KR102552455B1 - Liquefied gas storage tank and vessel comprising the same - Google Patents

Abstract

The present invention relates to a liquefied gas storage tank and a ship including the same. The liquefied gas storage tank of the present invention is disposed at a corner portion where a first surface and a second surface at different angles meet, and a storage space for accommodating liquefied gas. A liquefied gas storage tank including a corner block forming a, wherein the corner block is provided on the inside of the first and second surfaces, and is adjacently disposed on the lower block and bonded to a lower block made of a single board It consists of a plurality of upper blocks and an upper connection block that is bonded to the upper surface of the lower blocks disposed adjacent to each other and connects the lower blocks, and the lower blocks include a corner secondary insulation wall installed on the hull and the corner It consists of a corner secondary barrier disposed inside the secondary insulation column wall and a corner connection barrier connecting the neighboring secondary corner barrier when the lower block is disposed adjacent to each other, and the upper connection block comprises the first and second connection blocks. It is provided by being bent at a predetermined angle on the inner side of the surface, and fixes the corner primary barrier made of metal, and a barrier fixing member made of metal disposed outside the primary corner barrier, and a corner deflecting member to the outside of the barrier fixing member. Corner first and second connection fixing parts provided inside the first and second surfaces, respectively, in a structure in which a first connection plywood, a corner connection insulation material, and a corner second connection plywood are sequentially stacked, and the corner first and second connection It consists of a corner connection bent part installed between the fixing parts, and the corner second connection plywood is bonded on the corner connection barrier of the lower block with an adhesive, and the adhesive is bonded when the upper connection block is bonded. and an anti-bonding member that prevents the corner connecting bent portion and the corner connecting insulating material from coming out to the exposed surface of each of the non-bonding areas.

Description

Liquefied gas storage tank and vessel comprising the same}

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

Liquefied natural gas (LNG), liquefied petroleum gas (LPG), etc. have been widely used to replace gasoline or diesel according to recent technological developments and environmental regulations.

In addition, in ships such as LNG carriers that transport or store liquefied gas such as LNG at sea, LNG RV (Regasification Vessel), LNG FPSO (Floating, Production, Storage and Offloading), and LNG FSRU (Floating Storage and Regasification Unit) A storage tank (so-called "cargo hold") is installed to store LNG in a cryogenic liquid state, and in accordance with IMO environmental regulations, the application of LNG fuel tanks to ultra-large container ships and various cargo ships is becoming a reality.

In addition, the liquefied gas storage tank can generate boil off gas (BOG) by heat intrusion from the outside, and the natural vaporization rate (Boil Off Rate; BOR) Lowering is a key technology for liquefied gas storage tank design. In addition, since the liquefied gas storage tank is exposed to various loads such as sloshing, it may be essential to secure the mechanical strength of the insulation panel.

Considering these points, not only the mechanical strength of the insulation panel is secured, but also the insulation performance is improved even in the corner part forming a right or obtuse angle in the liquefied gas storage tank, and various loads such as sloshing, deformation of the hull, and temperature change occur. Research is being actively conducted to reduce the stress.

The present invention was created to solve the problems of the prior art as described above, and an object of the present invention is to improve the structure of the corner block to reduce the low temperature burden, sloshing burden and stress burden of the corner secondary barrier To provide a liquefied gas storage tank and a ship including the same.

A liquefied gas storage tank according to one aspect of the present invention is a liquefied gas storage tank including a corner block disposed at a corner portion where the first and second surfaces of different angles meet to form a storage space for accommodating liquefied gas. As, the corner block is provided on the inside of the first and second surfaces, a lower block made of a single board, a plurality of upper blocks disposed adjacent to and bonded to the lower block, and the lower block disposed adjacent to each other It is composed of an upper connection block that is bonded to the upper surface of the block and connects the lower blocks, and the lower block is a corner secondary insulation wall installed on the hull and a corner secondary barrier disposed inside the corner secondary insulation thermal wall. And, when the lower block is arranged adjacently, it is made of a corner connection barrier connecting the neighboring secondary corner barrier, and the upper connection block is bent at a predetermined angle on the inside of the first and second surfaces, Provided, A corner primary barrier made of metal is fixed, and a barrier fixing member made of metal disposed outside the primary corner barrier, and a corner first connection plywood, a corner connection insulation material, and a corner second connection plywood to the outside of the barrier fixing member. It has a structure in which connecting plywoods are sequentially stacked, and consists of first and second corner connection fixing parts provided on the inside of the first and second surfaces, respectively, and a corner connection bending part installed between the corner first and second connection fixing parts. , The corner second connection plywood is bonded on the corner connection barrier of the lower block with an adhesive, and the corner connection bent portion and the corner where the adhesive is a non-bonding area during bonding of the upper connection block An anti-bonding member may be included to prevent coming out of the exposed surface of each of the connected insulation materials.

Specifically, the anti-bonding member is formed of a film of a sponge material, and may be installed on the exposed surface of each of the corner connection bent portion and the corner connection insulation material, which are non-bonding areas of the upper connection block.

Specifically, the upper block has a structure in which an inner primary plywood, a corner primary insulation material, and an outer primary plywood are sequentially stacked on the outside of the barrier fixing member, respectively provided on the inside of the first and second surfaces It consists of first and second inner fixing parts and an inner bent part installed between the first and second inner fixing parts, and the anti-bonding member is formed of a film made of a sponge material, and is the non-bonding area of the upper connection block. The exposed surface of the corner connection barrier of the lower block to which the corner connection bent part is in contact, and the inner bent part of the upper block and the corner primary insulation material adjacent to the corner connection insulation material, which is a non-bonding area of the upper connection block, respectively. can be installed on the exposed surface of

Specifically, between the corner primary insulating materials of the upper blocks disposed adjacent to each other, separate filling of the insulating material may be omitted.

Specifically, between the corner primary insulation of the upper block and the corner connection insulation of the upper connection block disposed adjacent to each other, separate filling of the insulation may be omitted.

The liquefied gas storage tank and the ship equipped with the same according to the present invention can reduce the low temperature burden, sloshing burden and stress burden of the corner secondary barrier by improving the structure of the corner block.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention do not configure the inner first and second fixing parts for holding the barrier fixing member to which the corner primary barrier is fixed in the corner block only with plywood, but polyurethane By forming the composition in combination with the foam insulation, it is possible to improve the insulation performance, reduce the weight, and reduce the cost compared to the existing plywood alone.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention have a corner block primary insulation wall connected to the flat primary insulation wall of the flat block and a corner block corner 2 connected to the flat secondary insulation thermal wall of the flat block. By configuring the thickness of the blocking heat wall to be the same or similar, the thickness of the corner 1 insulation wall is relatively thick compared to the existing one (however, the thickness of the corner 2 insulation heat wall is a thickness that can maintain the mechanical strength at a certain level), and the corner 2 It is possible to reduce the low-temperature burden and sloshing burden of the secondary barrier, prevent damage to the corner secondary barrier, and reduce the low-temperature burden of the secondary corner barrier to prevent brittle fracture of the hull.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention increase the length of the non-adhesive portion of the corner secondary barrier wall by making the corner primary insulation wall thicker than the conventional one. As a result, the damage probability of the corner secondary barrier including the corner connection barrier can be further reduced due to the increase in flexibility of the corner secondary barrier, and the corner secondary barrier can easily absorb hull deformation and Stress can also be further reduced.

In addition, the liquefied gas storage tank according to the present invention and a ship equipped with the same have a predetermined interval between the inner first fixing part and the inner second fixing part provided on the inner side of the first and second surfaces at different angles, respectively. and by providing an inner intermediate fixing portion between the inner first and second fixing portions, it is possible to relieve the bending angle of the corner primary barrier by the inner intermediate fixing portion, thereby reducing the burden of sloshing at the corner primary barrier. In addition, it is possible to increase the mechanical strength of the corner portion.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention form a chamfer at the corner where the outer first fixing part and the outer second fixing part respectively fixed to the first and second surfaces at different angles face each other And, by filling the chamfer with the low-density polyurethane foam, it is possible to further increase the insulation performance at the corner by the low-density polyurethane foam.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention form a step at the corner where the outer first fixing part and the outer second fixing part respectively fixed to the first and second surfaces at different angles face each other. And, by filling the stepped portion with glass wool, the flexibility of the secondary corner barrier including the corner connection barrier formed on the upper portion of the glass wool is improved, and damage to the secondary corner barrier can be further prevented.

In addition, the liquefied gas storage tank according to the present invention and a ship equipped with the same are spaced apart at a predetermined interval between the outer first fixing part and the outer second fixing part fixed to the first and second surfaces at different angles, respectively, By providing an outer intermediate fixing portion between the outer first and second fixing portions, the gap formed between the outer first fixing portion and the outer intermediate fixing portion and between the outer second fixing portion and the outer intermediate fixing portion, respectively. It is possible to prevent damage to the corner secondary barrier fixed to the outer fixing part by relieving the contraction or expansion stress caused by the temperature of the outer fixing part compared to the gap of the dog.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention form a chamfer at the corner where the outer first fixing part and the outer second fixing part respectively fixed to the first and second surfaces at different angles face each other And, by installing the corner secondary barrier along the surface of the outer first and second fixing parts including the chamfer portion, the corner secondary barrier protrudes outward and is bent to increase the length of the non-adhered portion to the corner secondary insulation wall. , Due to the increased flexibility of the corner secondary barrier, not only can the damage probability of the corner secondary barrier including the corner connection barrier be further lowered, but the corner secondary barrier also facilitates hull deformation absorption and further reduces low-temperature stress. It can be.

In addition, in the liquefied gas storage tank and the ship equipped with the same according to the present invention, a plurality of corner primary insulation walls including inner primary plywoods forming a step with the corner primary insulation material are disposed on the corner secondary insulation thermal wall, By configuring the corner primary insulation material to be disposed adjacently, it not only facilitates the installation handling of the barrier fixing member through the stepped portion between the adjacent inner primary plywoods, but also requires the packing material to be seated only on the stepped portion, The consumption of packing materials can be reduced.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention do not have a reinforcing member such as a stiffener on the rear surface of the barrier fixing member, thereby reducing the weight of the barrier fixing member itself, and attaching the reinforcing member It is possible to reduce welding man-hours and increase the degree of welding by not performing welding for manufacturing, and by evenly distributing the stress generated in the bent part at right or obtuse angles, it is bent compared to general barrier fixing members equipped with existing stiffeners. The stability of the system can be improved by reducing the frequency of damage in the damaged part and minimizing repair.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention have a chamfer or groove shape as a squeeze-out check means in each of the outer primary plywood and the corner second connection plywood, which are the lower layers of each of the upper block and the upper connection block. By applying, it is possible to reduce the weight of each of the upper block and upper connection block, and after applying the adhesive on each of the upper block and upper connection block, the adhesive to be squeezed out can be directly checked with the naked eye, thereby increasing the stability of the system. can

In addition, the liquefied gas storage tank and a ship equipped with the same according to the present invention have a first step space between the inner primary plywood of the neighboring upper block as well as the corner of the inner primary plywood of the upper block and the upper connection block. By providing a stuffing piece inserted into the second step space created between the first connecting plywoods, it is possible to keep the gap interval between neighboring upper blocks and between the upper blocks and the upper connecting block constant, as well as , It is possible to fix the inner bent part of the upper block and the corner connection bent part of the upper connection block, so that handling during the upper block operation can be facilitated.

In addition, in the liquefied gas storage tank and the ship equipped with the same according to the present invention, the bonding prevention member is installed on the exposed surface of each of the corner connection bent part and the corner connection insulation material, which are non-bonding areas in the upper connection block, or the non-bonding area of the upper connection block. The exposed surface of the corner connection barrier of the lower block, which is in contact with the corner connection bend, which is the bonding area, and the inner bend of the upper block adjacent to the corner connection insulation, which is the non-bonding area of the upper connection block, and the exposed surface of each of the corner primary insulation By installing, during the bonding of the upper connection block, the adhesive is prevented from escaping to the exposed surface of the corner connection bent part and the corner connection insulation material, which are non-bonding areas, or even if it escapes, the corner connection bent part and the corner connection barrier or corner connection insulation material It is possible to prevent the corner primary insulation material of the upper block adjacent to the bonding from being bonded.

In addition, the liquefied gas storage tank and the ship equipped with the same according to the present invention, after installing the corner block on the corner part and installing the flat block on the flat part, the corner block and the flat block by the tolerance of the tank hull By filling the inside of the gap generated at the contacting portion by using a spray device in a heat insulating material spraying method, it is possible to facilitate filling the gap having an irregular size.

1 is a partial cross-sectional view of a flat portion for explaining a liquefied gas storage tank according to a first embodiment of the present invention.
2 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a first embodiment of the present invention.
3 is a view showing structural analysis results for a corner portion of a liquefied gas storage tank according to a first embodiment of the present invention.
4 is a view showing another structural analysis result for a corner portion of a liquefied gas storage tank according to a first embodiment of the present invention.
5 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a second embodiment of the present invention.
6 is a view showing structural analysis results for a corner portion of a liquefied gas storage tank according to a second embodiment of the present invention.
7 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a third embodiment of the present invention.
8 is a view showing structural analysis results for a corner portion of a liquefied gas storage tank according to a third embodiment of the present invention.
9 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a fourth embodiment of the present invention.
10 is a view showing structural analysis results for a corner portion of a liquefied gas storage tank according to a fourth embodiment of the present invention.
11 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a fifth embodiment of the present invention.
12 is a view showing structural analysis results for a corner portion of a liquefied gas storage tank according to a fifth embodiment of the present invention.
13 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a sixth embodiment of the present invention.
14 is a diagram showing structural analysis results for a corner portion of a liquefied gas storage tank according to a sixth embodiment of the present invention.
15 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a seventh embodiment of the present invention.
16 is a view showing structural analysis results for a corner portion of a liquefied gas storage tank according to a seventh embodiment of the present invention.
17 is a partial front view of a corner portion for explaining a liquefied gas storage tank according to an eighth embodiment of the present invention.
18 is a partial front view of a corner portion for explaining a liquefied gas storage tank according to a ninth embodiment of the present invention.
19 is a perspective view for explaining the upper block of FIG. 18;
20 is a perspective view for explaining the upper connection block of FIG. 18;
21 is an exploded perspective view of the upper block of FIG. 19;
22 is a cross-sectional view of the upper block of FIG. 19;
23 is a cross-sectional view showing another embodiment of the upper block of FIG. 19;
24 is a perspective view for explaining the stuffing piece of FIG. 18;
25 is a view for explaining an anti-bonding member applied to the upper connection block of FIG. 18;
26 is a view for explaining another embodiment of an anti-bonding member applied to the upper connection block of FIG. 18;
(a) and (b) of FIG. 27 are views for explaining another embodiment of the upper block and upper connection block of FIG. 18 .
28 is a partial enlarged front view of a corner portion to which the upper block and upper connection block of FIG. 27 are applied.
29 (a) and (b) are diagrams for explaining another embodiment of the upper block and upper connection block of FIG. 18. Referring to FIG.
30 is a partially enlarged front view of a corner portion to which the upper block and upper connection block of FIG. 29 are applied.
31 (a) and (b) are views showing structural analysis results for each of the barrier fixing member of this embodiment without a stiffener and the barrier fixing member of a comparative example provided with a stiffener.
Figures 32 (a) and (b) are structural analysis results for the component (plywood) provided on the lower side of the barrier fixing member of this embodiment without a stiffener and the barrier fixing member of a comparative example equipped with a stiffener. is a drawing showing
33 is a view for explaining a liquefied gas storage tank according to a tenth embodiment of the present invention.

Objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In adding reference numerals to components of each drawing in this specification, it should be noted that the same components have the same numbers as much as possible, even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

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

In addition, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. And, among the terms used throughout the specification, the term 'outside' refers to the outside of the tank based on the liquefied gas storage tank, and the term 'inside' refers to the inside of the tank based on the liquefied gas storage tank reveal

Hereinafter, in the present specification, liquefied gas may be used to encompass all gaseous fuels that are generally stored in a liquid state, such as LNG or LPG, ethylene, and ammonia. can be expressed as This can be applied to boil-off gas as well. In addition, for convenience, LNG can be used to encompass not only NG (Natural Gas) in a liquid state but also LNG in a supercritical state. can

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

1 is a partial cross-sectional view of a flat portion for explaining a liquefied gas storage tank according to a first embodiment of the present invention, and FIG. 2 is a corner portion for explaining a liquefied gas storage tank according to a first embodiment of the present invention. 3 is a view showing structural analysis results for the corner of the liquefied gas storage tank according to the first embodiment of the present invention, and FIG. 4 is the corner of the liquefied gas storage tank according to the first embodiment of the present invention. It is a drawing showing the result of another structural analysis for the part.

Although not shown, the ship equipped with the liquefied gas storage tank 1 described below is a concept encompassing offshore structures that perform specific tasks by floating at a certain point in the sea in addition to commercial ships that transport cargo from the departure point to the destination. let me know In addition, in the present invention, the liquefied gas storage tank 1, it is revealed that any type of tank for storing liquefied gas is included.

The liquefied gas storage tank 1 is provided on a ship to store liquefied gas such as LNG, which is a cryogenic (about -160 ° C to -170 ° C) material, and may include a flat structure and a corner structure. For example, the horizontal walls in the front and rear directions of the liquefied gas storage tank 1, the floor between the horizontal walls, the vertical walls, and the ceiling may correspond to a planar structure. Also, for example, a structure in which a horizontal wall, a floor, a vertical wall, and a ceiling of the liquefied gas storage tank 1 meet may correspond to a corner structure. Here, the corner structure may include an obtuse corner structure or a right angle corner structure. When the thickness of the primary insulating thermal wall 3 or the secondary insulating thermal wall 5 is changed, the obtuse corner structure or the right angle corner structure may be changed.

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1, as shown in FIG. , It may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

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

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

In such a liquefied gas storage tank 1, it may be necessary to optimize the thickness of the first insulating heat wall 3 and the second insulating heat wall 5 in order to optimize insulation performance and storage capacity. For example, when polyurethane foam is used as the main material of the first and second insulating walls (3) and the second insulating walls (5), the total thickness of the first and second insulating walls (5) is 250 mm. to 500 mm, and in the case of the present embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the secondary insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

That is, in the case of the existing liquefied gas storage tank, compared to the fact that the thickness of the first insulation heat wall in the flat block and the corner block has a thickness that is about 1/3 thinner than the thickness of the second insulation heat wall, in this embodiment, the flat block and the corner block In , the thickness of the first insulating wall 3 and the thickness of the second insulating wall 5 are the same or similar, the reason for which will be clarified later.

Referring to Figure 1, the flat portion of the liquefied gas storage tank 1 according to the first embodiment of the present invention will be described first. The flat part of the liquefied gas storage tank 1 is made of a combination of a plurality of flat blocks, and the configuration of the flat block of the liquefied gas storage tank 1 described below is not only the first embodiment but also the second embodiment to be described later. It is revealed in advance that the same applies to the eighth embodiment.

As shown in FIG. 1, the flat block of the liquefied gas storage tank 1 is disposed on a flat part on the first or second surface at different angles forming a storage space for accommodating the liquefied gas, and is made of metal. The flat primary barrier 2a is fixed and the flat primary barrier wall 3a disposed outside the flat primary barrier 2a and the flat secondary barrier 41a provided on the outside of the primary flat barrier barrier 3a ), and a flat secondary insulating wall 5a disposed outside the flat secondary barrier 41a.

The flat primary barrier (2a) is disposed on a flat portion on the first or second surface at different angles to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. For example, the metal material may be stainless steel, but is not limited thereto. The flat primary barrier (2a), together with the flat secondary barrier (41a) can prevent the liquefied gas from leaking to the outside.

The flat primary barrier 2a is fixedly coupled to the upper portion of the flat primary thermal insulation wall 3a by a metal strip (not shown), and is in direct contact with liquefied gas, which is a cryogenic substance stored in the liquefied gas storage tank 1. can be installed as much as possible.

This flat primary barrier (2a) seals the flat primary insulating wall (3a) and the corner primary barrier (2b) illustrated in FIG. 2 when the flat block and the corner block shown in FIG. 2 are adjacently arranged and connected. .

The flat primary barrier wall (3a) 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 the flat primary barrier (2a) and the flat secondary barrier It may be installed between the barriers 41a.

The flat primary insulating wall (3a) may have a structure in which a flat primary plywood (31a) and a flat primary thermal insulation material (32a) are sequentially laminated to the outside of the flat primary barrier (2a), and the flat primary ply The thickness of the combined thickness of the wood (31a) and the thickness of the flat primary insulation (32a), for example, may be formed of a thickness of 160mm to 250mm, but is not limited thereto.

The flat primary plywood (31a) may be installed between the flat primary barrier (2a) and the flat primary insulation (32a).

The flat primary insulation material 32a is formed of a material having excellent thermal insulation performance and excellent mechanical strength so as to withstand an impact from the outside or an impact caused by liquefied gas sloshing from the inside while blocking heat intrusion from the outside. can

The flat primary insulating material 32a may be formed of polyurethane foam between the flat primary plywood 31a and the flat secondary barrier 4a, and occupies most of the thickness of the flat primary thermal insulation wall 3a.

The flat primary insulating wall 3a is a part of a flat block along with the flat secondary barrier 41a and the flat secondary insulating wall 5a, and the flat primary insulating wall 3a constituting the flat block is another component of the flat block. It may have a smaller width than the width of the in-flat secondary insulation thermal wall 5a. Due to this, a part of the flat secondary barrier 41a may be exposed on both sides of the flat primary thermal insulation wall 3a. When a plurality of flat blocks are arranged adjacently, a flat connection insulating wall 33a is installed in the space between the adjacent flat primary insulating walls 3a, that is, in the space where the flat secondary barrier 41a is exposed. It can be.

The flat connection insulation wall 33a is disposed between neighboring flat primary insulation walls 3a when flat blocks are disposed adjacent to each other, and is the same as or similar to the flat primary insulation wall 3a. and the flat connection insulating material 332a may be provided in a laminated form, and have the same or similar thickness as the flat primary insulating wall 3a.

When a plurality of flat blocks are arranged adjacent to each other, the flat connection insulation wall 33a seals the space between adjacent flat secondary insulation walls 5a together with the flat connection barrier 42a from the outside. It is installed to perform a role of blocking the heat intrusion of.

The flat secondary barrier 41a may be installed between the flat primary barrier wall 3a and the flat secondary barrier barrier 5a, and together with the flat primary barrier 2a, prevent liquefied gas from leaking to the outside. can

The flat secondary barrier 41a is a partial configuration of a flat block together with the flat primary thermal barrier wall 3a and the flat secondary thermal barrier barrier 5a, and when the flat block is adjacently arranged, the adjacent flat secondary barrier 41a may be connected by a flat connection barrier 42a.

The flat connection barrier 42a may connect neighboring flat secondary barriers 41 exposed to the outside when the flat blocks are adjacently disposed, and a flat connection insulation wall 33a may be installed on the top.

The flat secondary insulating wall 5a, along with the flat primary insulating wall 3a and the flat connection insulating wall 33a, blocks heat intrusion from the outside while preventing shock from the outside or impact caused by liquefied gas sloshing from the inside. It can be designed to withstand. In addition, the flat secondary insulating wall (5a) may be installed between the flat secondary barrier (4a) and the hull (7), and may be configured to include a flat secondary insulating material (51a) and a flat secondary plywood (52a). can

The flat secondary insulating wall 5a may have a structure in which a flat secondary insulating material 51a and a flat secondary plywood 52a are sequentially laminated to the outside of the flat secondary barrier 41a, and the flat secondary insulating material The total thickness of (51a) and the thickness of the flat secondary plywood (52a) combined, for example, may be formed of 150 mm to 240 mm, which is the same as or similar to the thickness of the flat primary thermal insulation wall (3a), limited thereto It is not.

The flat secondary insulation material 51a is formed of a material having excellent thermal insulation performance and excellent mechanical strength so as to withstand an impact from the outside or an impact caused by liquefied gas sloshing from the inside while blocking heat intrusion from the outside. can

The flat secondary insulation material 51a may be formed of polyurethane foam between the flat secondary barrier 41a and the flat secondary plywood 52a, and occupies most of the thickness of the flat secondary insulation wall 5a.

The flat secondary plywood 52a may be installed between the flat secondary insulation 51a and the hull 7.

As described above, in the flat block of the liquefied gas storage tank 1 according to the present embodiment, the flat connection insulating wall 33a encompassed by the flat primary insulating wall 3a has the thickness and thickness of the flat secondary insulating wall 5a. It can be configured to have the same or similar thickness. To be associated with this configuration, the flat connection insulation 332a of the flat connection insulation wall 33a has a thickness of 90% to 110% of the flat secondary insulation 51a, flat connection of the flat connection insulation wall 33a The insulator 332a may be configured to have the same or similar thickness as the flat secondary insulator 51a.

That is, in the case of the existing liquefied gas storage tank, compared to the fact that the thickness of the first insulation wall in the flat block has a thickness that is about 1/3 thinner than the thickness of the second insulation wall, in this embodiment, the flat primary insulation wall in the flat block ( The thickness of 3a) and the thickness of the flat secondary insulating wall 5a were identical or similar, which is to prevent damage to the flat secondary insulating wall 41a due to low-temperature stress.

In general, the flat secondary barrier 41a and the flat secondary thermal insulation wall 5a have a difference in self-shrinkage depending on the temperature to which they are exposed. In the case of the flat secondary barrier 41a and the flat secondary thermal barrier 5a, As the thickness of the flat connection insulating wall 33a becomes thinner, it may be more affected by the cooling heat of the cryogenic liquefied gas. In addition, in this case, there is a problem that the risk of damage to the flat secondary barrier 41a increases due to an increase in stress at a low temperature because the temperature of itself decreases and the amount of shrinkage itself increases. This problem may occur particularly in the flat connection barrier 42a that connects the flat secondary barrier 41a to each other by bonding or the like under the flat connection insulation wall 33a. At the bottom of the flat connection insulation wall 33a, the flat connection barrier 42a is connected to the flat secondary barrier 41a of a plurality of flat blocks adjacently arranged at both ends, and the flat secondary insulation wall 5a of the flat block contracts. This is because both ends of the flat connection barrier 42a can be deformed so as to move away from or approach each other.

In this embodiment, the flat first insulating wall 3a and the flat second insulating wall 5a covering the flat connecting insulating wall 33a are formed to have the same or similar thickness, thereby covering the flat connecting insulating wall 33a. As the thickness of the primary insulating wall (3a) is relatively thicker than before, the cryogenic load of the flat secondary barrier (41a) as well as the flat connection barrier (42a) is reduced, and also the flat secondary insulating wall (5a) As the thickness is relatively thinner compared to the existing ones, the amount of shrinkage itself is reduced, thereby reducing stress at low temperatures. As a result, the risk of damage to the secondary barrier 4 in a portion where a plurality of flat blocks are disposed adjacent to each other is relatively lower than before.

Referring to FIG. 2, the corner portion of the liquefied gas storage tank 1 according to the first embodiment of the present invention will be described. The corner portion of the liquefied gas storage tank 1 may be formed of a combination of a plurality of corner blocks. The corner structure of the liquefied gas storage tank 1 described below is described as an example of an obtuse corner structure forming an angle of 135 degrees, but is not limited to numerical values.

As shown in FIG. 2, the corner block of the liquefied gas storage tank 1 is disposed at a corner portion where the first and second surfaces of different angles forming a storage space for accommodating liquefied gas meet, and metal The corner primary barrier wall (2b) is fixed and the corner primary barrier wall (3b) disposed outside the corner primary barrier wall (2b) and the corner primary barrier barrier (3b) provided outside the corner primary barrier barrier (3b) 41b), and a corner secondary insulating wall 5b disposed outside the secondary corner barrier 41b. Here, the corner primary insulating wall 3b may further include an inward bent portion 3b3.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside.

Although not shown in FIG. 2, the corner primary barrier 2b is placed on the corner primary thermal insulation wall 3b by a barrier fixing member installed in various ways such as bonding or bolting to the upper end of the corner primary thermal insulation wall 3b. It is fixedly coupled and can be installed in direct contact with liquefied gas, which is a cryogenic material stored in the liquefied gas storage tank (1). Accordingly, the corner primary barrier 2b mentioned below may be used as a meaning including a barrier fixing member and the like.

This corner primary barrier (2b) is capable of sealing the corner primary barrier wall (3b) and the flat primary barrier (2a) illustrated in FIG. 1 when the corner block and the flat block shown in FIG. It is fixed to the inner primary plywood 31b of the inner first fixing part 3b1 and the inner primary plywood 31b of the inner second fixing part 3b2, and the heat insulating material of the inner bent part 3b3 ( 3b31) may be provided to be bent at a certain angle, for example, at an angle of 135 degrees.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b.

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b), the corner primary insulating material (32b) to the outside of the corner primary barrier wall (2b), The outer primary plywood 33b may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure.

Here, the inner first fixing part 3b1 is fixed to the outer first fixing part 5b1 and provided on the inside of the first surface, and the inner second fixing part 3b2 is fixed to the outer second fixing part 5b2. It can be provided on the inside of the second surface,

In addition, the corner primary insulating wall 3b may include an inward bent portion 3b3 formed by filling a heat insulating material 3b31 between the first inner fixing portion 3b1 and the second inner fixing portion 3b2.

The corner primary insulating wall 3b has a thickness of the sum of the thickness of the inner primary plywood 31b, the thickness of the corner primary insulating material 32b, and the outer primary plywood 33b, as described above. It may be the same as the thickness of the thermal wall 3a (eg, 160 mm to 250 mm).

The inner primary plywood (31b) may be installed between the corner primary barrier wall (2b) and the corner primary insulation material (32b).

In this embodiment, as described above, since the first insulating wall 3 in the flat block and the corner block is formed to be relatively thicker than the existing first insulating wall, the corner first insulating wall 3b of the corner block is formed. To reduce the thickness of the inner primary plywood (31b), the remaining thickness can be replaced with a corner primary insulation (32b) formed of polyurethane foam.

The thickness of the inner primary plywood 31b of this embodiment may be 20 mm to 80 mm.

In this way, in this embodiment, the inner first and second fixing parts 3b1 and 3b2 for holding the barrier fixing member to which the corner primary barrier 2b is fixed in the corner block are plywood having a thickness of about 92 mm as before. By forming a combination with the corner primary insulation (32b) of polyurethane foam instead of consisting only of polyurethane foam, it is possible to improve insulation performance, reduce weight, and reduce cost compared to the existing plywood alone. there is.

The corner primary insulation material 32b may be disposed between the inner primary plywood 31b and the outer primary plywood 33b, and block heat intrusion from the outside while impacting from the outside or liquefying from the inside. It may be formed of high-density polyurethane foam, which is a material with excellent thermal insulation performance and excellent mechanical strength, so as to withstand the impact caused by gas sloshing.

The outer primary plywood (33b) may be disposed between the corner primary insulation material (32b) and the corner secondary barrier (41b), and may be fixed to the corner secondary barrier (41b).

The outer primary plywood 33b may be formed with a thickness of 6.5 mm to 15 mm, preferably 12 mm.

As described above, the corner primary insulating wall 3b of this embodiment is composed of a structure in which the inner primary plywood 31b, the corner primary insulating material 32b, and the outer primary plywood 33b are sequentially stacked Accordingly, the inner primary plywood 31b and the outer primary plywood 33b, which have high strength, hold the heat shrinkage of the corner primary insulation material 32b, so that the outer first and second fixing parts 5b1 and 5b2 The inner primary ply sensitive to humidity is prevented from directly applying the heat shrinkage of the corner primary insulation material 32b to the secondary barriers 4, 41b, and 42b, and the corner primary insulation material 32b is provided as an intermediate layer. It is possible to easily manage the tolerance of the wood 31b and the outer primary ply wood 33b.

The inner first and second fixing parts 3b1 and 3b2 composed of the corner primary insulating wall 3b, respectively, are the outer first and second fixing parts composed of the corner secondary insulating wall 41b and the corner secondary insulating thermal wall 5b. (5b1, 5b2), respectively, the width of each of the inner first and second fixing parts 3b1 and 3b2 may have a smaller width than the width of each of the outer first and second fixing parts 5b1 and 5b2. As a result, when a plurality of corner blocks are adjacently arranged along the side of the corner portion where the first and second surfaces of different angles face each other, between the inner first and second fixing parts 3b1 and 3b2 adjacently arranged An inward bent portion 3b3 may be formed in a space portion of, that is, a space portion in which the corner secondary barrier 41b is exposed.

The inside bent portion 3b3 may be configured by filling the heat insulating material 3b31.

The insulator 3b31 of the inner bent portion 3b3 may be low-density polyurethane foam, and the corner secondary barrier 41b and the corner connection barrier 42b are laminated on the outer surface bent at a certain angle, for example, at an angle of 135 degrees. A secondary barrier 4 may be provided.

The insulator 3b31 of the inner bent part 3b3 forms a corner connection barrier between the outer first and second fixing parts 5b1 and 5b2 when a plurality of corner blocks are adjacently arranged. While sealing together with (42b), it can play a role of blocking heat intrusion from the outside.

The corner secondary barrier 41b may be provided on the outside of the corner primary thermal insulation wall 3b. The corner secondary barrier 41b may be installed between the corner primary barrier wall 3b and the corner secondary barrier barrier 5b, and together with the corner primary barrier 2b, prevent liquefied gas from leaking to the outside. can

The corner secondary barrier 41b is a part of the corner block along with the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b, and when the corner block is adjacently disposed, the outer first and second fixing portions 5b1 , 5b2), the corner secondary barriers 41b neighboring between them may be connected by the corner connection barriers 42b.

The corner connection barrier 42b can connect the neighboring corner secondary barrier 41b exposed to the outside when the corner block is adjacently arranged, and the insulation material 3b31 of the inner bend 3b3 is installed on the top , It can play a role of blocking heat intrusion from the outside by sealing the space portion formed between the heat insulating material 3b31 of the inner bent part 3b3 and the outer first and second fixing parts 5b1 and 5b2 disposed adjacent to each other. . In this embodiment, the corner connection barrier 42b is formed to extend not only between the inner first and second fixing parts 3b1 and 3b2, but also to overlap at least the inner first and second fixing parts 3b1 and 3b2. can

At the point where the outer first and second fixing parts 5b1 and 5b2 meet, the secondary barrier 4 in which the corner secondary barrier 41b and the corner connection barrier 42b are stacked may be provided to be bent.

The corner secondary barrier barrier 5b may be disposed outside the secondary corner barrier 41b. The corner secondary thermal insulation wall 5b, together with the corner primary thermal insulation wall 3b and the insulator 3b31 of the inside bent portion 3b3, blocks heat intrusion from the outside while impacting from the outside or sloshing liquefied gas from the inside. It can be designed to withstand the impact caused by In addition, the corner secondary insulation wall (5b) may be installed between the corner secondary barrier (4b) and the hull (7), and the inner secondary plywood (51b), the corner secondary insulation (52b), and the outer secondary ply It may be configured to include a wood (53b).

The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may include an outer first fixing part 5b1 and an outer second fixing part 5b2 composed of a sequentially stacked structure.

Here, the outer first fixing part 5b1 may be fixed to the inner side of the first surface, and the outer second fixing part 5b2 may be fixed to the inner side of the second surface.

Sides facing the outer first fixing part 5b1 fixed to the first surface and the outer second fixing part 5b2 fixed to the second surface may be inclined in a direction ED for equally dividing the corner portion. there is. In this embodiment, it is described that the corner portion is evenly divided, but it is not limited thereto, and since the corner portion may not be evenly divided according to the corner position, the corner portion may be provided inclined in the direction (ED) for unevenly dividing the corner portion.

In this corner secondary insulating wall 5b, the total thickness of the thickness of the inner secondary plywood 51b, the thickness of the corner secondary insulating material 52b, and the thickness of the outer secondary plywood 53b is the same as the above-mentioned flat 2 It may be the same as the thickness of the blocking thermal wall 5a (eg, 150 mm to 240 mm thick).

The inner secondary plywood 51b may be disposed between the corner secondary barrier 2b and the corner secondary insulation material 51b, and the corner secondary barrier 2b may be fixed. The inner secondary plywood 51b may be formed to a thickness of 6.5 mm to 15 mm.

The corner secondary insulation material 52b is formed of a material having excellent thermal insulation performance and excellent mechanical strength so as to withstand an impact from the outside or an impact caused by liquefied gas sloshing from the inside while blocking heat intrusion from the outside. can

The corner secondary insulation material 52b may be formed of polyurethane foam between the inner secondary plywood 51b and the outer secondary plywood 53b, and occupies most of the thickness of the corner secondary insulation wall 5b. .

The outer secondary plywood 53b may be installed between the corner secondary insulation 52b and the hull 7. The outer secondary plywood 53b may be formed to a thickness of 6.5 mm to 25 mm.

In the liquefied gas storage tank 1 according to the present embodiment described above, as the thickness of the first insulating thermal wall 3 is relatively thicker than before, the secondary barrier 4 in the corner block as well as the flat block is the hull ( 7) The radius of curvature increases as it moves to the side, and in this case, the radius of curvature of the secondary barrier 4 increases at the corner portion, where the secondary barrier 4 is non-adhered to the secondary insulation wall 5 length also increases. This means that the flexibility of the secondary barrier 4 increases in the obtuse corner structure, whereby the secondary barrier 4 in the obtuse corner structure facilitates absorbing peripheral deformation, for example, hull deformation, and reduces low-temperature stress. will do In the case of this embodiment, the length of the non-adhesive portion may be, for example, 0 mm to 100 mm, preferably 50 mm to 100 mm.

As described above, the secondary barrier 4 in the obtuse corner structure of the present invention has a low temperature applied to the existing secondary barrier 4 compared to the obtuse corner structure of the first insulating thermal wall 3 formed with a relatively thin thickness. stress can be reduced. In addition, since the non-adhesive portion increases, it is also easy to absorb hull deformation.

This was proven through structural analysis results of the corner portion of the liquefied gas storage tank 1 according to the present embodiment in FIGS. 3 and 4 .

As for the structural analysis conditions, heat transfer analysis was performed at 20°C at the hull location and 163°C at the primary barrier, and the structural analysis was performed using the resulting temperature distribution.

In addition, in the existing liquefied gas storage tank for comparison of the results obtained by the structural analysis of the liquefied gas storage tank 1 according to this embodiment, the thickness of the first insulation wall in the flat block and the corner block is approximately less than the thickness of the second insulation wall. It has a thickness that is about 1/3 thin, and the fixing member corresponding to the inner first and second fixing parts 3b1 and 3b2 is composed of only plywood, and the length of the non-adhesive part is 50mm, and this existing liquefied gas storage In the tank, the YY direction stress value of the bent portion of the secondary barrier was about 66.8984 MPa, and the temperature was about -135.857 °C.

The stress value in the YY direction obtained as a result of structural analysis is the stress value at the corner, the lower the stress, the lower the stress, and the higher the temperature, the lower the stress.

It should be noted in advance that the above conditions apply equally to the structural analysis of the liquefied gas storage tank 1 according to the second to seventh embodiments to be described later as well as the present embodiment.

3 is a YY direction of the secondary barriers 4, 41b, 42b in the portion where the outer first and second fixing parts 5b1 and 5b2 face each other and are bent when the length of the non-adhesive part is 50 mm in this embodiment. As a result of structural analysis of the stress value and temperature distribution, the YY direction stress value was 37.155 MPa and the temperature was -57.940 °C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

Figure 4 is the YY direction of the secondary barriers (4, 41b, 42b) in the portion where the outer first and second fixing parts (5b1, 5b2) are bent facing each other when the length of the non-adhesive part is 97 mm in this embodiment. As a result of structural analysis of the stress value and temperature distribution, the YY direction stress value was 12.084 MPa and the temperature was -59.025 °C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

Through this, in this embodiment, the inner first and second fixing parts 3b1 and 3b2 for holding the barrier fixing member to which the corner primary barrier 2b is fixed in the corner block are not configured only with plywood, but are made of polyurethane foam. By forming the structure in combination with the heat insulating material (3b31), it is possible to improve the heat insulating performance, reduce the weight, and reduce the cost compared to the existing plywood only.

In addition, in this embodiment, the corner primary insulating wall 3b of the corner block connected to the flat primary insulating thermal wall 3a of the flat block and the corner secondary blocking of the corner block connected to the flat secondary insulating thermal wall 5a of the flat block By configuring the same or similar thickness of the thermal wall (5b), the thickness of the corner first insulating thermal wall (3b) is relatively thick compared to the existing one (however, the thickness of the corner secondary insulating thermal wall (5b) maintains the mechanical strength at a certain level). It is possible to reduce the low temperature burden and the sloshing burden of the secondary barriers 4, 41b, 42b between the outer first and second fixing parts 5b1 and 5b2, and the secondary barriers 4, 41b, Not only can damage to 42b) be prevented, but also brittle fracture of the hull 7 can be prevented by reducing the low-temperature load of the secondary barriers 4, 41b, and 42b.

In addition, in this embodiment, the thickness of the corner primary insulating wall 3b is configured to be relatively thicker than before, so that the length of the portion where the secondary barriers 4, 41b, and 42b are not adhered to the corner secondary insulating wall 5b. can be increased, and the damage probability of the secondary barriers 4, 41b, 42b can be further reduced due to the increase in flexibility of the secondary barriers 4, 41b, 42b, and the secondary barrier 4 , 41b, 42b) facilitates hull deformation absorption and can further reduce low-temperature stress.

5 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a second embodiment of the present invention, and FIG. 6 is a structural analysis result of a corner portion of a liquefied gas storage tank according to a second embodiment of the present invention. is a drawing showing

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 of this embodiment may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1 is shown in FIG. As shown in, it may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

In the liquefied gas storage tank 1 of this embodiment, the configuration of the flat block is the same as or similar to the configuration described above with reference to FIG. 1 . That is, as shown in FIG. 1, the flat block of the liquefied gas storage tank 1 of this embodiment is formed on a flat part on the first or second surface at different angles forming a storage space for accommodating liquefied gas. A flat primary insulating wall (3a) disposed outside the flat primary barrier wall (2a) while fixing the flat primary barrier wall (2a) made of metal, and a flat primary thermal insulation wall (3a) provided outside the flat primary thermal barrier wall (3a). A secondary barrier 41a and a flat secondary barrier 5a disposed outside the flat secondary barrier 41a may be included.

Accordingly, a detailed description of the flat block configuration of the liquefied gas storage tank 1 is omitted here in order to avoid redundant description. Hereinafter, the configuration of the corner block of the liquefied gas storage tank 1 of this embodiment will be described in detail with reference to FIGS. 1 and 5.

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

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block. In the case of the present embodiment, as described in the first embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the second insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

As shown in FIG. 5, the corner portion of the liquefied gas storage tank 1 according to the second embodiment of the present invention may be formed of a combination of a plurality of corner blocks. The corner structure of the liquefied gas storage tank 1 described below may be an obtuse corner structure having a predetermined angle, for example, an angle of 135 degrees.

The corner block of the liquefied gas storage tank (1) is disposed at a corner portion where the first and second surfaces of different angles form a storage space for accommodating liquefied gas, and a corner primary barrier (2b) made of metal. ) is fixed and the corner primary insulating wall (3b) disposed outside the corner primary barrier wall (2b), the corner secondary barrier wall (41b) provided outside the corner primary thermal barrier wall (3b), and the corner secondary barrier (41b) may include a corner secondary insulation column wall (5b) disposed outside.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside.

The corner primary barrier 2b of this embodiment is basically the same as or similar to that of the first embodiment described above, and a detailed description thereof is omitted here. However, the corner primary barrier wall (2b) of this embodiment may have a different bending angle as the configuration of the corner primary thermal insulation wall (3b) is different from that of the first embodiment. I will mention it when explaining.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b. In the configuration of the corner primary insulating wall 3b of this embodiment, compared to the first embodiment described above, the outer primary plywood 33b is omitted, and the inward bent portion 3b3 formed by filling the heat insulating material 3b31 is The same or similar bar except that the configuration of the arranged part is different, and here, the different configuration will be mainly described.

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b) and the corner primary insulating material (32b) are provided to the outside of the corner primary barrier wall (2b). It may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure. Here, the inner primary plywood 31b and the corner primary insulation 32b of this embodiment may be the same as or similar to those of the first embodiment described above, and thus, detailed descriptions are omitted to avoid redundant description. .

The inner first fixing part 3b1 is 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 is fixed to the outer second fixing part 5b2. It may be provided on the inside of the two sides,

In addition, the corner primary insulating wall 3b may include an inner intermediate fixing part 3b12 provided between the first inner fixing part 3b1 and the second inner fixing part 3b2.

The inner intermediate fixing part (3b12) is disposed on the inner side of the corner intermediate insulating material (32b12) and the corner intermediate insulating material (32b12) fixed to the corner connecting barrier (42b) connecting the neighboring corner secondary barrier (41b), and the corner It may include an inner intermediate plywood (31b12) to which the primary barrier (2b) is fixed.

The inner intermediate plywood 31b12 may be formed in the same or similar structure as the inner primary plywood 31b, and the corner primary barrier 2b may be fixed together with the inner primary plywood 31b. .

The inner intermediate plywood 31b12 may be parallel to a direction perpendicular to the direction ED for equal division when equally dividing the corner portion. However, of course, the inner intermediate plywood 31b12 may not be parallel to the direction perpendicular to the direction ED in which the corner portion is divided when the corner portion is unevenly divided.

The corner middle insulation material 32b12 may be formed of the same or similar material as the corner primary insulation material 32b. The middle corner insulation material 32b12 may be formed of high-density polyurethane foam.

When a plurality of corner blocks are arranged adjacent to each other, the corner middle insulation material 32b12 forms a space between the first and second outer fixing parts 5b1 and 5b2 adjacently disposed together with the corner connection barrier 42b. While sealing, it can play a role of blocking heat intrusion from the outside. In this embodiment, the corner connection barrier 42b is formed to extend not only between the inner first and second fixing parts 3b1 and 3b2, but also to overlap at least the inner first and second fixing parts 3b1 and 3b2. can

Since the inner intermediate plywood 31b12 is provided between the first inner fixing part 3b1 and the second inner fixing part 3b2, the corner primary barrier 2b is formed on the inner side 1 of the first inner fixing part 3b1. It is fixed to the secondary plywood 31b, the inner intermediate plywood 31b12 of the inner intermediate fixing portion 3b12 and the inner primary plywood 31b of the inner second fixing portion 3b2, and the inner first fixing portion ( 3b1) and the inner intermediate fixing portion 3b12 and between the inner intermediate fixing portion 3b12 and the inner second fixing portion 3b2 in an angle range of 150 degrees to 160 degrees.

Through this, in this embodiment, a predetermined distance is spaced between the inner first fixing part 3b1 and the inner second fixing part 3b2 provided on the inside of the first and second surfaces at different angles, and the inner second By providing the inner intermediate fixing part 3b12 between the 1 and 2 fixing parts 3b1 and 3b2, it is possible to alleviate the bending angle of the corner primary barrier 2b by the inner intermediate fixing part 3b12. Not only can the burden of sloshing on the primary barrier 2b be reduced, but also the mechanical strength of the corner portion can be increased.

The corner secondary barrier 41b may be installed between the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b, and when the corner block is adjacently disposed, the outer first and second fixing portions 5b1 and 5b2 ) The corner secondary barriers 41b adjacent to each other may be connected by the corner connection barrier 42b, and together with the corner primary barrier 2b, it is possible to prevent leakage of liquefied gas to the outside. The corner secondary barrier 41b of this embodiment is the same as or similar to that of the first embodiment described above, and thus a detailed description thereof is omitted to avoid redundant description.

The corner secondary insulating wall 5b may include an inner secondary plywood 51b, a corner secondary insulating material 52b, and an outer secondary plywood 53b. The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may include an outer first fixing part 5b1 and an outer second fixing part 5b2 composed of a sequentially stacked structure.

The corner secondary insulating wall 5b of this embodiment is the same as or similar to that of the first embodiment described above, and thus a detailed description thereof is omitted to avoid redundant description.

Figure 6 is a result of structural analysis of the YY direction stress value and temperature distribution of the secondary barriers (4, 41b, 42b) in the portion where the outer first and second fixing parts (5b1, 5b2) face each other and are bent, in the YY direction. The stress value was 10.982 MPa, and the temperature was -67.914 °C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

7 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a third embodiment of the present invention, and FIG. 8 is a structural analysis result of a corner portion of a liquefied gas storage tank according to a third embodiment of the present invention. is a drawing showing

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 of this embodiment may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1 is shown in FIG. As shown in, it may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

In the liquefied gas storage tank 1 of this embodiment, the configuration of the flat block is the same as or similar to the configuration described above with reference to FIG. 1 . That is, as shown in FIG. 1, the flat block of the liquefied gas storage tank 1 of this embodiment is formed on a flat part on the first or second surface at different angles forming a storage space for accommodating liquefied gas. A flat primary insulating wall (3a) disposed outside the flat primary barrier wall (2a) while fixing the flat primary barrier wall (2a) made of metal, and a flat primary thermal insulation wall (3a) provided outside the flat primary thermal barrier wall (3a). A secondary barrier 41a and a flat secondary barrier 5a disposed outside the flat secondary barrier 41a may be included.

Accordingly, a detailed description of the flat block configuration of the liquefied gas storage tank 1 is omitted here in order to avoid redundant description. Hereinafter, the configuration of the corner block of the liquefied gas storage tank 1 of this embodiment will be described in detail with reference to FIGS. 1 and 7 .

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

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block. In the case of the present embodiment, as described in the first embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the second insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

As shown in FIG. 7, the corner portion of the liquefied gas storage tank 1 according to the third embodiment of the present invention may be formed of a combination of a plurality of corner blocks. The corner structure of the liquefied gas storage tank 1 described below may be an obtuse corner structure having a predetermined angle, for example, an angle of 135 degrees.

In this embodiment, unlike the drawings, the position of the corner primary insulating wall 3b can be positioned so as to expose the corner secondary barrier 41b constructed on the corner secondary insulating wall 5b at the center of the corner. . Therefore, the exposed corner secondary barriers 41b are interconnected with the corner connection barriers 42b and finished, or the corner primary barrier walls 3b are adjacent to each other so as to connect the adjacent corner secondary barriers 41b. Of course, it is also possible to laminate on the corner secondary barrier (41b)/corner connection barrier (42b) after constructing the connection barrier (42b). In this embodiment, the corner connection barrier 42b is formed to extend not only between the inner first and second fixing parts 3b1 and 3b2, but also to overlap at least the inner first and second fixing parts 3b1 and 3b2. can

The corner block of the liquefied gas storage tank (1) is disposed at a corner portion where the first and second surfaces of different angles form a storage space for accommodating liquefied gas, and a corner primary barrier (2b) made of metal. ) is fixed and the corner primary insulating wall (3b) disposed outside the corner primary barrier wall (2b), the corner secondary barrier wall (41b) provided outside the corner primary thermal barrier wall (3b), and the corner secondary barrier (41b) may include a corner secondary insulation column wall (5b) disposed outside.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside.

The corner primary barrier 2b of this embodiment is basically the same as or similar to that of the first embodiment described above, and a detailed description thereof is omitted here.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b. The configuration of the corner primary insulating wall 3b of this embodiment is the same or similar to that of the first embodiment except that the outer primary plywood 33b is omitted, and the different configurations will be mainly described here.

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b) and the corner primary insulating material (32b) are provided to the outside of the corner primary barrier wall (2b). It may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure. Here, the inner primary plywood 31b and the corner primary insulation 32b of this embodiment may be the same as or similar to those of the first embodiment described above, and thus, detailed descriptions are omitted to avoid redundant description. .

The inner first fixing part 3b1 is 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 is fixed to the outer second fixing part 5b2. It may be provided on the inside of the two sides,

In addition, the corner primary insulating wall 3b may include an inward bent portion 3b3 formed by filling a heat insulating material 3b32 between the first inner fixing portion 3b1 and the second inner fixing portion 3b2. The heat insulator 3b32 of the inwardly bent portion 3b3 of this embodiment may be the same as or similar to that of the first embodiment described above, and thus a detailed description thereof will be omitted to avoid redundant description.

The corner secondary barrier 41b may be installed between the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b, and when the corner block is adjacently disposed, the outer first and second fixing portions 5b1 and 5b2 ) The corner secondary barriers 41b adjacent to each other may be connected by the corner connection barrier 42b, and together with the corner primary barrier 2b, it is possible to prevent leakage of liquefied gas to the outside. The corner secondary barrier 41b of this embodiment may have the same or similar basic configuration as that of the first embodiment described above. However, the corner secondary barrier 41b covering the corner connection barrier 42b of the present embodiment may have a different arrangement relationship as some configurations of the corner secondary insulating thermal wall 5b are different from those of the first embodiment described above. However, it will be mentioned when the corner secondary insulation thermal wall 5b is described below.

The corner secondary insulating wall 5b may include an inner secondary plywood 51b, a corner secondary insulating material 52b, and an outer secondary plywood 53b. The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may include an outer first fixing part 5b1 and an outer second fixing part 5b2 composed of a sequentially stacked structure.

Side surfaces of the first outer fixing part 5b1 and the second fixing part 5b2 described above may be provided with an inclination in a direction ED to equally divide the corner portion. In this embodiment, it is described that the corner portion is evenly divided, but it is not limited thereto, and since the corner portion may not be evenly divided according to the corner position, the corner portion may be provided inclined in the direction (ED) for unevenly dividing the corner portion.

The outer first fixing part 5b1 and the outer second fixing part 5b2 may have chamfers formed at corners facing each other.

In addition, the corner secondary insulation wall 5b includes an outer bent portion 5b3 including a heat insulating material 5b31 filled between the chamfer portion of the outer first fixing portion 5b1 and the outer second fixing portion 5b2. can do. The heat insulating material 5b31 of the outer bent portion 5b3 may be a low-density polyurethane foam.

By providing the heat insulating material 5b31 of the outer bent portion 5b3 in the chamfer portion of the outer first fixing part 5b1 and the outer second fixing part 5b2, the corner secondary barrier covering the corner connection barrier 42b ( 41b) is the inner secondary plywood 51b of the outer first fixing part 5b1, the heat insulating material 5b31 of the outer bent part 5b3, and the inner secondary plywood 51b of the outer second fixing part 5b2. ), and may be provided to be bent at a predetermined angle, for example, at an angle of 135 degrees, from the inside of the heat insulating material 5b31 of the outer bent portion 5b3.

Through this, the present embodiment forms a chamfer at the corner where the outer first fixing part 5b1 and the outer second fixing part 5b2, which are respectively fixed to the first and second surfaces at different angles, face each other, and the chamfer Since the heat insulating material 5b31 of the outer bent portion 5b3 made of low density polyurethane foam is provided, the insulation performance can be further increased at the corner by the low density polyurethane foam.

8 is a result of structural analysis of the YY direction stress value and temperature distribution of the secondary barriers 4, 41b, 42b in the portion where the outer first and second fixing parts 5b1 and 5b2 face each other and are bent, in the YY direction. The stress value was 12.003 MPa, and the temperature was -64.358°C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

9 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a fourth embodiment of the present invention, and FIG. 10 is a structural analysis result of a corner portion of a liquefied gas storage tank according to a fourth embodiment of the present invention. is a drawing showing

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 of this embodiment may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1 is shown in FIG. As shown in, it may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

In the liquefied gas storage tank 1 of this embodiment, the configuration of the flat block is the same as or similar to the configuration described above with reference to FIG. 1 . That is, as shown in FIG. 1, the flat block of the liquefied gas storage tank 1 of this embodiment is formed on a flat part on the first or second surface at different angles forming a storage space for accommodating liquefied gas. A flat primary insulating wall (3a) disposed outside the flat primary barrier wall (2a) while fixing the flat primary barrier wall (2a) made of metal, and a flat primary thermal insulation wall (3a) provided outside the flat primary thermal barrier wall (3a). A secondary barrier 41a and a flat secondary barrier 5a disposed outside the flat secondary barrier 41a may be included.

Accordingly, a detailed description of the flat block configuration of the liquefied gas storage tank 1 is omitted here in order to avoid redundant description. Hereinafter, the configuration of the corner block of the liquefied gas storage tank 1 of this embodiment will be described in detail with reference to FIGS. 1 and 9 .

As shown in FIGS. 1 and 9, the liquefied gas storage tank 1 includes a primary barrier 2 in contact with liquefied gas, a primary insulation wall 3 installed outside the primary barrier 2, It may include a secondary barrier 4 installed outside the primary barrier wall 3 and a secondary barrier barrier 5 disposed outside the secondary barrier 4. The liquefied gas storage tank 1 may be supported on the hull 7 by the mastic 6 installed between the secondary insulating wall 5 and the hull 7.

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block. In the case of the present embodiment, as described in the first embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the second insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

As shown in FIG. 9, the corner portion of the liquefied gas storage tank 1 according to the fourth embodiment of the present invention may be formed of a combination of a plurality of corner blocks. The corner structure of the liquefied gas storage tank 1 described below may be an obtuse corner structure having a predetermined angle, for example, an angle of 135 degrees.

In this embodiment, unlike the drawings, the position of the corner primary insulating wall 3b can be positioned so as to expose the corner secondary barrier 41b constructed on the corner secondary insulating wall 5b at the center of the corner. . Therefore, the exposed corner secondary barriers 41b are interconnected with the corner connection barriers 42b and finished, or the corner primary barrier walls 3b are adjacent to each other so as to connect the adjacent corner secondary barriers 41b. Of course, it is also possible to laminate on the corner secondary barrier (41b)/corner connection barrier (42b) after constructing the connection barrier (42b). In this embodiment, the corner connection barrier 42b is formed to extend not only between the inner first and second fixing parts 3b1 and 3b2, but also to overlap at least the inner first and second fixing parts 3b1 and 3b2. can

The corner block of the liquefied gas storage tank (1) is disposed at a corner portion where the first and second surfaces of different angles form a storage space for accommodating liquefied gas, and a corner primary barrier (2b) made of metal. ) is fixed and the corner primary insulating wall (3b) disposed outside the corner primary barrier wall (2b), the corner secondary barrier wall (41b) provided outside the corner primary thermal barrier wall (3b), and the corner secondary barrier (41b) may include a corner secondary insulation column wall (5b) disposed outside.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside.

The corner primary barrier 2b of this embodiment is basically the same as or similar to that of the first embodiment described above, and a detailed description thereof is omitted here.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b. The configuration of the corner primary insulating wall 3b of this embodiment is the same as or different from that of the first embodiment, except that the outer primary plywood 33b is omitted and the configuration of the inner bent portion 3b3 is different. Since it is similar, the description will focus on the different configurations here.

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b) and the corner primary insulating material (32b) are provided to the outside of the corner primary barrier wall (2b). It may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure. Here, the inner primary plywood 31b and the corner primary insulation 32b of this embodiment may be the same as or similar to those of the first embodiment described above, and thus, detailed descriptions are omitted to avoid redundant description. .

The inner first fixing part 3b1 is 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 is fixed to the outer second fixing part 5b2. It may be provided on the inside of the two sides,

In addition, the corner primary insulating wall (3b) is filled between the inner first fixing part (3b1) and the inner second fixing part (3b2), and on the corner secondary barrier (41b) covering the corner connection barrier (42b). It may include an inner bent portion 3b3 including an outer heat insulating material 3b33 provided on the outer heat insulating material 3b33 and an inner heat insulating material 3b34 provided between the outer heat insulating material 3b33 and the corner primary barrier 2b.

The outer heat insulating material 3b33 of the inner bent portion 3b3 may be glass wool, and the corner secondary barrier 41b and the corner connection barrier 42b are laminated on the outer surface bent at a certain angle, for example, at an angle of 135 degrees. A secondary barrier 4 may be provided.

The inner heat insulator 3b34 of the inner bent portion 3b3 may be low density polyurethane foam, and a corner primary barrier 2b may be provided on an inner surface bent at a predetermined angle, for example, at an angle of 135 degrees.

The thickness of each of the outer heat insulating material 3b33 and the inner heat insulating material 3b34 of the inner bent portion 3b3 can be freely set.

The corner secondary barrier 41b may be installed between the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b, and when the corner block is adjacently disposed, the outer first and second fixing portions 5b1 and 5b2 ) The corner secondary barriers 41b adjacent to each other may be connected by the corner connection barrier 42b, and together with the corner primary barrier 2b, it is possible to prevent leakage of liquefied gas to the outside. The corner secondary barrier 41b of this embodiment may have the same or similar basic configuration as that of the first embodiment described above. However, the corner secondary barrier 41b encompassing the corner connection barrier 42b of this embodiment has some configurations of the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b described above. Depending on , the arrangement relationship may vary, which will be referred to when describing the corner secondary insulation thermal wall 5b below.

The corner secondary insulating wall 5b may include an inner secondary plywood 51b, a corner secondary insulating material 52b, and an outer secondary plywood 53b. The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may include an outer first fixing part 5b1 and an outer second fixing part 5b2 composed of a sequentially stacked structure.

Side surfaces of the first outer fixing part 5b1 and the second fixing part 5b2 described above may be provided with an inclination in a direction ED to equally divide the corner portion. In this embodiment, it is described that the corner portion is evenly divided, but it is not limited thereto, and since the corner portion may not be evenly divided according to the corner position, the corner portion may be provided inclined in the direction (ED) for unevenly dividing the corner portion.

Steps may be formed at corners where the first outer fixing part 5b1 and the second fixing part 5b2 are facing each other.

In addition, the corner secondary insulating wall 5b may include an outer bent portion 5b3 including a heat insulating material 5b312 filled between the stepped portion of the outer first fixing portion 5b1 and the outer second fixing portion 5b2. The heat insulating material 5b32 of the outer bent portion 5b3 may be glass wool, which is the same material as the outer heat insulating material 3b33 of the inner bent portion 3b3.

The corner secondary barrier ( 41b) is the inner secondary plywood 51b of the outer first fixing part 5b1, the insulator 5b32 of the outer bent part 5b3, and the inner secondary plywood 51b of the outer second fixing part 5b2. ), and may be provided to be bent at a predetermined angle, for example, at an angle of 135 degrees, from the inside of the heat insulating material 5b32 of the outer bent portion 5b3.

Through this, in this embodiment, a step is formed at the corner where the outer first fixing part 5b1 and the outer second fixing part 5b2, which are respectively fixed to the first and second surfaces at different angles, face each other, The heat insulating material 5b32 of the outer bent portion 5b3 made of glass wool is provided in the portion, and the corner secondary barrier 41b covering the corner connection barrier 42b is interposed between the inner bent portion 5b3 made of glass wool. By providing the outer heat insulating material (3b33), the flexibility of the corner secondary barrier (41b) encompassing the corner connection barrier (42b) formed between the glass wool is improved, so that the corner secondary barrier ( The damage of 41b) can be further prevented.

Figure 10 is a result of structural analysis of the YY direction stress value and temperature distribution of the secondary barriers (4, 41b, 42b) in the portion where the outer first and second fixing parts (5b1, 5b2) face each other and are bent, in the YY direction. The stress value was 12.003 MPa, and the temperature was -64.358°C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

11 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a fifth embodiment of the present invention, and FIG. 12 is a structural analysis result of a corner portion of a liquefied gas storage tank according to a fifth embodiment of the present invention. is a drawing showing

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 of this embodiment may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1 is shown in FIG. As shown in, it may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

In the liquefied gas storage tank 1 of this embodiment, the configuration of the flat block is the same as or similar to the configuration described above with reference to FIG. 1 . That is, as shown in FIG. 1, the flat block of the liquefied gas storage tank 1 of this embodiment is formed on a flat part on the first or second surface at different angles forming a storage space for accommodating liquefied gas. A flat primary insulating wall (3a) disposed outside the flat primary barrier wall (2a) while fixing the flat primary barrier wall (2a) made of metal, and a flat primary thermal insulation wall (3a) provided outside the flat primary thermal barrier wall (3a). A secondary barrier 41a and a flat secondary barrier 5a disposed outside the flat secondary barrier 41a may be included.

Accordingly, a detailed description of the flat block configuration of the liquefied gas storage tank 1 is omitted here in order to avoid redundant description. Hereinafter, the configuration of the corner block of the liquefied gas storage tank 1 of this embodiment will be described in detail with reference to FIGS. 1 and 11 .

As shown in FIGS. 1 and 11, the liquefied gas storage tank 1 includes a primary barrier 2 in contact with liquefied gas, a primary insulation wall 3 installed outside the primary barrier 2, It may include a secondary barrier 4 installed outside the primary barrier wall 3 and a secondary barrier barrier 5 disposed outside the secondary barrier 4. The liquefied gas storage tank 1 may be supported on the hull 7 by the mastic 6 installed between the secondary insulating wall 5 and the hull 7.

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block. In the case of the present embodiment, as described in the first embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the second insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

As shown in FIG. 11, the corner portion of the liquefied gas storage tank 1 according to the fifth embodiment of the present invention may be formed of a combination of a plurality of corner blocks. The corner structure of the liquefied gas storage tank 1 described below may be an obtuse corner structure having a predetermined angle, for example, an angle of 135 degrees.

In this embodiment, unlike the drawings, the position of the corner primary insulating wall 3b can be positioned so as to expose the corner secondary barrier 41b constructed on the corner secondary insulating wall 5b at the center of the corner. . Therefore, the exposed corner secondary barriers 41b are interconnected with the corner connection barriers 42b and finished, or the corner primary barrier walls 3b are adjacent to each other so as to connect the adjacent corner secondary barriers 41b. Of course, it is also possible to laminate on the corner secondary barrier (41b)/corner connection barrier (42b) after constructing the connection barrier (42b). In this embodiment, the corner connection barrier 42b is formed to extend not only between the inner first and second fixing parts 3b1 and 3b2, but also to overlap at least the inner first and second fixing parts 3b1 and 3b2. can

The corner block of the liquefied gas storage tank (1) is disposed at a corner portion where the first and second surfaces of different angles form a storage space for accommodating liquefied gas, and a corner primary barrier (2b) made of metal. ) is fixed and the corner primary insulating wall (3b) disposed outside the corner primary barrier wall (2b), the corner secondary barrier wall (41b) provided outside the corner primary thermal barrier wall (3b), and the corner secondary barrier (41b) may include a corner secondary insulation column wall (5b) disposed outside.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside.

The corner primary barrier 2b of this embodiment is basically the same as or similar to that of the first embodiment described above, and a detailed description thereof is omitted here.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b. The configuration of the corner primary insulating wall 3b of this embodiment is the same or similar to that of the first embodiment except that the outer primary plywood 33b is omitted, and the different configurations will be mainly described here.

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b) and the corner primary insulating material (32b) are provided to the outside of the corner primary barrier wall (2b). It may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure. Here, the inner primary plywood 31b and the corner primary insulation 32b of this embodiment may be the same as or similar to those of the first embodiment described above, and thus, detailed descriptions are omitted to avoid redundant description. .

The inner first fixing part 3b1 is 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 is fixed to the outer second fixing part 5b2. It may be provided on the inside of the two sides,

In addition, the corner primary insulating wall 3b may include an inward bent portion 3b3 formed by filling a heat insulating material 3b35 between the first inner fixing portion 3b1 and the second inner fixing portion 3b2. The heat insulator 3b35 of the inwardly bent portion 3b3 of this embodiment may be the same as or similar to that of the first embodiment described above, and thus a detailed description thereof will be omitted to avoid redundant description.

The corner secondary barrier 41b may be installed between the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b, and when the corner block is adjacently disposed, the outer first and second fixing portions 5b1 and 5b2 ) The corner secondary barriers 41b adjacent to each other may be connected by the corner connection barrier 42b, and together with the corner primary barrier 2b, it is possible to prevent leakage of liquefied gas to the outside. The corner secondary barrier 41b of this embodiment may have the same or similar basic configuration as that of the first embodiment described above. However, the corner secondary barrier 41b covering the corner connection barrier 42b of the present embodiment may have a different arrangement relationship as some configurations of the corner secondary insulating thermal wall 5b are different from those of the first embodiment described above. However, it will be mentioned when the corner secondary insulation thermal wall 5b is described below.

The corner secondary insulating wall 5b may include an inner secondary plywood 51b, a corner secondary insulating material 52b, and an outer secondary plywood 53b. The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may include an outer first fixing part 5b1 and an outer second fixing part 5b2 composed of a sequentially stacked structure.

The inner first fixing part 3b1 is 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 is fixed to the outer second fixing part 5b2. It may be provided on the inside of the two sides,

In addition, the corner secondary insulating wall 5b is provided between the outer first fixing part 5b1 and the outer second fixing part 5b2, and is of the corner secondary barrier 41b covering the corner connection barrier 42b. It may include an outer intermediate fixing portion 5b12 on which the bent portion is seated.

The outer intermediate fixing part 5b12 includes an outer intermediate plywood 51b12 fixed to the first and second surfaces, an outer intermediate insulating material 52b12 provided inside the outer intermediate plywood 51b12, and an outer intermediate plywood 51b12. It is provided on the inside of the intermediate insulation 52b12 and may include an inner intermediate insulation 53b12 on which a bent portion of the corner secondary barrier 41b covering the corner connection barrier 42b is seated.

The outer intermediate plywood 51b12 is located on the same line as the inner secondary plywood 51b and may have the same configuration.

The outer middle insulation material 52b12 may be polyurethane foam.

The inner middle insulation material 53b12 may be glass wool.

An outer intermediate fixing part (5b12) in which an outer intermediate plywood (51b12), an outer intermediate insulating material (52b12), and an inner intermediate insulating material (53b12) are laminated between the outer first fixing part (5b1) and the outer second fixing part (5b2). As a result, the corner secondary barrier 41b covering the corner connection barrier 42b is formed by the inner secondary plywood 51b of the outer first fixing portion 5b1 and the inner middle of the outer intermediate fixing portion 5b12. It is fixed to the heat insulating material (53b12) and the inner secondary plywood (51b) of the outer second fixing part (5b2), at a certain angle from the inside of the inner intermediate insulating material (53b12) of the outer intermediate fixing part (5b12), for example 135 It may be provided to be bent at an angle of degrees.

Through this, the present embodiment provides an outer intermediate fixing part 5b12 between the outer first fixing part 5b1 and the outer second fixing part 5b2 fixed to the first and second surfaces at different angles, respectively. However, the flexibility of the corner secondary barrier (41b) covering the corner connection barrier (42b) formed on the upper part of the inner intermediate insulation material (53b12) of the outer intermediate fixing part (5b12) made of glass wool is improved to form a corner connection barrier (42b) It is possible to further prevent damage to the corner secondary barrier (41b) encompassing.

In addition, in this embodiment, a predetermined distance is spaced between the outer first fixing part 5b1 and the outer second fixing part 5b2 fixed to the first and second surfaces at different angles, and the outer first, By providing an outer intermediate fixing portion 5b12 between the two fixing portions 5b1 and 5b2, between the outer first fixing portion 5b1 and the outer intermediate fixing portion 5b12 and between the outer second fixing portion 5b2 and the outer middle Contraction or expansion stress due to temperature in the outer fixing parts 5b1, 5b2, and 5b12 having two gaps of this embodiment compared to the existing outer fixing part having one gap due to the gaps formed between the fixing parts 5b12 Damage to the corner secondary barrier 41b including the corner connection barrier 42b fixed to the outer fixing parts 5b1, 5b2, and 5b12 can be prevented by mitigating stress.

Figure 12 is a result of structural analysis of the YY direction stress value and temperature distribution of the secondary barriers (4, 41b, 42b) in the portion where the outer first and second fixing parts (5b1, 5b2) face each other and are bent, in the YY direction. The stress value was 13.101 MPa, and the temperature was -74.480 °C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

13 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a sixth embodiment of the present invention, and FIG. 14 is a structural analysis result of a corner portion of a liquefied gas storage tank according to a sixth embodiment of the present invention. is a drawing showing

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 of this embodiment may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1 is shown in FIG. As shown in, it may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

In the liquefied gas storage tank 1 of this embodiment, the configuration of the flat block is the same as or similar to the configuration described above with reference to FIG. 1 . That is, as shown in FIG. 1, the flat block of the liquefied gas storage tank 1 of this embodiment is formed on a flat part on the first or second surface at different angles forming a storage space for accommodating liquefied gas. A flat primary insulating wall (3a) disposed outside the flat primary barrier wall (2a) while fixing the flat primary barrier wall (2a) made of metal, and a flat primary thermal insulation wall (3a) provided outside the flat primary thermal barrier wall (3a). A secondary barrier 41a and a flat secondary barrier 5a disposed outside the flat secondary barrier 41a may be included.

Accordingly, a detailed description of the flat block configuration of the liquefied gas storage tank 1 is omitted here in order to avoid redundant description. Hereinafter, the configuration of the corner block of the liquefied gas storage tank 1 of this embodiment will be described in detail with reference to FIGS. 1 and 13 .

As shown in FIGS. 1 and 13, the liquefied gas storage tank 1 includes a primary barrier 2 in contact with liquefied gas, a primary insulation wall 3 installed outside the primary barrier 2, It may include a secondary barrier 4 installed outside the primary barrier wall 3 and a secondary barrier barrier 5 disposed outside the secondary barrier 4. The liquefied gas storage tank 1 may be supported on the hull 7 by the mastic 6 installed between the secondary insulating wall 5 and the hull 7.

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block. In the case of the present embodiment, as described in the first embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the second insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

As shown in FIG. 13, the corner portion of the liquefied gas storage tank 1 according to the sixth embodiment of the present invention may be formed of a combination of a plurality of corner blocks. The corner structure of the liquefied gas storage tank 1 described below may be an obtuse corner structure having a predetermined angle, for example, an angle of 135 degrees.

The corner block of the liquefied gas storage tank (1) is disposed at a corner portion where the first and second surfaces of different angles form a storage space for accommodating liquefied gas, and a corner primary barrier (2b) made of metal. ) is fixed and the corner primary insulating wall (3b) disposed outside the corner primary barrier wall (2b), the corner secondary barrier wall (41b) provided outside the corner primary thermal barrier wall (3b), and the corner secondary barrier (41b) may include a corner secondary insulation column wall (5b) disposed outside.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside.

The corner primary barrier 2b of this embodiment is basically the same as or similar to that of the first embodiment described above, and a detailed description thereof is omitted here.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b. Compared to the first embodiment, the outer primary plywood 33b is omitted, and the outer surface shape of the heat insulating material 3b31 of the inner bent portion 3b3 is The same or similar bars except for the different ones, here, the different configurations will be mainly described.

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b) and the corner primary insulating material (32b) are provided to the outside of the corner primary barrier wall (2b). It may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure. Here, the inner primary plywood 31b and the corner primary insulation 32b of this embodiment may be the same as or similar to those of the first embodiment described above, and thus, detailed descriptions are omitted to avoid redundant description. .

The inner first fixing part 3b1 is 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 is fixed to the outer second fixing part 5b2. It may be provided on the inside of the two sides,

In addition, the corner primary insulating wall 3b may include an inward bent portion 3b3 formed by filling a heat insulating material 3b36 between the first inner fixing portion 3b1 and the second inner fixing portion 3b2. The heat insulating material 3b36 of the inwardly bent portion 3b3 of this embodiment may be the same as or similar to that of the first embodiment described above. However, the shape of the outer surface of the heat insulator 3b36 of the inward bent portion 3b3 of the present embodiment may be changed according to the configuration of the outer first and second fixing portions 5b1 and 5b2.

That is, in the heat insulator 3b36 of the inward bent portion 3b3 of this embodiment, the outer surface is inward due to the chamfer formed at the corner where the outer first fixing portion 5b1 and the outer second fixing portion 5b2 face each other. It has a shape protruding outward compared to the first fixing part 3b1 or the inner second fixing part 3b2.

The corner secondary barrier 41b may be installed between the corner primary thermal insulation wall 3b and the corner secondary thermal insulation barrier 5b, and when the corner block is adjacently disposed, the outer first and second fixing portions 5b1 and 5b2 ) The corner secondary barriers 41b adjacent to each other may be connected by the corner connection barrier 42b, and together with the corner primary barrier 2b, it is possible to prevent leakage of liquefied gas to the outside. In this embodiment, the corner connection barrier 42b is formed to extend not only between the inner first and second fixing parts 3b1 and 3b2, but also to overlap at least the inner first and second fixing parts 3b1 and 3b2. can

The corner secondary barrier 41b of this embodiment may have the same or similar basic configuration as that of the first embodiment described above. However, the corner secondary barrier 41b covering the corner connection barrier 42b of the present embodiment may have a different arrangement relationship as some configurations of the corner secondary insulating thermal wall 5b are different from those of the first embodiment described above. However, it will be mentioned when the corner secondary insulation thermal wall 5b is described below.

The corner secondary insulating wall 5b may include an inner secondary plywood 51b, a corner secondary insulating material 52b, and an outer secondary plywood 53b. The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may include an outer first fixing part 5b1 and an outer second fixing part 5b2 composed of a sequentially stacked structure.

Side surfaces of the first outer fixing part 5b1 and the second fixing part 5b2 described above may be provided with an inclination in a direction ED to equally divide the corner portion. In this embodiment, it is described that the corner portion is evenly divided, but it is not limited thereto, and since the corner portion may not be evenly divided according to the corner position, the corner portion may be provided inclined in the direction (ED) for unevenly dividing the corner portion.

The outer first fixing part 5b1 and the outer second fixing part 5b2 may have chamfers formed at corners facing each other.

In this embodiment, the inner secondary plywood 51b includes a peripheral plywood 51b1 parallel to the outer secondary plywood 53b and fixed on the corner secondary insulation 52b, and a peripheral plywood 51b1 ) and may be composed of an inclined plywood (51b2) fixed on the corner secondary insulation (52b) of the chamfer portion. Accordingly, unlike the first embodiment described above, the corner primary insulation 32b is provided on the peripheral plywood 51b1, and the insulator 3b36 of the inward bent portion 3b3 is provided on the inclined plywood 51b2. can

By providing the inclined plywood 51b2 and the insulator 3b36 of the inside bent part 3b3 in the chamfer portion of the first outer fixing part 5b1 and the second fixing part 5b2, the corner connection barrier 42b is formed. The encompassing corner secondary barrier 41b includes the peripheral plywood 51b1 of the outer first fixing portion 5b1, the inclined plywood 5b2 of the outer first fixing portion 5b1, and the outer second fixing portion 5b2. ) of the inclined plywood 5b2 and the peripheral plywood 51b1 of the outer second fixing part 5b2.

In addition, the corner secondary barrier 41b covering the corner connection barrier 42b is bent to protrude outward to be seated on the chamfer portion of the outer first fixing portion 5b1 and the outer second fixing portion 5b2. can

That is, the corner secondary barrier 41b encompassing the corner connection barrier 42b includes the peripheral plywood 51b1 of the outer first fixing portion 5b1 and the inclined plywood 51b2 of the first outer fixing portion 5b1. ), bent inward between the inclined plywood 51b2 of the first outer fixed part 5b1 and the inclined plywood 51b2 of the second outer fixed part 5b2, and the second outer high It may be provided to be bent outward between the inclined plywood 51b2 of the top 5b2 and the peripheral plywood 51b1 of the outer second fixing portion 5b2.

Through this, the present embodiment forms a chamfer at the corner where the outer first fixing part 5b1 and the outer second fixing part 5b2, which are respectively fixed to the first and second surfaces at different angles, face each other, and the chamfer By installing a corner secondary barrier 41b covering the corner connection barrier 42b along the surface of the outer first and second fixing parts (5b1, 5b2) including the portion, covering the corner connection barrier 42b The corner secondary barrier 41b protrudes and bends outward, increasing the length of the non-adhesive portion of the corner secondary insulation wall 5b, thereby increasing the flexibility of the corner secondary barrier 41b covering the corner connection barrier 42b. ), it is possible to further lower the damage probability of the corner secondary barrier 41b encompassing the corner connection barrier 42b due to the increase, and the corner secondary barrier 41b encompassing the corner connection barrier 42b is deformed by hull deformation. Absorption becomes easy, and low-temperature stress can be further reduced.

14 is a result of structural analysis of the YY direction stress value and temperature distribution of the secondary barriers 4, 41b, 42b in the portion where the outer first and second fixing parts 5b1 and 5b2 face each other and are bent, in the YY direction. The stress value was 7.197 MPa, and the temperature was -53.710 °C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

15 is a cross-sectional view of a corner portion for explaining a liquefied gas storage tank according to a seventh embodiment of the present invention, and FIG. 16 is a structural analysis result of a corner portion of a liquefied gas storage tank according to a seventh embodiment of the present invention. is a drawing showing

As shown in FIG. 15, the liquefied gas storage tank 1 of this embodiment has the same configuration as the liquefied gas storage tank 1 of the first embodiment described above except for the configuration of the inner bent portion 3b3. Or it may be similar, and accordingly, in order to avoid redundant description of the same configuration, detailed descriptions will be omitted, and description will focus on different configurations.

The configuration of the corner primary insulating wall 3b of the present embodiment is the same as or different from that of the first embodiment, except that the configuration of the portion where the inward bent portion 3b3 formed by filling the heat insulating material 3b31 is disposed is different. Since it is similar, the description will focus on the different configurations here.

The corner primary insulating wall 3b of this embodiment may include a vacuum insulation panel 3b37 filled in the inner bent portion 3b3 between the first inner fixing portion 3b1 and the second inner fixing portion 3b2. there is.

In the case of this embodiment, since the inner first fixing part 3b1 and the inner second fixing part 3b2 are non-structural members, the structural member between the first inner fixing part 3b1 and the second fixing part 3b2 is Construction of the vacuum insulation panel (3b37) is easy. The vacuum insulation panel 3b37 has excellent insulation performance among various insulation materials such as polyurethane foam, and thus can improve insulation performance in a corner portion.

16 is a result of structural analysis of the YY direction stress value and temperature distribution of the secondary barriers 4, 41b, 42b in the portion where the outer first and second fixing parts 5b1 and 5b2 face each other and are bent, in the YY direction. The stress value was 12.003 MPa, and the temperature was -64.358°C. These figures are compared to the fact that the YY direction stress value of the bent portion of the secondary barrier of the existing liquefied gas storage tank is about 66.8984 MPa and the temperature is about -135.857 ° C, the secondary barrier (4, 41b) according to this embodiment , 42b), it can be seen that the stress is much less, which means that the effect of cold heat from cryogenic materials such as damage due to low temperature stress in the secondary barriers 4, 41b, and 42b of this embodiment is reduced compared to the existing ones.

17 is a partial front view of a corner portion for explaining a liquefied gas storage tank according to an eighth embodiment of the present invention.

As shown in FIG. 1, the planar structure of the liquefied gas storage tank 1 of this embodiment may be made of a combination of a plurality of flat blocks, and the corner structure of the liquefied gas storage tank 1 is shown in FIG. As shown in, it may be made of a combination of a plurality of corner blocks. These plurality of flat blocks may be connected to a plurality of corner blocks at the corners of the liquefied gas storage tank (1).

In the liquefied gas storage tank 1 of this embodiment, the configuration of the flat block is the same as or similar to the configuration described above with reference to FIG. 1 . That is, as shown in FIG. 1, the flat block of the liquefied gas storage tank 1 of this embodiment is formed on a flat part on the first or second surface at different angles forming a storage space for accommodating liquefied gas. A flat primary insulating wall (3a) disposed outside the flat primary barrier wall (2a) while fixing the flat primary barrier wall (2a) made of metal, and a flat primary thermal insulation wall (3a) provided outside the flat primary thermal barrier wall (3a). A secondary barrier 41a and a flat secondary barrier 5a disposed outside the flat secondary barrier 41a may be included.

Accordingly, a detailed description of the flat block configuration of the liquefied gas storage tank 1 is omitted here in order to avoid redundant description. Hereinafter, the configuration of the corner block of the liquefied gas storage tank 1 of this embodiment will be described in detail with reference to FIGS. 1 and 17 .

As shown in FIGS. 1 and 17, the liquefied gas storage tank 1 includes a primary barrier 2 in contact with liquefied gas, a primary insulation wall 3 installed outside the primary barrier 2, It may include a secondary barrier 4 installed outside the primary barrier wall 3 and a secondary barrier barrier 5 disposed outside the secondary barrier 4. The liquefied gas storage tank 1 may be supported on the hull 7 by the mastic 6 installed between the secondary insulating wall 5 and the hull 7.

In the above, the primary barrier 2 may be composed of a flat primary barrier 2a of a flat block and a primary corner barrier 2b of a corner block, and the primary thermal insulation wall 3 is a flat primary thermal barrier wall of a flat block. (3a) and the corner of the corner block may be made of a primary insulating wall (3b), and the secondary barrier (4) may be made of a flat secondary barrier (41a) of the flat block and a secondary barrier of the corner of the corner block (41b). In addition, the secondary insulating thermal wall 5 may be formed of a flat secondary insulating thermal wall 5a of a flat block and a corner secondary insulating thermal wall 5b of a corner block. In the case of the present embodiment, as described in the first embodiment, the thickness of the first insulating thermal wall 3 and the thickness of the second insulating thermal wall 5 may be the same or similar in the flat block and the corner block.

In the above, the secondary barrier 4 of the flat block and the corner block is, when a plurality of flat blocks or a plurality of corner blocks are adjacently disposed, the flat secondary barrier 41a disposed adjacently or adjacently disposed adjacently A flat connection barrier 42a or a corner connection barrier 42b connecting the corner secondary barrier 41b may be included.

As shown in FIG. 17, the corner portion of the liquefied gas storage tank 1 according to the eighth embodiment of the present invention may be formed of a combination of a plurality of corner blocks.

The corner block of the liquefied gas storage tank (1) is disposed at a corner portion where the first and second surfaces of different angles form a storage space for accommodating liquefied gas, and a corner primary barrier (2b) made of metal. ) is fixed and the corner primary insulating wall (3b) disposed outside the corner primary barrier wall (2b), the corner secondary barrier wall (41b) provided outside the corner primary thermal barrier wall (3b), and the corner secondary barrier (41b) may include a corner secondary insulation column wall (5b) disposed outside.

The corner primary barrier 2b is disposed at a corner portion where the first or second surfaces of different angles meet to form an accommodation space for accommodating liquefied gas, which is a cryogenic material, and may be made of a metal material. The corner primary barrier 2b, together with the corner secondary barrier 41b, can prevent liquefied gas from leaking to the outside. The corner primary barrier 2b of this embodiment is basically the same as or similar to that of the first embodiment described above, and a detailed description thereof is omitted here.

The corner primary barrier 2b may be fixed to the barrier fixing member 21b.

The barrier fixing member 21b is made of a metal material and may be installed on the top of the corner primary insulating wall 3b. In the case of the corner primary thermal insulation wall 3b, a plurality may be disposed along the edge of the corner portion on the corner secondary thermal insulation wall 5b, and accordingly, the barrier fixing member 21b is attached to each of the plurality of corner primary thermal insulation walls 3b. Can be installed independently.

The corner primary barrier wall (3b) 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 the primary corner barrier (2b) and the secondary corner barrier It may be installed between the barriers 41b.

The corner primary insulating wall 3b is provided on the inside of the first and second surfaces, respectively, and consists of a corner primary insulating material 32b fixed to the corner secondary barrier wall 41b and a corner primary insulating material 32b. It may include an inner primary plywood (31b) disposed on the inner side, forming a step with the corner primary insulation material (32b), and to which the corner primary barrier wall (2b) is fixed.

The corner primary insulating wall 3b in which the inner primary plywood 31b and the corner primary insulating material 32b are sequentially stacked may be arranged in plurality along the side of the corner portion on the corner secondary insulating thermal wall 5b. .

In this embodiment, it is described that the corner primary insulating wall 3b is composed of the inner primary plywood 31b and the corner primary insulating material 32b, but at least one of the first to seventh embodiments described above Of course, it may be the same as or similar to the corner primary insulating wall 3b according to the embodiment.

The plurality of corner primary insulating walls 3b are disposed adjacent to each other on the corner secondary insulating thermal wall 5b, and filling of a separate insulating material such as glass wool between the plurality of corner primary insulating walls 3b is omitted. , It can be arranged by minimizing the distance between the plurality of corner first-insulation thermal walls 3b.

In this way, when the plurality of corner primary insulating walls 3b are disposed, a stepped space is created between the corner primary insulating material 32b and the inner primary plywood 31b forming a step. The corner block of this embodiment includes an inner first packing material 3b4 on which the corner primary barrier wall 2b is seated and filled in the stepped space of the corner primary insulating wall 3b disposed adjacent to each other.

The inner first packing material 3b4 may be polyurethane foam or glass wool.

The plurality of corner primary insulating walls 3b are part of a corner block together with the corner secondary insulating walls 41b and the corner secondary insulating thermal walls 5b, and the entirety of the plurality of corner primary insulating walls 3b constituting the corner block. The width may be smaller than that of the corner secondary insulating wall 5b, which is another component of the corner block. As a result, a part of the corner secondary barrier wall 41b may be exposed to the outermost side of the plurality of corner primary thermal insulation walls 3b. When a plurality of corner blocks are arranged adjacently along the edge of the corner portion, the space between the outermost corner primary insulating wall 3b adjacently disposed adjacent to each other, that is, the space portion in which the corner secondary barrier 41b is exposed, A corner connection insulating wall 34b may be installed.

The corner connection insulation wall 34b is disposed between the neighboring outermost corner primary insulation walls 3b when the corner blocks are disposed adjacent to each other, and the same or similar corner connection insulation material as the corner primary insulation wall 3b ( 341b) and the corner connection plywood 342b may be provided in a stacked form, and have the same or similar thickness as the corner primary insulating thermal wall 3b.

When a plurality of corner blocks are arranged adjacent to each other along the edge of the corner portion, the corner connection insulating wall 34b forms a space between the corner secondary insulation walls 5b disposed adjacent to each other as a corner connection barrier 42b. It is installed to perform a role of blocking heat intrusion from the outside while sealing together with.

In this way, when a plurality of corner blocks are arranged adjacently along the corner portion, there is a space between the corner connection insulation material 341b and the corner primary insulation material 32b and between the corner connection plywood 342b and the inner primary plywood 31b. is created, and the inner second packing material 3b5 on which the corner primary barrier 2b is seated is filled in this space to complete the construction of the corner primary insulating thermal wall 3b.

The inner second packing material 3b5 may be polyurethane foam or glass wool.

The corner secondary barrier 41b may be installed between the corner primary barrier wall 3b and the corner secondary barrier barrier 5b, and together with the corner primary barrier 2b, prevent liquefied gas from leaking to the outside. can

The corner secondary barrier (41b) is a part of the corner block along with the corner primary thermal insulation wall (3b) and the corner secondary thermal insulation barrier (5b), and when the corner block is adjacently arranged, the neighboring secondary secondary barrier (41b) A sealing connection may be made through the corner connection barrier 42b.

The corner connection barrier 42b may connect a neighboring corner secondary barrier 41b exposed to the outside when the corner block is adjacently disposed, and a corner connection insulation wall 34b may be installed on the upper portion.

The corner secondary insulating wall 5b may include an inner secondary plywood 51b, a corner secondary insulating material 52b, and an outer secondary plywood 53b. The corner secondary insulation wall (5b) is fixed to the inside of the first and second surfaces, respectively, and the inner secondary plywood (51b), the corner secondary insulation (52b) to the outside of the corner secondary barrier (2b), The outer secondary plywood 53b may be configured in a sequentially stacked structure.

When a plurality of corner blocks are arranged adjacent to each other along the edge of the corner portion, the space formed between the adjacently arranged corner secondary insulation column walls 5b can be filled with the outer packing material 5b4.

The outer packing material 5b4 may be polyurethane foam or glass wool.

The corner secondary insulating wall 5b of this embodiment may be the same as or similar to the corner secondary insulating thermal wall 5b according to at least one of the first to seventh embodiments described above. In order to avoid redundant description, detailed descriptions are omitted.

Through this, in this embodiment, a plurality of corner primary thermal insulation walls 3b including the inner primary plywood 31b forming a step with the corner primary thermal insulation material 32b are disposed on the corner secondary thermal insulation wall 5b. , By configuring the neighboring corner primary insulation materials 32b to be adjacently disposed, not only the installation handling of the barrier fixing member 21b is facilitated through the stepped portion between the adjacently disposed inner primary plywoods 31b, but also , since the packing material 3b4 only needs to be seated on the stepped portion, consumption of the packing material can be reduced.

18 is a partial front view of a corner portion for explaining a liquefied gas storage tank according to a ninth embodiment of the present invention, FIG. 19 is a perspective view for explaining an upper block of FIG. 18, and FIG. 20 is an upper connection of FIG. It is a perspective view for explaining the block, Figure 21 is an exploded perspective view of the upper block of Figure 19, Figure 22 is a cross-sectional view of the upper block of Figure 19, Figure 23 is a cross-sectional view showing another embodiment of the upper block of Figure 19 , Figure 24 is a perspective view for explaining the stuffing piece of Figure 18, Figure 25 is a view for explaining the bonding prevention member applied to the upper connection block of Figure 18, Figure 26 is applied to the upper connection block of Figure 18 It is a drawing for explaining another embodiment of the anti-bonding member.

In addition, (a) and (b) of FIG. 27 are views for explaining another embodiment of the upper block and upper connection block of FIG. 18, and FIG. 28 is a corner portion to which the upper block and upper connection block of FIG. 27 are applied. Partially enlarged front views, (a) and (b) of FIG. 29 are views for explaining another embodiment of the upper block and upper connection block of FIG. 18, and FIG. 30 is the upper block and upper connection block of FIG. This is a partially enlarged front view of the applied corner part.

31 (a) and (b) are views showing structural analysis results for each of the barrier fixing member of this embodiment without a stiffener and the barrier fixing member of a comparative example provided with a stiffener, respectively. (a) and (b) are views showing structural analysis results for the component (plywood) provided below each of the barrier fixing member of this embodiment without a stiffener and the barrier fixing member of a comparative example equipped with a stiffener. am.

As shown in FIG. 18, the corner portion of the liquefied gas storage tank 100 according to the ninth embodiment of the present invention may be formed of a combination of a plurality of corner blocks CB. The primary structure of the corner block CB is a lower block LB fixed to the hull 7 and made of a single board, and a plurality of upper blocks bonded to the lower block LB ( UB) and an upper connection block (UBB) connecting a lower block (LB) disposed adjacent to each other.

The corner block CB of this embodiment is a corner portion where the first and second surfaces of different angles meet, forming a storage space for receiving liquefied gas, as in the above-described first to eighth embodiments. Although not shown, the corner primary barrier 2b made of metal is formed on the upper block UB and the upper connection block UBB as described above in the state where the corner block CB is disposed. To complete the corner portion of the liquefied gas storage tank 100 having a receiving space for sealing the liquefied gas, which is a cryogenic material.

The liquefied gas storage tank 100 of this embodiment is completed by connecting the corner block CB formed at the corner portion and the flat block formed at the flat portion, where the flat block is the diagram of the first embodiment described above. 1 or a planar block FB shown in FIG. 33 of a tenth embodiment to be described later, but is not limited thereto.

In addition, the corner block (CB) of this embodiment will be described in detail by dividing it into a lower block (LB), an upper block (UB), and an upper connection block (UBB) below, but is not limited thereto, and the first embodiment described above Of course, it may be the same as or similar to the structure of any one of the eighth embodiments.

As shown in FIG. 18, the lower block LB may have a plurality of upper blocks UB and upper connection blocks UBB installed on the upper surface, and corner 2 bonded to the lower surface of the upper block UB. When the secondary barrier wall (41b) and the lower block (LB) are disposed adjacently, the upper block (UB) is not installed and connects the secondary barrier wall (41b) adjacent to the corner exposed to the outside, and the lower surface of the upper connection block (UBB) With a corner secondary insulation wall (5b) composed of a corner connection barrier (42b) bonded to, an inner secondary plywood (51b), a corner secondary insulation material (52b), and an outer secondary plywood (53b). It can be done.

The lower block LB of this embodiment may be the same as or similar to the configuration according to at least one of the above-described first to eighth embodiments, and thus, detailed description is given here to avoid redundant description. omit

The plurality of upper blocks UB may be bonded to the lower block LB.

As shown in FIGS. 18, 19 and 21, each of the plurality of upper blocks UB fixes the corner primary barrier 2b made of metal and is a barrier disposed outside the corner primary barrier 2b. It has a basic structure consisting of a fixing member 21b and a corner primary insulating wall 3b disposed outside the barrier fixing member 21b. Here, the corner primary insulating wall 3b may further include an inward bent portion 3b3.

The upper blocks UB having the basic structure as described above may be arranged side by side with a certain gap and bonded on the lower block LB, and in this embodiment, as shown in FIG. 18, five blocks have a certain gap It may be placed side by side and arranged, but is not limited thereto.

The barrier fixing member 21b is made of metal and may be installed on the upper portion of the first corner heat insulating wall 3b, and is bent at a predetermined angle on the inside of the first and second surfaces, for example, to accommodate liquefied gas. It may be bent at the same angle as the angle formed by the first and second surfaces of different angles forming the storage space. In the case of the corner first insulating wall (3b), a plurality may be arranged along the side of the corner portion forming a right angle or an obtuse angle on the corner second insulating wall (5b) constituting the lower block (LB), and accordingly, the barrier fixing member (21b) may be bent at a right angle or an obtuse angle and installed independently on top of each of the plurality of corner first-blocking thermal walls 3b.

The barrier fixing member 21b may be installed on the upper part of the corner primary insulating heat wall 3b by using a plurality of coupling members 21b1 provided on the rear surface. The coupling member 21b1 may be formed of a stud bolt and a nut.

As shown in FIG. 21, the barrier fixing member 21b of this embodiment is not provided with a reinforcing member holding the upper portion of the corner primary insulating wall 3b on the rear surface.

In general, as a reinforcing member holding the upper portion of the corner primary insulating wall 3b, there is a stiffener 122b, as shown in FIG. 31(b). That is, the general barrier fixing member 121b is provided with a stiffener 122b along the edge of the rear surface as a reinforcing member. This stiffener 122b has a concept of firmly fixing the upper block UB.

However, the general barrier fixing member 121b provided with the stiffener 122b has a problem that is vulnerable to stress when an external force such as behavior or thermal load is applied at a portion bent at a right angle or an obtuse angle due to hull behavior there was.

Therefore, in order to solve this problem, the barrier fixing member 21b of this embodiment is coupled to the upper surface of the corner primary insulation wall 3b in a plane-to-plane without a reinforcing member such as a stiffener 122b on the rear surface, structural analysis It was also proved by the results.

31 (a) shows the barrier fixing member 21b without the stiffener 122b in the liquefied gas storage tank 100 of the present embodiment when an external force such as behavior due to hull behavior or thermal load is applied ), and Figure 31 (b) is a stiffener 122b in the liquefied gas storage tank 100a of the comparative example when an external force such as behavior due to hull behavior or thermal load is applied ) As a diagram showing the structural analysis results for a general barrier fixing member (121b) provided, compared to the structural analysis results, when there is a stiffener (122b) (comparative example) than when there is no (this embodiment) is flexible to external force In response, it was found that the stress was evenly distributed in the part bent at a right or obtuse angle.

32(a) shows the barrier fixing member 21b without the stiffener 122b in the liquefied gas storage tank 100 of the present embodiment when an external force such as behavior due to hull behavior or thermal load is applied ) is a view showing the structural analysis results for the component (plywood) provided on the lower side, and FIG. A drawing showing the structural analysis results for the component (plywood) provided on the lower side of the general barrier fixing member 121b equipped with the stiffener 122b in the storage tank 100a, which is bent at a right angle or an obtuse angle compared to the structural analysis result Since the bending of the bent part is also reduced due to the evenly distributed stress in the bent part, it can be seen that the pressure acting on the components bonded to the lower side is also distributed evenly with a low value.

Through this, the present embodiment does not have a reinforcing member such as the stiffener 122b on the rear surface of the barrier fixing member 21b, thereby reducing the weight of the barrier fixing member 21b itself, and attaching the reinforcing member Since welding is not performed for welding, it is possible to reduce welding man-hours and increase the degree of welding during manufacturing, and uniformly distributes the stress generated in the bent part at right angles or obtuse angles, so that conventional stiffeners (122b) are provided. General barrier fixing member Compared to (121b), the stability of the system can be increased by reducing the frequency of damage in the bent part and minimizing repair.

The corner primary insulating wall 3b 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 the barrier fixing member 21b and the lower block LB ) Can be installed between the corner secondary barriers (41b).

The corner primary insulating wall (3b) is provided on the inside of the first and second surfaces, respectively, and the inner primary plywood (31b), the corner primary insulating material (32b), and the outer side of the barrier fixing member (21b) The primary plywood 33b may include an inner first fixing part 3b1 and an inner second fixing part 3b2 composed of a sequentially stacked structure.

In addition, the corner primary insulating wall 3b may include an inward bent portion 3b3 made of a heat insulating material in a space between the first inner fixing portion 3b1 and the second inner fixing portion 3b2.

The corner primary insulating wall 3b of this embodiment may be the same as or similar to the corner primary insulating thermal wall 3b of the first embodiment described above, and therefore, detailed description is omitted here to avoid redundant description.

In the upper block UB configured as described above, the inner primary plywood 31b is installed on the inner upper surface of the corner primary insulation material 32b, and is installed to form a step with the corner primary insulation material 32b. Due to this, when the upper blocks UB having a basic structure are arranged side by side with a certain gap, the neighboring corner primary insulation materials 32b are disposed adjacently, and there is a stepped space between the neighboring inner primary plywoods 31b. this will arise A separate insulating material filling may be omitted between the corner primary insulating materials 32b disposed adjacent to each other.

As shown in FIG. 24, a stuffing piece 10 is inserted into the stepped space created between the neighboring inner primary plywoods 31b. A detailed description of the stuffing piece 10 will be described later.

The upper connection block UBB is bonded to the upper surface of the lower block LB disposed adjacent to each other to connect the lower blocks LB.

As shown in FIGS. 18 and 20, the upper connection block (UBB) fixes the corner primary barrier 2b made of metal and is a barrier fixing member 21b disposed outside the corner primary barrier 2b. And, it may be made of a corner connection insulating wall (34b) disposed on the outside of the barrier fixing member (21b). Here, the corner connection insulating wall 34b may further include a corner connection bent portion 34b3.

The barrier fixing member 21b of the upper connection block UBB may be the same as or similar to the barrier fixing member 21b of the upper block UB described above, so a detailed description is omitted here to avoid redundant description. .

The corner connection insulation wall 34b of the upper connection block UBB withstands impact from the outside or impact from liquefied gas sloshing from the inside while blocking heat intrusion from the outside together with the corner primary insulation wall 3b. It is designed to be, and can be installed between the barrier fixing member (21b) and the corner connection barrier (42b) of the lower block (LB).

The corner connection insulating wall (34b) is provided on the inside of the first and second surfaces, respectively, and the corner first connection plywood (342b), the corner connection insulation material (341b) to the outside of the barrier fixing member (21b), The corner second connection plywood 343b may include a corner first connection fixing part 34b1 and a corner second connection fixing part 34b2 composed of a sequentially stacked structure.

In addition, the corner connection insulating wall 34b may include a corner connection bending part 34b3 made of a heat insulating material in a space between the first corner connection fixing part 34b1 and the second corner connection fixing part 34b2. . The corner connection bent portion 34b3 may be formed of the same or similar material as the inner bent portion 3b3, for example, low-density polyurethane foam or glass wool.

In this embodiment, the corner connection insulating wall 34b may be structurally the same or similar with only the reference numerals different from the corner first insulating wall 3b described above, so redundant description is given here. For avoidance, specific explanations are omitted.

In the upper connection block UBB configured as described above, the corner first connection plywood 342b is installed on the inner upper surface of the corner connection insulation 34b, and is installed to form a step with the corner connection insulation 34b. Due to this, when the upper connection block (UBB) is placed at the connection part of the lower block (LB) to connect the neighboring lower block (LB), the corner connection insulation material (341b) and the upper block (UB) of the upper connection block (UBB) ) The corner primary insulation material 32b is disposed adjacent to each other, and there is a stepped space between the corner first connection plywood 342b of the upper connection block UBB and the inner primary plywood 31b of the upper block UB. this will arise Between the corner primary insulation 32b of the upper block UB and the corner connection insulation 341b of the upper connection block UBB, which are disposed adjacent to each other, filling of a separate insulation material may be omitted.

As shown in FIG. 24, a stuffing piece 10 is inserted into the stepped space created between the corner first connecting plywood 342b and the inner primary plywood 31b.

As shown in FIGS. 18 and 24, the stuffing piece 10 is formed on the inner side of the upper block UB as well as the first step space generated between the inner primary plywoods 31b of the neighboring upper block UB. It is also inserted into the second step space created between the first plywood 31b and the corner first connection plywood 342b of the upper connection block UBB, and the gap between the neighboring upper blocks UB and the upper block UB ) and the upper connection block (UBB), as well as making it possible to keep the gap constant, as well as the inner bend (3b3) of the upper block (UB) and the corner connection bend (34b3) of the upper connection block (UBB) can be fixed, and handling can be facilitated when working on the upper block (UB).

When the inner bent part 3b3 or the corner connection bent part 34b3 is not fixed, a constant gap between neighboring upper blocks UB or between upper blocks UB and upper connecting blocks UBB cannot be maintained and the phenomenon of leaning this may occur.

Accordingly, when the stiffener 122b is provided along the edge of the rear surface like the general barrier fixing member 121b described above, the stiffener 122b fixes the inner bent part 3b3 or the corner connection bent part 34b3 However, in the case of the barrier fixing member 21b of this embodiment, since the stiffener 122b is not provided, a separate fixing means for fixing the inner bent part 3b3 or the corner connection bent part 34b3 is required, stuffing piece (10) serves as a fixing means.

The stuffing piece 10 may be formed of the same or similar material as the inner bent portion 3b3 or the corner connection bent portion 34b3, for example, low-density polyurethane foam, corresponding to the first and second stepped spaces. It may consist of a body 11 having a shape and an end 12 inserted into the inner bent part 3b3 or the corner connection bent part 34b3 after the body 11 is inserted into the first and second stepped spaces.

In the above, the end portion 12 may be formed in a wedge shape so as to be easily inserted into the inner bent portion 3b3 or the corner connection bent portion 34b3.

In addition, an adhesive (not shown) may be applied to the end portion 12 to stably fix the inner bent portion 3b3 or the corner connection bent portion 34b3.

The assembly process of the upper block UB configured as described above will be described with reference to FIGS. 21 and 22.

In the primary assembly process, the outer primary plywood 33b having a plurality of first holes 81 is bonded to the outer surface of the corner primary insulation 32b having a plurality of second holes 82, The inner primary plywood 31b having a plurality of third holes 83 is bonded to the inner surface of the corner primary insulation material 32b having a plurality of second holes 82.

Here, the first, second, and third holes 81, 82, and 83 may be formed on an extension line of a position corresponding to each of the plurality of coupling members 21b1 provided in the barrier fixing member 21b. The first and second holes 81 and 82 have the same size and have a hole shape in which the outer primary plywood 33b and the corner primary insulation material 32b communicate by bonding, and the communication hole is formed with foam. It can be sealed by inserting the plug 9, and the third hole 83 can be formed to a size into which the coupling member 21b1 can be inserted.

In the secondary assembly process, in a state where the outer primary plywood 33b, the corner primary insulation 32b, and the inner primary plywood 31b are bonded, a plurality of the inner primary plywood 31b is formed. The barrier fixing member 21b is brought into close contact with the upper surface of the inner primary plywood 31b so that the plurality of coupling members 21b1 are inserted into the third hole 83.

In the tertiary assembling process, the barrier fixing member 21b is connected to the inner primary plywood 31b by bolting and fastening the coupling member 21b1 through the communication hole formed by the plurality of first and second holes 81 and 82. ) to be fixed to the upper surface of the

In the fourth assembly process, the foam plug 9 is formed in the communication hole formed by the plurality of first and second holes 81 and 82 while the barrier fixing member 21b is fixed to the inner primary plywood 31b. ) is inserted. Here, the foam plug 9 has a size corresponding to the communication hole, and may be made of the same or similar material as the corner primary insulation material 32b.

Thereafter, the inner first fixing part 3b1 and the inner second fixing part formed by the structure in which the outer primary plywood 33b, the corner primary insulation 32b, and the inner primary plywood 31b are bonded together. The assembly process of the upper block UB is completed by inserting the inner bent part 3b3 into the space between 3b2.

As described above, the upper block UB of this embodiment has an outer primary plywood 33b having a plurality of first holes 81 and a corner primary insulation material 32b having a plurality of second holes 82 ) and the inner primary plywood 31b having a plurality of third holes 83 are first bonded, and then the barrier fixing member 21b can be fastened by bolting.

Although the assembly process of the upper block UB has been described above, it goes without saying that an upper connection block UBB structurally identical or similar to the upper block UB may also be assembled in the same or similar assembly process. Accordingly, in this embodiment, the configuration of the upper block (UB) may be used in a sense including the configuration of the upper connection block (UBB).

In the upper block UB of this embodiment described above, a plurality of first holes 81 are formed in the outer primary plywood 33b, and a plurality of second holes 82 are formed in the corner primary insulation material 32b. Although the structure is formed, it is possible to remove the first and second holes 81 and 82 formed in the outer primary plywood 33b and the corner primary insulation 32b, respectively, which will be described with reference to FIG. 23 .

As shown in FIG. 23, in the upper block UB of another embodiment, the first and second holes 81 and 82 are omitted in the outer primary plywood 33b and the corner primary insulation 32b, respectively. may have a structure.

In this case, the assembly process of the upper block UB of another embodiment may be different, which will be described below.

In the first assembling process, the barrier fixing member ( 21b) is brought into close contact, and the coupling member 21b1 is fastened by bolting so that the barrier fixing member 21b is fixed to the upper surface of the inner primary plywood 31b.

In the secondary assembly process, the corner primary insulation material 32b is bonded to the outer surface of the inner primary plywood 31b, and the outer primary plywood 33b is bonded to the outer surface of the corner primary insulation material 32b. bonding combine

Thereafter, the inner first fixing part 3b1 and the inner second fixing part formed by the structure in which the outer primary plywood 33b, the corner primary insulation 32b, and the inner primary plywood 31b are bonded together. The assembly process of the upper block UB is completed by inserting the inner bent part 3b3 into the space between 3b2.

The upper block UB of another embodiment, which is assembled and manufactured in this way, has separate first and second holes 81 and 82 processed in each of the outer primary plywood 33b and the corner primary insulation 32b, and a foam plug ( The additional insertion process of 9) can also be omitted, and since the first and second holes 81 and 82 can be deleted, it is not only advantageous to maintain insulation, but also has stronger strength. In addition, the upper block UB of another embodiment When bonding to the lower block LB, it is possible to fill the gluing lost due to the first and second holes 81 and 82 in the process of gluing the lower part of the upper block UB of another embodiment, which can be advantageous in terms of adhesive strength there is.

In the above, the upper connection block (UBB) is bonded to overlap the upper surface of each of the neighboring lower blocks (LB) in a state in which a plurality of upper blocks (UB) are disposed adjacent to the lower block (LB) bonded to the upper surface. It is coupled to connect the lower blocks LB.

Since the upper connection block UBB is combined with the lower block LB by bonding the corner second connection plywood 343b to the lower block LB, as shown in FIG. 28 or 30, the adhesive 20 ) is applied to the upper surface of the corner connection barrier 42b corresponding to the corner second connection plywood 343b, and then pressed and bonded.

At this time, in order to increase the bonding force between the upper connection block UBB and the lower block LB, the adhesive 20 is pressed so that it squeezes out to a certain extent, so that the bonding area of the corner second connection plywood 343b The entire contact surface is bonded to the corner connection barrier 42b.

However, when the amount of the adhesive 20 is excessive, the adhesive 20 coming out escapes to the exposed surface of each of the corner connection bent portion 34b3 and the corner connection insulation 341b, which are non-bonding areas that should not be bonded, and connects the corners. Since the bent portion (34b3) and the corner connection barrier (42b) or the corner connection insulation (341b) and the corner primary insulation (32b) of the neighboring upper block (UB) can be bonded, Additional work, such as scraping off the adhesive 20, has to be performed.

In the case of this embodiment, as shown in FIG. 18, the gap between the corner connection insulation 341b of the upper connection block UBB and the corner primary insulation 32b of the upper block UB is visible to the naked eye, the adhesive 20 ) is so narrow that it cannot be confirmed that it has escaped, and it is difficult to scrape off the adhesive 20 that has escaped through the gap.

Accordingly, in this embodiment, as shown in FIGS. 25 and 26, when bonding the upper connection block (UBB), the adhesive 20 is a non-bonding area, the corner connection bent portion 34b3 and the corner connection insulation ( 341b) Prevents exit to each exposed surface, or even if it escapes, the corner connection bent portion 34b3 and the corner connection barrier 42b or the corner connection insulation material 341b and the corner primary insulation of the neighboring upper block UB ( 32b) further includes an anti-bonding member 30 capable of preventing bonding. The anti-bonding member 30 may be formed of a film made of a sponge material.

As shown in FIG. 25, the anti-bonding member 30 may be installed on the exposed surface of each of the corner connection bent portion 34b3 and the corner connection insulation 341b, which are non-bonding areas in the upper connection block UBB. .

In addition, as shown in FIG. 26, the anti-bonding member 30 is a corner connection barrier 42b of the lower block LB to which the corner connection bent portion 34b3, which is a non-bonding area of the upper connection block UBB, is in contact. ) and the exposed surface of each of the inner bent portion (3b3) and the corner primary insulation (32b) of the upper block (UB) adjacent to the corner connection insulation (341b), which is the non-bonding area of the upper connection block (UBB). can be installed on

As shown in FIGS. 18, 28 and 30, the upper blocks UB of this embodiment are arranged side by side with a predetermined gap and bonded to the upper surface of the lower block LB. Since the upper block UB is combined with the lower block LB by bonding the outer primary plywood 33b to the lower block LB, the adhesive 20 corresponds to the outer primary plywood 33b. In the state of being applied to the upper surface of the corner secondary barrier 41b of the part to be bonded by pressing.

At this time, in order to increase the bonding force between the upper block UB and the lower block LB, the adhesive 20 is pressed so that it squeezes out to a certain extent, and the entire contact surface of the outer primary plywood 33b, which is the bonding area To be bonded to the corner secondary barrier (41b).

In addition, as shown in FIGS. 18, 28 and 30, the upper connection block (UBB) of this embodiment is disposed adjacent to the lower block (LB) to which a plurality of upper blocks (UB) are bonded to the upper surface. In this state, the lower blocks LB may be connected to each other by bonding to overlap each other on the upper surfaces of the neighboring lower blocks LB. Since the upper connection block UBB is combined with the lower block LB by bonding the corner second connection plywood 343b to the lower block LB, the adhesive 20 is applied to the corner second connection plywood 343b. ) is applied to the upper surface of the corner connection barrier 42b of the portion corresponding to ), and then pressed and bonded.

At this time, in order to increase the bonding force between the upper connection block UBB and the lower block LB, the adhesive 20 is pressed so that the adhesive 20 squeezes out to a certain extent, so that the corner second connection plywood 343b, which is the bonding area, as much as possible ) so that the entire contact surface is bonded to the corner connection barrier (42b).

However, in the case of this embodiment, the corner connection insulation of the upper connection block (UBB) as well as the gap between the corner primary insulation (32b) of the upper block (UB) and the corner primary insulation (32b) of the neighboring upper block (UB) The gap between (341b) and the corner primary insulating material (32b) of the upper block (UB) is so narrow that it cannot be confirmed that the adhesive 20 has escaped with the naked eye, so that squeeze out (squeeze out) cannot be confirmed. That is, when the upper block UB and the upper connection block UBB are bonded to the lower block LB, sufficient application of the adhesive 20 cannot be confirmed, due to insufficient bonding area between the upper block UB and the lower block LB. ) or between the upper connection block (UBB) and the lower block (LB), bonding strength may be lowered, or bonding defects such as bonding of neighboring blocks (UB, UBB) may occur.

Accordingly, in this embodiment, as shown in FIGS. 27 to 30, the squeeze out of the adhesive 20 can be confirmed when bonding the upper block UB and the upper connection block UBB to the lower block LB. A possible squeeze-out check means is provided to prevent bonding defects.

In the above, the squeeze out check means, as shown in (a) of FIG. 27, the chamfer CF provided at both ends of the outer primary plywood 33b of the upper block UB, and the ( As shown in b), the corners of the upper connection block UBB may be chamfers CF provided at both ends of the second connection plywood 343b. As shown in FIG. 28, such a chamfer (CF), when the upper block (UB) and the upper connection block (UBB) are disposed on the lower block (LB), the upper block (UB) and the upper block ( UB) and between the upper block UB and the upper connection block UBB adjacent thereto, it is possible to confirm that the adhesive 20 is squeezed out from the front.

In addition, as shown in (a) of FIG. 29, the squeeze-out confirmation unit includes a groove GV provided adjacent to both edges of the outer primary plywood 33b of the upper block UB, and As shown in (b), the corner of the upper connection block UBB may be a groove GV provided adjacent to both edges of the second connection plywood 343b. As shown in FIG. 30, the groove (GV) connects the upper block (UB) and the upper connection block (UBB) in a state in which a plurality of upper blocks (UB) and upper connection blocks (UBB) are disposed on the lower block (LB). It is possible to confirm that the adhesive 20 is squeezed out of the block UBB from a front light.

Through this, in this embodiment, the outer primary plywood 33b and the corner second connection plywood 343b, which are the lower layers of each of the upper block UB and the upper connection block UBB, have a chamfer as a squeeze out check means ( CF) or groove (GV) shape, it is possible to reduce the weight of each of the upper block (UB) and upper connection block (UBB), and the adhesive in each of the upper block (UB) and upper connection block (UBB) 20), the adhesive 20 that is squeezed out can be directly checked with the naked eye, thereby increasing the stability of the system. When comparing the chamfer (CF) and the groove (GV), which are squeeze-out confirmation means, the amount of the adhesive 20 applied can be increased when the chamfer (CF) shape is applied than when the groove (GV) shape is applied. Adhesion can be increased.

33 is a view for explaining a liquefied gas storage tank according to a tenth embodiment of the present invention.

As shown in FIG. 33, in the liquefied gas storage tank 200 according to the tenth embodiment of the present invention, after installing the corner block CB at the corner and installing the flat block FB at the flat part, Carry out the work of filling the gap generated at the part where the corner block (CB) and the flat block (FB) come into contact due to the tank hull and block installation tolerance with an insulating material.

In general, the job of filling the gap that occurs at the junction between the corner block (CB) and the flat block (FB) with insulating material (block connection system installation work) is a complicated process and a lot of time is invested because the size of the gap is not constant is known to be

Accordingly, the present embodiment simplifies the operation of filling the gap generated at the contact portion between the corner block CB and the flat block FB with an insulating material, which will be described in detail below.

The liquefied gas storage tank 100 is a flat block (FB) installed at the corner, a flat block (FB) installed at the flat part, a corner block (CB) by a tank hull and block installation tolerance and a block connection system 40 installed in a gap generated at a portion in contact with the flat block FB.

The flat block FB fixes the flat primary barrier 2a made of metal, and the flat primary barrier wall 3a disposed outside the flat primary barrier 2a, and the outer side of the flat primary barrier wall 3a. It consists of a flat secondary barrier (41a) and a flat secondary barrier (5a) disposed outside the flat secondary barrier (41a) and installed on the hull (7), and the first surface at a different angle or It is disposed on a flat part on the second surface to form a storage space for accommodating liquefied gas together with the corner block CB.

In this embodiment, the plane block FB may have the same or similar structure as the plane block of the first embodiment described above, but is not limited thereto, and may of course have a structure of another known plane block.

The corner block (CB) fixes the corner primary barrier wall (2b) made of metal, and the corner primary barrier wall (3b) disposed outside the corner primary barrier wall (2b) and the outer side of the corner primary barrier barrier (3b). It is composed of a corner secondary barrier wall (41b) and a corner secondary barrier wall (5b) disposed outside the corner secondary barrier wall (41b) and installed on the hull (7), and the corner where the first and second surfaces meet. It is disposed in the portion to form a storage space for accommodating liquefied gas together with the flat block FB.

In this embodiment, the corner block CB may have the same or similar structure as the corner blocks of the first to ninth embodiments described above, but is not limited thereto and may have a structure of other known corner blocks. am.

The block connection system 40 is installed in the gap between the flat secondary insulating wall (5a) of the flat block (FB) and the corner secondary insulating thermal wall (5b) of the corner block (CB), and the flat block (FB) and the corner block ( CB), and may include a flow path member 41, a block buffer member 42, and a block connection member 43.

The passage member 41 may be installed at the bottom of the gap so that the first space between the flat block FB and the hull 7 and the second space between the corner block CB and the hull 7 communicate with each other, , a liquid flow passage such as condensate or a _nitrogen gas circulation passage may be provided.

That is, as will be described later, the block connection member 43 of this embodiment is formed in an automatic spray method using the spray device 50, so when there is no flow path member 41, the block connection member 43 The first space under the flat block (FB) and the second space under the corner block (CB) are blocked, and as a result, condensate flowing under each of the flat block (FB) and the corner block (CB) A problem arises in that the flow path of the liquid or nitrogen gas is blocked.

Of course, the flow path member 41 of this embodiment may be formed of a mesh-type melamine foam, but is not limited thereto and may include other members through which gas or liquid may pass. .

The block buffering member 42 may be installed on the side of the flat block FB forming one side of the gap by pre-construction.

The block buffering member 42 is thinly made of a soft insulator to relieve stress caused by thermal relaxation/contraction or stress generated between the flat block FB and the corner block CB due to external force caused by the hull behavior. It can be. A soft insulator forming the block buffering member 42 may be, for example, low-density polyurethane foam or glass wool. That is, the block buffering member 42 formed of a soft heat insulating material does not serve as a strength member like the block connecting member 43 to be described later, but can be processed to a minimum thickness that relieves external stress.

The block connection member 43 is post-construction by spraying a hard heat insulating material in a spray method using the spray device 50 inside the gap in which the flow path member 41 and the block buffer member 42 are pre-constructed. can be installed

The block connection member 43 may be formed of a material having the same or similar thermal insulation properties as those of the flat block FB and the corner block CB. That is, the block connection member 43 may be formed of various hard insulators having strength enough to withstand the load of the liquefied gas filled inside the liquefied gas storage tank 200 . A hard insulating material forming the block connection member 43 may be, for example, high-density polyurethane foam, but is not limited thereto.

The above-described block connection member 43, the upper surface level is formed similar to or the same as the upper surface level of the flat block (FB) and the corner block (CB).

Accordingly, when the difference in the gap for each section is large due to the tolerance of the tank hull, after displaying (measuring) the gap value between the flat block (FB) and the corner block (CB) at a specific interval, the spray device 50 transmits the corresponding information Enter , so that the amount of insulation sprayed can be controlled.

At this time, the spray device 50 may be manufactured to be installed on a rail similar to or the same as the rail for installing the corner connection barrier 42b, and the amount of the sprayed insulation material is flat block (FB) and corner block (CB) Adjust the amount of injected insulation so that it does not protrude as much as possible to the upper surface of the insulation.

In addition, for the installation of the corner connection barrier 42b as a subsequent process, if the level of the upper surface of the block connecting member 43 must exactly match the level of the upper surface of each of the flat block FB and the corner block CB, Levels can be matched by polishing protruding parts using a grinding machine after the first construction so that the amount of insulation material rises more finely than the upper surface level of each of the flat block (FB) and the corner block (CB).

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 known technology as another embodiment.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It will be clear that the modification or improvement is possible.

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

1, 100, 100a, 200: liquefied gas storage tank
2: 1st barrier
2a: flat primary barrier 2b: corner primary barrier
21b, 121b: barrier fixing member 21b1: coupling member
122b: stiffener 3: first insulation barrier
3a: flat primary insulating wall 31a: flat primary plywood
32a: flat primary insulation 33a: flat connection insulation wall
331a: flat connection plywood 332a: flat connection insulation
3b: Corner primary insulation wall 3b1: Inner first fixing part
3b2: inner second fixing part 31b: inner primary plywood
32b: corner primary insulation 33b: outer primary plywood
3b12: inner intermediate fixing part 31b12: inner intermediate plywood
32b12: corner middle insulation 34b: corner connection insulation wall
34b1: Corner first connection fixing part 34b2: Corner first connection fixing part
341b: corner connection insulation 342b, 343b: corner connection plywood
34b3: corner connection bent part 3b3: inner bent part
3b31: Insulation 3b32: Insulation
3b33: outer insulation 3b34: inner insulation
3b35: Insulation 3b36: Insulation
3b37: vacuum insulation panel 3b4: inner first packing material
3b5: inner second packing material 4: secondary barrier
41a: flat secondary barrier 42a: flat connection barrier
41b: corner secondary barrier 42b: corner connection barrier
5: Secondary insulation thermal wall 5a: Flat secondary insulation thermal wall
51a: flat secondary insulation 52a: flat secondary plywood
5b: corner secondary insulation wall 5b1: outer first fixing part
5b2: outer second fixing part 51b: inner second plywood
51b1: peripheral plywood 51b2: inclined plywood
52b: corner secondary insulation 53b: outer secondary plywood
5b12: outer intermediate fixing part 51b12: outer intermediate plywood
52b12: outer middle insulation 53b12: inner middle insulation
5b3: outer bent portion 5b31: insulation
5b32: insulation material 5b4: outer packing material
6: mastic 7: hull
81: first hole 82: second hole
83: third hole 9: foam plug
10: stuffing piece 11: body
12: end 20: adhesive
30: anti-bonding member 40: block connection system
41: flow path member 42: block buffer member
43: block connection member 50: spray device
ED: division direction FB: plane block
CB: corner block LB: lower block
UB: upper block UBB: upper connection block
CF: Chamfer GV: Groove

Claims (5)

A liquefied gas storage tank including a corner block disposed at a corner where the first and second surfaces of different angles meet to form a storage space for accommodating liquefied gas,
The corner block,
It is provided on the inside of the first and second surfaces and is bonded to a lower block made of a single board, a plurality of upper blocks disposed adjacent to and bonded to the lower block, and an upper surface of the lower block disposed adjacent to each other, It consists of an upper connection block connecting the lower blocks,
The lower block,
It consists of a corner secondary insulation wall installed on the hull, a corner secondary barrier disposed inside the corner secondary insulation thermal wall, and a corner connection barrier connecting the neighboring secondary corner barrier when the lower block is disposed adjacent to each other. ,
The upper block,
A barrier fixing member made of metal, which is bent at a predetermined angle on the inside of the first and second surfaces, fixes a corner primary barrier made of metal, and is disposed outside the corner primary barrier, and the barrier fixing member An inner primary plywood disposed outside, a corner primary insulation disposed outside the inner primary plywood, and an outer primary ply disposed outside the corner primary insulation and bonded to the lower block. made of wood,
The upper connection block,
The barrier fixing member made of metal, which is provided by being bent at a predetermined angle on the inside of the first and second surfaces, fixes the corner primary barrier made of metal, and is disposed outside the corner primary barrier, and the barrier Corner first connection plywood, corner connection insulation material, and corner second connection plywood are sequentially stacked on the outside of the fixing member, and corner first and second connection fixing parts provided on the inside of the first and second surfaces, respectively, It consists of a corner connection bent part installed between the first and second corner connection fixing parts,
The corner second connection plywood is bonded to the corner connection barrier of the lower block with an adhesive,
A liquefied gas storage tank comprising a bonding preventing member preventing the adhesive from escaping to the exposed surface of each of the corner connection bent portion and the corner connection insulation material, which are non-bonding areas, during bonding of the upper connection block. The method of claim 1, wherein the anti-bonding member,
A liquefied gas storage tank formed of a film of a sponge material and installed on an exposed surface of each of the corner connection bent portion and the corner connection insulation material, which are non-bonding areas of the upper connection block. The method of claim 1, wherein the upper block,
The inner primary plywood, the corner primary insulation material, and the outer primary plywood are sequentially stacked on the outside of the barrier fixing member, and the inner first and second inner sides are respectively provided on the inner side of the first and second surfaces. It consists of a fixing part and an inner bending part installed between the first and second inner fixing parts,
The anti-bonding member,
It is formed of a film of sponge material, and the exposed surface of the corner connection barrier of the lower block, which is in contact with the corner connection bent part, which is the non-bonding area of the upper connection block, and the corner connection insulation material, which is the non-bonding area of the upper connection block A liquefied gas storage tank installed on the exposed surface of each of the inner bent portion of the upper block and the corner primary insulation material adjacent to the upper block. According to claim 1,
Between the corner primary insulation of the upper block disposed adjacent to each other and between the corner primary insulation of the upper block and the corner connection insulation of the upper connection block disposed adjacent to each other, liquefied gas for which separate insulation filling is omitted. storage tank. The method of claim 1, wherein the barrier fixing member,
It is bent at an angle formed by the first and second surfaces, and a plurality of coupling members are provided on the rear surface, so there is no reinforcing member holding the inner primary plywood. It is bolted and fixed to the upper surface of
The upper block,
The inner primary plywood connected to the barrier fixing member fixing the corner primary barrier is formed thicker than the outer primary plywood connected to the corner secondary barrier,
The upper connection block,
The corner first connection plywood connected to the barrier fixing member fixing the corner primary barrier is formed thicker than the corner second connection plywood connected to the corner connection barrier connecting the corner secondary barrier,
The height of each of the inner primary plywood and the corner first connection plywood
A liquefied gas storage tank provided equal to or higher than the protruding height of the plurality of coupling members.

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