KR101372867B1 - Dual structure of storing container for liquefied natural gas - Google Patents

Abstract

The present invention relates to a liquefied natural gas storage container, to store the liquefied natural gas as well as to the liquefied natural gas pressurized at a constant pressure to supply to the consumer, a liquefied natural gas storage container having a dual structure with high efficiency of insulation It is about.
The structure of the liquefied natural gas storage container according to the present invention is a structure of the liquefied natural gas storage container, wherein the storage container has a dual structure forming a space between the inner shell 110 and the outer shell 120, Insulating layer portion 140 to reduce heat transfer, and installed to connect the inner shell 110 and the outer shell 120 to transfer the stress applied from the inside of the inner shell 110 to the outer shell 120. And a panel unit 130 including two or more panel section sections 1301 and 1302, wherein the inner shell 110 includes two or more barriers 111 and 112 spaced apart from each other, and two or more barriers 111 spaced apart from each other. And a first cover plate 115 disposed between or outside the 112 to be in contact with each of the two or more barriers 111 and 112, wherein each of the panel section 1301 and 1302 is a panel section ( 1301 and 1302 each have a section connection to which the section connection is connected. The inner shell connecting portion 1103, which is a portion of the inner shell 110 corresponding thereto, has a height h2 of the upper surface 1102 higher than the height h1 of the upper surface 1101 of the inner shell 110 of the other portion; It is characterized by.

Description

DUAL STRUCTURE OF STORING CONTAINER FOR LIQUEFIED NATURAL GAS}

The present invention relates to a liquefied natural gas storage container, to store the liquefied natural gas as well as to the liquefied natural gas pressurized at a constant pressure to supply to the consumer, a liquefied natural gas storage container having a dual structure with high efficiency of insulation It is about.

In general, liquefied natural gas (LNG) is a colorless transparent cryogenic liquid which is cooled to a temperature of -163 ° C at atmospheric pressure to reduce the volume of natural gas containing methane , It is known that it is more economical for long-distance transportation because of better transportation efficiency than the gas state.

Such liquefied natural gas has been applied to large-scale and long-distance transportation in order to satisfy the economical efficiency due to the construction cost of the construction plant and carrier of the production plant. On the other hand, pipelines and CNG (Compressed Natural Gas) Is known to be economical. However, transportation using pipelines is subject to geographical restrictions, environmental problems can be caused, and CNG has a disadvantage of low transportation efficiency.

LNG ships carrying liquefied natural gas should have a cargo hold, a container for storing liquefied gas, and these cargo holds can be divided into membrane and self-supporting methods according to their structure. The construction of such carriers is expensive.

In addition, the conventional method of distributing liquefied natural gas to the consumer requires not only high cost, but also it is difficult to flexibly cope with various demands of the consumer, and requires a separate storage tank at the consumer, which requires a lot of investment in infrastructure. Unloading liquefied natural gas also requires a lot of time and effort.

On the other hand, natural gas has a liquefaction point of -163 ℃ at atmospheric pressure, the liquefaction point has a characteristic that rises under atmospheric pressure when a constant pressure is applied. These characteristics can reduce processing steps such as removal of acid gas and fractionation of NGL (Natural Gas Liquid) in the liquefaction process, resulting in reduction of equipment and facility capacity, Thereby reducing the production cost of the product.

However, the conventional liquefied natural gas storage tanks provided in vessels equipped with liquefied natural gas terminals or gasification facilities are limited not only to a certain size, but also to liquefied natural gas And it is difficult to easily transport liquefied natural gas to the consumer site in accordance with the needs of various consumers.

1 is a view showing a vessel 1 and a membrane-type liquefied gas storage container 2 according to the prior art.

Referring to FIG. 1, the conventional membrane-type liquefied gas storage container 2 includes a secondary barrier layer 4 and a secondary barrier adhesively coated on the secondary insulation layer 4 fixed inside the hull 3. (5), consisting of a primary insulation layer 6 adhesively fixed on the secondary barrier 5, and a primary barrier 7 fixed on the primary insulation layer 6, wherein the double insulation and 2 It forms a barrier structure. In this case, a corrugated membrane sheet made of stainless steel was used as the primary barrier 7.

The conventional membrane-type liquefied gas storage container 2 cannot support the pressure generated inside the storage container 2 by the secondary barrier in a manner supported by the hull 3.

Therefore, the membrane-type liquefied gas storage container 2 according to the prior art can not support the pressure by the boil-off gas (BOG) generated inside the storage container 2 must be equipped with an evaporation gas treatment apparatus.

In addition, since the conventional membrane-type liquefied gas storage container (2) is fixedly installed in the carrier ship in order to distribute the liquefied gas to the consumer after the carrier arrives at the port of the consumer port by dropping the liquefied gas stored inside the storage container (2) There is a need for storage in a storage tank.

As a way to solve these problems, in order to store not only general liquefied natural gas but also liquefied natural gas pressurized at a certain pressure, a container which can withstand cryogenic and high pressure of -163 ° C or more with a low-temperature metallic material is used. To this end, the wall thickness of the container is inevitably increased, and there is another problem of difficulty in securing economic feasibility due to the use of expensive metal having excellent low temperature characteristics.

KR1020090080303 A

The present invention is to solve the conventional problems as described above, the liquefied natural gas as well as the liquefied natural gas pressurized at a constant pressure can be efficiently stored and supplied to the consumer, even if the liquefied natural gas leaks a plurality of barriers It is an object of the present invention to provide a liquefied natural gas storage container having a double structure to maintain the thermal insulation performance by preventing leakage of the liquefied natural gas into the insulating layer portion.

In addition, it is an object of the present invention to provide a liquefied natural gas storage container of a dual structure that can reduce the material cost by minimizing the use of expensive low-temperature steel by supporting the pressure inside the inner shell to the outside shell.

According to an aspect of the present invention for achieving the above object, in the structure of the liquefied natural gas storage container, the storage container is a dual structure forming a space between the inner shell 110 and the outer shell 120, the Insulating layer 140 to reduce heat transfer and the inner shell 110 and the outer shell 120 is installed in the space to connect the stress applied in the inner shell 110 to the outer shell 120. A panel portion 130 composed of two or more panel portion sections 1301 and 1302 for transmission; wherein the inner shell 110 has two or more barriers 111 and 112 spaced apart from each other and two or more barriers spaced apart from each other. A first cover plate 115 disposed between or outside the 111 and 112 to be in contact with each of the two or more barriers 111 and 112, wherein each of the panel portion sections 1301 and 1302 is the panel portion. Each of the sections 1301 and 1302 has a section connection to which the section is connected. The inner shell connecting portion 1103, which is a portion of the inner shell 110 corresponding to the connecting portion, has a height h2 of the upper surface 1102 higher than a height h1 of the upper surface 1101 of the inner shell 110 of another portion. It provides a liquefied natural gas storage container of a dual structure.

The inner shell connection portion 1103 has a height h2 of the upper surface 1102 of the upper portion 1102 of the inner shell 110 of the other portion due to an increased thickness than the inner shell 110 of the other portion. Higher than).

The inner shell connecting portion 1103 protrudes into the inner shell 110 so that the height h2 of the upper surface 1102 is higher than the height h1 of the upper surface 1101 of the inner shell 110 of the other portion. It is characterized by.

The inner shell connecting portion 1103 protrudes in a semicircular shape.

The inner shell connecting portion 1103 protrudes in a tongue structure.

Each of the two or more panel section 1301 and 1302 includes two or more vertical members 131, and one end of each of the vertical members 131 has an inner shell 110 among the two or more barriers 111 and 112. It is connected to the second barrier 112 is installed on the outermost side, the other end is connected to the outer shell 120;

Each of the two or more panel section 1301 and 1302 further includes a second horizontal member 1322 disposed between the other end of each of the two or more vertical members 131 and the outer shell 120. It is done.

Each of the two or more panel portion sections 1301 and 1302 may include a first horizontal member 1321 disposed between one end of each of the two or more vertical members 131 and a member installed on the outermost side of the inner shell 110. It further includes, The section connecting portion is connected to each of the first section connecting portion (1303) and the second horizontal member 1322, each of the first horizontal member 1321 is connected to the second section connecting portion (1304); It consists of; characterized by.

Each of the two or more vertical members 131 has a hollow portion 1311 inside.

The hollow part 1311 is surrounded by the first and second horizontal members 1321 and 1322 to form a closed space; .

Each of the two or more vertical members 131 are connected to each other to form a honeycomb partition 1312.

The two or more vertical members 131 are connected to each other to form a wavy corrugated partition wall 1315;

Each of the first and second horizontal members 1321 and 1322 is connected to be perpendicular to the vertical member 131.

The distance between the first horizontal member 1321 of the first section connection portion 1303 is equal to or smaller than the distance between the second horizontal member 1322 of the second sense connection portion 1304.

One end of the first horizontal member 1321 constituting the first section connection portion 1303 forms a protrusion 13211 protruding in the longitudinal direction of the first horizontal member 1321, and the other end of the first horizontal member 1321. To form a depression (13212) that can be combined with;

The first horizontal member 1321 of each of the panel sections 1301 and 1302 is configured to correspond to a shape of a member installed on the outermost side of the inner shell 110 to form an interior of the first horizontal member 1321. The entire shell side is in contact with the corresponding inner shell side member.

The second horizontal member 1322 fills a space that is not in contact with the outer shell 120, but is capable of transmitting to the outer shell 120 while supporting a stress transmitted to the second horizontal member 1322. Filler 133 having a strength; characterized in that it further comprises.

The first and second barriers 111 and 112 may be made of a metal that withstands low temperature of the liquefied natural gas, and the outer shell 120 may apply a stress (or load) applied inside the inner shell 110. It is made of a steel material to withstand;

The first and second barriers (111, 112) withstands a temperature of -163 ~ -95 ℃, the outer shell 120 withstands a pressure of 13 ~ 25bar;

The first and second barriers (111, 112) withstands a temperature of -120 ~ -95 ℃, the outer shell 120 withstands a pressure of 13 ~ 25bar;

The heat insulation layer part 140 is in a vacuum state.

According to another aspect of the present invention, in the structure of the liquefied natural gas storage container, the storage container is a dual structure forming a space between the inner shell 110 and the outer shell 120, to reduce heat transfer in the space Insulating layer portion 140 is installed, the inner shell 110 is composed of two or more barriers (111, 112) spaced apart, the outer shell of each of the two or more barriers (111, 112) of the inner shell (110) A stress relief part is provided to relieve the stress applied from the inside, and the space between the inner shell 110 and the outer shell 120 is relaxed to relax the stress relaxed by the stress relief part to the outer shell 120. And a stress transmission part for transmitting the inner shell connection part 1103, which is a part of the inner shell 110 corresponding to the section connection part, wherein the stress transmission part is divided into two or more sections. 110 parts The higher the height (h2) to bring the inner shell 110 to which the stress can absorb force applied to the connecting portion (1103); to provide a liquefied natural gas storage vessel of a double structure, characterized by.

According to the present invention, the liquefied natural gas, as well as the liquefied natural gas pressurized at a constant pressure can be efficiently stored and supplied to the consumer, and the production cost can be reduced by minimizing the use of metal having excellent low temperature characteristics, and various purposes and It is possible to easily meet the needs of the consumer, and to ensure the variety of types and sizes of transport vessels.

In addition, even when the liquefied natural gas leaks, the liquefied natural gas may not be leaked to the heat insulation layer part by a plurality of barriers, thereby maintaining heat insulation performance.

In addition, it is an object of the present invention to provide a liquefied natural gas storage container of a dual structure that can reduce the material cost by minimizing the use of expensive low-temperature steel by supporting the pressure inside the inner shell to the outside shell.

In addition, by installing a means for transmitting the inner pressure of the inner shell to the outer shell, the outer shell can support the pressure inside the inner shell, ensuring structural safety and at the same time using a metal with excellent low-temperature properties of the inner shell Can reduce the production cost.

1 is a view showing a vessel and a membrane-type liquefied gas storage container according to the prior art
Figure 2 is a longitudinal cross-sectional view schematically showing a liquefied natural gas storage container of the dual structure according to the present invention.
Figure 3 is a perspective view showing a cross-section of the body of the liquefied natural gas storage container according to the present invention.
4 is an enlarged view illustrating A of FIG. 2;
5 is an enlarged view of B of FIG. 2;
6 to 7 are views illustrating a panel portion structure of various embodiments according to the present invention.
8 illustrates various embodiments of a vertical member in accordance with the present invention.
9 to 14 show various embodiments of the reinforcing member according to the present invention.
Figure 15 shows various embodiments of the top cover according to the present invention.
FIG. 16 is a reference view showing stress concentration occurring at a connection portion of a panel section section; FIG.
17 to 21 show various embodiments of the panel section according to the present invention.
22 is a view showing a cross section of the storage container according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the following examples can be modified in various forms, and the scope of the present invention is not limited to the following examples.

In the drawings, like reference numerals refer to like elements throughout. The same reference numerals in the drawings denote like elements throughout the drawings.

2 to 22 are views illustrating a liquefied natural gas storage container of a dual structure according to various embodiments of the present invention.

The connection between the components constituting the present invention may be used after selecting any one of welding, adhesive, and stapling methods in consideration of the material of each component, unless otherwise specified.

When connecting between the components using an adhesive it is preferable to adhere using a cryogenic adhesive to suit the low temperature environment.

The liquefied natural gas storage container having a dual structure according to various embodiments of the present invention illustrated in FIGS. 2 to 22 includes an inner shell 110, an outer shell 120, a heat insulation layer part 140, and a stress relaxation part.

Storage container 100 according to the present invention is a dual structure forming a space between the inner shell 110 and the outer shell 120, the space is provided with an insulating layer 140 to reduce heat transfer, the inner shell 110 ) Is composed of two or more barriers 111 and 112 spaced apart from each other, and a stress applied inside the inner shell 110 between two or more barriers 111 and 112 or between two or more barriers 111 and 112. Or a stress relieving part for relieving the load).

The inner shell 110 forms a space for storing the liquefied natural gas inside, the outer shell 120 surrounds the outside of the inner shell 110 to form a space between the inner shell 110, the heat insulating layer The unit 140 is installed in the space between the inner shell 110 and the outer shell 120 to reduce heat transfer.

The stress relief part may relieve stress by transferring the stress applied inside the inner shell 110 to the outer shell 120. The inner shell 110 may be spaced apart by two or more barriers 111 and 112. The load applied from the inside of the to the outside through each barrier (111, 112) to relieve the stress applied to the inside of the inner shell (110).

Storage container 100, as shown in Figure 2, may further include an exhaust line 185 and the exhaust valve 186, the exhaust line 185 is connected to the upper portion of the inner space of the inner shell (110) To the outside, the exhaust valve 186 is installed in the exhaust line 185 to open and close the flow of gas so that the exhaust line 185 is the inner space of the inner shell 110 by opening the exhaust valve 186. Allow gas to be discharged from the outside. As a result, when the pressure inside the storage container 100 becomes higher than the designed value, the internal pressure of the inner shell 110 may be discharged to the outside to protect the storage container 100.

The inner shell 110 is composed of two or more barriers 111 and 112 spaced apart to sequentially seal the liquefied natural gas leaking from the inside of the inner shell 110.

Accordingly, the two or more barriers 111 and 112 may be in direct contact with the liquefied natural gas, so that the low temperature characteristics of the nucleated natural gas withstand the low temperature of the nucleated natural gas to prevent the brittle fracture due to contact with the cryogenic liquefied natural gas (Inba (invar), triplex, stainless steel (stainless steel, 5-9% nickel steel, etc.) or low temperature composite materials (such as glassfiber reinforexd epoxy). In addition, a metal or a material having a low coefficient of thermal expansion should be selected to reduce the stress generated by the barriers 111 and 112 in thermal contraction caused by cryogenic temperatures.

In addition, since the outer shell 120 has a stress (or load) applied to the inside of the inner shell 110 through the stress relief unit, the outer shell 120 has a strength that can withstand the pressure inside the inner shell 110 and has a cost side. We make with steel material having strength in.

That is, each of the two or more barriers 111 and 112 is made of a metal that withstands a temperature of -163 ~ -95 ℃ to include not only liquefied natural gas but also pressurized liquefied natural gas, the outer shell 120 is liquefied natural gas In addition, it is made of a steel material that withstands the pressure of liquefied natural gas (13 ~ 25bar).

Since the metal having excellent low temperature property is more expensive, two or more barriers 111 and 112 are metals having a liquefaction temperature range (-120 to -95 ° C) of liquefied natural gas corresponding to the pressure of the liquefied natural gas (13 to 25 bar). It is preferable to produce.

Due to this configuration, since the outer shell 120 bears the pressure inside the inner shell 110, the thickness of each of the two or more barriers 111 and 112 of the inner shell 110 may be made thinner than that of the outer shell 120. This reduces the manufacturing cost of the storage container.

The upper cover 161 and 162 and the lower cover 171 and 172 of each of the inner shell 110 and the outer shell 120 may be manufactured in various shapes, and the upper cover 161, 162 is illustrated as a cone shape, (b) an oval sphere shape, (c) a circular sphere shape, the top cover (cone) in a cone (cone) shape so as to facilitate the installation of the panel 130 to be described later ( 161 and 162 and lower covers 171 and 172 may be manufactured.

The bodies 151 and 152 of each of the inner shell 110 and the outer shell 120 may be formed to have at least three angles in cross section, and may be manufactured to have an appropriate shape in consideration of the transportability of the storage container 100. have.

If the bodies 151 and 152 of the storage container 100 have three angles, the cross section has a triangular shape, and if the body 151 has a plurality of angles, as shown in FIG. 3, the cross section has a polygonal shape.

In addition, assuming that the bodies 151 and 152 have a myriad of angles, a body having a tube shape (a horizontal cross section is circular) may be formed.

The stress relief part may transfer the stress applied from the inside of the inner shell 110 to the outer shell 120 to relax the stress, and thus, between two or more barriers 111 and 112 spaced apart from each other, as shown in FIG. 3. The first cover plate 115 may be installed to be in contact with each of the two or more barriers 111 and 112 to transmit the stress to the outer shell 120.

The first cover plate 115 may be installed to be in contact with the entire outer surface of the barrier 111 installed at the innermost side of the two or more barriers 111 and 112. In FIG. 4, the first cover plate 115 may have two or more surfaces. It is illustrated that the barriers 111 and 112 are installed to be in contact with each side of the barrier 111 and 112.

In addition, in the space in which the heat insulation layer 140 is installed, a stress transmission part for releasing the stress relaxed by the stress relaxation part once more and transmitting the stress to the outer shell 120 may be further installed.

The stress transmission part connects the inner shell 110 and the outer shell 120 so that the stress applied from the inside of the inner shell 110 is transferred to the outer shell 120 through the stress relief part, and as a stress transmission part in FIG. 17. The panel unit 130 is illustrated.

The panel unit 130 may be installed to be in contact with the entire outer surface of the barrier 112 installed at the outermost side of the two or more barriers 111 and 112, and as illustrated in FIG. 17, a section connection part divided into two or more parts. The inner shell connecting portion 1103, which is a part of the inner shell 110 corresponding to the section connecting portion, has a height (h2) higher than that of the inner shell 110 portion of the other portion. It is also possible to be able to absorb the load applied to it, the panel portion 130 is illustrated in Figure 2 or 5 to 22.

It is preferable to install the first cover plate 115 so as to be in contact with the entire side surfaces of each of the two or more barriers 111 and 112, and the damage is caused by the portion where the load is concentrated on the expensive barriers 111 and 112. In order to prevent it from being installed so as to be in contact with the entire side of the barrier (111, 112) in contact so that the portion where the load is concentrated. As a result, a load (pressure) applied from the inside of the inner shell 110 may be stably transmitted to the panel unit 130 to be described later.

Since the stress is transmitted through the contact surfaces of the first cover plate 115 and the two or more barriers 111 and 112, the stress may be safely transmitted to the outer shell side only when the surface is in contact with the two or more barriers 111 and 112. Therefore, the first cover plate 115 may be installed so that only the contact surface in contact with the barrier as a whole may be provided, and the inside of the first cover plate 115 may form a cavity to reduce its own weight.

The two or more barriers 111 and 112 include a first barrier 111 installed at the innermost side of the inner shell 110 and a second barrier 112 disposed at the outermost side, and the inner shell 110 may have a second barrier. It may further include a second cover plate 116 in contact with the entire outer surface of the barrier 112, as in the first cover plate 115 so as not to generate a portion where the load is concentrated in the second barrier (112). to be. In addition, similarly to the first cover plate 116, a cavity may be formed therein.

The insulating layer part 140 may be filled with a powder type insulating material (for example, perlite, glass bubble, etc.), and the insulating layer part 140 may be formed in a vacuum state. Insulating layer portion 140 of this structure can minimize the heat input into the storage container (100).

The heat insulating layer 140 is preferably filled with a powder-type heat insulating material to form a vacuum environment.

5 to 14 show the panel unit 130 which is various embodiments of the stress transmission unit according to the present invention.

As shown in FIG. 5, which is an enlarged view of B of FIG. 3, the panel unit 130 includes an inner shell 110 and an outer shell 120 in a space between the inner shell 110 and the outer shell 120. It is installed to connect the transfer the stress (or load) applied from the inside of the inner shell 110 to the outer shell 120.

The panel unit 130 includes two or more vertical members 131, and one end of each of the vertical members 131 is installed on the outermost side of the inner shell 110 among the two or more barriers 111 and 112. 112 is connected to the outer shell 120 so that the other end is connected to the outer shell 120 to transfer the stress (or load) applied inside the inner shell 110 to the outer shell 120.

On the other hand, when the other end of each of the vertical member 131 is directly connected to the outer shell 120, damage may occur in the connection portion with the outer shell 120, so that a separate member is installed in the connection portion, or FIGS. 5 to 7. As shown in FIG. 2, a second horizontal member 1322 may be installed between the other end of each of the vertical members 131 and the outer shell 120.

Since one end of each of the vertical members 131 is connected to the second barrier 112, damage may occur to the second barrier 112. However, as described in the embodiment of FIG. 4, an outer surface of the second barrier 112 may be used. When the second cover plate 116 is installed, damage may be prevented, and thus the first horizontal member 1321 may not be connected to one end of each of the vertical members 131. However, when the second cover plate 116 is not installed, one end of each of the vertical members 131 and the outermost side of the inner shell 110 is installed as shown in FIGS. 5 to 7 to prevent damage. The first horizontal member 1321 must be installed between the members (ie, the second barrier 112).

The second cover plate 116 and the first horizontal member 1321 may be installed together to reinforce the connection structure between the vertical member 131 and the inner shell 110 and to stabilize the stress (or load) transmission.

In addition, like the first cover plate 115 and the second cover plate 116 described in the embodiment of FIG. 4, the first horizontal member 1321 and the second horizontal member 1322 also have a cavity for reducing the weight. Can be formed.

As illustrated in FIG. 8A, each of the two or more vertical members 131 may form a hollow portion 1311 inside the same as the first horizontal member 1321 and the second horizontal member 1322. The hollow part 1311 may be surrounded by the first and second horizontal members 1321 and 1322 to form a closed space. Enclosed spaces can be filled with insulation.

However, the hollow member 1311 may allow the vertical member 131 to lack rigidity, thereby connecting the vertical members 131 to each other to form the honeycomb partition wall 1312.

In addition, each of the two or more vertical members 131 may be connected to each other, as shown in FIG. 8B, to form a wavy corrugated partition 1315.

The honeycomb partition 1312 and the vertical member 131 of the corrugated partition 1315 enhance stiffness and improve buckling strength.

Each of the first and second horizontal members 1321 and 1322 is preferably connected to be orthogonal to the vertical member 131, so that the first and second horizontal members 1321 and 1322 are capable of supporting a stress (or load) applied inside the inner shell 110. When installed to be inclined, the durability of the first and second horizontal members 1321 and 1322 may be lowered due to an increase in stress (or load) caused by rotational force.

The first and second horizontal members 1321 and 1322 may be manufactured in various shapes, and may be configured to have a curved surface as shown in FIG. 6, or may have a flat surface as shown in FIG. 7.

The first horizontal member 1321 is configured to correspond to the shape of the member (which may be the second barrier 112 or the second cover plate 116) installed on the outermost side of the inner shell 110, and thus, the first horizontal member It is preferable that the entire inner side of the inner shell side of the member 1321 is in contact with the member installed on the outermost side of the inner shell 110, and the entire surface of the contacting surface is in contact with each other for safe transmission of stress (or load).

Meanwhile, as described with reference to FIG. 3, since the cross section of the storage container 100 may have various shapes, when the cross section of the storage container 100 has a polygonal shape, the second horizontal member 1322 may also have a polygonal shape. The corners are formed on the second horizontal members 1321 and 1322 that are manufactured in a flat shape (see FIG. 21), and are installed to be in close contact with the outer shell 120. When the cross section of the storage container 100 has a circular shape, 2 horizontal member 1322 is also made of a circular curved surface and installed to be in close contact with the outer shell (120).

However, as shown in FIG. 6 or 7, the shape of the second horizontal member 1322 and the shape of the outer shell 120 may be installed so as not to be in close contact with each other. In this case, the inner shell may be filled with a filling material that is not in close contact with the filling material. The stress (or load) transmitted from the (110) side can be transmitted to the outer shell 120 as a whole. Therefore, the filler should be composed of materials (metals, composites, resins, etc.) having a predetermined strength.

Since the filler 133 must transmit the stress (or load) transmitted from the inner shell 110 side to the inner surface of the outer shell 120 evenly, the second horizontal member 1322 which is not in close contact with the outer shell 120. The spaces in between may be filled as shown in FIG. 7, or may be installed to have a predetermined interval as shown in FIG. 6.

The first and second horizontal members 1321 and 1322 are provided with reinforcing members 190, 195, and 200 to prevent material damage due to stress concentration occurring at a connection portion connected to the upper and lower ends of the vertical member 131. Can be.

The reinforcement members 190, 195 and 200 include the end reinforcement member 190 and the first and second side reinforcement members 195 and 200, as shown in FIGS. 9 to 14.

The end reinforcement member 190 is installed on at least one of upper and lower ends of the vertical member 131 connected to the first and second horizontal members 1321 and 1322.

The first side reinforcing member 195 is installed on at least one of the upper side and the lower side of the vertical member 131 connected to the first and second horizontal members 1321 and 1322, but the width direction of the vertical member 131 It is installed on both sides of the side.

The second side reinforcement member 200 is installed on at least one of the upper side and the lower side of the vertical member 131 connected to the first and second horizontal members 1321 and 1322, and the longitudinal direction of the vertical member 131 is provided. It is installed on both sides of the side.

Since the reinforcing members 190, 195, and 200 are installed to prevent material damage of the first and second horizontal members due to stress concentration, the end reinforcing members 190 are illustrated in FIGS. 9 to 14. And the first and second side reinforcing members 195 are installed to surround both ends of the vertical member 131 and both ends of the side surfaces, and are manufactured in a shape that can withstand the stress concentrated in the connection portion.

That is, as shown in FIG. 13, the upper end and the lower end of the vertical member 131 form the extension 1313 to be larger than the middle cross-sectional area of the vertical member 131, or as shown in FIG. 10. At least one of the reinforcing member 195 and the end steel member 190 may be formed so that some or all of the reinforcing member 195 and the end portion of the reinforcing member 190 are embedded in the first and second horizontal members 1321 and 1322.

Since the first side reinforcing member 195 is formed to be in contact with the side of the vertical member 131, when the side portion of the vertical member 131 forms a waveform, the first side reinforcing member 195 is also shown in FIG. 12A. To form a waveform as shown to be in contact with the side of the vertical member (131). Similarly, as shown in FIG. 13, the first side reinforcing member 195 may be moved to the vertical member 131 even when the cross-sectional area of the upper and lower ends of the vertical member 131 has an extension 1313 that is larger than the middle cross-sectional area. It should be formed to fit the side shape of the top and bottom of the.

That is, if the lateral shape of the expansion portion 1313 is a wavy wave shape, as shown in FIG. 14, the lateral reinforcement member 195 having a wave shape should be provided.

In addition, as shown in FIG. 9 or FIG. 10, the end reinforcement member 190 and the first and second side reinforcement members 195 and 200 may be integrally formed, or may be separately formed separately.

The first and second side reinforcing members 195 and 200 are formed to protrude by a predetermined height toward the heat insulating layer 140 from the end reinforcing member 190, or the first and second horizontal members 1321 and 1322 are mutually different. It may be installed to connect to reinforce the structure of the vertical member (131).

The second side reinforcing members 200 illustrated in FIGS. 9 to 12 are installed to connect the first and second horizontal members 1321 and 1322, and may be fastened by a stapling method.

15 and 17 to 22 illustrate various embodiments of the stress transmission unit according to the present invention, and shows a panel unit 130 in which two or more panel unit sections 1301 and 1302 are connected.

 As shown in FIG. 16, in the connecting portions 23 and 24 between the panel portion sections 1301 and 1302, the interval between the connecting portions 23 and 24 becomes narrow or wide due to thermal contraction or thermal expansion occurring in the inner shell 110. As a result, stress concentration may occur at two or more barriers of the inner shell 110 connected to the panel unit 130, thereby causing damage.

Damage in such a barrier may cause leakage of the liquefied natural gas stored inside the inner shell 110 or increase the risk of an accident such as an explosion of the storage container 110, and thus, as illustrated in FIGS. 17 to 20. It is necessary to enhance the rigidity of the inner shell connection 1103 located at the connection 1303, 1323 between the subsections 1301, 1302.

Accordingly, the panel portion 130 according to the present invention, in which two or more panel portion sections 1301 and 1302 are connected, as shown in FIGS. 17 to 20, is connected to each of the panel portion sections 1301 and 1302. The height of the top surface 1102 of the inner shell connecting portion 1103 having the section connecting portions 1303 and 1304 and part of the inner shell 110 connected to the panel portion 130 at a position corresponding to the section connecting portions 1303 and 1304. (h2) is formed to be higher than the height (h1) of the upper surface (1101) of the inner shell 110 of the other portion.

As a result, the structure having the height of the upper surface 1102 of the inner shell connecting portion absorbs the stress concentrated on the inner shell connecting portion 1103, thereby protecting the inner shell connecting portion 1103.

That is, as shown in (a) of FIG. 17, the height h2 of the upper surface 1102 of the inner shell connecting portion 1103 is increased by increasing the thickness of the inner shell connecting portion 1103 than the thickness of the inner shell 110 of another portion. Is higher than the height h1 of the upper surface 1101 of the inner shell 110 of the other portion, or the inner shell connecting portion 1103 as shown in (b) and (c) of FIG. The height h2 of the upper surface 1102 may be higher than the height h1 of the upper surface 1101 of the inner shell 110 of another portion by protruding inwardly.

The thickness of the inner shell connector 1103 thicker than the thickness of the inner shell 110 of the other portion increases the stiffness of the inner shell connector 1103 by the increased thickness, so that the inner shell connector 1103 is well focused on the stress concentration occurring in the inner shell connector 1103. It can withstand to improve the durability of the storage container (100).

In addition, when the inner shell connector 1103 protrudes in a semi-circular shape into the inner shell 110 or protrudes in a tongue structure, stress is concentrated on the inner shell connector 1103 to some extent. In addition, the inner shell connecting portion 1103 is able to absorb the gaps without breaking or damaged to protect the inner shell connecting portion 1103. ;

Each of the two or more panel section 1301 and 1302 may include a first horizontal member 1321 installed between one end of each of the two or more vertical members 131 and a member installed on the outermost side of the inner shell 110. The section connection part may include a first section connection part 1303 to which each of the first horizontal members 1321 and a second section connection part 1304 to which each of the second horizontal members 1322 are connected.

The body 150 of the storage container according to the present invention (150; 151, 152) is composed of a polygon as described in FIG. As described above, there may be many cases in which the panel 130 and the outer shell 120 are not in close contact with each other.

In this case, the panel 130 may be manufactured to be in close contact with the shape of the structure in contact with the panel 130, but the manufacturing of the panel 130 is difficult and expensive, and thus, FIG. 18 (b) and FIG. 19 ( b), as shown in (b) of FIG. 20, a panel section having a straight shape is manufactured, and the distance between the first horizontal member 1321 of the first section connection part 1303 is determined by the second sense connection part 1304. It may be formed to be equal to or smaller than the distance between the second horizontal member 1322 so that the panel section can be formed in a curved shape.

This allows the panel unit 130 of various shapes (angled or curved) to be configured at low cost, so that various shapes of storage containers can be manufactured.

As shown in FIG. 21, the first section connector 1303 may be connected to the first horizontal member 1321 at one end of the first horizontal member 1321 so that the panel sections 1301 and 1302 may be connected to each other stably. It forms a projection (13211) protruding in the longitudinal direction, and formed a depression (13212) that can be combined with the projection (13211) at the other end so that each panel section (1305, 1306) can be well engaged with each other. have.

In this case, in order to install the panel sections 1305 and 1306 having the projections 13211 and the depressions 1312 in the angled or curved storage containers, FIGS. 18 (b), 19 (b), and FIG. Since the panel section must be arranged in a bent form as shown in 20 (b), a first section connection 1303 in a bent form is required.

Of course, the protrusions 13211 and the depressions 1312 may be formed in the second section connection portion 1304, but in view of simplicity in FIG. 21, the protrusions 13211 and depressions only in the first section connection portion 1303 in FIG. Illustrated as having formed (13212).

However, when the first section connection portion 1303 having the protrusions 13211 and the depressions 1312 are formed in a bent form, there is a high risk of damage to the first section connection portion due to difficulty in manufacturing and weakening of rigidity, and thus, FIG. 21. As shown in FIG. 3, it is preferable to fabricate the panel section itself in a bent form, and to form protrusions 13111 and depressions 1312 in the first section connection portion 1303.

The corner panel section 1305 forms a first corner portion 1306 between both ends of the first horizontal member 1321, as shown in FIG. 21, and between both ends of the second horizontal member 1322. A second corner portion 1307 is formed in the recess.

The cover plate, the horizontal member, the vertical member, the reinforcing member, etc. of the configuration according to the present invention may be composed of various kinds of materials such as metals, composite materials, wood, steel, and the connection and barrier between these members. As mentioned above, welding or adhesive (cryogenic adhesive) may be used for the connection to the joint. However, welding should be used only between non-weldable materials.

Since each component according to the present invention can be configured in various combinations, the present invention is not limited to the combination between the configurations of the above-described embodiments.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention will be.

10: evacuation line 10a: valve
20: unloading line 20a: valve
100: storage container 110: inner shell
1103: inner shell connection 111: first barrier
112: second barrier 115: first cover plate
116: second cover plate 120: outer shell
130: panel portion 1301, 1302: panel portion section
1303: first section connection 1304: second section connection
131: vertical member 1311: hollow part
1312: honeycomb bulkhead 1313: extension
1315: corrugated bulkhead 132: horizontal member
1321: first horizontal member 1322: second horizontal member
133: filler 140: heat insulation layer portion
150: body 151: inner shell body
152: outer shell body 160: top cover
161: inner shell top cover 162: outer shell top cover
170: lower cover 171: inner shell lower cover
172: outer shell lower cover 180: first connection portion
181: second connection portion 185: exhaust line
186: exhaust valve 190: end reinforcement member
195: first side reinforcing member 200: second side reinforcing member
h1: Height of inner shell top h2: Height of inner shell top

Claims (22)

In a liquefied natural gas storage container,
The storage container has a dual structure forming a space between the inner shell 110 and the outer shell 120,
The outer shell 120 is installed in the space to reduce heat transfer and the inner shell 110 and the outer shell 120 to connect the inner shell 110 to the stress applied to the inner shell (110). A panel portion 130 composed of two or more panel portion sections 1301 and 1302 to be delivered to the
The inner shell 110 is provided between two or more barriers 111 and 112 spaced apart from each other, and a first cover that is in contact with each of the two or more barriers 111 and 112 spaced apart from each other. Plate 115; consisting of,
Each of the panel portion sections 1301 and 1302 has a section connection portion to which each of the panel portion sections 1301 and 1302 is connected, and an inner shell connection portion 1103 which is a part of the inner shell 110 corresponding to the section connection portion. Is the height h2 of the upper surface 1102 is higher than the height h1 of the upper surface 1101 of the inner shell 110 of another portion;
Liquefied natural gas storage container having a dual structure. The method according to claim 1,
The inner shell connection portion 1103 has a height h2 of the upper surface 1102 of the upper portion 1102 of the inner shell 110 of the other portion due to an increased thickness than the inner shell 110 of the other portion. Higher than);
Liquefied natural gas storage container having a dual structure. The method according to claim 1,
The inner shell connecting portion 1103 protrudes into the inner shell 110 so that the height h2 of the upper surface 1102 is higher than the height h1 of the upper surface 1101 of the inner shell 110 of the other portion. ;
Liquefied natural gas storage container having a dual structure. The method of claim 3,
The inner shell connecting portion 1103 protrudes in a semicircular shape;
Liquefied natural gas storage container having a dual structure. The method of claim 4,
The inner shell connecting portion 1103 protrudes in a tongue structure;
Liquefied natural gas storage container having a dual structure. The method according to any one of claims 1 to 5, wherein each of the two or more panel section 1301, 1302,
It is composed of two or more vertical members 131, one end of each of the vertical members 131 is connected to the second barrier 112 which is installed on the outermost side of the inner shell 110 of the two or more barriers (111, 112). The other end is connected to the outer shell 120;
Liquefied natural gas storage container having a dual structure. The method of claim 6, wherein each of the two or more panel section 1301, 1302,
A second horizontal member 1322 installed between the other end of each of the two or more vertical members 131 and the outer shell 120;
Liquefied natural gas storage container of a dual structure characterized in that it further comprises. The method of claim 7, wherein each of the two or more panel section 1301, 1302,
A first horizontal member 1321 installed between one end of each of the two or more vertical members 131 and a member installed on the outermost side of the inner shell 110;
The section connecting portion includes a first section connecting portion 1303 to which each of the first horizontal members 1321 and a second section connecting portion 1304 to which each of the second horizontal members 1322 are connected;
Liquefied natural gas storage container having a dual structure. The method according to claim 8,
Each of the two or more vertical members 131 has a hollow portion 1311 inside;
Liquefied natural gas storage container having a dual structure. The method of claim 9,
The hollow part 1311 is surrounded by the first and second horizontal members 1321 and 1322 to form a closed space;
Liquefied natural gas storage container having a dual structure. The method of claim 10,
Each of the two or more vertical members 131 connected to each other to form a honeycomb partition wall 1312;
Liquefied natural gas storage container having a dual structure. The method according to claim 8,
The two or more vertical members 131 are connected to each other to form a wavy corrugated partition wall 1315;
Liquefied natural gas storage container having a dual structure. The method according to claim 8,
Each of the first and second horizontal members 1321 and 1322 is connected to be perpendicular to the vertical member 131;
Liquefied natural gas storage container having a dual structure. The method according to claim 13,
The distance between the first horizontal member 1321 of the first section connector 1303 is equal to or smaller than the distance between the second horizontal member 1322 of the second sense connector 1304;
Liquefied natural gas storage container having a dual structure. The method according to claim 14,
One end of the first horizontal member 1321 constituting the first section connection portion 1303 forms a protrusion 13211 protruding in the longitudinal direction of the first horizontal member 1321, and the other end of the first horizontal member 1321. Forming a depression 1322 that can be coupled with the;
Liquefied natural gas storage container having a dual structure. The method according to claim 15, wherein the first horizontal member 1321 of each of the panel section 1301, 1302,
The entire inner shell side of the first horizontal member 1321 is in contact with the corresponding inner shell side member configured to correspond to the shape of the member installed on the outermost side of the inner shell 110;
Liquefied natural gas storage container having a dual structure. 18. The method of claim 16,
The second horizontal member 1322 fills a space that is not in contact with the outer shell 120, but is capable of transmitting to the outer shell 120 while supporting a stress transmitted to the second horizontal member 1322. A filler 133 having strength;
Liquefied natural gas storage container of a dual structure characterized in that it further comprises. 18. The method of claim 17,
The first and second barriers 111 and 112 are made of a metal that withstands low temperature of the liquefied natural gas,
The outer shell 120 is made of a steel material that withstands the stress (or load) applied to the inside of the inner shell (110);
Liquefied natural gas storage container having a dual structure. 19. The method of claim 18,
The first and second barriers 111 and 112 tolerate a temperature of −163 to −95 ° C., and the outer shell 120 to withstand a pressure of 13 to 25 bar;
Liquefied natural gas storage container having a dual structure. The method of claim 19,
The first and second barriers 111 and 112 tolerate a temperature of −120 to −95 ° C., and the outer shell 120 to withstand a pressure of 13 to 25 bar;
Liquefied natural gas storage container having a dual structure. The method of claim 20,
The heat insulation layer portion 140 is in a vacuum state;
Liquefied natural gas storage container having a dual structure. In a liquefied natural gas storage container,
The storage container is a dual structure forming a space between the inner shell 110 and the outer shell 120, the space is provided with a heat insulating layer portion 140 to reduce heat transfer,
The inner shell 110 is composed of two or more barriers (111, 112) spaced apart, the stress to relieve the stress applied to the inside of the inner shell (110) on the outside of each of the two or more barriers (111, 112) Install the relief,
In the space between the inner shell 110 and the outer shell 120 is provided a stress transfer portion to relax to relieve the stress relaxed by the stress relief portion to transfer to the outer shell 120,
The stress transmission part is composed of a section connecting portion divided into two or more so that the inner shell connecting portion 1103, which is part of the inner shell 110 corresponding to the section connecting portion, has a height higher than that of the inner shell 110 portion of the other portion (h2). To absorb the stress applied to the inner shell (110) connection portion (103);
Liquefied natural gas storage container having a dual structure.

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