side may correspond to a side parallel to the bottom portion (122). The first side and the second side may form a certain angle with each other. For example, the first side and the second side may be perpendicular to each other. However, the connecting angle between the first side and the second side may not be limited to 90 degrees.

[0569] The corner barrier (88) can correspond to the corner structure of FIGS. 37 to 39 described above.

[0570] Although the corner barrier (88) is shown as having a 90-degree bend in FIGS. 40 to 42, it is not limited thereto. The corner barrier (88) is provided at the connection point between the first and second surfaces and may vary depending on the connection angle between the first and second surfaces.

[0571] The corner wall (88) can be divided into a part placed on the first side and a part placed on the second side based on the bend.

[0572] The side opening (8) is positioned adjacent to the corner wall (88) and can be finished at the periphery by a first plate (81). In Fig. 40, a portion of the side opening (8) is shown, with the first plate (81) having a 'U' shape, but the first plate (81) can be formed in a shape that surrounds the periphery of the side opening (8).

[0573] The first plate (81) may be formed so that a portion of the corner wall (88) is connected to the first surface thereof and overlaps the corner wall (88). Alternatively, the first plate (81) may be spaced apart from the corner wall (88).

[0574] The primary barrier (2) is a barrier that can come into contact with liquefied gas and is provided on the second surface and can be connected to the corner barrier (88). Referring to Fig. 40, the primary barrier (2) can be connected to the upper side of the corner barrier (88). The primary barrier (2) can be connected to the portion of the corner barrier (88) that is located on the second surface.

[0575] The primary barrier (2) may be formed of a corrugated membrane sheet having a grid-like shape. The primary barrier (2) may be provided with a first side and a second side to form a storage space for storing liquefied gas.

[0576] Wrinkles can be divided into horizontal wrinkles (21) and vertical wrinkles (22) when the primary barrier (2) is provided on the second surface, and can be divided into vertical wrinkles (23) and horizontal wrinkles (24) when the primary barrier (2) is provided on the first surface.

[0577] Referring to Fig. 41, the sealing plate (83) can sealingly connect the portion placed on the first surface of the corner barrier (88) and the first plate (81). The sealing plate (83) can be arranged to overlap the corner barrier (88) and the first plate (81) to sealingly connect the connecting portion or gap between the corner barrier (88) and the first plate (81). The sealing plate (83) can have a wrinkle corresponding to the horizontal wrinkle (21) of the first barrier (2).

[0578] The sealing plate (83) may correspond to a shape in which the primary barrier (2) is cut vertically.

[0579] The wrinkles provided on the sealing plate (83) can be arranged to correspond to the horizontal wrinkles (21) of the primary barrier (2). The wrinkles provided on the sealing plate (83) can be arranged on an extension of the horizontal wrinkles (21) of the primary barrier (2).

[0580] The connecting barrier (85) can connect the sealing plate (83) and the primary barrier (2) provided on the second surface.

[0581] The connecting barrier (85) covers a plurality of upper slits (SL1) formed in the corner barrier (88), and can be connected to the sealing plate (83) on one side and to the primary barrier (2) on the other side. Specifically, the connecting barrier (85) can connect the wrinkles of the sealing plate (83) and the horizontal wrinkles (21) of the primary barrier (2).

[0582] In addition, the connecting barrier (85) may be connected to the primary barrier (2) provided on the first surface on one side and in contact with the sealing plate (83) or the corner barrier (88) on the other side, and may be connected to the primary barrier (2) provided on the second surface on the other side.

[0583] The connecting barrier (85) may include wrinkles of a similar shape to the wrinkles extending in one direction among the lattice-shaped wrinkles provided in the primary barrier (2). The connecting barrier (85) may include wrinkles of a similar shape and may cover the wrinkles of the sealing plate (83) and the wrinkles of the primary barrier (2).

[0584] In Fig. 41, the connecting barrier (85) is illustrated as being formed in multiple pieces, each of which covers one upper slit (SL1) and one wrinkle. The connecting barrier (85) may cover at least one upper slit (SL1) and one wrinkle, and thus may not be limited to the shape of Fig. 41.

[0585] In Fig. 41, the sealing plate (83) seals the portion placed on the first surface of the first plate (81) and the corner barrier (88), and the connecting barrier (85) can cover the sealing plate (83) and the primary barrier (2). The sealing plate (83) and the connecting barrier (85) can be sealed to prevent leakage of liquefied gas in the area except for the side opening (8) in the receiving space.

[0586] When work on the accommodation space excluding the side opening (8) is completed, unnecessary materials and equipment can be removed outside and the side opening (8) can be blocked. The first plate (81) that closes the periphery of the side opening (8) can be removed. The sealing plate (83) can be cut in a portion adjacent to the first plate (81) when the first plate (81) is removed.

[0587] Referring to FIG. 41, the sealing plate (83) can be cut along a cutting line (87) shown on the upper side of the sealing plate (83). The cutting line (87) can be formed on the first surface. Some areas of the sealing plate (83) can be removed together with the first plate (81).

[0588] Upon completion of removing the first plate (81) and cutting the sealing plate (83), a primary barrier (2) may be provided on the first side. Referring to Fig. 42, an additional primary barrier (2) may be provided on the first side to cover the side opening (8). The primary barrier (2) provided on the first side may be positioned to be in contact with the sealing plate (83) or the corner barrier (88).

[0589] The side opening (8) may have an insulating panel including an insulating wall installed on the inside. The insulating panel may be inserted into the inside of the side opening (8) to close the opening of the side opening (8). The insulating panel may have a size corresponding to the opening of the side opening (8). The insulating panel may have a form in which the insulating wall and the barrier are laminated.

[0590] It may include a primary barrier (2) provided on the first surface and covering the side opening (8) inside the insulating panel.

[0591] The primary barrier (2) provided on the first side can be arranged to correspond to the primary barrier (2) provided on the second side. The primary barriers (2) provided on the first side and the second side can be arranged with their wrinkles facing each other. The vertical wrinkle (23) of the primary barrier (2) provided on the first side can be arranged in a straight line with the wrinkles of the sealing plate (83). The vertical wrinkle (23) of the primary barrier (2) provided on the first side can be arranged in a straight line or an extension with the horizontal wrinkle (21) of the primary barrier (2) provided on the second side.

[0592] A primary barrier (2) may be additionally provided on the first surface and connected to a cut portion of the sealing plate (83). The sealing plate (83) may be cut along a cutting line (87) to facilitate connection with the primary barrier (2).

[0593] The corner barrier (88) may be directly connected to the primary barrier (2) provided on the first surface, or may be connected via a sealing plate (83) at the portion placed on the first surface. The corner barrier (88) may be directly connected to the primary barrier (2) provided on the second surface, at the portion placed on the second surface.

[0594] A liquefied gas storage tank (1) according to the 19th embodiment of the present invention may have a side opening (8) formed adjacent to a corner wall (88). A portion of the side opening (8) may be adjacent to or in contact with the corner wall (88).

[0595] When the side opening (8) is positioned a considerable distance above the corner barrier (88), the side opening (8) can be connected to the barrier with a flat surface in all areas. The finish of the surrounding portion of the side opening (8) can all have the same shape.

[0596] However, when the side opening (8) is positioned adjacent to the corner barrier (88) as in the present embodiment, the lower area of ​​the side opening (8) may be adjacent to or connected to the corner barrier (88). The lower area of ​​the side opening (8) may have a different finishing form from the remaining areas.

[0597] In this embodiment, the first plate (81) that closes the corner barrier (88) and the side opening (8) can be efficiently closed through the sealing plate (83) and the connecting barrier (85).

[0598] In this embodiment, the side opening (8) is formed at the lower side so as to be relatively close to the foundation or corner wall (88), making it easy to apply to a tank of small size or for mock-up, and the height of the side opening (8) is lowered, so that transportation of materials and equipment or movement of workers can be improved.

[0599] A liquefied gas storage tank (1) according to the 19th embodiment of the present invention may include a side opening installation step (S100), a sealing plate installation step (S200), a connection barrier installation step (S300), a removal step (S400), and a cover step (S500).

[0600] The side opening installation step (S100) can install a side opening (8) opened on the first side of the receiving space adjacent to a corner wall (88). The side opening installation step (S100) can install a first plate (81) that closes the periphery of the side opening (8).

[0601] The sealing plate installation step (S200) may be a step of installing a sealing plate (83) between the first plate (81) and the corner barrier (88). The sealing plate (83) may sealingly connect the first plate (81) with a portion placed on the first surface of the corner barrier (88).

[0602] The sealing plate installation step (S200) can prevent liquefied gas leakage between the first plate (81) and the corner barrier (88) by installing the sealing plate (83). In the sealing plate installation step (S200), a primary barrier (2) can be installed on the second surface.

[0603] The connecting barrier installation step (S300) may be a step of installing a connecting barrier (85) that connects the sealing plate (83) and the primary barrier (2) provided on the second surface. The connecting barrier (85) may be provided with wrinkles having a similar shape to the wrinkles of the primary barrier (2). The connecting barrier (85) covers a plurality of upper slits (SL1) formed in the corner barrier (88), and one side may be connected to the sealing plate (83) and the other side may be connected to the primary barrier (2).

[0604] The removal step (S400) may be a step of removing the first plate (81) that closes the periphery of the side opening (8) after the work and organization of the receiving space is completed. The removal step (S400) may cut a portion of the sealing plate (83) along with the removal of the first plate (81). The sealing plate (83) may be removed along with the first plate (81) by cutting the upper side of the cutting line (87).

[0605] The cover step (S500) may be a step of covering the side opening (8) through the primary barrier (2). The cover step (S500) may block the opened side opening (8) by additionally providing the primary barrier (2) on the first surface. The primary barrier (2) provided on the first surface in the cover step (S500) may be connected to the upper side of the sealing plate (83).

[0606] A method for manufacturing a liquefied gas storage tank according to one aspect of the present invention comprises the steps of: installing a corner wall at a connection point between a first surface of a wall forming a storage space for storing liquefied gas and a second surface forming a predetermined angle with the first surface; installing a side opening adjacent to the corner wall on the first surface; installing a first plate on a peripheral portion of the side opening; installing a sealing plate between the first plate and the corner wall; installing a primary wall connected to the corner wall on the second surface; and installing a connecting wall between the sealing plate and the primary wall.

[0607] Specifically, it may include a step of removing the first plate by cutting a portion of the sealing plate; a step of installing an insulating panel including an insulating wall on the inside of the side opening; and a step of installing a primary barrier covering the side opening on the first surface.

[0608]

[0609] FIG. 43 is a partial perspective view illustrating that a sealing plate is connected to a side opening formed in a liquefied gas storage tank according to the 20th embodiment of the present invention, FIG. 44 is a partial perspective view illustrating that a sealing plate is connected to a primary barrier in a side opening formed in a liquefied gas storage tank according to the 20th embodiment of the present invention, and FIG. 45 is a partial perspective view illustrating that a side opening formed in a liquefied gas storage tank according to the 20th embodiment of the present invention is covered.

[0610] The liquefied gas storage tank (1) according to the 20th embodiment of the present invention may have a different sealing plate (83) from the liquefied gas storage tank (1) according to the 19th embodiment of the present invention described above.

[0611] The side opening (8), the first plate (81), the corner barrier (88) and the primary barrier (2) may be the same as those of the liquefied gas storage tank (1) according to the 19th embodiment of the present invention.

[0612] A side opening (8) is provided on the first surface of a wall forming a storage space for storing liquefied gas, and a first plate (81) can finish a peripheral portion of the side opening (8). A corner barrier (88) is provided at a connection point between the first surface of the wall and a second surface forming a certain angle with the first surface, and the first plate (81) can be connected. A primary barrier (2) is provided on the second surface and can be connected to the corner barrier (88).

[0613] The above side opening (8) can be formed across the first surface of the wall and the first-first surface adjacent to the first surface. The first surface and the second surface can be perpendicular to each other.

[0614] Referring to Fig. 43, the sealing plate (83) can sealingly connect the first plate (81) with the portion placed on the second surface of the corner barrier (88). The sealing plate (83) can be formed in a folded shape and provided on the upper side of the corner barrier (88).

[0615] The sealing plate (83) has a lateral cross-section in a folded shape and can extend along the width direction of the side opening (8). The sealing plate (83) can be formed with a width longer than the width of the side opening (8).

[0616] The sealing plate (83) is formed with a width longer than the width of the primary plate so that the area where the primary plate and the corner barrier (88) are adjacent can be sealed and connected.

[0617] A portion of the sealing plate (83) may be provided on the first side and the remaining portion may be provided on the second side. The sealing plate (83) may be bent so as to be connected to the first side and the second side simultaneously.

[0618] The sealing plate (83) can cover a plurality of upper slits (SL1) formed in the corner wall (88).

[0619] The sealing plate (83) of Fig. 43 can simultaneously perform the roles of the sealing plate (83) of Fig. 41 and the connection barrier (85).

[0620] Referring to Fig. 44, the sealing plate (83) can be connected to the primary barrier (2) provided on the second surface. The sealing plate (83) can be formed in a folded shape so that one side is connected to the first plate (81) and the other side is connected to the primary barrier (2).

[0621] The sealing plate (83) can sealingly connect the primary barrier (2) and the first plate (81) to prevent liquefied gas from leaking between the primary barrier (2) and the first plate (81).

[0622] The sealing plate (83) may be formed with a flat surface. The sealing plate (83) may be formed with a smooth surface, unlike the wrinkles formed on the primary barrier (2).

[0623] The sealing plate (83) can be connected without considering the arrangement with the wrinkles of the primary barrier (2).

[0624] When connecting the sealing plate (83) and the primary barrier (2), the wrinkles of the primary barrier (2) can be spaced apart from the surface of the sealing plate (83). The sealing plate (83) is connected to the surface between the wrinkles in the primary barrier (2), and the wrinkles of the primary barrier (2) can protrude upward from the sealing plate (83).

[0625] A reinforcing material can be installed inside the wrinkles of the primary barrier (2), and the reinforcing material can be connected to the sealing plate (83) to prevent leakage of liquefied gas.

[0626] When work on the accommodation space excluding the side opening (8) is completed, unnecessary materials and equipment can be removed outside and the side opening (8) can be blocked. The first plate (81) and the sealing plate (83) that close the periphery of the side opening (8) can be removed. The sealing plate (83) can be removed simultaneously with or sequentially with the removal of the first plate (81).

[0627] Referring to Fig. 44, the sealing plate (83) and the primary barrier (2) can be cut along the cutting line (87) shown in the primary barrier (2). The primary barrier (2) can have a portion of the sealing plate (83) adjacent to the sealing plate (83) cut when the sealing plate (83) or the first plate (81) is removed.

[0628] The cutting line (87) may correspond to a portion of the area where the sealing plate (83) and the primary barrier (2) overlap or to the boundary line of the sealing plate (83) provided on the second surface. The cutting line (87) may be formed on the second surface.

[0629] The primary barrier (2) may be manufactured larger than standard or designed to take into account cutting, as some areas may be cut along the cutting line (87).

[0630] The primary barrier (2) can be cut to a horizontal length of approximately 10 mm to 100 mm adjacent to the sealing plate (83). Specifically, the primary barrier (2) can be cut to a horizontal length of approximately 40 mm. The horizontal folds (21) of the primary barrier (2) can also be cut like the sealing plate (83).

[0631] After the removal of the first plate (81) and the cutting of the sealing plate (83) and the primary barrier (2) are completed, a primary barrier (2) can be provided on the first side. Referring to Fig. 45, a primary barrier (2) can be additionally provided on the first side to cover the side opening (8).

[0632] The above liquefied gas storage tank (1) includes an insulating wall and may include an insulating panel installed on the inside of the side opening (8) when the sealing plate (83) or the first plate (81) is removed. In addition, the above liquefied gas storage tank (1) may include a primary barrier (2) provided on the first surface to cover the side opening (8) inside the insulating panel.

[0633] The primary barrier (2) provided on the first side can be connected to the corner barrier (88). The primary barrier (2) provided on the first side can be arranged to be in contact with the corner barrier (88). The primary barrier (2) provided on the first side can be arranged to be in contact with the portion of the corner barrier (88) that is located on the first side.

[0634] The primary barrier (2) provided on the first side can be arranged to correspond to the primary barrier (2) provided on the second side. The primary barriers (2) provided on the first side and the second side can be arranged with their wrinkles facing each other. The vertical wrinkles (23) of the primary barrier (2) provided on the first side can be arranged in a straight line or an extension of the horizontal wrinkles (21) of the primary barrier (2) provided on the second side.

[0635] The connecting barrier (85) can be arranged in a straight line or an extension of the vertical wrinkles (23) and the horizontal wrinkles (21). The connecting barrier (85) can be connected to the primary barrier (2) provided on the first surface on one side and connected to the primary barrier (2) provided on the second surface on the other side.

[0636] Specifically, the connecting barrier (85) can connect the vertical wrinkles (23) of the primary barrier (2) provided on the first surface and the horizontal wrinkles (21) of the primary barrier (2) provided on the second surface.

[0637] The connecting barrier (85) may include wrinkles of a similar shape to the wrinkles extending in one direction among the lattice-shaped wrinkles provided in the primary barrier (2). The connecting barrier (85) may include wrinkles of a similar shape and may cover the vertical wrinkles (23) of the primary barrier (2) and the horizontal wrinkles (21) of the primary barrier (2).

[0638] The connecting barrier (85) can cover a plurality of upper slits (SL1) formed in the corner barrier (88) in place of the sealing plate (83). The connecting barrier (85) can be placed at a position before the sealing plate (83) is removed.

[0639] In Fig. 45, the connecting barrier (85) is illustrated as being formed in multiple pieces, each of which covers one upper slit (SL1). The connecting barrier (85) may cover at least one upper slit (SL1), and thus may not be limited to the shape of Fig. 45.

[0640] In Fig. 45, the connecting barrier (85) can be arranged on the upper side of the primary barrier (2) provided on the first surface and the primary barrier (2) provided on the second surface to cover the primary barrier (2). The corner barrier (88) can be directly connected to the primary barrier (2) provided on the first surface at the portion thereof, and can be directly connected to the primary barrier (2) provided on the second surface at the portion thereof.

[0641] The corner barrier (88) can be directly connected to the primary barrier (2) provided on the first side and the second side, respectively.

[0642] A liquefied gas storage tank (1) according to the 20th embodiment of the present invention may include a side opening installation step (S100), a sealing plate installation step (S200), a removal step (S300), a cover step (S400), and a connection barrier installation step (S500).

[0643] The side opening installation step (S100) can install a side opening (8) opened on the first side of the receiving space adjacent to a corner wall (88). The side opening installation step (S100) can install a first plate (81) that closes the periphery of the side opening (8).

[0644] The sealing plate installation step (S200) may be a step of installing a sealing plate (83) between the first plate (81) and the corner barrier (88). The sealing plate (83) may sealingly connect a portion of the corner barrier (88) placed on the second surface with the first plate (81). A portion of the corner barrier (88) placed on the second surface may also be connected to the sealing plate (83).

[0645] The sealing plate installation step (S200) can prevent liquefied gas leakage between the first plate (81) and the corner barrier (88) by installing the sealing plate (83). The sealing plate installation step (S200) can cover a plurality of upper slits (SL1) formed in the corner barrier (88) through the sealing plate (83) in a bent shape. In the sealing plate installation step (S200), a primary barrier (2) can be installed on the second surface.

[0646] The removal step (S300) may be a step of removing the first plate (81) and the sealing plate (83) that close the periphery of the side opening (8) after the work and organization of the receiving space are completed. The removal step (S300) may include cutting a portion of the primary barrier (2) along with the removal of the first plate (81) and the sealing plate (83). The primary barrier (2) may be cut in a portion of the cutting line (87).

[0647] The cover step (S400) may be a step of covering the side opening (8) through the primary barrier (2). The cover step (S400) may block the opened side opening (8) by additionally providing the primary barrier (2) on the first side. The primary barrier (2) provided on the first side in the cover step (S400) may be connected to the upper side of the corner barrier (88).

[0648] In the cover step (S400), the primary barrier (2) provided on the first side can be arranged to correspond to the primary barrier (2) provided on the second side. The vertical wrinkles (23) of the primary barrier (2) provided on the first side can be arranged on a straight line or an extension of the horizontal wrinkles of the primary barrier (2) provided on the second side.

[0649] The connecting barrier installation step (S500) may be a step of installing a connecting barrier (85) that connects the primary barrier (2) provided on the first side and the primary barrier (2) provided on the second side. The connecting barrier (85) may be provided with wrinkles of a similar shape to the wrinkles of the primary barrier (2).

[0650] The connecting barrier (85) covers a plurality of upper slits (SL1) formed in the corner barrier (88), and can be connected to the primary barrier (2) provided on the first surface on one side and to the primary barrier (2) provided on the second surface on the other side.

[0651] In the connecting barrier installation step (S500), the connecting barrier (85) can be installed to connect the vertical wrinkles (23) of the primary barrier (2) and the horizontal wrinkles (21) of the primary barrier (2). The connecting barrier (85) can be installed after the primary barrier (2) is installed on the first side and the second side.

[0652] A method for manufacturing a liquefied gas storage tank according to one embodiment of the present invention includes the steps of: installing a corner barrier at a connection point between a first surface of a wall forming a storage space for storing liquefied gas and a second surface forming a predetermined angle with the first surface; installing a side opening adjacent to the corner barrier on the first surface; installing a first plate on a peripheral portion of the side opening; installing a sealing plate between the first plate and the corner barrier; and installing a primary barrier connected to the corner barrier on the second surface.

[0653] Specifically, the method may include: cutting a portion of the first barrier to remove the first plate; installing an insulating panel including an insulating wall on the inside of the side opening; installing a first barrier covering the side opening on the first surface; and installing a connecting barrier on the first barrier provided on the first surface and the first barrier provided on the second surface.

[0654] FIG. 46 is a partial perspective view for explaining a side opening formed in a liquefied gas storage tank according to the 21st embodiment of the present invention, FIG. 47 is a drawing for explaining a process of covering an outer gap adjacent to a side opening formed in a liquefied gas storage tank according to the 21st embodiment of the present invention, and FIG. 48 is a drawing for explaining a process of covering an inner gap adjacent to a side opening formed in a liquefied gas storage tank according to the 21st embodiment of the present invention.

[0655] A liquefied gas storage tank (1) according to the 21st embodiment of the present invention may have a storage space formed by a wall for storing liquefied gas. The wall may include a plurality of surfaces, and the surfaces may be connected to form a polygon. The storage space may have a polygonal cross-section.

[0656] Referring to Fig. 46, the side opening (8) can be formed across two adjacent surfaces of the wall. The side opening (8) can be formed across the first surface (110) of the wall and the first-first surface (111) adjacent to the first surface (110). The side opening (8) can be formed across multiple surfaces of the wall.

[0657] The side opening (8) is formed across the first surface (110) and the first-first surface (111), and the cross-section of the side opening (8) may have a bent shape. The side opening (8) may not be provided on the same plane.

[0658] The side opening (8) may be formed adjacent to the corner wall (88). The side opening (8) may be formed adjacent to the corner wall (88) connecting the first side and the second side at the lower side.

[0659] Figure 46 is a view of the side opening (8) from the receiving space inside the liquefied gas storage tank (1). The center of the side opening (8) may protrude outward compared to both ends. In the cross-section of the side opening (8), the center may protrude outward compared to both ends.

[0660] The cross-section of the side opening (8) may have a shape that is bent at the center, and both ends may have a shape that is inclined inward with respect to the center. The cross-section of the side opening (8) may not be a straight line but may have a polygon.

[0661] The side opening (8) is formed across multiple surfaces of the wall and can be formed with a width longer than one of the surfaces of the wall.

[0662] The side opening (8) is formed across the first side (110) and the 1-1 side (111), and may be formed with a width longer than the width of the first side (110) or the 1-1 side (111). The side opening (8) of Fig. 46 may have a relatively longer width compared to a side opening (8) provided on one side.

[0663] The side opening (8) of Fig. 46 has a long width even though it has the same height as the side opening (8) provided on one side, so it can have a wide vertical cross-section. The side opening (8) of Fig. 46 forms a wide opening, so that it can facilitate the transportation of materials and equipment or the movement of workers.

[0664] The receiving space may be internally finished with a primary barrier (2) and a secondary barrier (4). The primary barrier (2) may be in direct contact with liquefied gas on the inner side of the receiving space. The secondary barrier (4) may be provided between the primary barrier (2) and the wall.

[0665] Figures 47 (a) to (c) are drawings of the process of covering a secondary temporary barrier (40) provided on a wall, and are enlarged views of area A or area B in Figure 46.

[0666] The secondary temporary barrier (40) can be extended from the secondary barrier (4) provided on the wall.

[0667] The secondary temporary barrier (40) and the secondary barrier (4) may be provided on multiple surfaces of the wall, respectively. The secondary temporary barrier (40) and the secondary barrier (4) may be provided on the first surface (110) and the first-first surface (111), respectively, where a side opening (8) is formed in the wall.

[0668] Among the walls, the side where the side opening (8) is not formed can be extended so that the secondary barrier (4) is in contact with each other, and thus the secondary temporary barrier (40) can be omitted. The secondary temporary barrier (40) can be formed between the end of the secondary barrier (4) and the side opening (8). The secondary temporary barrier (40) can seal the secondary barrier (4) by finishing the end of the secondary barrier (4).

[0669] Referring to (a) of Fig. 47, the secondary barrier (4) provided on the first surface (110) and the secondary barrier (4) provided on the 1-1 surface (111) can be connected. An outer gap (93), which is an intervening space, can be formed between the secondary temporary barrier (40) provided on the first surface (110) and the secondary temporary barrier (40) provided on the 1-1 surface (111).

[0670] An outer gap (93) can be formed between the secondary barrier (4) and the side opening (8). Since the side opening (8) is formed across the first surface (110) and the first-first surface (111) which are not provided on the same plane, the outer gap (93) can be formed at the part where the first surface (110) and the first-first surface (111) come into contact.

[0671] Referring to (b) of Fig. 47, the outer gap (93) can be at least partially covered by a cover member (90). The cover member (90) can prevent the flow of liquefied gas, thereby covering the outer gap (93) and blocking the outer gap (93). The cover member (90) can seal the end of the secondary barrier (4) by covering the outer gap (93).

[0672] In (b) of Fig. 47, the cover member (90) can cover the outer gap (93) through one cover, but is not limited thereto, and cover members (90) of various sizes can cover the outer gap (93) through one or more covers.

[0673] Referring to (c) of Fig. 47, an additional cover member (91) may be provided on the upper side of the secondary barrier (4) and the secondary temporary barrier (40). The upper side of the secondary barrier (4) and the secondary temporary barrier (40) may be inward with respect to the liquefied gas storage tank (1) in the direction toward the receiving space.

[0674] The additional cover member (91) can cover the cover member (90) covering the outer gap (93) and the secondary barrier (4) at the same time. The additional cover member (91) can be selectively arranged. The cover member (90) and the additional cover member (91) can cover the secondary barrier (4), the secondary temporary barrier (40), or the outer gap (93) in various forms.

[0675] Figures 48 (a) and (b) are drawings of the process of covering the first temporary barrier (20) extending from the first barrier (2), and are enlarged views of area A or area B in Figure 46.

[0676] The first barrier (2) may be provided on the inner side of the second barrier (4), and the first temporary barrier (20) may be provided on the inner side of the second temporary barrier (40). Referring to (a) of Fig. 48, the first temporary barrier (20) may extend from the first barrier (2) provided on the inner side of the second barrier (4).

[0677] The primary temporary barrier (20) can be formed between the end of the primary barrier (2) and the side opening (8). The primary temporary barrier (20) can seal the end of the primary barrier (2) by closing it. On the surface of the wall where the side opening (8) is not formed, the primary barriers (2) can be extended while contacting each other, so the primary temporary barrier (20) can be omitted.

[0678] An inner gap (95) may be formed between the first temporary barrier (20) adjacent to the inner side of the outer gap (93) covered with the cover member (90). An inner gap (95), which is an intervening space, may be formed between the first temporary barrier (20) provided on the first surface (110) and the first temporary barrier (20) provided on the first-first surface (111).

[0679] The inner gap (95) may be located on the inner side of the outer gap (93) which is on the upper side of (a) of Fig. 48.

[0680] Referring to (b) of Fig. 48, the inner gap (95) can be covered with a cover member (90). The cover member (90) can prevent the flow of liquefied gas, thereby covering the inner gap (95) and blocking the inner gap (95). The cover member (90) can seal the end of the primary barrier (2) by covering the inner gap (95).

[0681] The cover members (90) covering the inner gap (95) and the outer gap (93) may be the same, but are not limited thereto and different cover members (90) may be used.

[0682] The first temporary barrier (20) can be provided on the inside after the outer gap (93) is covered with a cover member (90) and an additional cover member (91). The inner gap (95) can be located on the inside of the outer gap (93), and the outer gap (93) formed on the outside of the inner gap (95) can be covered by the cover member (90).

[0683] The outer gap (93) and the inner gap (95) may be formed as the side opening (8) is formed across the first surface (110) and the first-first surface (111). If the side opening (8) is formed on the first surface (110) or the first-first surface (111), the outer gap (93) and the inner gap (95) may not be formed. If the side opening (8) is formed on a single surface of the wall, the outer gap (93) and the inner gap (95) may not be formed.

[0684] The outer gap (93) and the inner gap (95) can be formed by forming the side opening (8) on multiple surfaces of the wall of the receiving space whose cross-section is polygonal. The outer gap (93) and the inner gap (95) can be formed in areas A and B of Fig. 46, respectively.

[0685] The liquefied gas storage tank (1) according to the 21st embodiment of the present invention can close the outer gap (93) and the inner gap (95) formed by the arrangement of the side opening (8) through a cover member (90).

[0686] In the liquefied gas storage tank according to the 21st embodiment of the present invention, the side opening (8) may be provided adjacent to a corner wall (88) provided at a connection point between a first surface of the wall and a second surface forming a certain angle with the first surface.

[0687] The above corner barrier (88) may include a sealing plate (83) that sealingly connects the portion placed on the second surface and the first plate (81) that closes the peripheral portion of the side opening (8).

[0688] The sealing plate (83) may have a portion of the area adjacent to the first plate (81) cut when the first plate (81) is removed.

[0689] The above liquefied gas storage tank (1) includes an insulating wall, an insulating panel installed on the inside of the side opening (8) when the first plate (81) is removed; and a primary barrier provided on the first surface to cover the side opening (8) inside the insulating panel; and the sealing plate (83) can be connected to the primary barrier (2) of which the cut portion is provided on the first surface.

[0690] The above corner wall may include a sealing plate (83) that sealingly connects the first plate (81) that closes the portion placed on the second surface and the peripheral portion of the side opening (8).

[0691] A primary barrier (2) provided on the second surface and connected to the corner barrier (88); wherein the primary barrier (2) can have a portion of an area adjacent to the sealing plate (83) cut when the sealing plate (83) or the first plate (81) is removed.

[0692] It may include an insulating wall, an insulating panel installed on the inside of the side opening (8) when the sealing plate (83) or the first plate (81) is removed; a primary barrier (2) provided on the first surface to cover the side opening (8) inside the insulating panel; and a connecting barrier (85) having one side connected to the primary barrier (2) provided on the first surface and the other side connected to the primary barrier (2) provided on the second surface.

[0693] A liquefied gas storage tank according to one embodiment of the present invention can be manufactured easily by improving the structure of the insulation wall and the barrier wall at least in the bottom portion, and can obtain effects such as reduced manufacturing cost and improved maintenance.

[0694] The present invention is not limited to the embodiments described above, and may include a combination of the above embodiments or a combination of at least one of the above embodiments and a known technology as another embodiment.

[0695] Although the present invention has been described in detail through specific examples, this is intended to specifically explain the present invention, and the present invention is not limited thereto, and it will be apparent that modifications and improvements can be made by those skilled in the art within the technical spirit of the present invention.

[0696] 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.

Claims

1. A storage tank for storing liquefied gas, comprising: a barrier wall that comes into contact with liquefied gas and forms a storage space for receiving liquefied gas; a plurality of insulating walls installed on a support structure and provided on the outside of the barrier wall; A plurality of bonding strips provided along a first direction on an outer surface of each of the plurality of insulating walls fixed to the support structure; and A liquefied gas storage tank comprising a plurality of sealing strips provided along a second direction different from the first direction.

2. In paragraph 1, The above plurality of sealing strips are, A first sealing strip provided along the second direction in each of the plurality of insulating walls; and A liquefied gas storage tank comprising a second sealing strip provided along the second direction between a pair of adjacently arranged insulating walls among the plurality of insulating walls.

3. In paragraph 1, The above plurality of sealing strips are, A liquefied gas storage tank that blocks heat convection generated through the space between the plurality of bonding strips and the space between the plurality of insulating walls.

4. A storage tank for storing liquefied gas, comprising: a primary barrier that comes into contact with liquefied gas and forms a storage space for the liquefied gas; and at least one insulating wall installed on a support structure and provided on the outside of the primary barrier; A secondary barrier installed between the above insulating walls and provided at a certain height from the floor of the storage space; and A lower barrier finish is included that secures the above secondary barrier to the above support structure, The above lower barrier finish is, An internal plate installed by being buried along the inner surface of the support structure at a predetermined height from the bottom of the storage tank; and A liquefied gas storage tank, comprising a protruding plate protruding inward from the built-in plate.

5. In paragraph 4, Step buffer means for alleviating the internal and external step difference between the above protruding plate and the second barrier; and A liquefied gas storage tank comprising a sealing plate having a folded shape and contacting an outer surface of the step buffer means and sealingly connecting between the protruding plate and the secondary barrier.

6. In paragraph 5, The above step buffer means is, A liquefied gas storage tank comprising an upper horizontal plate, a vertical plate connected to the upper horizontal plate, and a lower horizontal plate connected to the vertical plate and parallel to the upper horizontal plate.

7. In paragraph 5, The above sealing plate, The upper part, which is horizontal, is bonded to the upper horizontal plate of the step buffer means by adhesive, A liquefied gas storage tank, wherein the lower portion forming a vertical shape is bonded by the second barrier and the adhesive.

8. In paragraph 4, The above lower barrier finish is, A sealing plate having a folded shape and sealingly connecting between the protruding plate and the secondary barrier; and A liquefied gas storage tank including a block member provided between the lower surface of the sealing plate and the upper surface of the insulating wall.

9. In paragraph 8, The above sealing plate, The upper part, which is horizontal, is bonded to the upper surface of the protruding plate by adhesive, A liquefied gas storage tank, wherein the lower portion forming a vertical shape is bonded by the second barrier and the adhesive.

10. A storage tank for storing liquefied gas, comprising: a primary barrier that comes into contact with liquefied gas and forms a storage space for the liquefied gas; an insulating wall that is installed on a support structure and is provided on the outside of the primary barrier; Including an upper barrier finish that secures the above first barrier to the above support structure, The upper wall finish is, An embedded plate installed along the inner surface of the support structure on the upper portion of the support structure; A protruding plate protruding inward from the above built-in plate; and A liquefied gas storage tank comprising a sealing plate having a folded shape and sealingly connecting between the protruding plate and the first barrier.

11. In paragraph 10, The upper wall finish is, A liquefied gas storage tank further comprising a closing block provided between the insulating wall and the protruding plate and between the insulating wall and the sealing plate.

12. In paragraph 11, The upper wall finish is, A liquefied gas storage tank further comprising a panel joint inserted and installed in a tolerance zone generated between the insulating wall and the closing block.

13. A wall that forms a storage space with a polygonal cross-section for storing liquefied gas; and including a side opening formed in the above wall; The above side opening is, A liquefied gas storage tank formed across the first surface of the above wall and the first-first surface folded and connected to the first surface.

14. In paragraph 13, A barrier provided on the inside of the above wall; and A liquefied gas storage tank, comprising a temporary barrier provided at the end of the barrier facing the side opening.

15. In paragraph 14, A gap is formed between the temporary barriers provided on the first side and the first-first side, respectively. A liquefied gas storage tank comprising a cover member covering at least a portion of the gap.

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